A vehicle range test method and system

Abstract

The embodiment of the application relates to the technical field of new energy vehicles, and in particular relates to a vehicle endurance test method and system. The vehicle endurance test method comprises: controlling a vehicle to run according to a preset test condition; obtaining a real-time power consumption of the vehicle during vehicle running; calculating a first difference between the real-time power consumption and a reference power consumption; determining whether the first difference exceeds a first error threshold; if yes, terminating the vehicle endurance test; if no, determining whether a real-time vehicle speed of the vehicle is lower than a preset minimum vehicle speed; if yes, controlling the vehicle to stop running, determining a real-time running distance of the vehicle according to the real-time vehicle speed; and determining a vehicle endurance according to the real-time power consumption and the real-time running distance. Thus, the effectiveness of test data is improved, and test time is saved.

Description

[0001] The embodiment of the application relates to the technical field of new energy vehicles, in particular to a vehicle endurance test method and system.

[0002] With a series of policies such as emission restrictions on traditional fuel vehicles and encouragement of new energy vehicle development, domestic new energy vehicles have entered a rapid development stage. New energy vehicles are becoming more and more popular, and their endurance performance has become an important standard for people to choose new energy vehicles.

[0003] In the prior art, to evaluate the endurance of new energy vehicles, a cycle test method is generally used. In the test process, the driving distance and power change corresponding to different vehicle speed sections are obtained, so as to realize fine analysis of the endurance of new energy vehicles or estimate the overall endurance of the vehicle according to the distance and power change of different vehicle speed sections.

[0004] The problem that follows is that in the test process, measurement deviation caused by test tool or equipment error cannot be avoided. Moreover, the above measurement deviation can be found only when data analysis is performed after the test is completed, thereby easily causing waste of test resources and reducing test efficiency.

[0005] The embodiment of the application provides a vehicle endurance test method and system

[0006] In a first aspect, the embodiment of the application provides a vehicle endurance test method, comprising:

[0007] controlling vehicle operation according to a preset test condition;

[0008] acquiring real-time power consumption of the vehicle during vehicle operation;

[0009] calculating a first difference between the real-time power consumption and reference power consumption;

[0010] judging whether the first difference exceeds a first error threshold;

[0011] if yes, terminating the vehicle endurance test;

[0012] if no, judging whether real-time vehicle speed of the vehicle is lower than a preset minimum vehicle speed;

[0013] if yes, controlling the vehicle to stop operation and determining real-time driving distance of the vehicle according to the real-time vehicle speed;

[0014] determining vehicle endurance according to the real-time power consumption and the real-time driving distance.

[0015] ​​​In one possible implementation, the host computer is communicatively connected with the chassis dynamometer, the electric metering acquisition device, and the vehicle-mounted bus data acquisition device.

[0016] Before controlling the vehicle to run according to the preset test working condition, the method further includes:

[0017] charging the vehicle according to a preset program;

[0018] After the charging is completed, controlling the vehicle to run on the chassis dynamometer according to the preset test working condition to obtain real-time power consumption and real-time vehicle speed of the vehicle.

[0019] In one possible implementation, the obtaining the real-time power consumption of the vehicle includes:

[0020] obtaining real-time voltage and real-time current of the vehicle chargeable energy storage device collected by the electric metering acquisition device; the vehicle chargeable energy storage device includes a power storage battery and a low-voltage storage battery;

[0021] determining the real-time power consumption according to the real-time voltage and the real-time current.

[0022] In one possible implementation, the calculating the first difference between the real-time power consumption and the reference power consumption includes:

[0023] obtaining reference voltage and reference current of the vehicle chargeable energy storage device collected by the vehicle-mounted bus data acquisition device in real time during running of the vehicle;

[0024] determining the reference power consumption according to the reference voltage and the reference current;

[0025] determining the first difference according to the reference power consumption and the real-time power consumption.

