Temperature control method and device, electronic equipment, storage medium and program product

Abstract

The invention relates to a temperature control method and device, electronic equipment, a storage medium and a program product, relates to the technical field of fuel cells, and can reduce the fluctuation of the working temperature of an engine in a fuel cell system. The method comprises the following steps: acquiring temperature information of a fuel cell stack in a fuel cell system, wherein the temperature information comprises in-stack temperature and out-stack temperature; and determining a target working mode from a plurality of preset working modes according to the temperature information, and controlling the running state of a thermostat and / or a water pump in the fuel cell system according to the target working mode so as to reduce the fluctuation of the working temperature of an engine in the fuel cell system.

Description

Technical Field

[0001] The present disclosure relates to the field of fuel cell technology, and in particular, to a temperature control method, device, electronic device, storage medium and program product. Background Art

[0002] Fuel cell engines can be used as a source of power output for ships, and proton exchange membranes are one of the core components of fuel cell engines. Their operating temperature will directly affect the output power and efficiency of the fuel cell engines. If the operating temperature is too low, the number of electrochemical reactions will slow down and the output power will decrease. If the operating temperature is too high, the proton exchange membrane will be damaged, resulting in a decrease in the performance of the fuel cell. Summary of the invention

[0003] In order to solve the above technical problems, the present disclosure provides a temperature control method, device, electronic device, storage medium and program product.

[0004] In order to achieve the above objectives, in a first aspect, the present disclosure provides a temperature control method, the method comprising: Acquiring temperature information of a fuel cell stack in a fuel cell system, wherein the temperature information includes a stack entry temperature and a stack exit temperature; A target operating mode is determined from a plurality of preset operating modes according to the temperature information, and the operating state of a thermostat and / or a water pump in the fuel cell system is controlled according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

[0005] In a second aspect, the present disclosure provides a temperature control device, the device comprising: An acquisition module is configured to acquire temperature information of a fuel cell stack in a fuel cell system, wherein the temperature information includes a stack entry temperature and a stack exit temperature; An execution module is configured to determine a target operating mode from a plurality of preset operating modes according to the temperature information, and control the operating state of a thermostat and / or a water pump in the fuel cell system according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

[0006] In a third aspect, the present disclosure provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the method described in the first aspect.

[0007] In a fourth aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which implements the method described in the first aspect when the computer program is executed by a processor.

[0008] In a fifth aspect, the present disclosure provides a computer program product, including a computer program, which implements the method described in the first aspect when executed by a processor.

[0009] Through the above technical scheme, a target operating mode is determined from multiple preset operating modes based on the temperature information of the fuel cell stack, and the operating state of the thermostat and / or water pump in the fuel cell system is controlled according to the target operating mode to reduce the fluctuation of the operating temperature of the engine in the fuel cell system, thereby avoiding excessively high or low operating temperatures and improving the operating life and working efficiency of the fuel cell system.

[0010] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a flow chart showing a temperature control method according to an exemplary embodiment of the present disclosure.

[0012] Figure 2 is a schematic diagram showing a fuel cell system according to an exemplary embodiment of the present disclosure.

[0013] Figure 3 is another flow chart of a temperature control method according to an exemplary embodiment of the present disclosure.

[0014] Figure 4 is a block diagram of a temperature control device according to an exemplary embodiment of the present disclosure.

[0015] Figure 5 is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0016] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0017] It is worth noting that fuel cell engines can be used as a source of ship power output, and proton exchange membranes are one of the key components of fuel cell engines, and their operating temperature can directly affect the output power and efficiency of fuel cell engines. The operating temperature range of most proton exchange membranes is 60℃~80℃. The fuel cell system is cooled by deionized water or antifreeze with a conductivity of less than 5μS / cm. If the operating temperature of the proton exchange membrane is too low, the electrochemical reaction rate of the fuel cell system will slow down, the voltage will be low at the same current, and the output power will decrease. It will also cause water blockage in the air path, resulting in low voltage, and irreversible damage to the proton exchange membrane; if the operating temperature of the proton exchange membrane is too high, it will also cause damage to the proton exchange membrane and reduce the performance of the fuel cell.

[0018] The inventors found that the thermostat and water pump in the fuel cell system both use PID to adjust the duty cycle, thereby controlling the temperature and temperature difference of the coolant inlet and outlet. The above method controls relatively small temperature fluctuations under high-temperature steady-state conditions for ships, but when the coolant is in a cold state and the ship needs a large power output, it will cause excessive water temperature fluctuations and obvious overshoot, which is easy to trigger the fuel cell system fault protection threshold.

