CN112444750B - Rapid test method for driving range of electric automobile - Google Patents
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- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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Abstract
The invention provides a method for rapidly testing driving mileage of an electric automobile, which comprises the following steps: s1, testing the charge and discharge of an automobile to ensure that a power battery of the automobile is in a stable state; s2, selecting a correct driving mode for reasonably evaluating a driving range result of the electric automobile; s3, creating test working conditions, including division of speed fragments, speed setting and mileage setting; s4, calculating a result of the driving range, and calculating the driving range according to a related formula. The method for rapidly testing the driving range of the electric automobile can greatly shorten the testing period of the driving range of the electric automobile. Through calculation, the test time used by the method for rapidly evaluating the driving range of the electric automobile is more than 50% shorter than that used by the conventional method.
Description
Technical Field
The invention belongs to the technical field of electric vehicle driving range testing, and particularly relates to a method for rapidly testing driving range of an electric vehicle.
Background
The driving range is a very important technical and performance index for evaluating the electric automobile. The driving range of the electric automobile reflects the distance which the electric automobile can travel until the available electric quantity is the lowest after the electric automobile is fully charged and according to a certain test working condition. The current national regulation adopts the standard GB/T18386-2017 electric automobile energy consumption rate and range test method to test the range of the electric automobile. The testing method specified in the standard is based on NEDC working conditions, the vehicle starts from full power, the NEDC working conditions are repeatedly operated on the chassis dynamometer until the available electric quantity of the vehicle is the lowest, and the distance travelled by the vehicle is calculated through the data acquisition system and is the driving mileage of the electric vehicle.
The test method converts the electric quantity in the battery into vehicle mileage by repeatedly and repeatedly operating NEDC working conditions. The NEDC working condition operated by the method has average speed per hour of 33.64km/h, and the electric vehicle has longer and longer driving range and more vehicles with high driving range along with the continuous development of electric vehicle technology development and battery technology and continuous breakthrough of battery capacity technology. The problem is that the test period becomes longer and longer, and the test errors in the test process accumulate along with the increase of the test time, so that the test result is affected to some extent. The vehicle range consistency results are more significantly affected.
Disclosure of Invention
In view of the above, the invention aims to provide a rapid test method for the driving range of an electric automobile, so as to solve the problems of long test period and inaccurate test result when the driving range is tested based on the existing NEDC working condition.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a method for rapidly testing the driving range of an electric automobile comprises the following steps:
s1, testing the charge and discharge of an automobile to ensure that a power battery of the automobile is in a stable state;
s2, selecting a correct driving mode for reasonably evaluating a driving range result of the electric automobile;
s3, creating test working conditions, including division of speed fragments, speed setting and mileage setting;
s4, calculating a result of the driving range, and calculating the driving range according to a related formula.
Further, in the step S1, the test of the charging and discharging of the automobile includes:
the REESS discharges, and the REESS is ensured to discharge to the lowest value of the SOC;
the REESS is charged conventionally, and the REESS is charged at the ambient temperature of 23+/-3 ℃ in the following way until the charging is finished:
if the vehicle-mounted charger is installed, charging by adopting the vehicle-mounted charger; otherwise, the external charger is suggested by the automobile manufacturing enterprises.
Further, the condition for judging the end of charging is:
when the vehicle-mounted or external instrument displays that the REESS is fully charged, judging that the charging is completed;
if the vehicle or external instrument signals that the REESS is not full, the longest charging time is in this case: 3 x REESS energy (kWh)/Power supply (kW) specified by the automobile manufacturing company.
Further, in the step S2, the method for selecting the driving mode includes:
if there is a primary mode in which the vehicle is able to follow the test cycle during the test, then selecting that mode;
if there is no primary mode, or a primary mode, but the primary mode does not enable the vehicle to follow the test cycle during the test, the driving mode should be selected as follows:
a) If only one of the selectable modes causes the vehicle to follow the test cycle during the test, then that mode is selected;
b) If a plurality of modes are provided for enabling the vehicle to follow the test cycle in the test process, selecting according to the advice of an automobile manufacturer;
if no mode is available for the vehicle to follow the test cycle during the test, the test cycle should be modified according to the relevant criteria:
the driving mode should be consistent during the test and before and after the immersion.
