A pure electric vehicle energy consumption and endurance automatic testing method and system

Abstract

The application discloses a kind of pure electric vehicle energy consumption and endurance automation test method and system, belong to vehicle test technical field, the method includes obtaining pure electric vehicle energy consumption and endurance test theoretical operating curve;According to theoretical operating curve, vehicle is carried out energy consumption and endurance first test;Obtain the electric energy consumption, the endurance mileage of vehicle in CSSM stage, the electric energy consumption, the endurance mileage of vehicle in CSSE stage in first test process and the total electric energy consumption of first test vehicle;According to electric energy consumption, endurance mileage, the electric energy consumption, the endurance mileage of vehicle in CSSE stage and the total electric energy consumption of first test vehicle, determine the target endurance mileage of vehicle in CSSM stage;And update theoretical operating curve;Using updated operating curve, vehicle is carried out energy consumption and endurance second test again.Guarantee that vehicle energy consumption and endurance test meet relevant provisions, improve the efficiency and accuracy of operating curve determination.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle testing technology, and in particular to an automated testing method and system for the energy consumption and range of pure electric vehicles. Background Technology

[0002] The driving range of electric vehicles (EVs) has always been a significant performance factor affecting user experience and a crucial parameter for the competitiveness of EV products. To improve the speed of determining the driving range of EVs, a method has emerged that uses a shortening test to quickly determine the driving range of EVs.

[0003] In related technologies, when using the shortening method to determine the driving range of an electric vehicle, the driving range of each stage (DS1, CSSM, DS2, and CSSE) to be driven by the electric vehicle is first theoretically calculated based on the vehicle's basic information, forming a theoretical operating condition curve. Then, the vehicle is controlled to conduct a driving range test using the theoretical operating condition curve.

[0004] However, due to the discrepancy between theoretical calculations and actual vehicle driving, when the vehicle is controlled by the theoretical operating condition curve for range testing, it cannot be guaranteed that the energy consumption will reach the target value when the vehicle reaches the CSSE stage. As a result, the vehicle range test cannot meet the relevant regulations, and it is necessary to manually test and adjust the range of the CSSM stage repeatedly to meet the requirements, which is time-consuming and laborious. [1] Summary of the Invention To address the aforementioned issues, this invention proposes an automated testing method and system for the energy consumption and range of pure electric vehicles. Based on experimentally measured values, the theoretical operating condition curve is updated. Using the updated operating condition curve, energy consumption and range tests are conducted on the vehicle, ensuring that the vehicle's energy consumption and range tests meet relevant regulations, thereby improving the efficiency and accuracy of range determination in the CSSM stage.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an automated testing method for the energy consumption and driving range of a pure electric vehicle, comprising: Obtain the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles; Based on the theoretical operating condition curves, the vehicle's energy consumption and driving range were initially tested. During the initial test, the energy consumption and driving range of the vehicle in the CSSM phase, the energy consumption and driving range of the vehicle in the CSSE phase, and the total energy consumption of the vehicle in the initial test were obtained. Based on the vehicle's energy consumption in the CSSE phase and the total energy consumption of the vehicle in the initial test, determine the additional energy consumption required for the vehicle in the CSSM phase. The energy consumption rate of the CSSM phase is determined based on the driving range and energy consumption of the CSSM phase. Based on the energy consumption rate during the CSSM phase and the additional electrical energy consumption required by the vehicle during the CSSM phase, determine the additional driving range required by the vehicle during the CSSM phase. The target range for the vehicle in the CSSM phase is determined based on the additional driving range required and the theoretical driving range of the vehicle in the CSSM phase. The theoretical operating condition curve is updated based on the vehicle's target driving range in the CSSM phase [2]; The energy consumption and driving range of the vehicle were tested again using the updated operating curves.

