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

Abstract

The present application relates to a pressure control apparatus and method, a solid fuel cell system, and a control device. The pressure control apparatus comprises a control device, a buffer container, and a pressure regulating device; the control device is used for acquiring pressure fluctuation information and temperature information of a working medium in a solid fuel cell system, and determining a control mode of the pressure control apparatus on the basis of the pressure fluctuation information and the temperature information; the pressure regulating device is used for controlling, under the control of the control device and on the basis of the control mode, the pressure of the working medium in the solid fuel cell system flowing through the buffer container. In embodiments of the present application, in the solid fuel cell system, due to the provision of the buffer container, 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, thereby buffering the pressure fluctuation. The pressure of the working medium flowing through the buffer container can also be controlled by controlling the pressure regulating device, thereby achieving a pressure fluctuation suppression effect.

Description

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

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 2024113014472, filed on September 18, 2024, entitled “Pressure control device, method, solid fuel cell system and control device”, the contents of which are hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of fuel cell, in particular to a pressure control device, method, solid fuel cell system and control device. BACKGROUND

[0004] A solid oxide fuel cell system can directly convert the chemical energy of fuel in a solid oxide fuel cell into electrical energy and thermal energy at a working temperature of 600-800℃, wherein the fuel can be different gas sources such as hydrogen, biomass gas, natural gas, biogas, etc. In addition to the fuel, the solid oxide fuel cell system also needs two working media of water and air. The heat zone auxiliary device of the solid oxide fuel cell system converts the three working media of fuel, air and water into components and environment required for power generation of the stack device. The stack device directly converts the chemical energy in the converted working media into electrical energy and thermal energy under conditions such as temperature and catalyst.

[0005] Since the heat zone auxiliary device needs to convert liquid water into high-temperature steam at a certain temperature, it is often difficult to achieve stable and accurate water supply control at low flow rate, which can easily lead to fluctuations in the pressure of the solid oxide fuel cell system. If the pressure fluctuation is too large, it will greatly affect the service life of the stack device, thereby affecting the service life of the entire solid oxide fuel cell system. SUMMARY

[0006] Therefore, it is necessary to provide a pressure control device, method, solid fuel cell system and control device capable of reducing the pressure fluctuation of the solid oxide fuel cell system to solve the above technical problems.

[0007] In a first aspect, the present application provides a 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;

[0008] The control device is configured to acquire pressure fluctuation information and temperature information of a working medium in a solid fuel cell system, and determine a control mode of the pressure control device according to the pressure fluctuation information and the temperature information.

[0009] The pressure regulating device is configured to control 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 device.

[0010] In one of the embodiments, the pressure control device further comprises a buffer film arranged in the buffer container, and a plurality of buffer holes are arranged on the buffer film.

[0011] The buffer film is configured 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.

[0012] In one of the embodiments, the pressure regulating device comprises a plurality of heating assemblies arranged in the buffer container.

[0013] The plurality of heating assemblies are configured to heat the working medium flowing through the buffer container under the control of the control device.

[0014] In one of the embodiments, the pressure regulating device comprises a cooling module, and the cooling module comprises a cooling assembly, a switch assembly, a power assembly and a coolant container; the cooling assembly is arranged in the buffer container, and the switch assembly, the power assembly and the coolant container are arranged outside the buffer container.

[0015] The power assembly is configured to obtain the coolant from the coolant container under the control of the control device and deliver the coolant to the cooling assembly through the switch assembly.

[0016] The cooling assembly is configured to cool the working medium flowing through the buffer container by the coolant.

[0017] In one of the embodiments, the pressure control device further comprises a heat preservation box and a high-temperature through-piece penetrating the heat preservation box, and the heat preservation box is wrapped around the periphery of the buffer container.

[0018] The high-temperature through-piece is configured to connect the components inside and outside the heat preservation box.

[0019] In a second aspect, the application provides a pressure control method, comprising:

[0020] Obtaining the pressure fluctuation information and temperature information of the working medium in the solid fuel cell system;

[0021] Determining the control mode of the pressure control device according to the pressure fluctuation information and temperature information;

[0022] Controlling the pressure of the working medium flowing through the buffer container in the solid fuel cell system according to the control mode.

