CN114312491B - Hydrogen fuel cell electric energy output control method and system for new energy automobile - Google Patents
Hydrogen fuel cell electric energy output control method and system for new energy automobile Download PDFInfo
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- CN114312491B CN114312491B CN202210049459.5A CN202210049459A CN114312491B CN 114312491 B CN114312491 B CN 114312491B CN 202210049459 A CN202210049459 A CN 202210049459A CN 114312491 B CN114312491 B CN 114312491B
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Abstract
The invention provides a hydrogen fuel cell electric energy output control method and a hydrogen fuel cell electric energy output control system for a new energy automobile, which determine whether a current running road section is a traffic jam road section or not by shooting and analyzing an external environment image of an automobile running process; when the automobile runs on a traffic jam road section at present, determining the highest allowable running speed of the automobile according to the distance between the automobile and the automobile in front of the automobile and the running speed of the automobile in front, and adjusting the electric energy output quantity of a hydrogen fuel cell of the automobile; and finally, determining the driving distance of the automobile according to the actual load information of the automobile, so as to adaptively prompt a driver to fill the automobile, and adjusting the series state of the internal hydrogen fuel cell to enable the hydrogen fuel cell to adaptively output different electric quantities through the actual driving environment and the actual load information of the new energy automobile, so that the electric energy output efficiency of the hydrogen fuel cell can be optimized and the driving mileage of the new energy automobile can be improved.
Description
Technical Field
The invention relates to the technical field of new energy batteries, in particular to a hydrogen fuel cell electric energy output control method and a hydrogen fuel cell electric energy output control system for a new energy automobile.
Background
The new energy automobile has received more and more attention due to the environmental protection characteristic, and the new energy automobile on the existing market mainly includes a lithium battery automobile which uses a lithium battery as a power source to drive a motor to operate, and a hydrogen fuel battery automobile which uses a hydrogen fuel battery as a power source to drive a motor to operate. The hydrogen fuel cell generates electric energy through hydrogen reaction, which requires adding hydrogen into the cell, and the hydrogen fuel cell generates water, which causes low environmental pollution, so the hydrogen fuel cell vehicle becomes a key development direction of new energy vehicles. How to adjust the electric energy output of the hydrogen fuel cell according to the actual running state of the automobile is very important in the running process of the hydrogen fuel cell automobile, which is directly related to optimizing the electric energy output efficiency of the hydrogen fuel cell and improving the running mileage of a new energy automobile.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a hydrogen fuel cell electric energy output control method and a hydrogen fuel cell electric energy output control system for a new energy automobile, wherein the method comprises the steps of shooting and analyzing an external environment image in the automobile driving process to determine whether the current driving road section is a traffic jam road section; when the automobile runs on a traffic jam road section at present, determining the highest allowable running speed of the automobile according to the distance between the automobile and the automobile in front of the automobile and the running speed of the automobile in front, and adjusting the electric energy output quantity of a hydrogen fuel cell of the automobile; and finally, determining the driving distance of the automobile according to the actual load information of the automobile, so as to prompt a driver to fill the automobile with gas for adaptability, and adjusting the series state of the internal hydrogen fuel cell through the actual driving environment and the actual load information of the new energy automobile so that the hydrogen fuel cell can adaptively output different electric quantities, thereby optimizing the electric energy output efficiency of the hydrogen fuel cell and improving the driving mileage of the new energy automobile.
The invention provides a hydrogen fuel cell electric energy output control method for a new energy automobile, which is characterized by comprising the following steps of:
s1, shooting an external environment of a new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image, and determining whether the current running road section of the new energy automobile belongs to a traffic jam road section;
s2, when the current running road section of the new energy automobile is determined to belong to a traffic jam road section, acquiring the distance between the new energy automobile and the front automobile and the running speed of the front automobile; determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; adjusting the electric energy output quantity of a hydrogen fuel cell of the new energy automobile according to the maximum allowable driving speed;
s3, determining the driving distance of the new energy automobile according to the current actual load information of the new energy automobile; judging whether the new energy automobile needs to be prompted to be aerated or not according to the travelable distance and the distance between the current destination and the destination of the new energy automobile;
further, in the step S1, an external environment of the new energy vehicle in the current driving process is photographed, so as to obtain an external environment image; analyzing the external environment image, and determining whether the current road section of the new energy automobile belongs to a traffic jam road section specifically comprises the following steps:
step S101, carrying out binocular shooting on an external environment of the new energy automobile in the current driving process so as to obtain a binocular image of the external environment;
step S102, obtaining a three-dimensional external environment image of the new energy automobile in the current driving process according to the external environment binocular image; identifying the number of automobiles in unit area on the road surface of the external environment from the three-dimensional external environment image;
step S103, comparing the number of the automobiles with a preset automobile number threshold value; if the number of the automobiles is larger than or equal to a preset automobile number threshold value, determining that the road section where the new energy automobile runs currently belongs to a traffic jam road section; otherwise, determining that the current running road section of the new energy automobile does not belong to the traffic jam road section;
further, in the step S2, when it is determined that the current road section on which the new energy vehicle runs belongs to a traffic jam road section, acquiring a distance between the new energy vehicle and a vehicle ahead and a running speed of the vehicle ahead; determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; and according to the maximum allowable driving speed, adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile specifically comprises the following steps:
step S201, when the current running road section of the new energy automobile is determined to belong to a traffic jam road section, indicating a laser distance measuring/speed measuring instrument positioned at the front end of the new energy automobile to acquire the distance between the new energy automobile and the front automobile and the running speed of the front automobile;
