Cooling Control Method and Device for Fuel Cell Engine and Auxiliary Machine

Abstract

The present invention discloses a cooling control method and device for a fuel cell engine and auxiliary machines. The method includes: obtaining a first inlet temperature value of the coolant when entering the stack of the fuel cell engine on a first cooling circuit, and obtaining a second inlet temperature value of the coolant when entering the auxiliary machines of the fuel cell engine on a second cooling circuit; determining control modes of a first temperature regulating component and a second temperature regulating component according to the magnitude relationships between the first inlet temperature value and the second inlet temperature value and corresponding temperature thresholds respectively; controlling the first temperature regulating component and the second temperature regulating component according to the control modes, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machines. The present invention solves the technical problem in the related art that the temperatures of the coolant in the cooling circuits of the fuel cell engine and the auxiliary machines cannot be adjusted according to the actual working conditions, which affects the operation efficiency of the fuel cell engine.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell engine heat dissipation, and in particular, to a cooling control method and device for a fuel cell engine and auxiliary machines. Background Technique

[0002] During the operation of a fuel cell engine, the water temperature requirement is very high. The inlet temperature of the fuel cell stack must be maintained within the range of 60±2°C to ensure the efficient operation of the engine. At the same time, the engine auxiliary machines including an air compressor, an air compressor controller, an intercooler, and a hydrogen circulation pump all need additional cooling during operation to enable these auxiliary machines to be in a stable working state for a long time. On the one hand, the engine directly drives the vehicle to run. On the other hand, when the engine power exceeds the power required for vehicle driving, the excess power will be supplied to the power battery. When the engine supplies power to the power battery, a DC / DC is required for voltage conversion, and the DC / DC also needs low-temperature cooling during operation. Usually, the DC / DC is provided to the vehicle factory as part of the fuel cell engine. Therefore, in the overall design process of the engine, the design of the cooling circuit is very important. At the same time, due to the very limited space in the vehicle, if too many radiators are required, the vehicle layout cannot be arranged.

[0003] Regarding the above-mentioned defects, in the related art, the cooling circuit of the fuel cell engine has been designed, specifically including two cooling circuits. The first cooling circuit includes: a water tank, a water pump, and an intercooler. The second cooling circuit includes: an air compressor and its controller, a DC / DC, a motor and its controller. This cooling system is used for passenger cars, but not for commercial vehicles because the water flow rate of the commercial vehicle cooling system is large. At the same time, in order to enable the engine to reach the temperature with the highest efficiency as soon as possible, a three-way ball valve is added outside the engine radiator, and at the same time, the heat dissipation requirements for the air compressor and its controller, the intercooler, etc. are relatively high. Moreover, the first cooling circuit includes a water pump and an intercooler, and when the first cooling circuit is running, the water temperature rises very slowly and cannot quickly reach the optimal water temperature value. The second cooling circuit only gives the cooled components, and no description is made regarding the water temperature control of the cooled components.

[0004] In view of the problem that the temperature of the coolant in the cooling circuit of the fuel cell engine and the auxiliary machines in the related art cannot be adjusted according to the actual working conditions, which affects the operation efficiency of the fuel cell engine, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present invention provide a cooling control method and device for a fuel cell engine and auxiliary machines, so as to at least solve the technical problem that the temperature of the coolant in the cooling circuit of the fuel cell engine and the auxiliary machines in the related art cannot be adjusted according to the actual working conditions, which affects the operation efficiency of the fuel cell engine.

[0006] According to one aspect of an embodiment of the present invention, a cooling control method for a fuel cell engine and auxiliary machines is provided, including: after the fuel cell engine is started, obtaining the temperature value of the coolant when it enters the stack of the fuel cell engine on the first cooling circuit to obtain a first inlet temperature value, and obtaining the temperature value of the coolant when it enters the auxiliary machines of the fuel cell engine on the second cooling circuit to obtain a second inlet temperature value, where the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machines, and the auxiliary machines are used to adjust preset parameters that affect the first inlet temperature value, and the preset parameters at least include: air intake volume, hydrogen circulation volume; determining the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determining the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, where the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling circuit; controlling the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machines.

[0007] Optionally, the temperature adjustment component includes: a first thermistor and a second thermistor, where one end of the first thermistor is connected to one end of a temperature sensor, and the other end is connected to a flow rate adjustment component; one end of the second thermistor is connected to the radiator of the fuel cell engine, and the other end is connected to the flow rate adjustment component; the temperature sensor is used to obtain the first inlet temperature value, and the flow rate adjustment component is used to adjust the flow rate of the coolant on the first cooling circuit; where determining the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold includes: when it is determined that the first inlet temperature value is less than the first temperature threshold, determining that the control modes of the first thermistor and the second thermistor are started simultaneously; when it is determined that the first inlet temperature value is greater than the first temperature threshold and less than the second temperature threshold, determining that the control mode of the first thermistor is closed and the control mode of the second thermistor is started; when it is determined that the first inlet temperature value is greater than the second temperature threshold, determining that the control modes of the first thermistor and the second thermistor are closed simultaneously.

[0008] Optionally, the cooling control method for the fuel cell engine and auxiliary machine further includes one of the following: when it is determined that the actual required power of the fuel cell engine increases or decreases, adjusting the rotational speed of the water pump on the first cooling circuit so that the first inlet temperature value reaches the set temperature value, where the water pump is located between the flow regulating component and the fuel cell stack; adjusting the opening degree of the flow regulating component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

[0009] Optionally, the temperature regulating component includes: a cooling fan and a refrigerator. The cooling fan is located on one side of the radiator in the second cooling circuit and is used to regulate the temperature of the radiator. The refrigerator is arranged on the second cooling circuit and is used to regulate the temperature of the coolant in the second cooling circuit. The auxiliary machine includes: an air compressor and an intercooler. Wherein, according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, determining the control mode of the second temperature regulating component includes: when it is determined that the second inlet temperature value is lower than the third temperature threshold, determining that the control mode of the refrigerator is off, and the control mode of the air compressor and the intercooler is to supply antifreeze to the air compressor and the intercooler; when it is determined that the second inlet temperature value is higher than the third temperature threshold, determining that the control mode of the refrigerator is on, and the control mode of the air compressor and the intercooler is to stop the coolant from flowing to the air compressor and the intercooler.

[0010] Optionally, the auxiliary machine includes: a voltage converter and a hydrogen circulation pump. The voltage converter is used to convert the power output by the fuel cell engine, and the hydrogen circulation pump is used to control the hydrogen circulation amount. The cooling control method for the fuel cell engine and auxiliary machine further includes: after the fuel cell engine is started, determining the required heat dissipation power of the auxiliary machine; determining the flow rate of the coolant on the second cooling circuit according to the heat dissipation power; determining the opening degree of the control valve on the second cooling circuit according to the magnitude of the flow rate, where the control valve includes: a first control valve and a second control valve. The first control valve is used to control the flow rate of the coolant flowing through the voltage converter, and the second control valve is used to control the flow rate of the coolant flowing through the hydrogen circulation pump. The flow rate is positively correlated with the opening degree of the control valve.

