Wireless charging system applicable to battery load

Abstract

The invention discloses a wireless charging system applicable to a battery load. The wireless charging system mainly aims at a charging requirement for an energy storage battery load of an electric vehicle and the like. The system is formed by sequentially connecting a power module, a transmitting coil, a receiving coil, a load coil, a rectification and voltage-stabilization module and an energy storage battery, wherein the power module and the transmitting coil form an energy transmitting device of the system; the receiving coil, the load coil and the rectification and voltage-stabilization system form an energy receiving device; under the resonance working state of the system, battery access with different voltage levels and internal resistances is realized by changing the duty ratio of a switching tube in the rectification and voltage-stabilization module at a receiving end, optimum impedance matching during battery load access is realized, and optimal efficiency transmission is achieved. According to the wireless charging system, wireless energy transmission is realized by using a magnetic coupling resonance principle, electric energy can be efficiently and stably supplied to the energy storage battery, and the wireless charging system has a great application prospect.

Description

technical field [0001] The invention relates to an electric energy transmission device, in particular to a wireless energy charging system for charging energy storage batteries such as electric vehicles. Background technique [0002] At present, the number of electric vehicles is increasing day by day, how to charge the energy storage battery of electric vehicles has become the focus of the development of electric vehicles. Compared with traditional wired charging devices, electric vehicle wireless charging can better play the role of electric vehicle mobile energy storage and reduce the requirements for battery capacity. Wireless charging has become a new charging method for electric vehicle energy storage batteries, but the resonant wireless charging system has relatively high requirements on the characteristics of the load, and the characteristics of the battery load will vary greatly with the charging voltage. , so the efficiency of the system is not stable enough durin...

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Problems solved by technology

At present, there is still no effective control method for battery load access to the resonant system. At present, it can only rely on accurate battery modeling on the one hand. On the other hand, the design and operation of the system can only be aimed at specific batteries with known characteristics. Wireless charging systems not universal

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