Further, in the vehicle test process, the method further comprises the steps of measuring the current and the voltage of the vehicle REESS, and the specific implementation method of measuring the current and the voltage is as follows:
the REESS current should be measured in the test using a clamp-on or closed current sensor;
the current sensor should measure the REESS current through the connection to the REESS cable, the measured current should be the REESS total current;
in order for an external measurement device to more conveniently measure the REESS current, an automobile manufacturer should provide a suitable, safe and convenient connection point on the automobile;
when collecting current, selecting the sampling frequency of the current sensor according to the suggestion of an automobile production enterprise, wherein the minimum frequency is 20Hz;
when the external measurement device is used for measuring the REESS voltage, in order to make the external measurement device more convenient for measuring the REESS voltage, an automobile manufacturer should provide a proper, safe and convenient connection point on the automobile;
when the voltage is collected, the sampling frequency of the voltage sensor is selected according to the advice of the automobile manufacturing enterprises, and the minimum frequency is 20Hz.
Further, in the step S3, the method for creating the rapid test condition specifically includes:
dividing a speed segment into two test circulation segments and two constant speed segments;
the test cycle section consists of CLTC-P test cycles of the driving working condition of the Chinese light automobile, wherein each test cycle section comprises 2 test cycles;
setting the speed, wherein the speed of the two constant-speed sections is the same, the speed of the constant-speed sections is set to be more than 100km/h, and if the 30-minute maximum speed of the vehicle is less than the recommended speed, the speed of the constant-speed sections is set to be the 30-minute maximum speed of the vehicle; after the test cycle section is finished, the acceleration process of the vehicle to the constant speed section needs to be stable and is completed within 1 min;
mileage setting, wherein the mileage of the constant-speed section is determined according to the percentage of the available discharge capacity; the residual energy of the REESS after the test cycle should not exceed E REESS,STP 10% of (2); available discharge quantity E REESS,STP Obtained through testing, or provided by the enterprise;
wherein the mileage of the constant speed section is calculated according to the following formula:
wherein:
wherein:
BER est the test is performed by adopting a shortening method, and the vehicle is subjected to chassis dynamometerAn estimated value of the on-board mileage per km;
Further, in the step S4, the specific calculation method of the driving range is as follows:
related formula for determining driving range calculation
Wherein:
EC DC,j a unit Wh/km representing the energy consumption of the jth speed interval based on the REESS power variation;
j represents the sequence number of the speed interval, j being denoted c for a complete test cycle;
d j the driving mileage of the vehicle in the j-th speed interval is represented, and the unit km is represented;
ΔE REESS,j indicating the power change amount of all REESS in the jth speed interval, units Wh, deltaE REESS,j The calculation formula of (2) is as follows:
wherein:
g represents the REESS number;
m represents the total number of REESS;
ΔE REESS,g,j the variation of REESS power, unit Wh, ΔE, with number g, over the time frame representing the jth speed interval REESS,g,j The calculation formula of (2) is as follows:
wherein:
t 0 a unit s representing the start time of the j-th speed section;
t end a unit s representing the end time of the j-th speed section;
U(t) REESS,g,j in the time range of the jth speed interval, the voltage value of the REESS with the number g at the moment t is in a unit V;
I(t) g,j in the time range of the jth speed interval, the current value of REESS with the number g at the moment t is shown as a unit A;
the calculation formula of the driving mileage is as follows:
wherein:
BER represents driving mileage, unit km;
E REESS,STP the electric energy change amount of REESS before and after the shortening test is represented by a unit Wh;
EC DC represents the amount of energy consumed in units of Wh/km based on the amount of change in electrical energy of the REESS.
Wherein E is REESS,STP And EC (EC) DC Calculated according to the formula A, B:
wherein:
Wherein:
c represents the serial number of the test cycle, two test cycle segments DS 1 And DS 2 A total of 4 test cycles;
EC DC,c the unit Wh/km represents the energy consumption of the c-th test cycle based on the change in REESS power;
K c the weight coefficient representing the C-th test cycle is calculated according to formula C:
wherein:
ΔE REESS,c the calculated power change in unit Wh for all REESS for the c-th test cycle is shown.