[0026] In one possible implementation, the terminating the vehicle range test includes:

[0027] controlling the vehicle to stop running;

[0028] generating a first data record file; the first data record file includes real-time voltage, real-time current, real-time power consumption, and corresponding reference voltage, reference current, and reference power consumption at the same time during the test.

[0029] In one possible implementation, before determining whether the real-time vehicle speed is lower than the preset minimum vehicle speed, the method further includes:

[0030] synchronously obtaining reference vehicle speed collected by the vehicle-mounted bus data acquisition device;

[0031] calculating a second difference between the real-time vehicle speed and the reference vehicle speed.

[0032] determining whether the second difference exceeds a second error threshold;

[0033] if the second difference exceeds the second error threshold, terminating the vehicle range test;

[0034] if the second difference does not exceed the second error threshold, determining whether the real-time vehicle speed is lower than a preset minimum vehicle speed.

[0035] In one possible implementation, the determining whether the real-time vehicle speed is lower than the preset minimum vehicle speed further includes:

[0036] if the real-time vehicle speed is not lower than the preset minimum vehicle speed, continuing to control the vehicle to run according to the preset test condition until the real-time vehicle speed is lower than the preset minimum vehicle speed.

[0037] In a second aspect, an embodiment of the present application provides a vehicle range test system, comprising a chassis dynamometer, an electric metering acquisition device, an on-board bus data acquisition device, and an upper computer.

[0038] The chassis dynamometer is configured to provide a real-time vehicle speed of a vehicle for the upper computer.

[0039] The electric metering acquisition device is configured to provide a real-time power consumption of the vehicle for the upper computer.

[0040] The on-board bus data acquisition device is configured to provide a reference power consumption for the upper computer.

[0041] The upper computer is in communication connection with the chassis dynamometer, the electric metering acquisition device, and the on-board bus data acquisition device respectively, and is configured to execute the method of any one of the first aspect.

[0042] In one possible implementation, the electric metering acquisition device is further configured to provide a real-time voltage and a real-time current of a chargeable energy storage device of the vehicle for the upper computer, and the chargeable energy storage device comprises a power storage battery and a low-voltage storage battery.

[0043] The on-board bus data acquisition device is further configured to provide a reference voltage and a reference current of the chargeable energy storage device of the vehicle for the upper computer, and to provide a reference vehicle speed of the vehicle for the upper computer.

[0044] The vehicle driving range test method and system provided by the embodiment of the present application can effectively avoid the problem of inaccurate test results caused by measurement deviation by providing reference for real-time current, real-time voltage and real-time vehicle speed obtained during the test process in combination with the data collected by the second current sensor, the second voltage sensor and the second vehicle speed sensor built in the vehicle. Meanwhile, the host computer can detect and analyze the above measurement deviation in real time during the test process, and if the measurement deviation exceeds the preset error threshold, the vehicle driving range test is immediately terminated. Thus, the technical problem that the measurement deviation can be found only when data analysis is performed after the test is completed is solved, and the test efficiency and the effectiveness of the test results are improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0046] Figure 1 A structural schematic diagram of a vehicle chargeable energy storage device provided by the embodiment of the present application is shown in the figure.

[0047] Figure 2 A structural schematic diagram of a vehicle driving range test system provided by the embodiment of the present application is shown in the figure.

[0048] Figure 3 A structural schematic diagram of another vehicle driving range test system provided by the embodiment of the present application is shown in the figure.

[0049] Figure 4 A flowchart of a vehicle driving range test method provided by the embodiment of the present application is shown in the figure.

[0050] Figure 5 A flowchart of another vehicle driving range test method provided by the embodiment of the present application is shown in the figure.

DETAILED DESCRIPTION

[0051] In order to better understand the technical solutions of the embodiments of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0052] It should be clear that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] The terminology used in the description of the application embodiments herein is for the purpose of describing particular application embodiments only and is not intended to be limiting of application embodiments. As used in the description of the application embodiments and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0054] Figure 1 A schematic structural diagram of a vehicle chargeable energy storage device according to an application embodiment.

