Enabling control method and output voltage control method of DC high and low voltage converter

Abstract

The invention provides an enabling control method and an output voltage control method of a DC high-low voltage converter (DC‑DC Converter), which belong to the technical field of hybrid electric vehicles. In the enabling control method, it is determined whether to open or close the DC high-voltage and low-voltage converter by judging whether certain conditions are met, so as to realize the protection of the high-voltage power battery. In the voltage output control method, the output voltage is set by judging the working mode of the DC high-voltage and low-voltage converter, which has the characteristics of intelligence and low energy consumption, and can protect the low-voltage battery and the DC high-voltage and low-voltage converter.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and relates to a DC high and low voltage converter, in particular to an enabling control method and an output voltage control method of the DC high and low voltage converter. Background technique [0002] With the continuous deterioration of the global environment and the shortage of energy sources, reducing air pollution and dependence on petroleum energy has become an issue of increasing concern to all countries. In order to reduce environmental pollution and relieve energy pressure, research on energy-saving and environment-friendly automobiles has become an inevitable trend in the development of automobile industry in various countries. At present, the research and production of hybrid electric vehicles has become the first choice of the automobile industry in various countries. A hybrid vehicle is a combination of a motor and an engine, which can realize hybrid functions su...

AI Technical Summary

Problems solved by technology

[0005] However, in the traditional control method of DC high-voltage and low-voltage converters, the enabling control (that is, the control of the open or closed state) of the DC high-voltage and low-voltage converters does not take into account factors such as relevant input parameters and the condition state of the high-voltage power battery itself, so It may cause damage to the high-voltage power battery (such as over-discharge); in the output voltage control of the DC high-low voltage converter, factors such as the detection signal, the working mode of the DC high-low voltage converter, and the condition of the low-voltage battery itself are not considered, so There is a possibility of damage to the DC high-voltage converter and the low-voltage battery (such as overcharging)

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