CN116072938A

CN116072938A - Method and device for controlling cooling of fuel cell engine and auxiliary machine

Info

Publication number: CN116072938A
Application number: CN202310166294.4A
Authority: CN
Inventors: 张国庆; 孙言涛; 曹孟雪; 刘晓辉
Original assignee: Weichai Balade Hydrogen Technology Co ltd
Current assignee: Weichai Balade Hydrogen Technology Co ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-05-05

Abstract

The invention discloses a cooling control method and a cooling control device for a fuel cell engine and an auxiliary machine. The method comprises the following steps: acquiring a first inlet temperature value when the cooling liquid on the first cooling loop enters a pile of the fuel cell engine, and acquiring a second inlet temperature value when the cooling liquid on the second cooling loop enters an auxiliary machine of the fuel cell engine; determining control modes of the first temperature regulating component and the second temperature regulating component according to the magnitude relation between the first inlet temperature value and the second inlet temperature value and the corresponding temperature threshold value respectively; the first temperature adjusting part and the second temperature adjusting part are controlled according to a control mode, so that the cooling liquid in the first cooling circuit cools the fuel cell engine, and the cooling liquid in the second cooling circuit cools the auxiliary machine. The invention solves the technical problems that the temperature of the cooling loop cooling liquid of the fuel cell engine and the auxiliary machine in the related art cannot be adjusted according to the actual working condition, and the operation efficiency of the fuel cell engine is affected.

Description

Method and device for controlling cooling of fuel cell engine and auxiliary machine

Technical Field

The invention relates to the technical field of heat dissipation of fuel cell engines, in particular to a cooling control method and a cooling control device for fuel cell engines and auxiliary machines.

Background

The fuel cell engine has high water temperature requirement in the running process, the temperature of the inlet of the electric pile is maintained within the range of 60+/-2 ℃ to ensure the efficient running of the engine, and the engine auxiliary machine comprises an air compressor, an air compressor controller, an intercooler and a hydrogen circulating pump, and the auxiliary machine can be in a stable working state for a long time due to the additional cooling in the running process. On the one hand, the engine directly drives the whole vehicle to run, on the other hand, when the engine power exceeds the power required by the running of the whole vehicle, the redundant power is supplied to the power battery, the engine needs DC/DC to perform voltage conversion when supplying power to the power battery, the DC/DC also needs to be cooled at low temperature in the running process, and normally the DC/DC is provided for a whole vehicle factory as a part of the fuel cell engine, so that the design of a cooling loop is very important in the whole design process of the engine, and meanwhile, the whole vehicle is not arranged if too many radiators are required because the whole vehicle is very limited in space.

In view of the above drawbacks, the related art has devised a cooling circuit for a fuel cell engine, specifically including two types of cooling circuits. The first cooling circuit includes: water tank, water pump, intercooler, the second cooling circuit includes: the cooling system is used for passenger vehicles, but is not suitable for commercial vehicles because the water flow of the cooling system of the commercial vehicles is large, and simultaneously, in order to enable the engine to reach the temperature with the highest efficiency as soon as possible, a three-way ball valve is additionally arranged outside an engine radiator, and meanwhile, the heat dissipation requirements on the air compressor, the controller, an intercooler and the like are higher. Moreover, the first cooling circuit comprises a water pump and an intercooler, when the water temperature rises very slowly during the operation of the first cooling circuit, the optimal water temperature value cannot be reached quickly, and the second cooling circuit only provides cooled parts, so that the water temperature control of the cooled parts is not described.

Aiming at the problems that the temperature of the cooling loop cooling liquid of the fuel cell engine and the auxiliary machine in the related art cannot be adjusted according to the actual working condition and the operation efficiency of the fuel cell engine is affected, no effective solution is proposed at present.

Disclosure of Invention

The embodiment of the invention provides a cooling control method and a cooling control device for a fuel cell engine and an auxiliary machine, which are used for at least solving the technical problem that the temperature of cooling liquid of a cooling loop of the fuel cell engine and the auxiliary machine in the related art cannot be adjusted according to actual working conditions, and the operation efficiency of the fuel cell engine is affected.

According to an aspect of an embodiment of the present invention, there is provided a cooling control method of a fuel cell engine and an auxiliary machine, including: after the fuel cell engine is started, acquiring a temperature value when cooling liquid on a first cooling loop enters a pile of the fuel cell engine to obtain a first inlet temperature value, and acquiring a temperature value when cooling liquid on a second cooling loop enters an auxiliary machine of the fuel cell engine to obtain a second inlet temperature value, wherein the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount; determining a control mode of a first temperature adjusting component according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determining a control mode of a second temperature adjusting component according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, wherein the first temperature adjusting component is used for adjusting the temperature of the cooling liquid in the first cooling loop, and the second temperature adjusting component is used for adjusting the temperature of the cooling liquid in the second cooling loop; and controlling the first temperature regulating component and the second temperature regulating component according to the control mode so that the cooling liquid in the first cooling circuit cools the fuel cell engine, and the cooling liquid in the second cooling circuit cools the auxiliary machine.

Optionally, the temperature adjusting part includes: the system comprises a first thermistor and a second thermistor, wherein one end of the first thermistor is connected with one end of a temperature sensor, and the other end of the first thermistor is connected with a flow regulating component; one end of the second thermistor is connected with a radiator of the fuel cell engine, and the other end of the second thermistor is connected with the flow regulating component; the temperature sensor is used for acquiring the first inlet temperature value, and the flow regulating component is used for regulating the flow of the cooling liquid on the first cooling circuit; wherein, according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, determining the control mode of the first temperature adjusting component comprises: when the first inlet temperature value is smaller than a first temperature threshold value, the control mode of the first thermistor and the control mode of the second thermistor are determined to be started simultaneously; when the first inlet temperature value is determined to be larger than the first temperature threshold value and smaller than a second temperature threshold value, the control mode of the first thermistor is determined to be closed, and the control mode of the second thermistor is determined to be started; and when the first inlet temperature value is determined to be larger than the second temperature threshold value, determining that the control modes of the first thermistor and the second thermistor are closed simultaneously.

Optionally, the cooling control method of the fuel cell engine and the auxiliary machine further includes one of: when it is determined that the actual required power of the fuel cell engine increases or decreases, adjusting the rotational speed of a water pump on the first cooling circuit so that the first inlet temperature value reaches a set temperature value, wherein the water pump is located between the flow rate adjusting part and the electric pile; and adjusting the opening degree of the flow adjusting component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

Optionally, the temperature adjusting part includes: the cooling device comprises a cooling fan and a refrigerator, wherein the cooling fan is positioned at one side of a radiator in the second cooling loop and is used for adjusting the temperature of the radiator; the refrigerator is arranged on the second cooling loop and is used for adjusting the temperature of the cooling liquid in the second cooling loop; the auxiliary machine includes: an air compressor and an intercooler; wherein, according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, determining the control mode of the second temperature adjusting component comprises: when the second inlet temperature value is determined to be lower than a third temperature threshold value, determining that the control mode of the refrigerator is closed, and the control modes of the air compressor and the intercooler are used for conveying antifreeze fluid to the air compressor and the intercooler; and when the second inlet temperature value is higher than the third temperature threshold value, determining that the control mode of the refrigerator is on, and stopping the flow of the cooling liquid to the air compressor and the intercooler.

