A split-type automatic power distribution charging system for electric vehicles

Abstract

The invention discloses a split-type automatic power distribution charging system for an electric vehicle, which includes a centralized control cabinet and a DC bus. The busbars include 8 positive DC busbars and one negative DC busbar. The output of each charging power module is connected to 4 positive DC busbars. Each positive DC busbar is connected to a charging terminal. The charging terminal communicates with the centralized controller through the CAN bus. The centralized controller controls the start and stop of the charging power module through the CAN bus; the power distribution unit calculates and configures the number of charging power modules according to the charging current request, and starts the corresponding charging power module; the relay control unit calculates the power according to the group of the charging terminal and the charging power module Assign the factor and drive the action of the corresponding high-voltage DC contactor. The invention not only can automatically distribute power, but also does not occupy idle power modules.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a split-type automatic power distribution charging system for electric vehicles. Background technique [0002] At present, domestic charging facilities are developing in the direction of high power. Some companies have also developed intelligent charging piles with higher power levels, which can meet the charging requirements of different electric vehicle batteries. However, there are relatively few researches on distributed charging systems that can automatically distribute power. [0003] Battery charging is a complex process. The electric vehicle BMS will limit the charging current according to different battery SOC levels. As the current decreases, the charging power module does not work at the highest efficiency state, and the electric vehicle requires a large charging power during partial charging. However, there is no compensation, so there is a temporary use of resources,...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic charging facilities are developing in the direction of high power. Some companies have also developed smart charging piles with higher power levels, which can meet the charging requirements of different electric vehicle batteries. However, there are relatively few researches on distributed charging systems that can automatically distribute power.

[0003] Battery charging is a complicated process. The electric vehicle BMS will limit the charging current according to different battery SOC levels. As the current decreases, the charging power module does not work at the highest efficiency state, and the electric vehicle requires a large charging power during partial charging. However, there is no compensation, so there is a temporary use of resources, which leads to waste

[0004] At present, there are also split-type automatic power distribution charging systems on the market, but the power distribution does not realize power distribution in the true sense, and does not solve the problem of idle charging power modules

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