[0006] As an alternative implementation method, the ratio of the energy consumption of the vehicle in the CSSE phase to the total energy consumption of the vehicle in the initial test is calculated. When the ratio is less than the set ratio threshold, the amount of additional electrical energy consumption required by the vehicle in the CSSM phase is determined to be 0. When the ratio is greater than the set ratio threshold, the error between the ratio of the energy consumption of the vehicle in the CSSE stage to the total energy consumption of the vehicle in the initial test and the set ratio threshold is calculated; the error is multiplied by the total energy consumption of the vehicle in the initial test, which is taken as the additional energy consumption that the vehicle needs to consume in the CSSM stage. [3] As an optional implementation method, the theoretical operating condition curve is the relationship curve between driving range and vehicle speed, including the DS1 stage, CSSM stage, DS2 stage and CSSE stage; among them, the CSSM stage and CSSE stage are both constant speed driving stages.

[0007] As an alternative implementation method, when conducting energy consumption and range tests on a vehicle, the vehicle is deemed to have completed the energy consumption and range test when it fails to maintain the set target speed for a set period of time during the CSSE phase.

[0008] As an alternative implementation, the theoretical driving range of the vehicle in the CSSM phase is equal to the total theoretical driving range of the vehicle in the discharge phase minus the theoretical driving range of the DS1 phase, the theoretical driving range of the DS2 phase, and the theoretical driving range of the CSSE phase.

[0009] As an alternative implementation method, when the vehicle's energy consumption and range are tested again, the range of each stage is obtained. The vehicle's remaining range is determined based on the remaining range at each stage.

[0010] Secondly, the present invention provides an automated testing system for the energy consumption and driving range of a pure electric vehicle, comprising: The curve acquisition unit is used to acquire the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles. The control unit is used to perform energy consumption and range tests on the vehicle based on theoretical operating condition curves and updated operating condition curves. The data acquisition unit is used to acquire the energy consumption and driving range of the vehicle in the CSSM stage, the energy consumption and driving range of the vehicle in the CSSE stage, and the total energy consumption of the vehicle in the initial test during the initial test. The curve update unit is used to determine the additional energy consumption required by the vehicle in the CSSM phase based on the energy consumption of the vehicle in the CSSE phase and the total energy consumption of the vehicle in the initial test; to determine the energy consumption rate in the CSSM phase based on the driving range and energy consumption in the CSSM phase; to determine the additional driving range required by the vehicle in the CSSM phase based on the energy consumption rate in the CSSM phase and the additional energy consumption required by the vehicle in the CSSM phase; to determine the target driving range of the vehicle in the CSSM phase based on the additional driving range required by the vehicle in the CSSM phase and the theoretical driving range; and to update the theoretical operating condition curve based on the target driving range of the vehicle in the CSSM phase.

[0011] Thirdly, a computer device is proposed, the device comprising: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the automated testing method for energy consumption and range of a pure electric vehicle proposed in the first aspect.

[0012] Fourthly, a computer-readable storage medium is proposed, which stores a computer program adapted to be loaded and executed by a processor, namely, an automated testing method for energy consumption and range of pure electric vehicles proposed in the first aspect.

[0013] Fifthly, a computer program product is proposed, which includes a computer program that, when executed by a processor, implements an automated testing method for the energy consumption and range of a pure electric vehicle proposed in the first aspect.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention proposes an automated testing method and system for the energy consumption and driving range of pure electric vehicles. The method, after determining the theoretical operating condition curves for energy consumption and driving range testing of pure electric vehicles, first controls the vehicle's operation based on these curves and measures the vehicle's energy consumption and driving range during the CSSM (Constant Core Mode) phase, the energy consumption and driving range during the CSSE (Constant Core Energy Mode) phase, and the total energy consumption of the vehicle in the initial test. Based on the measured data, the target driving range for the CSSM phase is determined. The theoretical operating condition curve is then updated based on the target driving range in the CSSM phase, making the updated curve more consistent with relevant regulations. This improves the efficiency and accuracy of determining the driving range and operating condition curves for the CSSM phase. When energy consumption and driving range testing of electric vehicles is conducted based on this updated operating condition curve, the accuracy of the determined vehicle driving range can be guaranteed. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0016] Figure 1 A flowchart of an automated testing method for energy consumption and driving range of a pure electric vehicle provided in an embodiment of the present invention; Figure 2 This invention provides an application system architecture diagram for an automated testing method for the energy consumption and range of a pure electric vehicle. Figure 3 This invention provides a schematic diagram of the system structure and communication for an automated testing method for the energy consumption and range of a pure electric vehicle. Figure 4 This is a schematic diagram of real-time calculation of the testing process provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the test report obtained after the test is completed, provided as an embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed description is exemplary and intended to provide an illustration of alternative embodiments of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that the terms “comprising” and “including”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0020] This invention proposes an automated testing method for the energy consumption and driving range of pure electric vehicles, which is applied to the application scenario of testing the energy consumption and driving range of electric vehicles.

