Bidirectional vehicle-mounted battery charger integrated with DC/DC and electric vehicle

Abstract

The invention provides a bidirectional vehicle-mounted battery charger integrated with DC / DC and an electric vehicle. The bidirectional vehicle-mounted battery charger integrated with the DC / DC comprises a PFC circuit, a OBC circuit, a DC / DC conversion circuit and a controller, wherein the input end of the PFC circuit is used for being connected with an external power supply, the input end of theOBC circuit is connected with the output end of the PFC circuit, the output end of the PFC circuit is used for being connected with a high-voltage power battery of the electric vehicle, the input endof the DC / DC conversion circuit is connected with the output end of the PFC circuit, the output end of the DC / DC conversion circuit is used for being connected with the low-voltage load of the electric vehicle, the controller is correspondingly connected with the PFC circuit, the OBC circuit and the DC / DC conversion circuit, and is used for correspondingly controls the PFC circuit, the OBC circuitand the DC / DC conversion circuit to achieve energy transmission among the external power supply, and the high-voltage power battery and the low-voltage load. The bidirectional vehicle-mounted batterycharger integrated with the DC / DC is light in weight, high in DC / DC conversion efficiency, and an inverter discharging function is achieved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a DC / DC integrated bidirectional on-board charger and an electric vehicle. Background technique [0002] With the gradual increase in the requirements for energy saving and emission reduction, the electrification of vehicles has become one of the main development directions of the automotive industry, and lightweight and integrated to a certain extent can improve the battery life of electric vehicles and reduce the power consumption of the whole vehicle. On-board chargers and DC / DC converters are important components of electric vehicles. At present, a considerable number of electric vehicles use integrated on-board chargers and DC / DC converters, but most of them are physically integrated and heavy. Can not achieve the goal of lightweight. A small part uses a deeply integrated design at the electrical level, which can greatly reduce the weight, but there is a problem o...

AI Technical Summary

Problems solved by technology

On-board chargers and DC / DC converters are important components of electric vehicles. At present, a considerable number of electric vehicles use integrated on-board chargers and DC / DC converters, but most of them are physically integrated and heavy. Unable to achieve lightweight goals

A small part uses the deep integration design at the electrical level, which can greatly reduce the weight, but there is the problem of low conversion efficiency of the DC / DC converter

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