Of three introduced the electric car battery charging mode

Source: 2020 - 04 - 6 now hits: three of the electric car battery charging mode at present, the electric car charging infrastructure construction progress seriously affected the mass popularization and application of electric cars in our country. This article through to the domestic and foreign electric vehicle charging mode and family analysis and research of the distributed energy storage model, proposed can effectively alleviate and solve the electric car charging difficult technical solutions. The electric car is the main battery lithium batteries. There are three kinds of traditional charging ways: fast charging and fast replacement battery pack. The electric car charging 1) Conventional charge ( The slow charge) Mode. Normal ac power charging is the most common way of charging electric cars. When charging, low current and power, charging time is 5 ~ 8 hours, commonly affect battery life and power grid. Use of vehicles recharged at valley power at night, can lower the cost electricity. But due to the charging time is longer, need to configure the charger with ac/dc conversion functions. Charging take up parking Spaces for a long time. When a vehicle emergency power supply requirements, it is difficult to meet the needs of the owner. 2) The rapid ( Emergency) Charging mode. Through dc charging pile, vehicles can be quick charge large current, 10 - Battery storage capacity can reach more than 80% in 15 minutes. Charging stations generally need to set up charging pile, an alternating current through the charging system of the power grid inverter device into direct current, to recharge electric cars. High 'large current charging voltage, usually can be several times or even more than ten times that of the conventional charge current, relatively short charging time. Quick charge reduced power battery cycle life. When vehicle centralized charging, have a certain influence on power grid. Cars often need to charging stations nearby, can be used to supplement the traditional charging mode. 3) In electric mode. Will run out of battery direct replacement for a full charge the battery pack, time needed for replacement battery for 5 ~ 10 minutes, to a certain extent, make up for the electric vehicle charging time is too long. Power battery can usually lease, in order to reduce the initial purchase cost. After replacement of power battery has adequate maintenance time, can charge the battery in the off-peak hours, this to improve the cycle life of battery, reduce the power consumption cost has positive significance. However, due to various kinds of electric vehicles and USES different size, there are also many differences in design, so it is difficult to realize the battery pack 'series' unified standardization and generalization. In electric mode need to build a standard in power plant, to prepare a lot of spare battery. Land demand is big, long construction period, large capital investment and other issues. The model is only applicable to specific line interval operation specific vehicles, its scope of application is very limited.