Method and device for testing normal-temperature driving range of electric vehicle based on road

Abstract

The invention discloses a method and a device for testing normal-temperature driving range of an electric vehicle based on a road. The method comprises the following steps: determining the normal-temperature driving maximum dischargeable capacity E of a power battery of a to-be-tested vehicle based on the normal-temperature driving maximum dischargeable capacity test of the to-be-tested vehicle; determining the constant-speed working condition power consumption EC1 of the to-be-tested vehicle based on the constant-speed working condition power consumption test of the to-be-tested vehicle; determining the variable-speed working condition power consumption EC2 of the to-be-tested vehicle based on the variable-speed working condition power consumption test of the to-be-tested vehicle; based on the E and the EC1, the driving range of the to-be-detected vehicle during constant-speed driving is determined; and based on E and EC2, determining the driving range of the to-be-detected vehicle during variable-speed driving. According to the method and the device, test conditions and boundaries are unified and constrained, the consistency and the comparability of road driving range test results are improved, and the vehicle driving range obtained through test is more fit with the real endurance level of the vehicle based on the v-a distribution and the power consumption weight of the CLTC-P standard working condition.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing technology, and in particular to a road-based electric vehicle normal-temperature driving range testing method, device, equipment and computer-readable storage medium. Background Art

[0002] Compared with the simulation test method based on chassis dynamometer and environmental chamber, conducting new energy vehicle range test on the road can more realistically reflect the vehicle's driving resistance and the transmission and loss of vehicle energy.

[0003] However, the actual road driving range is affected by many factors such as driving speed, ambient altitude, temperature, wind speed, road slope / adhesion, vehicle load, vehicle driving mode, air conditioning settings, SOC, battery health, etc. This results in large differences in test results, which cannot fully reflect the actual driving range of the vehicle, and the test results cannot be compared horizontally. Summary of the invention

[0004] The present application provides a road-based electric vehicle normal temperature driving range test method, device, equipment and computer-readable storage medium, which can solve the technical problems existing in the prior art that the test results have poor consistency and comparability, and cannot be compared horizontally and characterize the vehicle's actual driving range level.

[0005] In a first aspect, an embodiment of the present application provides a road-based electric vehicle normal temperature driving range test method, the road-based electric vehicle normal temperature driving range test method comprising:

[0006] Based on a normal temperature driving maximum discharge capacity test of the vehicle to be tested, determining a normal temperature driving maximum discharge capacity E of the power battery of the vehicle to be tested;

[0007] Based on the constant speed operating condition power consumption test of the vehicle to be tested, determine the constant speed operating condition power consumption EC1 of the vehicle to be tested;

[0008] Based on the speed-changing operating condition power consumption test of the vehicle to be tested, the speed-changing operating condition power consumption EC2 of the vehicle to be tested is determined based on the Va distribution and power consumption weight of the CLTC-P standard operating condition;

[0009] Based on E and EC1, determine the driving range of the vehicle under test when traveling at a constant speed;

[0010] Based on E and EC2, the driving range of the vehicle under test when changing speed is determined.

[0011] In combination with the first aspect, in one embodiment, the step of determining the speed-changing operating condition power consumption EC2 of the vehicle to be tested based on the speed-changing operating condition power consumption test performed on the vehicle to be tested includes:

[0012] Based on the speed-changing working condition power consumption test conducted on the vehicle to be tested, sampling data at each sampling moment in the speed-changing working condition power consumption test is obtained, and the sampling data includes speed value, acceleration value and power battery power;

[0013] If the speed value and acceleration included in the sampled data are in the effective speed-acceleration sub-interval of the CLTC-P standard working condition, the sampled data is placed in a data set corresponding to the effective speed-acceleration sub-interval of the CLTC-P standard working condition, wherein the effective speed-acceleration sub-interval of the CLTC-P standard working condition corresponds to a speed range and an acceleration range;

[0014] When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrated and summed to obtain the total mileage, and the power battery power contained in the data set is integrated and summed to obtain the total power battery energy consumption;

[0015] Based on the total mileage and total power battery energy consumption corresponding to each data set, the power consumption corresponding to each data set is obtained;

[0016] The power consumption corresponding to all data sets is combined to obtain the power consumption EC2 of the speed change condition of the vehicle to be tested.

[0017] In combination with the first aspect, in one embodiment, the sampled data further includes low-voltage accessory power and motor controller power. When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrally summed to obtain the total mileage, and the power battery power contained in the data set is integrally summed to obtain the total power battery energy consumption step, before the step, the method further includes:

[0018] For each data set, the sampled data corresponding to the maximum and minimum values ​​of the low-voltage accessory power are deleted, and the sampled data corresponding to the maximum and minimum values ​​of the motor controller power are deleted.

