CN114388851B - Heating control method and system of vehicle-mounted fuel cell engine - Google Patents
Heating control method and system of vehicle-mounted fuel cell engine Download PDFInfo
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- CN114388851B CN114388851B CN202210085511.2A CN202210085511A CN114388851B CN 114388851 B CN114388851 B CN 114388851B CN 202210085511 A CN202210085511 A CN 202210085511A CN 114388851 B CN114388851 B CN 114388851B
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- 239000000446 fuel Substances 0.000 title claims abstract description 159
- 238000010438 heat treatment Methods 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 29
- 230000007246 mechanism Effects 0.000 claims description 23
- 239000000110 cooling liquid Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000006872 improvement Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04268—Heating of fuel cells during the start-up of the fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention provides a heating control method of a vehicle-mounted fuel cell engine, belongs to the technical field of fuel cells, and solves the problem that the conventional heating control method is easy to cause the deficiency of power of a storage battery when the fuel cell engine is started and heated in a cold mode. The method comprises the following steps: after identifying that the low-voltage power supply is started and the fuel cell engine is standby, acquiring the ambient temperature at the current moment and matching the ambient temperature with a set valueT 1 Comparing if the ambient temperature is lower than the set valueT 1 Executing the next step, otherwise, not executing heating to the fuel cell engine; acquiring the output voltage of the low-voltage power supply, and judging whether the output voltage is higher than a set voltage threshold value; if yes, heating the fuel cell engine and executing the next step; otherwise, no heating is performed on the fuel cell engine; continuously monitoring the real-time temperature of the fuel cell engine until the temperature exceeds the upper thresholdT 2 When this is done, the heating is stopped. When the whole vehicle cannot disconnect the low-voltage power supply under specific conditions, the storage battery can be effectively protected.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a heating control method of a vehicle-mounted fuel cell engine.
Background
Fuel cell engines have the advantage of no pollution emissions, and currently, various automobile companies are developing fuel cell systems. The thermal management control of the fuel cell system is mainly divided into heat radiation control and heating control. In winter, the fuel cell system needs to be started below 0 ℃, so that the tail exhaust passage is heated in advance, and the water discharge and exhaust function faults caused by ice blockage in the tail exhaust passage are prevented.
Because there is the cold start heating demand, whole car electric quantity consumption can increase, when the vehicle can't in time break off the low-voltage power supply, can appear because the condition of the too much battery of electric quantity consumption is deficient, then leads to the unable start again of whole car.
Disclosure of Invention
In view of the above analysis, the embodiments of the present invention aim to provide a heating control method and system for a vehicle-mounted fuel cell engine, so as to solve the problem that the conventional heating control method is easy to cause battery power shortage when the vehicle-mounted fuel cell engine is reheated after cold start.
In one aspect, an embodiment of the present invention provides a heating control method for a vehicle-mounted fuel cell engine, including the steps of:
after identifying that the low-voltage power supply is started and the fuel cell engine is standby, acquiring the ambient temperature at the current moment and comparing the ambient temperature with a set value T 1 Comparing if the ambient temperature is lower than the set value T 1 Executing the next step, otherwise, not executing heating to the fuel cell engine;
acquiring the output voltage of the low-voltage power supply, and judging whether the output voltage is higher than a set voltage threshold value; if yes, heating the fuel cell engine and executing the next step; otherwise, no heating is performed on the fuel cell engine;
continuously monitoring the real-time temperature of the fuel cell engine, comparing the temperature with a preset temperature threshold range until the temperature exceeds a threshold upper limit T 2 When this is done, the heating is stopped.
The beneficial effects of the technical scheme are as follows: compared with the prior art, the method has the advantages that the original heating requirement can be met, meanwhile, due to the fact that the judgment of the voltage of the power supply circuit is introduced, when the whole vehicle cannot disconnect the low-voltage power supply under specific conditions, the output voltage of the low-voltage power supply is monitored to be lower than a set threshold value, the starting is avoided, and then the storage battery is protected, and the overdischarge condition is avoided.
Based on a further improvement of the above method, the method further comprises:
after heating for a set time, ifThe real-time temperature of the fuel cell engine is below the lower threshold limit T of the temperature threshold range 3 Obtaining the output voltage of the low-voltage power supply at the end time of the set time;
and judging whether the voltage is higher than a set voltage threshold again, if so, continuing to heat the fuel cell engine, otherwise, immediately stopping the heating, and not executing the subsequent heating of the fuel cell engine.
