High-temperature observation furnace for reversible solid oxide cell stack test

Abstract

The invention discloses a high-temperature observation furnace for testing a reversible solid oxide cell stack. The high-temperature observation furnace comprises a base, an electric furnace, a pressure applying assembly and a plurality of camera assemblies, a plurality of first mounting holes communicated with a furnace chamber are uniformly formed in the circumference of the electric furnace, a via hole communicated with the furnace chamber is formed in the top of the electric furnace, and the furnace chamber is used for placing a battery stack; the pressure applying assembly is arranged on the base and located above the electric furnace, and the pressure applying assembly is used for stretching into the furnace chamber from the via hole to press the cell stack; the plurality of camera assemblies are in one-to-one correspondence with the plurality of first mounting holes, the camera assemblies are matched with the first mounting holes, and the camera assemblies are mounted in the first mounting holes and face the cell stack in the furnace chamber. According to the invention, the reversible solid oxide cell stack can be observed, and the problem that the dynamic change at high temperature cannot be monitored and recorded in real time in the test and the performance test of the cell stack is not facilitated is solved.

Description

Technical Field

[0001] The invention relates to the technical field of reversible solid oxide battery stack testing equipment, and in particular to a high-temperature observation furnace for reversible solid oxide battery stack testing. Background Art

[0002] As a type of fuel cell, reversible solid oxide cell (RSOC) has its unique advantages. It uses high-temperature electrochemical reactions to directly convert chemical energy into electrical energy, and has the advantages of high efficiency, low noise, and no sulfur oxide and nitrogen oxide emissions. At the same time, RSOC can also significantly reduce carbon dioxide emissions and is easy to capture. This technology can use a variety of resources such as natural gas, coal-to-gas, and biogas as fuel to achieve efficient power generation, providing a new path for the clean use of fossil energy in my country.

[0003] Patent CN212540648U discloses an integrated high-temperature fuel cell test bench, including a test bench, wherein the test bench is composed of a heating furnace, an integrated gas chromatography workstation, a tool / parts drawer group, a temperature control panel group, a gas type selection and flow control panel, an automatic control display area, and an expandable electronic load area.

[0004] During the actual operation of the RSOC stack, especially under conditions of high temperature and load pressure, the stack may undergo dimensional changes. However, the above-mentioned existing technologies are unable to monitor and record these dynamic changes under high temperature in real time during the test, which is not conducive to the performance testing of the stack. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a high-temperature observation furnace for reversible solid oxide battery stack testing, so as to solve the technical problem that the prior art cannot monitor and record these dynamic changes under high temperature in real time during the test, which is not conducive to the performance testing of the battery stack.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a high temperature observation furnace for testing a reversible solid oxide battery stack, comprising: Pedestal; An electric furnace, wherein a plurality of first mounting holes connected to a furnace cavity are arranged on the circumference of the electric furnace, the plurality of first mounting holes are evenly arranged, a through hole connected to the furnace cavity is arranged on the top of the electric furnace, and the furnace cavity is used for placing a battery stack; A pressure component, disposed on the base and located above the electric furnace, the pressure component is used to extend from the through hole into the furnace cavity to press the battery stack; and A plurality of camera assemblies correspond one-to-one to the plurality of first mounting holes, the camera assemblies are adapted to the first mounting holes, and the camera assemblies are installed in the first mounting holes and face the battery stack in the furnace cavity.

[0007] In some embodiments, the camera assembly includes a high-temperature resistant high-definition camera, and the high-temperature resistant high-definition camera can be rotated up, down, left, and right.

[0008] In some embodiments, the operating temperature of the high-definition camera is 600-900°C, the resolution is 1280x960, and the pixels are 4.4μm horizontally and 4.4μm vertically.

[0009] In some embodiments, the high-temperature observation furnace for reversible solid oxide battery stack testing further includes a temperature detection component, which is disposed in the furnace cavity and is used to detect the temperature of the battery stack in the furnace cavity.

[0010] In some embodiments, a plurality of second mounting holes are provided on the top of the electric furnace, and the plurality of second mounting holes are arranged at intervals along the circumference of the through hole; The temperature detection component includes a plurality of temperature sensors, and the plurality of temperature sensors correspond to the plurality of second mounting holes one by one. Each of the temperature sensors is installed in the second mounting hole and its detection portion extends into the furnace cavity.

