CN113733919A - Method for calculating remaining endurance mileage of fuel cell vehicle - Google Patents

Method for calculating remaining endurance mileage of fuel cell vehicle Download PDF

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CN113733919A
CN113733919A CN202111117173.8A CN202111117173A CN113733919A CN 113733919 A CN113733919 A CN 113733919A CN 202111117173 A CN202111117173 A CN 202111117173A CN 113733919 A CN113733919 A CN 113733919A
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fuel cell
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whole vehicle
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CN113733919B (en
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刘旭鹏
童珎
李科迪
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SAIC Volkswagen Automotive Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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Abstract

The invention provides a method for calculating the remaining endurance mileage of a fuel cell vehicle, which comprises the following steps: electrifying and reading the whole vehicle energy consumption value recorded when the fuel cell electric vehicle is electrified last time and the efficiency value of the fuel cell system when the fuel cell electric vehicle is shut down last time; calculating the residual mass of hydrogen according to the real-time state of the whole vehicle hydrogen storage system; calculating the efficiency value of the fuel cell system according to the real-time state of the whole vehicle fuel cell system; calculating available energy of the residual hydrogen according to the residual mass of the hydrogen and the efficiency value of the fuel cell system; calculating the residual energy of the whole vehicle and calculating the real-time energy consumption of the whole vehicle according to the available energy of the residual hydrogen and the residual energy of the high-voltage battery; calculating the endurance mileage of the whole vehicle according to the real-time energy consumption of the whole vehicle and the residual energy of the whole vehicle; and outputting the driving mileage of the whole vehicle. The method has good real-time performance, eliminates the influence of various factors and can enable the calculation of the remaining mileage to be more accurate.

Description

Method for calculating remaining endurance mileage of fuel cell vehicle
Technical Field
The invention relates to a fuel cell automobile development technology, in particular to a method for calculating the remaining endurance mileage of a fuel cell automobile.
Background
In recent years, the problems of energy exhaustion and environmental pollution are receiving increasing attention, and energy-saving and environment-friendly new energy automobiles are vigorously promoted in the world, wherein fuel cell automobiles receive more and more attention and gradually get into the public vision. The pure electric vehicle is influenced by driving habits, such as sudden acceleration, and the influence of the remaining endurance mileage on the actual endurance cannot be reflected.
Currently, the remaining range is estimated by a series of methods and reported to the user by instrument display. Accurate display of the remaining endurance mileage will be helpful to eliminate the "mileage anxiety" of the user. However, in the prior art, the estimation method of the remaining endurance mileage is not perfect, and the estimation is not accurate, so that accurate endurance mileage information cannot be provided for the driver.
For a developer of the whole vehicle, the most accurate calculation method of the remaining driving mileage is found out according to the real-time state of the whole vehicle, the working condition of a user and other factors, the actual remaining driving mileage of the whole vehicle is displayed in real time, and the user requirement is met to the maximum extent.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for calculating the remaining endurance mileage of a fuel cell automobile, and the method can accurately obtain the endurance mileage of the automobile in real time.
In order to achieve the purpose, the invention provides a method for calculating the remaining driving mileage of a fuel cell vehicle, which is characterized by comprising the following steps:
step one, electrifying and reading an entire vehicle energy consumption value recorded when the fuel cell electric vehicle is electrified last time and an efficiency value of a fuel cell system when the fuel cell electric vehicle is shut down last time;
calculating the residual mass of hydrogen according to the real-time state of the whole vehicle hydrogen storage system;
calculating the efficiency value of the fuel cell system according to the real-time state of the whole vehicle fuel cell system;
step four, calculating available energy of the residual hydrogen according to the residual mass of the hydrogen and the efficiency value of the fuel cell system;
step five, calculating the residual energy of the whole vehicle according to the available energy of the residual hydrogen and the residual energy of the high-voltage battery;
step six, calculating the real-time energy consumption of the whole vehicle according to the hydrogen parameters, the fuel cell parameters, the high-voltage battery parameters and the real-time speed of the fuel cell electric vehicle;
step seven, calculating the endurance mileage of the whole vehicle according to the real-time energy consumption of the whole vehicle and the residual energy of the whole vehicle;
and step eight, outputting the driving mileage of the whole vehicle.
Preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
in the third step, the efficiency value eta of the fuel cell systemFcComprises the following steps:
Figure BDA0003275890660000021
wherein eta isFCIs the fuel cell system efficiency value;
Figure BDA0003275890660000022
the efficiency value of the fuel cell system at the last shutdown is obtained;
n is the number of the fuel cell stack monomers;
Figure BDA0003275890660000031
is the n-thiThe single voltage of the fuel cell stack;
Tfc_timerun time for the fuel cell system;
Ttimethe pass filtering is a multiple of 10;
wherein the fuel cell system efficiency value ηFCThe calculation is updated every 10 seconds and stored.
Preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
in the second step, the hydrogen residual mass
Figure BDA0003275890660000032
Comprises the following steps:
Figure BDA0003275890660000033
wherein, P0The initial pressure of the hydrogen cylinder;
t is the hydrogen cylinder temperature;
Plthe allowable cut-off pressure for the hydrogen cylinder;
Vtankis the volume of the hydrogen cylinder.
Preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
in the sixth step, the real-time energy consumption C of the whole vehiclevehicleComprises the following steps:
Figure BDA0003275890660000034
wherein, P0The initial pressure of the hydrogen cylinder;
t is the hydrogen cylinder temperature;
Vtankis the hydrogen cylinder volume;
Piis a hydrogen cylinder tiThe moment pressure;
Ub(t) is the voltage of the high voltage battery at time t;
Figure BDA0003275890660000041
the output current of the high-voltage battery at the moment t;
v (t) is the real-time speed of the fuel cell electric vehicle;
Tvehicle_timeis the operating time of the fuel cell electric vehicle;
CStandard_cyclethe energy consumption value is the energy consumption value of the fuel cell electric automobile under the standard working condition;
CKL15on/offpowering the fuel cellRecording the whole vehicle energy consumption value when the vehicle is powered off last time;
wherein, the real-time energy consumption of the whole vehicle CvehicleThe calculation is updated every 10 seconds and stored.
Preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
in the fourth step, the residual hydrogen can be used as energy
Figure BDA0003275890660000042
Comprises the following steps:
Figure BDA0003275890660000043
preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
in the fifth step, the residual energy E of the whole vehiclevehicleComprises the following steps:
Figure BDA0003275890660000044
wherein E isbatteryIs the remaining energy of the high-voltage battery.
Preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
in the seventh step, the driving mileage R of the whole vehiclevehicleComprises the following steps:
Figure BDA0003275890660000051
wherein E isvehicleIs the remaining energy of the entire vehicle, CvehicleAnd the energy consumption of the whole vehicle is real-time.
Preferably, the invention further provides a method for calculating the remaining endurance mileage of the fuel cell vehicle, which is characterized in that,
step eight further comprises, determining whether the vehicle is powered down,
if the power is not off, turning to the step one;
and if the power is off, storing the energy consumption value of the whole vehicle recorded when the power is off and the efficiency value of the fuel cell system when the fuel cell system is shut down last time so as to directly read the energy consumption value of the whole vehicle after the fuel cell vehicle is powered on next time, and ending.
Compared with the prior art, the invention has the following advantages:
firstly, the real-time performance is good, and the current endurance mileage can be reflected according to the real-time state of the whole fuel cell;
secondly, the hydrogen quality calculation is more accurate, and the influence of environmental factors on the hydrogen quality calculation is eliminated;
thirdly, the method of the invention brings the energy consumption of all electric devices (high-voltage devices and low-voltage devices) of the whole vehicle into energy consumption calculation, can calculate the hydrogen consumption of the whole vehicle and the energy consumption of a battery pack of the whole vehicle according to the current actual driving condition of a user, and can enable the calculation of the remaining mileage to be more accurate.
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The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the invention. In the drawings:
fig. 1 is a flowchart illustrating a method for calculating a remaining driving range of a fuel cell vehicle according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, various steps may be processed in reverse order or simultaneously. Meanwhile, other operations are added to or removed from these processes.
Fig. 1 is a flow chart of a method for calculating the remaining range of a fuel cell vehicle according to a preferred embodiment of the present invention.