Optionally, the auxiliary machine includes: the fuel cell engine comprises a voltage converter and a hydrogen circulating pump, wherein the voltage converter is used for converting the power output by the fuel cell engine, the hydrogen circulating pump is used for controlling the hydrogen circulating amount, and the cooling control method of the fuel cell engine and auxiliary machines further comprises the following steps: after the fuel cell engine is started, determining the heat dissipation power required by the auxiliary machine; determining the flow rate of the cooling liquid on the second cooling loop according to the heat dissipation power; determining the opening degree of a control valve on the second cooling loop according to the flow, wherein the control valve comprises: the first control valve is used for controlling the flow rate of the cooling liquid flowing through the voltage converter, and the second control valve is used for controlling the flow rate of the cooling liquid flowing through the hydrogen circulating pump, and the flow rate is positively correlated with the opening degree of the control valve.

Optionally, determining the heat dissipation power required by the auxiliary machine includes: acquiring a first actual required power of a target vehicle where the fuel cell engine is located; determining a second actual required power of the fuel cell corresponding to the fuel cell of 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; and determining the heat dissipation power required by the auxiliary machine according to the load current.

Optionally, the cooling control method of the fuel cell engine and the auxiliary machine further includes: determining the rotating speed of the cooling fan according to the magnitude of the cooling power; and controlling the cooling fan to run according to the rotating speed so as to regulate the temperature of the radiator.

Optionally, determining the flow rate of the cooling liquid on the second cooling circuit according to the heat dissipation power includes: determining the flow corresponding to the heat radiation power according to a preset relation between the heat radiation power and the flow of the cooling liquid, wherein the preset relation is determined in advance according to the corresponding relation between the flow of the cooling liquid on the second cooling circuit corresponding to the auxiliary machine under different heat radiation powers; and determining the flow corresponding to the heat dissipation power as the flow of the cooling liquid on the second cooling loop.

According to another aspect of the embodiment of the present invention, there is also provided a cooling control device for a fuel cell engine and an auxiliary machine, including: the device comprises an acquisition unit, a first cooling loop and a second cooling loop, wherein the acquisition unit is used for acquiring a temperature value of a cooling liquid on the first cooling loop when the cooling liquid enters a galvanic pile of the fuel cell engine after the fuel cell engine is started to obtain a first inlet temperature value, acquiring a temperature value of a cooling liquid on the second cooling loop when the cooling liquid enters an auxiliary machine of the fuel cell engine to obtain a second inlet temperature value, the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount; a determining unit, configured to determine a control manner of a first temperature adjustment component according to a magnitude relation between the first inlet temperature value and a corresponding temperature threshold value, and determine a control manner of a second temperature adjustment component according to a magnitude relation between the second inlet temperature value and a corresponding temperature threshold value, where the first temperature adjustment component is configured to adjust a temperature of the cooling liquid in the first cooling circuit, and the second temperature adjustment component is configured to adjust a temperature of the cooling liquid in the second cooling circuit; and a cooling unit configured to control the first temperature adjusting member and the second temperature adjusting member in the control manner such 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.

Optionally, the temperature adjusting part includes: the system comprises a first thermistor and a second thermistor, wherein one end of the first thermistor is connected with one end of a temperature sensor, and the other end of the first thermistor is connected with a flow regulating component; one end of the second thermistor is connected with a radiator of the fuel cell engine, and the other end of the second thermistor is connected with the flow regulating component; the temperature sensor is used for acquiring the first inlet temperature value, and the flow regulating component is used for regulating the flow of the cooling liquid on the first cooling circuit; wherein the determining unit includes: the first determining module is used for determining that the control modes of the first thermistor and the second thermistor are started simultaneously when the first inlet temperature value is smaller than a first temperature threshold value; the second determining module is used for determining that the control mode of the first thermistor is closed and the control mode of the second thermistor is started when the first inlet temperature value is determined to be larger than the first temperature threshold value and smaller than the second temperature threshold value; and the third determining module is used for determining that the control modes of the first thermistor and the second thermistor are closed simultaneously when the first inlet temperature value is determined to be larger than the second temperature threshold value.

Optionally, the cooling control device for the fuel cell engine and the auxiliary machine further includes one of: a first adjusting unit configured to adjust a rotation speed of a water pump on the first cooling circuit so that the first inlet temperature value reaches a set temperature value when it is determined that an actual required power of the fuel cell engine increases or decreases, wherein the water pump is located between the flow adjusting part and the electric pile; and the second adjusting unit is used for adjusting the opening degree of the flow adjusting component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

Optionally, the temperature adjusting part includes: the cooling device comprises a cooling fan and a refrigerator, wherein the cooling fan is positioned at one side of a radiator in the second cooling loop and is used for adjusting the temperature of the radiator; the refrigerator is arranged on the second cooling loop and is used for adjusting the temperature of the cooling liquid in the second cooling loop; the auxiliary machine includes: 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 off when it is determined that the second inlet temperature value is lower than a third temperature threshold value, and the control modes of the air compressor and the intercooler are to convey antifreeze fluid to the air compressor and the intercooler; and a fifth determining module, configured to determine that the control mode of the refrigerator is on and the control modes of the air compressor and the intercooler are to stop the flow of the cooling liquid to the air compressor and the intercooler when it is determined that the second inlet temperature value is higher than the third temperature threshold value.

Optionally, the auxiliary machine includes: the device comprises a voltage converter and a hydrogen circulating pump, wherein the voltage converter is used for converting the power output by the fuel cell engine, the hydrogen circulating pump is used for controlling the hydrogen circulating amount, and the cooling control device of the fuel cell engine and auxiliary machines further comprises: the determining unit is further used for determining the heat dissipation power required by the auxiliary machine after the fuel cell engine is started; the determining unit is further used for determining the flow of the cooling liquid on the second cooling loop according to the heat dissipation power; the determining unit is further configured to determine an opening degree of a control valve on the second cooling circuit according to the magnitude of the flow, where the control valve includes: the first control valve is used for controlling the flow rate of the cooling liquid flowing through the voltage converter, and the second control valve is used for controlling the flow rate of the cooling liquid flowing through the hydrogen circulating pump, and the flow rate is positively correlated with the opening degree of the control valve.

Optionally, the determining unit includes: the acquisition module is used for acquiring the first actual required power of the target vehicle where the fuel cell engine is located; a sixth determining module, configured to determine a second actual required power of the fuel cell engine corresponding to the fuel cell according to the first actual required power; a seventh determining module, configured to determine a load current of the fuel cell according to the second actual required power; and an eighth determining module, configured to determine heat dissipation power required by the auxiliary machine according to the load current.

