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Electric automobile charger

A technology for electric vehicles and chargers, applied to electric vehicles, current collectors, battery circuit devices, etc., can solve the problems of inability to realize bidirectional flow of energy and low efficiency, and achieve the effects of light weight, improved heat distribution, and increased efficiency

Inactive Publication Date: 2013-12-04
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure is relatively inefficient, and cannot realize bidirectional flow of energy, providing two functions of on-board charging and portable power supply

Method used

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  • Electric automobile charger
  • Electric automobile charger
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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] In order to realize the bidirectional flow of energy and improve the power level of the converter, an embodiment of the present invention provides an electric vehicle charger, see figure 2 with image 3 , the electric car charger adopts a two-channel parallel structure, and the main circuit adopts a two-stage structure of uncontrolled rectification and BUCK type PFC.

[0026] The first channel includes: one end of the inductance group L1 (that is, the first inductance) is connected to an alternating current, and the other end is respectively connected to a capacitor group Cr (that is, the first capacitor) and an uncontrollable rectifier bridge circuit, and the capacitor group Cr is grounded; the uncontrollable rectifier bridge ...

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Abstract

The invention discloses an electric automobile charger. An uncontrolled rectifier and a BUCK type PFC two-stage structure are adopted in a main circuit, the charger is of a two-channel parallel structure, the power level of a convertor is improved, the heat distribution of the system is improved, the reliability of the system is improved, the service life of the system is prolonged, power factors of the system are greatly improved, and the power factors reach 0.998 in the stable status. A ZCS resonance circuit is adopted in the charger, soft switching of a switching element is achieved by controlling the matching of the communicating time of a Q1 and a Q4 and the resonant periods of a Cr and an Lr, and therefore the efficiency of the convertor is greatly improved. A switching tube Q2 and a switching tube Q3, and a switching tube Q5 and a switching tube Q6 form two bridge arms of an inverter circuit respectively, full-control type inversion is carried out by controlling communication signals of the switching tubes, and a single-phase alternating-current portable power source is provided. The requirements of the automobile charger for being small in size, light in weight and low in cost are met through the effective reuse of hardware.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle charger. The invention is used in the energy exchange link between the electric vehicle and the smart grid, especially through hardware multiplexing, using the same circuit to realize vehicle charging and portable power supply Two functions, so as to realize the two-way flow of energy, and by adding soft switching and PFC (power factor correction) functions, the system efficiency and power factor can be improved. Background technique [0002] Energy and environmental issues are becoming more and more prominent in today's world. As an effective solution to improve energy efficiency and reduce pollutant emissions, electric vehicles have been widely concerned. In recent years, along with the proposal and development of smart grid technology, a technology of two-way interaction between electric vehicles and smart grid has emerged as the times require. E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/10
Inventor 王议锋王成山李微车延博
Owner TIANJIN UNIV
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