Pressure control device, method, solid fuel cell system, and control device

Abstract

The invention relates to a pressure control device and method, a solid fuel cell system and a control device. The pressure control device comprises control equipment, a buffer container and pressure adjusting equipment, the control equipment is used for acquiring pressure fluctuation information and temperature information of a working medium in the solid fuel cell system and determining a control mode of the pressure control device according to the pressure fluctuation information and the temperature information; and the pressure adjusting equipment is used for controlling the pressure of the working medium flowing through the buffer container in the solid fuel cell system based on the control mode under the control of the control equipment. In the embodiment of the invention, due to the addition of the buffer container in the solid fuel cell system, when the pressure of the working medium in the solid fuel cell system fluctuates, the inherent space provided by the buffer container can provide a certain amount of buffer capacity, so that the pressure fluctuation is buffered. And the pressure of the working medium flowing through the buffer container can be controlled by controlling the pressure adjusting equipment, so that a pressure fluctuation inhibiting effect is achieved.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a pressure control device, method, solid fuel cell system and control equipment. Background Art

[0002] The solid oxide fuel cell system can directly convert the chemical energy of the fuel in the solid oxide fuel cell into electrical energy and thermal energy at an operating temperature of 600-800°C, where the fuel can be different gas sources such as hydrogen, biomass gas, natural gas, and biogas. In addition to fuel, the solid oxide fuel cell system also requires two working fluids, water and air. The hot zone auxiliary device of the solid oxide fuel cell system is used to convert the three working fluids of fuel, air and water into the components and environment required for the stack device to generate electricity. The stack device directly converts the chemical energy in the converted working fluid into electrical energy and thermal energy under the conditions of temperature, catalyst, etc.

[0003] Since the hot zone auxiliary device needs to convert liquid water into high-temperature steam of a certain temperature, and it is often difficult to achieve stable and accurate water supply control at low flow rates, it is easy to cause pressure fluctuations in the solid oxide fuel cell system. If the pressure fluctuation is too large, it will greatly affect the life of the stack device, thereby affecting the life of the entire solid oxide fuel cell system. Summary of the invention

[0004] Based on this, it is necessary to provide a pressure control device, method, solid fuel cell system and control equipment that can reduce the pressure fluctuation of the solid oxide fuel cell system in order to address the above technical problems.

[0005] In a first aspect, the present application provides a pressure control device, the pressure control device comprising a control device, a buffer container and a pressure regulating device; the control device is in communication connection with the pressure regulating device;

[0006] The control device is used to obtain pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system, and determine the control mode of the pressure control device according to the pressure fluctuation information and temperature information;

[0007] The pressure regulating device is used to control the pressure of the working fluid flowing through the buffer container in the solid fuel cell system based on the control mode under the control of the control device.

[0008] In one of the embodiments, the pressure control device further comprises a buffer membrane disposed in the buffer container, and a plurality of buffer holes are disposed on the buffer membrane;

[0009] The buffer membrane is used to divide the space of the buffer container into two buffer spaces, and adjust the volumes of the two buffer spaces based on the plurality of buffer holes.

[0010] In one of the embodiments, the pressure regulating device comprises a plurality of heating components, and the heating components are disposed in the buffer container;

[0011] The plurality of heating components are used to heat the working fluid flowing through the buffer container under the control of the control device.

[0012] In one embodiment, the pressure regulating device comprises a cooling module, the cooling module comprises a cooling component, a switch component, a power component and a coolant container; the cooling component is arranged in the buffer container, and the switch component, the power component and the coolant container are arranged outside the buffer container;

[0013] The power assembly is used to obtain coolant from the coolant container under the control of the control device, and to deliver the coolant to the cooling assembly through the switch assembly;

[0014] The cooling component is used to cool the working medium flowing through the buffer container by using the coolant.

[0015] In one embodiment, the pressure control device further comprises a heat preservation box and a high-temperature penetration member penetrating the heat preservation box, and the heat preservation box is wrapped around the outer periphery of the buffer container;

[0016] The high temperature penetration piece is used to connect the components inside and outside the heat preservation box.

