The main purpose of fast charging is to increase the charging power of the entire vehicle. In order to increase the charging power of the entire vehicle, the technical means either increase the charging current or increase the charging voltage. Increasing the charging current means thicker and heavier wire windings, greater heat generation, and more bottlenecks in the auxiliary equipment.
High voltage has the advantages of higher design flexibility and a wide range of fast charging. The transformation of 400V into 800V has become a mainstream trend. The voltage range of the denmark number data urrent mainstream new high-voltage electrical system for automobiles is generally 230V-450V, taking the average value of 400V, which is commonly called 400V system; and with the application of fast charging, the voltage range of the high-voltage electrical system of the vehicle reaches 550-930V, taking the average value of 800V, which can be commonly called 800V system.
2. architecture is moving towards 1000V/500A
In the early stages of promoting electric vehicles, consumers did not pay much attention to the charging speed of electric vehicles. The main way to recharge electric vehicles was slow charging, and the DC charging voltage/current was generally lower than 350V/125A. With the rapid increase of electric vehicles and the continuous increase of battery capacity, the original charging efficiency can no longer meet the needs of users.
The whole vehicle platform voltage
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