[0023] In one embodiment, the determining the control mode of the pressure control device according to the pressure fluctuation information and the temperature information comprises:

[0024] If the pressure fluctuation information is less than a first preset pressure threshold, and the temperature information is in a first preset temperature interval, the control mode is determined as a first control mode; the first control mode comprises any one of a passive control mode, a hot control mode and a cold control mode.

[0025] If the pressure fluctuation information is greater than or equal to the first preset pressure threshold, less than a second preset pressure threshold, and the temperature information is in a second preset temperature interval, the control mode is determined as a second control mode; the first preset temperature interval and the second preset temperature interval do not completely overlap; or,

[0026] If the pressure fluctuation information is greater than the second preset pressure threshold, less than a third preset pressure threshold, and the temperature information is greater than a maximum value of the first preset temperature interval, the control mode is determined as the second control mode; the second control mode comprises the hot control mode or the cold control mode.

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

[0028] In a case where the control mode is the hot control mode, a heating assembly is used to heat the working medium flowing through the buffer container, so as to control the pressure of the working medium in the solid fuel cell system.

[0029] In one embodiment, the controlling the pressure of the working medium in the solid fuel cell system according to the control mode comprises:

[0030] In a case where the control mode is the cold control mode, a cooling module is used to cool the working medium flowing through the buffer container, so as to control the pressure of the working medium in the solid fuel cell system.

[0031] In a third aspect, the present application further provides a control device, comprising a memory and a processor, the memory stores a computer program, and the processor implements the method steps of the second aspect when executing the computer program.

[0032] In a fourth aspect, the present application further provides a solid fuel cell system, which comprises a hot region auxiliary device, a stack device and a pressure control device as described in the first aspect, and the pressure control device is arranged between the hot region auxiliary device and the stack device.

[0033] In a fifth aspect, the present application provides a computer readable storage medium, having stored thereon a computer program, which, when executed by a processor, implements the method steps of the second aspect.

[0034] In a sixth aspect, the present application provides a computer program product, comprising a computer program which, when executed by a processor, implements the method steps of the second aspect.

[0035] The pressure control device, method, solid fuel cell system and control device, 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 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 regulating device is used for controlling, under the control of the control device, the pressure of the working medium flowing through the buffer container in the solid fuel cell system based on the control mode. In the present application, 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, thereby realizing the accommodation and buffering of the pressure fluctuation, and playing a passive role in the suppression of the pressure fluctuation. Moreover, the pressure of the working medium flowing through the buffer container can be controlled by the pressure regulating device, thereby playing an active role in the suppression of the pressure fluctuation. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the disclosed drawings.

[0037] FIG. 1 is a structural block diagram of a pressure control device in an embodiment;

[0038] FIG. 2 is a flowchart of a pressure control method in an embodiment;

[0039] FIG. 3 is a structural block diagram of a pressure control device in another embodiment;

[0040] FIG. 4 is a flowchart of a pressure control method in another embodiment;

[0041] FIG. 5 is a flowchart of a pressure control method in another embodiment;

[0042] FIG. 6 is an internal structure diagram of a control device in an embodiment.

[0043] Legend: 00, server; 01, pressure control device; 11, control device; 12, buffer container; 13, pressure regulating device; 14, buffer film; 141, buffer hole; 131, heating assembly; 132, cooling module; 1321, cooling assembly; 1322, switch assembly; 1323, power assembly; 1324, coolant container; 15, heat preservation hot box; 16, high temperature penetrating piece; 121, container inlet; 122, container outlet. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In the present application, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “plurality” is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0047] In the present application, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like should be broadly understood, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically defined otherwise and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0049] Figure 1 is a schematic diagram of a pressure control device in one 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 in communication connection with the pressure regulating device 13; the control device 11 is used to obtain the pressure fluctuation information and temperature information of the working medium 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 medium flowing through the buffer container 12 in the solid fuel cell system under the control of the control device based on the control mode.