[0011] In some embodiments, the high-temperature observation furnace for reversible solid oxide battery stack testing also includes a connecting pipe and a placement plate, wherein the connecting pipe is installed on the base and extends into the furnace cavity, and the upper end of the connecting pipe is used to connect to the battery stack, and the placement plate is installed on the connecting pipe and is located in the furnace cavity, and the placement plate is used for placing the battery stack.

[0012] In some embodiments, the electric furnace includes two furnace bodies arranged in half, and the two furnace bodies are slidably installed on the base along directions of approaching and moving away from each other, so as to have an open state in which they move away from each other to open the furnace cavity, and a closed state in which they move toward each other to close the furnace cavity.

[0013] In some embodiments, the high temperature observation furnace for reversible solid oxide battery stack testing further includes a driving component, wherein the driving component is connected to the two furnace bodies to drive the two furnace bodies to move closer to and away from each other.

[0014] In some embodiments, the drive assembly includes a screw, a handwheel and two connecting parts. The screw is rotatably installed on the base. The screw includes a first connecting section and a second connecting section connected in sequence. The threads of the first connecting section and the second connecting section are arranged oppositely. The handwheel is installed on one end of the screw. The two connecting parts are respectively connected to the two furnace bodies. The connecting parts are provided with threaded holes. The two connecting parts are respectively threadedly matched with the first connecting section and the second connecting section.

[0015] In some embodiments, the high temperature observation furnace for reversible solid oxide battery stack testing also includes a locking assembly, which is arranged on the furnace body so that when in the closed state, the locking assembly connects the two furnace bodies to limit the movement of the two furnace bodies.

[0016] Compared with the prior art, the present invention provides a high-temperature observation furnace for reversible solid oxide battery stack testing, wherein the electric furnace can heat the battery stack so that it works at a specific temperature, the pressure-applying assembly is disposed on the base and is located above the electric furnace, the pressure-applying assembly is used to extend from the through hole into the furnace cavity to compress the battery stack, the pressure-applying assembly can apply a certain pressure to the battery stack so that it works under a specific pressure, the camera assembly is installed in the first installation hole and faces the battery stack in the furnace cavity, and the battery stack can be operated under high temperature and load pressure conditions through the coordinated use of the electric furnace and the pressure-applying assembly, and the multiple camera assemblies can observe the dimensional changes of the battery stack during operation in all directions. During specific use, the battery stack is placed in the furnace cavity, and then the electric furnace begins to heat up. During the process of heating from room temperature to 750°C, each camera component takes three photos at each temperature point to record the changes in the core during the heating process. During the 750°C reduction and subsequent tests, photos are taken every ten seconds to check for abnormal conditions in local positions in the core. During the cooling process after the test, photos are taken three times at each temperature point to record the changes in the core during the cooling process. After the experiment, the photos are compared with the test data to provide a basis for analysis theory. The present application can observe the reversible solid oxide battery stack, overcome the problem that it is impossible to monitor and record these dynamic changes under high temperatures in real time during the test, which is not conducive to the performance test of the battery stack.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a high-temperature observation furnace for reversible solid oxide battery stack testing provided by the present invention; Figure 2 yes Figure 1 A front cross-sectional view of a high-temperature observation furnace for reversible solid oxide battery stack testing; Figure 3 yes Figure 1 A top view of the high-temperature observation furnace used for reversible solid oxide battery stack testing; Figure 4 yes Figure 1 A three-dimensional schematic diagram of a medium electric furnace; Figure 5 yes Figure 1 Schematic diagram of the explosion of the Zhongdian furnace; Figure 6 yes Figure 1 The main view of the electric furnace; Figure 7 yes Figure 6 Sectional view along AA; Figure 8 yes Figure 6 Cross-sectional view along BB.