[0011] Optionally, determining the required heat dissipation power of the auxiliary machine includes: obtaining the first actual required power of the target vehicle where the fuel cell engine is located; determining the second actual required power of the fuel cell corresponding to the fuel cell engine according to the first actual required power; determining the load current of the fuel cell according to the second actual required power; determining the required heat dissipation power of the auxiliary machine according to the load current.

[0012] Optionally, the cooling control method for the fuel cell engine and its auxiliaries further includes: determining the rotational speed of the cooling fan according to the magnitude of the heat dissipation power; controlling the cooling fan to operate at the rotational speed to adjust the temperature of the radiator.

[0013] Optionally, determining the flow rate of the coolant on the second cooling loop according to the heat dissipation power includes: determining the flow rate corresponding to the heat dissipation power according to a preset relationship between the heat dissipation power and the coolant flow rate, where the preset relationship is determined in advance according to the corresponding relationship between the flow rate of the coolant on the second cooling loop corresponding to the auxiliaries at different heat dissipation powers; determining the flow rate corresponding to the heat dissipation power as the flow rate of the coolant on the second cooling loop.

[0014] According to another aspect of the embodiments of the present invention, there is also provided a cooling control device for a fuel cell engine and its auxiliaries, including: an acquisition unit, configured to, after the fuel cell engine is started, acquire the temperature value of the coolant entering the stack of the fuel cell engine on the first cooling loop to obtain a first inlet temperature value, and acquire the temperature value of the coolant entering the auxiliaries of the fuel cell engine on the second cooling loop to obtain a second inlet temperature value, where the first cooling loop is used to cool the fuel cell engine, the second cooling loop is used to cool the auxiliaries, and the auxiliaries are used to adjust preset parameters that affect the first inlet temperature value, and the preset parameters at least include: air intake volume, hydrogen circulation volume; a determination unit, configured to determine the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determine the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, where the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling loop, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling loop; a cooling unit, configured to control the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling loop cools the fuel cell engine, and the coolant in the second cooling loop cools the auxiliaries.

[0015] Optionally, the temperature adjustment component includes: a first thermistor and a second thermistor, wherein one end of the first thermistor is connected to one end of the temperature sensor, and the other end is connected to the flow rate adjustment component; one end of the second thermistor is connected to the radiator of the fuel cell engine, and the other end is connected to the flow rate adjustment component; the temperature sensor is used to obtain the first inlet temperature value, and the flow rate adjustment component is used to adjust the flow rate of the coolant on the first cooling circuit; wherein, the determination unit includes: a first determination module, configured to determine that the control modes of the first thermistor and the second thermistor are started simultaneously when it is determined that the first inlet temperature value is less than the first temperature threshold; a second determination module, configured to determine that the control mode of the first thermistor is turned off and the control mode of the second thermistor is started when it is determined that the first inlet temperature value is greater than the first temperature threshold and less than the second temperature threshold; a third determination module, configured to determine that the control modes of the first thermistor and the second thermistor are turned off simultaneously when it is determined that the first inlet temperature value is greater than the second temperature threshold.

[0016] Optionally, the cooling control device of the fuel cell engine and auxiliary machine further includes one of the following: a first adjustment unit, configured to adjust the rotation speed of the water pump on the first cooling circuit to make the first inlet temperature value reach the set temperature value when it is determined that the actual required power of the fuel cell engine increases or decreases, wherein the water pump is located between the flow rate adjustment component and the stack; a second adjustment unit, configured to adjust the opening degree of the flow rate adjustment component on the first cooling circuit to make the first inlet temperature value reach the set temperature value.

[0017] Optionally, the temperature adjustment component includes: a cooling fan and a cooler, wherein the cooling fan is located on one side of the radiator in the second cooling circuit and is used to adjust the temperature of the radiator; the cooler is arranged on the second cooling circuit and is used to adjust the temperature of the coolant in the second cooling circuit; the auxiliary machine includes: an air compressor and an intercooler; wherein, the determination unit includes: a fourth determination module, configured to determine that the control mode of the cooler is turned off and the control modes of the air compressor and the intercooler are to supply antifreeze to the air compressor and the intercooler when it is determined that the second inlet temperature value is lower than the third temperature threshold; a fifth determination module, configured to determine that the control mode of the cooler is turned on and the control modes of the air compressor and the intercooler are to stop the coolant from flowing to the air compressor and the intercooler when it is determined that the second inlet temperature value is higher than the third temperature threshold.

[0018] Optionally, the auxiliary machine includes: a voltage converter and a hydrogen circulation pump. Among them, the voltage converter is used to convert the power output by the fuel cell engine, and the hydrogen circulation pump is used to control the hydrogen circulation volume. The cooling control device of the fuel cell engine and the auxiliary machine further includes: the determination unit, which is further used to determine the heat dissipation power required by the auxiliary machine after the fuel cell engine is started; the determination unit, which is further used to determine the flow rate of the coolant on the second cooling circuit according to the heat dissipation power; the determination unit, which is further used to determine the opening degree of the control valve on the second cooling circuit according to the magnitude of the flow rate. Among them, the control valve includes: a first control valve and a second control valve. The first control valve is used to control the flow rate of the coolant flowing through the voltage converter, and the second control valve is used to control the flow rate of the coolant flowing through the hydrogen circulation pump. The flow rate is positively correlated with the opening degree of the control valve.

[0019] Optionally, the determination unit includes: an acquisition module, which is used to acquire the first actual demand power of the target vehicle where the fuel cell engine is located; a sixth determination module, which is used to determine the second actual demand power of the fuel cell corresponding to the fuel cell engine according to the first actual demand power; a seventh determination module, which is used to determine the load current of the fuel cell according to the second actual demand power; an eighth determination module, which is used to determine the heat dissipation power required by the auxiliary machine according to the load current.

[0020] Optionally, the cooling control device of the fuel cell engine and the auxiliary machine further includes: the determination unit, which is further used to determine the rotation speed of the cooling fan according to the magnitude of the heat dissipation power; a control unit, which is used to control the cooling fan to operate at the rotation speed to adjust the temperature of the radiator.

[0021] Optionally, determining the flow rate of the coolant on the second cooling circuit according to the heat dissipation power includes: a ninth determination module, which is used to determine the flow rate corresponding to the heat dissipation power according to the preset relationship between the heat dissipation power and the coolant flow rate, where the preset relationship is determined in advance according to the corresponding relationship between the flow rate of the coolant on the second cooling circuit corresponding to the auxiliary machine under different heat dissipation powers; a tenth determination module, which is used to determine the flow rate corresponding to the heat dissipation power as the flow rate of the coolant on the second cooling circuit.

[0022] According to another aspect of the embodiments of the present invention, a vehicle is further provided, and the vehicle uses the cooling control method of the fuel cell engine and the auxiliary machine described in any one of the above.

[0023] According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium, where the computer-readable storage medium includes a stored program, and the program executes the cooling control method for the fuel cell engine and auxiliary machine described in any one of the above.

[0024] According to another aspect of the embodiments of the present invention, there is also provided a processor, where the processor is used to run a program, and when the program runs, it executes the cooling control method for the fuel cell engine and auxiliary machine described in any one of the above.