step S202, determining the maximum allowable driving speed of the new energy automobile by combining the distance and the driving speed according to the following formula (1),
in the above formula (1), V max Representing the maximum allowable driving speed of the new energy automobile; a represents the starting acceleration of the new energy automobile; l represents the distance between the new energy automobile and the front automobile; v 0 Representing the driving speed of the front automobile;
meanwhile, limiting the actual running speed of the new energy automobile to be less than or equal to the maximum allowable running speed;
step S203, determining the serial number N of the hydrogen fuel cells in the battery pack of the new energy automobile by using the following formula (2) and combining the maximum allowable driving speed,
in the above formula (2), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile, and the total weight is detected by a weight sensor arranged on a new energy automobile seat; m represents the weight of the new energy automobile; g represents the acceleration of gravity; I.C. A e Representing the rated current value of the new energy automobile; u shape 0 Represents the operating voltage of a single hydrogen fuel cell;
when the serial number N of the hydrogen fuel cells in the battery pack of the new energy automobile is determined, adjusting the serial mode of the hydrogen fuel cells in the battery pack inside the new energy automobile, so that the N hydrogen fuel cells can be connected in series together to supply power for the new energy automobile;
further, in the step S3, current actual load information of the new energy automobile is obtained, and a travelable distance of the new energy automobile is determined according to the actual load information; judging whether to prompt the new energy automobile to be aerated according to the distance between the travelable distance and the current destination of the new energy automobile specifically comprises the following steps:
step S301, detecting the total weight of people and goods carried by the new energy automobile through a weight sensor arranged on a new energy automobile seat to obtain the total weight as the actual load information; determining the travelable distance S of the new energy automobile by using the following formula (3),
in the above formula (3), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile; m represents the weight of the new energy automobile; g represents the gravitational acceleration; g represents the mass of hydrogen currently stored by all hydrogen fuel cells of the new energy automobile, and the unit of the mass is kilogram;
step S302, positioning the current position of the new energy automobile, and determining the distance between the current position and the destination of the new energy automobile; comparing the distance to be travelled with the distance between the current new energy automobile and the destination; and if the travelable distance is smaller than the distance between the current new energy automobile and the destination, generating prompt information for aerating the new energy automobile in a dial plate of the new energy automobile.
The invention also provides a hydrogen fuel cell electric energy output control system for the new energy automobile, which is characterized by comprising an automobile running environment shooting and analyzing module, an automobile distance measuring/speed measuring module, a hydrogen fuel cell electric energy output adjusting module and an automobile air-entrapping prompting module; wherein the content of the first and second substances,
the automobile driving environment shooting and analyzing module is used for shooting the external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image to determine whether the current running road section of the new energy automobile belongs to a traffic jam road section;
the automobile distance measurement/speed measurement module is used for acquiring the distance between the new energy automobile and the front automobile and the driving speed of the front automobile when the current driving road section of the new energy automobile is determined to belong to a traffic jam road section;
the hydrogen fuel cell electric energy output adjusting module is used for determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; adjusting the electric energy output quantity of a hydrogen fuel cell of the new energy automobile according to the maximum allowable driving speed;
the automobile air-entrapping prompting module is used for determining the travelable distance of the new energy automobile according to the current actual load information of the new energy automobile; judging whether the new energy automobile needs to be prompted to be aerated or not according to the distance between the travelable distance and the current destination of the new energy automobile;
further, the automobile driving environment shooting and analyzing module is used for shooting the external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image, and determining whether the current road section of the new energy automobile belongs to a traffic jam road section specifically comprises the following steps:
carrying out binocular shooting on the external environment of the new energy automobile in the current driving process so as to obtain binocular images of the external environment;
obtaining a three-dimensional external environment image of the new energy automobile in the current driving process according to the external environment binocular image; identifying the number of automobiles in a unit area on the road surface of the external environment from the three-dimensional external environment image;
comparing the number of the automobiles with a preset automobile number threshold value; if the number of the automobiles is larger than or equal to a preset automobile number threshold value, determining that the road section where the new energy automobile runs currently belongs to a traffic jam road section; otherwise, determining that the current running road section of the new energy automobile does not belong to the traffic jam road section;
further, the automobile distance measuring/speed measuring module is used for acquiring the distance between the new energy automobile and the automobile in front and the driving speed of the automobile in front when determining that the current driving road section of the new energy automobile belongs to a traffic jam road section, and specifically comprises:
when the current running road section of the new energy automobile is determined to belong to the traffic jam road section, indicating a laser distance measuring/speed measuring instrument positioned at the front end of the new energy automobile to acquire the distance between the new energy automobile and the front automobile and the running speed of the front automobile;
and the number of the first and second groups,
the hydrogen fuel cell electric energy output adjusting module is used for determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; and according to the maximum allowable driving speed, adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile specifically comprises the following steps:
determining the maximum allowable driving speed of the new energy automobile by combining the distance and the driving speed according to the following formula (1),
in the above formula (1), V max Representing the maximum allowable driving speed of the new energy automobile; a represents the starting acceleration of the new energy automobile; l represents the distance between the new energy automobile and the front automobile; v 0 Representing the running speed of the front automobile;
meanwhile, limiting the actual running speed of the new energy automobile to be less than or equal to the maximum allowable running speed;
determining the series number N of the hydrogen fuel cells in the battery pack of the new energy automobile by using the following formula (2) and combining the maximum allowable driving speed,
