CN117013007A - Flow determination method and device for fuel cell cooling system and electronic equipment - Google Patents
Flow determination method and device for fuel cell cooling system and electronic equipment Download PDFInfo
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- CN117013007A CN117013007A CN202210459075.0A CN202210459075A CN117013007A CN 117013007 A CN117013007 A CN 117013007A CN 202210459075 A CN202210459075 A CN 202210459075A CN 117013007 A CN117013007 A CN 117013007A
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- 238000001816 cooling Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000446 fuel Substances 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000005259 measurement Methods 0.000 claims abstract description 38
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000004590 computer program Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000000110 cooling liquid Substances 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012360 testing method Methods 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04417—Pressure; Ambient pressure; Flow of the coolant
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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
- H01M8/04029—Heat exchange using liquids
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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
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- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a flow determining method, a flow determining device and electronic equipment of a fuel cell cooling system, and relates to the technical field of fuel cells, wherein the flow determining method comprises the steps of determining a pressure value of a water pump inlet according to a stack inlet pressure calibration value and a stack inlet pressure actual measurement value under the current working condition; performing difference calculation based on the actual measurement value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain the lift of the water pump; according to the Map curve of the full rotation speed of the water pump and the lift of the water pump, the current main path flow of the cooling system is determined, and the main path flow is detected in a mode of not adding a flow detection device, so that the technical problems of error, hysteresis and the like caused by the fact that the main path flow is not considered to regulate the temperature of the battery pack in the prior art are solved.
Description
Technical Field
The present invention relates to the technical field of fuel cells, and in particular, to a method and an apparatus for determining a flow rate of a cooling system of a fuel cell, and an electronic device.
Background
With the development of vehicle technology, fuel cell automobiles are widely used, and among them, the safety of the use of fuel cells in the fuel cell automobiles is increasingly focused.
The inventor researches and discovers that the main flow of the cooling system plays a key role in the temperature regulation of the battery pack by the battery thermal management system, and if the main flow participates in thermal management, the accuracy and timeliness of the temperature regulation of the battery pack can be ensured. However, the current general cooling system does not consider measuring the main flow rate, and the inventor finds that in the prior art, if the main flow rate is to be measured, a flow sensor or a flowmeter needs to be added to the cooling system. The measurement mode can cause the system arrangement space to be not compact, the cost and the cost of the multi-electric device to be increased, and the defects of complexity improvement of EMC electromagnetic interference and the like can also occur.
Disclosure of Invention
The invention aims to provide a flow determination method, a flow determination device and electronic equipment of a fuel cell cooling system, which are used for detecting main flow in a mode of not adding a flow detection device so as to relieve the technical problems of error, hysteresis and the like caused by not considering the main flow to the temperature regulation of a battery pack in the prior art.
In a first aspect, an embodiment of the present invention provides a flow rate determining method of a fuel cell cooling system, the method including:
determining the pressure value of the water pump inlet according to the standard value of the pressure of the electric pile inlet and the actual measurement value of the pressure of the electric pile inlet under the current working condition;
calculating a difference value based on the actual measurement value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain a water pump lift;
and determining the current main path flow of the cooling system according to the full-rotation speed Map curve of the water pump and the lift of the water pump.
With reference to the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the cooling system includes an overflow tank in an open state under normal pressure, so as to ensure that a pressure value of an inlet of the water pump is the same as an atmospheric pressure value.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the current working condition includes working conditions corresponding to multiple different altitudes, and the step of determining the pressure value of the water pump inlet according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current working condition includes:
obtaining an actual measurement value of the pressure of the electric pile inlet under the working condition corresponding to the current altitude;
and determining the pressure value of the water pump inlet under the working condition corresponding to the current altitude according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value.