[0050] Because the fuel, water and air and other working medium 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℃ and a low pressure of not higher than 10kPa. Once the water, fuel and other working medium fail to achieve high-precision stable supply under low flow, the thermal balance of the solid oxide fuel cell system will be broken, which leads to the problem of pressure fluctuation in the solid oxide fuel cell system. If there is a large pressure fluctuation in the solid oxide fuel cell system, the stack device in the solid oxide fuel cell system may deteriorate prematurely, thereby affecting the overall life of the solid oxide fuel cell system. According to the ideal gas state equation, the change of pressure is affected by volume and temperature, so the pressure of the working medium can be controlled by changing the temperature of the working medium in the buffer container 12 and the volume of the environment where the working medium is located.

[0051] In the embodiments of the present application, as shown in FIG. 1, the pressure control device 01 comprises a control device 11, a buffer container 12 for containing the working medium, and a pressure regulating device 13. When the working medium with a certain temperature enters the buffer container 12 from a container inlet 121 of the buffer container 12, it flows out from the container inlet 121. Compared with the transmission pipeline between the heating auxiliary device and the electric pile device in the solid fuel cell system in the prior art, the buffer container 12 has a certain volume, and 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 the control of the pressure.

[0052] Further, the temperature of the working medium can also be adjusted by the pressure regulating device 13 to control the pressure of the working medium flowing through the buffer container 12, so that the pressure of the working medium in the solid oxide fuel cell system does not fluctuate.

[0053] The control device 11 can be communicatively connected with the pressure regulating device 13. On the one hand, the sensing system collects the pressure fluctuation information and temperature information of the working medium 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 medium in the solid oxide fuel cell system from the sensing system. On the other hand, the sensing system collects the pressure fluctuation information and temperature information of the working medium in the solid oxide fuel cell system, and sends the pressure fluctuation information and temperature information to a server 00 in the solid fuel cell system, and the control device 11 directly obtains the pressure fluctuation information and temperature information from the server 00, thereby avoiding the modification of the original circuit structure and the like in the solid fuel cell system.

[0054] In combination with FIG. 2, the first case is that when the solid oxide fuel cell system is not running or there is no pressure fluctuation, it is assumed that the pressure fluctuation information detected by the solid oxide fuel cell system is not more than Pk0 (Pk0 is less than the first preset pressure threshold value), and no pressure adjustment control is required. 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 value Pk1, because the damage of the pressure fluctuation to the stack device in the solid oxide fuel cell system is low, the tolerance of the solid oxide fuel cell system to the pressure fluctuation is high, and the pressure control device 01 works in the first control mode. Thus, 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 value, and the temperature information is in the first preset temperature interval (t11-t12), it is determined that the control mode is the first control mode. In the first control mode, because the pressure fluctuation is small, the pressure of the working medium can be passively controlled by the inherent volume of the buffer container 12; or the pressure of the working medium can be actively controlled by the pressure regulating device 13, that is, the first control mode can be a passive control mode, a hot control mode or a cold control mode.

[0055] Optionally, the first preset pressure threshold value Pk1 can be a typical value of 2000 Pa, 3000 Pa, etc., and the first preset temperature interval of the working medium can be 100-300°C.

[0056] The second case is that the pressure fluctuation information of the working medium of the solid oxide fuel cell system continues to increase, and 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 when the solid oxide fuel cell system is in the start-up and heating process, or the solid oxide fuel cell system is unstable and falls from a high heat power operating state to a low heat power operating state, the possibility of pressure fluctuation and oscillation is larger. Therefore, if the pressure fluctuation information is greater than or equal to the first preset pressure threshold value and 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, and at this time, the control device 11 needs to automatically switch the operating mode to the second control mode, and adjust the temperature of the working medium flowing through the buffer container 12 by using the pressure regulating device 13 to control the pressure of the working medium. Optionally, the second control mode can be a hot control mode or a cold control mode, and because the pressure of the working medium of the solid oxide fuel cell system is continuously increasing in this case, the phenomenon of the second control mode being a hot control mode is more common in this case.