[0019] In combination with the first aspect, in one embodiment, the step of synthesizing the power consumption corresponding to all data sets to obtain the power consumption EC2 of the speed change condition of the vehicle to be tested includes:

[0020] The power consumption corresponding to all data sets is weightedly summed to obtain the power consumption EC2 of the power battery of the vehicle under test in the variable speed condition.

[0021] In combination with the first aspect, in one embodiment, for any data set D i , dataset D i The corresponding weight r i Determined by the weight calculation formula, the weight calculation formula is:

[0022]

[0023] Where C is the total number of drop points under CLTC-P standard working condition, 1800, m i is the second-by-second speed-acceleration of the CLTC-P standard condition in data set D i The number of points in the effective speed-acceleration sub-interval of the corresponding CLTC-P standard working condition.

[0024] In a second aspect, an embodiment of the present application provides a road-based electric vehicle normal temperature driving range test device, the road-based electric vehicle normal temperature driving range test device comprising:

[0025] A first determination module is used to determine the maximum discharge capacity E of the power battery of the vehicle to be tested during normal temperature driving based on a maximum discharge capacity test of the vehicle to be tested during normal temperature driving;

[0026] A second determination module is used to determine the constant speed working condition power consumption EC1 of the vehicle to be tested based on the constant speed working condition power consumption test performed on the vehicle to be tested;

[0027] A third determination module is used to determine the speed change condition power consumption EC2 of the vehicle to be tested based on the speed change condition power consumption test performed on the vehicle to be tested;

[0028] A fourth determination module is used to determine the driving range of the vehicle to be tested when it is traveling at a constant speed based on E and EC1;

[0029] The fifth determination module is used to determine the cruising range of the vehicle to be tested when the vehicle is changing speed based on E and EC2.

[0030] In conjunction with the second aspect, in one embodiment, the third determining module is configured to:

[0031] Based on the speed-changing working condition power consumption test conducted on the vehicle to be tested, sampling data at each sampling moment in the speed-changing working condition power consumption test is obtained, and the sampling data includes speed value, acceleration value and power battery power;

[0032] If the speed value and acceleration included in the sampled data are in the effective speed-acceleration sub-interval of the CLTC-P standard working condition, the sampled data is placed in a data set corresponding to the effective speed-acceleration sub-interval of the CLTC-P standard working condition, wherein the effective speed-acceleration sub-interval of the CLTC-P standard working condition corresponds to a speed range and an acceleration range;

[0033] When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrated and summed to obtain the total mileage, and the power battery power contained in the data set is integrated and summed to obtain the total power battery energy consumption;

[0034] Based on the total mileage and total power battery energy consumption corresponding to each data set, the power consumption corresponding to each data set is obtained;

[0035] The power consumption corresponding to all data sets is combined to obtain the power consumption EC2 of the speed change condition of the vehicle to be tested.

[0036] In conjunction with the second aspect, in one embodiment, the test data further includes low-voltage accessory power and motor controller power, and the road-based electric vehicle normal temperature driving range test device further includes a deletion module for:

[0037] For each data set, the sampled data corresponding to the maximum and minimum values ​​of the low-voltage accessory power are deleted, and the sampled data corresponding to the maximum and minimum values ​​of the motor controller power are deleted.

[0038] In a third aspect, an embodiment of the present application provides a road-based electric vehicle normal-temperature driving range test device, the road-based electric vehicle normal-temperature driving range test device comprising a processor, a memory, and a road-based electric vehicle normal-temperature driving range test program stored on the memory and executable by the processor, wherein when the road-based electric vehicle normal-temperature driving range test program is executed by the processor, the steps of the road-based electric vehicle normal-temperature driving range test method as described in the first aspect are implemented.

[0039] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a road-based electric vehicle normal-temperature driving range test program is stored. When the road-based electric vehicle normal-temperature driving range test program is executed by a processor, the steps of the road-based electric vehicle normal-temperature driving range test method described in the first aspect are implemented.

