Protective circuit applied to wireless power supply system and wireless power supply system

Abstract

The invention discloses a protective circuit applied to a wireless power supply system and a wireless power supply system. The wireless power supply system comprises a transmitting terminal, a transmitting terminal control unit, a receiving terminal and a receiving terminal control unit, wherein the receiving terminal is connected with a load. The protective circuit is arranged between the receiving terminal and the load. The protective circuit comprises a voltage detection unit, a discharge unit and a control signal output unit, wherein the voltage detection unit is connected with the receiving terminal, the discharge unit and the control signal output unit, the discharge unit is further connected with the receiving terminal, and the control signal output unit is further connected with the receiving terminal control unit. The wireless power supply system is provided with the protective circuit between the receiving terminal and the load, thereby not only ensuring that no damaged is imposed on the load when the load voltage is too high in charging, but also cutting off a power supply of the transmitting terminal so as to protect a transmitting terminal circuit, and improving the safety performance of the whole wireless power supply system.

Description

technical field [0001] The invention relates to the technical field of wireless power supply, in particular to a protection circuit applied to a wireless power supply system and the wireless power supply system. Background technique [0002] With the advancement of science and technology, wireless power supply technology has been greatly developed. The wireless power supply system usually includes a transmitter, a switch for controlling the transmitter, a transmitter control unit for current and power, a receiver, and a switch for controlling the receiver. terminal control unit. At present, the receiving end of the high-power wireless power supply system is mainly implemented in the form of an LC series resonant circuit. The main feature of the LC series resonant circuit is that the current in the circuit is very large. In addition, in the prior art, the power and current of the receiving end are mainly controlled by controlling the current and power of the transmitting end...

AI Technical Summary

Problems solved by technology

In addition, in the prior art, the power and current of the receiving end are mainly controlled by controlling the current and power of the transmitting end, but when the load of the receiving end is a battery, if the overcurrent protection of the transmitting end is damaged or the transmitting end and the receiving end do not match at all, then In order to avoid damage to the battery, it is necessary to power off the battery, but directly cutting off the charging battery will cause damage to the transmitter

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