"Battery life anxiety" was once a negative emotion that people often encountered when using electronic products such as mobile phones and laptops because the power was too small to meet normal use, and as pure electric cars began to become popular, this anxiety also spread to the automobile market.
The reasons for this are as follows:
First of all, the current new energy vehicles in the power battery technology has fallen into a bottleneck, it is difficult to make a substantial breakthrough in the mileage, the actual mileage of 500 kilometers driven by full power is basically the upper limit of most electric vehicles, and in terms of charging efficiency, pure electric vehicles cannot be compared with "plus and go" fuel vehicles.
Secondly, from the perspective of the development of domestic charging infrastructure, the charging pile system has not yet achieved full popularization, and lacks a mature charging business model, which is far from the fuel vehicles available at gas stations everywhere.
Therefore, "charging difficulty" is still a major problem in front of new energy car owners, and endurance has naturally become the most important parameter when buying a car.
In order to reduce consumer anxiety when buying a car, so that everyone can intuitively understand the endurance performance of pure electric vehicles under actual working conditions, the state also began to implement an indicator called "CLTC (China light-duty vehicle test cycle) comprehensive working range" in October last year to replace the familiar NEDC working range.
When it comes to NEDC, everyone must not be unfamiliar, in the era of fuel vehicles, the average fuel consumption measured under NEDC conditions is often an important reference indicator when we buy a new car.
Its test logic and principle is to complete a complete working cycle through the simulation of the driving state of the vehicle under various road conditions, and measure its average fuel consumption, generally including a suburban /high-speed working condition, and four urban working conditions, with a total mileage of about 10 kilometers.
Test vehicles will complete the test at different speeds, and include conventional driving operations such as acceleration, uniform speed, deceleration, and stop, but because most of their tests are completed in the laboratory, their test temperature will be fixed in a certain range, and air conditioning, headlights, audio, seat heating systems, etc. will be turned off.
The fuel consumption measured in this way naturally deviates from the actual situation, coupled with the fact that this set of NEDC working conditions simulation is derived from Europe, and the mainland is more complex traffic situation, some water and soil are not satisfied, which also makes the fuel consumption under NEDC working conditions become a chicken rib indicator in the eyes of consumers, and even many people think that manufacturers use to fool consumers.
As a result, many countries and regions have improved and introduced new test standards on the basis of THE NEDC working condition test, such as WLTC, EPA cycle test in the United States, etc. Although these new methods have extended the test time, comprehensively considering the roll-stop load of the vehicle, etc., and the impact of the use of electrical appliances in the car has also been added to the test, but it is still unable to accurately simulate the real domestic driving environment.
It was not until last year that the "China Automotive Test Cycle CATC" developed by the Ministry of Industry and Information Technology was officially implemented, which changed the previous situation. The standard is for different models, a total of 8 test conditions, of which our common CLTC conditions, is one of the indicators reflecting the working conditions of light passenger cars.
However, it is interesting that many people who eat melon have found that the endurance of many pure electric models on sale, after this so-called "Chinese standard" test, is actually higher than the previous NEDC endurance, which makes many people question this so-called new test method.
For example, Tesla's Model 3 Performance model, in the previous NEDC conditions of 605km, and after switching to CLTC working conditions test cycle, it turned out to become 675km, and in the case of battery capacity is almost the same, the mileage has been greatly improved, obviously because of changes in endurance test standards.
According to common sense, since the new test method is closer to the actual road conditions in China, the measured endurance should be worse than the previous test results in the ideal state.
But it's actually a good explanation.
The biggest difference between the CLTC working condition test cycle and THE NEDC is that because it is designed for China's road conditions, its test focus is naturally on the performance of low and medium speeds in the case of vehicle "congestion", including idle speed, frequent acceleration and deceleration and other common urban driving operations, which has become the focus of the test.
And this happens to be the inherent advantage of the tram with the "kinetic energy recovery" system, so the mileage of the pure tram tested is naturally longer than the "smooth" simulation method of NEDC.
However, at present, the CLTC test does not consider other factors that affect the test variables such as turning on the air conditioner, so its endurance test results are still quite different from the actual battery life, but in the manufacturer's publicity, this information is often not mentioned, which will also mislead the judgment of consumers to a certain extent.
But even so, whether it is an official endurance test standard such as NEDC or CLTC, it still has its significance. If even the CLTC endurance is low, then the actual endurance must be worse. Therefore, as long as the CLTC endurance is not used as an absolute value of reference, but as a reference standard for horizontal comparison, its role is obvious.
Taking a step back, if there is no official test standard mentioned above, let some "unscrupulous car media" carry out the so-called endurance measurement, the results measured in this way may be more unreliable than the CLTC, and consumers will become more anxious.