With reference to the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, where the step of determining, according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value, a pressure value of a water pump inlet under a working condition corresponding to a current altitude includes:
calculating the pressure difference of the whole vehicle running according to the difference value between the standard value of the pressure of the electric pile inlet and the actual measurement value of the pressure of the electric pile inlet;
and determining the pressure value of the water pump inlet under the working condition corresponding to the current elevation based on the difference value of the pressure difference between the standard atmospheric pressure corresponding to the sea level and the current elevation.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the method further includes:
and sending the current main flow to a battery thermal management system so that the battery thermal management system can regulate the temperature of the battery pack by controlling the cooling system based on the current main flow.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the step of determining, according to a pump full speed Map curve and the pump head, a current main flow of the cooling system includes:
acquiring the rotating speed of the current water pump;
and determining the current main path flow corresponding to the cooling system according to the Map curve of the full rotation speed of the water pump, the lift of the water pump and the rotation speed.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where, before the step of determining the pressure value of the water pump inlet according to the actual measurement value of the stack inlet pressure and the calibrated value of the stack inlet pressure under the current working condition, the method further includes:
and calibrating a Map curve of the full rotation speed of the water pump in advance, and obtaining a stack inlet pressure calibration value under different rotation speeds.
In a second aspect, an embodiment of the present invention further provides a flow rate determining device of a fuel cell cooling system, the device including:
the first determining module is used for determining the pressure value of the water pump inlet according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current working condition;
the calculation module is used for carrying out difference calculation based on the actual measurement value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain the lift of the water pump;
and the second determining module is used for determining the current main flow of the cooling system according to the full-rotation speed Map curve of the water pump and the pump lift.
In a third aspect, an embodiment provides an electronic device, including a memory, a processor, where the memory stores a computer program executable on the processor, and where the processor implements the steps of the method according to any of the foregoing embodiments when the computer program is executed.
In a fourth aspect, embodiments provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement the steps of the method of any of the preceding embodiments.
The embodiment of the invention provides a flow determining method, a flow determining device and electronic equipment of a fuel cell cooling system, which can determine the pressure value of a water pump inlet by using a stack inlet pressure calibration value and an actual measurement value on the premise of not adding an additional flow sensing device, obtain the water pump lift based on the pressure difference between the water pump inlet and the water pump outlet, and give consideration to the acquired self-feedback rotating speed of the water pump and the Map curve of the full rotating speed of the water pump, so that the main flow of the cooling system under the current working condition can be obtained, and the timely effectiveness of heat management of a battery pack is facilitated.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for determining a flow rate of a cooling system for a fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cooling system according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for determining a flow rate of a cooling system for a fuel cell according to an embodiment of the present invention;
fig. 4 is a schematic functional block diagram of a flow rate determining device of a fuel cell cooling system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware architecture of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The fuel cell cooling system is used for adjusting the operation temperature of the fuel cell and ensuring that the fuel cell has good power output under different working conditions.
A complete fuel cell cooling system generally includes:
(1) The water pump is used for driving the cooling liquid to flow;
(2) The temperature control valve is used for adjusting the opening and closing or opening of the loop;
(3) The radiator and the fan cooperate to radiate the heat in the system to the external environment;
(4) A water overflow tank for ensuring proper liquid amount of the cooling system and receiving bubbles generated in the system;
(5) And the pipeline is used for connecting the parts.
At present, the application temperature of a fuel cell is generally monitored through a battery thermal management system, and the temperature is regulated in real time through a cooling system, but the regulation mode has larger error and hysteresis; if the vehicle is in the environment with lower temperature, the battery cannot be timely and accurately temperature-adjusted, so that the working efficiency of the battery and the power performance of the whole vehicle can be affected.
The inventor researches and discovers that the timeliness of the temperature regulation of the cooling system can be realized by monitoring the flow of the main path of the cooling system. However, the fuel cell vehicle generally does not detect the main flow of the cooling circuit, which makes it difficult to monitor the operation state of the cooling circuit water pump and the main heat dissipation flow, and is disadvantageous to the thermal management control of the fuel cell of the vehicle.
Based on the above, the flow determination method, the flow determination device and the electronic equipment of the fuel cell cooling system provided by the embodiment of the invention can realize the monitoring of the main flow of the cooling system under the condition that the flow detection component is not arranged in the loop, thereby ensuring the timeliness of the temperature adjustment of the battery pack and simultaneously saving the cost.
For the convenience of understanding the present embodiment, a flow rate determining method of a fuel cell cooling system according to an embodiment of the present invention will be described in detail.