in the above formula (2), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile, and the total weight is detected by a weight sensor arranged on a new energy automobile seat; m represents the weight of the new energy automobile; g represents the acceleration of gravity; I.C. A e Representing the rated current value of the new energy automobile; u shape 0 Represents the operating voltage of a single hydrogen fuel cell;
when the serial number N of the hydrogen fuel cells in the battery pack of the new energy automobile is determined, adjusting the serial mode of the hydrogen fuel cells in the battery pack inside the new energy automobile, so that the N hydrogen fuel cells can be connected in series together to supply power for the new energy automobile;
further, the automobile air-entrapping prompting module is used for determining the travelable distance of the new energy automobile according to the current actual load information of the new energy automobile; judging whether to prompt the new energy automobile to be aerated according to the distance between the travelable distance and the current destination of the new energy automobile specifically comprises the following steps:
detecting and obtaining the total weight of people and goods carried by the new energy automobile through a weight sensor arranged on a new energy automobile seat, and taking the total weight as the actual load information; determining the travelable distance S of the new energy automobile by using the following formula (3),
in the above formula (3), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile; m represents the weight of the new energy automobile; g represents the gravitational acceleration; g represents the mass of hydrogen currently stored by all hydrogen fuel cells of the new energy automobile, and the unit of the mass is kilogram;
positioning the current position of the new energy automobile so as to determine the distance between the current position and the destination of the new energy automobile; comparing the distance between the travelable distance and the current distance between the new energy automobile and the destination; and if the travelable distance is smaller than the distance between the current new energy automobile and the destination, generating prompt information for aerating the new energy automobile in a dial plate of the new energy automobile.
Compared with the prior art, the hydrogen fuel cell power output control method and the system for the new energy automobile determine whether a current running road section is a traffic jam road section or not by shooting and analyzing an external environment image of the automobile running process; when the automobile runs on a traffic jam road section at present, determining the highest allowable running speed of the automobile according to the distance between the automobile and the automobile in front of the automobile and the running speed of the automobile in front, and adjusting the electric energy output quantity of a hydrogen fuel cell of the automobile; and finally, determining the driving distance of the automobile according to the actual load information of the automobile, so as to adaptively prompt a driver to fill the automobile, and adjusting the series state of the internal hydrogen fuel cell to enable the hydrogen fuel cell to adaptively output different electric quantities through the actual driving environment and the actual load information of the new energy automobile, so that the electric energy output efficiency of the hydrogen fuel cell can be optimized and the driving mileage of the new energy automobile can be improved.
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 claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for controlling the electric energy output of a hydrogen fuel cell for a new energy automobile according to the present invention.
Fig. 2 is a schematic structural diagram of a hydrogen fuel cell power output control system for a new energy automobile according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1, a schematic flow chart of a method for controlling electrical energy output of a hydrogen fuel cell for a new energy vehicle according to an embodiment of the present invention is shown. The hydrogen fuel cell power output control method for the new energy automobile comprises the following steps:
s1, shooting an external environment of a new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image to determine whether the current running road section of the new energy automobile belongs to a traffic jam road section;
s2, when the current running road section of the new energy automobile is determined to belong to the traffic jam road section, acquiring the distance between the new energy automobile and the front automobile and the running speed of the front automobile; determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile according to the maximum allowable driving speed;
s3, determining the driving distance of the new energy automobile according to the current actual load information of the new energy automobile; and judging whether the new energy automobile needs to be prompted to be aerated or not according to the travelable distance and the distance between the current destination and the destination of the new energy automobile.
The beneficial effects of the above technical scheme are: the hydrogen fuel cell power output control method for the new energy automobile determines whether a current running road section is a traffic jam road section or not by shooting and analyzing an external environment image of the automobile in the running process; when the automobile runs on a traffic jam road section at present, determining the highest allowable running speed of the automobile according to the distance between the automobile and the automobile in front of the automobile and the running speed of the automobile in front, and adjusting the electric energy output quantity of a hydrogen fuel cell of the automobile; and finally, determining the driving distance of the automobile according to the actual load information of the automobile, so as to adaptively prompt a driver to fill the automobile, and adjusting the series state of the internal hydrogen fuel cell to enable the hydrogen fuel cell to adaptively output different electric quantities through the actual driving environment and the actual load information of the new energy automobile, so that the electric energy output efficiency of the hydrogen fuel cell can be optimized and the driving mileage of the new energy automobile can be improved.
Preferably, in the step S1, an external environment of the new energy vehicle in the current driving process is photographed, so as to obtain an external environment image; analyzing the external environment image, and determining whether the current road section of the new energy automobile is a traffic jam road section specifically comprises the following steps:
step S101, carrying out binocular shooting on an external environment of the new energy automobile in the current driving process so as to obtain a binocular image of the external environment;
step S102, obtaining a three-dimensional external environment image of the new energy automobile in the current driving process according to the external environment binocular image; identifying the number of automobiles in a unit area on the road surface of the external environment from the three-dimensional external environment image;
step S103, comparing the number of the automobiles with a preset automobile number threshold value; if the number of the vehicles is larger than or equal to a preset vehicle number threshold value, determining that the road section where the new energy vehicle runs currently belongs to a traffic jam road section; otherwise, determining that the current running road section of the new energy automobile does not belong to the traffic jam road section.
