Automatic testing method and system for energy consumption and driving of pure electric vehicle

Abstract

The invention discloses an automatic testing method and system for energy consumption and driving of a pure electric vehicle, and belongs to the technical field of vehicle testing, and the method comprises the steps: obtaining a theoretical working condition curve of the energy consumption and driving testing of the pure electric vehicle; according to the theoretical working condition curve, carrying out energy consumption and driving initial test on the vehicle; obtaining the electric energy consumption and the driving range of the vehicle in the CSSM stage, the electric energy consumption and the driving range of the vehicle in the CSSE stage and the total electric energy consumption of the initial test vehicle in the initial test process; determining a target driving mileage of the vehicle in the CSSM stage according to the electric energy consumption, the driving mileage, the electric energy consumption of the vehicle in the CSSE stage, the driving mileage and the total electric energy consumption of the vehicle tested for the first time; updating the theoretical working condition curve; and the updated working condition curve is used for carrying out energy consumption and continuous driving re-testing on the vehicle. Therefore, the vehicle energy consumption and driving test are ensured to meet related regulations, and the efficiency and accuracy of working condition curve determination are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle testing, in particular to a pure electric vehicle energy consumption and driving range automatic testing method and system. BACKGROUND

[0002] The driving range of an electric vehicle has always been one of the performances that greatly affects the user experience, and is also an important parameter of the competitiveness of electric vehicle products. In order to improve the determination rate of the driving range of an electric vehicle, a scheme of using a shortening method to test the driving range of an electric vehicle and then quickly determine the driving range of the electric vehicle has appeared.

[0003] In the related art, when the driving range of an electric vehicle is determined by using the shortening method, the driving ranges of the DS1 stage, the CSSM stage, the DS2 stage and the CSSE stage of the electric vehicle are first determined by theoretical calculation according to the basic information of the vehicle, a theoretical working condition curve is formed, and then the vehicle is controlled to perform a driving range test by using the theoretical working condition curve.

[0004] However, since there is a deviation between the theoretical calculation and the actual driving of the vehicle, when the vehicle is controlled to perform a driving range test by using the theoretical working condition curve, it cannot be guaranteed that the vehicle will drive to the CSSE stage and the electric energy consumption will reach the target value, resulting in that the driving range test of the vehicle cannot meet the relevant regulations, and it is necessary to manually repeatedly test and adjust the driving range of the CSSM stage to meet the requirements of the regulations, which is time-consuming and laborious.[1] SUMMARY To solve the above problems, the present application provides a pure electric vehicle energy consumption and driving range automatic testing method and system, which updates the theoretical working condition curve according to the test measured value, and uses the updated working condition curve to test the energy consumption and driving range of the vehicle, so as to ensure that the energy consumption and driving range test of the vehicle meets the relevant regulations, and improves the efficiency and accuracy of the determination of the driving range of the CSSM stage.

[0005] To achieve the above purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a pure electric vehicle energy consumption and driving range automatic testing method, comprising: obtaining a theoretical working condition curve for pure electric vehicle energy consumption and driving range test; performing a first test of energy consumption and driving range of the vehicle according to the theoretical working condition curve; obtaining the electric energy consumption, driving range of the vehicle in the CSSM stage, electric energy consumption, driving range of the vehicle in the CSSE stage, and total electric energy consumption of the vehicle in the first test during the first test; determining the electric energy consumption to be added in the CSSM stage of the vehicle according to the electric energy consumption of the vehicle in the CSSE stage and the total electric energy consumption of the vehicle in the first test; determining the energy consumption rate of the CSSM stage according to the energy consumption and the driving range of the CSSM stage; determining the driving range of the CSSM stage according to the energy consumption rate of the CSSM stage and the energy consumption of the CSSM stage; determining the target driving range of the CSSM stage according to the driving range of the CSSM stage and the theoretical driving range; updating the theoretical driving range curve according to the target driving range of the CSSM stage; testing the energy consumption and the driving range of the vehicle again by using the updated theoretical driving range curve.

