Charge-discharge two-way power converter for battery for electric car

Abstract

A charge-discharge two-way power converter for a battery for an electric car adopts the structure that an input port (In) connected with a storage battery and an output port (Out) connected with a grid are mounted outside a main circuit; the main circuit is connected with a control circuit; the main circuit comprises a battery side filter circuit (1), a like-polarity bi-directional DC/DC converter (2), and a high-frequency isolation DC/DC circuit (3), a three-phase three-level circuit (4) and a grid side filter circuit (5) which are sequentially connected; and the control circuit comprises a DSP main controller (6), an MCU auxiliary controller (7) and an LCD or 485 communication circuit (8). According to the invention, the circuit adopts comparatively less elements, the intelligent degree is high, self detection and fault protection functions are provided, the equipment and operation costs are saved, the conversion efficiency is high, the working process is quick, stable, and controllable, the size is small, the dynamic property is good, and the purposes of environmental protection and energy conservation are achieved.

Description

technical field [0001] The invention relates to a circuit device or system for power supply or power distribution under the international patent classification H02J and an electric energy storage system technology, especially a bidirectional power converter for charging and discharging an electric vehicle battery with subdivided process intervals under the trademark. Background technique [0002] Among the known technologies, although electric vehicle technology is rapidly rising along with the new energy industry, more and more attention has been paid to the maintenance and maintenance of electric vehicle batteries, especially its battery-related charging and discharging technology has received widespread attention as an important key technology. The inverter is a kind of power conversion device, which mainly realizes the energy conversion from AC to DC. Usually, the charger needs to have rectification and step-down functions; the inverter is a kind of energy conversion devi...

AI Technical Summary

Problems solved by technology

[0006] In the existing technology, there are few disclosures of applied technical methods. For example, the patent application number 201110161670 is a large-scale centralized energy storage intelligent charging and discharging system for electric vehicle power batteries, which solves the problems of scattered charging of power batteries and inability to fully utilize energy.

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