[0017] In a second aspect, the present application provides a pressure control method, comprising:

[0018] Obtain pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system;

[0019] determining a control mode of the pressure control device according to the pressure fluctuation information and the temperature information;

[0020] The pressure of the working fluid flowing through the buffer container in the solid fuel cell system is controlled according to the control mode.

[0021] In one embodiment, determining the control mode of the pressure control device according to the pressure fluctuation information and the temperature information includes:

[0022] If the pressure fluctuation information is less than a first preset pressure threshold, and the temperature information is within a first preset temperature range, the control mode is determined to be a first control mode; the first control mode includes any one of a passive control mode, a heat control mode, and a cold control mode;

[0023] If the pressure fluctuation information is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, and the temperature information is in the second preset temperature range, then the control mode is determined to be the second control mode; the first preset temperature range and the second preset temperature range do not completely overlap; or,

[0024] If the pressure fluctuation information is greater than the second preset pressure threshold and less than the third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature range, the control mode is determined to be the second control mode; the second control mode includes the hot control mode or the cold control mode.

[0025] In one embodiment, controlling the pressure of the working fluid in the solid fuel cell system according to the control mode includes:

[0026] When the control mode is the thermal control mode, a heating component is used to heat the working fluid flowing through the buffer container to control the pressure of the working fluid in the solid fuel cell system.

[0027] In one embodiment, controlling the pressure of the working fluid in the solid fuel cell system according to the control mode includes:

[0028] When the control mode is the cold control mode, a cooling module is used to cool the working medium flowing through the buffer container to control the pressure of the working medium in the solid fuel cell system.

[0029] In a third aspect, the present application further provides a control device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the method steps provided in the second aspect when executing the computer program.

[0030] In a fourth aspect, the present application further provides a solid fuel cell system, the system comprising a hot zone auxiliary device, a fuel cell stack device and a pressure control device as described in the first aspect, wherein the pressure control device is arranged between the hot zone auxiliary device and the fuel cell stack device.

[0031] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method steps provided in the second aspect above.

[0032] In a sixth aspect, the present application further provides a computer program product, including a computer program, which implements the method steps provided in the second aspect when executed by a processor.

[0033] The above-mentioned pressure control device, method, solid fuel cell system and control device, the pressure control device includes a control device, a buffer container and a pressure regulating device; the control device is connected to the pressure regulating device in communication; the control device is used to obtain the pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system, and determine the control mode of the pressure control device according to the pressure fluctuation information and temperature information; the pressure regulating device is used to control the pressure of the working fluid flowing through the buffer container in the solid fuel cell system based on the control mode under the control of the control device. In the embodiment of the present application, due to the increase of the buffer container in the solid fuel cell system, when the pressure of the working fluid in the solid fuel cell system fluctuates, the inherent space provided by the buffer container can provide a certain amount of buffer capacity, thereby achieving the containment and buffering of the pressure fluctuation, and playing a non-active pressure fluctuation suppression role to a certain extent. Moreover, the pressure of the working fluid flowing through the buffer container can also be controlled by controlling the pressure regulating device, which plays an active pressure fluctuation suppression role. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] FIG1 is a structural block diagram of a pressure control device in one embodiment;

[0036] FIG2 is a schematic flow chart of a pressure control method in one embodiment;

[0037] FIG3 is a structural block diagram of a pressure control device in another embodiment;

[0038] FIG4 is a schematic flow chart of a pressure control method in another embodiment;

[0039] FIG5 is a schematic flow chart of a pressure control method in another embodiment;

[0040] FIG. 6 is a diagram showing the internal structure of a control device in one embodiment.