The beneficial effects of the above technical scheme are: if the new energy automobile runs on a traffic jam road section, the new energy automobile can be in an intermittent moving state in the running process, at the moment, the motor of the new energy automobile cannot perform stable power output, and accordingly, the hydrogen fuel cell in the new energy automobile needs to output larger electric quantity to the motor to maintain the normal operation of the motor. In order to adjust the electric quantity output state of the hydrogen fuel cell in the new energy automobile in time, image shooting and analysis need to be carried out on the external environment of the new energy automobile currently running. In actual operation, binocular shooting is carried out on the external environment of the new energy automobile in the current driving process through the binocular camera arranged on the new energy automobile, and then corresponding three-dimensional external environment images are generated through calculating image parallax of binocular images of the external environment obtained through shooting. And then, the number of automobiles in unit area on the road surface of the external environment is identified from the three-dimensional external environment image by utilizing an automobile outline identification mode, and whether the current running road section of the new energy automobile belongs to the traffic jam road section or not can be quantitatively judged by combining a threshold value comparison mode.
Preferably, in the step S2, when it is determined that the current road segment where the new energy automobile runs belongs to the traffic jam road segment, the distance between the new energy automobile and the automobile in front and the running speed of the automobile in front are collected; determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; and according to the maximum allowable driving speed, adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile specifically comprises the following steps:
step S201, when the current running road section of the new energy automobile is determined to belong to a traffic jam road section, indicating a laser distance measuring/speed measuring instrument positioned at the front end of the new energy automobile to acquire the distance between the new energy automobile and the front automobile and the running speed of the front automobile;
step S202, combining the distance and the running speed to determine the maximum allowable running speed of the new energy automobile by using the following formula (1),
in the above formula (1), V max Representing the maximum allowable driving speed of the new energy automobile; a represents the starting acceleration of the new energy automobile; l represents the distance between the new energy automobile and the front automobile; v 0 Representing the driving speed of the front automobile;
meanwhile, limiting the actual running speed of the new energy automobile to be less than or equal to the maximum allowable running speed;
step S203, determining the serial number N of the hydrogen fuel cells in the battery pack of the new energy automobile by using the following formula (2) and combining the maximum allowable driving speed,
in the above formula (2), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile, and the total weight is detected by a weight sensor arranged on a new energy automobile seat; m represents the weight of the new energy automobile; g represents the gravitational acceleration; I.C. A e Representing the rated current value of the new energy automobile; u shape 0 Represents the operating voltage of a single hydrogen fuel cell;
when the series number N of the hydrogen fuel cells in the battery pack of the new energy automobile is determined, the series connection mode of the hydrogen fuel cells in the battery pack inside the new energy automobile is adjusted, and therefore the N hydrogen fuel cells can be connected in series together to supply power to the new energy automobile.
The beneficial effects of the above technical scheme are: when the current driving road section of the new energy automobile belongs to a traffic jam road section, in order to ensure the driving safety of the new energy automobile and avoid collision with the front automobile, the driving speed of the front automobile and the distance between the new energy automobile and the front automobile need to be detected in real time, in actual operation, a laser distance measuring/speed measuring instrument can be installed at the front end of the new energy automobile to detect the front automobile, so that the driving speed of the front automobile and the distance between the new energy automobile and the front automobile can be obtained in real time, the distance measuring/speed measuring process of the laser distance measuring/speed measuring instrument belongs to the conventional measuring process in the field, and detailed description is not repeated here. By utilizing the formula (1), the maximum allowable driving speed of the new energy automobile can be obtained according to the driving speed of the front automobile and the distance between the new energy automobile and the front automobile which are obtained through real-time measurement, and as long as the actual driving speed of the new energy automobile is limited below the maximum allowable driving speed, the new energy automobile can always keep a safe driving distance with the front automobile, so that the probability of accidents of the new energy automobile in the driving process can be greatly reduced. Further, the total number of series-connected hydrogen fuel cells in the stack of the new energy vehicle is determined using the above equation (2) in combination with the maximum allowable travel speed. The new energy automobile generally comprises a plurality of single hydrogen fuel cells, different battery packs can be formed by connecting different numbers of hydrogen fuel cells in series in the operation process of the new energy automobile, and when the number of the hydrogen fuel cells connected in series is larger, the electric quantity output by the corresponding battery pack is also larger. The series number N of the hydrogen fuel cells in the battery pack of the new energy automobile obtained by the formula (2) is formed into the battery pack based on the series number N, and when the electric energy is output to the motor, the maximum driving speed of the new energy automobile can be ensured not to exceed the maximum allowable driving speed, so that the driving safety of the new energy automobile is ensured.
