Design of Bidirectional Fast Charging Movable Power Source

To solve the problem of mobile phone life, this article designed a bidirectional fast charging movable power source. The design includes a microcontroller control circuit, charge management module, QC2.0 fast charge protocol identification module and battery protection module. After testing, when the power is connected, the circuit can charge by 9V input voltage. When the load is accessed, the QC2.0 fast charge protocol can be identified to achieve fast charging. Experimental results show that this circuit can effectively improve the charging power and shorten the charging time.