Enabling control method and output voltage control method of direct current-direct current converter (DC-DC converter)

Abstract

The invention provides an enabling control method and an output voltage control method of a direct current-direct current converter (DC-DC converter), and the methods belong to the technical field of hybrid electrical vehicles. According to the enabling control method, the DC-DC converter is turned on or turned off by judging whether some conditions are met, so that a high-voltage power battery is protected. According to the voltage output control method, the output voltage is set by judging the working mode of the DC-DC converter, the method has the characteristics of intelligentization and low energy consumption, and a low-voltage battery and the DC-DC converter are protected.

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, the condition state of the high-voltage power battery itself, and so on. 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 May cause damage to the DC high-voltage converter and low-voltage battery (such as overcharging)

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