A method and system for testing the range of an electric vehicle

Abstract

The application discloses a kind of electric vehicle endurance test method and system, the method includes: vehicle debugging to preset state, control vehicle keeps preset speed for preset time;Vehicle power is charged to full power, then the power of vehicle is rapidly consumed and when the power consumption of vehicle is to first power threshold, control vehicle keeps preset speed;When the power consumption of vehicle is to second power threshold, start recording the endurance mileage of vehicle until the back-end endurance mileage of vehicle is obtained after vehicle can not maintain preset speed;Respectively obtain the average discharge power of battery pack of vehicle and the charging power in the full power of vehicle;According to the average discharge power of battery pack and charging power, the vehicle energy consumption efficiency of vehicle is obtained;According to the front-end endurance mileage of vehicle is determined according to vehicle energy consumption efficiency, and the endurance mileage of vehicle is obtained according to front-end and back-end endurance mileage.The application solves the problem of low efficiency of electric vehicle endurance test in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a test method and system for the endurance mileage of an electric vehicle. BACKGROUND

[0002] With the vigorous development of urban logistics, urban commercial electric vehicles have entered a period of vigorous development. The endurance mileage, as an important performance indicator of commercial electric vehicles, to some extent, affects the choice of consumers.

[0003] Commercial electric vehicle manufacturers will conduct a round of endurance mileage tests before the product is announced. The endurance mileage of a general passenger car is 400-600 kilometers, and the test condition is 40 km / h constant speed endurance. It takes about 12-14 hours to complete the entire test of a test vehicle. Such long-time, high-load and high-intensity endurance mileage tests pose a great challenge to the test room, and the overall test period is long and the efficiency is low. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a test method and system for the endurance mileage of an electric vehicle, which aims to solve the problem of low efficiency in the prior art when testing the endurance mileage of an electric vehicle.

[0005] The embodiment of the present application is implemented as follows:

[0006] A test method for the endurance mileage of an electric vehicle, the method comprising:

[0007] placing the vehicle in a predetermined test environment and debugging the vehicle to a predetermined state, and controlling the vehicle to maintain a predetermined speed for a predetermined time;

[0008] charging the electric quantity of the vehicle to a full electric quantity, then rapidly consuming the electric quantity of the vehicle, and when the electric quantity of the vehicle is consumed to a first electric quantity threshold, controlling the vehicle to maintain the predetermined speed;

[0009] when the electric quantity of the vehicle is consumed to a second electric quantity threshold, starting to record the endurance mileage of the vehicle until the rear-end endurance mileage is obtained when the vehicle cannot maintain the predetermined speed;

[0010] respectively obtaining the average discharge power of the battery pack in the control of the vehicle to maintain the predetermined speed for a predetermined time and the charging electric quantity in the charging of the electric quantity of the vehicle to a full electric quantity;

[0011] obtaining the overall energy consumption efficiency of the vehicle at the predetermined speed according to the average discharge power of the battery pack and the charging electric quantity;

[0012] According to the whole vehicle energy consumption efficiency, the front-end endurance mileage of the vehicle is determined, and the endurance mileage of the vehicle is obtained according to the front-end endurance mileage and the rear-end endurance mileage.

[0013] Further, the above electric vehicle endurance mileage test method, wherein the step of placing the vehicle in a preset test environment and debugging the vehicle to a preset state comprises:

[0014] An actual road resistance coefficient of the vehicle in actual road sliding is obtained to match the sliding resistance coefficient on the chassis dynamometer to obtain the resistance coefficient for the chassis dynamometer loading, wherein the chassis dynamometer is provided with an environment bin and a fast charging pile;

[0015] The test vehicle is fully charged, and is placed in the environment bin, and the battery pack cell temperature of the vehicle is monitored in real time, and the battery pack cell temperature reaches a preset temperature.

[0016] Further, the above electric vehicle endurance mileage test method, wherein the step of charging the vehicle to a full charge, then rapidly consuming the electric quantity of the vehicle and controlling the vehicle to maintain the preset speed when the electric quantity of the vehicle is consumed to a first electric quantity threshold comprises:

[0017] The fully charged vehicle is placed in the environment bin at a preset temperature for a preset time, the vehicle is driven to a maximum speed, and the chassis dynamometer loading slope is controlled to rapidly consume the electric quantity of the vehicle.