[0019] Secondly, the caliber of the thermostat required for high-power fuel cells is also relatively large. When the inlet temperature of the fuel cell stack (referred to as the stack) exceeds its target operating temperature, if the temperature difference is positive, the duty cycle of the thermostat will continue to increase. At this time, a large amount of coolant with a lower temperature will enter, causing the temperature of the stack to drop sharply; if the temperature difference is negative, the duty cycle of the thermostat will decrease until the thermostat is completely closed. At this time, the temperature of the stack will rise rapidly, causing the operating temperature of the stack to fluctuate too much. In addition, the temperature difference between the inlet and outlet of the fuel cell stack is affected by the speed of the water pump. Due to the large flow resistance in the water channel, if the temperature difference is too large, the speed of the water pump will continue to increase, resulting in excessive water channel pressure, triggering the system's pressure protection threshold.

[0020] In view of this, the present disclosure provides a temperature control method, device, electronic device, storage medium and program product to reduce the fluctuation of the operating temperature of the engine in the fuel cell system, thereby avoiding the operating temperature being too high or too low.

[0021] Figure 1 is a flow chart of a temperature control method according to an exemplary embodiment of the present disclosure. Figure 1 As shown, the temperature control method may include the following steps: In step S11, temperature information of a fuel cell stack in a fuel cell system is acquired, where the temperature information includes a stack entry temperature and a stack exit temperature.

[0022] It is worth noting that if Figure 2As shown, the fuel cell system includes a cold source water pump 1, a plate heat exchanger 2, a heat source outlet temperature sensor 3, a deionizer 4, a heat source water pump 5, a stack inlet pressure sensor 6, a stack inlet temperature sensor 7, an expansion water tank 8, a stack outlet temperature sensor 9, a stack outlet pressure sensor 10, a first flow meter 11, a thermostat 12, a second flow meter 13 and a third flow meter 14. The output end of the cold source water pump 1 is connected to the plate heat exchanger 2, and the deionizer 4, the heat source water pump 5, the fuel cell, the first flowmeter 11, the first end and the second end of the thermostat 12 and the second flowmeter 13 are connected in series and then connected to the plate heat exchanger 2; the heat source outlet temperature sensor 3 is connected between the plate heat exchanger 2 and the deionizer 4, the stack entry pressure sensor 6 and the stack entry temperature sensor 7 are connected between the heat source water pump 5 and the fuel cell in turn, the stack exit temperature sensor 9 and the stack exit pressure sensor 10 are connected between the fuel cell and the first flowmeter 11 in turn, and the third end of the thermostat 12 is connected between the deionizer 4 and the heat source water pump 5; the water outlet of the expansion water tank 8 is connected between the heat source outlet temperature sensor 3 and the deionizer 4, and the water inlet of the expansion water tank 8 is led out from between the stack exit temperature sensor 9 and the stack exit pressure sensor 10; the input end of the cold source water pump 1 and the third flowmeter 14 are both connected to the water source.

[0023] It should be understood that if Figure 2 As shown, before the fuel cell engine is started, the fuel cell system is filled with coolant through the expansion water tank 8, the thermostat 12 is adjusted to 70% opening, the heat source water pump 5 is turned, and the pressure fluctuation amplitude of the inlet pressure sensor 6 and the outlet pressure sensor 10 is used to determine whether there are a large number of bubbles in the current circuit. It is also possible to observe whether there is bubble overflow from the expansion water tank; when the fuel cell coolant is running in a cold state, the temperature information of the fuel cell stack needs to be obtained for control.

[0024] In step S12, a target operating mode is determined from a plurality of preset operating modes according to the temperature information, and the operating state of the thermostat and / or water pump in the fuel cell system is controlled according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

[0025] It is worth noting that the water pump includes a heat source water pump and / or a cold source water pump.

[0026] In the embodiment of the present disclosure, the inlet temperature and outlet temperature of the fuel cell stack are obtained, so that the heat distribution and heat dissipation requirements of the fuel cell system can be determined more accurately; because different working environments and working conditions have different requirements for the fuel cell system, the target working mode that best suits the current working conditions is determined from multiple preset working modes based on the inlet temperature and outlet temperature, so that the fuel cell system can flexibly adapt to different working environments and working conditions; the operating state of the thermostat and / or water pump is controlled according to the target working mode to reduce the fluctuation of the engine's operating temperature and avoid excessively high or low operating temperatures, thereby reducing the damage of thermal stress to the internal materials of the fuel cell, improving the operating life and working efficiency of the fuel cell system, and helping the fuel cell system to maintain the best operating state under different working conditions, thereby improving the reliability and stability of the fuel cell system.