[0006] As an optional implementation, the ratio of the energy consumption of the CSSM stage and the total energy consumption of the vehicle in the initial test is calculated; when the ratio is less than the set proportion threshold, the energy consumption of the CSSM stage is determined to be 0; when the ratio is greater than the set proportion threshold, the error between the ratio and the set proportion threshold is calculated, and the error multiplied by the total energy consumption of the vehicle in the initial test is taken as the energy consumption of the CSSM stage. As an optional implementation, the theoretical driving range curve is a curve of the driving range and the vehicle speed, including the DS1 stage, the CSSM stage, the DS2 stage and the CSSE stage; wherein the CSSM stage and the CSSE stage are constant speed driving stages.

[0007] As an optional implementation, when the vehicle cannot maintain the set target speed in the CSSE stage for a continuous set time during the energy consumption and driving range test, it is determined that the energy consumption and driving range test is completed.

[0008] As an optional implementation, the theoretical driving range of the CSSM stage is equal to the theoretical total driving range of the vehicle in the discharging 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.

[0009] As an optional implementation, the driving range of each stage is obtained during the energy consumption and driving range test of the vehicle again; determining the driving range of the vehicle according to the driving range of each stage.

[0010] In a second aspect, the present application provides an automatic energy consumption and driving range test system for a pure electric vehicle, comprising: a curve acquisition unit, configured to acquire a theoretical driving range curve for the energy consumption and driving range test of the pure electric vehicle; a control unit configured to perform energy consumption and driving range test on the vehicle according to the theoretical working curve and the updated working curve; a data acquisition unit configured to acquire the electric energy consumption, the driving range of the vehicle in the CSSM stage, the electric energy consumption, the driving range of the vehicle in the CSSE stage and the total electric energy consumption of the vehicle in the initial test; a curve updating unit configured to determine the electric energy consumption to be added in the CSSM stage of the vehicle according to the electric energy consumption of the vehicle in the CSSE stage and the total electric energy consumption of the vehicle in the initial test, determine the energy consumption rate in the CSSM stage according to the driving range and the electric energy consumption in the CSSM stage, determine the driving range to be added in the CSSM stage of the vehicle according to the energy consumption rate in the CSSM stage and the electric energy consumption to be added in the CSSM stage of the vehicle, determine the target driving range in the CSSM stage of the vehicle according to the driving range to be added in the CSSM stage of the vehicle and the theoretical driving range, and update the theoretical working curve according to the target driving range in the CSSM stage of the vehicle.

[0011] In a third aspect, a computer device is provided, and the device comprises: a processor adapted to execute a computer program; a computer readable storage medium having a computer program stored therein, and the computer program is adapted to be loaded and executed by the processor to implement the method of the first aspect.

[0012] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program is adapted to be loaded and executed by the processor to implement the method of the first aspect.

[0013] In a fifth aspect, a computer program product is provided, and the computer program product comprises a computer program, and the computer program is executed by the processor to implement the method of the first aspect.

[0014] Compared with the prior art, the present application has the following beneficial effects: The application provides a pure electric vehicle energy consumption and endurance automatic test method and system. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation to the application.

[0016] Figure 1 A pure electric vehicle energy consumption and endurance automatic test method flow chart is provided for the embodiments of the application. Figure 2 A pure electric vehicle energy consumption and endurance automatic test method application system architecture diagram is provided for the embodiments of the application. Figure 3 A pure electric vehicle energy consumption and endurance automatic test method application system structure and communication schematic diagram is provided for the embodiments of the application. Figure 4 A test process real-time calculation schematic diagram is provided for the embodiments of the application. Figure 5 A test report schematic diagram obtained after the test is provided for the embodiments of the application. DETAILED DESCRIPTION

[0017] The application is further described below in combination with the drawings and embodiments.

