A stand-alone pressurization and monitoring system and method for pressurizing a SOFC stack module

Abstract

The application provides an independent pressurization and monitoring system and a pressurization method for a SOFC stack module, and the independent pressurization and monitoring system for the SOFC stack module comprises a heat-insulated and sealed stack heat box shell, a plurality of groups of SOFC stacks arranged in the shell, a stack support and a bottom manifold gas distribution assembly, and further comprises a top pressurization assembly; the application has the beneficial effects that: the multi-stack completely independent pressurization architecture, the differentiated adaptation to assembly tolerances and thermal deformation differences are compared with the traditional overall press plate compression mode, each group of stacks is provided with an independent screw rod pressurization system, the initial pre-tightening force can be individually set, and the assembly height tolerances of each group of stacks are adapted; the independent constant value high-temperature spring is matched to realize the single-stack thermal deformation differentiation compensation, and the industry pain points of uneven pressure and single-stack attenuation under the multi-stack series and parallel connection working conditions are solved.

Description

Technical Field

[0001] This invention relates to the field of fuel cell module technology, and in particular to an independent pressurization and monitoring system and pressurization method for SOFC fuel cell modules. Background Technology

[0002] High-power SOFC power generation systems typically arrange multiple stacks in series and parallel inside an insulated heat box to increase the total output power. At present, the mainstream compression schemes in the industry are mainly divided into two categories: a unified rigid compression structure for multiple stacks and an independent spring self-tightening structure for a single stack. Both types of schemes have certain limitations in practical engineering applications.

[0003] The rigid overall clamping of multiple fuel cell stacks makes it difficult to achieve differentiated deformation compensation. Some existing multi-stack heat exchangers use a single large-length pressure plate with uniform bolts for overall clamping, with multiple stacks sharing a single force system. The stacking height of each stack has machining tolerances, and the amount of thermal expansion under high-temperature conditions and the amount of creep deformation during long-term operation will also have certain differences. The overall rigid clamping structure is difficult to achieve differentiated pressure compensation for each stack. During the heating and expansion phase, there is a risk of ceramic single cells being compressed and the glass sealing layer cracking due to stress. After the equipment cools down and contracts, the stacking preload will decrease to a certain extent, which may lead to problems such as slight gas leakage in the cavity, increased contact resistance, and a slight decrease in the overall power generation of the unit.

[0004] Currently, a few solutions use a single stack with independent springs to achieve basic self-tightening buffering. However, most of these solutions only use a combination of springs and ordinary bolts, lacking a complete supporting structure for limiting, torque release, pressure monitoring, and online precise pressure adjustment. Under long-term high-temperature conditions, these solutions have exposed many shortcomings in application.

[0005] (1) There is no online fine-tuning screw adjustment mechanism, and the preload pressure can only be set once during the assembly stage; after the equipment has been running at high temperature for a long time, the spring is prone to slight stress relaxation, and there is no convenient means of secondary pressure compensation.

[0006] (2) Generally, there is no matching limit column or pressure bearing protection structure, which poses a risk of eccentric force; the traditional self-tightening spring is simply sleeved on the outside of the pressure rod, lacking radial limit constraint. During the screw tightening and pressurization process, the spring may be radially offset or tilted, which can easily generate eccentric load.

[0007] (3) There is no supporting independent real-time pressure monitoring structure, and the investigation of pressure anomalies is relatively complicated; the existing single-stack self-tightening structure does not integrate pressure sensing components, and the actual compaction force value of the single stack cannot be obtained intuitively during the equipment operation phase. If there is insufficient pressure or overpressure, it is usually necessary to stop the machine and disassemble it for detection, resulting in low efficiency in fault location and maintenance investigation.

[0008] In summary, the existing rigid clamping solutions for the entire unit and the self-tightening solutions for individual units have many areas for optimization in terms of differentiated pressure regulation, anti-eccentricity protection, online pressure monitoring, and non-destructive independent operation and maintenance. The industry lacks a decoupled pressurization architecture that can simultaneously achieve independent pressure regulation by hand-cranked screws, limit anti-eccentricity, pressure bearing torque relief, high-temperature spring adaptive compensation, and independent pressure monitoring for each unit, which to some extent limits the overall performance of long-term stable operation of multiple SOFC units. Summary of the Invention

[0009] To overcome the aforementioned problems in the prior art, the present invention provides an independent pressurization and monitoring system and pressurization method for SOFC stack modules.