[0021] In recent years, pure electric vehicles, as a new energy vehicle, have experienced rapid development due to their zero pollution and diversified energy sources. However, energy consumption and driving range remain among the main factors limiting the widespread adoption of pure electric vehicles. The driving range of electric vehicles has always been a significant performance factor affecting user experience and is also a crucial parameter for the competitiveness of electric vehicle products.

[0022] The testing methods for the driving range of pure electric vehicles can be divided into the shortening method and the continuous method. Currently, the shortening method has become the main method for measuring the driving range and energy consumption of pure electric vehicles. Many countries have issued standards for testing the energy consumption and driving range of pure electric vehicles using the shortening method. The standard stipulates that the energy consumption and driving range test of electric vehicles needs to go through four stages: DS1 stage, CSSM stage, DS2 stage and CSSE stage. Moreover, the energy consumption of the vehicle in the CSSE stage cannot exceed the set percentage of the total energy consumption in the test stage, such as 10%.

[0023] In related technologies, when using the shortening method to determine the driving range of an electric vehicle, the driving range of each stage (DS1, CSSM, DS2, and CSSE) to be driven by the electric vehicle is first theoretically calculated based on the vehicle's basic information, forming a theoretical operating condition curve. Then, the vehicle is controlled to conduct a driving range test using the theoretical operating condition curve.

[0024] However, due to the discrepancy between theoretical calculations and actual vehicle driving, when using theoretical operating condition curves to control the vehicle for range testing, it cannot be guaranteed that the energy consumption will reach the target value when the vehicle reaches the CSSE stage. This results in the vehicle range test failing to meet relevant regulations, and consequently, the accuracy of the determined vehicle range cannot be guaranteed.

[0025] To address the aforementioned issues, this invention proposes an automated testing method for the energy consumption and range of pure electric vehicles. After determining the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles, the method first conducts an initial energy consumption and range test on the vehicle based on these curves. During the initial test, the vehicle's energy consumption and range are measured in the CSSM (Constant Core Mode) phase, the CSSE (Constant Core Energy Mode) phase, and the total energy consumption of the vehicle in the initial test. Based on the energy consumption in the CSSE phase and the total energy consumption of the vehicle in the initial test, the additional energy consumption required in the CSSM phase is determined, and the target range for the CSSM phase is established. The theoretical operating condition curves are then updated based on the target range in the CSSM phase, ensuring that the updated curves better conform to relevant regulations. When energy consumption and range testing of electric vehicles is conducted based on these updated curves, the accuracy of the determined vehicle range is guaranteed. Furthermore, this method is also applicable to testing the energy consumption and range of pure electric vehicles in the EU.

