A charging system and method for a charging device developed based on a range extender

Abstract

The invention discloses a charging system developed based on a range extender for a charging device and a method. The problem is solved that the range extender is influenced by drastic change of demanded power of charging piles and thus fluctuates drastically. The charging system is characterized by comprising a charging pile, a communication device, the range extender in communication with the communication device, a rotation speed torque distribution module in a control terminal, and a rotation speed torque database in the control terminal. By the adoption of the charging system developed based on the range extender for the charging device and the method, the range extender can actively determine the output power according to the condition of the range extender so that the output power of the charging pile can vary with the output power of the range extender, accordingly, the transmission time of a message of an engine end is shortened, the defect of slow response of the engine is overcome, and the phenomenon is avoided that the range extender is passively influenced by the demanded power of the charging pile, cannot adjust own output power timely, then fluctuates drastically andis even directly powered off.

Description

technical field [0001] The invention relates to the field of electric vehicle charging, in particular to a charging system and method for a charging device developed based on a range extender. Background technique [0002] At present, pure electric vehicles and plug-in hybrid electric vehicles are being rapidly industrialized, so upright charging piles and wall-mounted charging devices have become popular. [0003] The input side of the traditional charging pile is connected to the grid, the input power is infinite, and the output power only depends on the charging demand of the vehicle being charged, without considering the power of the input side. However, the charging pile developed based on the range extender is limited by the working environment. When the power battery of the whole vehicle is connected, once the demanded power of the charging pile fluctuates sharply (that is, sharply increases or decreases), specifically, the demanded power of the charging pile decrease...

AI Technical Summary

Problems solved by technology

[0003] The input side of the traditional charging pile is connected to the grid, the input power is infinite, and the output power only depends on the charging demand of the vehicle being charged, without considering the power of the input side. However, the charging pile developed based on the range extender is limited by the working environment. When the power battery of the whole vehicle is connected, once the demanded power of the charging pile fluctuates sharply (that is, sharply increases or decreases), specifically, the demanded power of the charging pile decreases sharply (currently, it is mostly unloaded when charging is completed or the charging pile fails. When the torque is unloaded), due to the engine response time limit, the range extender cannot respond to the power change of the charging pile in time. At this time, the load of the range extender suddenly becomes 0, but the actual output power does not decrease in time, that is, the load is small, and the range extender If the output power of the inverter is large, the engine will overspeed, and then enter the overspeed protection and shutdown due to failure. When the demand power of the charging pile rises sharply, the range extender cannot respond to the power change of the charging pile in time due to the limitation of the engine response time. The load of the remote controller increases, but the actual output power does not increase in time, that is, the load is large and the output power is small, and the engine will be crushed

[0004] To sum up, it can be seen that the range extender is affected by the rapidly changing demand power of the charging pile, and it is prone to violent fluctuations or even a direct shutdown phenomenon, and there is still room for improvement.

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