Are electric cars afraid of high speed? Acceleration from 100 kilometers can be biggest scam

At present, many people use electric vehicles as a means of transportation in cities, but on highways, many of cars we see are gasoline-powered vehicles, and there are very few electric vehicles, not only because car owners are worried about range, including some questions about safety of electric vehicles themselves, and unnecessary doubts about acceleration data for 100 meters, etc. So, let's see why electric cars are afraid to drive at high speeds? Are data on acceleration per 100 meters correct or not?

According to public information, owners of fuel-powered vehicles are most afraid of traffic jams when commuting to work in urban areas. Watching fuel consumption skyrocket from 12 to 18, driving in traffic consumes fuel like drinking water, but they all prefer to drive to high speed because it can effectively solve problem of carbon deposits in the engine and, more importantly, can reduce fuel consumption. car fuel that kills two birds with one stone

Firstly, car owners who use electric vehicles to drive at high speed will be very afraid and feel insecure, because when buying electric vehicles, official range can be 300 km, but in our actual driving process, it can only be 260 km. along track, there are too many uncertainty factors, there are still some discrepancies between data and reality, there are no suitable charging piles in service area, or traffic jams, etc., will make electric vehicle owners very concerned, so they are very afraid of electric vehicles to drive on track.

It is reported that there are two main reasons for shortened life of high-speed electric vehicle batteries. One is that purely electric vehicles use a single-stage geared motor. To meet requirements of high-speed driving; secondly, huge windward area leads to terrible energy consumption when driving at high speed. The force of air resistance that must be overcome at a high speed of 120 km/h is 8 times greater than at 60 km/h;

In addition, car owners are also concerned about risk of high-temperature spontaneous combustion caused by high-speed movement of electric vehicles, not exceeding 200 degrees, and at same time releasing extremely active nascent oxygen during heating of battery, which enhances possibility of internal combustion of power battery. If a fire starts, it will spread rapidly and be difficult to extinguish.

Looking at press conferences of new car companies such as Tesla and Weilai, acceleration from 100 kilometers to 100 kilometers is undoubtedly a commendable performance. Compared to standard version of Tesla Model 3, acceleration from 100 kilometers to 100 kilometers is 5.6 seconds, and acceleration from 100 kilometers to 100 kilometers for long version is 5.1 seconds. When launching Weilai ES8, it was emphasized that its 100 kilometers acceleration is 4.4 seconds. The launch of FF91 by Jia Yueting has been increased to 2.39 seconds. It feels like a Tesla model for sale;

However, acceleration performance from 100 km depends on weight of car body, as well as torque and power of car engine. On one hand, this requires electric vehicles to reduce weight, which limits configuration of power batteries and gearboxes, which limits increase in vehicle range; on other hand, an increase in engine power is required, which can only be achieved through a high-discharge mode of operation, which will reduce actual range of car. In addition, electric vehicles are at risk of spontaneous combustion at high speeds, and acceleration rate of 100 kilometers seems like a chicken rib;

The official EV 100m acceleration data is still ideal state. In process of driving EVs, mileage continues to decrease and battery power continues to weaken, which will inevitably cause acceleration difficulties; in addition, weight of electric vehicle itself and performance of battery, including configuration of gearbox, etc., will affect efficiency of 100-meter acceleration, which will also affect safe driving of electric vehicle. vehicles on highway.

Perhaps before revolutionary breakthrough of power battery materials, electric vehicles were more suitable for congested city trips because there would be no unnecessary waste of energy when stopped at a red light, and electricity used by air conditioner comes directly from battery pack. The purchase is coupled with benefits of energy recovery braking will likely make range longer and longer. Most importantly, charging infrastructure in city is relatively complete, so there is nothing to worry about about power supply.

In general, electric vehicles are afraid to go to high speeds, mainly due to low mileage, lack of ideal charging equipment, and too many factors that interfere with 100-meter acceleration, reducing margin of safety of electric vehicles. . Therefore, current use of electric vehicles in urban travel is relatively practical.