[0040] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0041] In the embodiment of the present application, based on the maximum discharge capacity test of the vehicle under test at normal temperature, the maximum discharge capacity E of the power battery of the vehicle under test at normal temperature is determined; based on the constant speed working condition power consumption test of the vehicle under test, the constant speed working condition power consumption EC1 of the vehicle under test is determined; based on the variable speed working condition power consumption test of the vehicle under test, the variable speed working condition power consumption EC2 of the vehicle under test is determined; based on E and EC1, the driving range of the vehicle under test at constant speed is determined; based on E and EC2, the driving range of the vehicle under test at variable speed is determined. Through the embodiment of the present application, the test conditions and boundaries are unified and constrained, the consistency and comparability of the road driving range test results are improved, and based on the va distribution and power consumption weight of the CLTC-P standard working condition, the vehicle driving range obtained through the test is more consistent with the actual endurance level of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a flow chart of an embodiment of a road-based electric vehicle normal temperature driving range test method of the present application;

[0043] Figure 2 for Figure 1 Detailed flow chart of step S30;

[0044] Figure 3 This is a functional module diagram of an embodiment of a road-based electric vehicle normal temperature driving range test device of the present application;

[0045] Figure 4 This is a schematic diagram of the hardware structure of a road-based electric vehicle normal temperature driving range test device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] In a first aspect, an embodiment of the present application provides a road-based method for testing the normal-temperature driving range of an electric vehicle.

[0049] In one embodiment, referring to Figure 1 , Figure 1This is a flow chart of an embodiment of a method for testing the normal temperature driving range of an electric vehicle based on a road in this application. Figure 1 As shown in the figure, the road-based electric vehicle normal temperature driving range test method includes:

[0050] Step S10, determining the maximum discharge capacity E of the power battery of the vehicle under test during normal temperature driving based on a normal temperature driving maximum discharge capacity test performed on the vehicle under test;

[0051] In this embodiment, before the vehicle to be tested is subjected to the maximum discharge capacity test under normal temperature driving, the power consumption test under constant speed condition, and the power consumption test under variable speed condition, the vehicle to be tested has the following requirements:

[0052] The mileage of the vehicle to be tested is greater than 500km;

[0053] The power battery of the vehicle to be tested has completed at least one complete charge and discharge;

[0054] The state of available energy SOCE of the power battery of the vehicle to be tested is greater than 98%.

[0055] Secondly, during the test of the maximum discharge capacity under normal temperature driving, the power consumption test under constant speed condition, and the power consumption test under variable speed condition, the following requirements are imposed on the test environment and site:

[0056] The ambient temperature during the test was between 23±5℃.

[0057] During the entire test period, the average wind speed in 5 s was less than 2 m / s, and the peak wind speed in 2 s was less than 4 m / s;

[0058] The altitude of the test site shall not exceed 500m.

[0059] The roads at the test site should be flat, clean, and dry, and the geological composition of the roads should represent the current typical urban roads and highway pavements;

[0060] The longitudinal slope of the road shall not exceed ±1%, and the slope difference of any 3m on the test road shall not exceed 0.5%.

[0061] Secondly, before conducting the maximum discharge capacity test at normal temperature, the power consumption test under constant speed condition and the power consumption test under variable speed condition on the vehicle to be tested, the following preparations are also required:

[0062] Arrange current sensors and voltage sensors on the power battery busbar, electric machine controller and DCDC output terminal of the vehicle to be tested, install GPS speed sensor and acceleration sensor on the top of the vehicle to be tested, install temperature sensor inside the vehicle to be tested, and connect the above sensors to data acquisition equipment to synchronously collect data collected by each sensor during the test and related data on the vehicle CAN;

[0063] Adjust the tire pressure of the vehicle according to relevant requirements and load the vehicle. The difference between the loaded vehicle mass (including test equipment and personnel) and the test mass required by the standard is within 25kg;

[0064] Arrange an ambient temperature and wind speed test meteorological station at a certain height beside the test road.

[0065] Before testing the maximum discharge capacity of the vehicle under test at normal temperature, fully charge the vehicle according to relevant requirements; the maximum discharge capacity test of the vehicle under test at normal temperature is as follows:

[0066] The vehicle first accelerates to 100km / h and then drives on the test site road at a constant speed of 100±2km / h until the speed can no longer be maintained at 90km / h, at which time the test is stopped.

[0067] During the entire test phase, the current I and voltage U of the power battery busbar are collected in real time, and the maximum discharge capacity E of the power battery of the vehicle under test at normal temperature is calculated according to the following formula:

[0068]

[0069] Among them, 0 is the revelation time of the maximum discharge capacity test at normal temperature, t end This is the end time of the maximum discharge capacity test under normal temperature driving.

[0070] It is easy to understand that the specific numerical values ​​listed in the above and following descriptions are only for illustrative purposes, and are intended to enable readers to more clearly understand the embodiments of the present application, and do not constitute a limitation on the embodiments of the present application.

