motors, especially battery electric vehicles, all car manufacturers are seeking to develop, and the automotive industry is an irresistible trend. However, pure electric vehicles currently still have drawbacks unresolved. In response to increasingly stringent emissions regulations, many automobile manufacturers have begun to develop electric vehicles.
However, sales of battery electric vehicles still negligible. In 2019 new cars sold worldwide, the share of electric vehicles is only about 2%. While automobile manufacturers being a huge investment, but for some reason, did not accelerate the popularization of electric vehicles, let’s look at why this is.
The first problem is not as cell density of gasoline. This means that the battery takes up more space than fossil fuels to achieve the same power. 3.7 liters of gasoline is equal to 33.7 kilowatts-hour of energy. In short, some small compared with the current of the entire battery pack SUV 7 liters of gasoline can produce more energy.
However, it should be noted that the electric car has a higher efficiency than conventional internal combustion engine vehicles. Currently, the most efficient internal combustion engine having a thermal efficiency of 40%, the remaining 60% by heat or friction disappear. On the other hand, most of the electric motor can be 90% of the energy as a power transmission, which is a distinct advantage.
However, such a highly efficient motor, due to external factors such as cold weather and driving conditions, in actual driving efficiency is greatly reduced. For example, the battery will drain quickly in cold weather.
The problem is that the battery pack is heavier than the fuel tank and more complex. Electric cars need to add more batteries to ensure adequate mileage, which takes up a lot of space and increase the weight of the car.
particularly in the US market, interest in electric pickup truck is increasing. Tesla is developing a pure electric truck, for example, if you load more of the battery to ensure adequate mileage, you must reduce the load capacity can transport, which sacrificed itself truckLoading effect. Tesla explains that this car can travel 800 kilometers, but I think it’s loading capacity will be greatly shrink.
may also affect the energy density of electric trucks are currently being developed. Of course, towing trailers will increase fuel consumption. Ordinary petrol or diesel truck will spend a lot of fuel, but life is not a problem, because a large tank, you can quickly refuel. However, when the electric pickup truck boxes, remaining battery power will be greatly reduced, mileage will be reduced, and charging takes a long time problem is magnified.
clear that electric vehicle technology is being developed, beginning this year, there are already a lot of companies would like to announce the development of the electric field of commercial vehicles, but electric commercial vehicles still need to solve many problems.