Preferably, in the step S3, current actual load information of the new energy automobile is obtained, and the travelable distance of the new energy automobile is determined according to the actual load information; judging whether to prompt the new energy automobile to be aerated according to the distance between the travelable distance and the current destination of the new energy automobile specifically comprises the following steps:
step S301, detecting the total weight of people and goods carried by the new energy automobile through a weight sensor arranged on a new energy automobile seat to obtain the total weight as the actual load information; determining the travelable distance S of the new energy automobile by using the following formula (3),
in the above formula (3), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile; m represents the weight of the new energy automobile; g represents the gravitational acceleration; g represents the mass of hydrogen currently stored by all hydrogen fuel cells of the new energy automobile, and the unit of the mass is kilogram;
step S302, positioning the current position of the new energy automobile, and determining the distance between the current position and the destination of the new energy automobile; comparing the distance to the distance between the current new energy automobile and the destination; and if the travelable distance is smaller than the distance between the current new energy automobile and the destination, generating prompt information for aerating the new energy automobile in a dial plate of the new energy automobile.
The beneficial effects of the above technical scheme are: when the weight of people and/or goods carried by the new energy automobile is larger, the speed of electric quantity consumed by the hydrogen fuel cell in the new energy automobile is higher, and the travelable distance of the new energy automobile driven by the hydrogen fuel cell in the current load state can be quickly obtained by combining the total weight of the people and the goods carried by the new energy automobile and the formula (3). And determining whether a driver needs to be prompted to add gas into the new energy automobile or not by combining a threshold comparison mode, so that the continuous and stable running of the new energy automobile is effectively ensured.
Fig. 2 is a schematic structural diagram of a hydrogen fuel cell power output control system for a new energy vehicle according to an embodiment of the present invention. The hydrogen fuel cell power output control system for the new energy automobile comprises an automobile driving environment shooting and analyzing module, an automobile distance measuring/speed measuring module, a hydrogen fuel cell power output adjusting module and an automobile air-entrapping prompting module; wherein the content of the first and second substances,
the automobile driving environment shooting and analyzing module is used for shooting the external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image to determine whether the current running road section of the new energy automobile belongs to a traffic jam road section;
the automobile distance measurement/speed measurement module is used for acquiring the distance between the new energy automobile and the front automobile and the driving speed of the front automobile when the current driving road section of the new energy automobile is determined to belong to the traffic jam road section;
the hydrogen fuel cell electric energy output adjusting module is used for determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile according to the maximum allowable driving speed;
the automobile air-entrapping prompt module is used for determining the travelable distance of the new energy automobile according to the current actual load information of the new energy automobile; and judging whether the new energy automobile needs to be prompted to be aerated or not according to the travelable distance and the distance between the current destination and the destination of the new energy automobile.
The beneficial effects of the above technical scheme are: the hydrogen fuel cell electric energy output control system for the new energy automobile determines whether a current running road section is a traffic jam road section or not by shooting and analyzing an external environment image of the automobile running process; when the automobile runs on a traffic jam road section at present, determining the highest allowable running speed of the automobile according to the distance between the automobile and the automobile in front of the automobile and the running speed of the automobile in front, and adjusting the electric energy output quantity of a hydrogen fuel cell of the automobile; and finally, determining the driving distance of the automobile according to the actual load information of the automobile, so as to adaptively prompt a driver to fill the automobile, and adjusting the series state of the internal hydrogen fuel cell to enable the hydrogen fuel cell to adaptively output different electric quantities through the actual driving environment and the actual load information of the new energy automobile, so that the electric energy output efficiency of the hydrogen fuel cell can be optimized and the driving mileage of the new energy automobile can be improved.
Preferably, the automobile driving environment shooting and analyzing module is used for shooting an external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image, and determining whether the current road section of the new energy automobile is a traffic jam road section specifically comprises the following steps:
carrying out binocular shooting on the external environment of the new energy automobile in the current driving process so as to obtain binocular images of the external environment;
obtaining a three-dimensional external environment image of the new energy automobile in the current driving process according to the external environment binocular image; identifying the number of automobiles in a unit area on the road surface of the external environment from the three-dimensional external environment image;
comparing the number of the automobiles with a preset automobile number threshold value; if the number of the vehicles is larger than or equal to a preset vehicle number threshold value, determining that the road section where the new energy vehicle runs currently belongs to a traffic jam road section; otherwise, determining that the current running road section of the new energy automobile does not belong to the traffic jam road section.
The beneficial effects of the above technical scheme are: if the new energy automobile runs on a traffic jam road section, the new energy automobile can be in an intermittent moving state in the running process, at the moment, the motor of the new energy automobile cannot perform stable power output, and accordingly, the hydrogen fuel cell in the new energy automobile needs to output larger electric quantity to the motor to maintain the normal operation of the motor. In order to adjust the electric quantity output state of the hydrogen fuel cell in the new energy automobile in time, image shooting and analysis of the current running external environment of the new energy automobile are required. In actual operation, binocular shooting is carried out on the external environment of the new energy automobile in the current driving process through the binocular camera arranged on the new energy automobile, and then corresponding three-dimensional external environment images are generated through calculating image parallax of binocular images of the external environment obtained through shooting. And then identifying the number of automobiles in a unit area on the road surface of the external environment from the three-dimensional external environment image by using an automobile outline identification mode, and quantitatively judging whether the current running road section of the new energy automobile belongs to the traffic jam road section or not by combining a threshold comparison mode.