[0071] Step S20, determining the constant speed operating condition power consumption E1 of the power battery of the vehicle to be tested based on the constant speed operating condition power consumption test performed on the vehicle to be tested;

[0072] In this embodiment, the constant speed condition power consumption test of the vehicle to be tested is described as follows:

[0073] Before conducting a constant speed power consumption test on the vehicle to be tested, the vehicle's power should be adjusted to complete the entire constant speed power consumption test; during the constant speed power consumption test on the vehicle to be tested, the air conditioner of the vehicle to be tested remains turned off, and the opening of other low-voltage accessories remains consistent with actual driving.

[0074] The vehicle to be tested completes the power consumption test under various constant speed conditions according to the set constant speed and duration requirements. First, accelerate to a constant speed v, and then drive on the road of the test site at a constant speed of v±2km / h. After maintaining the constant speed for 30 minutes, stop the test.

[0075] During the entire test phase, the current, voltage and other data of the power battery busbar are collected in real time, and the constant speed power consumption EC1 of the power battery of the vehicle to be tested is calculated according to the following formula:

[0076]

[0077] Among them, based on the current and voltage of the power battery bus collected in real time during the test phase, refer to the formula for calculating E to calculate E. const_speed ;D const_speed It is the total mileage of the vehicle under test in the constant speed power consumption test.

[0078] Step S30, determining the speed-changing condition power consumption EC2 of the power battery of the vehicle to be tested based on the speed-changing condition power consumption test performed on the vehicle to be tested;

[0079] In this embodiment, before the speed shifting power consumption test is carried out on the vehicle to be tested, the battery level of the vehicle should be adjusted to complete the entire speed shifting power consumption test, but shall not be higher than 90% of the total SOC; during the speed shifting power consumption test on the vehicle to be tested, the air conditioner of the vehicle to be tested shall remain turned off, and the activation of other low-voltage accessories shall remain consistent with that during actual driving.

[0080] After the above preparations are completed, the vehicle is controlled to change speed on the test site road, and the speed change condition power consumption EC2 of the power battery of the vehicle to be tested is determined based on the data collected in real time by the sensor during the test.

[0081] Further, in one embodiment, referring to Figure 2 , Figure 2 for Figure 1 Detailed flow chart of step S30 in FIG. Figure 2 As shown, step S30 includes:

[0082] Step S301, based on the speed-changing working condition power consumption test performed on the vehicle to be tested, obtaining sampling data at each sampling moment during the speed-changing working condition power consumption test, the sampling data including speed value, acceleration value and power battery power;

[0083] In this embodiment, during the speed change condition power consumption test of the vehicle to be tested, the speed value, acceleration value and power battery power of the vehicle to be tested are sampled in real time, so that the sampling data at each sampling moment can be obtained.

[0084] Step S302, if the speed value and acceleration included in the sampled data are in the effective speed-acceleration sub-interval of the CLTC-P standard working condition, the sampled data is placed in a data set corresponding to the effective speed-acceleration sub-interval of the CLTC-P standard working condition, wherein the effective speed-acceleration sub-interval of the CLTC-P standard working condition corresponds to a speed range and an acceleration range;

[0085] In this embodiment, the effective speed-acceleration sub-interval of the CLTC-P standard working condition is determined as follows: the speed sub-interval is divided into intervals of 2 km / h in the speed range of 0-116 km / h, and the acceleration sub-interval is divided into intervals of 0.1 m / s^2 in the speed range of -2.0-2.0 m / s^2. Each speed sub-interval and acceleration sub-interval constitutes a preliminary sub-interval of va distribution, and the preliminary sub-interval of va distribution is defined as ([v1, v2], [a1, a2]).

[0086] The va of the CLTC-P standard working condition is counted second by second. When the va meets the following requirements:

[0087] v1≤v<v2 and a1≤a<a2, then ([v1, v2], [a1, a2]) is a valid speed-acceleration sub-interval of the CLTC-P standard working condition.

[0088] Based on this, the sampled data can be put into the data set corresponding to the effective speed-acceleration sub-interval of the corresponding CLTC-P standard working condition.

[0089] Step S303: when the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrated and summed to obtain the total mileage, and the power battery power contained in the data set is integrated and summed to obtain the total power battery energy consumption;

[0090] In this embodiment, assuming that there are 100 valid speed-acceleration sub-intervals in the CLTC-P standard working condition, subsequent actions are performed only when the number of sampled data in the 100 data sets corresponding to the 100 valid speed-acceleration sub-intervals is greater than the preset value, thereby ensuring the consistency and comparability of the road driving range test results. The preset value is set according to actual needs, for example, set to 10.