The beneficial effects of the further scheme are as follows: the judgment of the voltage of the power supply circuit after heating is started is increased. After warm-up, if the real-time temperature of the fuel cell engine is below the lower threshold T of the temperature threshold range 3 The output voltage of the low-voltage power supply needs to be detected again, so that the storage battery is protected, and the overdischarge condition is further avoided.
Further, the set value T 1 Upper threshold limit T 2 Lower threshold limit T 3 Satisfy T 1 ＜T 3 ＜T 2 。
The beneficial effects of the further scheme are as follows: through the arrangement, temperature control logic is added, and the judgment of a power supply circuit is combined, so that the battery can be effectively heated, and meanwhile, the battery is protected.
Further, the heating includes at least: the tail pipe of the fuel cell engine is heated, and the coolant of the fuel cell engine is heated.
The beneficial effects of the further scheme are as follows: the fuel cell engine can be effectively heated during low-temperature cold start, so that the fuel cell engine can be started quickly.
Further, the power source start and fuel cell engine standby are identified by:
acquiring output currents of a low-voltage power supply and a fuel cell engine in real time;
judging whether the output current amplitude of the low-voltage power supply is higher than a preset current threshold value or not, and setting the output current of the fuel cell engine to be zero; if yes, judging that the low-voltage power supply is started and the fuel cell engine is standby, otherwise, judging that the low-voltage power supply is started and the fuel cell engine is not standby, and continuing the judgment of the output current of the low-voltage power supply and the fuel cell engine at the next moment.
The beneficial effects of the further scheme are as follows: by the method, the starting of the low-voltage power supply and the standby state of the fuel cell engine can be effectively identified.
In another aspect, an embodiment of the present invention provides a heating control system of a vehicle-mounted fuel cell engine, including:
the data acquisition module is used for acquiring the ambient temperature, the output voltage of the low-voltage power supply and the real-time temperature of the fuel cell engine in real time and sending the ambient temperature, the output voltage of the low-voltage power supply and the real-time temperature of the fuel cell engine to the data processing and control module;
the data processing and controlling module is used for recognizing the environment temperature at the current moment and the set value T after the starting of the low-voltage power supply and the standby of the fuel cell engine 1 Comparing if the ambient temperature is not lower than the set value T 1 No heating is performed on the fuel cell engine if the ambient temperature is lower than the set value T 1 Further acquiring the output voltage of the low-voltage power supply, judging whether the output voltage is higher than a set voltage threshold, if not, not executing heating on the fuel cell engine, if so, sending a starting heating instruction to an executing mechanism, continuously monitoring the real-time temperature of the fuel cell engine, comparing the temperature with a preset temperature threshold range until the temperature exceeds a threshold upper limit T 2 When the heating stop instruction is sent to the executing mechanism;
the executing mechanism is used for executing heating on the fuel cell engine after receiving the starting heating instruction sent by the data processing and control module; and stopping heating the fuel cell engine after receiving the heating stopping instruction sent by the data processing and control module.
The beneficial effects of the technical scheme are as follows: compared with the prior art, the method has the advantages that the original heating requirement can be met, meanwhile, due to the fact that the judgment of the voltage of the power supply circuit is introduced, when the whole vehicle cannot disconnect the low-voltage power supply under specific conditions, the output voltage of the low-voltage power supply is monitored to be lower than a set threshold value, the starting is avoided, and then the storage battery is protected, and the overdischarge condition is avoided.
Based on the further improvement of the system, the data processing and control module is also used for heating the real-time temperature of the fuel cell engine and the threshold lower limit T of the temperature threshold range after the set time 3 Comparing if the real-time temperature of the fuel cell engine is below the lower threshold limit T of the temperature threshold range 3 Obtaining the output voltage of the low-voltage power supply at the end time of the set time, judging whether the voltage is higher than a set voltage threshold again, if so, sending a continuous heating instruction to the executing mechanism, otherwise, sending a heating stopping instruction to the executing mechanism, and not sending a heating starting instruction or a continuous heating instruction to the executing mechanism;
and the executing mechanism is also used for continuously executing heating on the fuel cell engine after receiving the continuous heating instruction sent by the data processing and control module.
The beneficial effects of the further scheme are as follows: the judgment of the voltage of the power supply circuit after heating is started is increased. After warm-up, if the real-time temperature of the fuel cell engine is below the lower threshold T of the temperature threshold range 3 The output voltage of the low-voltage power supply needs to be detected again, so that the storage battery is protected, and the overdischarge condition is further avoided.