[0055] As shown in Figure 1 The vehicle chargeable energy storage device 10 can include a power storage battery 101 and a low-voltage storage battery 102. Optionally, the low-voltage storage battery can be a lead-acid battery. The vehicle chargeable energy storage device 10 is connected to a high-voltage distribution box, a motor controller, a drive motor and a DC-DC converter to provide power for vehicle operation. Specifically, each vehicle chargeable energy storage device 10 is internally configured with a second current sensor and a second voltage sensor to collect the instantaneous current and instantaneous voltage of the positive and negative electrodes of each vehicle chargeable energy storage device.

[0056] Figure 2 A schematic structural diagram of a vehicle range test system according to an application embodiment.

[0057] The vehicle range test method according to an application embodiment further includes a first current sensor and a first voltage sensor configured on the power supply negative or positive wire harness of each vehicle chargeable energy storage device 10 before starting the test to collect the real-time current and real-time voltage of each vehicle chargeable energy storage device 10 during the test, thereby determining the real-time power consumption of the vehicle during the test.

[0058] In addition, to timely detect whether the collected real-time power consumption is accurate during the test, the application embodiment simultaneously acquires the instantaneous current and instantaneous voltage collected by the second current sensor and the second voltage sensor as reference values of the real-time current and real-time voltage. According to the instantaneous current and instantaneous voltage, the instantaneous power consumption of the vehicle is obtained by calculation as a reference value of the real-time power consumption. It can be understood that the instantaneous current and instantaneous voltage collected by the second current sensor and the second voltage sensor are the reference current and reference voltage of the application embodiment, and the instantaneous power consumption is the reference power consumption of the application embodiment. Specifically, when the first difference between the real-time power consumption and the reference power consumption exceeds a preset first error threshold, the test is terminated. The tester adjusts the accuracy of the first voltage sensor and the first current sensor according to the real-time voltage, real-time current, reference voltage and reference current at each moment during the test. After the adjustment is completed, the vehicle range test is performed again.

[0059] In some embodiments, the real-time vehicle speed during the test is also acquired to determine the vehicle's range. Specifically, a first speed sensor is configured to acquire the real-time vehicle speed during the test. According to the test logic of the embodiments of the present application, the test is terminated when the real-time vehicle speed is lower than a preset minimum speed. The range of the vehicle is determined according to the real-time vehicle speed at each time during the test. Optionally, the preset minimum speed can be set according to actual conditions, which is not limited by the embodiments of the present application.

[0060] Similarly, in order to detect whether the acquired real-time vehicle speed has errors in a timely manner during the test, the embodiments of the present application also acquire the instantaneous vehicle speed collected by a second speed sensor configured in the vehicle as a reference speed of the real-time vehicle speed. Specifically, a second difference between the real-time vehicle speed and the reference speed is acquired in real time. It is determined whether the second difference exceeds a preset second error threshold. In some embodiments, if the second difference exceeds the second error threshold, it indicates that the error of the acquired real-time vehicle speed is too large, and the test is terminated. After the tester adjusts the accuracy of the first sensor, the range test is performed again. If the second difference does not exceed the second error threshold, the test is continued. Until the real-time vehicle speed is lower than the preset minimum speed, the test is terminated. Optionally, the second error threshold can be set according to actual conditions, which is not limited by the embodiments of the present application.

[0061] As shown in Figure 2 The vehicle range test system can include a chassis dynamometer 201, an electric metering acquisition device 202, a vehicle-mounted bus data acquisition device 203, and a host computer 204. Specifically, the host computer 204 is communicatively connected with the chassis dynamometer 201, the electric metering acquisition device 202, and the vehicle-mounted bus data acquisition device 203.

[0062] The chassis dynamometer 201 is specifically configured to provide the host computer 204 with the real-time vehicle speed of the vehicle. Specifically, the chassis dynamometer 201 is configured with the first speed sensor to acquire the real-time vehicle speed of the vehicle.