[0041] Description of reference numerals:

[0042] 00. Server; 01. Pressure control device;

[0043] 11. Control equipment; 12. Buffer container; 13. Pressure regulating equipment;

[0044] 14. Buffer film; 141. Buffer hole; 131. Heating component;

[0045] 132. Cooling module; 1321. Cooling assembly; 1322. Switch assembly;

[0046] 1323. Power assembly; 1324. Coolant container; 15. Insulated hot box;

[0047] 16. High-temperature penetration piece; 121. Container inlet; 122. Container outlet. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] Figure 1 is a schematic diagram of a pressure control device in an embodiment. As shown in Figure 1, the pressure control device 01 includes a control device 11, a buffer container 12 and a pressure regulating device 13; the control device 11 is communicatively connected with the pressure regulating device 13; the control device 11 is used to obtain pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system, and determine the control mode of the pressure control device 01 according to the pressure fluctuation information and temperature information; the pressure regulating device 13 is used to control the pressure of the working fluid flowing through the buffer container 12 in the solid fuel cell system based on the control mode under the control of the control device.

[0054] Since the working fluids such as fuel, water and air required by the solid oxide fuel cell system need to be heated from low temperature to high temperature and work under high temperature conditions. The solid oxide fuel cell system operates at a high temperature of 600-800°C and a low pressure of no more than 10kPa. Once the working fluids such as water and fuel fail to achieve high-precision stable supply at low flow, the thermal balance of the solid oxide fuel cell system will be broken, which will cause the solid oxide fuel cell system to produce pressure fluctuation problems. If there are large pressure fluctuations in the solid oxide fuel cell system, it may cause the stack device in the solid oxide fuel cell system to degrade and decay prematurely, thereby affecting the overall life of the solid oxide fuel cell system. According to the ideal gas state equation, the change in pressure is affected by volume and temperature. Therefore, the pressure of the working fluid can be controlled by changing the temperature of the working fluid in the buffer container 12 and the volume of the environment in which the working fluid is located.

[0055] In the embodiment of the present application, as shown in FIG1 , the pressure control device 01 includes a control device 11, a buffer container 12 and a pressure regulating device 13, and the buffer container 12 is used to contain a working medium. When a working medium with a certain temperature enters the buffer container 12 from the container inlet 121 of the buffer container 12, it flows out from the container inlet 121. Since the buffer container 12 has a certain volume compared to the transmission pipeline between the heating auxiliary device and the stack device in the solid fuel cell system in the conventional technology, when the pressure of the working medium in the solid fuel cell system changes, the inherent space of the buffer container 12 can provide a certain amount of buffer capacity, thereby realizing pressure control.

[0056] Furthermore, the temperature of the working fluid can be adjusted by the pressure regulating device 13 to control the pressure of the working fluid flowing through the buffer container 12, so that the pressure of the working fluid in the solid oxide fuel cell system does not fluctuate.

[0057] The control device 11 can be connected to the pressure regulating device 13 for communication. On the one hand, the sensor system collects the pressure fluctuation information and temperature information of the working fluid in the solid oxide fuel cell system, and sends the pressure fluctuation information and temperature information to the control device 11, that is, the control device 11 can directly obtain the pressure fluctuation information and temperature information of the working fluid in the solid oxide fuel cell system from the sensor system. On the other hand, the sensor system collects the pressure fluctuation information and temperature information of the working fluid in the solid oxide fuel cell system, and sends the pressure fluctuation information and temperature information to the server 00 in the solid fuel cell system. The control device 11 directly obtains the pressure fluctuation information and temperature information from the server 00, avoiding changes to the original circuit structure in the solid fuel cell system.

[0058] As shown in FIG. 2, in the first case, when the solid oxide fuel cell system is not in operation or there is no pressure fluctuation, it is assumed that the pressure fluctuation information detected by the solid oxide fuel cell system does not exceed Pk0 (Pk0 is less than the first preset pressure threshold), and there is no need to perform pressure regulation control. When the pressure fluctuation information of the solid oxide fuel cell system continues to increase, but the pressure fluctuation information does not exceed the first preset pressure threshold Pk1, because the pressure fluctuation causes less damage to the stack device in the solid oxide fuel cell system, the solid oxide fuel cell system has a higher tolerance for pressure fluctuations, and the pressure control device 01 operates in the first control mode. It can be seen that when the pressure fluctuation information does not exceed Pk0 and does not exceed Pk1, the control mode of the pressure control device 01 is consistent. Therefore, if the pressure fluctuation information is less than the first preset pressure threshold, and the temperature information is in the first preset temperature interval (t11-t12), the control mode is determined to be the first control mode. In the first control mode, since the pressure fluctuation is small, the pressure of the working fluid can be passively controlled through the inherent volume of the buffer container 12; the pressure of the working fluid can also be actively controlled through the pressure regulating device 13, that is, the first control mode can be a passive control mode, a thermal control mode, or a cold control mode.