[0057] Optionally, the second preset pressure threshold Pk2 can be 4500 Pa, and the second preset temperature range can be a range around the boiling point, for example, the second preset temperature range is 80-150℃, or 80-120℃.

[0058] The third case: when the pressure fluctuation information of the working medium of the solid oxide fuel cell system is greater than the second preset pressure threshold Pk2, at this time, the possibility of continuous deterioration of the pressure fluctuation is greater, when the temperature information of the working medium in the solid oxide fuel cell system is greater than the maximum value of the first preset temperature range, the solid oxide fuel cell system is in high heat power operation, and if the heat balance is unstable, the working medium will deviate. Therefore, if the pressure fluctuation information is greater than the second preset pressure threshold, less than the third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature range, 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 adjusts the temperature of the working medium flowing through the buffer container 12 by using the pressure regulating device 13 to control the pressure of the working medium. Optionally, the second control mode in this case can be a cold control mode, or a hot control mode.

[0059] Optionally, the third preset pressure threshold Pk3 can be 6000 Pa, and the maximum value t12 of the first preset temperature range can be 300℃.

[0060] Optionally, the control device 11 can be arranged outside the buffer container 12, and the pressure regulating device 13 can be arranged inside the buffer container 12, or part of the components of the pressure regulating device 13 can be arranged inside the buffer container 12, and part of the components can be arranged outside the buffer container 12. Since the pressure regulating device 13 adjusts the temperature of the working medium flowing through the buffer container 12, the pressure regulating device 13 can include a heating module and / or a cooling module, the heating module can be a heating component, and the cooling module can be a coolant circulation system, an isolated condenser, etc.

[0061] It should be noted that in order to ensure the stability of the pressure control of the working medium, the control device 11 reduces the delay time as much as possible when switching modes, for example, the time delay of switching is not more than 1 minute.

[0062] In the embodiment of the present application, 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 for acquiring pressure fluctuation information and temperature information of the 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 regulating device is used for controlling the pressure of the working medium flowing through the buffer container in the solid fuel cell system under the control of the control device based on the control mode. 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 medium in the solid fuel cell system fluctuates, the inherent space provided by the buffer container can provide a certain amount of buffer capacity, thereby realizing the accommodation and buffering of the pressure fluctuation, and playing a passive role in the suppression of the pressure fluctuation. Moreover, the pressure of the working medium flowing through the buffer container can be controlled by the pressure regulating device, thereby playing an active role in the suppression of the pressure fluctuation.

[0063] Fig. 3 is a schematic diagram of the pressure control device in another embodiment. As shown in Fig. 3, the pressure control device further comprises a buffer film 14 arranged in the buffer container 12, and a plurality of buffer holes 141 are arranged on the buffer film 14; the buffer film 14 is used for dividing the space of the buffer container 12 into two buffer spaces, and adjusting the volumes of the two buffer spaces based on the plurality of buffer holes 141.

[0064] In the embodiment of the present application, as shown in Fig. 3, the buffer film 14 with a certain degree of freedom is arranged in the buffer container 12, and a plurality of micro-released buffer holes 141 are arranged on the buffer film 14, so that the buffer space on the right side of the buffer film 14 is a non-sealed space, and the space pressure on the right side of the buffer film 14 can be properly released, so as not to overpressure during the process of heating the solid fuel cell system.

[0065] When the working medium 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 film 14 is automatically accompanied, and through the deformation of the buffer film 14, the pressure regulation of the two buffer spaces on the left and right sides of the buffer container 12 can be realized, so that the pressure control device 01 has the ability of automatic regulation without external energy.

[0066] Since the control of the pressure by the buffer film 14 is a kind of passive control, the buffer film 14 has a natural pressure buffering and regulating ability, and can play a role in pressure control in any control mode. Preferably, in the first control mode, since the pressure fluctuation is small, the pressure control can be performed only by the buffer film 14, 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 the passive control of the pressure can be performed by the buffer film 14 based on the buffer container 12.

[0067] Further, the pressure regulating device 13 comprises a plurality of heating assemblies 131, which are arranged in the buffer container 12, and are used to heat the working medium flowing through the buffer container 12 under the control of the control device 11.

