Abstract:The contradiction between global resources, environment, population growth and economic development is becoming increasingly acute, and it is necessary to seek to establish a new model of coordinated development between man and nature while adhering to the development of material civilization. All countries have taken measures to adjust the industrial structure and improve energy efficiency. In order to strengthen the control of air pollution and reduce energy consumption, implement the urban low-carbon development strategy, and strengthen the planning and construction of urban electric vehicle charging facilities, relevant guidance, financial subsidies and construction management specifications have been issued one after another. The development of electric vehicle industry is an important direction of the national new energy strategy, the construction of perfect charging facilities is the premise of the realization of electric vehicle industrialization, the construction of charging facilities and the development of electric vehicles complement each other, promote each other.
The development status of charging piles at home and abroad
With the rapid development of the global new energy vehicle market, the demand for charging piles has also increased significantly, and countries in the global market have introduced relevant policies, and a new report by the International Energy Agency (IEA) shows that the global number of electric vehicles will be held by 2030 It will reach 125 million units, and the number of ev charging stations installed will increase. At present, the main markets for new energy vehicles are concentrated in the United States, France, Germany, Norway, China and Japan, based on three dimensions: electric car charging pile distribution, market situation and operation mode.
Charging pile concept and type
At present, there are two main modes of energy supply for electric vehicles: self-charging mode and battery swapping mode. These two modes have been tried and applied to varying degrees in the world, among which there are relatively many studies and experiments on the self-charging mode, and the battery replacement mode has also begun to receive attention in recent years. The self-charging mode specifically includes two types: conventional charging and fast charging, and the following will briefly explain the concept and types of charging piles in the self-charging mode.
The electric vehicle charging station is mainly composed of pile body, electrical car charging module, metering module and other parts, with functions such as electric energy metering, billing, communication, and control.
Charging pile type and function
The charging pile charges the corresponding electric vehicle according to different voltage levels. The charging principle of the ev charger is that after the battery is discharged, it will pass through the battery with direct current in the opposite direction to the discharge current to restore its working ability, and this process is called battery charging. When the battery is charged, the positive pole of the battery is connected to the positive pole of the power supply, and the negative pole of the battery is connected to the negative pole of the power supply, and the charging power supply voltage must be higher than the total electromotive force of the battery. EV charging stations are mainly divided into DC charging piles and AC charging piles, DC charging piles are commonly known as “fast charging”, which mainly transforms AC power through power electronics related technologies , rectification, inverter, filtering and other processing, and finally obtain DC output, provide enough power to directly charge the electric vehicle battery, the output voltage and current adjustment range is large, can achieve the requirements of fast charging, AC charging station is commonly known as “slow charging” is the use of standard charging interface and AC grid connection, through conduction for the on-board charger to provide AC power to the electric vehicle battery of charging devices.
Post time: Jun-27-2025