The structure of the cooling system may be as shown in fig. 2, in which no flow rate detecting part is provided; a stack (fuel cell) is a device that generates electric power by the reaction of hydrogen and oxygen. The radiator is a device for radiating heat in the cooling system to the external environment and can be matched with a fan for use. The three-way temperature control valve is used for adjusting the opening and closing and opening of the loop. The water pump is used for driving the cooling liquid to circulate in the system. The overflow tank is a container for storing cooling liquid, so that the proper cooling liquid amount in the system is ensured, and bubbles generated by the cooling liquid are received, so that air resistance is avoided; the pile inlet and the pile outlet are also provided with pressure sensors P1 and P2 which are used for measuring the pressure value of the pile inlet and outlet;
as shown in fig. 1, the method includes:
step S102, determining the pressure value of the water pump inlet according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current working condition.
The pressure sensor at the inlet of the electric pile can obtain the actual measurement value of the pressure at the inlet of the electric pile under each working condition; the electric pile inlet pressure calibration value is obtained by calibrating in advance, and is calibrated under the condition that the whole car battery runs at sea level, namely under different working conditions, the electric pile inlet pressure calibration value corresponds to the condition that the whole car battery runs at sea level.
Step S104, calculating a difference value based on the actual measured value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain the pump lift.
It will be appreciated that as can be seen from fig. 2, one of the pressure sensors is disposed between the stack inlet pressure, which is equivalent to the water pump outlet pressure, and the water pump outlet.
And S106, determining the current main path flow of the cooling system according to the full-rotation speed Map curve of the water pump and the lift of the water pump.
The Map curve of the full rotation speed of the water pump can only know the association relationship among the rotation speed of the water pump, the lift of the water pump and the current main flow. It can be understood that the Map graph (also called contour Map or cloud Map) of the water pump is a data graph generated during water pump test, and mainly reflects the water pump efficiency distribution condition under different rotation speeds and torques. As an alternative embodiment, the Map graph of the water pump can be drawn by using MATLAB after such data is led into the control device by detecting the efficiency points of the water pump at various speeds and torques.
In the preferred embodiment of practical application, the pressure value of the inlet of the water pump can be determined by using the standard value and the measured value of the pressure of the inlet of the electric pile on the premise of not adding an additional flow sensing device, the pump lift is obtained based on the pressure difference between the inlet and the outlet of the water pump, and the self-feedback rotating speed of the water pump and the Map curve of the full rotating speed of the water pump which can be acquired are taken into consideration, so that the main flow of the cooling system under the current working condition can be obtained, and the timely effectiveness of the thermal management of the battery pack is facilitated.
In some embodiments, a more efficient thermal management scheme for the battery pack may be employed than a scheme in which the thermal management system adjusts the temperature of the battery pack based on temperature; illustratively, the above method further comprises:
step 1.1), the current main flow is sent to a battery thermal management system, so that the battery thermal management system adjusts the temperature of the battery pack by controlling the cooling system based on the current main flow.
It should be noted that, under the condition that the current main flow is known, the thermal management system can directly monitor and adjust the main flow of the cooling system of the fuel cell according to the target cooling flow corresponding to the current working condition, so as to alleviate the technical problem of hysteresis in temperature adjustment of the fuel cell in the prior art.
It can be understood that when the thermal management system adjusts the temperature of the battery pack based on the temperature, the defects of battery pack temperature acquisition error, delay of temperature acquisition and the like exist, and the thermal management system controls the main flow of the cooling system for adjusting the temperature of the battery pack based on the acquired temperature, so that larger error and hysteresis can be generated, and the application reliability of the battery pack in the whole vehicle driving process is not facilitated.
In some embodiments, the measurement of the main path flow rate of the cooling system can be ensured to be more accurate through pre-calibrating parameters; illustratively, prior to step S102, the above method further comprises:
and 2.1), calibrating a Map curve of the full rotation speed of the water pump in advance, and obtaining a stack inlet pressure calibration value under different rotation speeds.
For example, the cooling liquid used by a real vehicle at sea level (the atmospheric pressure is 101.325 kpa) can be used for calibrating a Map curve of the full rotation speed of the water pump, and the water pump can be calibrated to obtain corresponding pressure values at the inlet of the electric pile at different rotation speeds, namely, the pressure calibration value of the inlet pressure of the electric pile (sea level). The two parameters are combined to form a table shown in fig. 3, so that the stack inlet pressure calibration value (sea level) at different water pump rotating speeds can be known; as an alternative embodiment, the above-mentioned parameter correspondence may be input into a software program or a control device as a basic parameter for a subsequent flow determination control method.
