Portable mobile phone wireless charger with overheat protection device

Abstract

The invention discloses a portable mobile phone wireless charger with an overheat protection device, belongs to the field of mobile phone wireless chargers. According to the portable mobile phone wireless charger with the overheat protection device, when the temperature of a charging module is too high, an energy supply circuit of the charging module is cut off, and power supply work is stopped, which is the first protection of the scheme; when the first protection cannot play a role, the control terminal cuts off the energy supply circuit of the electromagnet and ejects the mobile phone mainbody out of the wireless charger main body under the action of the compression spring in a compressed state, which is the second protection of the scheme; when both the first protection and the secondprotection cannot play a role normally, the overheating protection pile which expands when heated acts on the placing frame to eject out the mobile phone main body and disconnect wireless charging, which is the third protection of the scheme, the charging safety of the wireless charger is improved through the three protections, and battery safety accidents are not easy to induce.

Description

technical field [0001] The invention relates to the field of mobile phone wireless chargers, and more specifically relates to a portable mobile phone wireless charger with an overheat protection device. Background technique [0002] With the continuous improvement of requirements for power supply quality, safety, reliability, convenience, immediacy, special occasions, and special geographical environments for electrical equipment, the contact power transmission method is increasingly unable to meet actual needs. Wireless chargers It 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 out an electromagnetic signal to the outside under the action of electricity, and the coil at the receiving end receives the electromagnetic signal and converts it to the outside world. The electromagnetic signal is converted into el...

AI Technical Summary

Problems solved by technology

[0004] Since Samsung's battery explosion door has attracted attention in the society, people have gradually paid more attention to the safety of mobile phone batteries. Due to the working principle of the battery itself, the battery will overheat during the charging process. With the increase of battery heat Accumulation, easy to induce battery spontaneous combustion and explosion accidents. For wireless chargers, battery overheating during battery charging is still the main danger to battery safety. Although at this stage, technicians can use float charging technology and sensor and control circuit technology It can effectively disconnect the charging circuit in time and stop charging when the battery is overheated, but there are still many accidents about the spontaneous combustion of the battery during the charging process.

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