[0091] Referring to the above description, for a data set, if 15 sample data are put into the data set, the data set contains 15 speed values ​​and 15 power battery powers. Then the 15 speed values ​​are integrated and summed to get the total mileage; the 15 power battery powers are summed to get the total power battery power. Similarly, the total mileage and total power battery power corresponding to each data set can be obtained. Specifically, the total mileage d of data set k can be calculated by the following formula: array , k And the total energy consumption of the power battery:

[0092]

[0093] The data set k contains j mileages, i.e., d1 to d j , 1 / 1000 is used for unit conversion.

[0094]

[0095] Among them, data set k contains j power batteries, that is, P hv,1 To P hv,j , 1 / 3600 is used for unit conversion.

[0096] Mileage i And the power battery power P hv , i Calculated by the following formula:

[0097]

[0098] Among them, v i is the speed at sampling time i, v i-1 is the velocity at the previous sampling moment, v i is the timestamp of sampling time i, t i-1 The timestamp of the previous sampling moment.

[0099] P hv , i =U hv , i ×I hv , i

[0100] Among them, U hv , i is the voltage of the power battery bus corresponding to the sampling time i, in V, I hv , i is the current of the power battery bus corresponding to the sampling time i, in A.

[0101] Furthermore, in one embodiment, the sampled data also includes low voltage accessory power and motor controller power, and before step S303, it also includes:

[0102] For each data set, the sampled data corresponding to the maximum and minimum values ​​of the low-voltage accessory power are deleted, and the sampled data corresponding to the maximum and minimum values ​​of the motor controller power are deleted.

[0103] In this embodiment, the low-voltage accessory power P at sampling time i during the power consumption test under speed change condition is lv,i And the motor controller power P dm,i Calculated by the following formula:

[0104] P lv,i =U lv,i ×Ilv,i

[0105] Among them, U lv,i is the voltage of the low-voltage accessory corresponding to the sampling time i, generally the voltage output by the DCDC, in V; I lv,i It is the total current consumed by the low-voltage accessories corresponding to the sampling time i, generally the current output by the DCDC, in A.

[0106] P dm,i =U dm,i ×I dm,i

[0107] Among them, U dm,i is the voltage of the motor controller bus corresponding to the sampling time i, in V; I dm,i is the current of the motor controller bus corresponding to the sampling time i, in A.

[0108] For each data set, by deleting the sampling data corresponding to the maximum value of the low-voltage accessory power, the sampling data corresponding to the minimum value of the low-voltage accessory power, the sampling data corresponding to the maximum value of the motor controller power, and the sampling data corresponding to the minimum value of the motor controller power in the data set, the interference of these sampling data on the final result can be reduced.

[0109] Step S304, obtaining the power consumption corresponding to each data set based on the total mileage corresponding to each data set and the total power battery energy consumption;

[0110] In this embodiment, the power consumption EC corresponding to the data set k is array,k Calculated by the following formula:

[0111]

[0112] And so on, the power consumption corresponding to each data set can be obtained.

[0113] Step S305 , combining the power consumption corresponding to all data sets to obtain the power consumption EC2 of the power battery of the vehicle under test in the gear shifting condition.

[0114] In this embodiment, based on the power consumption corresponding to all data sets, the power consumption EC2 of the power battery of the vehicle to be tested under the speed change condition can be obtained through a specific calculation method.

[0115] Furthermore, in one embodiment, step S305 includes:

[0116] The power consumption corresponding to all data sets is weightedly summed to obtain the power consumption EC2 of the power battery of the vehicle under test in the variable speed condition.

[0117] In this embodiment, the weighted sum of the power consumption corresponding to all data sets is calculated according to the following formula:

[0118]

[0119] Where n is the number of data sets, R array,k is the weight of the dataset k.

[0120] It should be noted that any data set k corresponds to a va interval. Therefore, the weight corresponding to each va interval can be set in advance based on the specific value of each va interval and used as the weight of the corresponding data set k.

[0121] Furthermore, in one embodiment, for any data set D i , dataset D i The corresponding weight R i Determined by the weight calculation formula, the weight calculation formula is:

[0122]

[0123] Where C is the total number of drop points under CLTC-P standard working condition, 1800, m i is the second-by-second speed-acceleration of the CLTC-P standard condition in data set D i The number of points in the effective speed-acceleration sub-interval of the corresponding CLTC-P standard working condition.

