Electric vehicle wireless charging system

Abstract

An electric vehicle wireless charging system comprises a power sending device and a power receiving device. The power sending device comprises a power sending controller, a primary coil, and a parking platform. The power sending controller can measure the charging power and move the parking platform. The power receiving device comprises a secondary coil which is connected with a battery through a control circuit. The control circuit comprises a rectifier circuit, an over-current protection circuit, a reverse-connection protection circuit, an over-temperature protection circuit, a temperature compensation circuit, and an over-charge and over-discharge protection circuit. The position of a vehicle can be adjusted automatically according to the charging efficiency, and the whole charging system is safe and reliable.

Description

technical field [0001] The invention relates to the field of wireless charging, in particular to a wireless charging system for electric vehicles. Background technique [0002] The electrification of trams has become the development trend of the entire automobile industry, and the charging of electric vehicles accompanied by this trend has increasingly become a hot topic in modern research. There are two main ways of charging: first, directly use the power adapter to connect to the mains; Second, use the principle of electromagnetic induction for non-contact charging. The problem of the former is that it is inconvenient, because the garage generally does not provide users with power supply sockets, so the owner must find a way to connect the wires, which leads to cumbersome wiring, and at the same time, there are potential safety hazards due to the power supply through wiring and plugging; the problems of the latter are , because the problem of parking space will lead to lo...

AI Technical Summary

Problems solved by technology

The problem of the former is that it is inconvenient, because the garage generally does not provide users with power supply sockets, so the owner must find a way to connect the wires, which leads to cumbersome wiring, and at the same time, there are potential safety hazards due to the power supply through wiring and plugging; the problems of the latter are , because the problem of parking space will lead to low charging efficiency, the layout of the power transmission device is mostly designed on the ground, which is convenient for the adjustment of charging efficiency, but at the same time it limits the driving space of the car, which is not easy to promote in the underground garage. The location is directly related to the charging efficiency. If the car moves under certain circumstances, it will affect the charging efficiency. However, the existing wireless charging device does not have an effective device to prevent this phenomenon.

[0003] The existing wireless charging system is not stable enough and is greatly affected by factors such as temperature, overcharge, overdischarge, and overcurrent.

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