Vehicle-mounted type charging-power-adaptive charging-discharging circuit of electric vehicle

Abstract

The invention provides a vehicle-mounted type charging-power-adaptive charging-discharging circuit of an electric vehicle. Specific to the problem that switch of quick charging and slow charging cannot be realized in vehicle-mounted integrated type charging, the existing internal circuits and auxiliary devices of the electric vehicle, comprising two motor stator windings, two motor inversion circuits, cooling and mechanical apparatuses and the like and an additional inductive coil, are utilized to form variable inductance combinations along with the existing devices so as to realize adaption of the charging circuit to different charging power, wherein the vehicle-mounted type charging-power-adaptive charging-discharging circuit comprises a variable inductance combination 1 which consists of a stator winding of a rectifying side motor, an additional inductor 1 and corresponding contactors, a variable inductance combination 2 which consists of a stator winding of a direct current-direct current conversion side motor, an additional inductor 2 and corresponding contactors, and corresponding control circuits; and in addition, the charging-discharging circuit also needs contactors used for controlling, wherein the contactors comprise the fifth and sixth groups of contactors used for changing the rectifying side inductance value in charging, and the seventh and eighth contactors used for changing the direct current-direct current conversion side inductance value in charging.

Description

technical field [0001] The invention relates to a self-adaptive charging and discharging circuit for vehicle-mounted charging power of an electric vehicle. The circuit is used for charging an energy storage device of the electric vehicle and at the same time taking into account that the energy storage device supplies power to a motor. Background technique [0002] The charger in the electric vehicle is one of the key components for fast and flexible charging of the electric vehicle battery and to promote the technological progress and market promotion of electric vehicles. Its cost, volume, weight and performance have become the key and restrictive factors for its development. [0003] According to the relationship between the charging circuit and the motor drive circuit, the current in-vehicle chargers are divided into independent type and integrated type. The independent charging device is a completely independent charging device, which is input by an external AC 3-phase o...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an adaptive charging and discharging circuit for the vehicle-mounted charging power of electric vehicles, so as to solve the problem that the current vehicle-mounted charging circuit has poor adaptability to charging power.

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