[0027] In order to facilitate those skilled in the art to better understand the temperature control method provided by the present disclosure, the method is described in detail below.

[0028] It should be understood that there are two ways to determine the target operating mode from multiple preset operating modes based on the temperature information. Method 1: determine the target operating mode based on the matching results of the inlet temperature and the outlet temperature with multiple temperature intervals; Method 2: determine the target operating mode based on the temperature difference between the inlet temperature and the outlet temperature.

[0029] For method 1: determine the target working mode based on the matching results of the in-pile temperature and out-pile temperature with multiple temperature ranges.

[0030] In a feasible implementation manner, the method may further include: According to the historical operating temperature of the fuel cell stack, a plurality of temperature intervals are set in sections, each of the temperature intervals corresponds to a preset operating mode; In step S12, determining a target operating mode from a plurality of preset operating modes according to the temperature information may include: The stack entry temperature and the stack exit temperature are matched with the multiple temperature intervals respectively, and a preset working mode corresponding to a temperature interval where both the stack entry temperature and the stack exit temperature exist is determined as a target working mode.

[0031] For example, according to the historical operating temperature of the fuel cell stack, multiple temperature intervals are set in segments, namely (-∞, 40℃), [40℃~55℃) and [55℃, +∞), (-∞, 40℃) corresponds to the first preset operating mode, [40℃~55℃) corresponds to the second preset operating mode, and [55℃, +∞) corresponds to the third preset operating mode. The control object of the first preset operating mode includes the thermostat, the control object of the second preset operating mode includes the thermostat and the water pump, and the control object of the third preset operating mode includes the water pump.

[0032] The entry temperature and the exit temperature are matched with three temperature ranges of (-∞, 40℃), [40℃~55℃) and [55℃, +∞) respectively. If the entry temperature and the exit temperature are both within (-∞, 40℃), the first preset working mode is the target working mode; if the entry temperature and the exit temperature are both within [40℃~55℃), the second preset working mode is the target working mode; if the entry temperature and the exit temperature are both within [55℃, +∞), the third preset working mode is the target working mode.

[0033] The disclosed embodiment ensures that the fuel cell system operates within the optimal temperature range by setting the temperature intervals in segments and each temperature interval corresponds to a preset operating mode, which helps maintain the optimal activity of the catalyst in the fuel cell, thereby improving the output efficiency of electrical energy and reducing the generation of thermal stress, thereby extending the service life of the fuel cell.

[0034] In a feasible implementation manner, determining the target operating mode from a plurality of preset operating modes according to the temperature information may include: When the temperature interval in which both the stack entry temperature and the stack exit temperature exist is a first temperature interval, determining a first preset working mode corresponding to the first temperature interval as a target working mode, and the control object of the first preset working mode includes the thermostat; Controlling the operating state of the thermostat in the fuel cell system according to the target operating mode may include: The duty cycle output of the thermostat in the fuel cell system is controlled to be zero.

[0035] For example, when the stack entry temperature and the stack exit temperature are both within (-∞, 40°C), the first preset operating mode is determined as the target operating mode, and the duty cycle output of the thermostat in the fuel cell system is controlled to be zero to maintain a fully closed state; at this time, the minimum speed of the cold source water pump under this operating condition is determined according to the flow and speed correspondence table, and the heat source water pump remains in the closed state.

[0036] Specifically, the flow and speed correspondence table includes a correspondence table between the heat source water pump speed and flow and a correspondence table between the heat source water pump speed and flow; the current speed of the heat source water pump is determined according to the current flow of the heat source water pump and the correspondence table between the heat source water pump speed and flow, and the current speed of the heat source water pump is determined according to the current flow of the cold source water pump and the correspondence table between the cold source water pump speed and flow.

[0037] In the embodiment of the present disclosure, when the inlet temperature and outlet temperature of the fuel cell stack are at a low level, the duty cycle output of the thermostat is controlled to be zero, thereby controlling the cooling system in the fuel cell system to stop operating, preventing the fuel cell stack from being overcooled at low temperatures, thereby reducing energy consumption and improving energy utilization efficiency.