[0063] The electric metering acquisition device 202 is specifically configured to provide the host computer 204 with the real-time voltage and the real-time current of the vehicle's rechargeable energy storage device 10. Specifically, the electric metering acquisition device 202 includes the first current sensor and the first voltage sensor to acquire the real-time current and the real-time voltage.

[0064] The vehicle-mounted bus data acquisition device 203 is specifically configured to provide the host computer 204 with the reference voltage, the reference current of the vehicle's rechargeable energy storage device 10, and the reference speed of the vehicle.

[0065] As shown in Figure 3 , the vehicle range test system can further include a first current sensor 301, a first voltage sensor 302, a second current sensor 303, a second voltage sensor 304, a third current sensor 305, a third voltage sensor 306, a fourth current sensor 307, a fourth voltage sensor 308, a first speed sensor 309, and a second speed sensor 310. Figure 3Another structural schematic diagram of a vehicle endurance test system according to an embodiment of the present application is shown. Specifically, the output signals of the second current sensor, the second voltage sensor and the second speed sensor arranged in the vehicle are connected to the vehicle bus data acquisition device 203 through the vehicle bus. Thus, the reference current, the reference voltage and the reference speed are acquired by the vehicle bus data acquisition device 203 in real time and sent to the host computer 204.

[0066] After the first voltage sensor, the first current sensor and the first speed sensor are arranged and calibrated, the vehicle endurance test according to the embodiment of the present application can be performed.

[0067] Figure 4 A flowchart of a vehicle endurance test method according to an embodiment of the present application is shown. Figure 4 The method shown is applied to the host computer 204. As shown in Figure 4 The method shown can include the following steps.

[0068] Step 401: Control the vehicle to run according to a preset test condition.

[0069] Optionally, the preset test condition can be a standard cycle condition, such as a World Light Vehicle Test Cycle (hereinafter referred to as WLTC), a World Light Vehicle Test Procedure (hereinafter referred to as WLTP), a China Light-duty vehicle Test Cycle-passenger (hereinafter referred to as CLTC), etc., or a self-defined condition, which is not limited by the present application.

[0070] It can be understood that the vehicle should be charged before the test starts. The vehicle endurance test is performed under the full charge state of the vehicle. In some embodiments, the host computer charges the chargeable energy storage device 10 of the vehicle according to a preset program. After the charging is completed, the vehicle is controlled to run, and the vehicle endurance test starts.

[0071] Step 402: During the running of the vehicle, the real-time power consumption of the vehicle is acquired.

[0072] Specifically, the output signals of the first current sensor and the first voltage sensor are connected to the host computer 204 through the electric metering acquisition device 202. The host computer 204 acquires the real-time voltage and the real-time current in real time. The real-time power consumption is obtained by integral operation.

[0073] Step 403: Calculate the first difference between the real-time power consumption and the reference power consumption.

[0074] It can be understood that the above reference power consumption is the result of the upper computer integrating and operating the above reference voltage and reference current. Specifically, the output signals of the second current sensor and the second voltage sensor are connected to the upper computer 204 through the vehicle-mounted bus data acquisition device 203. During the test, the upper computer 204 obtains the reference current and the reference voltage in real time. The reference power consumption is obtained according to the reference current and the reference voltage. And the first difference is obtained by difference operation.

[0075] Step 404, determining whether the first difference exceeds the first error threshold.

[0076] The first error threshold is the maximum value of the first difference preset before the vehicle range test. The first error threshold can be set according to the actual situation, and the present application is not limited. Specifically, the upper computer of the embodiment of the present application detects and analyzes the first difference in the test process in real time. If the first difference exceeds the preset first error threshold, it indicates that the accuracy of the first current sensor or the first voltage sensor may be deviated, then step 405 is executed to terminate the vehicle range test. If the first difference does not exceed the preset first error threshold, step 406 is executed to continue the vehicle range test.

[0077] Step 405, if it exceeds, the vehicle range test is terminated.