[0059] Optionally, the first preset pressure threshold Pk1 may be a typical value such as 2000Pa, 3000Pa, etc., and the first preset temperature range of the working fluid may be 100°C-300°C.

[0060] The second case: the pressure fluctuation information of the working fluid of the solid oxide fuel cell system continues to increase. When the pressure fluctuation information exceeds the first preset pressure threshold value Pk1 and is less than the second preset pressure threshold value Pk2, the operating condition of the solid oxide fuel cell system is relatively complex and there is a possibility of oscillation. If the temperature information is in the second preset temperature interval of the solid oxide fuel cell system in the start-up temperature rise process, or the solid oxide fuel cell system is unstable and drops from the high thermal power operation state to the low thermal power operation state, the possibility of pressure fluctuation and oscillation is relatively high. Therefore, if the pressure fluctuation information is greater than or equal to the first preset pressure threshold value, less than the second preset pressure threshold value, and the temperature information is in the second preset temperature interval (t21-t22), it is determined that the control mode is the second control mode. At this time, the control device 11 needs to automatically switch the operation mode to the second control mode, and use the pressure regulating device 13 to adjust the temperature of the working fluid flowing through the buffer container 12 to control the pressure of the working fluid. Optionally, the second control mode can be a thermal control mode or a cold control mode. Since the pressure of the working fluid of the solid oxide fuel cell system continues to increase in this case, it is common that the second control mode in this case is a thermal control mode.

[0061] Optionally, the second preset pressure threshold Pk2 may be 4500 Pa, and the second preset temperature interval may be an interval around the boiling point, for example, the second preset temperature interval is 80°C-150°C, or 80°C-120°C.

[0062] The third case: When the pressure fluctuation information of the working fluid in the solid oxide fuel cell system is greater than the second preset pressure threshold value Pk2, the possibility of continued deterioration of the pressure fluctuation is relatively high. When the temperature information of the working fluid in the solid oxide fuel cell system is greater than the maximum value of the first preset temperature interval, the solid oxide fuel cell system is in high thermal power operation. If the heat balance is unstable, the amount of working fluid provided will deviate. Therefore, if the pressure fluctuation information is greater than the second preset pressure threshold value, less than the third preset pressure threshold value, and the temperature information is greater than the maximum value of the first preset temperature interval, it is determined that the control mode is also the second control mode, and the control device automatically switches the operation mode to the second control mode, and uses the pressure regulating device 13 to adjust the temperature of the working fluid flowing through the buffer container 12 to control the pressure of the working fluid. Optionally, the second control mode in this case can be a cold control mode or a hot control mode.

[0063] Optionally, the third preset pressure threshold Pk3 may be 6000 Pa, and the maximum value t12 of the first preset temperature interval may be 300° C.

[0064] Optionally, the control device 11 may be arranged outside the buffer container 12, the pressure regulating device 13 may be arranged inside the buffer container 12, or some components of the pressure regulating device 13 may be arranged inside the buffer container 12, and some components may be arranged outside the buffer container 12. Since the pressure regulating device 13 adjusts the temperature of the working fluid flowing through the buffer container 12, the pressure regulating device 13 may include a heating module and / or a cooling module, the heating module may be a heating component, and the cooling module may be a coolant circulation system, an isolation condenser, etc.

[0065] It should be noted that, in order to ensure the stability of the pressure control of the working fluid, the control device 11 reduces the delay time as much as possible when switching the mode. For example, the switching time delay does not exceed 1 minute.