Preferably, the automobile distance measuring/speed measuring module is configured to, when it is determined that the current road segment where the new energy automobile runs belongs to the traffic jam road segment, specifically, acquire the distance between the new energy automobile and the automobile in front and the running speed of the automobile in front includes:
when the current running road section of the new energy automobile is determined to belong to the traffic jam road section, indicating a laser distance/speed meter positioned at the front end of the new energy automobile to acquire the distance between the new energy automobile and the front automobile and the running speed of the front automobile;
and (c) a second step of,
the hydrogen fuel cell electric energy output adjusting module is used for determining the highest allowable driving speed of the new energy automobile according to the distance and the driving speed; and according to the maximum allowable driving speed, adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile specifically comprises the following steps:
determining the maximum allowable driving speed of the new energy automobile by combining the distance and the driving speed according to the following formula (1),
in the above formula (1), V max Representing the maximum allowable driving speed of the new energy automobile; a represents the starting acceleration of the new energy automobile; l represents the distance between the new energy automobile and the front automobile; v 0 Representing the running speed of the front automobile;
meanwhile, limiting the actual running speed of the new energy automobile to be less than or equal to the maximum allowable running speed;
determining the serial number N of the hydrogen fuel cells in the battery pack of the new energy automobile by using the following formula (2) and combining the maximum allowable driving speed,
in the above formula (2), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile, and the total weight is detected by a weight sensor arranged on a new energy automobile seat; m represents the weight of the new energy automobile; g represents the gravitational acceleration; I.C. A e Representing the rated current value of the new energy automobile; u shape 0 Represents the operating voltage of a single hydrogen fuel cell;
when the series number N of the hydrogen fuel cells in the battery pack of the new energy automobile is determined, the series connection mode of the hydrogen fuel cells in the battery pack inside the new energy automobile is adjusted, so that the N hydrogen fuel cells can be connected in series together to supply power for the new energy automobile.
The beneficial effects of the above technical scheme are: when the current driving road section of the new energy automobile belongs to a traffic jam road section, in order to ensure the driving safety of the new energy automobile and avoid collision with the front automobile, the driving speed of the front automobile and the distance between the new energy automobile and the front automobile need to be detected in real time, in actual operation, a laser distance measuring/speed measuring instrument can be installed at the front end of the new energy automobile to detect the front automobile, so that the driving speed of the front automobile and the distance between the new energy automobile and the front automobile can be obtained in real time, the distance measuring/speed measuring process of the laser distance measuring/speed measuring instrument belongs to the conventional measuring process in the field, and detailed description is not repeated here. By utilizing the formula (1), the maximum allowable running speed of the new energy automobile can be obtained according to the running speed of the front automobile and the distance between the new energy automobile and the front automobile which are obtained through real-time measurement, and as long as the actual running speed of the new energy automobile is limited below the maximum allowable running speed, the new energy automobile can always keep a safe running distance with the front automobile, so that the probability of accidents of the new energy automobile in the running process can be greatly reduced. Further, the total number of hydrogen fuel cells connected in series in the stack of the new energy vehicle is determined using the above formula (2) in combination with the maximum allowable traveling speed. The new energy automobile generally comprises a plurality of single hydrogen fuel cells, different battery packs can be formed by connecting different numbers of hydrogen fuel cells in series in the operation process of the new energy automobile, and when the number of the hydrogen fuel cells connected in series is larger, the electric quantity output by the corresponding battery pack is also larger. The series number N of the hydrogen fuel cells in the battery pack of the new energy automobile obtained by the formula (2) forms the battery pack based on the series number N, and when the battery pack outputs electric energy to the motor, the maximum driving speed of the new energy automobile can be ensured not to exceed the maximum allowable driving speed, so that the driving safety of the new energy automobile is ensured.
Preferably, the automobile air-entrapping prompting module is used for determining the travelable distance of the new energy automobile according to the current actual load information of the new energy automobile; judging whether to prompt the new energy automobile to be aerated according to the distance between the travelable distance and the current destination of the new energy automobile specifically comprises the following steps:
detecting the total weight of people and goods carried by the new energy automobile through a weight sensor arranged on a new energy automobile seat to obtain the total weight as the actual load information; determining the travelable distance S of the new energy automobile by using the following formula (3),
in the above formula (3), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile; m represents the weight of the new energy automobile; g represents the acceleration of gravity; g represents the mass of hydrogen currently stored by all hydrogen fuel cells of the new energy automobile, and the unit of the mass is kilogram;
positioning the current position of the new energy automobile so as to determine the distance between the current position and the destination of the new energy automobile; comparing the distance to the distance between the current new energy automobile and the destination; and if the travelable distance is smaller than the distance between the current new energy automobile and the destination, generating prompt information for aerating the new energy automobile in a dial plate of the new energy automobile.
The beneficial effects of the above technical scheme are: when the weight of people and/or goods carried by the new energy automobile is larger, the speed of electric quantity consumed products of the hydrogen fuel cell in the new energy automobile is higher, and the running distance of the new energy automobile driven by the hydrogen fuel cell under the current load state can be quickly obtained by utilizing the formula (3) and combining the total weight of the people and the goods carried by the new energy automobile. And determining whether a driver needs to be prompted to add gas to the new energy automobile or not by combining a threshold comparison mode, so that the continuous and stable running of the new energy automobile is effectively ensured.