[0026] On July 1, 2017, the European Commission adopted Regulation (EU) 2017 / 1151. This regulation establishes a new Worldwide Harmonized Test Cycle (WLTC) for transitional vehicles that more closely approximates real-world operating conditions, and based on this cycle, specifies the testing method for the driving range of pure electric vehicles. This method determines whether to use a shortened or continuous testing procedure based on the estimated driving range. For most pure electric vehicles at present, the shortened testing procedure generally falls under this category. The purpose of the shortened testing procedure for pure electric vehicles in Regulation (EU) 2017 / 1151 is to save testing time by using a high constant vehicle speed condition to quickly consume the battery energy and calculate the driving range of the pure electric vehicle. This invention proposes an automated testing method for the energy consumption and driving range of pure electric vehicles, which can achieve automated energy consumption and driving range testing according to the testing requirements of this regulation, significantly improving testing efficiency.

[0027] This invention proposes an application system for an automated testing method for the energy consumption and driving range of pure electric vehicles, as shown in the embodiments of the present invention. Figure 2 , Figure 3 As shown, it includes: analysis module, display screen, four-wheel drive drum, fan, environmental chamber, HDMI switch, gigabit switch, CNAFD device and power analyzer, etc.

[0028] in, Figure 2 The driver assistant in the system is a display screen; the chassis dynamometer is a four-wheel drive drum; and the data acquisition box is used to acquire the battery pack output current during vehicle operation.

[0029] The display screen shows the operating condition curves; the four-wheel drive drum simulates the vehicle's driving state on the road; the fan provides wind resistance for the vehicle; the environmental chamber provides suitable temperature and humidity for the vehicle; the HDMI switcher connects the analysis module to various power analyzers, the four-wheel drive drum, etc.; the gigabit switch is used for signal exchange; the CNAFD device connects the vehicle to the interface panel, and then to the drum computer; the power analyzer obtains the battery pack output current and calculates the vehicle's energy consumption.

[0030] Based on this, a detailed description of the automated testing method for energy consumption and range of pure electric vehicles proposed in this invention is provided. like Figure 1 As shown, the present invention proposes an automated testing method for the energy consumption and driving range of a pure electric vehicle, comprising: Obtain the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles; Based on the theoretical operating condition curves, the vehicle's energy consumption and driving range were initially tested. During the initial test, the energy consumption and driving range of the vehicle in the CSSM phase, the energy consumption and driving range of the vehicle in the CSSE phase, and the total energy consumption of the vehicle in the initial test were obtained. Based on the vehicle's energy consumption in the CSSE phase and the total energy consumption of the vehicle in the initial test, determine the additional energy consumption required for the vehicle in the CSSM phase. The energy consumption rate of the CSSM phase is determined based on the driving range and energy consumption of the CSSM phase. Based on the energy consumption rate during the CSSM phase and the additional electrical energy consumption required by the vehicle during the CSSM phase, determine the additional driving range required by the vehicle during the CSSM phase. The target range for the vehicle in the CSSM phase is determined based on the additional driving range required and the theoretical driving range of the vehicle in the CSSM phase. The theoretical operating condition curve is updated based on the vehicle's target driving range in the CSSM phase. The energy consumption and driving range of the vehicle were tested again using the updated operating curves.

[0031] The theoretical operating condition curve is the relationship between driving range and vehicle speed, including the DS1 stage, CSSM stage, DS2 stage and CSSE stage; among them, the CSSM stage and CSSE stage are both constant speed driving stages.

[0032] The driving speed for the CSSM and CSSE stages is determined according to relevant regulations and can be 100 km / h.

[0033] The theoretical driving range of the vehicle in the CSSM phase d CSSMEqual to the theoretical total driving range during the vehicle's discharge phase (BER) est Subtract the theoretical driving range d of DS1 stage DS1 The theoretical driving range of DS2 stage d DS2 Theoretical driving range d at the CSSE stage CSSE .

[0034] d CSSM =BER est -d DS1 -d CSSE -d DS2 The theoretical driving range for DS1 and DS2 stages is determined according to relevant regulations; the theoretical driving range for the CSSE stage is calculated based on the remaining electrical energy at the start of the CSSE stage after the end of the DS2 stage; the theoretical total driving range (BER) for the vehicle's discharge stage is... est The energy level is estimated based on the rated energy of the vehicle's battery pack and basic vehicle information.