Compared with the prior art, the method for rapidly testing the driving range of the electric automobile has the following advantages:
the method for rapidly testing the driving range of the electric automobile can greatly shorten the testing period of the driving range of the electric automobile. Through calculation, the test time used by the method for rapidly evaluating the driving range of the electric automobile is more than 50% shorter than that used by the conventional method. The longer the vehicle range, the more time it takes to decrease in a rapid manner. The test results obtained using the rapid test method are equivalent to those of the conventional method. The method provides a scientific method for detection authentication and research and development verification of detection institutions and whole vehicle enterprises.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a method for rapidly testing driving range of an electric vehicle according to an embodiment of the invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
First test procedure
The test step determines a range test procedure comprising the following 3 steps:
a) Primary charging of a REESS (rechargeable energy storage device);
b) Carrying out a driving range test;
c) And calculating a vehicle driving range result.
Between the execution of steps (a), (b), if the vehicle needs to be moved, the use of power on the vehicle is not allowed and the regenerative braking system is not active.
Second test vehicle charging
Before the electric vehicle is subjected to the range test, the vehicle battery needs to be subjected to primary charging treatment. The purpose is to ensure that the vehicle power battery is in a stable state. Unless the vehicle manufacturer or the ess manufacturer has other specifications, the initial charging of the ess should be performed as follows.
2.1 discharge of REESS
The REESS discharge should be performed according to a program prescribed by the automobile manufacturing company. The vehicle manufacturer should ensure that the REESS can discharge to the minimum SOC.
2.2REESS conventional charging
Conventional charging recommends an ac charging mode. When there are a plurality of alternating-current charging modes (e.g., conductive charging, inductive charging, etc.), the conductive charging mode should be used. If there are multiple conductive charge power levels available, the highest charge power should be used. If recommended by the vehicle manufacturer, a lower charging power may be selected. If the vehicle has only a DC charging mode, or according to the vehicle manufacturer's recommendations, the DC charging mode may be selected. The charging should be performed continuously, and if power failure occurs during the charging process, the test should be performed again. The charging mode should be selected according to the advice of the vehicle manufacturer.
The REESS was charged at ambient temperature 23.+ -. 3 ℃ using one of the following modes:
a) Vehicle-mounted charger (e.g., equipped);
b) An external charger suggested by the automobile manufacturing enterprises.
The above-described charging procedure does not include any special charging procedure that is initiated automatically or manually, such as a charge equalization mode or a maintenance mode.
2.3 Standard for end of Charge
When the vehicle-mounted or external device indicates that the REESS has been fully charged, it is determined that the charging is complete. If the vehicle or external instrument signals that the REESS is not full, the longest charging time is in this case: 3 x REESS energy (kWh)/Power supply (kW) specified by the automobile manufacturing company.
Selection of third driving mode
And (3) carrying out the driving range test of the electric automobile, wherein a correct driving mode is required to be selected, and the driving range result of the electric automobile is reasonably evaluated. And selecting a driving mode of the electric vehicle driving range test according to the following steps.
3.1 if there is a primary mode, and this mode allows the vehicle to follow the test cycle during the test, this mode is selected.
3.2 if there is no main mode, or a main mode, but this mode does not enable the vehicle to follow the test cycle during the test, the driving mode should be selected as follows:
a) If only one of the selectable modes is available for the vehicle to follow the test cycle during the test, then that mode is selected;
b) If there are multiple modes that allow the vehicle to follow the test cycle during the test, then the choice should be based on the recommendations of the vehicle manufacturer.
3.3 if no mode is available for the vehicle to follow the test cycle during the test, the test cycle should be modified according to GB 18352.6-2016 annex CA.5:
a) If a main mode exists, and the mode can enable the vehicle to follow the corrected test cycle in the test process, selecting the mode;
b) If there is no primary mode, or a primary mode, but this mode does not enable the vehicle to follow the test cycle during the test, then the vehicle should be selected according to the recommendations of the vehicle manufacturer in other modes that enable the vehicle to follow the modified test cycle during the test.
3.4 during the test and before and after the immersion, the driving mode should be kept consistent.
Fourth vehicle current and voltage measurement
The test was stopped from the start of the test until the sixth prescribed requirement in this example was reached. The current and voltage of all the REESS should be measured during the test according to how it is required.
