Device and method for overheat protection of charger by using on-resistor of MOS (Metal Oxide Semiconductor) tube

Abstract

The invention relates to the technical field of chargers, in particular to a device and method for overheat protection of a charger by using on-resistor of an MOS (Metal Oxide Semiconductor) tube. A rotating mechanism is arranged on the inner side wall of a wireless charger, an abutting plate is arranged at the output end of the rotating mechanism, the abutting plate abuts against the end, away from the jacking spring, of the containing frame, the temperature of the wireless charger body is monitored in real time through the temperature sensor, temperature data is transmitted into the main control panel, when the main control board judges that the temperature of the wireless charger body rises abnormally, the main control board is used for controlling the rotating mechanism to start so as to drive the abutting plate to rotate, so that the abutting plate is separated from the placing frame, the jacking spring is in a compressed state in a normal state, when the abutting plate is separated from the placing frame, the self restoring force of the jacking spring is used for driving the placing frame to rotate, and a mobile phone in the placing frame is separated from the coil, so that power supply is stopped.

Description

technical field [0001] The invention relates to the technical field of chargers, in particular to an overheat protection device and method using MOS tube on-resistance as a charger. Background technique [0002] The wireless charger is a device that uses the principle of electromagnetic induction for charging. Its principle is similar to that of a transformer. By placing a coil at the sending and receiving ends, the coil at the sending end sends an electromagnetic signal to the outside under the action of electricity, and the coil at the receiving end receives the electromagnetic signal. Signal and convert the electromagnetic signal into current, and control the output current through the on-resistance of the MOS tube, so as to achieve the purpose of wireless charging. [0003] However, when the wireless charger is charging the mobile phone, the battery will overheat. With the accumulation of battery heat, it is easy to induce battery spontaneous combustion and explosion acc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an overheat protection device and method using MOS transistor conduction resistance as a charger, so as to solve the problem of battery overheating in the wireless charger in the prior art during the charging process of the mobile phone. The accumulation of battery heat can easily induce battery spontaneous combustion and explosion accidents

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