wireless charging system

Abstract

The invention discloses a wireless charging system which is provided with a transmitting terminal and a receiving terminal. The transmitting terminal is at least provided with a transmitting terminalpower supply system and a transmitting terminal controller, and the receiving terminal is at least provided with a receiving terminal power-on system and a receiving terminal controller. The transmitting terminal further comprises a transmitting terminal detection system. The receiving terminal further comprises a receiving terminal detection system; the transmitting terminal detection system comprises a signal generator, a driver, a transmitting circuit and a detection transmitting coil which are communicated in sequence; the receiving terminal detection system comprises a detection receivingcoil, a detection circuit and an auxiliary charging circuit, one of the detection circuit and the auxiliary charging circuit is communicated with the detection receiving coil, the auxiliary chargingcircuit comprises an auxiliary power supply, and the auxiliary power supply is connected to the receiving terminal controller. In the working range, mutual inductance is generated between the detection transmitting coil and the detection receiving coil. On the one hand, alignment judgment during wireless charging can be realized, and on the other hand, the auxiliary power supply can be powered toensure 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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