[0038] In a feasible implementation manner, determining the target operating mode from a plurality of preset operating modes according to the temperature information may include: When the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a second temperature interval, determining a second preset working mode corresponding to the second temperature interval as the target working mode, the lower limit value of the second temperature interval is greater than the upper limit value of the first temperature interval, and the control objects of the second preset working mode include the thermostat and the water pump; Controlling the operating states of a thermostat and a water pump in the fuel cell system according to the target operating mode may include: Determining a first temperature difference between a preset operating temperature of the engine and the stack exit temperature, and a first flow difference between an input flow of the thermostat and a preset target flow; The duty cycle of the thermostat is controlled according to the first temperature difference, and the rotation speed of the water pump is controlled according to the first flow difference.

[0039] It is worth noting that the preset operating temperature and the preset target flow rate can be preset according to the actual operating environment of the fuel cell system, and the present disclosure does not limit this.

[0040] For example, when the inlet temperature and the outlet temperature are both within the range of [40°C-55°C), the second preset operating mode is determined to be the target operating mode. At this time, the duty cycle of the thermostat is controlled according to a first temperature difference between the preset operating temperature of the engine and the outlet temperature, and the speed of the water pump is controlled according to a first flow difference between the input flow of the thermostat and the preset target flow.

[0041] In the embodiment of the present disclosure, when the inlet temperature and outlet temperature of the fuel cell stack are in the second temperature range, the duty cycle of the thermostat is controlled according to the first temperature difference to achieve precise regulation of the temperature of the fuel cell stack, and the speed of the water pump is controlled according to the first flow difference to ensure that the cooling system operates at an optimal flow rate. The precise control of temperature and flow can provide a more stable and suitable operating environment for the fuel cell stack, thereby reducing failures and performance degradation of the fuel cell stack caused by temperature fluctuations and insufficient flow.

[0042] In a feasible implementation manner, controlling the duty cycle of the thermostat according to the first temperature difference may include: When the first temperature difference is greater than zero, increasing the duty cycle of the thermostat; When the first temperature difference is less than zero, reducing the duty cycle of the thermostat; The controlling the rotation speed of the water pump according to the first flow difference comprises: When the first flow difference is greater than zero, reducing the rotation speed of the water pump; When the first flow difference is less than zero, the rotation speed of the water pump is increased.

[0043] For example, when the first temperature difference is greater than zero, the preset operating temperature of the engine is greater than the current stack temperature, and at this time, PID increases the rate of increase of the thermostat duty cycle according to the rate of increase of the first temperature difference; when the first temperature difference is less than zero, the preset operating temperature of the engine is less than the current stack temperature, and PID reduces the rate of decrease of the duty cycle according to the rate of decrease of the first temperature difference.

[0044] It is worth noting that if the duty cycle of the PID output is less than the minimum duty cycle under the working condition, the output will be based on the minimum duty cycle of the thermostat.

[0045] For example, when the first flow difference is less than zero, the error value between the input flow of the thermostat and the preset target flow is positive, and the speed of the water pump is reduced; when the first flow difference is less than zero, the error value between the input flow of the thermostat and the preset target flow is negative, and the speed of the water pump is increased.

[0046] It is worth noting that when the water line pressure is greater than 190kPa, the water pump speed output is reduced to the minimum speed and runs for a certain period of time. If the difference between the water line pressure and the fault threshold is greater than 20kPa, the PID speed control of the heat source water pump is restored and the cold source water pump maintains the minimum speed.

[0047] In a feasible implementation manner, determining the target operating mode from a plurality of preset operating modes according to the temperature information may include: When the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a third temperature interval, determining a third preset working mode corresponding to the third temperature interval as the target working mode, the lower limit value of the third temperature interval is greater than the upper limit value of the second temperature interval, and the control object of the third preset working mode includes the water pump; Controlling the operating state of the water pump in the fuel cell system according to the target operating mode may include: Determining a second temperature difference between a heat source outlet temperature and the stack entry temperature in the fuel cell system; When the second temperature difference is less than the first temperature difference threshold, determining a second flow difference between an output flow of the fuel cell system and a preset target flow; The rotation speed of the water pump is controlled according to the corresponding relationship between the preset rotation speed and the flow rate and the second flow rate difference.

