Electric vehicles are a trend in the development of automobiles in the world today, but electric vehicles have not yet been widely used. Recently, a survey conducted by experts from the China Electric Power Research Institute showed that many people believe that the biggest bottleneck in the development of the new energy electric vehicle market is the lack of battery life, and it will not be able to run for a long time. Therefore, the purchase will is not high. The company’s willingness to produce also declines. So, how should we improve the battery life of electric vehicles?

First of all when raising the battery capacity. According to a survey conducted by a professional institution, only when the battery life is more than 300 kilometers, the new energy electric vehicle can be truly commercialized. The battery capacity and the battery's volume and quality become positive, so there is a contradiction: the battery is too heavy, the mileage certainly can not go up; the battery is too light, the battery capacity can not be made bigger. The key to improving the cruising range is the breakthrough in battery technology. Currently, as a mainstream technology, lithium iron phosphate batteries have inherent defects such as large size, heavy weight, slow charging, and short battery life. Therefore, there is still a long way to go before commercialization is required.

The second is to coordinate and resolve the interaction between the electric vehicle and the power grid. The impact of large-scale access of electric vehicles on the power grid is mainly divided into power quality impact, power supply capacity impact, and peak-to-valley difference. It is estimated that AC slow charging has a small impact on the distribution network. DC fast charging has a greater impact on the distribution network. It may cause partial overload of the power grid and congestion of the line. If there is not enough charging stations, it will make The peak value of the nodes on which the charging station is installed may be too heavy. In severe cases, the capacity of the transformer may exceed the capacity of the transformer, which may cause great harm to the power grid. The disorderly charging behavior of the large-scale electric vehicle in time and space may cause peaks in the power load peak. Phenomenon, increase the peak of the grid.

The third is to focus on the construction of a charging station and a quick charging station. Just as fuel cars need to build gas stations, charging cars do not need to establish charging stations. The rapid charging of electric vehicles irritates the instantaneous powerful power power, and the conventional power grid cannot satisfy the need for a dedicated charging network. The solution to the charging problem is that a car needs to be equipped with two batteries. When one battery is used up, another one is automatically switched. At this time, the used battery is replaced by the replacement station and a fully charged battery is installed. The replacement of the battery by the power station unified charging and maintenance, plus parking aids and other supporting means, to further promote the popularization of electric vehicles to play a positive role in promoting.

Therefore, the endurance capability of electric vehicles is the bottleneck of the development of electric vehicles. We must accelerate the development and application of interactive technologies between electric vehicles and the electric grid to achieve orderly charging and orderly discharge of large-scale electric vehicles; we must also apply information and communication technologies. Utilizing the energy storage characteristics of electric vehicles to realize the interaction between electric vehicles and the electric grid, and achieving two-way, real-time, and controllable flow of energy between electric vehicles and electric grid through two-way information interaction, so that the main electric vehicle users, power grid companies and automobile manufacturing can Enterprises achieve a win-win situation.