[0035] Before conducting energy consumption and range tests on pure electric vehicles, this invention first carried out experimental preparations, including: 1.1 Record basic information such as the test vehicle's chassis number, drive motor number, driving mileage, tire manufacturer and model, and VCU software version.

[0036] 1.2 Check whether the front and rear tow hooks of the vehicle meet the requirements for fixing on the four-wheel drive drum.

[0037] 1.3 Clean the test vehicle. Ensure the test vehicle is clean and remove any debris stuck in the tires.

[0038] 1.4 Rotate the vehicle tires on the lift to ensure that there is no obvious jamming during tire rotation.

[0039] 1.5 Check whether the vehicle's coolant, brake fluid, etc., meet the filling requirements.

[0040] 1.6 The tire pressure of the vehicle should be adjusted to meet the requirements of the manufacturer's technical standards.

[0041] 1.7 The vehicle is required to have a range of more than 300km and the power battery must be fully charged and discharged at least once.

[0042] 1.8 The vehicle is fully charged according to relevant requirements, and the instrument panel shows that the vehicle's battery level is 100%.

[0043] When conducting energy consumption and range tests on pure electric vehicles, the ambient temperature of the environmental chamber where the vehicle is located is set to 23°C and the humidity to 50%. Adjust the drum to four-wheel drive mode and preheat the drum (set the drum speed to 120km / h, preheating time: about 15-20 minutes in summer, 30 minutes in winter). Move the test vehicle onto the drum, align it, and secure it firmly. Connect two current clamps to the positive and negative cables of the battery pack's main output, respectively. Connect one current clamp to either the positive or negative terminal of the 12-volt small battery. Then connect three current clamps to channels 1, 2, and 3 of the power analyzer. After connecting the current clamps to the power analyzer, power off the vehicle for 10 minutes. After 10 minutes, turn on the power analyzer to perform a zero-calibration operation. If it is a four-wheel drive vehicle, the power battery pack has two outputs, requiring two additional current clamps connected to the power analyzer. Select the road simulation mode on the automated control system interface and input the resistance curve corresponding to the test vehicle; Set the oncoming fan speed to follow the vehicle speed and turn on the fan; Release the drum brake and power on the drum motor; Click the start button, and the automated system will begin recording vehicle speed, distance traveled, power consumption, and ambient temperature.

[0044] The driver assistance system displays a theoretical operating condition curve. Based on this curve, the driver drives the vehicle sequentially through stages DS1, CSSM, DS2, and CSSE to conduct the initial energy consumption and range test. The system also calculates and records the driving range and changes in the vehicle's battery pack's electrical energy in real time for each stage. Figure 4 As shown, by measuring the change in electrical energy, the electrical energy consumption of the vehicle at each stage and the total electrical energy consumption of the vehicle can be determined.

[0045] When conducting energy consumption and range tests on a vehicle, the test is considered complete when the vehicle fails to maintain the set target speed for a set period of time during the CSSE phase.

[0046] The target speed and the set time can be determined according to relevant regulations, such as setting the target speed to 98 km / h and the set time to 4 seconds.

[0047] After the DS2 stage, the driver will proceed to the CSSE stage at a constant speed of 100 km / h along the curve. If the vehicle cannot maintain 98 km / h for 4 consecutive seconds during the constant speed CSSE stage, the test should be stopped and the test end button should be clicked.

[0048] After the test is completed, check and save the test data, lock the drum, remove the current clamp, close the environmental chamber, and remove the test vehicle from the drum. The test is then over. After the test, the vehicle was pushed into a 23°C insulated room for AC charging, and the AC charging amount data was recorded.

[0049] The recorded data is then analyzed to determine the target driving range for the vehicle during the CSSM phase.