[0010] This invention discloses an independent pressurization and monitoring system for an SOFC fuel cell stack module, comprising a heat-insulated and sealed stack heat box shell, multiple SOFC stacks disposed within the shell, a stack support, and a bottom manifold gas distribution assembly, and a top pressurization assembly; the bottom end of each SOFC stack is sealed and connected to the bottom manifold gas distribution assembly; the top pressurization assembly includes multiple pressurization units corresponding to the number of SOFC stacks, each pressurization unit being disposed above a set of SOFC stacks, and each pressurization unit being independent of each other and without force coupling, with at least four pressurization units; each pressurization unit includes a pressurization support and a hand crank. The system comprises a lead screw, a pressure bearing, a pressure sensor, a limiting post, a high-temperature resistant buffer spring, and a pressure-bearing post. The pressure support is fixed to the top of the heat-insulated and sealed SOFC stack housing. The hand-cranked lead screw is threaded into the pressure support and vertically mounted on it. The lower end of the hand-cranked lead screw is connected to the pressure bearing. Below the pressure bearing, the pressure sensor, the limiting post, the high-temperature resistant buffer spring, and the pressure-bearing post are arranged vertically in sequence. The bottom end of the pressure-bearing post abuts against the top of the corresponding SOFC stack. The limiting post is used to limit the radial displacement of the high-temperature resistant buffer spring. The pressure sensor is used to collect the real-time clamping force on the SOFC stack.

[0011] Based on this, the high-temperature resistant buffer spring is a high-temperature helical compression spring with a spring wire diameter of 3mm to 5mm, a spring mean diameter of 10mm to 20mm, an effective number of coils of 5 to 11, a free length of 40mm to 80mm, and a spring stiffness of 50N / mm to 70N / mm; the two ends of the high-temperature resistant buffer spring are closed and ground flat, and are arranged vertically and coaxially with the pressure-bearing column.

[0012] Based on this, the pressure bearing is located between the hand crank screw and the pressure sensor, isolating the shear torque generated when the hand crank screw rotates, so that the pressure column only transmits vertical clamping force to the SOFC stack.

[0013] Based on this, the pressure sensor is directly arranged between the pressure bearing and the limiting column, or between the pressure-bearing column and the top end plate of the SOFC stack, to collect the stacking clamping force of the corresponding single stack in real time.

[0014] Based on this, the number of SOFC stacks is four, and the top pressurization assembly is equipped with four sets of pressurization units; when the preload is adjusted by operating the hand crank screw of any one set of pressurization units, it has no effect on the pressing state of the other three sets of SOFC stacks.

[0015] Based on this, the bottom manifold gas distribution assembly is provided with a total gas inlet, a total air inlet, a total gas outlet, a total air outlet, and gas inlet and outlet interfaces respectively connected to each group of SOFC stacks; the stack support is used to support the SOFC stack and is fastened to the bottom of the heat-insulated and sealed stack heat box shell.

[0016] Based on this, there are at least two limiting posts, symmetrically distributed on the outside of the high-temperature buffer spring. The top of the limiting post is connected to the pressure sensor or the pressure-bearing post, and the bottom is connected to the pressure-bearing post or the fuel cell support, forming a radial limiting frame for the high-temperature buffer spring.

[0017] Based on this, a hand crank is provided at the top of the hand crank screw. The hand crank is detachably or fixedly connected to the hand crank screw, and is used to manually rotate the hand crank screw to adjust the compression of the high-temperature resistant buffer spring.

[0018] Based on this, the pressure support is a gantry structure or a single plate structure, which is fixed to the top frame of the heat-insulated and sealed electric stack heat box shell by bolts, and has threaded holes that match the hand crank screw.