In some embodiments, the cooling system includes an overflow tank in an open-to-atmosphere condition for ensuring that the pressure at the inlet of the water pump is the same as the atmospheric pressure.
In other words, the overflow tank is opened at normal pressure, so that the cooling water path is communicated with the atmosphere, and the pressure value of the inlet of the water pump is ensured to be the same as the atmospheric pressure.
On the basis that the pressure value of the inlet of the water pump is the same as the atmospheric pressure value, the current working condition comprises a plurality of working conditions corresponding to different altitudes, and the embodiment of the invention can determine the main road flow of the current working condition, and can determine the main road flow of the whole vehicle under any working condition with different altitudes so as to ensure the safety and the reliability of the vehicle running; wherein, for any altitude, the main road flow can be determined, and step S102 includes:
and 3.1) obtaining an actual measurement value of the pressure of the electric pile inlet under the working condition corresponding to the current altitude.
Here, the pressure measured value under the working condition corresponding to the altitude at the moment can be obtained through the pressure sensor arranged at the pile inlet.
And 3.2) determining the pressure value of the water pump inlet under the working condition corresponding to the current altitude according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value.
Illustratively, calculating the pressure difference of the current elevation of the whole vehicle running according to the difference value of the standard value of the electric pile inlet pressure and the actual measurement value of the electric pile inlet pressure; and determining the pressure value of the water pump inlet under the working condition corresponding to the current altitude based on the difference value of the pressure difference between the standard atmospheric pressure corresponding to the sea level and the current altitude.
The air atmospheric pressure corresponding to the sea level is a standard atmospheric pressure value when the altitude is 0, namely 101.325Kpa, and the standard atmospheric pressure value under different altitudes can be clearly known by the person skilled in the art. It can be understood that the difference between the standard atmospheric pressure corresponding to the sea level and the pressure difference of the current altitude, and the atmospheric pressure value of the current altitude is obtained; according to the foregoing embodiment, in the case where the overflow tank is opened at normal pressure, the pressure value of the water pump inlet is the same as the atmospheric pressure, so the atmospheric pressure value of the current altitude can be equivalent to the pressure value of the water pump inlet under the working condition corresponding to the current altitude.
In addition, in the actual application process, the altitude of the current whole vehicle can be reversely deduced according to the atmospheric pressure value of the current altitude, so that a driver can control the vehicle to operate, such as adjusting the tire pressure and the like.
It should be noted that, the main flow of the cooling system can be obtained under the full-altitude working condition, the running state of the water pump and the main heat dissipation flow can be determined for the fuel cell system, and the main flow can be used as an important input parameter for controlling the thermal management temperature.
In some embodiments, through the association relationship between the parameters represented by the Map curve of the full rotation speed of the water pump, the main flow of the cooling system can be determined accurately without a flow detection device, and step S106 includes:
step 4.1), obtaining the current rotation speed of the water pump.
And 4.2), determining the current main flow corresponding to the cooling system according to the Map curve of the full rotation speed of the water pump, the lift of the water pump and the rotation speed.
As shown in fig. 3, a Map curve of the full rotation speed of the water pump is obtained through pre-calibration, and the inlet pressure of the electric pile is calibrated at different rotation speeds of the water pump; comparing pressure differences between a stack inlet pressure calibration value and a stack inlet pressure actual measurement value under different altitude pressures by combining the rotating speed fed back by the water pump according to the Map graph of the full rotating speed of the water pump; for example, when the rotation speed of the water pump is 1000Rpm, the standard value of the pressure of the electric pile inlet is A, the actual measurement value of the pressure of the electric pile inlet is B, and the pressure difference between the standard value and the actual measurement value is A-B; based on the pressure difference, the altitude of the whole vehicle and the pressure value of the inlet of the water pump can be solved, and the difference between the pressure of the inlet of the electric pile and the pressure of the inlet of the water pump is the pump lift. And then according to the association relation between the parameters represented in the Map curve of the calibrated full rotation speed of the water pump, obtaining the main flow at the moment according to the obtained pump lift and rotation speed.