[0050]

[0051] In the formula, EC WLTC : Energy consumption of the WLTC test cycle based on the AC charging amount from the external source during the initial test, in Wh / km; E AC : The amount of AC charging from the external source is measured, in watt-hours (Wh); PER WLTC : Driving range based on the WLTC cycle, in kilometers (km); EC City The shortening method is based on the energy consumption of the City test cycle corresponding to the AC charging amount from the outside, in Wh / km. E AC : The amount of AC charging from the external source is measured, in watt-hours (Wh); PER city : Driving range based on the City cycle, in kilometers (km); UBE STP The total electrical energy consumption of the vehicle during the initial test, expressed in watt-hours (Wh). ΔE REESS;DS1 : The change in electrical energy of all REESS (Rechargeable Energy Storage System) of the DS1 vehicle during the test cycle, in watt-hours (Wh); ΔE REESS;DS2 : The change in electrical energy of all REESS in the test cycle DS2, in watt-hours (Wh); ΔE REESS;CSSM : The change in electrical energy of all REESS in the constant speed CSSM, in watt-hours (Wh); ΔE REESS;CSSE : The change in electrical energy of all REESS in the constant speed CSSE, in watt-hours (Wh); EC DC,WLTC, The weighted energy consumption of j WLTC test cycles based on REESS energy variation in the shortening method, in watt-hours per kilometer (Wh / km); EC DC,WLTC,j : The energy consumption of the j-th WLTC test cycle based on the REESS energy change in the shortening method, in watt-hours per kilometer (Wh / km); k WLTC,j : Weighting coefficients for the j-th WLTC trial cycle of the shortening method; ΔE REESS,WLTC,1 : The change in electrical energy of all REESS in the first WLTC test cycle of the shortening method, in watt-hours (Wh).

[0052] EC DC,city, The weighted energy consumption of j city test cycles based on REESS energy variation is expressed in watt-hours per kilometer (Wh / km). EC DC,city,j : The energy consumption of the j-th city test cycle based on the REESS energy change, in watt-hours per kilometer (Wh / km); K city,j The weighting coefficients for the j-th city trial loop in the initial test; ΔE REESS,city,1 : The change in electrical energy of all REESS in the first city test cycle during the initial test, in watt-hours (Wh).

[0053] U(t) REESS,j,i : The voltage value of REESS numbered j at time t within the time range of the i-th velocity interval, in volts (V); I(t) j，i : The current value of REESS numbered j at time t within the time range of the i-th velocity interval, in amperes (A); ΔE REESSj，i : The change in REESS energy numbered j within the time range of the i-th velocity interval, expressed in watt-hours (Wh). In some embodiments, the ratio of the energy consumption of the vehicle in the CSSE phase to the total energy consumption of the vehicle in the initial test is calculated. When the ratio is less than the set ratio threshold, the amount of additional electrical energy consumption required by the vehicle in the CSSM phase is determined to be 0. When the ratio is greater than the set ratio threshold, calculate the error between the ratio of the energy consumption of the vehicle in the CSSE stage to the total energy consumption of the vehicle in the initial test and the set ratio threshold; multiply the error by the total energy consumption of the vehicle in the initial test to obtain the additional energy consumption required for the vehicle in the CSSM stage.

[0054] According to regulations, the energy consumption of vehicles in the CSSE stage cannot exceed 10% of the total energy consumption of vehicles in the initial test. Therefore, the set threshold is 10%.

[0055] The energy consumption rate of the CSSM phase is determined by dividing the energy consumption of the CSSM phase by the driving range of that phase.

[0056] Divide the additional energy consumption required by the vehicle during the CSSM phase by the energy consumption rate during the CSSM phase to obtain the additional driving range required by the vehicle during the CSSM phase.

[0057] The target driving range for the vehicle in the CSSM phase is determined by adding the additional driving range required for the vehicle in the CSSM phase to the theoretical driving range of that phase.

[0058] The theoretical driving range in the CSSM stage of the theoretical driving condition curve is replaced with the target driving range to update the theoretical driving condition curve.

