Wireless charging system

Abstract

The invention discloses a wireless charging system, which is provided with a transmitting end and a receiving end, and the receiving end further comprises a receiving end detection system; the transmitting end detection system comprises a signal generator, a driver, a transmitting circuit and a detection transmitting coil which are communicated in sequence; the receiving end detection system comprises a detection receiving coil, a detection circuit and an auxiliary charging circuit, wherein one of the detection circuit and the auxiliary charging circuit is communicated with the detection receiving coil; the detection receiving coils are at least arranged at two positions, and the detection transmitting coil is at least arranged at one position, and mutual inductance is generated between the detection transmitting coil and the detection receiving coil when the detection transmitting coil is in a working range; at most three detection receiving coils are arranged at one position and facedifferent directions, and at most three detection transmitting coils are arranged at one position and face different directions. On one hand, alignment judgment during wireless charging can be realized, and on the other hand, the auxiliary power supply can be powered to ensure normal operation of wireless charging.

Description

technical field [0001] The invention relates to the charging field, in particular to a wireless charging system. Background technique [0002] As an ideal power supply method for electric vehicles, high-power wireless charging has been rapidly developed and widely used in recent years due to its advantages of safety, convenience and high degree of automation. During wireless charging, the transmitting coil and the receiving coil need to be aligned as much as possible to obtain the maximum coupling coefficient and achieve the maximum energy transmission efficiency. Therefore, an alignment detection system is generally configured in an electric vehicle to provide coil alignment guidance for the driver or the automatic driving system of the vehicle. The alignment of the prior art generally uses the difference between the transmitted power and the received power to determine whether it is aligned. This method has a relatively small error. Large, and the impact of the environmen...

AI Technical Summary

Problems solved by technology

Therefore, an alignment detection system is generally configured in an electric vehicle to provide coil alignment guidance for the driver or the automatic driving system of the vehicle. The alignment of the prior art generally uses the difference between the transmitted power and the received power to determine whether it is aligned. This method has a relatively small error. Large, and it is also greatly affected by the environment

There are also some solutions where a camera is installed for alignment assistance, but in this way, the working environment of the camera is not easy to guarantee, and the cost is high

[0003] In addition, once the device being charged has no power at all, such as the level of an electric car, there will be no power to start the wireless charging function, because at this time the pairing, positioning, and interaction between the transmitting coil and the receiving coil cannot work. Eventually wireless charging doesn't work properly

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