Electric vehicle storage battery wireless charging system and control method thereof

Abstract

The invention discloses an electric vehicle storage battery wireless charging system and a control method thereof. The system comprises a rectifying module, a high-frequency inversion module, an LCL type primary side trigger mechanism, a secondary side pickup mechanism, a secondary side rectifying module, a DC / DC module, a storage battery, a battery parameter detecting module, a battery management control module, a PWM control module, a PWM algorithm unit, a vehicle-mounted radio frequency emission unit, a primary side radio frequency receiving unit and a high-frequency inversion control module. The system is characterized in that the LCL type primary side trigger mechanism enables the current amplitude of a primary side coil to be kept constant under certain working frequency of a high-frequency inverter, so that the induced voltage of a secondary side circuit is independently decoupled with the parameters of a primary side circuit, and independent control over of the secondary side circuit is facilitated; meanwhile, under the action of the PWM control module, the DC / DC module enables the storage battery to work in the trickle charge mode, or the constant-voltage charge mode or the constant-current charge mode according to the parameter state of the storage battery.

Description

technical field [0001] The invention relates to a wireless power transmission power supply device and a control method, belonging to the field of wireless power transmission, in particular to a wireless charging system for an electric vehicle storage battery and a control method thereof. Background technique [0002] Inductively Coupled Power Transfer (ICPT) technology uses the coupling of space magnetic field to realize the non-contact transmission of short-distance power. In the ICPT system, the energy can be flexibly supplied to one or more stationary or moving devices through the electromagnetic field, and at the same time, due to its mechanism characteristics, the transmission of electric energy does not pass through the wires, avoiding the hidden dangers that may be caused by contact, such as Sparks, poor contact, etc., can also make joints, connectors, etc. free from maintenance, and are not affected by external factors such as weather. Therefore, in addition to flex...

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Problems solved by technology

[0005] The present invention mainly aims at the inflexibility of the charging method and the risk of personal electric shock caused by the traditional wired charging method of electric vehicles, and proposes a wireless charging method for electric vehicle batteries and a control method thereof. Under certain parameter conditions, the open-circuit voltage amplitude induced by the secondary pick-up coil can be kept constant, and the decoupling of the primary and secondary main circuits can be realized; in addition, in order to improve the performance and life of the battery pack, the present invention can be based on The parameters of the battery pack make the battery pack automatically switch to the corresponding charging mode

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