[0019] Description of reference numerals: 1-base, 2-electric furnace, 21-furnace body, 211-first mounting hole, 212-through hole, 213-second mounting hole, 214-mounting groove, 215-locking groove, 3-pressure assembly, 31-hydraulic cylinder, 32-pressure plate, 4-camera assembly, 5-temperature sensor, 6-connecting pipe, 7-placement plate, 8-drive assembly, 81-screw, 82-handwheel, 83-connecting piece, 9-locking piece. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In order to solve the technical problem in the prior art that it is impossible to monitor and record these dynamic changes under high temperature in real time during testing, which is not conducive to the performance testing of the fuel cell stack, the present invention provides a high-temperature observation furnace for reversible solid oxide battery stack testing, which is capable of observing the reversible solid oxide battery stack and overcoming the problem that it is impossible to monitor and record these dynamic changes under high temperature in real time during testing, which is not conducive to the performance testing of the fuel cell stack.

[0022] See also Figure 1 , Figure 1 It is a schematic structural diagram of a high temperature observation furnace for testing a reversible solid oxide battery stack in one embodiment of the present invention.

[0023] The present invention provides a high-temperature observation furnace for testing a reversible solid oxide battery stack, comprising a base 1, an electric furnace 2, a pressure assembly 3 and a plurality of camera assemblies 4; the circumference of the electric furnace 2 is provided with a plurality of first mounting holes 211 connected to the furnace cavity, the plurality of first mounting holes 211 are evenly arranged, the top of the electric furnace 2 is provided with a through hole 212 connected to the furnace cavity, the furnace cavity is used for placing the battery stack; the pressure assembly 3 is arranged on the base 1 and located above the electric furnace 2, the pressure assembly 3 is used to extend from the through hole 212 into the furnace cavity to press the battery stack; the plurality of camera assemblies 4 correspond one-to-one to the plurality of first mounting holes 211, the camera assemblies 4 are adapted to the first mounting holes 211, and the camera assemblies 4 are installed in the first mounting holes 211 and face the battery stack in the furnace cavity.

[0024] In this example, see Figures 1 to 3 The electric furnace 2 can heat the battery stack to make it work at a specific temperature. The pressure component 3 is arranged on the base 1 and located above the electric furnace 2. The pressure component 3 is used to extend from the through hole 212 into the furnace cavity to press the battery stack. The pressure component 3 can apply a certain pressure to the battery stack to make it work under a specific pressure. The camera component 4 is installed in the first installation hole 211 and faces the battery stack in the furnace cavity. The battery stack can be operated under high temperature and load pressure through the coordinated use of the electric furnace 2 and the pressure component 3. The multiple camera components 4 can observe the dimensional changes of the battery stack during operation in all directions. When used specifically, the electric furnace 2 The cell stack is placed in the furnace cavity, and then the electric furnace 2 begins to heat up. During the process of heating from room temperature to 750°C, each camera component 4 takes three photos at each temperature point to record the changes in the core during the heating process. During the 750°C reduction and subsequent tests, photos are taken every ten seconds to check for abnormal conditions in local positions in the core. During the cooling process after the test, photos are taken three times at each temperature point to record the changes in the core during the cooling process. After the experiment, the photos are compared with the test data to provide a basis for the analysis theory. The present application can observe the reversible solid oxide battery stack, overcome the problem that it is impossible to monitor and record these dynamic changes under high temperatures in real time during the test, which is not conducive to the performance test of the battery stack.

[0025] In this embodiment, four first mounting holes 211 are provided, and the four first mounting holes 211 are evenly distributed on the circumference of the electric furnace 2. Correspondingly, four camera assemblies 4 are provided. By setting four camera assemblies 4, the purpose of all-round observation of the battery stack can be achieved.

[0026] In one embodiment, the camera assembly 4 includes a high-temperature resistant high-definition camera, and the high-temperature resistant high-definition camera can be rotated up, down, left, and right.

[0027] In the present embodiment, since the temperature in the furnace cavity of the electric furnace 2 is relatively high during operation, in order to avoid the influence of high temperature on the camera component 4, the camera component 4 is a high-temperature resistant high-definition camera. The high-temperature resistant high-definition camera has high-temperature resistance and can operate in a relatively high temperature environment, which is beneficial to the observation of the battery stack. It can be understood that the camera part of the high-temperature resistant high-definition camera can be rotated up, down, left and right to achieve the purpose of adjusting the camera angle, and the magnification of the high-temperature resistant high-definition camera can also be enlarged and reduced.

[0028] It is understandable that the high temperature resistant high definition camera is a prior art, and its rotation structure and magnification adjustment are also prior art, which will not be elaborated here.

