Ground terminal mode soft switching method and system for wireless charging system of electric vehicle

A wireless charging, electric vehicle technology, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., to avoid sudden changes in voltage, increase the voltage regulation range, and avoid overvoltage and overcurrent.

Pending Publication Date: 2022-04-15
XUJI GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will cause the inverter output current Iin to have a large overcurrent, triggering system protection
Similarly, since the output voltage of the full-bridge mode If you switch from full half-bridge mode to full-bridge mode, the same problem will exist

Method used

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  • Ground terminal mode soft switching method and system for wireless charging system of electric vehicle
  • Ground terminal mode soft switching method and system for wireless charging system of electric vehicle
  • Ground terminal mode soft switching method and system for wireless charging system of electric vehicle

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Embodiment Construction

[0052] 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 combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0053] Such as figure 2 as shown, figure 2 The topology of the electric vehicle wireless charging system designed for the present invention. The system includes a ground-side device and a vehicle-side device. The ground-side device includes a PFC circuit (Vienna circuit), a full-bridge inverter circuit, and a transmitting coil. The car-end device includes a receiving coil and a rectifier circuit.

[0054] The first...

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PUM

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Abstract

The invention discloses a ground terminal mode soft switching method and system of an electric vehicle wireless charging system. The method comprises the steps of receiving terminal voltage Us of a to-be-charged vehicle; calculating a ground terminal voltage Up required when the charging efficiency is optimal according to the vehicle terminal voltage Us; and determining the working mode of the full-bridge inverter circuit at the ground end according to the ground end voltage Up, and performing soft switching to the corresponding working mode. According to the invention, through soft switching among three operation modes of the inverter H bridge, wide-range adjustment of the output voltage Up of the ground end device is realized, the adjustment process is smooth and impact-free, the problems of voltage abrupt change, current impact and error protection caused in the mode switching process are avoided, and the stability and reliability of operation of the device are guaranteed on the premise of saving a first-stage Buck circuit.

Description

technical field [0001] The invention relates to the technical field of electric vehicle wireless charging, in particular to a method and system for soft switching of a ground terminal mode of an electric vehicle wireless charging system. Background technique [0002] With the development of new energy sources, the application of electric vehicles is becoming more and more popular. There are currently two ways to charge electric vehicles, wired charging and wireless charging. Traditional wired charging requires a cable connection, and the charging gun needs to be plugged in and out manually during charging. The metal contact surface of the charging gun will wear out after long-term use, requiring regular maintenance, and poses a certain safety hazard to people. However, wireless charging does not have the above problems. As wireless charging technology becomes more and more mature, its advantages such as convenient operation and high safety are gradually revealed. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/12H02M7/5387H02M1/32
CPCY02T10/70Y02T10/72Y02T10/7072Y02T90/14
Inventor 来璐冯宇鹏董晓帅朱兆芳李潇夏月王林王先为
Owner XUJI GRP
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