[0025] In the embodiments of the present invention, after the fuel cell engine is started, the temperature value of the coolant entering the stack of the fuel cell engine on the first cooling circuit is obtained to get the first inlet temperature value, and the temperature value of the coolant entering the auxiliary machine of the fuel cell engine on the second cooling circuit is obtained to get the second inlet temperature value. Herein, the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machine, and the auxiliary machine is used to adjust preset parameters that affect the first inlet temperature value. The preset parameters at least include: air intake volume, hydrogen circulation volume; according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, the control mode of the first temperature adjustment component is determined, and according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, the control mode of the second temperature adjustment component is determined. Herein, the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling circuit; the first temperature adjustment component and the second temperature adjustment component are controlled according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine. Through the cooling control method for the fuel cell engine and auxiliary machine, the control mode of the temperature adjustment component on the cooling circuit is determined according to the stack inlet temperature of the fuel cell engine and the temperature value when the coolant enters the auxiliary machine, and the temperature adjustment component is adjusted based on this control mode so that the coolant can quickly control the stack of the fuel cell engine within a reasonable temperature range, improving the operating efficiency of the fuel cell engine, and further solving the technical problem that the temperature of the coolant in the cooling circuits of the fuel cell engine and the auxiliary machine cannot be adjusted according to the actual working conditions in the related art, which affects the operating efficiency of the fuel cell engine. Description of the Drawings

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0027] Figure 1It is a flowchart of a cooling control method for a fuel cell engine and auxiliary machines according to an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of a cooling circuit of a fuel cell engine according to an embodiment of the present invention;

[0029] Figure 3 It is a flowchart of a control method for a cooling circuit of a fuel cell engine according to an embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of a cooling circuit of an auxiliary machine according to an embodiment of the present invention;

[0031] Figure 5 It is a flowchart of a control method for a cooling circuit of an auxiliary machine according to an embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of a cooling control device for a fuel cell engine and auxiliary machines according to an embodiment of the present invention. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0035] For the convenience of description, some nouns or terms related to the embodiments of the present application are explained as follows:

[0036] Cooling circuit: A device that dissipates heat into the air to prevent the engine from overheating.

[0037] DC / DC converter: A device that converts a DC power source of one voltage level into a DC power source of another voltage level.

[0038] Control valve: A device that changes its state by receiving a control signal output from a mediation control unit.

[0039] Particle filter: A filter used to filter impurities with a diameter of more than 100 μm.

[0040] Hydrogen circulation pump: A device used for hydrogen circulation.

[0041] As introduced in the background art, in the related art, the temperature of the coolant in the cooling circuit of the fuel cell engine and the auxiliary machine cannot be adjusted according to the actual working conditions, which affects the operating efficiency of the fuel cell engine. To solve this problem, an embodiment of the present invention provides a cooling control method and device for a fuel cell engine and an auxiliary machine.

[0042] It should be noted that the cooling control method for the fuel cell engine and the auxiliary machine in the embodiment of the present invention is divided into two cooling circuits. One cooling circuit is the cooling circuit of the stack of the engine (fuel cell engine), that is, the first cooling circuit; the other cooling circuit is the cooling circuit of the auxiliary machine, that is, the second cooling circuit.

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0044] According to an embodiment of the present invention, a method embodiment of a cooling control method for a fuel cell engine and an auxiliary machine is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0045] Figure 1 is a flowchart of a cooling control method for a fuel cell engine and an auxiliary machine according to an embodiment of the present invention. As Figure 1 shown, the cooling control method for the fuel cell engine and the auxiliary machine includes the following steps:

[0046] Step S102, after the fuel cell engine is started, obtain the temperature value of the coolant when it enters the stack of the fuel cell engine on the first cooling circuit to obtain the first inlet temperature value, and obtain the temperature value of the coolant when it enters the auxiliary machine of the fuel cell engine on the second cooling circuit to obtain the second inlet temperature value. Among them, the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machine, and the auxiliary machine is used to adjust preset parameters that affect the first inlet temperature value. The preset parameters at least include: air intake volume, hydrogen circulation volume.

[0047] In this embodiment, the cooling liquid level is taken as water for illustration. The first cooling circuit can be used to cool the fuel cell engine. Specifically, it cools the stack of the fuel cell engine. In this cooling circuit, under normal circumstances, the radiator enters the interior of the stack through the particulate filter. After the water circuit exits the stack, it enters the engine radiator under the action of the electric water pump. During the engine exhaust process, there is a branch air pipe that enters the expansion tank through the ion filter to facilitate engine exhaust. At the same time, water is supplied to the engine from the expansion tank.

[0048] Since the fuel cell engine needs the action of BOP auxiliary machines such as an air compressor, a hydrogen circulation pump, and an intercooler to control the air intake volume, hydrogen circulation volume, and intake air temperature drop to meet the stack intake air temperature range during operation. Therefore, a second cooling circuit needs to be set up to cool the auxiliary machines, so that the auxiliary machines can efficiently control the air intake volume, hydrogen circulation volume, and intake air temperature drop to meet the stack intake air temperature range.

[0049] In this step, temperature sensors can be set in the first cooling circuit and the second cooling circuit to detect the stack inlet temperature and the temperature value of the coolant when it enters the auxiliary machines on the second cooling circuit, which is convenient for subsequent adjustment of the coolant temperature, so that the coolant can cool the fuel cell engine and the auxiliary machines at the optimal temperature.

[0050] Step S104, determine the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determine the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, where the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling circuit.

[0051] In this embodiment, by setting the temperature threshold, the first inlet temperature value and the second inlet temperature value are respectively compared with the corresponding temperature threshold, and based on the comparison results, the control mode of the first temperature adjustment component in the first cooling circuit and the control mode of the second temperature adjustment component in the second cooling circuit are determined, so that the coolant is maintained within a reasonable temperature range, and thus the fuel cell engine and the auxiliary machines can be cooled better.

[0052] Among them, the temperature threshold here can be determined according to test data; of course, it can also be determined by other methods, which are not specifically limited here.

[0053] Step S106: Control the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine.

[0054] In this embodiment, temperature adjustment components are respectively arranged on the first cooling circuit and the second cooling circuit, that is, the first temperature adjustment component and the second temperature adjustment component, so that the temperature of the coolant in the first cooling circuit and the second cooling circuit can be adjusted specifically, enabling the auxiliary machine to better control the air intake volume, hydrogen circulation volume, and intake air temperature drop to meet the fuel cell stack intake air temperature range, and enabling the fuel cell stack of the fuel cell engine to be quickly controlled within a reasonable temperature range, thereby enabling the fuel cell compressor to operate efficiently.

