Vehicle-mounted charging device with wide-range output voltage

Abstract

The invention provides a vehicle-mounted charging device with a wide-range output voltage. The vehicle-mounted charging device comprises a main control unit, an AC-DC converter and a DC-DC converter,wherein the AC-DC converter is connected with an alternating-current power grid and the DC-DC converter, and is used for converting the alternating current output by the alternating-current power gridinto primary direct current and the outputting primary direct current to the DC-DC converter; the main control unit is connected with an external system, the AC-DC converter and the DC-DC converter,and is used for collecting alternating current, primary direct current and target direct current, receiving control signals output by the external system, and generating a first switch control instruction according to the control signals, the alternating current, the primary direct current and the target direct current to control the DC-DC converter; the external system comprises a battery management system and /or a complete machine control system; the DC-DC converter is connected with the AC-DC converter and a battery and is used for converting the primary direct current into a target directcurrent according to the first switch control instruction and outputting the target direct current to the battery; and the DC-DC converter comprises a bridge arm module, wherein the bridge arm modulecomprises a first bridge arm, a second bridge arm and a third bridge arm.

Description

technical field [0001] The invention relates to the field of on-board charging, in particular to an on-board charging device with a wide range of output voltages. Background technique [0002] With the rapid development of the global economy, the increasing energy consumption and environmental pollution have attracted more and more attention from all countries. Among them, the proportion of energy consumed by automobiles is also increasing. At the same time, the pollution caused by automobile exhaust is also a difficult problem to solve, and it is the main source of PM2.5 exceeding the standard in many cities today. However, automobiles are an indispensable part of people's normal life and work. Therefore, the automobile industry will face enormous challenges--excessive energy consumption, low conversion efficiency, and severe environmental damage caused by excessive exhaust emissions. Because new energy vehicles can use energy more efficiently, and the pollutant emissions...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of poor applicability of current vehicle-mounted chargers, an embodiment of the present invention provides a veh

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