High and low frequency ripple current suppression method in electric vehicle in-vehicle single-phase charging system

A charging system and electric vehicle technology, applied in the direction of electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problem of not considering the high frequency current ripple of the auxiliary battery, so as to suppress the low frequency/secondary ripple current, reduce the The effect of cost and vehicle space, good friendliness

Active Publication Date: 2019-11-12
TIANJIN UNIV
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned integrated secondary ripple suppression methods, the auxiliary battery charging converter plays a key role, but these methods do not consider when charging the auxiliary battery high frequency current ripple and still require additional energy storage components

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High and low frequency ripple current suppression method in electric vehicle in-vehicle single-phase charging system
  • High and low frequency ripple current suppression method in electric vehicle in-vehicle single-phase charging system
  • High and low frequency ripple current suppression method in electric vehicle in-vehicle single-phase charging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Topology

[0034] In the on-board charging system of electric vehicles, by rationally designing the charging topology for the auxiliary battery, the high-frequency ripple current suppression for the auxiliary battery (low-voltage battery) and the low-frequency power battery (high-voltage battery) single-phase PWM rectification charging can be realized. suppression of ripple current. The structure of power and auxiliary battery charging system is as follows: figure 1 shown.

[0035] figure 1 In the above, the power battery charger is composed of a single-phase PWM rectifier and a DC / DC converter. It works in the parking charging mode, and the power flow path is shown by the dotted arrow. The single-phase AC power supply u s One end of the input filter inductor L S One end is connected, the other end is connected to the power switch Q r2 source of the power switch Q r3 The drain is connected; the inductance L S The other end of the power switch Q r1 source of ...

Embodiment 2

[0068] Below to figure 1 The structure diagram of the power and auxiliary battery charging system in the electric vehicle on-board charging system shown, figure 2 and Figure 4 The topological equivalent circuit diagram of and image 3 and Figure 5 The principle and method of the present invention will be described with respect to the main characteristic waveforms of the topologically stable operation. The following describes the suppression of high-frequency ripple current when the power battery charges the low-voltage auxiliary battery and the suppression of low-frequency ripple current when the power grid performs single-phase PWM rectification and charging on the power battery.

[0069] 1. The principle and method of high-frequency ripple current suppression for auxiliary battery charging during driving

[0070] The duty cycle of the driving signals of all the power switch tubes of the converter is fixed at 0.5, and the power switch Q 1 -Q 6 The driving signal is S...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a high and low frequency ripple current suppression method in an electric vehicle in-vehicle single-phase charging system. The high and low frequency ripple current suppressionmethod in the electric vehicle in-vehicle single-phase charging system comprises the following steps: an electric vehicle in-vehicle single-phase charging system consisting of a power battery chargerand an auxiliary battery charger is constructed; the auxiliary battery charger is composed of a multi-function and isolated DC / DC converter; in a driving charging mode, a two-phase staggered parallellow-voltage side topological structure is constructed based on a Buck-Boost basic conversion unit in the auxiliary battery charger, zero output of current ripple is achieved through phase shifting by180 degrees between the basic units, and meanwhile, the low-voltage side topological structure can realize high-frequency rectification; the high-voltage side topological structure realizes the high-frequency inversion through the charge and discharge of an energy-storage capacitor and the cooperation of a power switch based on the Buck-Boost basic conversion unit; and in a parking charging mode,the active energy filtering of the capacitive energy storage type is realized by a high-voltage side bidirectional Buck-Boost unit in an isolated charging topology of the auxiliary battery, so as toachieve the charge and discharge of the energy-storage capacitor, and achieve the purpose of suppressing the secondary ripple voltage.

Description

technical field [0001] The invention relates to the field of topology and control technology of power electronics technology, in particular to a high- and low-frequency ripple current suppression method based on a single-phase PWM (pulse width modulation) rectification and charging system mounted on an electric vehicle. Background technique [0002] In recent years, with the rapid development of industry and economy in the world, the demand for fossil energy has increased rapidly, resulting in increasingly serious problems such as energy shortage and environmental pollution. Therefore, it has become an international norm to vigorously develop clean energy, promote energy transformation, and achieve sustainable green development. New energy vehicles use renewable energy instead of fossil fuels as the energy source, which is one of the effective ways to solve the problems of energy shortage and environmental pollution. Electric vehicles are an important part of the new energy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02J7/02H02M1/15H02M3/335H02M3/158B60L53/20
CPCH02M1/15H02M3/33576H02M3/1582H02M3/1584B60L53/20H02M3/1586Y02T10/70Y02T90/14Y02T10/7072
Inventor 张云方剑
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap