Electric automobile charging/discharging/storing integral station power flow three-level converter

A technology of electric vehicles and converter devices, which is applied in the field of converters, can solve the problems of affecting the cycle life of batteries, failing to meet fine charging, and affecting the efficiency of battery balanced charge and discharge, etc., to achieve the goal of improving cycle life and optimal charging Effect

Inactive Publication Date: 2013-04-03
上海长浦新电能源有限公司
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  • Abstract
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Problems solved by technology

Most of the current battery charging devices adopt a two-stage structure, which is directly composed of AC/DC and DC/DC circuits. Due to the different types of rechargeable batteries, the remaining capacity of the battery is different, and the requirements for charging current are also different. Under the...

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  • Electric automobile charging/discharging/storing integral station power flow three-level converter
  • Electric automobile charging/discharging/storing integral station power flow three-level converter
  • Electric automobile charging/discharging/storing integral station power flow three-level converter

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] see figure 1 , a power flow three-stage conversion device for electric vehicle charging, discharging and storage integrated power station, including: a first-stage AC / DC circuit 1, a second-stage DC / DC circuit 2, a third-stage DC / DC circuit 3 and a control part 4. The first-stage AC / DC circuit 1 is connected to the power grid on the AC side, and connected to the main DC bus on the DC side, and is used to convert the AC power of the grid into stable DC power and transmit it to the main DC b...

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Abstract

The invention provides an electric automobile charging/discharging/storing integral station power flow three-level converter. A control part controls the working of circuits at all levels through a grading coordination control strategy, a first-level alternating current (AC)/direct current (DC) circuit alternating side is connected to an electric network, a direct current side is connected to a total direct current bus, the alternating current of the electric network is converted to the stable direct current and is output to the total direct current bus, a second-level DC/DC circuit high-voltage side is connected to the total direct current bus, a low-voltage side is connected to a corresponding branch direct current bus, the direct current of the total direct current bus is converted to finer direct current which can meet charging requirements of different cells and is output to a corresponding branch direct current bus, a third-level DC/DC circuit high-voltage side is connected to a corresponding branch direct current bus, a low-voltage side is connected to a storage battery group, and the storage battery group is controlled to charge/discharge evenly, finely and reasonably. The cell group can charge and discharge evenly, the best charging effect is achieved and the circulation service life of cells is improved.

Description

technical field [0001] The invention relates to a converter, in particular to a power flow three-stage converter for an electric vehicle charge-discharge-storage integrated power station. Background technique [0002] The electric vehicle charging and discharging integrated power station integrates battery charging and discharging, battery replacement and battery energy storage. It is one of the mainstream designs that have attracted much attention in the electric vehicle energy supply platform. Purpose The energy conversion device is a high-tech complex integrating power supply technology, power electronics technology, software technology, and control technology. Its development will inevitably provide considerable market demand for the development of these technologies and promote the development of technologies in related fields. Most of the current battery charging devices adopt a two-stage structure, which is directly composed of AC / DC and DC / DC circuits. Due to the dif...

Claims

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Application Information

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IPC IPC(8): H02M7/04H02M7/219H02M3/155H02J7/10
Inventor 解大冯俊淇杨敏霞娄宇成房新雨刘高维贾玉健
Owner 上海长浦新电能源有限公司
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