Optionally, the cooling control device for the fuel cell engine and the auxiliary machine further includes: the determining unit is further used for determining the rotating speed of the cooling fan according to the magnitude of the cooling power; and the control unit is used for controlling the cooling fan to run according to the rotating speed so as to regulate the temperature of the radiator.

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

According to another aspect of the embodiment of the present invention, there is also provided a vehicle using the cooling control method of the fuel cell engine and the auxiliary machine of any one of the above.

According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes the cooling control method of the fuel cell engine and the auxiliary machine of any one of the above.

According to another aspect of the embodiment of the present invention, there is provided a processor for running a program, wherein the program runs to execute the cooling control method of the fuel cell engine and the auxiliary machine described in any one of the above.

In the embodiment of the invention, after the fuel cell engine is started, a temperature value of the first cooling loop when the cooling liquid enters the electric pile of the fuel cell engine is obtained, a first inlet temperature value is obtained, a temperature value of the second cooling loop when the cooling liquid enters the auxiliary machine of the fuel cell engine is obtained, and a second inlet temperature value is obtained, wherein the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount; determining a control mode of a first temperature adjusting component according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determining a control mode of a second temperature adjusting component according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, wherein the first temperature adjusting component is used for adjusting the temperature of cooling liquid in a first cooling loop, and the second temperature adjusting component is used for adjusting the temperature of cooling liquid in a second cooling loop; the first temperature adjusting part and the second temperature adjusting part are controlled in a control manner so that the cooling liquid in the first cooling circuit cools the fuel cell engine and the cooling liquid in the second cooling circuit cools the auxiliary machinery. According to the cooling control method of the fuel cell engine and the auxiliary machine, the control mode of the temperature adjusting component on the cooling loop is determined according to the temperature of the stack inlet of the fuel cell engine and the temperature value when the cooling liquid enters the auxiliary machine, so that the cooling liquid can be used for controlling the stack of the fuel cell engine within a reasonable temperature range more quickly based on the control mode, the operation efficiency of the fuel cell engine is improved, and the technical problem that the temperature of the cooling liquid of the cooling loop of the fuel cell engine and the auxiliary machine in the related art cannot be adjusted according to actual working conditions, and the operation efficiency of the fuel cell engine is affected is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a flowchart of a cooling control method of a fuel cell engine and an auxiliary machine according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a cooling circuit of a fuel cell engine according to an embodiment of the invention;

FIG. 3 is a flow chart of a method of controlling a cooling circuit of a fuel cell engine according to an embodiment of the invention;

fig. 4 is a schematic diagram of a cooling circuit of an auxiliary machine according to an embodiment of the invention;

fig. 5 is a flowchart of a control method of an auxiliary cooling circuit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a cooling control device of a fuel cell engine and an auxiliary machine according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For convenience of description, the following will describe some terms or terms related to the embodiments of the present application:

cooling circuit: means for dissipating heat into the air to prevent overheating of the engine.

DC/DC converter: and a device for converting the DC power supply with a certain voltage level into the DC power supply with other voltage levels.

Control valve: means for changing the state by receiving a control signal outputted from the mediation control unit.

Particulate filter: a filter for filtering impurities with a diameter of more than 100 mu m.

Hydrogen circulation pump: a device for hydrogen circulation.

As described in the background art, the temperature of the cooling fluid of the cooling circuit of the fuel cell engine and the auxiliary machine in the related art cannot be adjusted according to the actual working condition, so as to affect the operation efficiency of the fuel cell engine.

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 of which is a cooling circuit of an engine (fuel cell engine) stack, that is, a first cooling circuit; the other cooling circuit is the cooling circuit of the auxiliary machine, namely the second cooling circuit.

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.

According to an embodiment of the present invention, there is provided a method embodiment of a cooling control method of a fuel cell engine and an auxiliary machine, it is to be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown or described herein.

Fig. 1 is a flowchart of a cooling control method of a fuel cell engine and an auxiliary machine according to an embodiment of the present invention, as shown in fig. 1, the cooling control method of the fuel cell engine and the auxiliary machine including the steps of:

step S102, after the fuel cell engine is started, obtaining a temperature value when the cooling liquid on the first cooling loop enters a pile of the fuel cell engine, obtaining a first inlet temperature value, obtaining a temperature value when the cooling liquid on the second cooling loop enters an auxiliary machine of the fuel cell engine, and obtaining a second inlet temperature value, wherein the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount.

In this embodiment, which is described with the cooling liquid level being water, the first cooling circuit may be used for cooling the fuel cell engine, in particular, the stack of the fuel cell engine. In the cooling loop, under normal conditions, the radiator enters the pile through the particle filter, the waterway enters the engine radiator through the action of the electric water pump after coming out of the pile, and the branched air pipe enters the expansion water tank through the ion filter in the exhaust process of the engine so as to facilitate the exhaust of the engine, and meanwhile, the expansion water tank supplements water for the engine.

In the working process of the fuel cell engine, the functions of an air compressor, a hydrogen circulating pump, an intercooler and other BOP auxiliary machines are required to control the air inflow, the hydrogen circulating amount and the air inflow temperature to be reduced to meet the air inflow temperature range of the electric pile. Therefore, a second cooling circuit is required to cool the auxiliary machine, so that the auxiliary machine can efficiently control the air intake amount, the hydrogen circulation amount and the intake air temperature to be reduced to meet the range of the intake air temperature of the electric pile.

In this step, temperature sensors may be provided in the first and second cooling circuits to detect the stack inlet temperature and the temperature value of the second cooling circuit at which the coolant enters the auxiliary machine, so that the coolant temperature can be adjusted later to enable the coolant to cool the fuel cell engine and the auxiliary machine at an optimal temperature.

Step S104, determining a control mode of a first temperature adjusting component according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determining a control mode of a second temperature adjusting component according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, wherein the first temperature adjusting component is used for adjusting the temperature of the cooling liquid in the first cooling circuit, and the second temperature adjusting component is used for adjusting the temperature of the cooling liquid in the second cooling circuit.

In this embodiment, by setting the temperature threshold value, the first inlet temperature value and the second inlet temperature value are compared with the corresponding temperature threshold values, respectively, and the control manner of the first temperature adjustment component in the first cooling circuit and the control manner of the second temperature adjustment component in the second cooling circuit are determined based on the comparison result, so that the coolant is kept within a reasonable temperature range, and the fuel cell engine and the auxiliary machine are better cooled.

Wherein the temperature threshold value herein may be determined from test data; of course, it may be determined by other means, and is not particularly limited herein.

And step S106, controlling the first temperature regulating component and the second temperature regulating component in a control mode so that the cooling liquid in the first cooling circuit cools the fuel cell engine, and the cooling liquid in the second cooling circuit cools the auxiliary machine.

In this embodiment, the first cooling circuit and the second cooling circuit are respectively provided with a temperature adjusting component, that is, the first temperature adjusting component and the second temperature adjusting component, so that the temperature of the cooling liquid in the first cooling circuit and the second cooling circuit can be adjusted in a targeted manner, the auxiliary machine can better control the air intake amount, the hydrogen circulation amount and the intake air temperature to be reduced to meet the air intake temperature range of the electric pile, the electric pile of the fuel cell engine can be controlled within a reasonable temperature range relatively quickly, and the fuel cell engine can further operate efficiently.