[0055] As can be seen from the above, in the embodiment of the present invention, after the fuel cell engine is started, the temperature sensor is triggered to obtain the first inlet temperature value when the coolant on the first cooling circuit enters the fuel cell stack of the fuel cell engine, and obtain the second inlet temperature value when the coolant on the second cooling circuit enters the auxiliary machine of the fuel cell engine; according to the magnitude relationship between the first inlet temperature value and the second inlet temperature value and the corresponding temperature thresholds respectively, determine the control modes of the first temperature adjustment component and the second temperature adjustment component; control the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine, achieving the purpose of determining the control mode of the temperature adjustment component on the cooling circuit according to the fuel cell stack inlet temperature of the fuel cell engine and the temperature value when the coolant enters the auxiliary machine, and adjusting the temperature adjustment component based on this control mode to quickly control the fuel cell stack of the fuel cell engine within a reasonable temperature range, improving the operation efficiency of the fuel cell engine.

[0056] Therefore, through the technical solution provided by the embodiment of the present invention, the technical problem in the related art that the temperature of the coolant in the cooling circuits of the fuel cell engine and the auxiliary machine cannot be adjusted according to the actual working conditions, affecting the operation efficiency of the fuel cell engine, is solved.

[0057] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the implementation process of the cooling control method for the fuel cell engine and the auxiliary machine of the present invention will be described in detail below with specific embodiments.

[0058] First, in the first cooling circuit, the temperature regulating component may include: a first thermistor and a second thermistor. Wherein, one end of the first thermistor is connected to one end of the temperature sensor, and the other end is connected to the flow regulating component; one end of the second thermistor is connected to the radiator of the fuel cell engine, and the other end is connected to the flow regulating component; the temperature sensor is used to obtain the first inlet temperature value, and the flow regulating component is used to regulate the flow rate of the coolant in the first cooling circuit; wherein, according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, the control mode of the first temperature regulating component is determined, including: when it is determined that the first inlet temperature value is less than the first temperature threshold, it is determined that the control modes of the first thermistor and the second thermistor are to be started simultaneously; when it is determined that the first inlet temperature value is greater than the first temperature threshold and less than the second temperature threshold, it is determined that the control mode of the first thermistor is to be closed and the control mode of the second thermistor is to be started; when it is determined that the first inlet temperature value is greater than the second temperature threshold, it is determined that the control modes of the first thermistor and the second thermistor are to be closed simultaneously.

[0059] Figure 2 is a schematic diagram of the cooling circuit of the fuel cell engine according to an embodiment of the present invention, as Figure 2 shown, including: the engine radiator (i.e., the radiator) of the fuel cell engine, the particulate filter, the inlet temperature sensor (i.e., the temperature sensor), the fuel cell stack, PTC1 (i.e., the first thermistor), PTC2 (i.e., the second thermistor), the three-way ball valve 3 (i.e., the flow regulating component), the electric water pump, the expansion tank, and the ion filter.

[0060] In this embodiment, under normal circumstances, the radiator enters the interior of the fuel cell stack through the particulate filter. After the water circuit exits the fuel cell stack, it enters the engine radiator under the action of the electric water pump. During the engine exhaust process, a branch air pipe enters the expansion tank through the ion filter to facilitate engine exhaust. At the same time, water is supplied to the engine from the expansion tank. The first cooling circuit of the engine is controlled by an electric three-way ball valve. When the water temperature is lower than N2 (i.e., the second temperature threshold), the engine cooling water circuit undergoes a small cycle. After exiting the radiator, it returns to the radiator through the electric three-way ball valve. When the water temperature is higher than N3 (a preset temperature threshold), the water exiting the radiator passes through the fuel cell stack and returns to the radiator through the three-way ball valve under the action of the electric water pump. During the small cycle, the temperature of the water entering the engine is detected by the first cooling circuit inlet temperature sensor. When the water temperature entering the engine is too low, the PTC in the engine cooling circuit starts to function. Two temperature limits N1 (i.e., the first temperature threshold) and N2 (i.e., the second temperature threshold) are set. When the engine inlet temperature is lower than N1, the two heating devices PTC1 and PTC2 start to heat, raising the water temperature of the small cycle. When the water temperature is higher than N1 and lower than N2, PTC1 is closed and PTC2 is opened. At this time, only one heating device is heating. When the water temperature is higher than N2, both PTC1 and PTC2 are closed, and the engine cooling water undergoes a large cycle operation.

[0061] Figure 3 is a flowchart of the control method for the cooling circuit of a fuel cell engine according to an embodiment of the present invention, as Figure 3 shown. After the engine starts, after the inlet temperature sensor obtains the fuel cell stack inlet temperature value, it determines whether the fuel cell stack inlet temperature value is less than N1. If so, it controls the two heating devices PTC1 and PTC2 to start heating; when the fuel cell stack inlet temperature value is greater than N1 and less than N2, PTC1 is closed and PTC2 is opened; when the fuel cell stack inlet temperature value is greater than N2, it controls both heating devices PTC1 and PTC2 to be closed.

[0062] Through the above control method, the coolant in the first cooling circuit can be temperature-adjusted according to the actual working conditions to meet the heat dissipation requirements of the fuel cell engine and improve the operating efficiency of the fuel cell engine.

[0063] In addition, on the cooling circuit of the fuel cell engine, the cooling control method for the fuel cell engine and its auxiliary equipment further includes one of the following: when it is determined that the actual required power of the fuel cell engine increases or decreases, adjusting the rotational speed of the water pump on the first cooling circuit so that the first inlet temperature value reaches the set temperature value, where the water pump is located between the flow regulating component and the fuel cell stack; adjusting the opening degree of the flow regulating component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

[0064] In this embodiment, when the first cooling circuit performs a large circulation operation, the inlet temperature of the fuel cell stack needs to be set to 60 °C. When the engine demand power increases or decreases, the inlet temperature of the fuel cell stack can be controlled to reach the set value by adjusting the rotational speed of the electric water pump and the opening degree of the three-way ball valve, so that the engine operates more efficiently.

[0065] Secondly, in the second cooling circuit, the temperature regulating component includes: a cooling fan and a refrigerator. Among them, the cooling fan is located on one side of the radiator in the second cooling circuit and is used to regulate the temperature of the radiator; the refrigerator is arranged on the second cooling circuit and is used to regulate the temperature of the coolant in the second cooling circuit; the auxiliary machine includes: an air compressor and an intercooler; among them, according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, the control method of the second temperature regulating component is determined, including: when it is determined that the second inlet temperature value is lower than the third temperature threshold, it is determined that the control method of the refrigerator is closed, and the control methods of the air compressor and the intercooler are to convey antifreeze to the air compressor and the intercooler; when it is determined that the second inlet temperature value is higher than the third temperature threshold, it is determined that the control method of the refrigerator is turned on, and the control methods of the air compressor and the intercooler are to stop the coolant from flowing to the air compressor and the intercooler.

[0066] In this embodiment, by comparing the second inlet temperature value with a preset third temperature threshold, a comparison result is obtained; and the operation mode of the refrigerator in the second cooling circuit is determined according to the comparison result. For example, when the second inlet temperature value is lower than the third temperature threshold, it indicates that the temperature of the coolant in the second cooling circuit is relatively low and no further temperature regulation is required. The refrigerator can be controlled to be turned off. At the same time, in order to prevent the intercooler and the air compressor from being frozen, antifreeze can be conveyed to the air compressor and the intercooler; when the second inlet temperature value is higher than the third temperature threshold, it indicates that the temperature of the coolant in the second cooling circuit is relatively high and temperature regulation is required. The refrigerator can be controlled to be turned on. At the same time, the flow of the coolant to the air compressor and the intercooler is suspended.

