A portable mobile phone wireless charger with an overheating protection device

Abstract

The invention discloses a portable mobile phone wireless charger with an overheat protection device, which belongs to the field of mobile phone wireless chargers. A portable mobile phone wireless charger with an overheat protection device cuts off the power supply of the charging module when the temperature at the charging module is too high. This is the first protection of this scheme, and when the first protection fails to work, the control terminal cuts off the power supply circuit of the electromagnet, and under the action of the compression spring in the compressed state, The main body of the mobile phone will be ejected from the main body of the wireless charger. This is the second protection of this scheme. When the first protection and the second protection cannot function normally, the thermally expanded overheating protection pile will The function of placing the frame is to push out the main body of the mobile phone and disconnect the wireless charging. This is the third protection of this solution. Through the three protections, the safety of wireless charger charging is increased, and it is not easy to induce battery safety accidents.

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.

Images