[0018] Further, the above electric vehicle endurance mileage test method, wherein the step of obtaining the whole vehicle energy consumption efficiency of the vehicle at the preset speed according to the average battery pack discharge power and the charging electric quantity comprises:

[0019] According to the charging electric quantity and the average battery pack discharge power, the theoretical driving time of the vehicle at the preset speed is obtained;

[0020] The theoretical driving time is calculated by ratio to determine the whole vehicle energy consumption efficiency of the vehicle at the preset speed.

[0021] Further, the above electric vehicle endurance mileage test method, wherein the step of determining the front-end endurance mileage of the vehicle according to the whole vehicle energy consumption efficiency comprises:

[0022] The total electric quantity of the vehicle is obtained, and the effective energy consumption of the vehicle before a preset electric quantity ratio is obtained according to the total electric quantity of the vehicle, the preset ratio and the whole vehicle energy consumption efficiency;

[0023] The front-end cruising range is determined according to the effective energy consumption, the average discharging power and the preset speed.

[0024] Further, the step of placing the vehicle in a preset test environment and debugging the vehicle to a preset state, and controlling the vehicle to maintain a preset speed for a preset time comprises:

[0025] In the state that the electric appliances of the vehicle are turned off, the vehicle is controlled to maintain a preset speed for a preset time.

[0026] Further, the first electric quantity threshold is 30%, the second electric quantity threshold is 20%, and the preset speed is 40 km / h.

[0027] Another object of the present application is to provide an electric vehicle cruising range test system, which comprises:

[0028] A debugging module is configured to place the vehicle in a preset test environment and debug the vehicle to a preset state, and control the vehicle to maintain a preset speed for a preset time.

[0029] A consumption module is configured to charge the electric quantity of the vehicle to a full electric quantity, and then rapidly consume the electric quantity of the vehicle, and control the vehicle to maintain the preset speed when the electric quantity of the vehicle is consumed to a first electric quantity threshold.

[0030] A recording module is configured to start recording the cruising range of the vehicle when the electric quantity of the vehicle is consumed to a second electric quantity threshold, until a rear-end cruising range is obtained when the vehicle cannot maintain the preset speed.

[0031] An acquisition module is configured to acquire the average discharging power of the battery pack in the step of controlling the vehicle to maintain a preset speed for a preset time, and the charging electric quantity in the step of charging the electric quantity of the vehicle to a full electric quantity.

[0032] A determination module is configured to obtain the whole vehicle energy consumption efficiency of the vehicle at the preset speed according to the average discharging power of the battery pack and the charging electric quantity.

[0033] A calculation module is configured to determine the front-end cruising range of the vehicle according to the whole vehicle energy consumption efficiency, and obtain the cruising range of the vehicle according to the front-end cruising range and the rear-end cruising range.

[0034] Another object of the present application is to provide a readable storage medium, which stores a computer program, and the program is executed by a processor to implement the steps of the above method.

[0035] It is another object of the embodiments of the present application to provide an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method when executing the program.

[0036] The present application places the vehicle in a preset test environment and debugs the vehicle to a preset state, controls the vehicle to maintain a preset speed for a preset time, charges the vehicle to full power, then rapidly consumes the power of the vehicle, and when the power of the vehicle is consumed to a first power threshold, controls the vehicle to maintain the preset speed; when the power of the vehicle is consumed to a second power threshold, starts recording the cruising range of the vehicle until the rear-end cruising range is obtained when the vehicle cannot maintain the preset speed; respectively obtains the average discharge power of the battery pack in the control of the vehicle to maintain the preset speed for the preset time and the charging power in the charging of the vehicle to full power; obtains the whole vehicle energy consumption efficiency of the vehicle at the preset speed according to the average discharge power of the battery pack and the charging power; determines the front-end cruising range of the vehicle according to the whole vehicle energy consumption efficiency, and obtains the cruising range of the vehicle according to the front-end cruising range and the rear-end cruising range. Based on the method of the cruising range, the test efficiency is greatly improved, the test verification speed is accelerated, and the test time is shortened under the condition of meeting the test result accuracy by the rapid discharge method. The problem of low efficiency in the prior art when testing the cruising range of the electric vehicle is solved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The flowchart of the electric vehicle cruising range test method in the first embodiment of the present application;

[0038] Figure 2 The structural block diagram of the electric vehicle cruising range test system in the second embodiment of the present application.