[0066] In the embodiment of the present application, the pressure control device includes a control device, a buffer container and a pressure regulating device; the control device is connected to the pressure regulating device in communication; the control device is used to obtain the pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system, and determine the control mode of the pressure control device according to the pressure fluctuation information and temperature information; the pressure regulating device is used to control the pressure of the working fluid flowing through the buffer container in the solid fuel cell system based on the control mode under the control of the control device. In the embodiment of the present application, due to the increase of the buffer container in the solid fuel cell system, when the pressure of the working fluid in the solid fuel cell system fluctuates, the inherent space provided by the buffer container can provide a certain amount of buffer capacity, thereby achieving the containment and buffering of the pressure fluctuation, and playing a non-active pressure fluctuation suppression role to a certain extent. Moreover, the pressure of the working fluid flowing through the buffer container can also be controlled by controlling the pressure regulating device, which plays an active pressure fluctuation suppression role.

[0067] Figure 3 is a schematic diagram of a pressure control device in another embodiment. As shown in Figure 3, the pressure control device also includes a buffer membrane 14 arranged in the buffer container 12, and a plurality of buffer holes 141 are arranged on the buffer membrane 14; the buffer membrane 14 is used to divide the space of the buffer container 12 into two buffer spaces, and adjust the volumes of the two buffer spaces based on the plurality of buffer holes 141.

[0068] In an embodiment of the present application, as shown in Figure 3, a buffer membrane 14 with a certain degree of freedom is provided in the buffer container 12, and a plurality of micro-release buffer holes 141 are provided on the buffer membrane 14, so that the buffer space on the right side of the buffer membrane 14 is a non-sealed space, and the spatial pressure on the right side of the buffer membrane 14 can be properly released, so that the right side of the buffer membrane 14 will not be over-pressurized during the heating of the solid fuel cell system.

[0069] When the working fluid enters the buffer container 12 through the container inlet 121 and the pressure on the left side of the buffer container 12 changes, the deformation of the buffer membrane 14 occurs automatically. Through the deformation of the buffer membrane 14, the pressure of the two buffer spaces on the left and right sides of the buffer container 12 can be adjusted, so that the pressure control device 01 has the ability to automatically adjust without the need for external energy.

[0070] Since the control of the pressure by the buffer film 14 is a passive control and has a natural pressure buffering and regulating capability, the buffer film 14 can play a role in pressure control in any control mode. Preferably, in the first control mode, since the pressure fluctuation is small, only the buffer film 14 can be used to control the pressure, that is, the passive control mode in the first control mode can be that the inherent space of the buffer container 12 provides a certain amount of buffer capacity to passively control the pressure, or it can be based on the buffer container 12 and use the buffer film 14 to passively control the pressure.

[0071] Furthermore, the pressure regulating device 13 includes a plurality of heating components 131 , which are disposed in the buffer container 12 ; the plurality of heating components 131 are used to heat the working fluid flowing through the buffer container 12 under the control of the control device 11 .

[0072] Continuing as shown in FIG. 3 above, the control device 11 obtains the temperature information and pressure fluctuation information of the working fluid from the server 00, and after determining the control mode based on the temperature information and the pressure fluctuation information, automatically switches the control mode to the thermal control mode. At this time, in order to meet the needs of thermal balance and pressure balance, the control device automatically calculates the number of heating components 131 that need to be put into use, and controls the corresponding number of heating components 131 to be put into use. With the input of the heating components 131, the working fluid in the buffer container 12 is automatically heated, thereby gradually increasing the temperature of the working fluid, forming a new thermal balance, and thus realizing the control of the working fluid pressure.

[0073] Furthermore, the pressure regulating device 13 includes a cooling module 132, and the cooling module 132 includes a cooling component 1321, a switch component 1322, a power component 1323 and a coolant container 1324; the cooling component 1321 is arranged in the buffer container 12, and the switch component 1322, the power component 1323 and the coolant container 1324 are arranged outside the buffer container 12; the power component 1323 is used to obtain coolant from the coolant container 1324 under the control of the control device 11, and to transport the coolant to the cooling component 1321 through the switch component 1322; the cooling component 1321 is used to cool the working fluid flowing through the buffer container 12 by means of the coolant.

