Apparatus for charging tyre pressure sensor battery by electromagnetic resonance

Abstract

The invention relates to a device for charging a battery of a tire pressure sensor by electromagnetic resonance. The device comprises a transmitter and an energy receiver, wherein, the transmitter is arranged under a vehicle body; and the energy receiver is arranged in a wheel frame. A transmitting coil comprises transmitting power supply and a transmitting coil, wherein, the transmitting power supply is connected with a vehicle body electricity supply circuit to provide working voltage for the transmitting coil; the energy receiver is connected with a battery charger of the tire pressure sensor of each tire; the transmitter vibrates in frequency of 10MHz after the transmitter is electrified to form a strong nonradiative magnetic field at the circumference; the magnetic field leads the energy receiver to generate electromagnetic resonance; the coil of the energy receiver generates current which flows to an input end of the battery charger to charge the battery. The device of the invention has simple, compact and reasonable structure, can omit detachment and maintenance by adopting charging management of wireless charge coil, can be used for a long time and has the advantages of energy conservation and environmental protection; the efficiency of energy transfer is high, which is 1 million times higher than the efficiency of energy transfer of common off-resonance magnetic induction; and the device is harmless to human body.

Description

technical field [0001] The invention relates to a device for charging a battery of a tire pressure sensor by using electromagnetic resonance, in particular to a device for wirelessly charging a tire pressure monitoring system (TPMS). Background technique [0002] Automobile tire pressure monitoring system (abbreviated as tire pressure monitoring system) is mainly used for automatic monitoring of tire pressure in real time when the car is running, and alarms for tire leakage and low air pressure to ensure driving safety. life safety early warning system. [0003] The TPMS based on the pressure sensor uses the pressure sensor installed in each tire to directly measure the tire pressure, and displays and monitors the tire pressure. When the tire pressure is too low or there is leakage, the system will automatically alarm. Since it is inconvenient to install and disassemble in the tire, the life of the battery determines the life of the entire system. The present invention see...

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Problems solved by technology

[0010] The purpose of the present invention is to use wireless charging to charge the battery of the tire pressure sensor installed in the tire of the car to solve the problem of the battery life of the tire pressure sensor, and to provide a device for charging the battery of the tire pressure sensor by using electromagnetic resonance

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