[0018] It should be pointed out that the following detailed description is exemplary, and is intended to provide the application as an optional embodiment description. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0019] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0020] The embodiment of the present application provides a pure electric vehicle energy consumption and endurance automatic testing method, which is applied to the application scene of electric vehicle energy consumption and endurance testing.

[0021] In recent years, as a new energy vehicle, the pure electric vehicle has been rapidly developed due to its zero pollution to the environment and diversification of energy sources. However, the energy consumption and endurance problem is currently one of the main factors restricting the promotion of the pure electric vehicle. The endurance of the electric vehicle is one of the performances that greatly affect the user experience, and is also an important parameter of the competitiveness of the electric vehicle product.

[0022] The endurance test method of the pure electric vehicle can be divided into the shortening method and the continuous method. At present, the shortening method has become the main method for measuring the endurance and energy consumption of the pure electric vehicle. Many countries have introduced standards for testing the energy consumption and endurance of the pure electric vehicle by the shortening method. In the standard, it is stipulated that the energy consumption and endurance test of the electric vehicle needs to go through four stages of DS1 stage, CSSM stage, DS2 stage and CSSE stage, and when the electric energy consumption of the vehicle in the CSSE stage cannot be higher than the set proportion, such as 10%, of the total electric energy consumption in the test stage.

[0023] In the related art, when the endurance of the electric vehicle is determined by using the shortening method, the endurance of each stage of the DS1 stage, the CSSM stage, the DS2 stage and the CSSE stage of the electric vehicle to be driven is first determined by theoretical calculation according to the basic information of the vehicle, a theoretical working condition curve is formed, and then the vehicle is controlled to perform the endurance test by using the theoretical working condition curve.

[0024] However, since there is a deviation between the theoretical calculation and the actual driving of the vehicle, when the vehicle is controlled to perform the endurance test by using the theoretical working condition curve, it cannot be guaranteed that the electric energy consumption of the vehicle can reach the target value when the vehicle drives to the CSSE stage, so that the endurance test of the vehicle cannot meet the relevant regulations, and the accuracy of the determined endurance of the vehicle cannot be guaranteed.

[0025] In order to solve the above problems, the present application provides a kind of pure electric vehicle energy consumption and endurance automated test method, after determining the theoretical operating curve of pure electric vehicle energy consumption and endurance test, first, according to the theoretical operating curve, vehicle is tested for the first time and the energy consumption and endurance of the first test process is measured, the energy consumption of the vehicle in the CSSM stage, the energy consumption of the vehicle in the CSSE stage, the total energy consumption of the first test vehicle is measured, according to the energy consumption of the vehicle in the CSSM stage, the energy consumption of the vehicle in the CSSM stage is determined, and the target endurance of the CSSM stage is determined;According to the target endurance of the vehicle in the CSSM stage, the theoretical operating curve is updated;Make the updated operating curve more suitable for relevant provisions, when the energy consumption and endurance of electric vehicle are tested according to the updated operating curve, the accuracy of the determined vehicle endurance can be ensured;And this method is also suitable for testing the energy consumption and endurance of pure electric vehicle of European Union.

[0026] The European Commission passed regulation (EU) 2017 / 1151 on July 1, 2017. The regulation sets a new global transformation vehicle uniform test cycle (WLTC) cycle operating condition closer to the actual operation of the vehicle, and based on this operating condition, the test method of the endurance of pure electric vehicle is stipulated. The method is based on the estimated endurance to determine whether to use the shortened process or the continuous test process. For most pure electric vehicles at this stage, they generally belong to the category of shortened test procedure. The purpose of the shortened test procedure of pure electric vehicle in regulation (EU) 2017 / 1151 is to save test time, use high constant speed operating condition to quickly consume battery power, and obtain the endurance of pure electric vehicle by calculation. The present application provides a kind of pure electric vehicle energy consumption and endurance automated test method, which can realize the automatic energy consumption and endurance test according to the test requirements of the regulation, and greatly improve the test efficiency.