[0029] In this embodiment, the high-temperature resistant high-definition camera can be installed in the first installation hole 211 by using high-temperature resistant sealant.

[0030] In one of the embodiments, the operating temperature of the high-definition camera is 600-900°C, the resolution is 1280x960, and the pixels are 4.4μm horizontally and 4.4μm vertically.

[0031] In one embodiment, see Figures 1 to 3 The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a temperature detection component, which is arranged in the furnace cavity and is used to detect the temperature of the battery stack in the furnace cavity.

[0032] In this embodiment, in order to monitor the temperature field changes in the fuel cell stack in real time, a temperature detection component is further provided in the furnace cavity. The temperature detection component is used to detect the temperature field changes in the fuel cell stack in real time, and cooperates with the high-temperature resistant high-definition camera to achieve the purpose of shooting at each temperature point.

[0033] In one embodiment, see Figures 2 to 4 A plurality of second mounting holes 213 are provided on the top of the electric furnace 2, and the plurality of second mounting holes 213 are arranged at intervals along the circumference of the through hole 212; the temperature detection component includes a plurality of temperature sensors 5, and the plurality of temperature sensors 5 correspond one-to-one to the plurality of second mounting holes 213, and each of the temperature sensors 5 is installed in the second mounting hole 213 and its detection part extends into the furnace cavity.

[0034] In this embodiment, the through hole 212 is located in the middle of the electric furnace 2, and four second mounting holes 213 are provided. The four second mounting holes 213 are evenly arranged along the circumference of the through hole 212. Correspondingly, four temperature sensors 5 are provided. The temperature sensors 5 are installed in the second mounting holes 213, and their detection layout is located in the furnace cavity. By arranging the four temperature sensors 5 in various directions of the battery stack, the temperature field changes in the battery stack can be monitored, thereby identifying the location of the battery stack sealing failure state.

[0035] In this embodiment, the temperature sensor 5 is a thermocouple.

[0036] In this example, see Figure 2 The force-applying assembly includes a hydraulic cylinder 31 and a pressure plate 32. The hydraulic cylinder 31 is located above the electric furnace 2, and its push rod is set downward. The through hole 212 is adapted to the push rod diameter of the hydraulic cylinder 31. The push rod extends from the through hole 212 into the furnace cavity and is connected to the pressure plate 32, so that the pressure plate 32 is pushed by the hydraulic cylinder 31 to press the battery stack.

[0037] In one embodiment, see Figure 6 The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a connecting pipe 6 and a placement plate 7. The connecting pipe 6 is installed on the base 1 and extends into the furnace cavity. The upper end of the connecting pipe 6 is used to connect with the battery stack. The placement plate 7 is installed on the connecting pipe 6 and is located in the furnace cavity. The placement plate 7 is used for placing the battery stack.

[0038] In this embodiment, since gas fuel needs to be transported into the battery stack when the battery stack is working, and the battery stack will also exhaust gas at the same time, four connecting pipes 6 are provided, and the four connecting pipes 6 are linearly arranged in the middle of the electric furnace 2. The four connecting pipes 6 are all connected to the placement plate 7. Four avoidance holes are provided at the bottom of the electric furnace 2. The connecting pipes 6 are passed through the avoidance holes and fixedly connected to the base 1. The battery stack is connected to the external pipeline through the connecting pipes 6. Among the four connecting pipes 6, two of the connecting pipes 6 are air inlet pipes, and the two air inlet pipes are respectively used to transport fuel gas and air to the battery stack, and the other two connecting pipes 6 are air outlet pipes, and the two air outlet pipes are respectively used to discharge the fuel gas and air of the battery.

[0039] In one embodiment, see Figures 4 to 6 The electric furnace 2 includes two furnace bodies 21 disposed in half, and the two furnace bodies 21 are slidably installed on the base 1 along directions of approaching and moving away from each other, so as to have an open state in which they move away from each other to open the furnace cavity, and a closed state in which they move toward each other to close the furnace cavity.

