Communication interference suppression method suitable for a plurality of transmitting ends of wireless charging system

Abstract

The invention discloses a communication interference suppression method suitable for a plurality of transmitting ends of a wireless charging system. The wireless charging system comprises a power supply, the power supply supplies power to the plurality of transmitting terminals, and each transmitting terminal communicates with a receiving end performing electric energy transmission with the same through amplitude modulation waves, and the working frequency bands of the different transmitting terminals for performing amplitude modulation wave communication are different from each other. By adoption of the communication interference suppression method suitable for the plurality of transmitting ends of the wireless charging system, the communication interference between different charging subsystems is greatly reduced, the communication interference problem between different transmitting terminals is solved just in a software processing mode without adding any peripheral hardware, so thatthe cost is reduced, and the operation is reliable.

Description

Technical field [0001] The invention relates to the field of wireless charging systems, and in particular to a method for suppressing communication interference between multiple transmitting ends of the wireless charging system. Background technique [0002] The QI standard wireless charging system will have a communication package when it is working normally. The communication package is added to the transmitting coil in the form of an amplitude modulated wave. There will be amplitude changes on the transmitting coil. The amplitude change will affect the waveform on the power supply. The transmitting system is connected to the same power supply, which will cause communication interference and affect the normal operation of wireless charging. [0003] The currently known solutions use power supply filtering processing, the interference signal is a 2K communication signal, and the inductance, resistance, and capacitor network are used for filtering processing to reduce the interfere...

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Problems solved by technology

[0002] The QI standard wireless charging system will have a communication packet during normal operation. The communication packet is added to the transmitting coil in the form of an amplitude modulated wave. The amplitude of the transmitting coil will change, and the amplitude change will affect the waveform on the power supply. If multiple The transmission system is connected to the same power supply, which will cause communication interference and affect the normal operation of wireless charging

[0003] Currently known solutions use power supply filtering, the interference signal is a 2K communication signal, and the network of inductors, resistors, and capacitors is used for filtering to reduce the interference signal. This method needs to increase hardware costs and reduce system efficiency. Capacitors and inductances are large in size, which is not conducive to small-size applications, and filtering only reduces interference, but cannot completely eliminate interference

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