[0067] In addition, the auxiliary machine may further include: a voltage converter and a hydrogen circulation pump. Among them, the voltage converter is used to convert the power output by the fuel cell engine, and the hydrogen circulation pump is used to control the hydrogen circulation amount. The cooling control method of the fuel cell engine and the auxiliary machine further includes: after the fuel cell engine is started, determining the heat dissipation power required by the auxiliary machine; determining the flow rate of the coolant on the second cooling circuit according to the heat dissipation power; determining the opening degree of the control valve on the second cooling circuit according to the magnitude of the flow rate, where the control valve includes: a first control valve and a second control valve. The first control valve is used to control the flow rate of the coolant flowing through the voltage converter, and the second control valve is used to control the flow rate of the coolant flowing through the hydrogen circulation pump. The flow rate is positively correlated with the opening degree of the control valve.

[0068] During the operation of the fuel cell engine, the BOP auxiliary machines such as the air compressor, hydrogen circulation pump, and intercooler are required to control the air intake volume, hydrogen circulation volume, and the intake air temperature drops to meet the range of the fuel cell stack intake air temperature. The DC / DC converter is also needed to convert the power generated by the engine. These components all require the low-temperature cooling circuit to function. Since the water flow rates and temperatures required by each component are inconsistent, it is necessary to control the cooling pipelines and cooling flow rates of different components. Therefore, in the embodiments of the present invention, the cooling circuit of the auxiliary machine is designed as follows Figure 4 shown, Figure 4 is a schematic diagram of the cooling circuit of the auxiliary machine according to the embodiments of the present invention, as Figure 4 shown, including: a cooling fan, a second radiator, a particulate filter, a total radiator control valve, a three-way ball valve 1, a three-way ball valve 2, a hydrogen circulation pump controller, a hydrogen circulation pump, a DC / DC converter, a refrigeration device (i.e., a cooler), an air compressor controller, an intercooler, an air compressor, and a three-way ball valve 3.

[0069] It should be noted that the larger the flow rate of the antifreeze in the radiator, the more antifreeze is consumed. During the operation of a bus or a light truck, the overall vehicle power demand is not high, so the output power of the engine is not required to be high. When the engine output power is not high, the heat dissipation requirements for the fuel cell stack and each component are not high, and the flow rate of the antifreeze in the radiator is not large either. If the water flow rate of the radiator antifreeze is not controlled at this time, the temperature of the components will be too low, resulting in low working efficiency of the components and further leading to low engine efficiency. Therefore, a total radiator flow control valve is added at the outlet of the radiator. Figure 5 is a flowchart of the control method for the cooling circuit of the auxiliary machine according to the embodiments of the present invention, as Figure 5As shown, the heat dissipation power required for each component is calculated based on the magnitude of the engine's pulling current, and then the cooling water flow rate required for each component is obtained. At the same time, according to the different heat dissipation requirements, the rotational speed of the radiator fan is controlled by calculating the heat dissipation power required for all components, reducing the power consumption of the vehicle's auxiliary equipment. The antifreeze flow rate coming out of the total control valve of the radiator is the total flow rate required by all auxiliary equipment. First, through the action of the three-way ball valve 1 (i.e., the first control valve), the water flow rate for DC / DC heat dissipation is supplied. Then, through the three-way ball valve 2 (i.e., the second control valve), sufficient water flow rate is supplied to the hydrogen circulation pump. Since the inlet water temperature of the air compressor, controller, and intercooler is lower than the required water temperature of the DC / DC converter and hydrogen circulation pump, a temperature sensor is provided on the third branch to detect the water temperature of the third branch. At the same time, there is an electric three-way ball valve 3 on the third branch. When it is detected that the water temperature of the third branch is higher than the required water temperature of the air compressor and intercooler, the air-conditioning refrigeration function is turned on, and the AB direction of the three-way ball valve is opened. The water in the third branch no longer passes through components such as the air compressor and intercooler and directly circulates back to the radiator. When the water temperature sensor in the third branch detects that it is lower than the required water temperature, the air-conditioning refrigeration does not need to be turned on, and the AC of the three-way valve is opened. The antifreeze enters the air compressor, controller, and intercooler. When the water temperature of the third branch is higher than the required water temperature, the air-conditioning refrigerates, the AB of the three-way valve is opened, and the AC is closed. The water in the third branch flows back to the radiator, and at the same time, the three-way ball valve 1 and the three-way ball valve 2 control the valve opening until the water temperature of the third branch reaches the set range, and the AC of the three-way valve is opened. The antifreeze enters the air compressor, controller, and intercooler, and the air-conditioning remains in the refrigeration state until the water temperature sensor detects that the antifreeze temperature is lower than the required water temperature.

[0070] In the above embodiment, determining the heat dissipation power required for the auxiliary equipment includes: obtaining the first actual demand power of the target vehicle where the fuel cell engine is located; determining the second actual demand power of the fuel cell corresponding to the fuel cell engine according to the first actual demand power; determining the pulling current of the fuel cell according to the second actual demand power; and determining the heat dissipation power required for the auxiliary equipment according to the pulling current.

[0071] Here, the magnitude of the pulling current of the fuel cell engine corresponds to different waterway pressure, airway pressure, and hydrogen path pressure requirements, and these pressures correspond to the rotational speed requirements and motor power requirements of components such as water pumps, circulation pumps, and air compressors. The heat dissipation power requirements of each component are obtained from the off-line data of each component; the cooling requirements of each component correspond to the cold water flow rate of each component. Here, the off-line data can be the characteristic data of each component, such as rated voltage, rated power, etc.

[0072] Moreover, different load currents of the fuel cell correspond to different inlet water temperatures and temperature differences between the inlet and outlet of the fuel cell. Therefore, the heat dissipation power required by the auxiliary machine can be determined according to the load current. Among them, the load current is the actual required power of the fuel cell converted according to the required power of the whole vehicle. The actual required power of the fuel cell is obtained by multiplying the load current and the voltage. Furthermore, the load current can be obtained according to the voltage and the actual required power of the fuel cell.

[0073] According to the above embodiments of the present invention, the cooling control method of the fuel cell engine and the auxiliary machine may further include: determining the rotation speed of the cooling fan according to the magnitude of the heat dissipation power; controlling the cooling fan to operate at the rotation speed to adjust the temperature of the radiator.

[0074] As Figure 4 shown, a cooling fan is provided on one side of the radiator, and the radiator can be cooled by the cooling fan. For example, the rotation speed of the cooling fan can be determined according to the magnitude of the heat dissipation power, and then the cooling fan can be controlled to operate at the rotation speed to adjust the temperature of the radiator, improving the operating efficiency of the fuel cell engine.

[0075] In the above embodiment, determining the flow rate of the coolant in the second cooling circuit according to the heat dissipation power includes: determining the flow rate corresponding to the heat dissipation power according to the preset relationship between the heat dissipation power and the coolant flow rate, where the preset relationship is determined in advance according to the corresponding relationship between the coolant flow rates in the second cooling circuit corresponding to different heat dissipation powers of the auxiliary machine; determining the flow rate corresponding to the heat dissipation power as the flow rate of the coolant in the second cooling circuit.