[0040] In the present embodiment, the electric furnace 2 is overall cylindrical, and its furnace cavity is also cylindrical. In order to facilitate the placement and removal of the battery stack, the electric furnace 2 is composed of two furnace bodies 21 arranged in half. Accordingly, the through hole 212, the avoidance hole and the two first mounting holes 211 are all arranged in half, and the two furnace bodies 21 are arranged relatively to each other along a first direction. The two furnace bodies 21 are slidably installed on the base 1 along the first direction, so that the two furnace bodies 21 can approach and move away from each other. When the two furnace bodies 21 are close to each other and abut against each other, they can enclose to form a complete furnace cavity. When the two furnace bodies 21 are away from each other, the furnace cavity can be opened. Since the placement plate 7 is installed on the base 1 through the connecting pipe 6, the movement of the furnace body 21 does not affect the placement plate 7, so as to facilitate the removal of the fuel cell.

[0041] In one embodiment, see Figure 1 to Figure 2 The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a driving component 8, which is connected to the two furnace bodies 21 to drive the two furnace bodies 21 to move closer to and away from each other.

[0042] In this embodiment, in order to improve the opening and closing efficiency, the two furnace bodies 21 can be set to move synchronously. By setting the driving component 8, the two furnace bodies 21 can be driven to move synchronously.

[0043] In one embodiment, see Figure 2 The driving assembly 8 includes a screw rod 81, a hand wheel 82 and two connecting pieces 83. The screw rod 81 is rotatably mounted on the base 1. The screw rod 81 includes a first connecting section and a second connecting section connected in sequence. The threads of the first connecting section and the second connecting section are arranged oppositely. The hand wheel 82 is installed at one end of the screw rod 81. The two connecting pieces 83 are respectively connected to the two furnace bodies 21. The connecting piece 83 is provided with a threaded hole. The two connecting pieces 83 are respectively threadedly matched with the first connecting section and the second connecting section.

[0044] In this embodiment, the screw rod 81 is rotatably installed on the base 1 along an axis in the first direction, and the threads of the first connecting section and the second connecting section on the screw rod 81 are arranged oppositely, one of the connecting pieces 83 is connected to one of the furnace bodies 21 and is threadedly matched with the first connecting section, and the other connecting piece 83 is connected to the other furnace body 21 and is threadedly matched with the second connecting section. When the screw rod 81 is rotated, the two furnace bodies 21 can be driven to approach and move away from each other at the same time, which is simple to operate and easy to use.

[0045] In one embodiment, see Figures 6 to 8The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a locking assembly, which is arranged on the furnace body 21. When in the closed state, the locking assembly connects the two furnace bodies 21 to limit the movement of the two furnace bodies 21.

[0046] In this embodiment, since the furnace body 21 is slidably installed on the base 1, in order to prevent the furnace body 21 from accidentally sliding during testing, a locking assembly is also provided on the furnace body 21. When the two furnace bodies 21 are closed, the locking assembly connects the two furnace bodies 21, thereby achieving the purpose of fixing the furnace body 21.

[0047] In this embodiment, a side wall of one of the furnace bodies 21 is provided with a semicircular mounting groove 214, the mounting groove 214 is coaxial with the furnace body 21, and a side wall of the other furnace body 21 is provided with a quarter locking groove 215, the locking groove 215 is coaxial with the furnace body 21, and the mounting groove 214 and the locking groove 215 correspond to each other and have the same radius; The locking assembly includes a locking member 9 arranged in a semicircular shape, and the locking member 9 is slidably installed in the installation groove 214. When the two furnace bodies 21 are closed, the installation groove 214 and the locking groove 215 are correspondingly connected, and the locking member 9 is driven to partially extend into the locking groove 215, so that the two furnace bodies 21 can be limited to restrict their movement.

[0048] The surface of the furnace body 21 is also provided with an elongated hole connected to the mounting groove 214 , and a protrusion is formed on the outer side of the locking member 9 , and the protrusion extends from the elongated hole to the mounting groove 214 , so that the operator can push the locking member 9 .

[0049] In this embodiment, two mounting grooves 214 and two locking grooves 215 are provided, and the two locking grooves 215 are located on opposite sides of the furnace body 21. Two locking members 9 are also provided, and the two locking members 9 are installed in the two mounting grooves 214 one by one. The two locking members 9 can lock the opposite sides of the furnace body 21 to improve the locking strength.

[0050] In this embodiment, two locking assemblies are provided, and the two locking assemblies are respectively located at the upper and lower ends of the furnace body 21 .