[0039] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The drawings show several embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0041] It is to be understood that where an element such as a layer, region or substrate is described as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where an element is described as being "connected" or "coupled" to another element, it can be directly connected or coupled or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] With the vigorous development of urban logistics, urban logistics commercial electric vehicles have entered a period of vigorous development. As an important performance indicator of commercial electric vehicles, the driving range has influenced the choice of consumers to some extent.

[0044] Commercial electric vehicle manufacturers will conduct round after round of driving range tests before product announcement. The driving range of general passenger vehicles is 400-600 kilometers, and the test condition is 40 km / h constant speed endurance. It takes about 12-14 hours to complete the entire test of a test vehicle. Such long-time, high-load and high-intensity driving range test puts great challenges to the test room, and the overall test period is long and the efficiency is low.

[0045] The following will be described in detail how to improve the efficiency of electric vehicle endurance test with specific embodiments and drawings.

[0046] Example 1

[0047] Please refer to Figure 1 , which shows the proposed electric vehicle endurance test method in the first embodiment of the application. The method comprises steps S10-S15.

[0048] Step S10, place the vehicle in a predetermined test environment and debug the vehicle to a predetermined state, and control the vehicle to maintain a predetermined speed for a predetermined time.

[0049] Specifically, the actual road resistance coefficient of the vehicle sliding on the actual road is obtained to match the sliding resistance coefficient on the chassis dynamometer to obtain the resistance coefficient for the chassis dynamometer loading, wherein the chassis dynamometer has an environment bin and a fast charging pile; the test vehicle is fully charged and placed in the environment bin, and the battery pack cell temperature of the vehicle is monitored in real time, and the battery pack cell temperature reaches a predetermined temperature.

[0050] In a specific implementation, the actual road resistance coefficient of the test vehicle is obtained through actual road sliding; the sliding resistance coefficient matching is performed on the chassis dynamometer to obtain the resistance coefficient for the chassis dynamometer loading, the test vehicle is fully charged, and the battery pack cell temperature is monitored in real time, and when the battery pack cell temperature reaches 25±2℃, the next test is started, the test vehicle is turned off all electrical appliances such as air conditioner, radio, etc. after the driver gets on the vehicle, and the test vehicle is driven to 40km / h for 1 hour. During the test, the test personnel collect real-time data of the vehicle during the test through the vehicle OBD port, including the following parameters: battery pack discharge power P1, vehicle speed, battery pack cell temperature, etc.

[0051] Step S11, the power of the vehicle is charged to full power, and then the power of the vehicle is quickly consumed, and when the power of the vehicle is consumed to a first power threshold, the vehicle is controlled to maintain the preset speed.

[0052] Wherein, the vehicle with full power is placed in the environment bin at a preset temperature for a preset time, the vehicle is driven to the highest speed, and the loading slope of the chassis dynamometer is controlled to achieve the quick consumption of the power of the vehicle. Specifically, the test vehicle with full power is placed in the environment bin for no more than 12 hours, the temperature of the environment bin is set to 25℃, the test vehicle is driven to the highest speed by the driver, the loading slope of the chassis dynamometer is adjusted to achieve the purpose of quick power consumption, and when the power is reduced to 30%, the speed is reduced to 40km / h, and the loading slope of the chassis dynamometer is adjusted to 0.

[0053] Step S12, when the power of the vehicle is consumed to a second power threshold, the driving range of the vehicle is started to be recorded until the rear-end driving range is obtained when the vehicle cannot maintain the preset speed.

[0054] Specifically, continue to drive to 20% of the power, start to record the driving range of the test vehicle, and end the test when the speed cannot be maintained at 40km / h, and the driving range of the last 20% of the power is S1, which is the rear-end driving range.

[0055] Step S13, respectively acquiring the average battery pack discharge power in the preset speed of controlling the vehicle to maintain a preset time and the charging power in the full power of the vehicle.

[0056] Wherein, the average value of the battery pack discharge power P1 collected in the preset speed of controlling the vehicle to maintain a preset time is calculated to obtain the average battery pack discharge power P2 of the test vehicle at a speed of 40km / h.

[0057] Step S14, obtaining the whole vehicle energy consumption efficiency of the vehicle at the preset speed according to the average discharging power of the battery pack and the charging electric quantity.