[0019] Based on this, the pressure-bearing column is a stepped shaft structure, with its upper diameter being larger than its lower diameter, and the high-temperature resistant buffer spring is sleeved on the lower end of the pressure-bearing column.

[0020] Based on this, the signal output terminal of the pressure sensor is connected to an external display and control unit, which is used to display the pressure values ​​of each pile in real time and issue an alarm when the pressure is abnormal.

[0021] Based on this, the high-temperature buffer spring is made of heat-resistant alloy steel, which can maintain stable elastic performance in a temperature environment of 300℃ to 800℃.

[0022] Based on this, the SOFC stack is a planar solid oxide fuel cell stack, which is composed of multiple individual cells, connectors and seals stacked together.

[0023] Another aspect of the present invention discloses a pressurization method for an independent pressurization and monitoring system of an SOFC stack module, comprising the following steps:

[0024] S1: Place multiple SOFC stacks sequentially on the stack support and fix them in place, and complete the sealing connection of the bottom gas interface;

[0025] S2: Install multiple independent pressurization units corresponding to each SOFC stack at the top frame position of the heat-insulated and sealed stack heat box shell;

[0026] S3: Operate the hand crank screw of each pressurization unit separately to independently adjust the initial pre-compression of each SOFC stack, and read the single stack clamping force in real time through the matching pressure sensor until it is adjusted to the design pressure range;

[0027] S4: During system operation, the pressure of each stack is monitored in real time by pressure sensors. When the pressure of a certain stack decreases due to thermal relaxation, the corresponding hand crank screw is operated individually to perform online pressure replenishment.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. Multi-stack completely independent pressurization architecture, differentiated adaptation to assembly tolerances and thermal deformation differences. Compared with the traditional overall pressure plate clamping mode, each stack is equipped with an independent screw pressurization system, which can set the initial preload individually to adapt to the assembly height tolerance of each stack. Combined with independent fixed-value high-temperature springs, it realizes differentiated compensation for thermal deformation of a single stack, solving the industry pain points of uneven pressure and single stack attenuation under multi-stack series and parallel operation.

[0030] 2. The combination of limit posts and pressure bearings provides protection and reduces the risk of damage caused by eccentricity and shear stress. The limit posts restrict the radial displacement of the springs and pressure bearings, while the pressure bearings isolate the rotational shear torque of the lead screw. This dual protection structure reduces the possibility of cracking of the ceramic battery and glass sealing layer due to eccentric stress. Compared with the simple single-stack self-tightening structure without protection, it helps to extend the service life of the fuel cell stack during thermal cycles.

[0031] 3. Independent online pressure monitoring for each stack provides greater convenience for operation and maintenance than traditional sensorless self-tightening solutions. Each pressurization unit is equipped with a dedicated pressure sensor, which can collect the corresponding single stack clamping force in real time, making it easy to quickly locate stacks with abnormal pressure and adjust the pressure individually during equipment downtime. Traditional single-stack self-tightening lacks monitoring methods, and fault diagnosis and pressure adjustment usually require the entire unit to be shut down and disassembled, resulting in relatively lower overall operation and maintenance efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a single independent pressurization unit of the present invention;

[0033] Figure 2This is a schematic diagram of the overall layout of the top pressurization assembly of the present invention;

[0034] Figure 3 This is a schematic diagram of the assembly of the fuel cell stack and fuel cell stack support inside the hot box of the present invention;

[0035] Figure 4 This is a schematic diagram of the electric stack thermal box structure of the present invention;

[0036] In the diagram: 1. Insulated and sealed fuel cell stack housing, 2. SOFC fuel cell stack, 3. Fuel cell stack support, 4. Bottom manifold gas distribution assembly, 5. Top pressurization assembly, 6. Pressurization unit, 7. Pressurization support, 8. Hand crank screw, 9. Pressure bearing, 10. Pressure sensor, 11. Limiting post, 12. High-temperature resistant buffer spring, 13. Pressure bearing post, 14. Hand crank. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0038] Example 1

[0039] refer to Figures 1-4 This embodiment provides an independent pressurization and monitoring system for an SOFC stack module, including a heat-insulated and sealed stack hot box shell 1, multiple SOFC stacks 2 disposed within the shell, a stack support 3, and a bottom manifold gas distribution assembly 4, and a top pressurization assembly 5 disposed at the top.