[0048] For example, when both the inlet temperature and the outlet temperature are within [55°C, +∞), the third preset working mode is determined as the target working mode. At this time, the opening thermostat and the speed of the heat source water pump are controlled according to the PID. When the difference between the indication of the heat source outlet temperature sensor and the indication of the inlet temperature sensor is less than 8°C, the speed of the cold source water pump is adjusted according to the error value between the third flow meter and the preset target flow.

[0049] In a feasible implementation manner, the method may further include: Obtaining a new stack entry temperature and a new stack exit temperature in the third preset working mode; When the new stack entry temperature and the new stack exit temperature are both lower than the temperature threshold, determining the second preset operating mode as the new target operating mode; The step of controlling the operating states of the thermostat and the water pump in the fuel cell system according to the target operating mode may include: Determining a first temperature difference between a preset operating temperature of the engine and the stack exit temperature, and a first flow difference between an input flow of the thermostat and a preset target flow; The duty cycle of the thermostat is controlled according to the first temperature difference, and the rotation speed of the water pump is controlled according to the first flow difference.

[0050] For example, a new stack entry temperature and a new stack exit temperature are obtained in the third preset operating mode. If the new stack entry temperature and the new stack exit temperature are less than 50°C, the second preset operating mode is determined to be the target operating mode, and the duty cycle of the thermostat is controlled according to the temperature difference between the preset operating temperature of the engine and the new stack exit temperature, and the speed of the water pump is controlled according to the flow difference between the input flow of the thermostat and the preset target flow.

[0051] For method 2: determine the target working mode based on the temperature difference between the inlet temperature and the outlet temperature.

[0052] In a feasible implementation manner, determining the target operating mode from a plurality of preset operating modes according to the temperature information may include: Subtract the exit temperature from the entry temperature and take the absolute value to obtain a third temperature difference; When the third temperature difference is greater than or equal to the second temperature difference threshold, determining the second preset working mode as the target working mode, the control objects of the second preset working mode include the thermostat and the water pump; When the third temperature difference is less than the second temperature difference threshold, the third preset operating mode is determined as the target operating mode, and the control object of the third preset operating mode includes the water pump.

[0053] For example, the temperature difference between the inlet temperature and the outlet temperature is determined. If the temperature difference is greater than or equal to 15° C., the second preset operating mode is determined as the target operating mode. If the temperature difference is less than 15° C., the third preset operating mode is determined as the target operating mode.

[0054] In the embodiment of the present disclosure, the target operating mode is determined according to the temperature difference between the stack entry temperature and the stack exit temperature, which can achieve precise control of the temperature state of the fuel cell system, ensure that the fuel cell operates under optimal working conditions, and improve the performance and efficiency of the fuel cell system; the entire temperature control process does not require a complex sensor network and a complex control algorithm, and effective temperature control can be achieved simply by monitoring the temperature difference; and it is not only suitable for fuel cell systems, but can also be widely used in other fields that require precise temperature control, with strong adaptability.

[0055] In a feasible embodiment, when the target operating mode is the first preset operating mode and the second preset operating mode, the loading speed and power of the fuel cell system are protectively limited to reduce the impact of low operating temperature on the life of the fuel engine, thereby reducing the loss of the fuel cell engine.

[0056] In a feasible implementation, a thermostat minimum duty cycle table corresponding to the stack output temperature and the stack entry temperature within the first range is determined according to a pre-calibrated test, and when the target operating mode is the second preset operating mode and the third preset operating mode, PID regulation is performed to control the thermostat duty cycle.

[0057] For example, Figure 3 As shown, the temperature control method provided by the present disclosure may include the following steps: In step S31, the stack entry temperature A and stack exit temperature B of the fuel cell stack are obtained.

[0058] In step S32, it is determined whether A<40℃ and B<40℃ are satisfied. If so, step S33 is executed; if not, step S34 or step S39 is executed.

[0059] In step S33, the first preset working mode is determined as the target working mode.

[0060] In step S34, it is determined whether 40°C≤A<55°C and 40°C≤B<55°C are satisfied. If so, step S35 is executed; if not, steps S36 to S38 are executed.

[0061] In step S35, the second preset working mode is determined as the target working mode.

[0062] In step S36, the third preset working mode is determined as the target working mode.

[0063] In step S37, a new stack entry temperature A' and a new stack exit temperature B' are obtained.

[0064] In step S38, it is determined whether A`<50°C and B`<50°C are satisfied. If so, the process returns to step S35; if not, the process returns to step S36.

[0065] In step S39, the temperature difference C between the inlet temperature A and the outlet temperature B is determined.