[0058] Specifically, the theoretical running time of the charging electric quantity of the vehicle at the preset speed is obtained according to the charging electric quantity and the average discharging power of the battery pack.

[0059] The whole vehicle energy consumption efficiency of the vehicle at the preset speed is determined by ratio calculation on the theoretical running time.

[0060] Since the efficiency of the motor and the efficiency of the whole vehicle transmission system cannot be 100%, T1 obtained in step 11 is divided by 1 to obtain the whole vehicle energy consumption efficiency η1 of the test vehicle at the speed of 40km / h.

[0061] Step S15, determining the front-end endurance mileage of the vehicle according to the whole vehicle energy consumption efficiency, and obtaining the endurance mileage of the vehicle according to the front-end endurance mileage and the rear-end endurance mileage.

[0062] Specifically, the total electric quantity of the vehicle is obtained, and the effective energy consumption before the preset electric quantity ratio of the vehicle is obtained according to the total electric quantity of the vehicle, the preset ratio and the whole vehicle energy consumption efficiency.

[0063] The endurance mileage before the preset electric quantity ratio is obtained according to the effective energy consumption, the average discharging power and the preset speed to determine the front-end endurance mileage.

[0064] Specifically, the total electric quantity Q2 of the test vehicle is multiplied by 80% and then multiplied by the whole vehicle energy consumption efficiency η1 to obtain the effective energy consumption Q3 of the test vehicle before 80% of the electric quantity; the endurance mileage S1 of the test vehicle before 80% of the electric quantity is obtained by dividing the effective energy consumption Q3 by the average discharging power P2 and then multiplying by the speed of 40km / h, and the endurance mileage of the vehicle is the sum of the front-end endurance mileage and the rear-end endurance mileage.

[0065] For a clearer understanding of the present application, a specific embodiment of the present application is shown below, and it should be noted that the specific embodiment below is only for a clearer explanation of the present application and does not limit the present application.

[0066] 1) A commercial electric vehicle of a certain automobile manufacturer, the electric quantity Q2 of the battery pack is 120kw·h, and after actual road sliding, it is transferred to a chassis dynamometer with an environmental chamber and a fast charging pile for sliding;

[0067] 2) After the completion of the sliding test, the test vehicle is fully charged with a fast charging pile, the temperature in the environmental chamber is set to 20°C, the chassis dynamometer cooling fan speed is 60 km / h, and the battery pack is cooled quickly in the environmental chamber. The battery cell temperature is monitored in real time. When the battery cell temperature reaches 25±2°C, the test begins;

[0068] 3) The driver gets on the car, turns off all the power-consuming devices such as air conditioner, radio, and light on the car, and maintains the speed at 40 km / h. After 1 hour of continuous driving, the car is parked and the power is turned off;

[0069] 4) During the test, the test personnel collect real-time data during the vehicle test through the OBD port, including the following parameters: battery pack discharge power P1, vehicle speed, battery cell temperature, etc. Data collection starts from the driver getting on the high voltage and ends when the driver parks and turns off the power;

[0070] 5) The test vehicle is fully charged with a fast charging pile. During the charging process, the charging capacity Q1 value is 10732 w·h through the OBD port;

[0071] 6) The test vehicle is immersed in an environment with a temperature of 25°C for no more than 12 hours, and the main test begins;

[0072] 7) The driver drives the test vehicle to a maximum speed of 100 km / h, and the chassis dynamometer loading slope value is 2%. After 2 hours and 12 minutes of driving, the battery pack power drops to 30%. The speed is reduced to 40 km / h, and the chassis dynamometer slope value is adjusted to 0 to continue driving;

[0073] 8) After 1 hour and 25 minutes, the battery pack power drops to 20%. The test vehicle's range is recorded. After 2 hours and 35 minutes, the battery pack power is 2%, and the speed cannot be maintained at 40 km / h. The test is completed. The range S2 completed by the last 20% of power is 106.2 km;

[0074] 9) The average discharge power P2 of the battery pack of the test vehicle at a speed of 40 km / h collected in step 4 is 7.28 kw. The Q1 value in step 5 divided by the P2 value gives the theoretical driving time T1 of the Q1 power at a speed of 40 km / h as 1.474 hours;