[0124] In this embodiment, under the CLTC-P standard working condition, a set of speeds and accelerations falls within a valid speed-acceleration sub-interval, that is, each valid speed-acceleration sub-interval has a corresponding number of landing points, and the sum of the number of landing points corresponding to all valid speed-acceleration sub-intervals is the total number of landing points C of the CLTC-P standard working condition.

[0125] For example, the second-by-second speed-acceleration of the CLTC-P standard condition is in data set D i The number of points in the corresponding effective velocity-acceleration subinterval is 18, so the data set D i The corresponding weight R i is 0.01.

[0126] By analogy, the weight corresponding to each data set can be determined.

[0127] Step S40, based on E and EC1, determining the driving range of the vehicle to be tested when traveling at a constant speed;

[0128] In this embodiment, the driving range R of the vehicle under test when traveling at a constant speed is calculated by the following formula: const_speed :

[0129]

[0130] Step S50, based on E and EC2, determining the driving range of the vehicle to be tested when the vehicle is changing speed.

[0131] In this embodiment, the driving range R of the vehicle to be tested when the speed is changed is calculated by the following formula: cycle_speed :

[0132]

[0133] In the embodiment of the present application, based on the maximum discharge capacity test of the vehicle under test at normal temperature, the maximum discharge capacity E of the power battery of the vehicle under test at normal temperature is determined; based on the constant speed working condition power consumption test of the vehicle under test, the constant speed working condition power consumption EC1 of the vehicle under test is determined; based on the variable speed working condition power consumption test of the vehicle under test, the variable speed working condition power consumption EC2 of the vehicle under test is determined; based on E and EC1, the driving range of the vehicle under test at constant speed is determined; based on E and EC2, the driving range of the vehicle under test at variable speed is determined. Through this application, the test conditions and boundaries are unified and constrained, the consistency and comparability of the road driving range test results are improved, and based on the va distribution and power consumption weight of the CLTC-P standard working condition, the vehicle driving range obtained through the test is more consistent with the actual endurance level of the vehicle.

[0134] In a second aspect, an embodiment of the present application also provides a road-based electric vehicle normal temperature driving range test device.

[0135] In one embodiment, referring to Figure 3 , Figure 3 This is a functional module diagram of an embodiment of a road-based electric vehicle normal temperature driving range test device. Figure 3 As shown, the road-based electric vehicle normal temperature driving range test device includes:

[0136] A first determination module 10 is used to determine the maximum discharge capacity E of the power battery of the vehicle under test during normal temperature driving based on a maximum discharge capacity test of the vehicle under test during normal temperature driving;

[0137] The second determination module 20 is used to determine the constant speed condition power consumption EC1 of the vehicle to be tested based on the constant speed condition power consumption test performed on the vehicle to be tested;

[0138] A third determination module 30 is used to determine the speed change condition power consumption EC2 of the vehicle to be tested based on the speed change condition power consumption test performed on the vehicle to be tested;

[0139] A fourth determination module 40 is used to determine the driving range of the vehicle to be tested when traveling at a constant speed based on E and EC1;

[0140] The fifth determination module 50 is used to determine the driving range of the vehicle under test when the vehicle is changing speed based on E and EC2.

[0141] Furthermore, in one embodiment, the third determining module 30 is configured to:

[0142] Based on the speed-changing working condition power consumption test conducted on the vehicle to be tested, sampling data at each sampling moment in the speed-changing working condition power consumption test is obtained, and the sampling data includes speed value, acceleration value and power battery power;

[0143] If the speed value and acceleration included in the sampled data are in the effective speed-acceleration sub-interval of the CLTC-P standard working condition, the sampled data is placed in a data set corresponding to the effective speed-acceleration sub-interval of the CLTC-P standard working condition, wherein the effective speed-acceleration sub-interval of the CLTC-P standard working condition corresponds to a speed range and an acceleration range;

[0144] When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrated and summed to obtain the total mileage, and the power battery power contained in the data set is integrated and summed to obtain the total power battery energy consumption;

[0145] Based on the total mileage and total power battery energy consumption corresponding to each data set, the power consumption corresponding to each data set is obtained;

[0146] The power consumption corresponding to all data sets is combined to obtain the power consumption EC2 of the speed change condition of the vehicle to be tested.

[0147] Furthermore, in one embodiment, the test data also includes low-voltage accessory power and motor controller power, and the road-based electric vehicle normal temperature driving range test device also includes a deletion module for:

[0148] For each data set, the sampled data corresponding to the maximum and minimum values ​​of the low-voltage accessory power are deleted, and the sampled data corresponding to the maximum and minimum values ​​of the motor controller power are deleted.