[0076] In this embodiment, the preset relationship between the heat dissipation power and the coolant flow rate can be determined in advance according to the test data in the historical time period, that is, how much coolant flow rate corresponds to different heat dissipation powers; during actual use, the corresponding coolant flow rate can be searched in the preset relationship according to the heat dissipation power value, and further improve the operating efficiency of the fuel cell engine.

[0077] Since the fuel cell engine needs a suitable inlet water temperature to ensure efficient operation during operation, and at the same time, the engine auxiliary machine includes an air compressor, an air compressor controller, an intercooler, and a hydrogen circulation pump, all of which need additional cooling water circuits for cooling during operation to provide efficient operation for the engine. The coolant flow rate and temperature of the stack are different from those of the auxiliary machine. Without a reasonable control method, the water pipelines of the whole vehicle are very messy. When the engine is arranged on the whole vehicle, the layout of the cooling water pipelines is very cumbersome, causing great trouble to the vehicle manufacturer.

[0078] Therefore, in the embodiments of the present invention, only one radiator is used to provide two channels. One channel is used for the heat dissipation of the fuel cell engine, and the other channel is used for the cooling of the DCDC, air compressor and controller, hydrogen circulation pump and controller, and intercooler. At the same time, according to the different water flow requirements and water temperature requirements of each auxiliary machine, three-way ball valves are added to each branch of the auxiliary machine components to control the water flow and water temperature of each branch. Temperature sensors are added to this branch. If the temperature of the temperature sensor 1 is relatively high, the refrigeration device is turned on. After passing through the refrigeration device, the temperature 2 of the cooling path is detected. If the temperature of the cooling path 2 is lower than the required temperature of the air compressor, the electric three-way ball valve controls the water flow of the air compressor and controller, and the intercooler branch. When the temperature of the cooling path 2 is higher than the required temperature of the air compressor, the electric three-way ball valve closes the branch flowing into the air compressor and controller while the engine idles. When the temperature of the cooling path 2 is lower than the required temperature of the air compressor, it runs normally to ensure the efficient operation of the fuel cell engine.

[0079] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0080] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of this application, in essence, or the part that makes a contribution to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0081] According to an embodiment of the present invention, there is also provided a cooling control device for a fuel cell engine and auxiliary machines for implementing the above-mentioned cooling control method for the fuel cell engine and auxiliary machines. Figure 6 is a schematic diagram of a cooling control device for a fuel cell engine and auxiliary machines according to an embodiment of the present invention, as Figure 6 shown. The cooling control device for the fuel cell engine and auxiliary machines includes: an acquisition unit 61, a determination unit 63, and a cooling unit 65. The cooling control device for the fuel cell engine and auxiliary machines will be described below.

[0082] An acquisition unit 61, configured to, after the fuel cell engine is started, acquire the temperature value of the coolant when entering the stack of the fuel cell engine on the first cooling loop to obtain a first inlet temperature value, and acquire the temperature value of the coolant when entering the auxiliary machine of the fuel cell engine on the second cooling loop to obtain a second inlet temperature value, where the first cooling loop is used to cool the fuel cell engine, the second cooling loop is used to cool the auxiliary machine, and the auxiliary machine is used to adjust preset parameters that affect the first inlet temperature value, and the preset parameters at least include: air intake volume, hydrogen circulation volume.

[0083] A determination unit 63, configured to determine the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determine the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, where the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling loop, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling loop.

[0084] A cooling unit 65, configured to control the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling loop cools the fuel cell engine, and the coolant in the second cooling loop cools the auxiliary machine.

[0085] It should be noted here that the above acquisition unit 61, determination unit 63, and cooling unit 65 correspond to steps S102 to S106 in the above embodiment. The examples and application scenarios implemented by the three units and the corresponding steps are the same, but are not limited to the content disclosed in the above embodiment.

[0086] As can be seen from the above, in the solution described in the above embodiments of the present invention, after the fuel cell engine is started, the acquisition unit can acquire the temperature value of the coolant entering the stack of the fuel cell engine on the first cooling circuit to obtain the first inlet temperature value, and acquire the temperature value of the coolant entering the auxiliary machine of the fuel cell engine on the second cooling circuit to obtain the second inlet temperature value. Herein, the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machine, and the auxiliary machine is used to adjust the preset parameters that affect the first inlet temperature value. The preset parameters at least include: air intake volume and hydrogen circulation volume. Then, the determination unit determines the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determines the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold. Herein, the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling circuit. And the cooling unit controls the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine, achieving the purpose of determining the control mode of the temperature adjustment component on the cooling circuit according to the stack inlet temperature of the fuel cell engine and the temperature value of the coolant when entering the auxiliary machine, and adjusting the temperature adjustment component based on this control mode to enable the coolant to quickly control the stack of the fuel cell engine within a reasonable temperature range, thereby improving the operating efficiency of the fuel cell engine.

[0087] Therefore, through the technical solution provided by the embodiments of the present invention, the technical problem in the related art that the temperature of the coolant in the cooling circuits of the fuel cell engine and the auxiliary machine cannot be adjusted according to the actual working conditions, affecting the operating efficiency of the fuel cell engine, is solved.

[0088] In an alternative embodiment, the temperature regulating component includes: a first thermistor and a second thermistor. One end of the first thermistor is connected to one end of the temperature sensor, and the other end is connected to the flow regulating component; one end of the second thermistor is connected to the radiator of the fuel cell engine, and the other end is connected to the flow regulating component; the temperature sensor is used to obtain the first inlet temperature value, and the flow regulating component is used to regulate the flow rate of the coolant in the first cooling circuit; wherein, the determining unit includes: a first determining module, configured to determine that the control modes of the first thermistor and the second thermistor are to be started simultaneously when it is determined that the first inlet temperature value is less than the first temperature threshold; a second determining module, configured to determine that the control mode of the first thermistor is to be turned off and the control mode of the second thermistor is to be started when it is determined that the first inlet temperature value is greater than the first temperature threshold and less than the second temperature threshold; a third determining module, configured to determine that the control modes of the first thermistor and the second thermistor are to be turned off simultaneously when it is determined that the first inlet temperature value is greater than the second temperature threshold.

[0089] In an alternative embodiment, the cooling control device for the fuel cell engine and its auxiliaries further includes one of the following: a first regulating unit, configured to regulate the rotational speed of the water pump in the first cooling circuit to make the first inlet temperature value reach the set temperature value when it is determined that the actual required power of the fuel cell engine increases or decreases, wherein the water pump is located between the flow regulating component and the stack; a second regulating unit, configured to regulate the opening degree of the flow regulating component in the first cooling circuit to make the first inlet temperature value reach the set temperature value.