[0066] In step S310, it is determined whether C≥15°C is satisfied. If so, the process returns to step S35; if not, the process returns to step S36.

[0067] In step S311, the operating state of the thermostat and / or the water pump is controlled according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

[0068] The disclosed embodiment sets the working modes of the thermostat and the water pump in stages according to the historical inlet and outlet temperatures of the fuel cell engine, determines the flow rate of the coolant according to the heat dissipation demand, determines the lower limit of the PID-regulated water pump speed at the flow rate value, and determines the upper limit of the water pump speed according to the water line pressure, thereby avoiding fuel cell engine failure caused by excessive temperature difference between the inlet and outlet of the water line and excessive water pressure during cold loading; and determines the minimum thermostat working duty cycle that meets the current heat dissipation demand according to the operating mode of the fuel cell engine, and when the operating temperature is lower than the target temperature, outputs the temperature at the minimum duty cycle for a certain time, and adjusts the operating state of the thermostat and / or the water pump according to the preset working mode corresponding to the temperature range in which the inlet and outlet temperatures of the fuel cell stack are simultaneously located, so as to effectively control the temperature fluctuation of the fuel cell engine in the cold state.

[0069] Based on the same inventive concept, the present disclosure also provides a temperature control device, such as Figure 4 As shown, the temperature control device includes an acquisition module 401 and an execution module 402 .

[0070] The acquisition module 401 is configured to acquire temperature information of a fuel cell stack in a fuel cell system, wherein the temperature information includes an inlet temperature and an outlet temperature. The execution module 402 is configured to determine a target operating mode from a plurality of preset operating modes according to the temperature information, and control the operating state of the thermostat and / or the water pump in the fuel cell system according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

[0071] In the embodiment of the present disclosure, the inlet temperature and outlet temperature of the fuel cell stack are obtained, so that the heat distribution and heat dissipation requirements of the fuel cell system can be determined more accurately; because different working environments and working conditions have different requirements for the fuel cell system, the target working mode that best suits the current working conditions is determined from multiple preset working modes based on the inlet temperature and outlet temperature, so that the fuel cell system can flexibly adapt to different working environments and working conditions; the operating state of the thermostat and / or water pump is controlled according to the target working mode to reduce the fluctuation of the engine's operating temperature and avoid excessively high or low operating temperatures, thereby reducing the damage of thermal stress to the internal materials of the fuel cell, improving the operating life and working efficiency of the fuel cell system, and helping the fuel cell system to maintain the best operating state under different working conditions, thereby improving the reliability and stability of the fuel cell system.

[0072] Furthermore, the execution module 402 is configured to set a plurality of temperature intervals in sections according to the historical operating temperature of the fuel cell stack, each of the temperature intervals corresponding to a preset operating mode; The stack entry temperature and the stack exit temperature are matched with the multiple temperature intervals respectively, and a preset working mode corresponding to a temperature interval where both the stack entry temperature and the stack exit temperature exist is determined as a target working mode.

[0073] Further, the execution module 402 is configured to determine, when the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a first temperature interval, a first preset working mode corresponding to the first temperature interval as a target working mode, wherein the control object of the first preset working mode includes the thermostat; The duty cycle output of the thermostat in the fuel cell system is controlled to be zero.

[0074] Further, the execution module 402 is configured to determine that a second preset working mode corresponding to the second temperature interval is a target working mode when the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a second temperature interval, the lower limit value of the second temperature interval is greater than the upper limit value of the first temperature interval, and the control objects of the second preset working mode include the thermostat and the water pump; Determining a first temperature difference between a preset operating temperature of the engine and the stack exit temperature, and a first flow difference between an input flow of the thermostat and a preset target flow; The duty cycle of the thermostat is controlled according to the first temperature difference, and the rotation speed of the water pump is controlled according to the first flow difference.

[0075] Further, the execution module 402 is configured to increase the duty cycle of the thermostat when the first temperature difference is greater than zero; When the first temperature difference is less than zero, reducing the duty cycle of the thermostat; When the first flow difference is greater than zero, reducing the rotation speed of the water pump; When the first flow difference is less than zero, the rotation speed of the water pump is increased.