As can be seen from the content of the above embodiment, the hydrogen fuel cell power output control method and system based on the new energy automobile determines whether the current road section is a traffic jam road section by shooting and analyzing the external environment image of the automobile in the driving process; when the automobile runs on a traffic jam road section at present, determining the highest allowable running speed of the automobile according to the distance between the automobile and the automobile in front of the automobile and the running speed of the automobile in front, and adjusting the electric energy output quantity of a hydrogen fuel cell of the automobile; and finally, determining the driving distance of the automobile according to the actual load information of the automobile, so as to adaptively prompt a driver to fill the automobile, and adjusting the series state of the internal hydrogen fuel cell to enable the hydrogen fuel cell to adaptively output different electric quantities through the actual driving environment and the actual load information of the new energy automobile, so that the electric energy output efficiency of the hydrogen fuel cell can be optimized and the driving mileage of the new energy automobile can be improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The electric energy output control method of the hydrogen fuel cell for the new energy automobile is characterized by comprising the following steps of:
s1, shooting an external environment of a new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image to determine whether the current running road section of the new energy automobile belongs to a traffic jam road section;
s2, when the current running road section of the new energy automobile is determined to belong to a traffic jam road section, acquiring the distance between the new energy automobile and the front automobile and the running speed of the front automobile; determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; adjusting the electric energy output quantity of a hydrogen fuel cell of the new energy automobile according to the maximum allowable driving speed;
s3, determining the driving distance of the new energy automobile according to the current actual load information of the new energy automobile; and judging whether the new energy automobile needs to be prompted to be aerated or not according to the distance between the travelable distance and the current destination of the new energy automobile.
2. The power output control method of a hydrogen fuel cell for a new energy automobile according to claim 1, characterized in that:
in the step S1, shooting an external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image, and determining whether the current road section of the new energy automobile belongs to a traffic jam road section specifically comprises the following steps:
step S101, carrying out binocular shooting on an external environment of the new energy automobile in the current driving process so as to obtain a binocular image of the external environment;
step S102, obtaining a three-dimensional external environment image of the new energy automobile in the current driving process according to the external environment binocular image; identifying the number of automobiles in a unit area on the road surface of the external environment from the three-dimensional external environment image;
step S103, comparing the number of the automobiles with a preset automobile number threshold value; if the number of the vehicles is larger than or equal to a preset vehicle number threshold value, determining that the road section where the new energy vehicle runs currently belongs to a traffic jam road section; otherwise, determining that the current running road section of the new energy automobile does not belong to the traffic jam road section.
3. The electric power output control method of a hydrogen fuel cell for a new energy automobile according to claim 1, characterized in that:
in the step S2, when it is determined that the current road section on which the new energy automobile runs belongs to a traffic jam road section, acquiring a distance between the new energy automobile and a front automobile and a running speed of the front automobile; determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; and according to the maximum allowable driving speed, adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile specifically comprises the following steps:
step S201, when the current running road section of the new energy automobile is determined to belong to a traffic jam road section, indicating a laser distance measuring/speed measuring instrument positioned at the front end of the new energy automobile to acquire the distance between the new energy automobile and the front automobile and the running speed of the front automobile;
step S202, determining the maximum allowable driving speed of the new energy automobile by combining the distance and the driving speed according to the following formula (1),
in the above formula (1), V max Representing the maximum allowable driving speed of the new energy automobile; a represents the starting acceleration of the new energy automobile; l represents the distance between the new energy automobile and the front automobile; v 0 Representing the driving speed of the front automobile;
meanwhile, limiting the actual running speed of the new energy automobile to be less than or equal to the maximum allowable running speed;
step S203, determining the serial number N of the hydrogen fuel cells in the battery pack of the new energy automobile by using the following formula (2) and combining the maximum allowable driving speed,
in the above formula (2), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile, and the total weight is detected by a weight sensor arranged on a new energy automobile seat; m represents the weight of the new energy automobile; g represents the acceleration of gravity; i is e Representing the rated current value of the new energy automobile; u shape 0 Represents the operating voltage of a single hydrogen fuel cell;
when the series number N of the hydrogen fuel cells in the battery pack of the new energy automobile is determined, the series connection mode of the hydrogen fuel cells in the battery pack inside the new energy automobile is adjusted, and therefore the N hydrogen fuel cells can be connected in series together to supply power to the new energy automobile.
4. The power output control method of a hydrogen fuel cell for a new energy automobile according to claim 1, characterized in that:
in the step S3, current actual load information of the new energy automobile is obtained, and a distance to which the new energy automobile can travel is determined according to the actual load information; judging whether to prompt the new energy automobile to be aerated according to the distance between the travelable distance and the current destination of the new energy automobile specifically comprises the following steps:
step S301, detecting the total weight of people and goods carried by the new energy automobile through a weight sensor arranged on a new energy automobile seat to obtain the total weight as the actual load information; determining the travelable distance S of the new energy automobile by using the following formula (3),
in the above formula (3), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile; m represents the weight of the new energy automobile; g represents the gravitational acceleration; g represents the mass of hydrogen currently stored by all hydrogen fuel cells of the new energy automobile, and the unit of the mass is kilogram;
step S302, positioning the current position of the new energy automobile, and determining the distance between the current position and the destination of the new energy automobile; comparing the distance to be travelled with the distance between the current new energy automobile and the destination; and if the travelable distance is smaller than the distance between the current new energy automobile and the destination, generating prompt information for aerating the new energy automobile in a dial plate of the new energy automobile.