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 cooling liquid on the first cooling circuit enters the electric pile of the fuel cell engine, and obtain the second inlet temperature value when the cooling liquid on the second cooling circuit enters the auxiliary machine of the fuel cell engine; determining control modes of the first temperature regulating component and the second temperature regulating component according to the magnitude relation between the first inlet temperature value and the second inlet temperature value and the corresponding temperature threshold value respectively; the first temperature adjusting component and the second temperature adjusting component are controlled according to a control mode, so that the cooling liquid in the first cooling loop cools the fuel cell engine, the cooling liquid in the second cooling loop cools the auxiliary machine, the control mode of the temperature adjusting component on the cooling loop is determined according to the temperature of the electric pile inlet of the fuel cell engine and the temperature value when the cooling liquid enters the auxiliary machine, the temperature adjusting component is adjusted according to the control mode, the purpose that the cooling liquid can control the electric pile of the fuel cell engine within a reasonable temperature range relatively quickly is achieved, and the operation efficiency of the fuel cell engine is improved.

Therefore, through the technical scheme provided by the embodiment of the invention, the technical problem that the temperature of the cooling loop cooling liquid of the fuel cell engine and the auxiliary machine in the related art cannot be adjusted according to the actual working condition, and the operation efficiency of the fuel cell engine is affected is solved.

In order to make the technical solution of the present invention more clearly known to those skilled in the art, the implementation process of the cooling control method for a fuel cell engine and an auxiliary machine of the present invention will be described in detail with reference to specific embodiments.

First, in the first cooling circuit, the temperature adjusting part may include: the first thermistor and the second thermistor, wherein one end of the first thermistor is connected with one end of the temperature sensor, and the other end of the first thermistor is connected with the flow regulating component; one end of the second thermistor is connected with a radiator of the fuel cell engine, and the other end of the second thermistor is connected with the flow regulating component; the temperature sensor is used for acquiring a first inlet temperature value, and the flow regulating component is used for regulating the flow of the cooling liquid on the first cooling loop; wherein, according to the magnitude relation between the first entry temperature value and the corresponding temperature threshold value, confirm the control mode of first temperature regulation part, include: when the first inlet temperature value is smaller than the first temperature threshold value, the control mode of the first thermistor and the control mode of the second thermistor are determined to be started simultaneously; when the first inlet temperature value is determined to be larger than the first temperature threshold value and smaller than the second temperature threshold value, the control mode of the first thermistor is determined to be closed, and the control mode of the second thermistor is determined to be started; and when the first inlet temperature value is determined to be larger than the second temperature threshold value, determining that the control modes of the first thermistor and the second thermistor are closed simultaneously.

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

In this embodiment, under normal conditions, the radiator enters the interior of the electric pile through the particle filter, the water path enters the radiator of the engine through the action of the electric water pump after coming out of the electric pile, the branch air pipe enters the expansion tank through the ion filter in the exhaust process of the engine so as to facilitate the exhaust of the engine, and meanwhile, the engine is supplemented with water from the expansion tank, the first cooling loop of the engine is controlled by the electric three-way ball valve, when the water temperature is lower than N2 (namely, the second temperature threshold), the engine cooling water path circulates little, water is discharged from the radiator and returns to the radiator through the electric three-way ball valve, when the water temperature is higher than N3 (the preset temperature threshold), the radiator water flows through the electric pile, returns to the radiator through the three-way ball valve under the action of the electric water pump, in the small circulation process, the inlet water temperature of the engine is detected by the first cooling loop inlet temperature sensor, when the water temperature of the engine is excessively low, the PTC in the engine cooling loop starts to act, two temperature limit values N1 (namely, the first temperature threshold) and N2 (namely, the second temperature threshold) are set, when the inlet temperature of the engine is lower than N1, the water temperature is lower than N2, the PTC1 and the PTC device is heated, when the water temperature is higher than N2 and the PTC device is heated, and when the PTC device is heated by two temperature is higher than N2, and the PTC device is turned off, and when the temperature is higher than N2 and is turned off.

FIG. 3 is a flowchart of a control method of a cooling circuit of a fuel cell engine according to an embodiment of the present invention, as shown in FIG. 3, after an inlet temperature sensor obtains a stack inlet temperature value after the engine is started, determining whether the stack inlet temperature value is less than N1, if yes, controlling two heating devices, namely PTC1 and PTC2, to start heating; when the temperature value of the inlet of the electric pile is larger than N1 and smaller than N2, the PTC1 is closed, and the PTC2 is opened; when the temperature value of the inlet of the electric pile is larger than N2, the PTC1 and the PTC2 are controlled to be closed.

Through the control mode, the cooling liquid in the first cooling loop can be subjected to temperature adjustment according to the actual working condition, so that the cooling requirement of the fuel cell engine is met, and the operating efficiency of the fuel cell engine is improved.

In addition, the cooling control method of the fuel cell engine and the auxiliary machine further includes one of the following steps: when it is determined that the actual required power of the fuel cell engine increases or decreases, adjusting the rotational speed of a water pump on the first cooling circuit so that the first inlet temperature value reaches a set temperature value, wherein the water pump is located between the flow adjustment component and the stack; the opening degree of the flow regulating part on the first cooling circuit is regulated so that the first inlet temperature value reaches the set temperature value.

In this embodiment, when the first cooling circuit performs the large cycle operation, the temperature of the inlet of the electric pile needs to be set to 60 ℃, and when the required power of the engine increases or decreases, the temperature of the inlet of the electric pile can be controlled to reach a set value by adjusting the rotation speed of the electric water pump and the opening of the three-way ball valve, so that the engine can operate more efficiently.

Next, in the second cooling circuit, the temperature adjusting part includes: the cooling device comprises a cooling fan and a refrigerator, wherein the cooling fan is positioned at one side of a radiator in a second cooling loop and used for adjusting the temperature of the radiator; the refrigerator is arranged on the second cooling loop and used for adjusting the temperature of the cooling liquid in the second cooling loop; the auxiliary machine includes: an air compressor and an intercooler; wherein, according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, determining the control mode of the second temperature adjusting component comprises: when the second inlet temperature value is determined to be lower than the third temperature threshold value, determining that the control mode of the refrigerator is closed, and the control modes of the air compressor and the intercooler are that antifreeze fluid is conveyed to the air compressor and the intercooler; and when the second inlet temperature value is higher than the third temperature threshold value, the control mode of the refrigerator is determined to be on, and the control modes of the air compressor and the intercooler are determined to stop the flow of the cooling liquid to the air compressor and the intercooler.