It can be understood that the Map curve of the full rotation speed of the water pump can represent the correlation among the lift, the rotation speed and the main path flow of the water pump; if any two parameters are known, the remaining parameter values can be determined based on the curve.
The embodiment of the invention utilizes the pile inlet pressure sensor conventionally arranged in the water path in the fuel cell system to replace the flow sensor, reduces redundant design, reduces the use cost of the system, obtains a main path flow value based on the actual measurement value of the pile inlet measured by the pressure sensor and the calibration value of the water pump, and guides the thermal management control strategy and monitors the state of the water path according to the main path flow value.
As shown in fig. 4, an embodiment of the present invention provides a flow rate determining device of a cooling system of a fuel cell, in which a flow rate detecting part is not provided, the device comprising:
the first determining module is used for determining the pressure value of the water pump inlet according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current working condition;
the calculation module is used for carrying out difference calculation based on the actual measurement value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain the lift of the water pump;
and the second determining module is used for determining the current main flow of the cooling system according to the full-rotation speed Map curve of the water pump and the pump lift.
According to the embodiment of the invention, the flow sensor is not required to be additionally arranged in the cooling system, the defects of high cost, complex system structure and the like are avoided, and the actual flow of the cooling main path under the full-altitude working condition can be obtained without additionally arranging the flow sensor and is used as a parameter input to refer to a heat conduction management control strategy. The cooling system is simpler in design and lower in cost.
In some embodiments, the cooling system includes an overflow tank in an open-at-normal pressure state for ensuring that the pressure value at the inlet of the water pump is the same as the atmospheric pressure value.
In some embodiments, the current working conditions include working conditions corresponding to a plurality of different altitudes, and the first determining module is further specifically configured to obtain an actual measurement value of a stack inlet pressure under the working condition corresponding to the current altitude; and determining the pressure value of the water pump inlet under the working condition corresponding to the current altitude according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value.
In some embodiments, the first determining module is further specifically configured to calculate a pressure difference of a current altitude of the whole vehicle running according to a difference between a stack inlet pressure calibration value and the stack inlet pressure actual measurement value; and determining the pressure value of the water pump inlet under the working condition corresponding to the current elevation based on the difference value of the pressure difference between the standard atmospheric pressure corresponding to the sea level and the current elevation.
In some embodiments, the apparatus further comprises: and the adjusting module is used for sending the current main path flow to a battery thermal management system so that the battery thermal management system adjusts the temperature of the battery pack by controlling the cooling system based on the current main path flow.
In some embodiments, the second determining module is further specifically configured to obtain a current rotation speed of the water pump; and determining the current main path flow corresponding to the cooling system according to the Map curve of the full rotation speed of the water pump, the lift of the water pump and the rotation speed.
In some embodiments, before the step of determining the pressure value of the water pump inlet according to the measured value of the stack inlet pressure and the calibrated value of the stack inlet pressure under the current working condition, the apparatus further comprises: the calibration module is used for calibrating the Map curve of the full rotation speed of the water pump in advance and obtaining the stack inlet pressure calibration values at different rotation speeds.
In the embodiment of the present invention, the electronic device may be, but is not limited to, a personal computer (Personal Computer, PC), a notebook computer, a monitoring device, a server, and other computer devices with analysis and processing capabilities.
As an exemplary embodiment, referring to fig. 5, an electronic device 110 includes a communication interface 111, a processor 112, a memory 113, and a bus 114, the processor 112, the communication interface 111, and the memory 113 being connected by the bus 114; the memory 113 is used for storing a computer program supporting the processor 112 to execute the method, and the processor 112 is configured to execute the program stored in the memory 113.
The machine-readable storage medium referred to herein may be any electronic, magnetic, optical, or other physical storage device that can contain or store information, such as executable instructions, data, or the like. For example, a machine-readable storage medium may be: RAM (Radom Access Memory, random access memory), volatile memory, non-volatile memory, flash memory, a storage drive (e.g., hard drive), any type of storage disk (e.g., optical disk, dvd, etc.), or a similar storage medium, or a combination thereof.
The non-volatile medium may be a non-volatile memory, a flash memory, a storage drive (e.g., hard drive), any type of storage disk (e.g., optical disk, dvd, etc.), or a similar non-volatile storage medium, or a combination thereof.