[0040] The SOFC stack 2 is a planar solid oxide fuel cell stack, internally composed of multiple individual cells, connectors, and seals stacked together. In this embodiment, there are four SOFC stacks 2 arranged in an array. The stack support 3 supports the SOFC stacks 2 and is securely connected to the bottom of the heat-insulated and sealed stack housing 1 using bolts and other fasteners. The bottom manifold gas distribution assembly 4 has a total gas inlet, a total air inlet, a total gas outlet, a total air outlet, and gas inlet / outlet interfaces corresponding to each SOFC stack 2. During installation, the bottom end of the SOFC stack 2 is sealed and connected to the bottom manifold gas distribution assembly 4 to complete the connection of the bottom gas path.

[0041] The top pressurization assembly 5 includes four pressurization units 6 corresponding to the number of SOFC stacks 2. Each pressurization unit 6 is positioned directly above a set of SOFC stacks 2, and each pressurization unit 6 is independent of each other and has no force coupling. This decoupling design ensures that adjusting the preload of any one pressurization unit 6 does not affect the pressurization status of the other three sets of SOFC stacks 2, enabling independent maintenance and pressure regulation of a single stack.

[0042] Each pressurization unit 6 includes a pressurization bracket 7, a hand crank screw 8, a pressure bearing 9, a pressure sensor 10, a limit post 11, a high-temperature resistant buffer spring 12, and a pressure-bearing post 13.

[0043] The pressure support 7 is fixed to the top frame of the insulated and sealed electric stack heat box shell 1. Specifically, it can adopt a gantry frame structure or a single plate structure and be fixed with bolts. The hand crank 8 is vertically installed on the pressure support 7 and is threaded into the threaded hole on the pressure support 7. The top of the hand crank 8 is provided with a hand crank 14 for manually rotating the screw.

[0044] The lower end of the hand-cranked screw 8 is connected to the pressure bearing 9. Below the pressure bearing 9, the pressure sensor 10, the limiting post 11, the high-temperature resistant buffer spring 12, and the pressure-bearing post 13 are arranged vertically in sequence. The bottom end of the pressure-bearing post 13 abuts against the top end plate of the corresponding SOFC stack 2.

[0045] The pressure bearing 9 is located between the hand crank screw 8 and the pressure sensor 10 to isolate the shear torque generated when the hand crank screw 8 rotates, ensuring that only the vertical clamping force is transmitted downwards, thus protecting the fuel cell from torque damage.

[0046] Pressure sensor 10 is directly arranged between pressure bearing 9 and limiting post 11 (or between pressure bearing post and fuel cell stack) to collect the stacking clamping force of a single stack in real time. The signal output terminal of pressure sensor 10 is connected to an external display and control unit 15 to display the pressure value in real time and to trigger an alarm in case of abnormality. There are at least two limiting posts 11, symmetrically distributed on the outside of high-temperature buffer spring 12, forming a radial limiting frame to limit the radial displacement of high-temperature buffer spring 12 during compression and prevent eccentric force.

[0047] The pressure-bearing column 13 can adopt a stepped shaft structure. A high-temperature resistant buffer spring 12 is sleeved on the lower outer end of the pressure-bearing column 13. The high-temperature resistant buffer spring 12 is a high-temperature helical compression spring made of heat-resistant alloy steel, capable of maintaining stable elastic performance in temperatures ranging from 300℃ to 800℃. Its optimal parameter configuration is: spring wire diameter 4.0mm, spring mean diameter 15mm, effective number of turns 8, free length 60mm, assembly pre-compression 26mm, and spring stiffness 60N / mm. Both ends of the spring are closed and ground flat, and it is arranged vertically and coaxially with the pressure-bearing column 13.

