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Vehicle-to-grid (V2G)-technology-based vehicle-mounted charging and discharging device and control method thereof

A charging and discharging device and technology, applied in the direction of circuit devices, battery circuit devices, emergency protection circuit devices, etc., can solve problems such as high cost, low efficiency, complex circuit structure, etc., to improve efficiency, simplify structure, and increase input power effect of factors

Inactive Publication Date: 2011-08-24
SOUTHEAST UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, for how to realize the interactive power supply between electric vehicles and the power grid, most of the existing technologies have complex circuit structures, high costs, and low efficiency. Therefore, it is necessary to propose an economical and effective on-board charging and discharging device to promote V2G technology and smart grid technology. development of

Method used

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  • Vehicle-to-grid (V2G)-technology-based vehicle-mounted charging and discharging device and control method thereof
  • Vehicle-to-grid (V2G)-technology-based vehicle-mounted charging and discharging device and control method thereof
  • Vehicle-to-grid (V2G)-technology-based vehicle-mounted charging and discharging device and control method thereof

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Embodiment Construction

[0018] In order to make the content of the present invention more obvious and understandable, further description will be made below in conjunction with the accompanying drawings and specific embodiments.

[0019] combine figure 1 Shown is a structural flow chart of a preferred embodiment of the present invention, a vehicle charging and discharging device based on V2G technology includes a power grid of the power input part, a battery, a grid-side controller and a grid-side converter, and the battery-side control converter and battery-side converter, as well as the AC-side voltage measurement module and the AC-side current measurement module whose input end is connected to the busbar of the power supply input part, and the DC-side voltage measurement module whose input end is connected to the busbar between the grid-side converter and the battery-side converter, The input terminal is connected to the battery-side voltage measurement module and battery-side current measurement ...

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Abstract

The invention relates to a vehicle-to-grid (V2G)-technology-based vehicle-mounted charging and discharging device and a control method thereof. The device comprises a power supply input part, a battery, a power grid side controller, a power grid side converter, a battery side controller and a battery side converter, wherein the power supply input part, the power grid side converter and the battery side converter are connected with the battery in turn; the battery side controller adopts a hysteresis loop comparison control mode and compares voltage and current amount which is detected in real time with the set value, and a duty ratio of the battery side converter is subjected to hysteresis loop output control, so that Boost chopped wave conversion during constant current, constant voltage charging and grid connection is realized; and the power grid side controller adopts a double closed loop control mode of a voltage outer ring and a current inner ring to realize charging adaptation and grid-connected inversion of the power grid side converter. The device overcomes the defects that the traditional bidirectional converter circuit is complex in structure, high in cost and low in efficiency in the V2G technology, and the requirement of operating the same circuit in two working modes is met.

Description

technical field [0001] The invention relates to a power equipment technology of an electric vehicle, in particular to a vehicle-mounted charging and discharging device based on V2G technology and a control method thereof, which can realize two-way interaction and exchange with a power grid. Background technique [0002] With the increasingly prominent energy problems and environmental pollution, replacing traditional internal combustion engine vehicles with electric vehicles has become one of the current research hotspots. Battery charging and discharging technology is the key technology for the development of electric vehicles, but traditionally, the grid only charges electric vehicle batteries. Due to the large capacity and charging and discharging power of electric vehicle batteries, charging tasks can only be completed at special charging stations. Bring great inconvenience to charging. At the same time, for electric vehicles parked for a long time, not only the energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/10H02J3/38H02H7/18H02M7/797
CPCY02B70/10Y02E40/40
Inventor 樊英薛钟兵韩学栋程明
Owner SOUTHEAST UNIV
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