[0078] Specifically, the termination of the vehicle range test can include stopping the vehicle running and generating a first data record file. The first data record file contains the real-time voltage, real-time current, real-time power consumption during the entire test process, and the corresponding reference voltage, reference current, reference power consumption at the same time. Referring to the data in the first data record file, the accuracy of the first current sensor or the first voltage sensor is adjusted accordingly. After adjustment, step 401 is executed to retest the vehicle range.

[0079] Step 406, if it does not exceed, the real-time vehicle speed of the vehicle is obtained.

[0080] Specifically, the output signal of the first speed sensor is connected to the upper computer 404 to feed back the real-time vehicle speed of the vehicle in real time.

[0081] In some embodiments, the host computer can also detect in real time whether the real-time vehicle speed is accurate. Specifically, when performing step 406, the host computer synchronously acquires a reference vehicle speed of the vehicle. It can be understood that the reference vehicle speed is collected by a second vehicle speed sensor configured inside the vehicle. The output signal of the second vehicle speed sensor is connected to the host computer 204 through the vehicle-mounted bus data acquisition device 203 for real-time feedback. The host computer 204 determines a second difference between the real-time vehicle speed and the reference vehicle speed. It is determined whether the second difference exceeds a preset second error threshold. If it exceeds, the vehicle range test is terminated. If it does not exceed, step 407 is performed. Specifically, the second error threshold can be set according to actual conditions, which is not limited by the present application.

[0082] Step 407: determining whether the real-time vehicle speed is lower than a preset minimum vehicle speed.

[0083] Specifically, if the real-time vehicle speed is lower than the preset minimum vehicle speed, it indicates that the current vehicle operating conditions do not meet the preset test conditions, i.e., the cut-off condition of the vehicle range test has been reached. Step 408 is performed to control the vehicle to stop running, and then the current vehicle range is determined by integral operation, and the vehicle range test is completed. If the real-time vehicle speed is not lower than the preset minimum vehicle speed, step 401 is continued to control the vehicle to run according to the preset test conditions until the real-time vehicle speed is lower than the preset minimum vehicle speed.

[0084] Step 408: if yes, the vehicle is controlled to stop running, and the real-time driving distance of the vehicle is determined according to the real-time vehicle speed.

[0085] Step 409: determining the vehicle range according to the real-time time consumption and the real-time driving distance.

[0086] Specifically, according to the standard of Test methods for energy consumption and range of electric vehicles—Part 1: Light-duty vehicles (hereinafter referred to as GB / T 18386.1-2021), the real-time power consumption and the real-time driving distance in the test process are converted to determine the current vehicle range.

[0087] Figure 5 Another flowchart of a vehicle range test method provided by an embodiment of the present application is shown in FIG. 4. Figure 5 As shown in FIG. 4, the vehicle range test method can include:

[0088] Step 501: the host computer 204 charges the vehicle according to a preset program.

[0089] Step 502, after the charging is completed, the host computer 204 controls the vehicle to run on the chassis dynamometer 201 according to the preset test working condition.

[0090] Step 503, during the running of the vehicle, the electric metering acquisition device 202 collects the real-time current and real-time voltage of the vehicle and sends them to the host computer 204.

[0091] Step 504, the host computer 204 determines the real-time power consumption of the vehicle according to the real-time current and real-time voltage.

[0092] Step 505, the vehicle-mounted bus data acquisition device 203 collects the reference current and reference voltage of the vehicle and sends them to the host computer 204.

[0093] Step 506, the host computer 204 determines the reference power consumption of the vehicle according to the reference voltage and reference current.

[0094] Step 507, the host computer 204 determines the first difference value according to the real-time power consumption and the reference power consumption.

[0095] Step 508, the host computer 204 judges whether the first difference value exceeds the first error threshold. If it exceeds, step 517 is executed. If it does not exceed, step 509 is continued to be executed.

[0096] Step 509, the chassis dynamometer 201 collects the real-time vehicle speed of the vehicle and sends it to the host computer 204.