It can be understood that the specific operation method of each functional module in this embodiment may refer to the detailed description of the corresponding steps in the above method embodiment, and the detailed description is not repeated here.
The computer readable storage medium provided by the embodiments of the present invention stores a computer program, where the computer program code may implement the method described in any of the foregoing embodiments when executed, and the specific implementation may refer to the method embodiment and will not be described herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method of determining a flow rate of a fuel cell cooling system, the method comprising:
determining the pressure value of the water pump inlet according to the standard value of the pressure of the electric pile inlet and the actual measurement value of the pressure of the electric pile inlet under the current working condition;
calculating a difference value based on the actual measurement value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain a water pump lift;
and determining the current main path flow of the cooling system according to the full-rotation speed Map curve of the water pump and the lift of the water pump.
2. The method of claim 1, wherein the cooling system includes an overflow tank in an open-to-atmosphere condition for ensuring that the pressure value at the water pump inlet is the same as the atmospheric pressure value.
3. The method according to claim 2, wherein the current working condition includes working conditions corresponding to a plurality of different altitudes, and the step of determining the pressure value of the water pump inlet according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current working condition includes:
obtaining an actual measurement value of the pressure of the electric pile inlet under the working condition corresponding to the current altitude;
and determining the pressure value of the water pump inlet under the working condition corresponding to the current altitude according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value.
4. A method according to claim 3, wherein the step of determining the pressure value of the water pump inlet under the working condition corresponding to the current altitude according to the stack inlet pressure calibration value and the actual stack inlet pressure value comprises the following steps:
calculating the pressure difference of the current elevation of the whole vehicle running according to the difference value between the standard value of the pressure of the electric pile inlet and the actual measurement value of the pressure of the electric pile inlet;
and determining the pressure value of the water pump inlet under the working condition corresponding to the current elevation based on the difference value of the pressure difference between the standard atmospheric pressure corresponding to the sea level and the current elevation.
5. The method according to claim 1, wherein the method further comprises:
and sending the current main flow to a battery thermal management system so that the battery thermal management system can regulate the temperature of the battery pack by controlling the cooling system based on the current main flow.
6. The method of claim 1, wherein the step of determining the current main flow of the cooling system based on a pump full speed Map curve and the pump head comprises:
acquiring the rotating speed of the current water pump;
and determining the current main path flow corresponding to the cooling system according to the Map curve of the full rotation speed of the water pump, the lift of the water pump and the rotation speed.
7. The method of claim 1, wherein prior to the step of determining the pressure value of the water pump inlet based on the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current operating conditions, the method further comprises:
and calibrating a Map curve of the full rotation speed of the water pump in advance, and obtaining a stack inlet pressure calibration value under different rotation speeds.
8. A flow rate determining device of a fuel cell cooling system, characterized by comprising:
the first determining module is used for determining the pressure value of the water pump inlet according to the stack inlet pressure calibration value and the stack inlet pressure actual measurement value under the current working condition;
the calculation module is used for carrying out difference calculation based on the actual measurement value of the pressure of the electric pile inlet and the pressure value of the water pump inlet to obtain the lift of the water pump;
and the second determining module is used for determining the current main flow of the cooling system according to the full-rotation speed Map curve of the water pump and the pump lift.
9. An electronic device comprising a memory, a processor and a program stored on the memory and capable of running on the processor, the processor implementing the method of any one of claims 1 to 7 when executing the program.
10. A computer readable storage medium, characterized in that the computer program is stored in the readable storage medium, which computer program, when executed, implements the method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210459075.0A CN117013007A (en) | 2022-04-27 | 2022-04-27 | Flow determination method and device for fuel cell cooling system and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210459075.0A CN117013007A (en) | 2022-04-27 | 2022-04-27 | Flow determination method and device for fuel cell cooling system and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN117013007A true CN117013007A (en) | 2023-11-07 |
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| CN202210459075.0A Pending CN117013007A (en) | 2022-04-27 | 2022-04-27 | Flow determination method and device for fuel cell cooling system and electronic equipment |
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| Country | Link |
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| CN (1) | CN117013007A (en) |
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- 2022-04-27 CN CN202210459075.0A patent/CN117013007A/en active Pending
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