[0027] The present application provides a kind of pure electric vehicle energy consumption and endurance automated test method as shown in Figure 2 、 Figure 3 The present application provides a kind of pure electric vehicle energy consumption and endurance automated test method as shown in

[0028] Among them, Figure 2 The driver's assistant in the above formula is a display screen;Chassis dynamometer is four-wheel drum;Data acquisition box is used to obtain the output current of battery pack during vehicle driving.

[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 d of the vehicle in the CSSM phase CSSMEqual to the theoretical total driving range of the vehicle discharge phase BER est Subtract the theoretical driving range d of the DS1 phase DS1 , the theoretical driving range d of the DS2 phase DS2 , and the theoretical driving range d of the CSSE phase CSSE .

[0034] d CSSM = BER est -d DS1 -d CSSE -d DS2 The theoretical driving range of the DS1 phase and the DS2 phase is determined according to relevant regulations; the theoretical driving range of the CSSE phase is determined according to the remaining electric energy when the vehicle DS2 phase ends and the CSSE phase starts; the theoretical total driving range of the vehicle discharge phase BER est It is determined by the rated electric energy of the vehicle battery pack and the basic information of the vehicle.

[0035] The present application first carries out test preparation before testing the energy consumption and driving range of the pure electric vehicle, including: 1.1 Record the basic information of the test vehicle, such as vehicle frame number, driving motor number, driving range, tire manufacturer and model, VCU software version, etc.

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

[0037] 1.3 Clean the test vehicle to ensure that the appearance of the test vehicle is clean, and the tire inclusions need to be cleaned.

[0038] 1.4 Turn the tires of the vehicle on the lifting machine to ensure that the tires do not have obvious jamming phenomenon.

[0039] 1.5 Check whether the cooling liquid, brake fluid, etc. of the vehicle meet the filling requirements.

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

[0041] 1.7 The vehicle requires a driving range of more than 300km, and the power battery is at least charged and discharged once.

[0042] 1.8 The vehicle is fully charged according to the relevant requirements, and the instrument shows that the vehicle power is 100%.

[0043] When starting the energy consumption and driving range test of the pure electric vehicle, set the environment temperature of the vehicle environment chamber to 23℃ and the humidity to 50%; Adjust the drum to four-wheel drive mode, and preheat the drum (set the drum speed to 120km / h, preheat time: summer about 15-20min, winter 30min); Move the test vehicle to the drum, and center and secure it firmly; Connect 2 current clamps to the positive and negative cables of the total output of the battery pack, connect 1 current clamp to the positive or negative of the 12-volt small battery, and connect 3 current clamps to channels 1, 2, and 3 of the power analyzer. After the current clamps are connected to the power analyzer, turn off the vehicle for 10 minutes, and after 10 minutes, turn on the power analyzer to perform zero setting. If it is a four-wheel drive vehicle, there are 2 outputs of the power battery pack, and 2 current clamps need to be added and connected to the power analyzer. Select the road simulation mode on the automatic control system interface, and input the resistance curve corresponding to the test vehicle; Set the wind speed of the head-on fan to follow the vehicle speed, and turn on the fan; Loosen the drum brake, and power on the drum motor; Click the start button, and the automatic system starts recording the vehicle speed, driving distance, power consumption, and ambient temperature.

[0044] Through the driver assistance display theoretical working condition curve, the driver drives the vehicle according to the curve in the DS1 stage, the CSSM stage, the DS2 stage, and the CSSE stage according to the working condition curve displayed by the driver assistance, to perform the initial test of energy consumption and cruising range; and the cruising range and the change of the electric energy of the vehicle battery pack in each stage are calculated and recorded in real time, as shown in Figure 4 Through the change of the electric energy, the electric energy consumption of the vehicle in each stage and the total electric energy consumption of the vehicle can be determined.