[0076] Further, the execution module 402 is configured to determine, when the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a third temperature interval, a third preset working mode corresponding to the third temperature interval as the target working mode, the lower limit value of the third temperature interval is greater than the upper limit value of the second temperature interval, and the control object of the third preset working mode includes the water pump; Determining a second temperature difference between a heat source outlet temperature and the stack entry temperature in the fuel cell system; When the second temperature difference is less than the first temperature difference threshold, determining a second flow difference between an output flow of the fuel cell system and a preset target flow; The rotation speed of the water pump is controlled according to the corresponding relationship between the preset rotation speed and the flow rate and the second flow rate difference.

[0077] Further, the execution module 402 is configured to obtain a new stack entry temperature and a new stack exit temperature in the third preset working mode; When the new stack entry temperature and the new stack exit temperature are both lower than the temperature threshold, determining the second preset operating mode as the new target operating mode; Determining a first temperature difference between a preset operating temperature of the engine and the stack exit temperature, and a first flow difference between an input flow of the thermostat and a preset target flow; The duty cycle of the thermostat is controlled according to the first temperature difference, and the rotation speed of the water pump is controlled according to the first flow difference.

[0078] Furthermore, the execution module 402 is configured to subtract the exit temperature from the entry temperature and take the absolute value to obtain a third temperature difference; When the third temperature difference is greater than or equal to the second temperature difference threshold, determining the second preset working mode as the target working mode, the control objects of the second preset working mode include the thermostat and the water pump; When the third temperature difference is less than the second temperature difference threshold, the third preset operating mode is determined as the target operating mode, and the control object of the third preset operating mode includes the water pump.

[0079] Regarding the temperature control device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0080] Based on the same inventive concept, the present disclosure also provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the above-mentioned temperature control method.

[0081] In the embodiment of the present disclosure, the inlet temperature and outlet temperature of the fuel cell stack are obtained, so that the heat distribution and heat dissipation requirements of the fuel cell system can be determined more accurately; because different working environments and working conditions have different requirements for the fuel cell system, the target working mode that best suits the current working conditions is determined from multiple preset working modes based on the inlet temperature and outlet temperature, so that the fuel cell system can flexibly adapt to different working environments and working conditions; the operating state of the thermostat and / or water pump is controlled according to the target working mode to reduce the fluctuation of the engine's operating temperature and avoid excessively high or low operating temperatures, thereby reducing the damage of thermal stress to the internal materials of the fuel cell, improving the operating life and working efficiency of the fuel cell system, and helping the fuel cell system to maintain the best operating state under different working conditions, thereby improving the reliability and stability of the fuel cell system.

[0082] Figure 5 FIG. 5 is a block diagram of an electronic device 500 according to an exemplary embodiment. Figure 5 As shown, the electronic device 500 may include: a processor 501 , a memory 502 . The electronic device 500 may also include one or more of a multimedia component 503 , an input / output (I / O) interface 504 , and a communication component 505 .

[0083] The processor 501 is used to control the overall operation of the electronic device 500 to complete all or part of the steps in the above-mentioned temperature control method. The memory 502 is used to store various types of data to support the operation of the electronic device 500, and these data may include instructions for any application or method used to operate on the electronic device 500, and application-related data, such as temperature information, stacking temperature, stacking temperature, temperature range, and preset working mode, etc. The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 503 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 502 or sent through the communication component 505. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 504 provides an interface between the processor 501 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 505 may include: Wi-Fi module, Bluetooth module, NFC module.

[0084] In an exemplary embodiment, the electronic device 500 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to perform the above-mentioned temperature control method.

[0085] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned temperature control method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 502 including program instructions, and the above-mentioned program instructions can be executed by the processor 501 of the electronic device 500 to complete the above-mentioned temperature control method.

[0086] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a processor. When the computer program is executed by the processor, the steps of the above-mentioned temperature control method are implemented.

[0087] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0088] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0089] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A temperature control method, characterized in that: The method comprises: Acquiring temperature information of a fuel cell stack in a fuel cell system, wherein the temperature information includes a stack entry temperature and a stack exit temperature; A target operating mode is determined from a plurality of preset operating modes according to the temperature information, and the operating state of a thermostat and / or a water pump in the fuel cell system is controlled according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

2. The temperature control method according to claim 1, characterized in that: The method further comprises: According to the historical operating temperature of the fuel cell stack, a plurality of temperature intervals are set in sections, each of the temperature intervals corresponds to a preset operating mode; Determining a target operating mode from a plurality of preset operating modes according to the temperature information includes: The stack entry temperature and the stack exit temperature are matched with the multiple temperature intervals respectively, and a preset working mode corresponding to a temperature interval where both the stack entry temperature and the stack exit temperature exist is determined as a target working mode.

