TU-TESL

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With the increasing popularity of electric vehicles, consumers' cognitive understanding of electric vehicles is also changing. But when choosing a car, it seems that the longer the pure electric range, the more secure it is. But in fact, more and more manufacturers and industry experts emphasize more: rational endurance demand. Why can't the current endurance mileage be 1000 kilometers or even longer? How to treat the endurance mileage rationally? What is the real endurance demand of electric vehicle users? Reason 1: only stacking can't effectively improve the endurance of the notebook computers we know are lithium batteries. Although these batteries are not small in size and weight, they still can't make the computer run at full load for even half a day. The lithium battery used is similar to the laptop, and the demand for electricity is greater. Increasing the number of battery packs can increase the endurance of electric vehicles, but blindly increasing the power battery will make the volume and weight of the battery uncontrollable, affect the performance and space of the vehicle, and make the income of increasing the battery lower and lower until there is no income. At present, the battery weight of mainstream pure electric vehicles accounts for 20% - 30% of the total vehicle weight. In other words, 20% - 30% of the increased battery capacity is used to drag the weight of the battery itself. Moreover, the proportion will only increase with the increase of batteries. Not only the endurance mileage, but also the vehicle weight is closely related to the dynamic performance of the whole vehicle. If the body is too heavy, braking, acceleration, steering and other aspects will be hindered. It's not only hard to drive, it even affects driving safety. Therefore, it is not feasible to increase the range of the battery. For this reason, automobile manufacturers, especially joint-venture brands, will be more balanced in the setting of endurance mileage, and the technical route will be more focused on comprehensive endurance mileage, operation and safety. Reason 2: the energy density of power battery is limited. In addition to stacking batteries, another way to increase the endurance mileage is to increase the energy density of batteries, that is, to increase the capacity of batteries per unit weight. At present, there are also a variety of different energy density cells available in the market. The mainstream energy density from low to high includes ncm333, ncm523, ncm622, ncm811, etc. The figure represents the proportion of three elements in the ternary lithium battery, and the difference of energy density per kilogram of four batteries is about 5%. However, the higher the energy density is, the lower the stability of the cell is, and the easier it is to lose control of heat. That's why the mainstream joint ventures in the market choose more stable power cells because of the stringent global supplier access standards and test standards, and can't achieve a high endurance mileage. For example, there is no car model matching the ncm811 battery, and the leading EV also uses the ncm622 battery pack with high thermal stability. For two reasons, stacking batteries and increasing the energy density of batteries are unable to significantly increase the endurance mileage at present, so it is more reasonable to choose a pure electric vehicle suitable for your daily travel needs. The daily commuting travel mileage is relatively short, and the endurance mileage is not an obstacle for the consumers who choose electric vehicles. At present, most of them are used as daily commuting family cars. According to the big data report of Tencent's first tier cities, more than 95% of the residents in Beijing, Shanghai, Guangzhou and Shenzhen have an average daily commuting radius of less than 25 kilometers, and an average commuting radius of 8-10 kilometers. So taking into account the power consumption, the use of air-conditioning and other comfortable equipment, as well as the driving style of each person caused by the difference in mileage, 300-400 km or so is more reasonable for consumers who use electric vehicles in urban environment. In order to minimize the long-distance demand, it is not economical to spend more money and drag heavy large capacity batteries. At present, there are many pure electric vehicles with a range of 400 kilometers on the market. Many manufacturers have launched products for home use, such as song Pro EV, Xiaopeng G3, and joint venture brands have also been working in the pure electric compact market since last year. It is worth noting that Ford's leading ev went on sale in August 2019. The compact SUV it aims at is a very accurate market, With a reasonable range, we emphasize the quality, safety and large space of the joint venture. The above models are all priced at about 150000-200000, which is suitable for the commuting needs of urban families. Convenient charging service is the real antidote to mileage anxiety. If you consult the owners who have used electric cars, their answers will refresh most people's concepts. They will tell you that what you really need to care about is the charging facilities network and charging service, compared with the pure mileage. In fact, the radius of daily life activities of each person and each family is regular and searchable. Within the radius, what is needed is the combination of convenient public charging network (parking lot of office building, large shopping mall) and family. Without convenient charging service, no matter how long the mileage is, it is meaningless. Therefore, in addition to giving home charging piles to owners with parking spaces, various vehicle enterprises have also established their own public charging pile network through self construction or cooperation with suppliers. For example, it has access to about 100000 third-party charging piles, basically covering the main core cities and roads in the country; Weima has integrated the mainstream charging piles through the "i.e. passenger line" app; Ford's "Ford pie" app plans to access more than 150000 public charging piles information in the country, covering more than 300 cities in the country, which can be found every 3 kilometers in key cities such as Beijing, Shanghai, Guangzhou and Shenzhen To connect with "Ford group" and provide the industry's first "use first, pay later" charging experience. In addition to the convenience of public charging, charging service is also a point of differentiated competition. Weima provides mobile service vehicle and emergency charging service, while leading EV provides charging service package, which includes seven service contents, such as vehicle pick-up and delivery, free unlimited public charging and unlimited times of charging for customers. Put down anxiety, rational consumption to sum up, when considering pure electric vehicles, endurance mileage is not the only factor to be considered. Brand and charging service are important variables. In order to enjoy the comfortable family life brought by pure electric vehicles, charging service and convenience are as important as endurance mileage. After all, in today's convenient refueling, we don't think that the endurance mileage of large displacement fuel vehicles will be one of the most important factors for car purchase. From fuel vehicles to electric vehicles, the use habits in essence have not changed, but the adaptation process is different, but the rational consumption and the car experience of living without anxiety are consistent.