In this embodiment, the comparison result is obtained by comparing the second inlet temperature value with a third temperature threshold value set in advance; and determining the operation mode of the refrigerator in the second cooling loop according to the comparison result. For example, when the second inlet temperature value is lower than the third temperature threshold value, the temperature of the cooling liquid in the second cooling loop is lower, temperature adjustment is not needed, the refrigerator can be controlled to be closed, and meanwhile, in order to prevent the intercooler and the air compressor from being frozen out, the antifreezing liquid can be conveyed to the air compressor and the intercooler; when the second inlet temperature value is higher than the third temperature threshold value, the fact that the temperature of the cooling liquid in the second cooling loop is higher requires temperature adjustment can control the opening of the refrigerator, and meanwhile, the cooling liquid is stopped from flowing to the air compressor and the intercooler.

In addition, the auxiliary machine may further include: the method for controlling the cooling of the fuel cell engine and the auxiliary machine comprises the steps of a voltage converter and a hydrogen circulating pump, wherein the voltage converter is used for converting the power output by the fuel cell engine, the hydrogen circulating pump is used for controlling the hydrogen circulating amount, and the method for controlling the cooling of the fuel cell engine and the auxiliary machine further comprises the following steps: after the fuel cell engine is started, determining the heat dissipation power required by the auxiliary machine; determining the flow of the cooling liquid on the second cooling loop according to the heat dissipation power; determining the opening degree of a control valve on the second cooling loop according to the flow, wherein the control valve comprises: the first control valve is used for controlling the flow rate of the cooling liquid flowing through the voltage converter, and the second control valve is used for controlling the flow rate of the cooling liquid flowing through the hydrogen circulating pump, and the flow rate is positively correlated with the opening degree of the control valve.

Because the fuel cell engine needs the action of BOP auxiliary machines such as an air compressor, a hydrogen circulating pump, an intercooler and the like to control the air inflow, the hydrogen circulating amount and the air inflow temperature to be reduced to meet the range of the air inflow temperature of a pile in the working process, and also needs a DC/DC converter to convert the power emitted by the engine, the parts all need a low-temperature cooling loop to act, and because the water flow and the temperature required by each part are inconsistent, the cooling pipeline and the cooling flow of different parts need to be controlled. Therefore, in the embodiment of the present invention, the cooling circuit of the auxiliary machine is designed as shown in fig. 4, and fig. 4 is a schematic diagram of the cooling circuit of the auxiliary machine according to the embodiment of the present invention, as shown in fig. 4, including: radiator fan, second radiator, particulate filter, radiator total control valve, tee bend ball valve 1, tee bend ball valve 2, hydrogen circulating pump controller, hydrogen circulating pump, DC/DC converter, refrigerating plant (i.e. the refrigerator), air compressor machine controller, intercooler, air compressor machine and tee bend ball valve 3.

The larger the flow rate of the antifreeze in the radiator, the more the antifreeze is consumed. In the running process of a bus or a light truck, the required power of the whole vehicle is low, so that the output power of an engine is required to be low, when the output power of the engine is low, the heat dissipation requirements on a galvanic pile and each part are low, the flow of antifreeze in a radiator is also low, if the flow of antifreeze in the radiator is not controlled at this time, the working efficiency of the parts is low due to the fact that the temperature of the parts is too low, and the efficiency of the engine is low, and a total radiator flow control valve is added at an outlet of the radiator. FIG. 5 is a flow chart of a control method of an auxiliary cooling circuit according to an embodiment of the invention, as shown in FIG. 5, heat dissipation power required by each part is calculated according to the magnitude of engine load current, heat dissipation water flow required by each part is further obtained, meanwhile, the heat dissipation power required by all parts is calculated according to different heat dissipation requirements to control the rotation speed of a radiator fan, the power consumption of the whole auxiliary is reduced, the antifreeze flow from a radiator total control valve is the total flow required by all auxiliary, firstly, the water flow meeting DC/DC heat dissipation is acted by a three-way ball valve 1 (i.e. a first control valve), then the water flow is given to a hydrogen circulating pump by a three-way ball valve 2 (i.e. a second control valve), because the water temperature at the inlet of an air compressor and a controller and an intercooler is lower than the water temperatures required by a DC/DC converter and the hydrogen circulating pump, therefore, a temperature sensor detects the water temperature of a third branch, an electric three-way ball valve 3 is arranged on the third branch, when the water temperature of the third branch is detected to be higher than the required water temperature of the air compressor and the intercooler, the air conditioner refrigerating function is opened, the AB of the three-way ball valve is opened, the water of the third branch is not directly circulated back to the radiator through the parts such as the air compressor, the intercooler and the like, when the water temperature sensor of the third branch detects that the water temperature is lower than the required water temperature, the air conditioner refrigerating is not opened, the three-way valve AC is opened, the antifreezing solution enters the air compressor, the controller and the intercooler, when the water temperature of the third branch is higher than the required water temperature, the air conditioner refrigerating is opened, the AC is closed, the three-way ball valve 1 and the three-way ball valve 2 control the opening of the ball valve simultaneously until the water temperature of the third branch reaches the set range, the three-way valve AC is opened, the antifreeze fluid enters the air compressor, the controller and the intercooler, and the air conditioner is always in a refrigerating state until the water temperature sensor detects that the temperature of the antifreeze fluid is lower than the required water temperature.

In the above embodiment, determining the heat dissipation power required by the auxiliary machine includes: acquiring a first actual required power of a target vehicle where a fuel cell engine is located; determining a second actual required power of the fuel cell engine corresponding to the fuel cell according to the first actual required power; determining the load current of the fuel cell according to the second actual required power; and determining the heat dissipation power required by the auxiliary machine according to the load-pulling current.

The magnitude of the pulling load current of the fuel cell engine corresponds to different water path pressure, air path pressure and hydrogen path pressure requirements, and the pressures correspond to the rotating speed requirements of parts such as a water pump, a circulating pump, an air compressor and the like and the motor power requirements. The heat dissipation power requirement of each part is obtained due to the offline data of each part; the heat dissipation requirement of each part corresponds to the cold water flow of each part. The off-line data may be characteristic data of each component, such as rated voltage, rated power, and the like.

And different load-pulling currents of the fuel cell correspond to different water inlet temperatures and inlet-outlet temperature differences of the fuel cell, so that the heat dissipation power required by the auxiliary machine can be determined according to the load-pulling currents. The pulling load current is obtained by converting the required power of the whole vehicle into the actual required power of the fuel cell, and the actual required power of the fuel cell is obtained by multiplying the pulling load current by the voltage, so that the pulling load current can be obtained according to the voltage and the actual required power of the fuel cell.

According to the above embodiment of the present invention, the cooling control method of the fuel cell engine and the auxiliary machine may further include: determining the rotating speed of the cooling fan according to the magnitude of the cooling power; and controlling the cooling fan to run according to the rotating speed so as to regulate the temperature of the radiator.

As shown in fig. 4, a heat radiation fan is provided on one side of the heat sink, and the heat radiation fan can radiate heat from the heat sink. For example, the rotation speed of the cooling fan can be determined by the heat dissipation power, and then the cooling fan can be controlled to operate according to the rotation speed so as to regulate the temperature of the radiator, so that the operation efficiency of the fuel cell engine is improved.

