Distributed wireless charging method and system

Abstract

The invention provides a distributed wireless charging method and system. The system comprises a primary side device and a secondary side device. The secondary side device comprises a plurality of independent sub battery packs which are arranged at different positions of an electric vehicle in a distributed manner, and independent secondary side receiving coils and battery management systems whichare connected with the sub battery packs at different positions. The independent secondary side receiving coils are matched with primary side transmitting coils of the primary side device. The battery management systems are connected to a secondary side control unit. Charging control and equalization charging management of batteries are carried out through the primary / secondary side control unit.By using the system, balanced management and cooperative work of the vehicle-mounted sub battery packs can be realized, the electromagnetic radiation intensity in the charging process is reduced, andthe charging safety is improved.

Description

technical field [0001] The present invention relates to the electrical field, in particular to a distributed-based wireless charging method and system. Background technique [0002] Wireless charging technology relies on microwave, ultrasonic, laser, electromagnetic field, electromagnetic wave and other methods to realize the wireless transmission of electric energy, and there is no direct physical contact between the power supply and the charging load. Therefore, there is no need for artificial plugging and unplugging at the beginning and end of charging, which avoids the risk of electric shock and improves the safety, convenience and reliability of the charging process. And other bad weather and environment, also greatly reduce the maintenance cost. Wireless charging technology can be divided into two categories according to the energy transmission method. One is a coupled wireless charging technology that requires a pair of coupled transmitters and receivers to perform e...

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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