Central Broadcasting Network, Beijing, January 23 (Reporter Li Simo) According to the”News Evening Peak” report by China Voice of China Central Radio and Television, new The energy vehicle industry is known as the “outlet” of 2020. Not only are the valuations of a large number of auto companies in the capital market reaching new highs, but also various types of electric vehicles driving on the road have countless fans with their excellent appearance and performance. . However, since the winter of last year (2020), the cruising range has been greatly reduced, the charging time is too long, and the supporting facilities are inconvenient, which have exposed many ills in the new energy automobile industry.
On the one hand, consumers’ growing enthusiasm for buying new energy vehicles, on the other hand, is the “mileage anxiety” generally escalated by car owners. In the cold winter, can the embarrassment of new energy vehicles’ “fear of cold” be solved ?
For new energy vehicles, cruising range is an important criterion for measuring its value, and it is also a selling point for manufacturers to compete for the market. With the advancement of technology, the cruising range of new energy vehicles continues to increase. However, driving in the cold winter,”mileage anxiety” is still an inescapable trouble.
In Beijing, after entering the winter, the cruising range of many new energy vehicles has generally been reduced by 20%to 30%, and some have even been reduced by more than half. The situation of car owners queuing for charging at charging stations is also higher than before more serious.
Beijing new energy vehicle owners:(Endurance) The target is 480 kilometers, and the winter temperature is around zero, which is only 230 kilometers, which is half.
Beijing new energy vehicle owner:This model has a battery life of 570 kilometers. This one is full, and it actually runs about 400 kilometers.
Other car owners said that due to battery performance, they cannot”willfully” turn on the warm air in winter. If they are farther away, they will worry about”not going back”, and”mileage anxiety” will be affected in winter. Zoom in quickly. So, why are batteries”fear of cold”? Why does the mileage of pure electric vehicles decrease in winter? Huang Shan, co-founder of Electric Vehicle Observer, explained:”power battery is actually quite sensitive to temperature, especially in low temperature conditions. The ternary battery is still a lithium iron phosphate battery. When the temperature is low, the chemical reaction activity in the battery will decrease, and the decrease in activity will cause As the internal resistance becomes larger, its actual capacity will become lower, and it will also affect our charging time and shorten it.”
Moreover, car owners will use air conditioners in the cold season. For heating equipment, Huangshan said, most of the current pure electric vehicles use electric drives and electric heaters as heat sources, and consume more energy. Big.”Electric vehicles do not have engines like fuel vehicles, which can draw the waste heat of the engine into the cockpit, but electric vehicles cannot. Electric vehicles use electric air conditioners, and they also use electricity from power batteries. Especially in the north. It’s so cold, in addition to air conditioning, there are also electric heating seats, steering wheels, etc. All in this car uses electricity, which increases the overall power consumption.”
How to solve Is the new energy vehicle”fear of cold” the problem? Huang Shan said that some heat preservation measures can be used to reduce the sharp drop in battery temperature. In addition, high-efficiency heating technology can also be used as an appropriate supplement. Huang Shan said:”Many models now use heat pump air conditioning, so it consumes less energy than traditional electric air conditioning. Nowadays, many OEMs’ battery compartments have added some insulation materials, which will extend the battery temperature drop rate as much as possible. Other methods, such as pre-heating when charging, will first heat up the battery temperature. Then increase the charging speed.”
Huangshan also suggested that new energy car owners can alleviate”anxiety” by changing their usage habits when the technology has not yet broken through. Huang Shan said:”Our usual driving habits may need to be changed, such as no longer stepping on the accelerator, or frequent acceleration and deceleration. These actions are less, to save the electricity usage in the car, and use the air conditioner to keep it at a relatively comfortable temperature. It is also a relatively low mode for power consumption.”
In fact, new energy vehicle owners have always had”mileage anxiety”. In addition to”fast power loss in winter”,”the actual mileage does not match the publicity” and other issues have been plagued by both supply and demand. It is understood that the current range of pure electric vehicles on the market is based on NEDC operating conditions. This is a test standard developed in Europe in the 1970s for fuel vehicles. Compared with the true range, it will 10%-15%higher, which exacerbates the user’s perception of false winter cruising mileage.
Starting from 2021, my country will gradually implement a new new energy vehicle mileage test standard-WLTC test standard, which is characterized by collecting real driving condition data on a global scale and increasing urban congestion. The proportion of working conditions. Cui Dongshu, secretary general of the National Passenger Car Market Information Association, said that the mileage data obtained by this method is closer to the actual driving experience of the vehicle. In the future, in addition to optimizing the test, the most fundamental thing is to strengthen the technology research and development of the power battery. This will increase the battery’s mileage and completely eliminate consumers’ mileage anxiety. Cui Dongshu said:”The changes in testing standards have brought many new challenges to companies, enabling auto companies to further consolidate their product foundations and make products more in line with consumers’ travel habits, rather than the so-called endurance in an ideal state. It will bring good consumer credit to the entire auto market.”