[0048] Four independent hand-cranked screw pressurization units 8 can be used to set the initial preload for each of the four SOFC stacks 2, adapting to the assembly height tolerance of each stack. Combined with independently set high-temperature resistant buffer springs 12, differentiated compensation for thermal deformation of a single stack can be achieved, solving the industry pain point of uneven pressure under multi-stack series-parallel operation. The limiting post 11 restricts the radial offset of the spring and pressure-bearing post, and the pressure bearing 9 isolates the shear torque of the screw rotation. This dual-protection structure effectively reduces the risk of cracking of the ceramic battery and glass sealing layer under off-center stress, extending the lifespan of the stack through thermal cycling.

[0049] Each pressurization unit is equipped with a dedicated pressure sensor 10, which can acquire the actual compaction force of a single pile in real time. When the pressure of a pile decreases due to thermal relaxation during system operation, maintenance personnel can quickly locate the location through the external display and control unit, and operate the corresponding hand crank screw 8 to replenish pressure online without stopping the machine for disassembly, which significantly improves maintenance efficiency.

[0050] Example 2

[0051] This embodiment provides a pressurization method based on the above-mentioned SOFC multi-stacking module integrated heat box, including the following steps:

[0052] S1: Place multiple SOFC stacks 2 sequentially on the stack support 3 and fix them in place to complete the sealed connection between the bottom gas interface and the bottom manifold gas distribution assembly 4.

[0053] S2: Install multiple independent pressurization units 6 corresponding to each SOFC stack 2 at the top frame position of the heat-insulated and sealed stack heat box shell 1.

[0054] S3: Operate the hand crank screw 8 of each pressurization unit 6 to independently adjust the initial pre-compression of each SOFC stack 2, and read the single stack clamping force in real time through the matching pressure sensor 10 until it is adjusted to the design pressure range (for example, set the target pressure according to the spring stiffness of 60N / mm and the pre-compression amount of 26mm).

[0055] S4: During system operation, the pressure of each stack is monitored in real time by pressure sensor 10. When a pressure drop in a stack is detected due to thermal relaxation, the corresponding hand crank screw 8 is operated individually to perform online pressure replenishment and restore the pressure to the design pressure range.

[0056] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw-in," "pad," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An independent pressurization and monitoring system for an SOFC fuel cell stack module, comprising a heat-insulated and sealed stack heat box shell (1), multiple SOFC stacks (2) disposed within the shell, a stack support (3), and a bottom manifold gas distribution assembly (4), characterized in that, It also includes the top pressurization assembly (5); The bottom end of the SOFC stack (2) is sealed and connected to the bottom manifold gas distribution assembly (4); the top pressurization assembly (5) includes multiple pressurization units (6) corresponding to the number of SOFC stacks (2), each pressurization unit (6) is disposed above a set of SOFC stacks (2), and each pressurization unit (6) is independent of each other and has no force coupling, and there are at least four pressurization units (6); Each pressurizing unit (6) includes a pressurizing bracket (7), a hand crank screw (8), a pressure bearing (9), a pressure sensor (10), a limiting post (11), a high-temperature resistant buffer spring (12), and a pressure-bearing post (13). The pressure bracket (7) is fixed to the top of the heat-insulated and sealed fuel cell stack housing (1). The hand crank screw (8) is threaded into the pressure bracket (7) and vertically installed on the pressure bracket (7). The lower end of the hand crank screw (8) is connected to the pressure bearing (9). The pressure sensor (10), the limiting post (11), the high-temperature resistant buffer spring (12), and the pressure-bearing post (13) are arranged vertically below the pressure bearing (9). The bottom end of the pressure-bearing post (13) abuts against the top end of the corresponding SOFC fuel cell stack (2). The limiting post (11) is used to limit the radial displacement of the high-temperature resistant buffer spring (12). The pressure sensor (10) is used to collect the real-time clamping force on the SOFC fuel cell stack (2).

2. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The high-temperature resistant buffer spring (12) is a high-temperature helical compression spring with a spring wire diameter of 3mm to 5mm, a spring middle diameter of 10mm to 20mm, an effective number of coils of 5 to 11, a free length of 40mm to 80mm, and a spring stiffness of 50N / mm to 70N / mm. The two ends of the high-temperature resistant buffer spring (12) are closed and ground flat, and are arranged vertically and coaxially with the pressure column (13).

3. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The pressure bearing (9) is located between the hand crank screw (8) and the pressure sensor (10), isolating the shear torque generated when the hand crank screw (8) rotates, so that the pressure column (13) transmits vertical clamping force only to the SOFC stack (2).

4. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The pressure sensor (10) is directly arranged between the pressure bearing (9) and the limiting column (11), or between the pressure-bearing column (13) and the top end plate of the SOFC stack (2), to collect the stacking clamping force of the corresponding single stack in real time.

5. The independent pressurization and monitoring system for SOFC stack modules according to claim 1, characterized in that, The number of SOFC stacks (2) is four, and the top pressurization assembly (5) is equipped with four sets of pressurization units (6); when the preload is adjusted by operating the hand crank screw (8) of any one set of pressurization units (6), it has no effect on the pressing state of the other three sets of SOFC stacks (2).

6. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The bottom manifold gas distribution assembly (4) is provided with a total gas inlet, a total air inlet, a total gas outlet, a total air outlet, and gas inlet / outlet interfaces respectively connected to each group of SOFC stacks (2); the stack support (3) is used to support the SOFC stack (2) and is fastened to the bottom of the heat-insulated and sealed stack heat box shell (1).

7. The independent pressurization and monitoring system for SOFC stack modules according to claim 1, characterized in that, The limiting posts (11) are at least two, symmetrically distributed on the outside of the high-temperature buffer spring (12). The top of the limiting posts (11) is connected to the pressure sensor (10) or the pressure-bearing post (13), and the bottom is connected to the pressure-bearing post (13) or the fuel cell support (3), forming a radial limiting frame for the high-temperature buffer spring (12).

8. The independent pressurization and monitoring system for SOFC stack modules according to claim 1, characterized in that, The top of the hand crank screw (8) is provided with a hand crank handle (14), which is detachably or fixedly connected to the hand crank screw (8) for manually rotating the hand crank screw (8) to adjust the compression of the high temperature resistant buffer spring (12).

9. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The pressurizing bracket (7) is a gantry structure or a single plate structure, and is fixed to the top frame of the heat-insulated and sealed electric stack heat box shell (1) by bolts. It has a threaded hole that matches the hand crank screw (8).

10. The independent pressurization and monitoring system for SOFC stack modules according to claim 1, characterized in that, The pressure-bearing column (13) has a stepped shaft structure, with its upper diameter being larger than its lower diameter. The high-temperature resistant buffer spring (12) is sleeved on the lower outside of the pressure-bearing column (13).

11. The independent pressurization and monitoring system for SOFC stack modules according to claim 1, characterized in that, The signal output terminal of the pressure sensor (10) is connected to an external display and control unit (15), which is used to display the pressure value of each pile in real time and issue an alarm when the pressure is abnormal.

12. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The high-temperature buffer spring (12) is made of heat-resistant alloy steel, which can maintain stable elastic performance in a temperature environment of 300℃ to 800℃.

13. The independent pressurization and monitoring system for the SOFC stack module according to claim 1, characterized in that, The SOFC stack (2) is a planar solid oxide fuel cell stack, which is composed of multiple single cells, connectors and seals stacked inside.

14. A pressurization method for an independent pressurization and monitoring system for an SOFC stack module as described in any one of claims 1-13, characterized in that, Includes the following steps: S1: Place multiple SOFC stacks (2) sequentially on the stack support (3) and fix them in place to complete the sealing connection of the bottom gas path interface; S2: Install multiple independent pressurization units (6) corresponding to each SOFC stack (2) at the top frame position of the heat-insulated and sealed stack heat box shell (1); S3: Operate the hand crank screw (8) of each pressurization unit (6) to independently adjust the initial pre-compression of each SOFC stack (2), and read the single stack clamping force in real time through the matching pressure sensor (10) until it is adjusted to the design pressure range; S4: During system operation, the pressure of each stack is monitored in real time by the pressure sensor (10). When the pressure of a certain stack decreases due to thermal relaxation, the corresponding hand crank screw (8) is operated separately to perform online pressure replenishment.

Images