[0075] 10) Since the efficiency of the motor and the efficiency of the vehicle transmission system cannot be 100%, the T1 obtained in the previous step 9 is divided by 1 to obtain the vehicle energy consumption efficiency η1 of the test vehicle at a speed of 40 km / h as 67.84%

[0076] 11) The total power Q2 (120kw·h) of the test vehicle is multiplied by 80%, and then multiplied by η1 (67.84%) in step 10, so that the effective energy consumption Q3 of the test vehicle in the first 80% is 65.13kw·h;

[0077] 12) The Q3 (65.13kw·h) in step 11 is divided by the average discharge power P2 (7.28kw) in step 9, and then multiplied by the speed of 40km / h, so that the driving range S1 of the test vehicle in the first 80% is 357.84km;

[0078] 13) The total driving range S of the test vehicle is the sum of S2 (106.2km) in step 8 and S1 (357.84km) in step 12, which is 464.04km in total, and is rounded to 464km;

[0079] 14) The test vehicle directly uses the same chassis dynamometer resistance coefficient, and directly uses the speed of 40km / h to conduct the driving range test after being fully charged and standing still until the temperature of the battery cell is 25℃. After 11 hours and 47 minutes of driving, the total driving range is 471km.

[0080] The test results are shown in Table 1 below:

[0081] Table 1

[0082] Range (km) Test time (min) The method of the invention 464 372 Old test method 471 707

[0083] As can be seen from the above table, compared with the old test method, the precision of the test method of the present application is 98.51%, which is calculated as follows: precision = (1-(471-464) / 471)*100%; The time saved is 47.38 (about 335 minutes).

[0084] In summary, the electric vehicle endurance test method in the above embodiments of the present application, by placing the vehicle in a predetermined test environment and debugging the vehicle to a predetermined state, the vehicle is controlled to maintain a predetermined speed for a predetermined time; the power of the vehicle is charged to full power, and then the power of the vehicle is quickly consumed, and when the power of the vehicle is consumed to a first power threshold, the vehicle is controlled to maintain the predetermined speed; when the power of the vehicle is consumed to a second power threshold, the endurance mileage of the vehicle is started to be recorded until the rear-end endurance mileage is obtained when the vehicle cannot maintain the predetermined speed; the average discharge power of the battery pack in the control of the vehicle maintaining the predetermined speed for a predetermined time and the charging power in the charging of the power of the vehicle to full power are obtained respectively; the vehicle energy consumption efficiency under the predetermined speed is obtained according to the average discharge power of the battery pack and the charging power; the front-end endurance mileage of the vehicle is determined according to the vehicle energy consumption efficiency, and the endurance mileage of the vehicle is obtained according to the front-end endurance mileage and the rear-end endurance mileage. Based on the endurance mileage method, the test efficiency is greatly improved, the test verification speed is accelerated, and the test time is shortened under the condition of meeting the test result precision. The problem of low efficiency in the prior art during electric vehicle endurance test is solved.

[0085] Example 2

[0086] Please refer to Figure 2 , which is an electric vehicle endurance test system proposed in the fourth embodiment of the present application, the system comprises:

[0087] The debugging module 100 is used for placing the vehicle in a predetermined test environment and debugging the vehicle to a predetermined state, and controlling the vehicle to maintain a predetermined speed for a predetermined time;

[0088] The consumption module 200 is used for charging the power of the vehicle to full power, and then quickly consuming the power of the vehicle, and when the power of the vehicle is consumed to a first power threshold, controlling the vehicle to maintain the predetermined speed;

[0089] The recording module 300 is used for starting to record the endurance mileage of the vehicle when the power of the vehicle is consumed to a second power threshold until the rear-end endurance mileage is obtained when the vehicle cannot maintain the predetermined speed;

[0090] The acquisition module 400 is used for acquiring the average discharge power of the battery pack in the control of the vehicle maintaining the predetermined speed for a predetermined time and the charging power in the charging of the power of the vehicle to full power respectively;

[0091] The determination module 500 is used for obtaining the vehicle energy consumption efficiency under the predetermined speed according to the average discharge power of the battery pack and the charging power;

[0092] The computing module 600 is configured to determine the front-end cruising range of the vehicle according to the whole-vehicle energy consumption efficiency, and obtain the cruising range of the vehicle according to the front-end cruising range and the rear-end cruising range.