[0059] Then, using the updated operating curves, energy consumption and range tests were conducted on the vehicle.

[0060] When retesting the vehicle's energy consumption and range, obtain the range at each stage; The vehicle's remaining range is determined based on the remaining range at each stage.

[0061] The vehicle's driving range is equal to the sum of the driving ranges of vehicles in the DS1, CSSM, DS2, and CSSE stages.

[0062] And generate as Figure 5 The test report shown.

[0063] The present invention proposes an automated testing method for the energy consumption and range of a pure electric vehicle. By conducting an initial energy consumption and range test on the vehicle, and then updating the theoretical operating condition curve based on the initial test results, the updated operating condition curve is used to conduct a second energy consumption and range test on the vehicle. This ensures that the energy consumption and range test is consistent with relevant regulations and guarantees the accuracy of the energy consumption and range test.

[0064] This invention also proposes an automated testing system for the energy consumption and driving range of pure electric vehicles, comprising: The curve acquisition unit is used to acquire the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles. The control unit is used to perform energy consumption and range tests on the vehicle based on theoretical operating condition curves and updated operating condition curves. The data acquisition unit is used to acquire the energy consumption and driving range of the vehicle in the CSSM stage, the energy consumption and driving range of the vehicle in the CSSE stage, and the total energy consumption of the vehicle in the initial test during the initial test. The curve update unit is used to determine the additional energy consumption required by the vehicle in the CSSM phase based on the energy consumption of the vehicle in the CSSE phase and the total energy consumption of the vehicle in the initial test; to determine the energy consumption rate in the CSSM phase based on the driving range and energy consumption in the CSSM phase; to determine the additional driving range required by the vehicle in the CSSM phase based on the energy consumption rate in the CSSM phase and the additional energy consumption required by the vehicle in the CSSM phase; to determine the target driving range of the vehicle in the CSSM phase based on the additional driving range required by the vehicle in the CSSM phase and the theoretical driving range; and to update the theoretical operating condition curve based on the target driving range of the vehicle in the CSSM phase.

[0065] It should be noted that the above-described automated testing system for the energy consumption and range of a pure electric vehicle is only illustrated by the division of the functional units described above when conducting vehicle energy consumption and range tests. In practical applications, the functions described above can be assigned to different functional modules as needed, that is, the internal structure of the equipment can be divided into different functional modules to complete all or part of the functions described above. Furthermore, the automated testing system for the energy consumption and range of a pure electric vehicle provided in the above embodiments and the automated testing method for the energy consumption and range of a pure electric vehicle belong to the same concept, and their specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0066] In further embodiments, the following is also provided: A computer device comprising: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements an automated testing method for energy consumption and range of a pure electric vehicle disclosed in an embodiment of the present invention.

[0067] A computer-readable storage medium storing a computer program adapted for loading by a processor and executing an automated testing method for energy consumption and driving range of a pure electric vehicle disclosed in embodiments of the present invention.

[0068] A computer program product, comprising a computer program, which, when executed by a processor, implements an automated testing method for the energy consumption and range of a pure electric vehicle disclosed in an embodiment of the present invention.

[0069] The method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0070] Those skilled in the art will recognize that the units and algorithm steps described in conjunction with the embodiments herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0071] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An automated testing method for the energy consumption and driving range of a pure electric vehicle, characterized in that, include: Obtain the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles; Based on the theoretical operating condition curves, the vehicle's energy consumption and driving range were initially tested. During the initial test, the energy consumption and driving range of the vehicle in the CSSM phase, the energy consumption and driving range of the vehicle in the CSSE phase, and the total energy consumption of the vehicle in the initial test were obtained. Based on the vehicle's energy consumption in the CSSE phase and the total energy consumption of the vehicle in the initial test, determine the additional energy consumption required for the vehicle in the CSSM phase. The energy consumption rate of the CSSM phase is determined based on the driving range and energy consumption of the CSSM phase. Based on the energy consumption rate during the CSSM phase and the additional electrical energy consumption required by the vehicle during the CSSM phase, determine the additional driving range required by the vehicle during the CSSM phase. The target range for the vehicle in the CSSM phase is determined based on the additional driving range required and the theoretical driving range of the vehicle in the CSSM phase. The theoretical operating condition curve is updated based on the vehicle's target driving range in the CSSM phase. The energy consumption and driving range of the vehicle were tested again using the updated operating curves.