The following steps are explained in detail in conjunction with the flowchart:
in step 101, after the whole vehicle is powered on, firstly reading a whole vehicle energy consumption value C recorded when the fuel cell electric vehicle is powered off last timeKL15on/offAnd the efficiency value of the fuel cell system at the last shutdown
Figure BDA0003275890660000081
The power-off refers to the power-off of the whole vehicle, that is, all electric devices of the whole vehicle are in a power-off state, and the power-off refers to the power-off of the fuel cell system, that is, only the fuel cell system is powered off, and other electric devices of the whole vehicle may still work.
In step 102, the residual mass of hydrogen is calculated according to the real-time state of the hydrogen storage system of the whole vehicle
Figure BDA0003275890660000082
The calculation formula is as follows:
Figure BDA0003275890660000083
wherein the content of the first and second substances,
Figure BDA0003275890660000084
the hydrogen residual mass, in g,
P0the initial pressure of the hydrogen cylinder is set,
t is the temperature of the hydrogen cylinder,
Plis the allowable cut-off pressure of the hydrogen cylinder,
Vtankis the volume of the hydrogen cylinder.
And 103, calculating and storing the efficiency value of the fuel cell system according to the real-time state of the whole vehicle, updating every 10s, and updating the updating result to a memory.
Wherein the fuel cell system efficiency value etaFCIs calculated as follows:
Figure BDA0003275890660000091
wherein eta isFCFor the fuel cell system efficiency value (%),
Figure BDA0003275890660000092
is the efficiency value at the last shutdown of the fuel cell system,
n is the number of the fuel cell stack monomers,
Figure BDA0003275890660000093
is n thiThe cell voltage (V) of the sheet fuel cell stack,
0.296 is a coefficient related to the heating value of hydrogen,
Tfc_timefor the fuel cell system operation time(s),
Ttimethe pass filtering is a multiple of 10.
In the above equation (2), the calculation of the fuel cell system efficiency value is divided into two cases.
In the first case:
when the running time of the fuel cell system is less than or equal to 10 seconds, the fuel cell system is in a starting process and is ready to enter an idle running state, the real-time efficiency value of the fuel cell system is in an unstable state at the moment, and in order to eliminate real-time calculation errors, the efficiency value stored when the fuel cell system is shut down last time is adopted.
In the second case:
when the running time of the fuel cell system is more than or equal to 10 seconds, the fuel cell system is indicated to enter a stable running state, and the real-time efficiency of the fuel cell system can be reflected in real time.
In the above formula (2), the fuel cell system operation time Tfc_timeThe efficiency value can reflect the real-time performance of the system.
Moreover, the formula eliminates the influence of environmental factors on the hydrogen quality calculation, so that the hydrogen quality calculation is more accurate.
In step 104, the remaining hydrogen available energy is calculated based on the hydrogen and the fuel cell related parameters
Figure BDA0003275890660000101
The following were used:
Figure BDA0003275890660000102
wherein the content of the first and second substances,
Figure BDA0003275890660000103
is the energy (kWh) which can be output after the hydrogen is converted by the fuel cell.
In the above formula (3), the hydrogen cylinder temperature T and the fuel cell system efficiency value η in the formula (2)FCAlso better reflects the available energy of the residual hydrogen
Figure BDA0003275890660000104
Real-time performance of the system.
In step 105, the remaining energy E of the whole vehicle is calculatedvehicle：
Figure BDA0003275890660000105
Wherein E isbatteryIs the remaining energy of the high-voltage battery.
In step 106, calculating the real-time energy consumption C of the whole vehiclevehicleEvery 10s, and updating the result of each update into the memory,
Figure BDA0003275890660000106
Figure BDA0003275890660000111
wherein the content of the first and second substances,
Figure BDA0003275890660000112
the energy (kWh) which can be output after the hydrogen gas is converted by the fuel cell system,
P0the initial pressure (Mpa) of the hydrogen cylinder when the whole vehicle is electrified,
t is the temperature (DEG C) of the hydrogen cylinder,
Vtankis the volume (L) of the hydrogen cylinder,
n is the number of the fuel cell stack monomers,
Figure BDA0003275890660000113
is n thiThe cell voltage (V) of the sheet fuel cell stack,
Piis a hydrogen cylinder tiThe pressure (Mpa) at the moment,
Ub(t) is the voltage of the high voltage battery at time t,
Figure BDA0003275890660000114
the output current of the high-voltage battery at time t,
v (t) is the real-time speed (km/h) of the fuel cell electric vehicle,
Tvehicle_timefor the run time of the fuel cell electric vehicle,
CStandard_cyclethe energy consumption value under the standard working condition of the fuel cell electric automobile,
CKL15on/offand reading the recorded whole vehicle energy consumption value of the fuel cell electric vehicle when the fuel cell electric vehicle is powered off last time by a step 101.