In the above embodiment, determining the flow rate of the cooling liquid on the second cooling circuit according to the heat dissipation power includes: determining the flow corresponding to the heat radiation power according to a preset relation between the heat radiation power and the flow of the cooling liquid, wherein the preset relation is determined in advance according to the corresponding relation between the flow of the cooling liquid on the second cooling circuit corresponding to the auxiliary machine under different heat radiation powers; and determining the flow corresponding to the heat dissipation power as the flow of the cooling liquid on the second cooling loop.

In this embodiment, a preset relationship between the heat radiation power and the coolant flow rate may be predetermined according to test data of a history period, that is, how large the different heat radiation powers correspond to the coolant flow rates, respectively; in the actual use process, the corresponding cooling liquid flow can be searched in the preset relation according to the heat dissipation power value, and the operation efficiency of the fuel cell engine can be further improved.

Because the fuel cell engine needs proper inlet water temperature to ensure the efficient operation of the engine in the operation process, and the engine auxiliary machine comprises an air compressor, an air compressor controller, an intercooler and a hydrogen circulating pump which all need additional cooling water paths for cooling in the operation process so as to provide efficient operation for the engine, the cooling water flow rate and the temperature of the electric pile are different from those of the auxiliary machine, if a reasonable control method is not adopted, the whole water pipeline is very messy, and when the engine is arranged on the whole vehicle, the cooling water pipeline is very fussy to arrange, and great trouble is caused to a host factory.

Therefore, in the embodiment of the invention, only one radiator is utilized, two channels are provided, one channel is used for cooling a fuel cell engine, the other channel is used for cooling a DCDC, an air compressor, a controller, a hydrogen circulating pump, a controller and an intercooler, meanwhile, according to different water flow requirements and water temperature requirements of auxiliary machinery parts, a three-way ball valve is added to control water flow and water temperature of each branch, a temperature sensor is added to each branch, if the temperature sensor 1 is higher, a refrigerating device is started, the temperature sensor is detected after the cooling device passes through the cooling device, the water flow of the air compressor, the controller and the intercooler is controlled by an electric three-way ball valve, when the temperature of the cooling channel 2 is lower than the required temperature of the air compressor, the electric three-way ball valve is closed to flow into the air compressor and the controller, and the engine runs at idle speed, and when the temperature of the cooling channel 2 is lower than the required temperature of the air compressor, the electric three-way ball valve runs normally, and the high-efficiency running of the fuel cell engine is ensured.

It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.

From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of the embodiments of the present application.

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

The obtaining unit 61 is configured to obtain, after the fuel cell engine is started, a temperature value of the first cooling circuit when the coolant enters the electric pile of the fuel cell engine, to obtain a first inlet temperature value, and obtain a temperature value of the second cooling circuit when the coolant enters the auxiliary machine of the fuel cell engine, to obtain a second inlet temperature value, where the first cooling circuit is configured to cool the fuel cell engine, the second cooling circuit is configured to cool the auxiliary machine, and the auxiliary machine is configured to adjust a preset parameter affecting the first inlet temperature value, and the preset parameter at least includes: air intake amount, hydrogen circulation amount.

A determining unit 63, configured to determine a control manner of the first temperature adjusting component according to a magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determine a control manner of the second temperature adjusting component according to a magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, where the first temperature adjusting component is configured to adjust a temperature of the cooling liquid in the first cooling circuit, and the second temperature adjusting component is configured to adjust a temperature of the cooling liquid in the second cooling circuit.

And a cooling unit 65 for controlling the first temperature adjusting member and the second temperature adjusting member in a control manner such that the coolant in the first cooling circuit cools the fuel cell engine and the coolant in the second cooling circuit cools the auxiliary machinery.

Here, the above-mentioned obtaining unit 61, determining unit 63 and cooling unit 65 correspond to steps S102 to S106 in the above-mentioned embodiments, and the three units are the same as the examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in the above-mentioned embodiments.

As can be seen from the foregoing, in the solution described in the foregoing embodiment of the present invention, after the fuel cell engine is started, the obtaining unit may be configured to obtain a temperature value when the coolant on the first cooling circuit enters the stack of the fuel cell engine, obtain a first inlet temperature value, obtain a temperature value when the coolant on the second cooling circuit enters the auxiliary machine of the fuel cell engine, and obtain a second inlet temperature value, where the first cooling circuit is configured to cool the fuel cell engine, the second cooling circuit is configured to cool the auxiliary machine, and the auxiliary machine is configured to adjust a preset parameter affecting the first inlet temperature value, where the preset parameter at least includes: air intake amount, hydrogen circulation amount; then, a determining unit is used for determining a control mode of a first temperature adjusting component according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determining a control mode of a second temperature adjusting component according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, wherein the first temperature adjusting component is used for adjusting the temperature of cooling liquid in a first cooling loop, and the second temperature adjusting component is used for adjusting the temperature of cooling liquid in a second cooling loop; the first temperature adjusting component and the second temperature adjusting component are controlled by the cooling unit according to a control mode, so that the cooling liquid in the first cooling loop cools the fuel cell engine, the cooling liquid in the second cooling loop cools the auxiliary machine, the control mode of the temperature adjusting component on the cooling loop is determined according to the temperature of the electric pile inlet of the fuel cell engine and the temperature value when the cooling liquid enters the auxiliary machine, the temperature adjusting component is adjusted according to the control mode, the cooling liquid can control the electric pile of the fuel cell engine within a reasonable temperature range more quickly, and the operation efficiency of the fuel cell engine is improved.

In an alternative embodiment, the temperature regulating member includes: the first thermistor and the second thermistor, wherein one end of the first thermistor is connected with one end of the temperature sensor, and the other end of the first thermistor is connected with the flow regulating component; one end of the second thermistor is connected with a radiator of the fuel cell engine, and the other end of the second thermistor is connected with the flow regulating component; the temperature sensor is used for acquiring a first inlet temperature value, and the flow regulating component is used for regulating the flow of the cooling liquid on the first cooling loop; wherein the determining unit includes: the first determining module is used for determining that the control modes of the first thermistor and the second thermistor are started simultaneously when the first inlet temperature value is smaller than the first temperature threshold value; the second determining module is used for determining that the control mode of the first thermistor is closed and the control mode of the second thermistor is started when the first inlet temperature value is determined to be larger than the first temperature threshold value and smaller than the second temperature threshold value; and the third determining module is used for determining that the control modes of the first thermistor and the second thermistor are closed simultaneously when the first inlet temperature value is determined to be larger than the second temperature threshold value.