[0093] Further, in some optional embodiments of the present application, the debugging module comprises:

[0094] The acquisition unit is configured to acquire an actual road resistance coefficient of the vehicle in actual road sliding, so as to perform sliding resistance coefficient matching on a chassis dynamometer to obtain a resistance coefficient for loading of the chassis dynamometer, wherein the chassis dynamometer is provided with an environment cabin and a fast charging pile.

[0095] The standing unit is configured to fully charge the test vehicle and stand the test vehicle in the environment cabin, and monitor the battery pack cell temperature of the vehicle in real time, until the battery pack cell temperature reaches a preset temperature.

[0096] Further, in some optional embodiments of the present application, the consumption module comprises:

[0097] The loading unit is configured to stand the fully charged vehicle in the environment cabin at a preset temperature for a preset time, drive the vehicle to a maximum vehicle speed, and control the loading slope of the chassis dynamometer, so that the power of the vehicle is consumed rapidly.

[0098] Further, the above electric vehicle cruising range test system, wherein the determining module is specifically configured to:

[0099] obtain a theoretical driving time of the vehicle at the preset speed according to the charging power and the average battery pack discharging power;

[0100] determine the whole-vehicle energy consumption efficiency of the vehicle at the preset speed by ratio calculation on the theoretical driving time.

[0101] Further, the above electric vehicle cruising range test system, wherein the computing module is specifically configured to:

[0102] obtain the total power of the vehicle, and obtain the effective energy consumption of the vehicle before a preset power ratio according to the total power of the vehicle, the preset ratio and the whole-vehicle energy consumption efficiency;

[0103] obtain the cruising range before the preset power ratio according to the effective energy consumption, the average discharging power and the preset speed to determine the front-end cruising range.

[0104] Further, in some optional embodiments of the present application, the debugging module further comprises:

[0105] A closing unit is configured to control the vehicle to maintain a preset speed for a preset time in a state where the vehicle electrical appliance is closed.

[0106] Further, the electric vehicle endurance test system, wherein the first electric quantity threshold is 30%, the second electric quantity threshold is 20%, and the preset speed is 40km / h.

[0107] The functions or operation steps realized when the above modules are executed are substantially the same as those of the above method embodiments, and will not be described here again.

[0108] Example 3

[0109] Another aspect of the present application also provides a readable storage medium, which stores a computer program, and the program is executed by a processor to realize the steps of the method described in the above embodiment 1.

[0110] Example 4

[0111] Another aspect of the present application also provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the program to realize the steps of the method described in the above embodiment 1.

[0112] The technical features of each of the above embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0113] Those skilled in the art can understand that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a list of executable instructions for realizing the logic function, which can be embodied in any storage medium for use by or in conjunction with an instruction execution system, device or apparatus, such as a computer-based system, a system including a processor or other system that can fetch and execute instructions from an instruction execution system, device or apparatus. For the present specification, the "storage medium" can be any device that can contain, store, communicate, propagate or transport programs for use by or in conjunction with an instruction execution system, device or apparatus.

[0114] More specific examples (a non-exhaustive list) of the storage media include the following: an electrical connection having one or more wires (electrical wiring), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the storage media can be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer storage medium.

[0115] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations thereof. In the embodiments described above, various steps or methods can be implemented, for example, by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, and in another embodiment, any of the following techniques can be used to implement the hardware: discrete logic circuits having logic gates for implementing logic functions upon data signals, application specific integrated circuits having logic gates for implementing logic functions upon data signals, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0116] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0117] The above-described embodiments are merely some embodiments of the present application, and the description is more specific and detailed, but should not be understood as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the present application should be determined by the appended claims.

Claims

1. A method for testing the driving range of an electric vehicle, characterized in that, The method comprises: Placing the vehicle in a preset test environment and debugging the vehicle to a preset state, controlling the vehicle to maintain a preset speed for a preset time; Charging the vehicle to full power, then rapidly consuming the power of the vehicle, and when the power of the vehicle is consumed to a first power threshold, controlling the vehicle to maintain the preset speed; When the power of the vehicle is consumed to a second power threshold, starting to record the cruising range of the vehicle until the rear-end endurance mileage of the vehicle is obtained when the vehicle cannot maintain the preset speed; Respectively obtaining the average discharge power of the battery pack in the control of the vehicle to maintain the preset speed for a preset time and the charging power in the charging of the vehicle to full power; According to the average discharge power of the battery pack and the charging power, the whole vehicle energy consumption efficiency of the vehicle at the preset speed is obtained; According to the whole vehicle energy consumption efficiency, the front-end endurance mileage of the vehicle is determined, and the endurance mileage of the vehicle is obtained according to the front-end endurance mileage and the rear-end endurance mileage.