Wherein, the energy consumption value C under the standard working conditionStandard_cvcleThe method is obtained by comprehensively calculating the energy consumption of high-voltage/low-voltage electric devices of the whole vehicle through simulation, system bench test and whole vehicle bench test under different working conditions.
Whole vehicle energy consumption value C recorded when fuel cell electric vehicle is powered off last timeKL15on/offHere, the real-time energy consumption of the whole vehicle CvehicleIs divided intoThree cases are:
in the first case:
when the vehicle is just started, but the vehicle speed is 0, the whole vehicle driving system does not use the energy of the whole vehicle, only high/low voltage devices such as an air conditioner and a radio use the energy of the whole vehicle, so that the energy consumption value under the standard working condition is adopted to obtain CStandard_cycleTo represent the overall vehicle energy consumption at this time.
In the second case:
the vehicle is started, the vehicle speed is greater than 0, but the driving distance is less than 100m, the working state of the whole vehicle driving system is in an idle state at the moment, the power system does not enter a stable working state, and the energy conversion efficiency does not really reflect the real-time efficiency of the power system at the moment, so the energy consumption value C of the whole vehicle recorded when the fuel cell electric vehicle is powered off last time is adoptedKL15on/offTo represent the overall vehicle energy consumption at this time.
In the third case:
the vehicle is started, the speed is more than 0, but the running distance is more than 100m, and the working state of the whole vehicle driving system is in a stable running state at the moment.
Through the three conditions, the energy state of the whole vehicle and the real-time efficiency of a power system are reflected in real time, and meanwhile, the energy consumption of all electric devices (high-voltage devices and low-voltage devices) of the whole vehicle is brought into energy consumption calculation, so that the calculation of the remaining mileage can be more accurate according to the current actual driving condition of a user.
In step 107, calculating the driving mileage R of the whole vehicle on the basis of the real-time energy consumption of the whole vehicle obtained in the previous stepvehicleComprises the following steps:
Figure BDA0003275890660000121
wherein E isvehicleIs the remaining energy of the entire vehicle, CvehicleAnd the energy consumption of the whole vehicle is real-time.
Step 108, outputting the remaining endurance mileage data of the step 107;
step 109, judging whether the vehicle is powered off, if not, turning to step 102, continuing to calculate the residual endurance mileage in real time, and if so, turning to step 110;
step 110, storing the energy consumption value of the whole vehicle recorded when the vehicle is powered off and the efficiency value of the fuel cell system when the fuel cell system is powered off last time for the fuel cell vehicle to be directly read after being powered on next time;
and step 111, ending.
By adopting the method for calculating the remaining endurance mileage of the fuel cell automobile, the method has the following beneficial effects:
firstly, the real-time performance is good, and the current endurance mileage can be reflected according to the real-time state of the whole fuel cell;
secondly, the hydrogen quality calculation is more accurate, and the influence of environmental factors on the hydrogen quality calculation is eliminated;
and thirdly, the energy consumption of all electric devices (high-voltage devices and low-voltage devices) of the whole vehicle is brought into energy consumption calculation, the hydrogen consumption of the whole vehicle and the energy consumption of a battery pack of the whole vehicle can be calculated according to the current actual running condition of a user, and the calculation of the remaining mileage can be more accurate.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.
Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data block," module, "" engine, "" unit, "" component, "or" system. The processor may be one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), digital signal processing devices (DAPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or a combination thereof. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips … …), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD) … …), smart cards, and flash memory devices (e.g., card, stick, key drive … …).
The computer readable medium may comprise a propagated data signal with the computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take any of a variety of forms, including electromagnetic, optical, and the like, or any suitable combination. The computer readable medium can be any computer readable medium that can communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or device. Program code on a computer readable medium may be propagated over any suitable medium, including radio, electrical cable, fiber optic cable, radio frequency signals, or the like, or any combination of the preceding.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.
Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.
Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.