[0045] When the vehicle cannot maintain the set target speed for a continuous set time in the CSSE stage during the test of energy consumption and cruising range of the vehicle, it is determined that the test of energy consumption and cruising range of the vehicle is completed.

[0046] Among them, the set 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 s.

[0047] After the DS2 stage is completed, the driver drives the vehicle at a constant speed of 100 km / h in the CSSE stage according to the curve. If the vehicle cannot maintain 98 km / h for 4 s in the constant speed stage CSSE, the test should be stopped, and the test end button is clicked.

[0048] After the test is completed, the test data is checked and saved, the drum is locked, the current clamps are removed, the environmental chamber is turned off, and the test vehicle is removed from the drum, and the test is completed; After the test is completed, the vehicle is pushed into the 23℃ temperature preservation room for alternating current charging, and the alternating current charging data is recorded.

[0049] The recorded data is analyzed to determine the target cruising range of the vehicle in the CSSM stage.

[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 jth city test cycle shortened method based on the REESS power change amount, unit: watt-hour per kilometer (Wh / km); EC DC,city,j : the jth city test cycle shortened method based on the REESS power change amount, unit: watt-hour per kilometer (Wh / km); K city,j : the weight coefficient of the jth city test cycle of the initial test; ΔE REESS,city,1 : the power change amount of all REESS of the 1st city test cycle of the initial test, unit: watt-hour (Wh).

[0053] U(t) REESS,j,i : the voltage value of the REESS numbered j at time t in the time range of the ith speed interval, unit: volt (V); I(t) j，i : the current value of the REESS numbered j at time t in the time range of the ith speed interval, unit: ampere (A); ΔE REESSj，i : the power change amount of the REESS numbered j in the time range of the ith speed interval, unit: watt-hour (Wh) In some embodiments, the ratio of the power consumption of the vehicle in the CSSE stage and the total power consumption of the vehicle in the initial test is calculated; When the ratio is less than the set proportion threshold value, it is determined that the power consumption of the vehicle to be increased in the CSSM stage is 0; When the ratio is greater than the set proportion threshold value, the error between the ratio of the power consumption of the vehicle in the CSSE stage and the total power consumption of the vehicle in the initial test and the set proportion threshold value is calculated; the error multiplied by the total power consumption of the vehicle in the initial test is taken as the power consumption of the vehicle to be increased in the CSSM stage.

[0054] According to the regulation that the power consumption of the vehicle in the CSSE stage cannot be higher than 10% of the total power consumption of the vehicle in the initial test, the set proportion threshold value is selected as 10%.

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

[0056] The driving range of the vehicle to be increased in the CSSM stage is obtained by dividing the power consumption of the vehicle to be increased in the CSSM stage by the energy consumption rate of the CSSM stage.

[0057] The target driving range of the vehicle in the CSSM stage is determined by adding the increased driving range in the CSSM stage and the theoretical driving range in the CSSM stage.

[0058] The theoretical driving range of the CSSM stage in the theoretical operating curve is replaced by the target driving range, and the updating of the theoretical operating curve is realized.

[0059] Then, the energy consumption and driving test of the vehicle are performed by using the updated operating curve.

[0060] When the energy consumption and driving test of the vehicle is performed again, the driving range of each stage is obtained. The driving range of the vehicle is determined according to the driving range of each stage.

[0061] The driving range of the vehicle is equal to the sum of the driving range of the vehicle in the DS1 stage, the CSSM stage, the DS2 stage and the CSSE stage.

[0062] And a test report as shown in Figure 5 is generated.

[0063] The pure electric vehicle energy consumption and driving automatic test method provided by the embodiment of the application ensures the consistency of the energy consumption and driving test with the relevant provisions and the accuracy of the energy consumption and driving test by performing the energy consumption and driving initial test on the vehicle, updating the theoretical operating curve according to the initial test result, and then performing the energy consumption and driving test again on the vehicle by using the updated operating curve.

