Low-interference vehicle-mounted wireless charger

Abstract

The present invention relates to a low-interference vehicle-mounted wireless charger. The low-interference vehicle-mounted wireless charger comprises a circuit board, a wireless charging circuit arranged on the circuit board, and a shielding line arranged on the circuit board; the shielding line includes a peripheral copper foil line located at the outer periphery of the circuit board, and horizontal copper foil lines extending inwardly from the left side and right side of the peripheral copper foil line; each horizontal copper foil line is a line of which one end is connected with the peripheral copper foil line and of which the other end is disconnected from the peripheral copper foil line; and the horizontal copper foil lines which extend inwardly from the left side of the peripheral copper foil line and the horizontal copper foil lines which extend inwardly from the right side of the peripheral copper foil line are distributed in a staggered manner. According to the low-interference vehicle-mounted wireless charger of the invention, electromagnetic interference radiated from a charging coil can be decreased under a condition that normal charging is not affected, a good effect can be achieved in improving the EMC of a charging device, the radiation of a power source can be effectively reduced, the wave radiation of a whole power source battery can be decreased, an anti-interference capacity can be enhanced, outwards-radiated electromagnetic waves of the whole circuit board can be decreased, interference on other components can be prevented, and therefore, the reliability and stability of the entire wireless charger can be improved.

Description

technical field [0001] The invention relates to an improvement technology of a vehicle wireless charger. Background technique [0002] With the maturity of wireless charging technology, the scope of application is becoming more and more extensive. In the past few years, it was mainly for civilian use (such as mobile phone back clips and smart home), but since last year (2015), domestic car manufacturers have successively introduced wireless charging technology. Charging products are standard or optional. When wireless charging products really enter the field of auto accessories, EMC (ElectroMagnetic Compatibility) issues are particularly important. [0003] The interference of wireless chargers on electronic devices and circuits in automobiles is usually electromagnetic wave signals emitted by circuits on circuit boards and charging coils in wireless chargers, such as DC-DC power modules and MOS drive modules installed on circuit boards. There are components that emit elect...

AI Technical Summary

Problems solved by technology

[0004] In addition, due to the influence of the common mode signal of the power supply, the energy is radiated from the power supply part through the power line, and the battery wave is generated to interfere with the work of other electronic components

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