[0090] In an alternative embodiment, the temperature regulating component includes: a cooling fan and a refrigerator. The cooling fan is located on one side of the radiator in the second cooling circuit and is used to regulate the temperature of the radiator; the refrigerator is arranged on the second cooling circuit and is used to regulate the temperature of the coolant in the second cooling circuit; the auxiliaries include: an air compressor and an intercooler; wherein, the determining unit includes: a fourth determining module, configured to determine that the control mode of the refrigerator is to be turned off and the control modes of the air compressor and the intercooler are to supply antifreeze to the air compressor and the intercooler when it is determined that the second inlet temperature value is lower than the third temperature threshold; a fifth determining module, configured to determine that the control mode of the refrigerator is to be turned on and the control modes of the air compressor and the intercooler are to stop the coolant from flowing to the air compressor and the intercooler when it is determined that the second inlet temperature value is higher than the third temperature threshold.

[0091] In an alternative embodiment, the auxiliary machine includes: a voltage converter and a hydrogen circulation pump. The voltage converter is configured to convert the power output by the fuel cell engine, and the hydrogen circulation pump is configured to control the hydrogen circulation amount. The cooling control device of the fuel cell engine and the auxiliary machine further includes: a determination unit, further configured to determine the heat dissipation power required by the auxiliary machine after the fuel cell engine is started; a determination unit, further configured to determine the flow rate of the coolant on the second cooling circuit according to the heat dissipation power; a determination unit, further configured to determine the opening degree of the control valve on the second cooling circuit according to the magnitude of the flow rate. The control valve includes: a first control valve and a second control valve. The first control valve is configured to control the flow rate of the coolant flowing through the voltage converter, and the second control valve is configured to control the flow rate of the coolant flowing through the hydrogen circulation pump.

[0092] In an alternative embodiment, the determination unit includes: an acquisition module, configured to acquire the first actual demand power of the target vehicle where the fuel cell engine is located; a sixth determination module, configured to determine the second actual demand power of the fuel cell corresponding to the fuel cell engine according to the first actual demand power; a seventh determination module, configured to determine the load current of the fuel cell according to the second actual demand power; an eighth determination module, configured to determine the heat dissipation power required by the auxiliary machine according to the load current.

[0093] In an alternative embodiment, the cooling control device of the fuel cell engine and the auxiliary machine further includes: a determination unit, further configured to determine the rotation speed of the cooling fan according to the magnitude of the heat dissipation power; a control unit, configured to control the cooling fan to operate at the rotation speed to adjust the temperature of the radiator.

[0094] In an alternative embodiment, determining the flow rate of the coolant on the second cooling circuit according to the heat dissipation power includes: a ninth determination module, configured to determine the flow rate corresponding to the heat dissipation power according to the preset relationship between the heat dissipation power and the coolant flow rate, where the preset relationship is determined in advance according to the corresponding relationship between the coolant flow rates on the second cooling circuit corresponding to the auxiliary machine under different heat dissipation powers; a tenth determination module, configured to determine the flow rate corresponding to the heat dissipation power as the flow rate of the coolant on the second cooling circuit.

[0095] According to another aspect of the embodiments of the present invention, a vehicle is further provided. The vehicle uses the cooling control method of the fuel cell engine and the auxiliary machine in any one of the above.

[0096] According to another aspect of the embodiments of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium includes a stored program, where the program executes the cooling control method of the fuel cell engine and the auxiliary machine in any one of the above.

[0097] Optionally, in this embodiment, the above computer-readable storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network, or in any one of the communication devices in the communication device group.

[0098] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after the fuel cell engine is started, obtain the temperature value of the coolant entering the stack of the fuel cell engine on the first cooling circuit to obtain a first inlet temperature value, and obtain the temperature value of the coolant entering the auxiliary machine of the fuel cell engine on the second cooling circuit to obtain a second inlet temperature value, wherein the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machine, and the auxiliary machine is used to adjust preset parameters that affect the first inlet temperature value, and the preset parameters at least include: air intake volume, hydrogen circulation volume; determine the control mode of the first temperature regulating component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determine the control mode of the second temperature regulating component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, wherein the first temperature regulating component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature regulating component is used to adjust the temperature of the coolant in the second cooling circuit; control the first temperature regulating component and the second temperature regulating component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine.

[0099] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the first inlet temperature value is less than the first temperature threshold, determine that the control modes of the first thermistor and the second thermistor are to be started simultaneously; when it is determined that the first inlet temperature value is greater than the first temperature threshold and less than the second temperature threshold, determine that the control mode of the first thermistor is to be turned off and the control mode of the second thermistor is to be started; when it is determined that the first inlet temperature value is greater than the second temperature threshold, determine that the control modes of the first thermistor and the second thermistor are to be turned off simultaneously.

[0100] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the actual required power of the fuel cell engine increases or decreases, adjust the rotational speed of the water pump on the first cooling circuit so that the first inlet temperature value reaches the set temperature value, wherein the water pump is located between the flow regulating component and the stack; adjust the opening degree of the flow regulating component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

[0101] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the second inlet temperature value is lower than the third temperature threshold, determine that the control mode of the cooler is off, and the control modes of the air compressor and the intercooler are to deliver antifreeze to the air compressor and the intercooler; when it is determined that the second inlet temperature value is higher than the third temperature threshold, determine that the control mode of the cooler is on, and the control modes of the air compressor and the intercooler are to stop the coolant from flowing to the air compressor and the intercooler.

[0102] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after the fuel cell engine is started, determine the heat dissipation power required by the auxiliary machine; determine the flow rate of the coolant on the second cooling circuit according to the heat dissipation power; determine the opening degree of the control valve on the second cooling circuit according to the magnitude of the flow rate, where the control valve includes: a first control valve and a second control valve, the first control valve is used to control the flow rate of the coolant flowing through the voltage converter, and the second control valve is used to control the flow rate of the coolant flowing through the hydrogen circulation pump.

[0103] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtain the first actual demand power of the target vehicle where the fuel cell engine is located; determine the second actual demand power of the fuel cell corresponding to the fuel cell engine according to the first actual demand power; determine the loading current of the fuel cell according to the second actual demand power; determine the heat dissipation power required by the auxiliary machine according to the loading current.

[0104] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determine the rotation speed of the cooling fan according to the magnitude of the heat dissipation power; control the cooling fan to operate at the rotation speed to adjust the temperature of the radiator.

[0105] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determine the flow rate corresponding to the heat dissipation power according to the preset relationship between the heat dissipation power and the coolant flow rate, where the preset relationship is determined in advance according to the corresponding relationship between the coolant flow rates on the second cooling circuit corresponding to the auxiliary machine at different heat dissipation powers; determine the flow rate corresponding to the heat dissipation power as the flow rate of the coolant on the second cooling circuit.

[0106] According to another aspect of the embodiments of the present invention, a processor is further provided, and the processor is used to run a program, where when the program runs, it executes the cooling control method of the fuel cell engine and the auxiliary machine in any one of the above.

[0107] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0108] In the above embodiments of the present invention, the descriptions of the respective embodiments each have their own emphasis. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0109] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0110] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0111] In addition, the functional units in various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0112] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs, and other media that can store program codes.