4.1 external REESS current measurement
4.1.1REESS current should be measured in a test using a clamp-on or closed current sensor.
4.1.2 the current sensor should measure the REESS current by being connected to the REESS cable. The measured current should be the total current of the REESS.
4.1.3 in order to make it easier for external measurement devices to measure the REESS current, the automobile manufacturer should provide a suitable, safe and convenient connection point on board.
4.1.4 if there is no such connection point, the automotive manufacturer will provide the technical conditions to connect the current sensor to the cable directly connected to the REESS that can meet the above requirements.
4.1.5 the current sensor sampling frequency should be chosen according to the recommendations of the car manufacturer, which is at least 20Hz.
4.2 external REESS Voltage measurement
4.2.1 when the external measurement device is used to measure the REESS voltage, in order to make the external measurement device more convenient to measure the REESS voltage, the automobile manufacturer should provide a suitable, safe and convenient connection point on the automobile.
4.2.2 the voltage sensor sampling frequency should be chosen according to the recommendations of the car manufacturer, which is at least 20Hz.
Fifth rapid test operating mode
5.1 speed segment
The speed segment consists of 2 test cycle segments and 2 constant speed segments, see fig. 1. Wherein DS is 1 And DS 2 Is a test circulation section; CSS M And CSS E The constant speed section consists of a higher constant speed for discharging as soon as possible and reducing the test time.
5.2 test circulation section
The test cycle section consists of the CLTC-P test cycles of the driving working condition of the Chinese light automobile described in GB/T38146.1-2019 annex A, and each test cycle section comprises 2 test cycles.
5.3 constant speed section
5.3.1 speed requirement
The vehicle speed is the same for the 2 constant speed sections. The speed setting of the constant speed section is recommended to be 100km/h, and a higher speed may be selected. If the 30-minute maximum vehicle speed of the vehicle is less than the recommended vehicle speed, the vehicle speed of the constant speed section should be set to the 30-minute maximum vehicle speed of the vehicle. After the test cycle is completed, the acceleration of the vehicle to the constant speed section should be smooth and completed within 1 min.
5.3.2 Mileage requirement
Constant velocity section CSS E Is based on the available discharge E REESS,STP Is determined as a percentage of (c). Test circulation section DS 2 The residual energy of the REESS should not exceed E REESS,STP 10% of (C). Available discharge quantity E REESS,STP Obtained through testing, and also provided by enterprises through good engineering calculation.
Constant velocity section CSS M Is calculated according to formula (1):
wherein:
BER est -testing by shortening method, estimating the driving mileage of the vehicle on the chassis dynamometer, and obtaining km;
Sixth test end determination
6.1 the end of range test determination of the electric vehicle is determined according to whether the vehicle can keep track of the curve. And when the available electricity quantity of the power battery of the tested vehicle is insufficient to maintain the working condition tracking, ending the driving range test.
6.2 if the vehicle is in constant speed section CSS E When the speed error exceeds + -2 km/h or the time error exceeds + -2 s for 4s continuously, the test should be stopped. When the test ending condition is reached, the gear is kept unchanged, so that the vehicle slides to the lowest stable speed or 5km/h, and then the brake pedal is pressed down to stop.
Seventh range result calculation
7.1 related formulas for calculation of range
Formulas (2) to (4) are indispensable for calculating the range of the vehicle.
Wherein:
EC DC,j -energy consumption in Wh/km for the jth speed interval based on the power change of the REESS;
j, the sequence number of the speed interval, and for a complete test cycle, j is marked as c;
d j -mileage of the vehicle in the j-th speed interval, in km;
ΔE REESS,j -the power change amounts of all the REESS in the j-th speed interval, unit Wh, are calculated according to formula (3):
wherein:
g-REESS number;
m-total number of REESS;
ΔE REESS,g,j -the variation of the power of the REESS, numbered g, in the time range of the jth speed interval, per unit Wh, is calculated according to formula (4):
wherein:
t 0 -the start time of the j-th speed interval, unit s;
t end -end time of j-th speed interval, unit s;
U(t) REESS,g,j -voltage value of the REESS with the number g at the moment t in the time range of the jth speed interval, and the unit V;
I(t) g,j -current value of the REESS numbered g at time t, unit A, in the time range of the jth speed interval.