2. The automated testing method for energy consumption and driving range of a pure electric vehicle as described in claim 1, characterized in that, Calculate the ratio of the energy consumption of the vehicle in the CSSE phase to the total energy consumption of the vehicle in the initial test. When the ratio is less than the set ratio threshold, the amount of additional electrical energy consumption required by the vehicle in the CSSM phase is determined to be 0. When the ratio is greater than the set ratio threshold, calculate the error between the ratio of the energy consumption of the vehicle in the CSSE stage to the total energy consumption of the vehicle in the initial test and the set ratio threshold; multiply the error by the total energy consumption of the vehicle in the initial test to obtain the additional energy consumption required for the vehicle in the CSSM stage.

3. The automated testing method for energy consumption and driving range of a pure electric vehicle as described in claim 1, characterized in that, The theoretical operating condition curve is the relationship between driving range and vehicle speed, including the DS1 stage, CSSM stage, DS2 stage and CSSE stage; among them, the CSSM stage and CSSE stage are constant speed driving stages.

4. The automated testing method for energy consumption and driving range of a pure electric vehicle as described in claim 1, characterized in that, When conducting energy consumption and range tests on a vehicle, the test is considered complete when the vehicle fails to maintain the set target speed for a set period of time during the CSSE phase.

5. The automated testing method for energy consumption and driving range of a pure electric vehicle as described in claim 4, characterized in that, The theoretical driving range of a vehicle in the CSSM stage is equal to the total theoretical driving range of the vehicle in the discharge stage minus the theoretical driving range of the DS1 stage, the theoretical driving range of the DS2 stage, and the theoretical driving range of the CSSE stage.

6. The automated testing method for energy consumption and driving range of a pure electric vehicle as described in claim 1, characterized in that, When retesting the vehicle's energy consumption and range, obtain the range at each stage; The vehicle's remaining range is determined based on the remaining range at each stage.

7. An automated testing system for the energy consumption and driving range of a pure electric vehicle, characterized in that, include: The curve acquisition unit is used to acquire the theoretical operating condition curves for energy consumption and range testing of pure electric vehicles. The control unit is used to perform energy consumption and range tests on the vehicle based on theoretical operating condition curves and updated operating condition curves. The data acquisition unit is used to acquire the energy consumption and driving range of the vehicle in the CSSM stage, the energy consumption and driving range of the vehicle in the CSSE stage, and the total energy consumption of the vehicle in the initial test during the initial test. The curve update unit is used to determine the amount of additional energy consumption that the vehicle needs to consume in the CSSM phase based on the energy consumption of the vehicle in the CSSE phase and the total energy consumption of the vehicle in the initial test. The energy consumption rate of the CSSM phase is determined based on the driving range and energy consumption of the CSSM phase. Based on the energy consumption rate during the CSSM phase and the additional electrical energy consumption required by the vehicle during the CSSM phase, determine the additional driving range required by the vehicle during the CSSM phase. The target range for the vehicle in the CSSM phase is determined based on the additional driving range required and the theoretical driving range of the vehicle in the CSSM phase. The theoretical operating condition curve is updated based on the vehicle's target driving range in the CSSM phase.

8. An electronic device, characterized in that, The device includes: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the automated testing method for energy consumption and range of a pure electric vehicle as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program adapted to be loaded by a processor and executed by an automated testing method for energy consumption and range of a pure electric vehicle as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the automated testing method for energy consumption and range of a pure electric vehicle as described in any one of claims 1-6.

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