[0074] Continuing as shown in FIG. 3 above, after the control mode is determined based on the temperature information and the pressure fluctuation information, the control mode is automatically switched to the cold control mode. In order to meet the needs of thermal balance and pressure balance, the control device 11 automatically calculates the flow rate of the coolant that needs to be invested. The control device 11 controls the switch assembly 1322 to open, and extracts the coolant from the coolant container 1324 through the power assembly 1323 and transmits it to the cooling assembly 1321. At this time, the working fluid in the buffer container 12 is automatically cooled, thereby realizing the control of the working fluid pressure of the solid oxide fuel cell system.

[0075] It should be noted that, according to the above analysis, the passive control mode is realized by utilizing the inherent space of the buffer container 12 and the deformation of the buffer film 14. Therefore, the heat control mode and the cold control mode of the present application are substantially accompanied by the passive control mode. Since the control effect of the passive control mode on pressure fluctuations is smaller than that of the heat control mode or the cold control mode on pressure fluctuations, in order to simplify the description, the passive control mode is not reflected in the analysis of the heat control mode or the cold control mode in the embodiments of the present application.

[0076] In the embodiment of the present application, two pressure control modes, active and passive, are set up through a buffer membrane and a pressure regulating device. It can work under special conditions of high temperature and low pressure, and can effectively control the pressure stability of the solid oxide fuel cell system, slow down or even completely eliminate the system pressure fluctuations, thereby improving the service life of the solid oxide fuel cell system.

[0077] In one embodiment, as shown in FIG. 3 above, the pressure control device further includes a heat-insulating box 15 and a high-temperature penetration piece 16 penetrating the heat-insulating box 15 . The heat-insulating box 15 is wrapped around the buffer container 12 . The high-temperature penetration piece 16 is used to connect the components inside and outside the heat-insulating box 15 .

[0078] In the embodiment of the present application, since the operating temperature of the solid oxide fuel cell system is 600-800°C, the buffer container 12 can be set in the thermal insulation box 15, and the components outside the thermal insulation box 15 located in the normal temperature environment can be connected to the components in the buffer container 12 located in the high temperature environment through the high-temperature penetration piece 16.

[0079] Optionally, the components located inside the heat preservation box 15 include a heating component 131 and a cooling component 1321, and the components located outside the heat preservation box include a switch component 1322, a power component 1323, a coolant container 1324 and a control device 11, etc.

[0080] In an exemplary embodiment, as shown in FIG4 , a pressure control method is provided, which is described by taking the method applied to the control device in FIG1 as an example, and includes the following S201 to S203. Among them:

[0081] S201, obtaining pressure fluctuation information and temperature information of a working fluid in a solid fuel cell system.

[0082] S202, determining a control mode of the pressure control device according to the pressure fluctuation information and the temperature information.

[0083] S203, controlling the pressure of the working fluid flowing through the buffer container in the solid fuel cell system according to the control mode.

[0084] For specific implementation methods, please refer to the embodiments corresponding to Figures 1 to 3 above.

[0085] In the above pressure control method, the pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system are obtained, and the control mode of the pressure control device is determined according to the pressure fluctuation information and the temperature information, and the pressure of the working fluid flowing through the buffer container in the solid fuel cell system is controlled according to the control mode. In the embodiment of the present application, after the pressure fluctuation information and the temperature information are obtained, the control mode of the pressure control device is determined based on the pressure fluctuation information and the temperature information, and the pressure of the working fluid flowing through the buffer container is controlled by the pressure control device, thereby slowing down or even eliminating the pressure fluctuation of the high-temperature working fluid, and further improving the operating service life of the solid oxide fuel cell system.

