Whenever the popularization of electric vehicles is mentioned, it will be scorned by the majority of northern car owners. Not to mention riders in the "north of 40 degrees north latitude" area. This is a winter can be cold to the traditional fuel vehicles to be prescribed to use the "0W" series of oil zone... Beijing, China, is located on the 40th parallel north, so basically "north of Zhangjiakou" is "north of 40 degrees north latitude". "There is a kind of come to the northeast to try ah" This sentence is the most questioned words I have ever heard of electric cars, there is no one!
No way, it's too cold there, so when the electric car gets there, the endurance will "break the bone". You said that you want a chess game all over the country to electric vehicles, it is really "concubines can't do it"! ——Then the problem comes: everyone knows that electric vehicles can't work in the northeast at all, but to what extent "no" is" seems to have been studied by no one.
Media Office "Winter Tram Endurance Evaluation"
As a result, the actual endurance "broken bones" are very embarrassing
So a while ago, a famous domestic automobile media took a large number of electric vehicles and ran to the Hulunbuir Grassland in Inner Mongolia to "do things": at a temperature of -15 ~ -20 ° C, the actual endurance of electric vehicles was measured. Then compare the measured results with the official mileage announced by the manufacturer (THEODC endurance parameters of the Ministry of Industry and Information Technology) to see how big the gap between "reality and ideal" is.
However, after a round of actual measurements, the results are not optimistic. The actual "ice and snow cruising" mileage of the models participating in the test only accounts for about 45% to 60% of the endurance parameters of the NIDC of the Ministry of Industry and Information Technology, and the average is about 50%. So this test verified a sentence: what electric vehicle to the northeast of the cold winter, the endurance must be discounted in half!
NEDC lasts specific test environments
Just fell into the tram "comfort zone"
After the media "made things", the "passionate" riders expressed their dissatisfaction: car companies are not responsible, you said good mileage, why can only run half of the actual measurement? In fact, this is essentially a huge numerical difference caused by different test systems.
For example, the "NIDC endurance parameters of the Ministry of Industry and Information Technology" are tested in the laboratory, and the standard experimental temperature has been constant at about 23 ° C (within the range of 15 ~ 25 ° C), and you are in Hulunbuir in winter, is there a comparison of -15 ~ -20 °C? Lithium batteries are inherently lower the temperature, the worse the performance! Jun does not see our "three northern provinces" brothers and sisters, in the winter out of the mobile phone power are whizzing down, full power mobile phone in the outdoors can not last 3 hours, why?
So to be fair, it's hard to blame automakers for the "untruthfulness" of the numbers given. But the endurance of electric vehicles is affected by the environment is too great! Therefore, we have always insisted that the electric vehicle industry should unify and update the industry standard for the endurance measurement of electric vehicles, and this standard should deliberately avoid the "comfort zone" of electric vehicles.
A test method for "data beauty"
It may not be reasonable or desirable
For example, in the past, many electric vehicle companies, when promoting mileage, would use "60km/H empty car uniform speed endurance" as a selling point. But we know that this is the "most comfortable and power-efficient" operating state for electric vehicles. But this kind of "designing a targeted test program for the sake of beautiful data" is meaningless to us consumers except that it is good for car companies to promote products!
To this end, we have spent a lot of time to "design" a set of "actual endurance measurement methods for electric vehicles" (referred to as "thinking") for the characteristics of electric vehicles (such as higher speed, higher energy consumption, lower temperature and shorter endurance, etc.). The specific immediacy is published as follows, and I very much hope that readers can express their own views and ideas, speak freely, and throw bricks and stones.
Tram endurance tests are specific
"Think" project & explain
Experimental temperature: -5 °C - The reason for setting this temperature point is to refer to the fuel supply law of diesel vehicles in winter. :-5°C is the cold filter point for -10 diesel (the actual minimum temperature is used). The -10 diesel cold filter point usually used in winter is -5 °C, and when the ambient temperature is lower than -5 °C, gas stations around the country provide -20 diesel. -5°C is below freezing, but it's not too cold, so this temperature point is not extreme.
Experimental site: high-speed ring road - referred to as "high ring", the vehicle in the ring road at a uniform speed, continuous driving. This avoids fluctuations in energy consumption caused by complex vehicle speed and load changes. Driving in a circular road can offset the drag error caused by wind, so it can ensure the consistency of data for multiple experiments.
Experimental speed: 130km/H - This is based on the actual speed limit of high speed in China and abroad. China's high-speed maximum speed limit of 120km/H, and most European countries maximum speed limit of 130km/H, in fact, this coincides with the most mainstream international 2 sets of speed limit systems (75 mile system and 80 mile system) We take a high value of 130km/H, this value for 120km/H, also just fell into the "speed within 10% range".
Experimental load and electrical load: full load, full load of additional systems - the air conditioning system temperature is at 25 ° C (the default temperature point of the human body in "Ergonomics"), all the lights and electrical equipment (such as audio, etc.) of the whole car are turned on and running, to ensure that the rest of the additional systems except the traction system of the whole car are in full load conditions.
Experimental method: In the full power state of the vehicle, after completing the experimental preparation, start to accelerate with a "full throttle" attitude, the speed of the vehicle continues to accelerate from 0km/H to 130km/H, and then maintain a uniform speed of 130km/H until the vehicle instrument displays "low power alarm" (in this state, the vehicle enters the "limited power" working condition, and the experiment is over). Recording the mileage of the vehicle "insisting" is the final result.
The law of tram energy consumption has a special nature
Combat tests should be realistic
In fact, the driving conditions designed in this set of "want to settle" are more in line with the actual long-distance working conditions that riders in the southern and central regions of China may encounter during the Spring Festival: the car is full of passengers, the trunk is stuffed with New Year goods, the lights are fully lit when driving at night, the air conditioner is blowing a small wind, the car plays a small song, there is talk and laughter along the way, and there may be occasional slight speeding...
"Thinking" is basically to meet the actual needs of such a car, to see how far the electric car can run under such conditions of use. Maybe this number will be ugly, even embarrassing, but it's expensive in the truth, you say? Wait to see your wonderful ideas come to life! Let's talk!
New energy car owners scan the code to receive free car wash