A distributed wireless charging method and system

Abstract

The present invention provides a distributed-based wireless charging method and system. The system includes a primary device and a secondary device, and the secondary device includes several independent and distributed sub-battery packs installed in different positions of the electric vehicle. , and independent secondary receiving coils and battery management systems connected to the sub-battery packs at different positions, each independent secondary receiving coil is matched with each primary transmitting coil of the primary device, and each battery management system The systems are all connected to the secondary side control unit; the charging control and the balanced charging management of the battery are performed through the primary / secondary side control unit. The system can realize the balanced management and cooperative work of each sub-battery pack in the vehicle, reduce the electromagnetic radiation intensity during the charging process, and improve the safety of charging.

Description

technical field [0001] The present invention relates to the electrical field, in particular to a distributed wireless charging method and system. Background technique [0002] Wireless charging technology relies on microwaves, ultrasonic waves, lasers, electromagnetic fields, electromagnetic waves, etc. to achieve wireless transmission of electrical energy, and there is no direct physical contact between the power supply and the charging load. Therefore, manual plugging and unplugging is not required at the beginning and end of charging, which avoids the danger of electric shock and improves the safety, convenience and reliability of the charging process. It also greatly reduces maintenance costs. Wireless charging technology can be divided into two categories according to the energy transmission method. One is the coupled wireless charging technology that requires a pair of coupled transmitters and receivers to transmit energy. The wireless charging methods that belong to ...

AI Technical Summary

Problems solved by technology

[0003] One of the difficulties in the popularization and use of the existing wireless electromagnetic induction wireless charging system for electric vehicles is that because the power supply wirelessly charges the load one-to-one as a whole, its energy transmission power is limited, and the existing fast charging technology can achieve a maximum of 1.6C (one hour will The constant current from full discharge to full charge of the battery is about 1C), but it is difficult to realize the charging demand of 5C or even 8C

At the same time, with the increase of power, the electromagnetic radiation problem of the electromagnetic induction wireless charging system will become more serious. The electromagnetic radiation with too high intensity will affect the safety of people around and other creatures, and it is difficult to meet the standard requirements of electromagnetic radiation.

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