Electric car split-type automatic power distributing charging system

Abstract

The invention discloses an electric car split-type automatic power distributing charging system which comprises a central control cabinet and direct current buses. The charging central control cabinetis equipped with a central controller, a power distributing unit, a relay control unit and eight sets of charging power modules. The direct current buses comprise eight positive pole current buses and one negative pole current bus. Output of each set of charging power module is connected with the four corresponding positive pole current buses, and each positive pole current bus is connected witha charging terminal. The charging terminals communicate with the central controller through CAN buses. The central controller controls starting and stopping of the charging power modules through the CAN buses. The power distributing unit calculates the equipped number of the charging power modules according to the charging current request, and the corresponding charging power modules are started.The relay control unit calculates power distributing factors according to groups of the charging terminals and the charging power modules, and corresponding high-voltage direct-current contactors aredriven to act. According to the electric car split-type automatic power distributing charging system, power can be automatically distributed, and no idle power module is occupied.

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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