[0068] Continuing as shown in FIG. 3, the control device 11 obtains the temperature information and the pressure fluctuation information of the working medium from the server 00, and automatically switches the control mode to the heat control mode after determining the control mode based on the temperature information and the pressure fluctuation information. At this time, in order to meet the needs of heat balance and pressure balance, the control device automatically calculates the number of heating assemblies 131 to be put into, and controls the corresponding number of heating assemblies 131 to be put into. With the input of the heating assemblies 131, the working medium in the buffer container 12 is automatically heated, so as to gradually increase the temperature of the working medium, form a new heat balance, and thus realize the control of the working pressure of the solid oxide fuel cell system.

[0069] Further, the pressure regulating device 13 comprises a cooling module 132, which comprises a cooling assembly 1321, a switching assembly 1322, a power assembly 1323, and a coolant container 1324; the cooling assembly 1321 is arranged in the buffer container 12, and the switching assembly 1322, the power assembly 1323, and the coolant container 1324 are arranged outside the buffer container 12; the power assembly 1323 is used to obtain the coolant from the coolant container 1324 and deliver the coolant to the cooling assembly 1321 through the switching assembly 1322 under the control of the control device 11; and the cooling assembly 1321 is used to cool the working medium flowing through the buffer container 12 by the coolant.

[0070] Continuing as shown in FIG. 3, the control mode is automatically switched to the cold control mode after determining the control mode based on the temperature information and the pressure fluctuation information. In order to meet the needs of heat balance and pressure balance, the control device 11 automatically calculates the flow rate of the coolant to be put into. The control device 11 controls the switching assembly 1322 to be opened, and controls the power assembly 1323 to extract the coolant from the coolant container 1324 and deliver the coolant to the cooling assembly 1321. At this time, the working medium in the buffer container 12 is automatically cooled, so as to realize the control of the working pressure of the solid oxide fuel cell system.

[0071] It should be noted that according to the above analysis, the non-active control mode is realized by using the inherent space of the buffer container 12 and the deformation of the buffer film 14, and therefore, in the heat control mode and the cold control mode of the present application, the non-active control mode is essentially accompanied. Since the control effect of the non-active control mode on the pressure fluctuation is smaller than that of the heat control mode or the cold control mode, in order to simplify the description, the non-active control mode is not embodied in the analysis of the heat control mode or the cold control mode in the embodiments of the present application.

[0072] In the embodiment, the buffering film and the pressure regulating device are used to set two pressure control modes, i.e., active and passive, so that the solid oxide fuel cell system can work under high temperature and low pressure, and the pressure stability of the solid oxide fuel cell system can be effectively controlled, the pressure fluctuation of the system can be slowed down or even eliminated, and the service life of the solid oxide fuel cell system is prolonged.

[0073] In one embodiment, as shown in FIG. 3, the pressure control device further comprises a heat preservation box 15 and a high-temperature through-piece 16 penetrating the heat preservation box 15, the heat preservation box 15 is wrapped around the buffering container 12, and the high-temperature through-piece 16 is used to connect components inside and outside the heat preservation box 15.

[0074] In the embodiment, the buffering container 12 is arranged in the heat preservation box 15, and the high-temperature through-piece 16 is used to connect components outside the heat preservation box 15 under normal temperature and components in the buffering container 12 under high temperature.

[0075] Optionally, the components in the heat preservation box 15 include a heating component 131 and a cooling component 1321, and the components outside the heat preservation box include a switch component 1322, a power component 1323, a coolant container 1324, and the control device 11.

[0076] In one exemplary embodiment, as shown in FIG. 4, a pressure control method is provided, and the method is described by taking the control device in FIG. 1 as an example, and the method comprises the following steps S201 to S203.

[0077] S201, obtaining pressure fluctuation information and temperature information of a working medium in a solid fuel cell system.

[0078] S202, determining a control mode of a pressure control device according to the pressure fluctuation information and the temperature information.

[0079] S203, controlling the pressure of the working medium flowing through the buffering container in the solid fuel cell system according to the control mode.