[0149] Furthermore, in one embodiment, the third determining module 30 is configured to:

[0150] The power consumption corresponding to all data sets is weightedly summed to obtain the power consumption EC2 of the power battery of the vehicle under test in the variable speed condition.

[0151] Furthermore, in one embodiment, for any data set D i , dataset D i The corresponding weight R i Determined by the weight calculation formula, the weight calculation formula is:

[0152]

[0153] Where C is the total number of drop points under CLTC-P standard working condition, 1800, m i is the second-by-second speed-acceleration of the CLTC-P standard condition in data set D i The number of points in the effective speed-acceleration sub-interval of the corresponding CLTC-P standard working condition.

[0154] Among them, the functional implementation of each module in the above-mentioned road-based electric vehicle normal temperature driving range test device corresponds to the various steps in the above-mentioned road-based electric vehicle normal temperature driving range test method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0155] On the third aspect, an embodiment of the present application provides a road-based electric vehicle normal temperature driving range test device. The road-based electric vehicle normal temperature driving range test device can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0156] Reference Figure 4 , Figure 4 The schematic diagram of the hardware structure of the road-based electric vehicle normal temperature driving range test device involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the road-based electric vehicle normal temperature driving range test device may include a processor, a memory, a communication interface, and a communication bus.

[0157] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0158] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the road-based electric vehicle normal temperature driving range test equipment, and the interface used to realize the interconnection between the road-based electric vehicle normal temperature driving range test equipment and other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0159] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0160] The processor may be a general-purpose processor, which may call a road-based electric vehicle normal temperature driving range test program stored in a memory, and execute a road-based electric vehicle normal temperature driving range test method provided in an embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the road-based electric vehicle normal temperature driving range test program is called may refer to the various embodiments of the road-based electric vehicle normal temperature driving range test method of the present application, which will not be repeated here.

[0161] Those skilled in the art will understand that Figure 4 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0162] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0163] The computer-readable storage medium of the present application stores a road-based electric vehicle normal-temperature driving range test program, wherein when the road-based electric vehicle normal-temperature driving range test program is executed by a processor, the steps of the road-based electric vehicle normal-temperature driving range test method as described above are implemented.

[0164] Among them, the method implemented when the road-based electric vehicle normal temperature driving range test program is executed can refer to the various embodiments of the road-based electric vehicle normal temperature driving range test method of the present application, and will not be repeated here.

[0165] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0166] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0167] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0168] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0169] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0170] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0171] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A road-based electric vehicle normal temperature driving range test method, characterized in that: The road-based electric vehicle normal temperature driving range test method includes: Based on a normal temperature driving maximum discharge capacity test of the vehicle to be tested, determining a normal temperature driving maximum discharge capacity E of the power battery of the vehicle to be tested; Based on the constant speed operating condition power consumption test of the vehicle to be tested, determine the constant speed operating condition power consumption EC1 of the vehicle to be tested; Based on the speed change condition power consumption test of the vehicle to be tested, determine the speed change condition power consumption EC2 of the vehicle to be tested; Based on E and EC1, determine the driving range of the vehicle under test when traveling at a constant speed; Based on E and EC2, the driving range of the vehicle under test when changing speed is determined.

2. The method for testing the normal temperature driving range of an electric vehicle based on a road as claimed in claim 1, characterized in that: The step of determining the speed-changing operating condition power consumption EC2 of the vehicle to be tested based on the speed-changing operating condition power consumption test of the vehicle to be tested comprises: Based on the speed-changing working condition power consumption test conducted on the vehicle to be tested, sampling data at each sampling moment in the speed-changing working condition power consumption test is obtained, and the sampling data includes speed value, acceleration value and power battery power; If the speed value and acceleration included in the sampled data are in the effective speed-acceleration sub-interval of the CLTC-P standard working condition, the sampled data is placed in a data set corresponding to the effective speed-acceleration sub-interval of the CLTC-P standard working condition, wherein the effective speed-acceleration sub-interval of the CLTC-P standard working condition corresponds to a speed range and an acceleration range; When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrated and summed to obtain the total mileage, and the power battery power contained in the data set is integrated and summed to obtain the total power battery energy consumption; Based on the total mileage and total power battery energy consumption corresponding to each data set, the power consumption corresponding to each data set is obtained; The power consumption corresponding to all data sets is combined to obtain the power consumption EC2 of the speed change condition of the vehicle to be tested.