Further, the set value T 1 Upper threshold limit T 2 Lower threshold limit T 3 Satisfy T 1 ＜T 3 ＜T 2 。
The beneficial effects of the further scheme are as follows: through the arrangement, temperature control logic is added, and the judgment of a power supply circuit is combined, so that the battery can be effectively heated, and meanwhile, the battery is protected.
Further, the data acquisition module further includes:
the environment temperature sensor is arranged in the whole car compartment and used for acquiring the environment temperature in real time;
the voltage and current integrated sensor is arranged at the output end of the low-voltage power supply and is used for acquiring the output voltage and the output current of the low-voltage power supply in real time;
the current sensor is arranged at the power supply end of the fuel cell engine and is used for acquiring the output current of the fuel cell engine in real time;
the liquid temperature sensor is arranged at the cooling liquid output end of the fuel cell engine and is used for acquiring the cooling liquid temperature of the fuel cell engine in real time and taking the cooling liquid temperature as the real-time temperature of the fuel cell engine.
The beneficial effects of the further scheme are as follows: through the arrangement, the input data required by the data processing and control module can be effectively acquired.
Further, the actuator further includes:
the electric heater is arranged on a cooling liquid circulation loop of the fuel cell engine, the input end of the electric heater is connected with the cooling liquid output end of the fuel cell engine, the output end of the electric heater is connected with the cooling liquid input end of the fuel cell engine, and the control end of the electric heater is connected with the output end of the data processing and control module;
the heating tail exhaust electromagnetic valve is arranged on a tail exhaust pipeline of the fuel cell engine, and the control end of the heating tail exhaust electromagnetic valve is connected with the output end of the data processing and control module and is used for heating the tail exhaust pipeline at the layout position.
The beneficial effects of the further scheme are as follows: with the above arrangement, the inside and outside of the fuel cell engine stack can be effectively heated.
The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 is a schematic diagram showing the steps of a heating control method of an in-vehicle fuel cell engine of embodiment 1;
fig. 2 is a schematic diagram showing a heating control method of the vehicle-mounted fuel cell engine of embodiment 2;
fig. 3 shows a schematic diagram of the composition of the heating control system of the in-vehicle fuel cell engine of embodiment 3.
Reference numerals:
t1-set value T 1 The method comprises the steps of carrying out a first treatment on the surface of the T2-upper threshold T 2 The method comprises the steps of carrying out a first treatment on the surface of the T3-lower threshold T 3 The method comprises the steps of carrying out a first treatment on the surface of the V1-set voltage threshold.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.
In order to better assist the skilled person in understanding the specific technical solutions in the embodiments of the present invention, technical terms involved in the solutions are first introduced.
A fuel cell engine: an apparatus for converting chemical energy of a fuel, mainly hydrogen and oxygen, into electric energy based on a redox reaction. The hydrogen comes mainly from a high pressure gas cylinder containing purified hydrogen. The main source of oxygen is air in nature. The main factors affecting the redox reaction are the temperature, pressure and humidity of the fuel gas.
Cold start: refers to the start-up process of the fuel cell engine when the ambient temperature is below 0 c.
And the tail exhaust valve is an electromagnetic valve arranged on a tail exhaust pipeline of the fuel cell engine.
Example 1
In one embodiment of the present invention, a heating control method of a vehicle-mounted fuel cell engine is disclosed, as shown in fig. 1, comprising the steps of:
s1, after identifying that a low-voltage power supply is started and a fuel cell engine is standby, acquiring the environmental temperature at the current moment and comparing the environmental temperature with a set value T 1 Comparing if the ambient temperature is lower than the set value T 1 Executing the next step, otherwise, not executing heating to the fuel cell engine;
s2, obtaining output voltage of the low-voltage power supply, and judging whether the output voltage is higher than a set voltage threshold value or not; if yes, heating the fuel cell engine and executing the next step; otherwise, no heating is performed on the fuel cell engine;
s3, continuously monitoring the real-time temperature of the fuel cell engine, comparing the temperature with a preset temperature threshold range until the temperature exceeds a threshold upper limit T 2 When this is done, the heating is stopped.
Specifically, the set value T 1 The temperature threshold is determined for the environment in degrees celsius. Upper threshold limit T 2 The first heating determination temperature threshold is also the upper limit of the preset temperature threshold range, and is expressed in degrees celsius. The set voltage threshold is a determination threshold V of the power supply voltage 1 The unit is V.