[0086] In one embodiment, the control mode of the pressure control device is determined according to the pressure fluctuation information and the temperature information, including the following three situations:

[0087] Case 1: If the pressure fluctuation information is less than the first preset pressure threshold, and the temperature information is within the first preset temperature range, the control mode is determined to be the first control mode; the first control mode includes any one of the passive control mode, the heat control mode and the cold control mode;

[0088] The second case: if the pressure fluctuation information is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, and the temperature information is in the second preset temperature range, then the control mode is determined to be the second control mode; the first preset temperature range and the second preset temperature range do not completely overlap; or,

[0089] The third case: if the pressure fluctuation information is greater than the second preset pressure threshold and less than the third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature range, the control mode is determined to be the second control mode; the second control mode includes a hot control mode or a cold control mode.

[0090] In one embodiment, the pressure of the working fluid in the solid fuel cell system is controlled according to a control mode, including: when the control mode is a thermal control mode, using a heating component to heat the working fluid flowing through a buffer container to control the pressure of the working fluid in the solid fuel cell system.

[0091] In one embodiment, the pressure of the working fluid in the solid fuel cell system is controlled according to a control mode, including: when the control mode is a cold control mode, using a cooling module to cool the working fluid flowing through the buffer container to control the pressure of the working fluid in the solid fuel cell system.

[0092] FIG5 is a flow chart of a pressure control method in an embodiment, as shown in FIG5 , comprising the following steps:

[0093] S301, obtaining pressure fluctuation information and temperature information of a working fluid in a solid fuel cell system;

[0094] S302, if the pressure fluctuation information is less than a first preset pressure threshold, and the temperature information is within a first preset temperature range, determining that the control mode is a first control mode; the first control mode includes any one of a passive control mode, a heat control mode, and a cold control mode;

[0095] S303, if the pressure fluctuation information is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, and the temperature information is in the second preset temperature range, then the control mode is determined to be the second control mode; the first preset temperature range and the second preset temperature range do not completely overlap;

[0096] S304, if the pressure fluctuation information is greater than the second preset pressure threshold and less than the third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature range, then the control mode is determined to be the second control mode; the second control mode includes a heat control mode or a cold control mode;

[0097] S305, when the control mode is a thermal control mode, heating the working fluid flowing through the buffer container by using a heating component to control the pressure of the working fluid in the solid fuel cell system;

[0098] S306, when the control mode is the cold control mode, the working fluid flowing through the buffer container is cooled by a cooling module to control the pressure of the working fluid in the solid fuel cell system.

[0099] In an embodiment of the present application, after obtaining the pressure fluctuation information and temperature information, the control mode of the pressure control device is determined based on the pressure fluctuation information and the temperature information, and the pressure control device is used to control the pressure of the working fluid flowing through the buffer container, thereby slowing down or even eliminating the pressure fluctuation of the high-temperature working fluid, and further improving the operating service life of the solid oxide fuel cell system.

[0100] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0101] Based on the same inventive concept, the embodiment of the present application also provides a pressure control device for implementing the pressure control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more pressure control device embodiments provided below can refer to the limitations on the pressure control method above, and will not be repeated here.

[0102] In an exemplary embodiment, a control device is provided, which may be a server, and its internal structure diagram may be shown in FIG6. The control device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the control device is used to provide computing and control capabilities. The memory of the control device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the control device is used to store relevant data of pressure control. The input / output interface of the control device is used to exchange information between the processor and an external device. The communication interface of the control device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a pressure control method is implemented.

[0103] Those skilled in the art will understand that the structure shown in FIG. 6 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the control device to which the scheme of the present application is applied. The specific control device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0104] In an exemplary embodiment, a control device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of any of the above method embodiments when executing the computer program.

[0105] In an exemplary embodiment, a solid fuel cell system is provided, which includes a hot zone auxiliary device, a fuel cell stack device, and a pressure control device as shown in FIG. 1 or FIG. 3 , wherein the pressure control device is arranged between the hot zone auxiliary device and the fuel cell stack device.

[0106] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above method embodiments are implemented.