Claims (8)

1. A method for calculating the remaining driving mileage of a fuel cell vehicle is characterized by comprising the following steps:
step one, electrifying and reading an entire vehicle energy consumption value recorded when the fuel cell electric vehicle is electrified last time and an efficiency value of a fuel cell system when the fuel cell electric vehicle is shut down last time;
calculating the residual mass of hydrogen according to the real-time state of the whole vehicle hydrogen storage system;
calculating the efficiency value of the fuel cell system according to the real-time state of the whole vehicle fuel cell system;
step four, calculating available energy of the residual hydrogen according to the residual mass of the hydrogen and the efficiency value of the fuel cell system;
step five, calculating the residual energy of the whole vehicle according to the available energy of the residual hydrogen and the residual energy of the high-voltage battery;
step six, calculating the real-time energy consumption of the whole vehicle according to the hydrogen parameters, the fuel cell parameters, the high-voltage battery parameters and the real-time speed of the fuel cell electric vehicle;
step seven, calculating the endurance mileage of the whole vehicle according to the real-time energy consumption of the whole vehicle and the residual energy of the whole vehicle;
and step eight, outputting the driving mileage of the whole vehicle.
2. The method of claim 1, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
in the third step, the efficiency value eta of the fuel cell systemFCComprises the following steps:
Figure FDA0003275890650000011
wherein eta isFCIs the fuel cell system efficiency value;
Figure FDA0003275890650000021
the efficiency value of the fuel cell system at the last shutdown is obtained;
n is the number of the fuel cell stack monomers;
Figure FDA0003275890650000024
is the n-thiThe single voltage of the fuel cell stack;
Tfc_timerun time for the fuel cell system;
Ttimethe pass filtering is a multiple of 10;
wherein the fuel cell system efficiency value ηFCThe calculation is updated every 10 seconds and stored.
3. The method of claim 2, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
in the second step, the hydrogen residual mass
Figure FDA0003275890650000022
Comprises the following steps:
Figure FDA0003275890650000023
wherein, P0The initial pressure of the hydrogen cylinder;
t is the hydrogen cylinder temperature;
Plthe allowable cut-off pressure for the hydrogen cylinder;
Vtankis the volume of the hydrogen cylinder.
4. The method of claim 2, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
in the sixth step, the real-time energy consumption C of the whole vehiclevehicleComprises the following steps:
Figure FDA0003275890650000031
wherein, P0The initial pressure of the hydrogen cylinder;
t is the hydrogen cylinder temperature;
Vtankis the hydrogen cylinder volume;
Piis a hydrogen cylinder tiThe moment pressure;
Ub(t) is the voltage of the high voltage battery at time t;
Figure FDA0003275890650000032
the output current of the high-voltage battery at the moment t;
v (t) is the real-time speed of the fuel cell electric vehicle;
Tvehicle_timeis the operating time of the fuel cell electric vehicle;
CStandard_cyclethe energy consumption value is the energy consumption value of the fuel cell electric automobile under the standard working condition;
CKL15on/offrecording the whole vehicle energy consumption value when the fuel cell electric vehicle is powered off last time;
wherein, the real-time energy consumption of the whole vehicle CvehicleThe calculation is updated every 10 seconds and stored.
5. The method of claim 3, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
in the fourth step, the residual hydrogen is availableMeasurement of
Figure FDA0003275890650000034
Comprises the following steps:
Figure FDA0003275890650000033
6. the method of claim 5, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
in the fifth step, the residual energy E of the whole vehiclevehicleComprises the following steps:
Figure FDA0003275890650000042
wherein E isbatteryIs the remaining energy of the high-voltage battery.
7. The method of claim 6, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
in the seventh step, the driving mileage R of the whole vehiclevehicleComprises the following steps:
Figure FDA0003275890650000041
wherein E isvehicleIs the remaining energy of the entire vehicle, CvehicleAnd the energy consumption of the whole vehicle is real-time.
8. The method of claim 7, wherein the step of calculating the remaining driving range of the fuel cell vehicle,
step eight further comprises, determining whether the vehicle is powered down,
if the power is not off, turning to the step one;
and if the power is off, storing the energy consumption value of the whole vehicle recorded when the power is off and the efficiency value of the fuel cell system when the fuel cell system is shut down last time so as to directly read the energy consumption value of the whole vehicle after the fuel cell vehicle is powered on next time, and ending.
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