Base On PTC&NTC Power Bank Design And Implement

Suitable power bank, commonly known as charging treasure, electronic products, gas station, said. Because it can carry, in recent years, the love of the consumer’s hot. But the attendant security incidents, so that the mobile power to change "the charging bomb". As the core element of the power bank, the thermal stability of lithium ion material is an important factor for the safety of mobile power supply. "Lithium" is a very active chemical substance, in the case of abuse, such as high temperature, over charge, over discharge, over current or short circuit, the lack of safety design of lithium ion battery will have the possibility of thermal runaway, causing smoke, leakage, fire and even explosion and other safety incidents.On the current market, the suitable power bank supply design for a protection: over charge, over discharge, over current, short circuit. Therefore, it is very important to design a protection for the protection of over current, over temperature protection.This article is based on a protected basis, overtemperature and overcurrent study designed a suitable power bank with multiple protections. System critical hardware: lithium battery, lithium battery protection chip, the switching MOSFET, DC-DC boost chip, USB charging management chip, battery indicator management chip selection and the secondary protection components PTC(Positive Temperature Coefficient) & NTC(Negative Temperature Coefficient) the application, using Protel software to draw schematic of a suitable power bank, and produce physical, functional simulation post-assembled into individual machine systems, the final test by testing software and related equipment, to prove that the suitable power bank design with multiple protection features.