3. The temperature control method according to claim 2, characterized in that: Determining a target operating mode from a plurality of preset operating modes according to the temperature information includes: When the temperature interval in which both the stack entry temperature and the stack exit temperature exist is a first temperature interval, determining a first preset working mode corresponding to the first temperature interval as a target working mode, and the control object of the first preset working mode includes the thermostat; Controlling the operating state of a thermostat in the fuel cell system according to the target operating mode includes: The duty cycle output of the thermostat in the fuel cell system is controlled to be zero.

4. The temperature control method according to claim 2, characterized in that: Determining a target operating mode from a plurality of preset operating modes according to the temperature information includes: When the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a second temperature interval, determining a second preset working mode corresponding to the second temperature interval as the target working mode, the lower limit value of the second temperature interval is greater than the upper limit value of the first temperature interval, and the control objects of the second preset working mode include the thermostat and the water pump; Controlling the operating states of a thermostat and a water pump in the fuel cell system according to the target operating mode includes: Determining a first temperature difference between a preset operating temperature of the engine and the stack exit temperature, and a first flow difference between an input flow of the thermostat and a preset target flow; The duty cycle of the thermostat is controlled according to the first temperature difference, and the rotation speed of the water pump is controlled according to the first flow difference.

5. The temperature control method according to claim 4, characterized in that: The step of controlling the duty cycle of the thermostat according to the first temperature difference comprises: When the first temperature difference is greater than zero, increasing the duty cycle of the thermostat; When the first temperature difference is less than zero, reducing the duty cycle of the thermostat; The controlling the rotation speed of the water pump according to the first flow difference comprises: When the first flow difference is greater than zero, reducing the rotation speed of the water pump; When the first flow difference is less than zero, the rotation speed of the water pump is increased.

6. The temperature control method according to claim 2, characterized in that: Determining a target operating mode from a plurality of preset operating modes according to the temperature information includes: When the temperature interval in which the stack entry temperature and the stack exit temperature coexist is a third temperature interval, determining a third preset working mode corresponding to the third temperature interval as the target working mode, the lower limit value of the third temperature interval is greater than the upper limit value of the second temperature interval, and the control object of the third preset working mode includes the water pump; Controlling the operating state of the water pump in the fuel cell system according to the target operating mode includes: Determining a second temperature difference between a heat source outlet temperature and the stack entry temperature in the fuel cell system; When the second temperature difference is less than the first temperature difference threshold, determining a second flow difference between an output flow of the fuel cell system and a preset target flow; The rotation speed of the water pump is controlled according to the corresponding relationship between the preset rotation speed and the flow rate and the second flow rate difference.

7. The temperature control method according to claim 6, characterized in that: The method further comprises: Obtaining a new stack entry temperature and a new stack exit temperature in the third preset working mode; When the new stack entry temperature and the new stack exit temperature are both lower than the temperature threshold, determining the second preset operating mode as the new target operating mode; The controlling the operating states of the thermostat and the water pump in the fuel cell system according to the target operating mode includes: Determining a first temperature difference between a preset operating temperature of the engine and the stack exit temperature, and a first flow difference between an input flow of the thermostat and a preset target flow; The duty cycle of the thermostat is controlled according to the first temperature difference, and the rotation speed of the water pump is controlled according to the first flow difference.

8. The temperature control method according to claim 1, characterized in that: Determining a target operating mode from a plurality of preset operating modes according to the temperature information includes: Subtract the exit temperature from the entry temperature and take the absolute value to obtain a third temperature difference; When the third temperature difference is greater than or equal to the second temperature difference threshold, determining the second preset working mode as the target working mode, the control objects of the second preset working mode include the thermostat and the water pump; When the third temperature difference is less than the second temperature difference threshold, the third preset operating mode is determined as the target operating mode, and the control object of the third preset operating mode includes the water pump.

9. A temperature control device, characterized in that: The device comprises: An acquisition module is configured to acquire temperature information of a fuel cell stack in a fuel cell system, wherein the temperature information includes a stack entry temperature and a stack exit temperature; An execution module is configured to determine a target operating mode from a plurality of preset operating modes according to the temperature information, and control the operating state of a thermostat and / or a water pump in the fuel cell system according to the target operating mode to reduce fluctuations in the operating temperature of the engine in the fuel cell system.

10. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the method according to any one of claims 1 to 8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

Images