In an alternative embodiment, the cooling control device for a fuel cell engine and an auxiliary machine further includes one of: a first adjusting unit for adjusting the rotation speed of the water pump on the first cooling circuit so that the first inlet temperature value reaches a 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 adjusting part and the electric pile; and the second adjusting unit is used for adjusting the opening degree of the flow adjusting component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

In an alternative embodiment, the temperature regulating member includes: the cooling device comprises a cooling fan and a refrigerator, wherein the cooling fan is positioned at one side of a radiator in a second cooling loop and used for adjusting the temperature of the radiator; the refrigerator is arranged on the second cooling loop and used for adjusting the temperature of the cooling liquid in the second cooling loop; the auxiliary machine includes: an air compressor and an intercooler; wherein the determining unit includes: the fourth determining module is used for determining that the control mode of the refrigerator is closed when the second inlet temperature value is lower than the third temperature threshold value, and the control mode of the air compressor and the intercooler is used for conveying anti-freezing liquid to the air compressor and the intercooler; and the fifth determining module is used for determining that the control mode of the refrigerator is on and the control modes of the air compressor and the intercooler are stopping the flow of the cooling liquid to the air compressor and the intercooler when the second inlet temperature value is higher than the third temperature threshold value.

In an alternative embodiment, the auxiliary machine includes: the device comprises a voltage converter and a hydrogen circulating pump, wherein the voltage converter is used for converting the power output by the fuel cell engine, the hydrogen circulating pump is used for controlling the hydrogen circulating amount, and the cooling control device of the fuel cell engine and auxiliary machines further comprises: a determining unit for determining heat radiation power required by the auxiliary machine after the fuel cell engine is started; the determining unit is also used for determining the flow of the cooling liquid on the second cooling loop according to the heat dissipation power; the determining unit is further configured to determine an opening degree of a control valve on the second cooling circuit according to a magnitude of the flow, where the control valve includes: the first control valve is used for controlling the flow rate of the cooling liquid flowing through the voltage converter, and the second control valve is used for controlling the flow rate of the cooling liquid flowing through the hydrogen circulating pump.

In an alternative embodiment, the determining unit comprises: the acquisition module is used for acquiring the first actual required power of the target vehicle where the fuel cell engine is located; a sixth determining module, configured to determine a second actual required power of the fuel cell engine corresponding to the fuel cell according to the first actual required power; a seventh determining module, configured to determine a load current of the fuel cell according to the second actual required power; and the eighth determining module is used for determining the heat dissipation power required by the auxiliary machine according to the load-pulling current.

In an alternative embodiment, the cooling control device for a fuel cell engine and an auxiliary machine further includes: a determining unit, configured to determine a rotation speed of the cooling fan according to the magnitude of the cooling power; and the control unit is used for controlling the cooling fan to run according to the rotating speed so as to regulate the temperature of the radiator.

In an alternative embodiment, determining the flow of the cooling fluid on the second cooling circuit based on the heat dissipation power includes: a ninth determining module, configured to determine a flow corresponding to the heat dissipation power according to a preset relationship between the heat dissipation power and the flow of the cooling liquid, where the preset relationship is determined in advance according to a corresponding relationship between the flows of the cooling liquid on the second cooling circuit corresponding to the auxiliary machine under different heat dissipation powers; and the tenth determining module is used for determining the flow corresponding to the heat dissipation power as the flow of the cooling liquid on the second cooling circuit.

According to another aspect of the embodiment of the present invention, there is also provided a vehicle using the fuel cell engine and the cooling control method of the auxiliary machine of any one of the above.

Alternatively, in the present embodiment, the above-described computer-readable storage medium may be located in any one of a group of computer terminals in a computer network, or in any one of a group of communication devices.

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: after the fuel cell engine is started, acquiring a temperature value when cooling liquid on a first cooling loop enters a galvanic pile of the fuel cell engine to obtain a first inlet temperature value, and acquiring a temperature value when cooling liquid on a second cooling loop enters an auxiliary machine of the fuel cell engine to obtain a second inlet temperature value, wherein the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, and the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount; determining a control mode of a first temperature adjusting component according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determining a control mode of a second temperature adjusting component according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, wherein the first temperature adjusting component is used for adjusting the temperature of cooling liquid in a first cooling loop, and the second temperature adjusting component is used for adjusting the temperature of cooling liquid in a second cooling loop; the first temperature adjusting part and the second temperature adjusting part are controlled in a control manner so that the cooling liquid in the first cooling circuit cools the fuel cell engine and the cooling liquid in the second cooling circuit cools the auxiliary machinery.

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: when the first inlet temperature value is smaller than the first temperature threshold value, the control mode of the first thermistor and the control mode of the second thermistor are determined to be started simultaneously; when the first inlet temperature value is determined to be larger than the first temperature threshold value and smaller than the second temperature threshold value, the control mode of the first thermistor is determined to be closed, and the control mode of the second thermistor is determined to be started; and when the first inlet temperature value is determined to be larger than the second temperature threshold value, determining that the control modes of the first thermistor and the second thermistor are closed simultaneously.

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

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: when the second inlet temperature value is determined to be lower than the third temperature threshold value, determining that the control mode of the refrigerator is closed, and the control modes of the air compressor and the intercooler are that antifreeze fluid is conveyed to the air compressor and the intercooler; and when the second inlet temperature value is higher than the third temperature threshold value, the control mode of the refrigerator is determined to be on, and the control modes of the air compressor and the intercooler are determined to stop the flow of the cooling liquid to the air compressor and the intercooler.

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: after the fuel cell engine is started, determining the heat dissipation power required by the auxiliary machine; determining the flow of the cooling liquid on the second cooling loop according to the heat dissipation power; determining the opening degree of a control valve on the second cooling loop according to the flow, wherein the control valve comprises: the first control valve is used for controlling the flow rate of the cooling liquid flowing through the voltage converter, and the second control valve is used for controlling the flow rate of the cooling liquid flowing through the hydrogen circulating pump.

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: acquiring a first actual required power of a target vehicle where a fuel cell engine is located; determining a second actual required power of the fuel cell engine corresponding to the fuel cell according to the first actual required power; determining the load current of the fuel cell according to the second actual required power; and determining the heat dissipation power required by the auxiliary machine according to the load-pulling current.

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: determining the rotating speed of the cooling fan according to the magnitude of the cooling power; and controlling the cooling fan to run according to the rotating speed so as to regulate the temperature of the radiator.

Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: determining the flow corresponding to the heat radiation power according to a preset relation between the heat radiation power and the flow of the cooling liquid, wherein the preset relation is determined in advance according to the corresponding relation between the flow of the cooling liquid on the second cooling circuit corresponding to the auxiliary machine under different heat radiation powers; and determining the flow corresponding to the heat dissipation power as the flow of the cooling liquid on the second cooling loop.

According to another aspect of the embodiment of the present invention, there is also provided a processor for running a program, wherein the program runs to execute the cooling control method of the fuel cell engine and the auxiliary machine of any one of the above.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A cooling control method for a fuel cell engine and an auxiliary machine, comprising:

after the fuel cell engine is started, acquiring a temperature value when cooling liquid on a first cooling loop enters a pile of the fuel cell engine to obtain a first inlet temperature value, and acquiring a temperature value when cooling liquid on a second cooling loop enters an auxiliary machine of the fuel cell engine to obtain a second inlet temperature value, wherein the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount;

determining a control mode of a first temperature adjusting component according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, and determining a control mode of a second temperature adjusting component according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, wherein the first temperature adjusting component is used for adjusting the temperature of the cooling liquid in the first cooling loop, and the second temperature adjusting component is used for adjusting the temperature of the cooling liquid in the second cooling loop;

And controlling the first temperature regulating component and the second temperature regulating component according to the control mode so that the cooling liquid in the first cooling circuit cools the fuel cell engine, and the cooling liquid in the second cooling circuit cools the auxiliary machine.