[0064] The embodiment of the application further provides a pure electric vehicle energy consumption and driving automatic test system, which comprises: The curve acquisition unit is configured to acquire the theoretical operating curve of the pure electric vehicle energy consumption and driving test. The control unit is configured to perform the energy consumption and driving test on the vehicle according to the theoretical operating curve and the updated operating curve. The data acquisition unit is configured to acquire the energy consumption, the driving range of the vehicle in the CSSM stage, the energy consumption, the driving range of the vehicle in the CSSE stage and the total energy consumption of the initial test vehicle. The curve updating unit is configured to determine an increased power consumption of the vehicle in the CSSM stage according to the power consumption of the vehicle in the CSSE stage and the total power consumption of the vehicle in the initial test; determine an energy consumption rate of the vehicle in the CSSM stage according to the range and the power consumption of the vehicle in the CSSM stage; determine an increased range of the vehicle in the CSSM stage according to the energy consumption rate of the vehicle in the CSSM stage and the increased power consumption of the vehicle in the CSSM stage; determine a target range of the vehicle in the CSSM stage according to the increased range of the vehicle in the CSSM stage and the theoretical range; and update the theoretical working condition curve according to the target range of the vehicle in the CSSM stage.

[0065] It should be noted that the above-mentioned embodiment provides a pure electric vehicle energy consumption and endurance automatic test system, which only uses the above-mentioned functional units for example to illustrate the vehicle energy consumption and endurance test, and in actual application, the above-mentioned functions can be distributed by different functional modules according to the needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above-described functions. In addition, the above-mentioned embodiment provides a pure electric vehicle energy consumption and endurance automatic test system and a pure electric vehicle energy consumption and endurance automatic test method, which belong to the same concept, and the specific implementation process is described in the method embodiment, which will not be repeated here.

[0066] In more embodiments, there are also provided: A computer device, comprising: a processor adapted to execute a computer program; a computer readable storage medium, the computer readable storage medium storing a computer program, the computer program being executed by the processor to implement the pure electric vehicle energy consumption and endurance automatic test method disclosed in the embodiment of the application.

[0067] A computer readable storage medium, the computer readable storage medium storing a computer program, the computer program being adapted to be loaded and executed by a processor to implement the pure electric vehicle energy consumption and endurance automatic test method disclosed in the embodiment of the application.

[0068] A computer program product, the computer program product comprising a computer program, the computer program being executed by a processor to implement the pure electric vehicle energy consumption and endurance automatic test method disclosed in the embodiment of the application.

[0069] The method disclosed by the embodiments of the present application can be directly embodied as hardware processor execution, or be executed by combination of hardware and software modules in the processor. The software module can be located in the storage medium in the art, such as random storage, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, register, etc. The storage medium is located in the storage, and the processor reads the information in the storage to combine the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0070] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments can be realized by electronic hardware or combination of computer software and electronic hardware. Whether the functions are executed in hardware or software mode depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0071] Although the specific embodiments of the present application are described above in combination with the drawings, it is not a limitation on the protection scope of the present application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the protection scope of the present application.

Claims

1. A method for testing the energy consumption and the driving range of a pure electric vehicle automatically, characterized in that, The method comprises the following steps: obtaining a theoretical working condition curve for pure electric vehicle energy consumption and driving range test; conducting a first test on the vehicle according to the theoretical working condition curve; obtaining the electric energy consumption of the vehicle in the CSSM stage, the driving range of the vehicle in the CSSM stage, the electric energy consumption of the vehicle in the CSSE stage, the driving range of the vehicle in the CSSE stage, and the total electric energy consumption of the vehicle in the first test; determining the electric energy consumption of the vehicle in the CSSM stage to be increased according to the electric energy consumption of the vehicle in the CSSE stage and the total electric energy consumption of the vehicle in the first test; determining the energy consumption rate of the CSSM stage according to the driving range of the vehicle in the CSSM stage and the electric energy consumption of the CSSM stage; determining the driving range of the vehicle in the CSSM stage to be increased according to the energy consumption rate of the CSSM stage and the electric energy consumption of the vehicle in the CSSM stage to be increased; determining the target driving range of the vehicle in the CSSM stage according to the driving range of the vehicle in the CSSM stage to be increased and the theoretical driving range of the vehicle; updating the theoretical working condition curve according to the target driving range of the vehicle in the CSSM stage; conducting a second test on the vehicle by using the updated working condition curve.