The above-mentioned fuel cell engine is a prior art, and a specific structure can be described in the prior patent CN201920667362.4, and a relation with a low voltage power supply (low voltage distribution box) and a storage battery (nickel-metal hydride battery) can be described in the patent CN 201821664393.6.
The above-described approaches to performing heating on the fuel cell engine are divided into heating outside and inside the stack. Wherein the heating of the outside of the stack, for example of the tail pipe, is described in patent cn2015110135012. X; for heating the inside of the stack, see for example CN201920040611.7 for bipolar plates or CN201110367137.7 for heating by cooling liquid.
Compared with the prior art, the method provided by the embodiment not only can meet the original heating requirement, but also can not be started when the output voltage of the low-voltage power supply is monitored to be lower than the set threshold value under the specific condition because the judgment of the voltage of the power supply circuit is introduced, so that the storage battery is protected, and the overdischarge condition is avoided.
Example 2
The improvement over the embodiment 1, the method further comprises the steps of:
s4, after heating for a set time, if the real-time temperature of the fuel cell engine is lower than the threshold lower limit T of the temperature threshold range 3 Obtaining the output voltage of the low-voltage power supply at the end time of the set time;
s5, judging whether the voltage is higher than a set voltage threshold again, if so, continuing to heat the fuel cell engine, otherwise, immediately stopping the heating, and not executing subsequent heating of the fuel cell engine.
The principle of the method can be seen in fig. 2, and the over-discharge condition of the low-voltage storage battery of the whole vehicle can be effectively prevented through the heating control strategy.
Preferably, the set value T 1 Upper threshold limit T 2 Lower threshold limit T 3 Satisfy T 1 ＜T 3 ＜T 2 。
Preferably, the heating at least includes: the tail pipe of the fuel cell engine is heated, and the coolant of the fuel cell engine is heated.
Preferably, the power source start-up and fuel cell engine standby is identified by:
s11, acquiring output currents of a low-voltage power supply and a fuel cell engine in real time;
s12, judging whether the output current amplitude of the low-voltage power supply is higher than a preset current threshold value or not, and setting the output current of the fuel cell engine to be zero; if yes, judging that the low-voltage power supply is started and the fuel cell engine is standby, otherwise, judging that the low-voltage power supply is started and the fuel cell engine is not standby, and continuing the judgment of the output current of the low-voltage power supply and the fuel cell engine at the next moment.
Compared with embodiment 1, the method provided in this embodiment increases the lower threshold limit T 3 And further judging the output voltage of the low-voltage power supply, so that the overdischarge condition of the low-voltage storage battery of the whole vehicle can be effectively prevented.
Example 3
The invention also discloses a heating control system of the vehicle-mounted fuel cell engine corresponding to the method of the embodiment 1 or 2, which comprises a data acquisition module, a data processing and control module and an executing mechanism which are sequentially connected, as shown in fig. 3.
The data acquisition module is used for acquiring the ambient temperature, the output voltage of the low-voltage power supply and the real-time temperature of the fuel cell engine in real time and sending the ambient temperature, the output voltage of the low-voltage power supply and the real-time temperature of the fuel cell engine to the data processing and control module.
The data processing and controlling module is used for recognizing the environment temperature at the current moment and the set value T after the starting of the low-voltage power supply and the standby of the fuel cell engine 1 Comparing if the ambient temperature is not lower than the set value T 1 No heating is performed on the fuel cell engine if the ambient temperature is lower than the set value T 1 Further acquiring the output voltage of the low-voltage power supply, judging whether the output voltage is higher than a set voltage threshold, if not, not executing heating on the fuel cell engine, if so, sending a starting heating instruction to an executing mechanism, continuously monitoring the real-time temperature of the fuel cell engine, comparing the temperature with a preset temperature threshold range until the temperature exceeds a threshold upper limit T 2 And sending a heating stopping instruction to the executing mechanism.
The executing mechanism is used for executing heating on the fuel cell engine after receiving the starting heating instruction sent by the data processing and control module; and stopping heating the fuel cell engine after receiving the heating stopping instruction sent by the data processing and control module.