[0080] The specific implementation can refer to the above-described embodiments corresponding to FIGS. 1-3.

[0081] In the pressure control method, the pressure fluctuation information and the temperature information of the working medium in the solid fuel cell system are obtained, 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 medium flowing through the buffer container in the solid fuel cell system is controlled according to the control mode. In the embodiment of the 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 medium flowing through the buffer container is controlled by using the pressure control device, so as to slow down or even eliminate the pressure fluctuation of the high-temperature working medium, and further improve the operation service life of the solid oxide fuel cell system.

[0082] In one embodiment, according to the pressure fluctuation information and the temperature information, the control mode of the pressure control device is determined, including the following three cases:

[0083] The first case: if the pressure fluctuation information is less than a first preset pressure threshold, and the temperature information is in a first preset temperature interval, the control mode is determined as a first control mode; the first control mode includes any one of a passive control mode, a hot control mode and a cold control mode.

[0084] The second case: if the pressure fluctuation information is greater than or equal to the first preset pressure threshold and less than a second preset pressure threshold, and the temperature information is in a second preset temperature interval, the control mode is determined as a second control mode; the first preset temperature interval and the second preset temperature interval do not completely overlap; or,

[0085] The third case: if the pressure fluctuation information is greater than the second preset pressure threshold and less than a third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature interval, the control mode is determined as the second control mode; the second control mode includes the hot control mode or the cold control mode.

[0086] In one embodiment, the pressure of the working medium in the solid fuel cell system is controlled according to the control mode, including: in the case of the hot control mode, the working medium flowing through the buffer container is heated by using a heating assembly to control the pressure of the working medium in the solid fuel cell system.

[0087] In one embodiment, the pressure of the working medium in the solid fuel cell system is controlled according to the control mode, including: in the case of the cold control mode, the working medium flowing through the buffer container is cooled by using a cooling module to control the pressure of the working medium in the solid fuel cell system.

[0088] FIG. 5 is a flowchart of a pressure control method in one embodiment, as shown in FIG. 5, including the following steps:

[0089] S301, obtaining the pressure fluctuation information and the temperature information of the working medium in the solid fuel cell system;

[0090] S302, if the pressure fluctuation information is less than a first preset pressure threshold and the temperature information is in a first preset temperature interval, determining that the control mode is a first control mode; the first control mode includes any one of a passive control mode, a hot control mode and a cold control mode;

[0091] S303, if the pressure fluctuation information is greater than or equal to the first preset pressure threshold and less than a second preset pressure threshold, and the temperature information is in a second preset temperature interval, determining that the control mode is a second control mode; the first preset temperature interval and the second preset temperature interval do not completely overlap;

[0092] S304, if the pressure fluctuation information is greater than the second preset pressure threshold and less than a third preset pressure threshold, and the temperature information is greater than a maximum value of the first preset temperature interval, determining that the control mode is the second control mode; the second control mode includes the hot control mode or the cold control mode;

[0093] S305, in the case where the control mode is the hot control mode, using a heating assembly to heat the working medium flowing through the buffer container, so as to control the pressure of the working medium in the solid fuel cell system;

[0094] S306, in the case where the control mode is the cold control mode, using a cooling module to cool the working medium flowing through the buffer container, so as to control the pressure of the working medium in the solid fuel cell system.

[0095] In the embodiments 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 medium flowing through the buffer container is controlled by using the pressure control device, so as to slow down or even eliminate the pressure fluctuation of the high-temperature working medium, and further improve the operation and service life of the solid oxide fuel cell system.

[0096] It should be understood that, although each step in the flowchart involved in the above embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in the above embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0097] Based on the same inventive concept, the embodiments of the present application also provide a pressure control device for implementing the pressure control method described above. The implementation scheme of the device for solving the problem is similar to the implementation scheme described in the above method, so the specific limitations in one or more pressure control device embodiments provided below can refer to the limitations of the pressure control method described above, which will not be repeated here.