[0107] In one embodiment, a computer program product is provided, including a computer program, which implements the steps of any of the above method embodiments when executed by a processor.

[0108] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0109] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0110] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0111] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A pressure control device, characterized in that: The pressure control device comprises a control device, a buffer container and a pressure regulating device; the control device is in communication connection with the pressure regulating device; The control device is used to obtain pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system, and determine the control mode of the pressure control device according to the pressure fluctuation information and temperature information; The pressure regulating device is used to control the pressure of the working fluid flowing through the buffer container in the solid fuel cell system based on the control mode under the control of the control device.

2. The pressure control device according to claim 1, characterized in that: The pressure control device further comprises a buffer membrane disposed in the buffer container, wherein the buffer membrane is provided with a plurality of buffer holes; The buffer membrane is used to divide the space of the buffer container into two buffer spaces, and adjust the volumes of the two buffer spaces based on the plurality of buffer holes.

3. The pressure control device according to claim 1, characterized in that: The pressure regulating device includes a plurality of heating assemblies, and the heating assemblies are arranged in the buffer container; The plurality of heating components are used to heat the working fluid flowing through the buffer container under the control of the control device.

4. The pressure control device according to claim 1, characterized in that: The pressure regulating device comprises a cooling module, and the cooling module comprises a cooling component, a switch component, a power component and a coolant container; the cooling component is arranged in the buffer container, and the switch component, the power component and the coolant container are arranged outside the buffer container; The power assembly is used to obtain coolant from the coolant container under the control of the control device, and to deliver the coolant to the cooling assembly through the switch assembly; The cooling component is used to cool the working medium flowing through the buffer container by using the coolant.

5. The pressure control device according to claim 1, characterized in that: The pressure control device further comprises a heat preservation box and a high-temperature penetration member penetrating the heat preservation box, wherein the heat preservation box is wrapped around the outer periphery of the buffer container; The high temperature penetration piece is used to connect the components inside and outside the heat preservation box.

6. A pressure control method, characterized in that: The method is applied to the control device of the pressure control device according to any one of claims 1 to 5, and the method comprises: Obtain pressure fluctuation information and temperature information of the working fluid in the solid fuel cell system; determining a control mode of the pressure control device according to the pressure fluctuation information and the temperature information; The pressure of the working fluid flowing through the buffer container in the solid fuel cell system is controlled according to the control mode.

7. The method according to claim 6, characterized in that Determining the control mode of the pressure control device according to the pressure fluctuation information and the temperature information includes: If the pressure fluctuation information is less than a first preset pressure threshold, and the temperature information is within a first preset temperature range, the control mode is determined to be a first control mode; the first control mode includes any one of a passive control mode, a heat control mode, and a cold control mode; If the pressure fluctuation information is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, and the temperature information is in the second preset temperature range, then the control mode is determined to be the second control mode; the first preset temperature range and the second preset temperature range do not completely overlap; or, If the pressure fluctuation information is greater than the second preset pressure threshold and less than the third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature range, the control mode is determined to be the second control mode; the second control mode includes the hot control mode or the cold control mode.

8. The method according to claim 7, characterized in that The controlling the pressure of the working fluid in the solid fuel cell system according to the control mode includes: When the control mode is the thermal control mode, a heating component is used to heat the working fluid flowing through the buffer container to control the pressure of the working fluid in the solid fuel cell system.

9. The method according to claim 7, characterized in that: The controlling the pressure of the working fluid in the solid fuel cell system according to the control mode includes: When the control mode is the cold control mode, a cooling module is used to cool the working medium flowing through the buffer container to control the pressure of the working medium in the solid fuel cell system.

10. A solid fuel cell system, characterized in that: The system comprises a hot zone auxiliary device, a fuel cell stack device and a pressure control device as described in any one of claims 1 to 5, wherein the pressure control device is arranged between the hot zone auxiliary device and the fuel cell stack device.

11. A control device, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 6 to 9 are implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 6 to 9 are implemented.

13. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 6 to 9 are implemented.

Images