[0113] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A cooling control method for a fuel cell engine and auxiliary machine, characterized in that, Including: After the fuel cell engine is started, obtain the temperature value of the coolant entering the stack of the fuel cell engine on the first cooling circuit to obtain the first inlet temperature value, and obtain the temperature value of the coolant entering the auxiliary machine of the fuel cell engine on the second cooling circuit to obtain the second inlet temperature value. Wherein, the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machine, and the auxiliary machine is used to adjust preset parameters that affect the first inlet temperature value. The preset parameters at least include: air intake volume, hydrogen circulation volume; Determine the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determine the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold. Wherein, the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling circuit; Control the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine; Wherein, the method further includes one of the following: when it is determined that the actual required power of the fuel cell engine increases or decreases, adjust the rotation speed of the water pump on the first cooling circuit so that the first inlet temperature value reaches the set temperature value, and the water pump is located between the flow adjustment component and the stack; adjust the opening degree of the flow adjustment component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

2. The cooling control method for a fuel cell engine and auxiliary machine according to claim 1, wherein The temperature adjustment component includes: a first thermistor and a second thermistor. Wherein, one end of the first thermistor is connected to one end of the temperature sensor, and the other end is connected to the flow adjustment component; one end of the second thermistor is connected to the radiator of the fuel cell engine, and the other end is connected to the flow adjustment component; the temperature sensor is used to obtain the first inlet temperature value, and the flow adjustment component is used to adjust the flow rate of the coolant on the first cooling circuit; Wherein, determining the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold includes: When it is determined that the first inlet temperature value is less than the first temperature threshold, determine that the control modes of the first thermistor and the second thermistor are to be started simultaneously; When it is determined that the first inlet temperature value is greater than the first temperature threshold and less than the second temperature threshold, determine that the control mode of the first thermistor is to be closed and the control mode of the second thermistor is to be started; When it is determined that the first inlet temperature value is greater than the second temperature threshold, determine that the control modes of the first thermistor and the second thermistor are to be closed simultaneously.

3. The cooling control method for a fuel cell engine and auxiliary machine according to claim 1, wherein, The temperature adjustment component includes: a cooling fan and a cooler. Among them, the cooling fan is located on one side of the radiator in the second cooling circuit and is used to adjust the temperature of the radiator; the cooler is arranged on the second cooling circuit and is used to adjust the temperature of the coolant in the second cooling circuit; the auxiliary machine includes: an air compressor and an intercooler; Among them, according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, the control method of the second temperature adjustment component is determined, including: When it is determined that the second inlet temperature value is lower than the third temperature threshold, it is determined that the control method of the cooler is to be turned off, and the control methods of the air compressor and the intercooler are to convey antifreeze to the air compressor and the intercooler; When it is determined that the second inlet temperature value is higher than the third temperature threshold, it is determined that the control method of the cooler is to be turned on, and the control methods of the air compressor and the intercooler are to stop the coolant from flowing to the air compressor and the intercooler.

4. The cooling control method of the fuel cell engine and auxiliary machine according to claim 3, characterized in that The auxiliary machine includes: a voltage converter and a hydrogen circulation pump. Among them, the voltage converter is used to convert the power output by the fuel cell engine, and the hydrogen circulation pump is used to control the hydrogen circulation amount. It also includes: After the fuel cell engine is started, determine the heat dissipation power required by the auxiliary machine; Determine the flow rate of the coolant on the second cooling circuit according to the heat dissipation power; Determine the opening degree of the control valve on the second cooling circuit according to the magnitude of the flow rate. Among them, the control valve includes: a first control valve and a second control valve. The first control valve is used to control the flow rate of the coolant flowing through the voltage converter, and the second control valve is used to control the flow rate of the coolant flowing through the hydrogen circulation pump. The flow rate is positively correlated with the opening degree of the control valve.

5. The cooling control method for a fuel cell engine and its auxiliary machine according to claim 4, characterized in that, Determining the heat dissipation power required by the auxiliary machine includes: Obtain the first actual demand power of the target vehicle where the fuel cell engine is located; Determine the second actual demand power of the fuel cell corresponding to the fuel cell engine according to the first actual demand power; Determine the load current of the fuel cell according to the second actual demand power; Determine the heat dissipation power required by the auxiliary machine according to the load current.

6. The cooling control method of the fuel cell engine and auxiliary machine according to claim 4, characterized in that It also includes: Determine the rotation speed of the cooling fan according to the magnitude of the heat dissipation power; Control the cooling fan to operate at the rotation speed to adjust the temperature of the radiator.

7. The cooling control method for a fuel cell engine and auxiliary machine according to claim 4, characterized in that Determining the flow rate of the coolant on the second cooling circuit according to the heat dissipation power includes: Determine the flow rate corresponding to the heat dissipation power according to the preset relationship between the heat dissipation power and the coolant flow rate. Among them, the preset relationship is determined in advance according to the corresponding relationship between the flow rates of the coolant on the second cooling circuit corresponding to the auxiliary machine under different heat dissipation powers; Determine the flow rate corresponding to the heat dissipation power as the flow rate of the coolant on the second cooling circuit.

8. A cooling control device for a fuel cell engine and auxiliary machine, characterized in that, It includes: An acquisition unit, configured to, after the fuel cell engine is started, acquire the temperature value of the coolant when entering the stack of the fuel cell engine on the first cooling circuit, to obtain a first inlet temperature value, and acquire the temperature value of the coolant when entering the auxiliary machine of the fuel cell engine on the second cooling circuit, to obtain a second inlet temperature value, where the first cooling circuit is used to cool the fuel cell engine, the second cooling circuit is used to cool the auxiliary machine, and the auxiliary machine is used to adjust preset parameters that affect the first inlet temperature value, and the preset parameters at least include: air intake volume, hydrogen circulation volume; A determination unit, configured to determine the control mode of the first temperature adjustment component according to the magnitude relationship between the first inlet temperature value and the corresponding temperature threshold, and determine the control mode of the second temperature adjustment component according to the magnitude relationship between the second inlet temperature value and the corresponding temperature threshold, where the first temperature adjustment component is used to adjust the temperature of the coolant in the first cooling circuit, and the second temperature adjustment component is used to adjust the temperature of the coolant in the second cooling circuit; A cooling unit, configured to control the first temperature adjustment component and the second temperature adjustment component according to the control mode, so that the coolant in the first cooling circuit cools the fuel cell engine, and the coolant in the second cooling circuit cools the auxiliary machine; Wherein, the device further includes one of the following: a first adjustment unit, configured to, when determining that the actual required power of the fuel cell engine increases or decreases, adjust the rotation speed of the water pump on the first cooling circuit so that the first inlet temperature value reaches a set temperature value, and the water pump is located between the flow adjustment component and the stack; a second adjustment unit, configured to adjust the opening degree of the flow adjustment component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

9. A vehicle, characterized in that, The vehicle uses the cooling control method for the fuel cell engine and the auxiliary machine according to any one of claims 1 to 7 above.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, where the program executes the cooling control method for the fuel cell engine and the auxiliary machine according to any one of claims 1 to 7.

11. A processor, characterized in that, The processor is used to run a program, where the program, when running, executes the cooling control method for the fuel cell engine and the auxiliary machine according to any one of claims 1 to 7.

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