3. The road-based normal temperature driving range test method for electric vehicles according to claim 2, characterized in that: The sampled data also includes low-voltage accessory power and motor controller power. When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrally summed to obtain the total mileage, and the power battery power contained in the data set is integrally summed to obtain the total power battery energy consumption step, before the step, the method further includes: For each data set, the sampled data corresponding to the maximum and minimum values ​​of the low-voltage accessory power are deleted, and the sampled data corresponding to the maximum and minimum values ​​of the motor controller power are deleted.

4. The method for testing the normal temperature driving range of an electric vehicle based on a road as claimed in claim 2, characterized in that: The step of synthesizing the power consumption corresponding to all data sets to obtain the power consumption EC2 of the vehicle under test under the speed change condition comprises: The power consumption corresponding to all data sets is weightedly summed to obtain the power consumption EC2 of the power battery of the vehicle under test in the variable speed condition.

5. The method for testing the normal temperature driving range of an electric vehicle based on a road as claimed in claim 4, characterized in that: For any dataset D i , dataset D i The corresponding weight R i Determined by the weight calculation formula, the weight calculation formula is: Where C is the total number of drop points under CLTC-P standard working condition, 1800, m i is the second-by-second speed-acceleration of the CLTC-P standard condition in data set D i The number of points in the effective speed-acceleration sub-interval of the corresponding CLTC-P standard working condition.

6. A road-based electric vehicle normal temperature driving range test device, characterized in that: The road-based electric vehicle normal temperature driving range test device comprises: A first determination module is used to determine the maximum discharge capacity E of the power battery of the vehicle to be tested during normal temperature driving based on a maximum discharge capacity test of the vehicle to be tested during normal temperature driving; A second determination module is used to determine the constant speed working condition power consumption EC1 of the vehicle to be tested based on the constant speed working condition power consumption test performed on the vehicle to be tested; A third determination module is used to determine the speed change condition power consumption EC2 of the vehicle to be tested based on the speed change condition power consumption test performed on the vehicle to be tested; A fourth determination module is used to determine the driving range of the vehicle to be tested when it is traveling at a constant speed based on E and EC1; The fifth determination module is used to determine the cruising range of the vehicle to be tested when the vehicle is changing speed based on E and EC2.

7. The road-based electric vehicle normal temperature driving range test device as claimed in claim 6, characterized in that: The third determination module is used to: Based on the speed-changing working condition power consumption test conducted on the vehicle to be tested, sampling data at each sampling moment in the speed-changing working condition power consumption test is obtained, and the sampling data includes speed value, acceleration value and power battery power; If the speed value and acceleration included in the sampled data are in the effective speed-acceleration sub-interval of the CLTC-P standard working condition, the sampled data is placed in a data set corresponding to the effective speed-acceleration sub-interval of the CLTC-P standard working condition, wherein the effective speed-acceleration sub-interval of the CLTC-P standard working condition corresponds to a speed range and an acceleration range; When the number of sampled data in the data set corresponding to the effective speed-acceleration sub-intervals of all CLTC-P standard working conditions is greater than a preset value, for each data set, the speed values ​​contained in the data set are integrated and summed to obtain the total mileage, and the power battery power contained in the data set is integrated and summed to obtain the total power battery energy consumption; Based on the total mileage and total power battery energy consumption corresponding to each data set, the power consumption corresponding to each data set is obtained; The power consumption corresponding to all data sets is combined to obtain the power consumption EC2 of the speed change condition of the vehicle to be tested.

8. The road-based electric vehicle normal temperature driving range test device as claimed in claim 7, characterized in that: The test data also includes low voltage accessory power and motor controller power. The road-based electric vehicle normal temperature driving range test device also includes a deletion module for: For each data set, the sampled data corresponding to the maximum and minimum values ​​of the low-voltage accessory power are deleted, and the sampled data corresponding to the maximum and minimum values ​​of the motor controller power are deleted.

9. A road-based electric vehicle normal temperature driving range test equipment, characterized in that: The road-based electric vehicle normal temperature driving range test equipment includes a processor, a memory, and a road-based electric vehicle normal temperature driving range test program stored in the memory and executable by the processor, wherein when the road-based electric vehicle normal temperature driving range test program is executed by the processor, the steps of the road-based electric vehicle normal temperature driving range test method as described in any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a road-based electric vehicle normal-temperature driving range test program, wherein when the road-based electric vehicle normal-temperature driving range test program is executed by a processor, the steps of the road-based electric vehicle normal-temperature driving range test method as described in any one of claims 1 to 5 are implemented.

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