[0098] In an exemplary embodiment, a control device is provided, which can be a server, and an internal structure diagram of the control device can be as shown in FIG. 6. The control device includes a processor, a memory, an input / output interface (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 related data of pressure control. The input / output interface of the control device is used to exchange information between the processor and external devices. The communication interface of the control device is used to communicate with the terminal outside through network connection. The computer program is executed by the processor to implement a pressure control method.

[0099] Those skilled in the art can understand that the structure shown in FIG. 6 is only a block diagram of part of the 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 can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0100] In an exemplary embodiment, a control device is provided, including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of any of the method embodiments described above.

[0101] In an exemplary embodiment, a solid fuel cell system is provided, which includes a hot zone auxiliary device, a stack device and the pressure control device shown in FIG. 1 or FIG. 3, and the pressure control device is arranged between the hot zone auxiliary device and the stack device.

[0102] In an exemplary embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the steps of any of the method embodiments described above.

[0103] In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of any of the above method embodiments.

[0104] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0105] It can be understood by those skilled in the art that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware. 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 above-mentioned embodiments of the method. In the embodiments provided in the present application, any reference to memory, database or other medium can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (Resistive Random Access Memory, ReRAM), magnetoresistive random access memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (Artificial Intelligence, AI) processor, etc., without being limited thereto.

[0106] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered to be within the scope of the present application.

[0107] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications 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 should be subject to the appended claims.

Claims

1. A pressure control device, wherein, 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 configured to acquire pressure fluctuation information and temperature information of a working medium in a solid fuel cell system, and determine a control mode of the pressure control device according to the pressure fluctuation information and the temperature information; The pressure regulating device is configured to control 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 device.

2. The pressure control device of claim 1, wherein, The pressure control device further comprises a buffer film arranged in the buffer container, and a plurality of buffer holes are arranged on the buffer film; The buffer film is configured 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 of claim 1, wherein, The pressure regulating device comprises a plurality of heating assemblies arranged in the buffer container; The plurality of heating assemblies are configured to heat the working medium flowing through the buffer container under the control of the control device.

4. The pressure control device of claim 1, wherein, The pressure regulating device comprises a cooling module, and the cooling module comprises a cooling assembly, a switch assembly, a power assembly and a coolant container; the cooling assembly is arranged in the buffer container, and the switch assembly, the power assembly and the coolant container are arranged outside the buffer container; The power assembly is configured to acquire coolant from the coolant container under the control of the control device, and deliver the coolant to the cooling assembly through the switch assembly; The cooling assembly is configured to cool the working medium flowing through the buffer container by the coolant.

5. The pressure control device of claim 1, wherein, The pressure control device further comprises a heat preservation box and a high-temperature through-piece penetrating through the heat preservation box, and the heat preservation box is wrapped around the periphery of the buffer container; The high-temperature through-piece is configured to connect components inside and outside the heat preservation box.

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

7. The method of claim 6, wherein, The determination of the control mode of the pressure control device according to the pressure fluctuation information and the temperature information comprises: if the pressure fluctuation information is less than a first preset pressure threshold, and the temperature information is in a first preset temperature interval, then the control mode is determined as a first control mode; the first control mode comprises any one of a passive control mode, a hot 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 a second preset pressure threshold, and the temperature information is in a second preset temperature interval, then the control mode is determined as a second control mode; the first preset temperature interval and the second preset temperature interval do not completely overlap; or, If the pressure fluctuation information is greater than the second preset pressure threshold, less than a third preset pressure threshold, and the temperature information is greater than the maximum value of the first preset temperature range, it is determined that the control mode is the second control mode; the second control mode includes the hot control mode or the cold control mode.

8. The method of claim 7, wherein, The pressure of the working medium in the solid fuel cell system is controlled according to the control mode, including: In the case where the control mode is the hot control mode, a heating assembly is used to heat the working medium flowing through the buffer container to control the pressure of the working medium in the solid fuel cell system.

9. The method of claim 7, wherein, The pressure of the working medium in the solid fuel cell system is controlled according to the control mode, including: In the case where 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, wherein, The system includes a hot zone auxiliary device, a stack device, and a pressure control device as claimed in any one of claims 1-5, the pressure control device being arranged between the hot zone auxiliary device and the stack device.

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