5. The hydrogen fuel cell electric energy output control system for the new energy automobile is characterized by comprising an automobile driving environment shooting and analyzing module, an automobile distance measuring/speed measuring module, a hydrogen fuel cell electric energy output adjusting module and an automobile gas filling prompting module; wherein the content of the first and second substances,
the automobile driving environment shooting and analyzing module is used for shooting the external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image to determine whether the current running road section of the new energy automobile belongs to a traffic jam road section;
the automobile distance measuring/speed measuring module is used for acquiring the distance between the new energy automobile and the front automobile and the driving speed of the front automobile when the current driving road section of the new energy automobile is determined to belong to a traffic jam road section;
the hydrogen fuel cell electric energy output adjusting module is used for determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; adjusting the electric energy output quantity of a hydrogen fuel cell of the new energy automobile according to the maximum allowable driving speed;
the automobile air entrainment prompting module is used for determining the travelable distance of the new energy automobile according to the current actual load information of the new energy automobile; and judging whether the new energy automobile needs to be prompted to be aerated or not according to the travelable distance and the distance between the current destination and the destination of the new energy automobile.
6. The hydrogen fuel cell power output control system for a new energy automobile according to claim 5, characterized in that:
the automobile driving environment shooting and analyzing module is used for shooting the external environment of the new energy automobile in the current driving process so as to obtain an external environment image; analyzing the external environment image, and determining whether the current road section of the new energy automobile belongs to a traffic jam road section specifically comprises the following steps:
carrying out binocular shooting on the external environment of the new energy automobile in the current running process so as to obtain external environment binocular images;
obtaining a three-dimensional external environment image of the new energy automobile in the current driving process according to the external environment binocular image; identifying the number of automobiles in unit area on the road surface of the external environment from the three-dimensional external environment image;
comparing the number of the automobiles with a preset automobile number threshold value; if the number of the vehicles is larger than or equal to a preset vehicle number threshold value, determining that the road section where the new energy vehicle runs currently belongs to a traffic jam road section; otherwise, determining that the current running road section of the new energy automobile does not belong to the traffic jam road section.
7. The hydrogen fuel cell electric power output control system for a new energy automobile according to claim 5, characterized in that:
the automobile distance measurement/speed measurement module is used for acquiring the distance between the new energy automobile and the automobile in front and the running speed of the automobile in front when determining that the current running road section of the new energy automobile belongs to a traffic jam road section, and specifically comprises the following steps:
when the current running road section of the new energy automobile is determined to belong to the traffic jam road section, indicating a laser distance/speed meter positioned at the front end of the new energy automobile to acquire the distance between the new energy automobile and the front automobile and the running speed of the front automobile;
and the number of the first and second groups,
the hydrogen fuel cell electric energy output adjusting module is used for determining the maximum allowable driving speed of the new energy automobile according to the distance and the driving speed; and according to the maximum allowable driving speed, adjusting the electric energy output quantity of the hydrogen fuel cell of the new energy automobile specifically comprises the following steps:
determining the maximum allowable driving speed of the new energy automobile by combining the distance and the driving speed by using the following formula (1),
in the above formula (1), V max Representing the maximum allowable driving speed of the new energy automobile; a represents the starting acceleration of the new energy automobile; l represents the distance between the new energy automobile and the front automobile; v 0 Representing the driving speed of the front automobile;
meanwhile, limiting the actual running speed of the new energy automobile to be less than or equal to the maximum allowable running speed;
determining the number N of the hydrogen fuel cells in series in the battery pack of the new energy automobile by using the following formula (2) in combination with the maximum allowable driving speed,
in the above formula (2), μ represents a friction coefficient between a tire of the new energy automobile and the ground; m represents the total weight of people and goods carried by the new energy automobile, and the total weight is detected by a weight sensor arranged on a new energy automobile seat; m represents the weight of the new energy automobile; g represents the gravitational acceleration; i is e Representing the rated current value of the new energy automobile; u shape 0 Represents the operating voltage of a single hydrogen fuel cell;
when the series number N of the hydrogen fuel cells in the battery pack of the new energy automobile is determined, the series connection mode of the hydrogen fuel cells in the battery pack inside the new energy automobile is adjusted, and therefore the N hydrogen fuel cells can be connected in series together to supply power to the new energy automobile.
8. The hydrogen fuel cell electric power output control system for a new energy automobile according to claim 5, characterized in that:
the automobile air entrainment prompting module is used for determining the travelable distance of the new energy automobile according to the current actual load information of the new energy automobile; judging whether the new energy automobile needs to be prompted to be aerated according to the distance between the travelable distance and the current destination of the new energy automobile specifically comprises the following steps: detecting and obtaining the total weight of people and goods carried by the new energy automobile through a weight sensor arranged on a new energy automobile seat, and taking the total weight as the actual load information; determining the travelable distance S of the new energy automobile by using the following formula (3),
in the above formula (3), μ represents a friction coefficient between a tire of the new energy vehicle and the ground; m represents the total weight of people and goods carried by the new energy automobile; m represents the weight of the new energy automobile; g represents the gravitational acceleration; g represents the mass of hydrogen currently stored by all hydrogen fuel cells of the new energy automobile, and the unit of the mass is kilogram;
positioning the current position of the new energy automobile so as to determine the distance between the current position and the destination of the new energy automobile; comparing the distance to be travelled with the distance between the current new energy automobile and the destination; and if the travelable distance is smaller than the distance between the current new energy automobile and the destination, generating prompt information for aerating the new energy automobile in a dial plate of the new energy automobile.
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