2. The cooling control method of the fuel cell engine and auxiliary machinery according to claim 1, wherein the temperature adjusting means includes: the system comprises a first thermistor and a second thermistor, wherein one end of the first thermistor is connected with one end of a temperature sensor, and the other end of the first thermistor is connected with a flow regulating component; one end of the second thermistor is connected with a radiator of the fuel cell engine, and the other end of the second thermistor is connected with the flow regulating component; the temperature sensor is used for acquiring the first inlet temperature value, and the flow regulating component is used for regulating the flow of the cooling liquid on the first cooling circuit;

wherein, according to the magnitude relation between the first inlet temperature value and the corresponding temperature threshold value, determining the control mode of the first temperature adjusting component comprises:

when the first inlet temperature value is smaller than a first temperature threshold value, the control mode of the first thermistor and the control mode of the second thermistor are determined to be started simultaneously;

When the first inlet temperature value is determined to be larger than the first temperature threshold value and smaller than a second temperature threshold value, the control mode of the first thermistor is determined to be closed, and the control mode of the second thermistor is determined to be started;

and when the first inlet temperature value is determined to be larger than the second temperature threshold value, determining that the control modes of the first thermistor and the second thermistor are closed simultaneously.

3. The cooling control method of the fuel cell engine and the auxiliary machine according to claim 1 or 2, characterized by further comprising one of:

when it is determined that the actual required power of the fuel cell engine increases or decreases, adjusting the rotational speed of a water pump on the first cooling circuit so that the first inlet temperature value reaches a set temperature value, wherein the water pump is located between a flow regulating component and the electric pile;

and adjusting the opening degree of the flow adjusting component on the first cooling circuit so that the first inlet temperature value reaches the set temperature value.

4. The cooling control method of the fuel cell engine and auxiliary machinery according to claim 1, wherein the temperature adjusting means includes: the cooling device comprises a cooling fan and a refrigerator, wherein the cooling fan is positioned at one side of a radiator in the second cooling loop and is used for adjusting the temperature of the radiator; the refrigerator is arranged on the second cooling loop and is used for adjusting the temperature of the cooling liquid in the second cooling loop; the auxiliary machine includes: an air compressor and an intercooler;

Wherein, according to the magnitude relation between the second inlet temperature value and the corresponding temperature threshold value, determining the control mode of the second temperature adjusting component comprises:

when the second inlet temperature value is determined to be lower than a third temperature threshold value, determining that the control mode of the refrigerator is closed, and the control modes of the air compressor and the intercooler are used for conveying antifreeze fluid to the air compressor and the intercooler;

and when the second inlet temperature value is higher than the third temperature threshold value, determining that the control mode of the refrigerator is on, and stopping the flow of the cooling liquid to the air compressor and the intercooler.

5. The cooling control method of a fuel cell engine and auxiliary machine according to claim 4, wherein the auxiliary machine includes: the fuel cell system comprises a voltage converter and a hydrogen circulating pump, wherein the voltage converter is used for converting the power output by the fuel cell engine, the hydrogen circulating pump is used for controlling the hydrogen circulating amount, and the fuel cell system further comprises:

after the fuel cell engine is started, determining the heat dissipation power required by the auxiliary machine;

Determining the flow rate of the cooling liquid on the second cooling loop according to the heat dissipation power;

determining the opening degree of a control valve on the second cooling loop according to the flow, wherein the control valve comprises: the first control valve is used for controlling the flow rate of the cooling liquid flowing through the voltage converter, and the second control valve is used for controlling the flow rate of the cooling liquid flowing through the hydrogen circulating pump, and the flow rate is positively correlated with the opening degree of the control valve.

6. The cooling control method of the fuel cell engine and the auxiliary machine according to claim 5, characterized in that determining the required heat radiation power of the auxiliary machine includes:

acquiring a first actual required power of a target vehicle where the fuel cell engine is located;

determining a second actual required power of the fuel cell corresponding to the fuel cell of 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;

and determining the heat dissipation power required by the auxiliary machine according to the load current.

7. The cooling control method of the fuel cell engine and auxiliary machinery according to claim 5, further comprising:

Determining the rotating speed of the cooling fan according to the magnitude of the cooling power;

and controlling the cooling fan to run according to the rotating speed so as to regulate the temperature of the radiator.

8. The cooling control method of the fuel cell engine and auxiliary machinery according to claim 5, wherein determining the flow rate of the coolant on the second cooling circuit based on the heat radiation power includes:

determining the flow corresponding to the heat radiation power according to a preset relation between the heat radiation power and the flow of the cooling liquid, wherein the preset relation is determined in advance according to the corresponding relation between the flow of the cooling liquid on the second cooling circuit corresponding to the auxiliary machine under different heat radiation powers;

and determining the flow corresponding to the heat dissipation power as the flow of the cooling liquid on the second cooling loop.

9. A cooling control device for a fuel cell engine and an auxiliary machine, comprising:

the device comprises an acquisition unit, a first cooling loop and a second cooling loop, wherein the acquisition unit is used for acquiring a temperature value of a cooling liquid on the first cooling loop when the cooling liquid enters a galvanic pile of the fuel cell engine after the fuel cell engine is started to obtain a first inlet temperature value, acquiring a temperature value of a cooling liquid on the second cooling loop when the cooling liquid enters an auxiliary machine of the fuel cell engine to obtain a second inlet temperature value, the first cooling loop is used for cooling the fuel cell engine, the second cooling loop is used for cooling the auxiliary machine, the auxiliary machine is used for adjusting preset parameters affecting the first inlet temperature value, and the preset parameters at least comprise: air intake amount, hydrogen circulation amount;

A determining unit, configured to determine a control manner of a first temperature adjustment component according to a magnitude relation between the first inlet temperature value and a corresponding temperature threshold value, and determine a control manner of a second temperature adjustment component according to a magnitude relation between the second inlet temperature value and a corresponding temperature threshold value, where the first temperature adjustment component is configured to adjust a temperature of the cooling liquid in the first cooling circuit, and the second temperature adjustment component is configured to adjust a temperature of the cooling liquid in the second cooling circuit;

and a cooling unit configured to control the first temperature adjusting member and the second temperature adjusting member in the control manner such 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.

10. A vehicle using the cooling control method of the fuel cell engine and auxiliary machine according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program executes the cooling control method of the fuel cell engine and the auxiliary machine according to any one of claims 1 to 8.

12. A processor for running a program, wherein the program runs to execute the cooling control method of the fuel cell engine and auxiliary machine according to any one of claims 1 to 8.