7.2 Rapid test method of driving mileage
The driving range is calculated according to the formula (5):
wherein:
ber—range, unit km;
E REESS,STP -electrical energy variation of the REESS, unit Wh, before and after the foreshortening test;
EC DC energy consumption in Wh/km based on REESS power change.
Wherein E is REESS,STP And EC (EC) DC Calculated according to formulas (6) and (7) respectively:
wherein:
Wherein:
c-sequence number of test cycle, two test cycle segment DS 1 And DS 2 A total of 4 test cycles;
EC DC,c -energy consumption in Wh/km for the c-th test cycle based on the amount of power change in the REESS;
K c -the weight coefficient of the c-th test cycle is calculated according to formula (8):
wherein:
ΔE REESS,c -calculating the power variation of all REESS per unit Wh for the c-th test cycle.
Those of ordinary skill in the art will appreciate that the elements and method steps of each example described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements and steps of each example have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in this application, it should be understood that the disclosed methods and systems may be implemented in other ways. For example, the above-described division of units is merely a logical function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. The units may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The method for rapidly testing the driving range of the electric automobile is characterized by comprising the following steps of:
s1, testing the charge and discharge of an automobile to ensure that a power battery of the automobile is in a stable state;
s2, selecting a correct driving mode for reasonably evaluating a driving range result of the electric automobile;
s3, creating test working conditions, including division of speed fragments, speed setting and mileage setting;
s4, calculating a driving range result, and calculating the driving range according to a related formula;
in the vehicle test process, the method also comprises the measurement of the current and the voltage of the vehicle REESS, and the specific implementation method of the measurement of the current and the voltage is as follows:
the REESS current should be measured in the test using a clamp-on or closed current sensor;
the current sensor should measure the REESS current through the connection to the REESS cable, the measured current should be the REESS total current;
in order to make it easier for external measurement devices to measure the REESS current, suitable, safe and convenient connection points are provided on the vehicle;
if the connection point is not available, the automobile manufacturer provides technical conditions for connecting the current sensor to a cable which is directly connected with the REESS and meets the requirements;
when collecting current, selecting the sampling frequency of the current sensor according to the suggestion of an automobile production enterprise, wherein the minimum frequency is 20Hz;
when the external measurement device is used for measuring the REESS voltage, in order to make the external measurement device more convenient for measuring the REESS voltage, an automobile manufacturer should provide a proper, safe and convenient connection point on the automobile;
when collecting voltage, selecting the sampling frequency of the voltage sensor according to the advice of the automobile production enterprises, wherein the minimum frequency is 20Hz;
in the step S3, the method for creating the rapid test condition specifically includes:
dividing a speed segment into two test circulation segments and two constant speed segments;
the test cycle section consists of CLTC-P test cycles of the driving working condition of the Chinese light automobile, wherein each test cycle section comprises 2 test cycles;
setting the speed, wherein the speed of the two constant-speed sections is the same, the speed of the constant-speed sections is set to be more than 100km/h, and if the 30-minute maximum speed of the vehicle is less than the recommended speed, the speed of the constant-speed sections is set to be the 30-minute maximum speed of the vehicle; after the test cycle section is finished, the acceleration process of the vehicle to the constant speed section needs to be stable and is completed within 1 min;
mileage setting, wherein the mileage of the constant-speed section is determined according to the percentage of the available discharge capacity; the residual energy of the REESS after the test cycle should not exceed E REESS,STP 10% of (2); available discharge quantity E REESS,STP Obtained through testing, or provided by the enterprise;
wherein the mileage of the constant speed section is calculated according to the following formula:
wherein:
BER est the estimated value of the driving mileage of the vehicle on the chassis dynamometer is expressed by adopting a shortening method for test, and the unit km is shown;
in the step S4, the specific calculation method of the driving range is as follows:
related formula for determining driving range calculation
Wherein:
EC DC,j a unit Wh/km representing the energy consumption of the jth speed interval based on the REESS power variation;
