DC-DC intelligent control module for new energy automobile and control method thereof

Abstract

The invention discloses a DC-DC intelligent control module for a new energy automobile and a control method thereof. An ECU controller judges according to collected current and voltage output by a high-frequency rectifier filter circuit, a temperature value signal of an inverter power tube, and the minimum current, the maximum current, voltage and temperature in the ECU controller, and then gives out a control signal to an inverter control circuit; and the inverter control circuit controls an inverter circuit though an inverter drive circuit to change the output of the inverter circuit and carries out intelligent monitoring and protection on the DC-DC conversion process by the intelligent control module, thus improving the efficiency of DC conversion and enhancing product reliability.

Description

technical field [0001] The invention relates to a DC-DC intelligent converter for new energy vehicles and a control method thereof. Background technique [0002] In electric vehicles, it is necessary to convert the high voltage of the main battery system into a low voltage of 13.8V to charge the battery of the low-voltage system. The traditional DC-DC conversion module mainly consists of an inverter circuit, a high-frequency transformer, a high-frequency rectifier circuit and a voltage stabilizing circuit. The entire voltage conversion process is controlled by the hardware circuit, and the input DC voltage is converted into another DC voltage output. The DC-DC conversion completely composed of hardware circuits only has two working states of on and off, and cannot be used for DC - DC conversion for regulation, there will be a lot of time when the electric vehicle does not need DC-DC conversion work, which increases power loss, and the long-term working state also reduces the...

AI Technical Summary

Problems solved by technology

[0002] In electric vehicles, it is necessary to convert the high voltage of the main battery system into a low voltage of 13.8V to charge the battery of the low-voltage system. The traditional DC-DC conversion module mainly consists of an inverter circuit, a high-frequency transformer, a high-frequency rectifier circuit and a voltage stabilizing circuit. The entire voltage conversion process is controlled by the hardware circuit, and the input DC voltage is converted into another DC voltage output. The DC-DC conversion completely composed of hardware circuits only has two working states of on and off, and cannot be used for DC -DC conversion for regulation, there will be a lot of time when the electric vehicle does not need DC-DC conversion work, which increases power loss, and the long-term working state also reduces the reliability and service life of the DC-DC converter

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