Example 4
The improvement of embodiment 3 is that the data processing and control module is also used for heating for a set timeThreshold lower limit T of real-time temperature and temperature threshold range of fuel cell engine 3 Comparing if the real-time temperature of the fuel cell engine is below the lower threshold limit T of the temperature threshold range 3 Obtaining the output voltage of the low-voltage power supply at the end time of the set time, judging whether the voltage is higher than a set voltage threshold again, if so, sending a continuous heating instruction to the executing mechanism, otherwise, sending a heating stopping instruction to the executing mechanism, and not sending a heating starting instruction or a continuous heating instruction to the executing mechanism;
and the executing mechanism is also used for continuously executing heating on the fuel cell engine after receiving the continuous heating instruction sent by the data processing and control module.
Preferably, the set value T 1 Upper threshold limit T 2 Lower threshold limit T 3 Satisfy T 1 ＜T 3 ＜T 2 。
Preferably, the data acquisition module further comprises an ambient temperature sensor, a voltage-current integrated sensor and a liquid temperature sensor.
The environment temperature sensor is arranged in the whole car carriage and used for acquiring the environment temperature in real time.
The voltage and current integrated sensor is arranged at the output end of the low-voltage power supply and is used for acquiring the output voltage and the output current of the low-voltage power supply in real time.
The current sensor is arranged at the power supply end of the fuel cell engine and used for acquiring the output current of the fuel cell engine in real time.
The liquid temperature sensor is arranged at the cooling liquid output end of the fuel cell engine and is used for acquiring the cooling liquid temperature of the fuel cell engine in real time and taking the cooling liquid temperature as the real-time temperature of the fuel cell engine.
Preferably, the actuating mechanism further comprises an electric heater and a heating tail electromagnetic valve.
The electric heater is arranged on a cooling liquid circulation loop of the fuel cell engine, the input end of the electric heater is connected with the cooling liquid output end of the fuel cell engine, the output end of the electric heater is connected with the cooling liquid input end of the fuel cell engine, and the control end of the electric heater is connected with the output end of the data processing and control module;
the heating tail exhaust electromagnetic valve is arranged on a tail exhaust pipeline of the fuel cell engine, and the control end of the heating tail exhaust electromagnetic valve is connected with the output end of the data processing and control module and is used for heating the tail exhaust pipeline at the layout position.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. A heating control method of a vehicle-mounted fuel cell engine, characterized by comprising the steps of:
after identifying that the low-voltage power supply is started and the fuel cell engine is standby, acquiring the ambient temperature at the current moment and comparing the ambient temperature with a set value T 1 Comparing if the ambient temperature is lower than the set value T 1 Executing the next step, otherwise, not executing heating to the fuel cell engine;
acquiring the output voltage of the low-voltage power supply, and judging whether the output voltage is higher than a set voltage threshold value; if yes, heating the fuel cell engine and executing the next step; otherwise, no heating is performed on the fuel cell engine;
continuously monitoring the real-time temperature of the fuel cell engine, comparing the temperature with a preset temperature threshold range until the temperature exceeds a threshold upper limit T 2 Stopping the heating when the temperature is higher than the preset temperature; t (T) 1 ＜T 2 The method comprises the steps of carrying out a first treatment on the surface of the And, in addition, the processing unit,
the heating control method identifies the start of the power supply and the standby of the fuel cell engine by:
acquiring output currents of a low-voltage power supply and a fuel cell engine in real time;
judging whether the output current amplitude of the low-voltage power supply is higher than a preset current threshold value or not, and setting the output current of the fuel cell engine to be zero; if yes, judging that the low-voltage power supply is started and the fuel cell engine is standby, otherwise, judging that the low-voltage power supply is started and the fuel cell engine is not standby, and continuing the judgment of the output current of the low-voltage power supply and the fuel cell engine at the next moment.
2. The heating control method of the in-vehicle fuel cell engine according to claim 1, characterized by further comprising the steps of:
after the heating set time, if the real-time temperature of the fuel cell engine is lower than the threshold lower limit T of the temperature threshold range 3 Obtaining the output voltage of the low-voltage power supply at the end time of the set time;
and judging whether the voltage is higher than a set voltage threshold again, if so, continuing to heat the fuel cell engine, otherwise, immediately stopping the heating, and not executing the subsequent heating of the fuel cell engine.
3. The heating control method of an in-vehicle fuel cell engine according to claim 2, wherein the set value T 1 Upper threshold limit T 2 Lower threshold limit T 3 Satisfy T 1 ＜T 3 ＜T 2 。
4. A heating control method of an in-vehicle fuel cell engine according to any one of claims 1 to 3, wherein said heating includes at least: the tail pipe of the fuel cell engine is heated, and the coolant of the fuel cell engine is heated.