2. The electric vehicle range test method of claim 1, wherein, The step of placing the vehicle in a preset test environment and debugging the vehicle to a preset state comprises: Obtaining the actual road resistance coefficient of the vehicle in actual road sliding, performing sliding resistance coefficient matching on the chassis dynamometer to obtain the resistance coefficient for the chassis dynamometer loading, wherein the chassis dynamometer has an environment bin and a rapid charging pile; The vehicle is fully charged, and the vehicle is placed in the environment bin, and the temperature of the battery pack of the vehicle is monitored in real time, and the temperature of the battery pack of the vehicle reaches a preset temperature.

3. The electric vehicle range test method of claim 2, wherein, The step of charging the vehicle to full power, then rapidly consuming the power of the vehicle, and when the power of the vehicle is consumed to a first power threshold, controlling the vehicle to maintain the preset speed comprises: The vehicle with full power is placed in the environment bin at a preset temperature for a preset time, the vehicle is driven to the highest speed, and the loading slope of the chassis dynamometer is controlled to rapidly consume the power of the vehicle.

4. The electric vehicle range test method of claim 1, wherein, The step of obtaining the whole vehicle energy consumption efficiency of the vehicle at the preset speed according to the average discharge power of the battery pack and the charging power comprises: According to the charging power and the average discharge power of the battery pack, the theoretical driving time of the vehicle at the preset speed is obtained; The theoretical driving time is calculated by ratio to determine the whole vehicle energy consumption efficiency of the vehicle at the preset speed.

5. The electric vehicle range test method of claim 1, wherein, The step of determining the front-end endurance mileage of the vehicle according to the whole vehicle energy consumption efficiency comprises: Obtaining the total power of the vehicle, and obtaining the effective energy consumption of the vehicle before the preset power ratio according to the total power of the vehicle, the preset power ratio and the whole vehicle energy consumption efficiency; According to the effective energy consumption, the average discharge power and the preset speed, the cruising range before the preset power ratio is determined to determine the front-end endurance mileage.

6. The electric vehicle range test method of claim 1, wherein, The step of placing the vehicle in a preset test environment and debugging the vehicle to a preset state, controlling the vehicle to maintain a preset speed for a preset time comprises: In a state that the vehicle electrical appliance is closed, the vehicle is controlled to keep a preset speed for a preset time.

7. The electric vehicle range test method according to any one of claims 1 to 6, characterized in that, The first power threshold is 30%, the second power threshold is 20%, and the preset speed is 40km / h.

8. An electric vehicle range test system, comprising: The system comprises: A debugging module is configured to put the vehicle into a preset test environment and debug the vehicle to a preset state, and control the vehicle to keep a preset speed for a preset time. A consumption module is configured to charge the power of the vehicle to a full power, and then rapidly consume the power of the vehicle, and when the power of the vehicle is consumed to a first power threshold, control the vehicle to keep the preset speed. A recording module is configured to start recording the cruising range of the vehicle when the power of the vehicle is consumed to a second power threshold, until a rear-end cruising range is obtained when the vehicle cannot maintain the preset speed. An acquisition module is configured to acquire a battery pack average discharge power in the control of the vehicle to keep the preset speed for the preset time, and a charging power in the charging of the power of the vehicle to the full power. A determination module is configured to obtain a whole vehicle energy consumption efficiency of the vehicle at the preset speed according to the battery pack average discharge power and the charging power. A calculation module is configured to determine a front-end cruising range of the vehicle according to the whole vehicle energy consumption efficiency, and obtain a cruising range of the vehicle according to the front-end cruising range and the rear-end cruising range.

9. A readable storage medium, having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the steps of the method of any one of claims 1 to 7.

10. An electronic device, comprising: The computer program is stored in the memory and executable on the processor, and the processor implements the steps of the method of any one of claims 1 to 7 when executing the program. The computer program is stored in the memory and executable on the processor, and the processor implements the steps of the method of any one of claims 1 to 7 when executing the program.

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