[0051] In order to better understand the present invention, the following Figures 1 to 8 The technical solution of the present invention is described in detail: In the initial state, the two furnace bodies 21 are in an open state to expose the placement plate 7, and then the battery stack is placed on the placement plate 7, and the battery stack is connected to the connecting pipe 6, and then the hand wheel 82 is turned to drive the two furnace bodies 21 to approach each other through the screw rod 81 until the two furnace bodies 21 are closed, and the hydraulic cylinder 31 drives the pressing plate 32 to press the battery stack downward, so that the installation and fixation of the device are completed, and then the electric furnace 2 and the battery stack are started for the experiment, and the temperature is increased from room temperature to 750°C. Each camera takes three photos at each temperature point in the process of heating from room temperature to 750°C to record the changes in the core during the heating process. During the 750°C reduction and subsequent testing, keep taking photos every ten seconds, and adjust the camera angle and magnification as needed to check the abnormal situation of the local position in the core. During the cooling process after the test, take three photos at each temperature to record the changes in the core during the cooling process. After the experiment, compare the photos with the test data to provide a theoretical basis for analysis.

[0052] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A high temperature observation furnace for reversible solid oxide battery stack testing, characterized in that: It includes: Pedestal; An electric furnace, wherein a plurality of first mounting holes connected to a furnace cavity are arranged on the circumference of the electric furnace, the plurality of first mounting holes are evenly arranged, a through hole connected to the furnace cavity is arranged on the top of the electric furnace, and the furnace cavity is used for placing a battery stack; A pressure component, disposed on the base and located above the electric furnace, the pressure component is used to extend from the through hole into the furnace cavity to press the battery stack; and A plurality of camera assemblies correspond one-to-one to the plurality of first mounting holes, the camera assemblies are adapted to the first mounting holes, and the camera assemblies are installed in the first mounting holes and face the battery stack in the furnace cavity.

2. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 1, characterized in that: The camera assembly comprises a high-temperature resistant high-definition camera, and the high-temperature resistant high-definition camera can be rotated up, down, left and right.

3. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 2, characterized in that: The operating temperature of the high-temperature resistant HD camera is 600-900°C, the resolution is 1280x960, and the pixels are 4.4μm horizontally and 4.4μm vertically.

4. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 1, characterized in that: The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a temperature detection component, which is arranged in the furnace cavity and is used to detect the temperature of the battery stack in the furnace cavity.

5. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 4, characterized in that: The top of the electric furnace is provided with a plurality of second mounting holes, and the plurality of second mounting holes are arranged at intervals along the circumference of the through hole; The temperature detection component includes a plurality of temperature sensors, and the plurality of temperature sensors correspond to the plurality of second mounting holes one by one. Each of the temperature sensors is installed in the second mounting hole and its detection portion extends into the furnace cavity.

6. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 1, characterized in that: The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a connecting pipe and a placement plate. The connecting pipe is installed on the base and extends into the furnace cavity. The upper end of the connecting pipe is used to connect with the battery stack. The placement plate is installed on the connecting pipe and is located in the furnace cavity. The placement plate is used for placing the battery stack.

7. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 1, characterized in that: The electric furnace comprises two furnace bodies arranged in half, and the two furnace bodies are slidably mounted on the base in directions of approaching and moving away from each other, so as to have an open state in which the furnace bodies move away from each other to open the furnace cavity, and a closed state in which the furnace bodies move toward each other to close the furnace cavity.

8. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 7, characterized in that: The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a driving component, which is connected to the two furnace bodies to drive the two furnace bodies to move closer to and away from each other.

9. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 8, characterized in that: The driving assembly includes a screw, a handwheel and two connecting parts. The screw is rotatably installed on the base. The screw includes a first connecting section and a second connecting section connected in sequence. The threads of the first connecting section and the second connecting section are arranged oppositely. The handwheel is installed at one end of the screw. The two connecting parts are respectively connected to the two furnace bodies. The connecting parts are provided with threaded holes. The two connecting parts are respectively threadedly matched with the first connecting section and the second connecting section.

10. The high temperature observation furnace for reversible solid oxide battery stack testing according to claim 7, characterized in that: The high-temperature observation furnace for reversible solid oxide battery stack testing also includes a locking assembly, which is arranged on the furnace body. When in the closed state, the locking assembly connects the two furnace bodies to limit the movement of the two furnace bodies.

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