2. The method of claim 1, wherein the method is performed automatically. calculating the ratio of the electric energy consumption of the vehicle in the CSSE stage to the total electric energy consumption of the vehicle in the first test; when the ratio is less than a set proportion threshold, determining that the electric energy consumption of the vehicle in the CSSM stage to be increased is 0; when the ratio is greater than the set proportion threshold, calculating the error between the ratio of the electric energy consumption of the vehicle in the CSSE stage to the total electric energy consumption of the vehicle in the first test and the set proportion threshold; and multiplying the error by the total electric energy consumption of the vehicle in the first test to obtain the electric energy consumption of the vehicle in the CSSM stage to be increased.

3. The method of claim 1, wherein the method is performed automatically. The theoretical working condition curve is a driving range-speed curve, comprising a DS1 stage, a CSSM stage, a DS2 stage and a CSSE stage; the CSSM stage and the CSSE stage are both constant speed driving stages.

4. The method of claim 1, wherein the method is performed automatically.

4. The method of claim 1, wherein the method is performed automatically. When the vehicle cannot maintain a set target speed for a set time in the CSSE stage during the energy consumption and driving range test, it is determined that the energy consumption and driving range test is completed.

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 the vehicle in the CSSM stage is equal to the theoretical total driving range of the vehicle in the discharging stage minus the theoretical driving range of the vehicle in the DS1 stage, the theoretical driving range of the vehicle in the DS2 stage and the theoretical driving range of the vehicle in the CSSE stage.

6. The method of claim 1, wherein the method is a pure electric vehicle energy consumption and range automated testing method, characterized in that, During the second test on the vehicle, the driving range of each stage is obtained; the driving range of the vehicle is determined according to the driving range of each stage.

7. A pure electric vehicle energy consumption and endurance automated testing system, characterized in that, The method comprises the following steps: a curve obtaining unit is configured to obtain a theoretical working condition curve for pure electric vehicle energy consumption and driving range test; a control unit is configured to conduct energy consumption and driving range test on the vehicle according to the theoretical working condition curve and the updated working condition curve; a data obtaining unit is configured to obtain the electric energy consumption of the vehicle in the CSSM stage, the driving range of the vehicle in the CSSM stage, the electric energy consumption of the vehicle in the CSSE stage, the driving range of the vehicle in the CSSE stage, and the total electric energy consumption of the vehicle in the first test; a curve updating unit is configured to determine the electric energy consumption of the vehicle in the CSSM stage to be increased according to the electric energy consumption of the vehicle in the CSSE stage and the total electric energy consumption of the vehicle in the first test; determining the energy consumption rate of the CSSM stage according to the range and the amount of electric energy consumption of the CSSM stage; determining the increased range of the vehicle in the CSSM stage according to the energy consumption rate of the CSSM stage and the increased amount of electric energy consumption of the vehicle in the CSSM stage; determining the target range of the vehicle in the CSSM stage according to the increased range of the vehicle in the CSSM stage and the theoretical range; updating the theoretical driving cycle according to the target range of the vehicle in the CSSM stage.

8. An electronic device, comprising: The device comprises: a processor adapted to execute a computer program; a computer readable storage medium having a computer program stored therein, the computer program being executed by the processor to implement the method of any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, the computer program being adapted to be loaded and executed by the processor to implement the method of any one of claims 1-6.

10. A computer program product, characterised in that, The computer program product comprises a computer program, the computer program being executed by the processor to implement the method of any one of claims 1-6.

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