j represents the sequence number of the speed interval, j being denoted c for a complete test cycle;
d j the driving mileage of the vehicle in the j-th speed interval is represented, and the unit km is represented;
ΔE REESS,j indicating the power change amount of all REESS in the jth speed interval, units Wh, deltaE REESS,j The calculation formula of (2) is as follows:
wherein:
g representing a REESS number;
m represents the total number of REESS;
ΔE REESS,g,j the variation of REESS power, unit Wh, ΔE, with number g, over the time frame representing the jth speed interval REESS,g,j The calculation formula of (2) is as follows:
wherein:
t 0 a unit s representing the start time of the j-th speed section;
t end a unit s representing the end time of the j-th speed section;
U(t) REESS,g,j in the time range of the jth speed interval, the voltage value of the REESS with the number g at the moment t is in a unit V;
I(t) g,j in the time range of the jth speed interval, the current value of REESS with the number g at the moment t is shown as a unit A;
the calculation formula of the driving mileage is as follows:
wherein:
BER represents driving mileage, unit km;
E REESS,STP the electric energy change amount of REESS before and after the shortening test is represented by a unit Wh;
EC DC representing the energy consumption amount based on the REESS power variation, unit Wh/km;
wherein E is REESS,STP And EC (EC) DC Calculated according to the formula A, B:
wherein:
wherein:
c represents the serial number of the test cycle, two test cycle segments DS 1 And DS 2 A total of 4 test cycles;
EC DC,c the unit Wh/km represents the energy consumption of the c-th test cycle based on the change in REESS power;
K c the weight coefficient representing the C-th test cycle is calculated according to formula C:
wherein:
ΔE REESS,c the calculated power change in unit Wh for all REESS for the c-th test cycle is shown.
2. The method for rapidly testing the driving range of the electric vehicle according to claim 1, wherein in the step S1, the vehicle charging and discharging are tested, comprising:
the REESS discharges, and the REESS is ensured to discharge to the lowest value of the SOC;
the REESS is charged conventionally, and the REESS is charged at the ambient temperature of 23+/-3 ℃ in the following way until the charging is finished:
if the vehicle-mounted charger is installed, charging by adopting the vehicle-mounted charger; otherwise, the external charger is suggested by the automobile manufacturing enterprises.
3. The method for rapidly testing the driving range of the electric vehicle according to claim 2, wherein the judging condition of the end of charging is:
when the vehicle-mounted or external instrument displays that the REESS is fully charged, judging that the charging is completed;
if the vehicle or external instrument signals that the REESS is not full, the longest charging time is in this case: 3 x REESS energy (kWh)/Power supply (kW) specified by the automobile manufacturing company.
4. The method for rapidly testing the driving range of the electric vehicle according to claim 1, wherein in the step S2, the method for selecting the driving mode is as follows:
if there is a primary mode in which the vehicle is able to follow the test cycle during the test, then selecting that mode;
if there is no primary mode, or a primary mode, but the primary mode does not enable the vehicle to follow the test cycle during the test, the driving mode should be selected as follows:
a) If only one of the selectable modes causes the vehicle to follow the test cycle during the test, then that mode is selected;
b) If a plurality of modes are provided for enabling the vehicle to follow the test cycle in the test process, selecting according to the advice of an automobile manufacturer;
if no mode is available for the vehicle to follow the test cycle during the test, the test cycle should be modified according to the relevant criteria:
the driving mode should be consistent during the test and before and after the immersion.
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| CN113619396B (en) * | 2021-09-17 | 2023-04-07 | 合众新能源汽车股份有限公司 | Driving range and energy consumption testing method and device for electric automobile |
| CN114179618A (en) * | 2021-10-09 | 2022-03-15 | 恒大新能源汽车投资控股集团有限公司 | Vehicle mileage test method and device and computer readable storage medium |
| CN114509683A (en) * | 2022-01-10 | 2022-05-17 | 中国第一汽车股份有限公司 | Electric balance testing method for standard working condition of whole vehicle |
| FR3142806A1 (en) * | 2022-12-02 | 2024-06-07 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method and system for determining data representative of the maximum autonomy of a battery of an electrical device |
| CN116973784B (en) * | 2023-09-25 | 2024-01-02 | 中汽研汽车检验中心（天津）有限公司 | Method for rapidly testing low-temperature driving range of pure electric vehicle, electronic equipment and medium |
| CN117574694B (en) * | 2024-01-17 | 2024-06-21 | 中汽研汽车检验中心(广州)有限公司 | Method for shortening driving range and simulating and analyzing energy consumption of pure electric vehicle |
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