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Vehicle-mounted bidirectional charger for electric automobile

A technology for electric vehicles and chargers, applied in electric vehicles, battery circuit devices, collectors, etc., to achieve the effects of saving social energy and user costs, reducing the risk of electric shock, and efficient conversion performance

Active Publication Date: 2011-10-19
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, with the development of smart grid technology (Smart Grid), although the above-mentioned methods of using electric vehicles and hybrid electric vehicle power batteries have brought convenience to people to a certain extent, due to the existing electric vehicles, hybrid electric vehicle power The battery only has the charging function and cannot be used as a distributed generator (Distributed Generator) application

Method used

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  • Vehicle-mounted bidirectional charger for electric automobile
  • Vehicle-mounted bidirectional charger for electric automobile
  • Vehicle-mounted bidirectional charger for electric automobile

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] see figure 1 As shown, the bidirectional on-board charger of the present invention is mainly composed of a full bridge bidirectional AC / DC converter on the grid side, a dual active half bridge bidirectional isolated DC / DC converter on the battery side, a microprocessor control circuit and an electromagnetic interference filter ( EMI filter) composition.

[0029] Specific circuits such as figure 2 As shown, the main circuit of the dual active half-bridge bidirectional isolated DC / DC converter on the battery side is composed of S 1 , S 2 , S 3 , S 4 Four semiconductor power switch tubes...

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Abstract

The invention provides a vehicle-mounted bidirectional charger for an electric automobile. The charger comprises an alternating current (AC) / direct current(DC) converter, a DC / DC converter, a microprocessor control circuit and a filtering circuit, wherein one end of the AC / DC converter is connected with a power grid through the filtering circuit and the other end of the AC / DC converter is connected with a battery pack through the DC / DC converter; and the microprocessor control circuit is connected with the AC / DC converter and the DC / DC converter respectively. Energy can be reasonably transformed between the power grid and a power battery by utilizing a peak-valley difference of the power grid, and social energy and user cost are effectively saved; and an isolated double active half-bridgebidirectional DC / DC converter is adopted on a battery side, so that the whole system has higher safety, the electric shock hazard for a user is reduced, and the conversion performance is efficient and stable.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an on-board bidirectional battery charger (On-board Bidirectional Battery Charger) for electric vehicles with multiple functions of power generation and charging. Background technique [0002] With the increasing shortage of global petrochemical energy, new energy vehicle technologies represented by electric vehicles (Electrical Vehicle) and hybrid electric vehicles (Hybird Electrical Vehicle) are booming. The number of various types of electric vehicles and hybrid vehicles is not only increasing rapidly, but also the capacity of their energy storage power batteries is also increasing. In the current use of electric vehicles and hybrid electric vehicle batteries, people usually use charging equipment to extract electric energy from the grid to charge the battery when the electric energy of the power battery is about to run out. For example, people can choose to charge ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02M3/335H02M7/5387H02J7/02
Inventor 夏必忠窦吉庆和军平王明旺孙威郑伟伟赖勇智
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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