[0097] Step 510, the vehicle-mounted bus data acquisition device 203 obtains the reference vehicle speed of the vehicle and sends it to the host computer 204.

[0098] Step 511, the host computer 204 determines the second difference value according to the real-time vehicle speed and the reference vehicle speed.

[0099] Step 512, the host computer 204 judges whether the second difference value exceeds the second error threshold. If it exceeds, step 517 is executed to terminate the vehicle range test. If it does not exceed, step 513 is continued to be executed.

[0100] Step 513, the host computer 204 judges whether the real-time vehicle speed is lower than the preset minimum vehicle speed. If the real-time vehicle speed is not lower than the preset minimum vehicle speed, step 502 is executed to control the vehicle to run according to the preset test working condition, and the vehicle range test is continued. If the real-time vehicle speed is lower than the preset minimum vehicle speed, step 514 is executed.

[0101] Step 514, if yes, the host computer 204 controls the vehicle to stop running.

[0102] Step 515, the host computer 204 determines the real-time driving range according to the real-time vehicle speed.

[0103] Step 516, the host computer 204 determines the vehicle range according to the real-time driving range and the real-time power consumption.

[0104] Step 517, the host computer 204 controls the vehicle to stop running.

[0105] Step 518, the host computer 204 generates a first data record file. The first data record file contains the real-time voltage, the real-time current, the real-time power consumption during the test process, and the reference voltage, the reference current, and the reference power consumption corresponding to the same time.

[0106] The vehicle range test method and system provided by the embodiment of the application combine the data collected by the second current sensor, the second voltage sensor and the second vehicle speed sensor built in the vehicle to provide reference for the real-time current, the real-time voltage and the real-time vehicle speed obtained during the test process, so that the problem of inaccurate test results caused by measurement deviation can be effectively avoided. At the same time, during the test process, the host computer can detect and analyze the measurement deviation in real time, and if the measurement deviation exceeds the preset error threshold, the vehicle range test is immediately terminated. The relevant test personnel corrects the test equipment according to the measurement deviation during the test process. After the correction is completed, the range test can be continued. Thus, the technical problem that the measurement deviation can be found only when the data analysis is performed after the test is completed is solved, and the test efficiency and the effectiveness of the test results are improved.

[0107] In the description of the embodiments of the application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the application. In the embodiments of the application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the embodiments of the application and the features of the different embodiments or examples without contradiction.

[0108] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In the description of the embodiments of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0109] Any procedural or methodological descriptions in flow charts or otherwise described herein can be understood to represent modules, segments, or portions of code that include executable instructions for implementing the custom logic functions or procedures, and the scope of preferred embodiments of the present application includes additional implementations in which the functions are performed in an order different from that shown or discussed, including substantially simultaneously, or in reverse order, as will be understood by those skilled in the art of the embodiments of the present application to which the embodiments pertain.

[0110] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "while" or "in response to determining" or "in response to detecting." Similarly, the phrase "if it is determined" or "if [a stated condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon detecting [the stated condition or event]" or "in response to detecting [the stated condition or event]."

[0111] It should be noted that the terminal involved in the embodiments of the present application can include, but is not limited to, a personal computer (PC), a personal digital assistant (PDA), a wireless handheld device, a tablet computer, a mobile phone, an MP3 player, an MP4 player, and the like.

[0112] In several embodiments provided by the present application, it should be understood that the disclosed system, device, and method can be implemented in other manners. For example, the described device embodiments are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices, or units, and can be electrical, mechanical, or in other forms.

[0113] In addition, each functional unit in the various embodiments of the present application can be integrated into one processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software function units.

[0114] The integrated unit in the form of the software function unit can be stored in a computer readable storage medium. The software function unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute part of steps of the method according to the embodiments of the present application. The storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage medium capable of storing program codes.