5. A heating control system of a vehicle-mounted fuel cell engine, comprising:
the data acquisition module is used for acquiring the ambient temperature, the output voltage of the low-voltage power supply and the real-time temperature of the fuel cell engine in real time and sending the ambient temperature, the output voltage of the low-voltage power supply and the real-time temperature of the fuel cell engine to the data processing and control module;
the data processing and controlling module is used for recognizing the environment temperature at the current moment and the set value T after the starting of the low-voltage power supply and the standby of the fuel cell engine 1 Comparing if the ambient temperature is not lower than the set value T 1 No heating is performed on the fuel cell engine if the ambient temperature is lower than the set value T 1 Further acquiring the output voltage of the low-voltage power supply, judging whether the output voltage is higher than a set voltage threshold, if not, not executing heating on the fuel cell engine, if so, sending a starting heating instruction to an executing mechanism, continuously monitoring the real-time temperature of the fuel cell engine, comparing the temperature with a preset temperature threshold range until the temperature exceeds a threshold upper limit T 2 When the heating stop instruction is sent to the executing mechanism; t (T) 1 ＜T 2 ；
The executing mechanism is used for executing heating on the fuel cell engine after receiving the starting heating instruction sent by the data processing and control module; and stopping heating the fuel cell engine after receiving the heating stopping instruction sent by the data processing and control module; and, in addition, the processing unit,
the data processing and control module performs the following procedures to identify the start of the low-voltage power source and the standby of the fuel cell engine:
acquiring output currents of a low-voltage power supply and a fuel cell engine in real time;
judging whether the output current amplitude of the low-voltage power supply is higher than a preset current threshold value or not, and setting the output current of the fuel cell engine to be zero; if yes, judging that the low-voltage power supply is started and the fuel cell engine is standby, otherwise, judging that the low-voltage power supply is started and the fuel cell engine is not standby, and continuing the judgment of the output current of the low-voltage power supply and the fuel cell engine at the next moment.
6. The heating control system of claim 5, wherein the data processing and control module is further configured to heat the fuel cell engine at a real-time temperature after a set timeThreshold lower limit T of temperature threshold range 3 Comparing if the real-time temperature of the fuel cell engine is below the lower threshold limit T of the temperature threshold range 3 Obtaining the output voltage of the low-voltage power supply at the end time of the set time, judging whether the voltage is higher than a set voltage threshold again, if so, sending a continuous heating instruction to the executing mechanism, otherwise, sending a heating stopping instruction to the executing mechanism, and not sending a heating starting instruction or a continuous heating instruction to the executing mechanism;
and the executing mechanism is also used for continuously executing heating on the fuel cell engine after receiving the continuous heating instruction sent by the data processing and control module.
7. The heating control system of an in-vehicle fuel cell engine according to claim 6, wherein the set value T 1 Upper threshold limit T 2 Lower threshold limit T 3 Satisfy T 1 ＜T 3 ＜T 2 。
8. The heating control method of an in-vehicle fuel cell engine according to any one of claims 5 to 7, wherein the data acquisition module further includes:
the environment temperature sensor is arranged in the whole car compartment and used for acquiring the environment temperature in real time;
the voltage and current integrated sensor is arranged at the output end of the low-voltage power supply and is used for acquiring the output voltage and the output current of the low-voltage power supply in real time;
the current sensor is arranged at the power supply end of the fuel cell engine and is used for acquiring the output current of the fuel cell engine in real time;
the liquid temperature sensor is arranged at the cooling liquid output end of the fuel cell engine and is used for acquiring the cooling liquid temperature of the fuel cell engine in real time and taking the cooling liquid temperature as the real-time temperature of the fuel cell engine.
9. The heating control system of an in-vehicle fuel cell engine according to any one of claims 5 to 7, wherein the actuator further includes:
the electric heater is arranged on a cooling liquid circulation loop of the fuel cell engine, the input end of the electric heater is connected with the cooling liquid output end of the fuel cell engine, the output end of the electric heater is connected with the cooling liquid input end of the fuel cell engine, and the control end of the electric heater is connected with the output end of the data processing and control module;
the heating tail exhaust electromagnetic valve is arranged on a tail exhaust pipeline of the fuel cell engine, and the control end of the heating tail exhaust electromagnetic valve is connected with the output end of the data processing and control module and is used for heating the tail exhaust pipeline at the layout position.
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