Wireless charging receiving apparatus, wireless charging system and charging control method thereof

Abstract

The invention relates to a wireless charging receiving apparatus, a wireless charging system and a charging control method thereof. The wireless charging receiving apparatus includes: a frequency modulation control module, a receiving resonance sensing module and a receiving control module. The frequency modulation control module is intended for pooling a plurality of preset states, detecting the peak value of a first output end of the receiving resonance sensing apparatus, and obtaining the best state from the polled preset states; the receiving resonance sensing module is intended for, on the basis of the best state, setting capacitance value in LC resonance so as to regulate the resonance frequency of the LC resonance, outputting the largest charging current by regulating and controlling a second output end, the LC resonance being formed in the receiving resonance sensing module; and the receiving control module is intended for conducting DC conversion on the largest charging current and then outputting the largest charging current that undergoes DC conversion to a to-be-charged load. According to the invention, the wireless charging receiving apparatus enables the resonance frequency of a receiving end to approach the resonance frequency of a transmitting end, thus increasing the efficiency of wireless charging.

Description

technical field [0001] The present disclosure relates to the technical field of wireless charging, and in particular to a wireless charging receiving device, a wireless charging system and a charging control method thereof. Background technique [0002] At present, the wireless charging technology has been widely used in the charging process of the terminal equipment, for example, the WPC (Wireless Power Consortium, wireless power consortium) technical standard. [0003] The WPC technical standard uses the receiving end to magnetically induce the current generated by the sending end, controls the wireless charging system to output charging current to the load to be charged, and at the same time the receiving end feeds back the output to the sending end, and then controls the end of the wireless charging process through the sending end. [0004] Due to the errors in the production parameters and material parameters of the terminal equipment, in the process of wireless chargin...

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Problems solved by technology

[0005] Based on this, an object of the present disclosure is to provide a wireless charging receiving device, which is used to solve the problem in the prior art that the efficiency of wireless charging is reduced due to the large error between the resonant frequency of the receiving end and the resonant frequency of the transmitting end.

[0006] In addition, another object of the present disclosure is to provide a wireless charging system and its charging control method, which is used to solve the problem in the prior art that the efficiency of wireless charging is reduced due to the large error between the resonant frequency of the receiving end and the resonant frequency of the transmitting end.

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