On December 17, 2023, Li Bin, the founder of NIO, did a very interesting thing. He personally drove a NIO ET7 sedan for a live broadcast mileage test; regardless of whether any brand has conducted live vehicle evaluations before, It is unique for the CEO of a car company to do this, so from the beginning of the test at 6:30 in the morning to the completion of the test, the whole process gained a lot of attention. The
test vehicle has a 150kWh power battery pack with a very large capacity. The goal of this test is to challenge the battery life to exceed 1,000 kilometers. The final test result of
is 1044 kilometers, of which 957 kilometers are completed in intelligent driving mode. The remaining CLTC operating mileage is 36 kilometers. For detailed parameters, please refer to the figure below.
The controversial point is that the average speed of
is 83.9km/h (km/h). How valuable is this test?
The journey from Shanghai to Longjudong was obviously mainly on expressways. The total journey of 1,044 kilometers took 12.4 hours. This result is unacceptable to some car enthusiasts; assuming that 900 kilometers of the 1,044 kilometers were on expressways. On highways, if tested according to the maximum speed limit of 120km/h, these 900 kilometers should take 7.5 hours, and the remaining 100 kilometers should not take 4.9 hours. Therefore, it seems that there are not many tests with low speeds throughout the journey. High gold content.
I thought so at the beginning, but analyzing the results seems to have a different conclusion.
The maximum speed limit on the highway is indeed 120km/h, but it is impossible to maintain a constant speed throughout the entire process; it is inevitable to encounter normal congestion during the process, or other vehicles driving side by side and slowly overtaking, etc. Moreover, the speed limit on some highway sections is objectively low. In particular, the speed limit in tunnels is only 80km/h, and some sections with complex terrain will be lower than 100km/h.
Therefore, it is impossible to maintain the vehicle speed at the standard line of 120km/h during the highway test. The average speed can theoretically reach about 100km/h, which is considered normal. If
is calculated according to this standard comprehensive test duration, it takes 12.4 hours to combine the test mileage of 1044 kilometers. The overall commuting efficiency is objectively low but still within a reasonable standard; so this round of testing has a certain gold content and can be used as a driver. A reference for drivers with a more conservative style.
Fixed speed of 90km/h is close to CLTC but can be converted
There are three modes for vehicle cruising range and energy consumption testing. CLTC is the national standard, NEDC is the European standard, and WLTC is the international standard. In the three test modes, the realistic evaluation should be CLTC is the loosest, and its test results are more in line with the commuting standards of urban comprehensive ring roads. To put it bluntly, it does not include too many highway driving tests, nor does it include ultra-high-speed energy consumption tests exceeding 130km/h under WLTC conditions; but the cruising ranges announced by all electric vehicles now are test values under CLTC conditions. , so there is nothing wrong with Weilai Li Bin testing according to the rough standards of this model. After all, no one will be the first to break the balance.
"Gold content" is a concept that is difficult to define. NIO Li Bin's ET7 endurance test standard is generally closer to CLTC, and the remaining mileage finally announced is also clearly "CLTC mileage"; so this round of testing at least shows that NIO is To be honest, the test results can also be used as a reference. After all, the conversion ratio of CLTC/WLTC is not difficult to calculate.
The standard for the cruising range obtained by testing the same vehicle under WLTC operating conditions is generally 75% of the result obtained by testing under CLTC operating conditions.
means that the results of testing under WLTC working conditions will be reduced by about 25%.
Students who pay attention to new energy vehicle technology basically understand this knowledge point, so NIO Li Bin’s test is actually equivalent to giving multi-mode test results, but it requires one more round of conversion; it is calculated based on the test results of 1044 kilometers , it is estimated that the vehicle's WLTC cruising range can reach 783 kilometers.
Assuming that the car’s WLTC pure electric mileage is 783 kilometers, is this result good or bad?
I believe there is no need to say more here. A car can have a cruising range of close to 800 kilometers, which is close to the real standard. Even if it is placed in the fuel vehicle camp, it is considered a pretty good result; so NIO is equipped with a 150kWh battery pack. The practicality of ET7 is indeed not low. From this perspective, another conclusion can be drawn, that is, such a test does have some gold content. As spectators, we should not only focus on the test mode. As long as there are multiple test modes and there is a convertible relationship between them, then the test results will be enough to explain the problem.
All in all, NIO Li Bin’s cruising range test is a perfect ending, and the results obtained will be helpful in shaping the brand image.
Editor: Tianhe Auto-Automotive Science Island, published by Tianhe MCN, welcome to like and comment