[0115] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for testing vehicle driving range, characterized in that, The method is applied to a host computer, and the method includes: Control the vehicle operation according to the preset test conditions; During vehicle operation, the real-time power consumption of the vehicle is acquired; Calculate the first difference between the real-time power consumption and the reference power consumption; Determine whether the first difference exceeds the first error threshold; If the range is exceeded, the vehicle range test will be terminated. If not exceeded, determine whether the real-time speed of the vehicle is lower than the preset minimum speed; If so, control the vehicle to stop running and determine the vehicle's real-time mileage based on the real-time vehicle speed; The vehicle's range is determined based on the real-time power consumption and the real-time mileage.

2. The method according to claim 1, characterized in that, The host computer establishes communication connections with the chassis dynamometer, the electrical metering and data acquisition equipment, and the vehicle bus data acquisition equipment, respectively. Before controlling the vehicle to operate according to the preset test conditions, the following steps are also included: The vehicle is charged according to the preset procedure; After charging is completed, the vehicle is controlled to run on the chassis dynamometer according to the preset test conditions to obtain the real-time power consumption and real-time speed of the vehicle.

3. The method according to claim 2, characterized in that, The process of obtaining the real-time power consumption of the vehicle includes: The device acquires the real-time voltage and real-time current of the vehicle's rechargeable energy storage device, which includes a power battery and a low-voltage battery. The real-time power consumption is determined based on the real-time voltage and real-time current.

4. The method according to claim 2, characterized in that, The calculation of the first difference between the real-time power consumption and the reference power consumption includes: During vehicle operation, the reference voltage and reference current of the vehicle's rechargeable energy storage device are acquired in real time by the on-board bus data acquisition device. The reference power consumption is determined based on the reference voltage and reference current; The first difference is determined based on the reference power consumption and the real-time power consumption.

5. The method according to claim 1, characterized in that, The termination of the vehicle range test includes: Control the vehicle to stop running; Generate a first data log file; the first data log file contains real-time voltage, real-time current, real-time power consumption during the test process, as well as the corresponding reference voltage, reference current, and reference power consumption at the same time.

6. The method according to claim 2, characterized in that, Before determining whether the real-time vehicle speed is lower than the preset minimum vehicle speed, the method further includes: The reference vehicle speed collected by the vehicle bus data acquisition device is acquired synchronously. Calculate the second difference between the real-time vehicle speed and the reference vehicle speed; Determine whether the second difference exceeds the second error threshold; If the speed does not exceed the limit, then determine whether the real-time vehicle speed is lower than the preset minimum vehicle speed.

7. The method according to claim 6, characterized in that, The step of determining whether the second difference exceeds the second error threshold further includes: If the second difference exceeds the second error threshold, the vehicle range test is terminated.

8. The method according to claim 1, characterized in that, Determining whether the real-time vehicle speed is lower than the preset minimum vehicle speed also includes: If the real-time vehicle speed is not lower than the preset minimum vehicle speed, the vehicle operation will continue to be controlled according to the preset test conditions until the real-time vehicle speed is lower than the preset minimum vehicle speed.

9. A vehicle driving range testing system, characterized in that, This includes a chassis dynamometer, electrical metering and data acquisition equipment, vehicle-mounted bus data acquisition equipment, and a host computer; The chassis dynamometer is used to provide the host computer with the real-time vehicle speed; The electricity metering and data acquisition device is used to provide the host computer with the real-time power consumption of the vehicle. The vehicle bus data acquisition device is used to provide reference power consumption to the host computer; The host computer establishes communication connections with the chassis dynamometer, the electrical metering acquisition device, and the vehicle bus data acquisition device, respectively, and is used to execute the method described in any one of claims 1 to 8.

10. The system according to claim 9, characterized in that, The electricity metering and data acquisition device is also used to provide the host computer with the real-time voltage and real-time current of the vehicle's rechargeable energy storage device; the vehicle's rechargeable energy storage device includes a power battery and a low-voltage battery. The vehicle bus data acquisition device is also used to provide the host computer with reference voltage and reference current of the vehicle's rechargeable energy storage device; and to provide the host computer with reference vehicle speed.

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