Intelligent buck-boost charging/discharging circuit and charging/discharging method thereof

Abstract

An intelligent buck-boost charging / discharging circuit provided by the present invention comprises a battery module, a power inductor, a charging / discharging control port, a free input / output port and a control unit, the free input / output port is equipped with a current detection circuit, and a first voltage detection circuit is connected between the charging / discharging control port and the free input / output port. A second voltage detection circuit is connected between the anode and the cathode of the battery module, and the control unit controls the on-off of the first, second, third and fourth switches according to the information transmitted by the first voltage detection circuit, the second voltage detection circuit and the current detection circuit. The beneficial effects of the present invention are that the circuit can realize the functions, such as the boost charging, the buck charging, the boost discharging, the buck discharging, the bypass, etc.; a portable power supply applying the circuit can charge itself rapidly; various and different mobile terminals can be charged rapidly; the people are convenient to use.

Description

technical field [0001] The invention relates to the field of control circuits, in particular to an intelligent buck-boost charging and discharging circuit and a charging and discharging method thereof. Background technique [0002] With the advancement of science and technology and society, more and more mobile terminals such as portable notebook computers, tablet computers, and smart phones have been popularized in people's lives. However, the limited size of the mobile terminal makes its own battery capacity limited, especially for mobile phones, which will bring a lot of inconvenience to people's work and life if they cannot be charged during business trips or trips. Therefore, portable power supplies Born to operate. The input and output voltage of ordinary portable power supply is 5V, the charging and discharging power is relatively small, the charging speed is slow, and the discharging voltage is fixed and cannot be changed according to the needs of the equipment. On...

AI Technical Summary

Problems solved by technology

However, the limited size of the mobile terminal makes its own battery capacity limited, especially for mobile phones, which will bring a lot of inconvenience to people's work and life if they cannot be charged during business trips or trips. Therefore, portable power supplies Born to operate

The input and output voltage of ordinary portable power supply is 5V, the charging and discharging power is relatively small, the charging speed is slow, and the discharging voltage is fixed and cannot be changed according to the needs of the equipment.

Once you encounter a device that requires a higher power supply, such as a notebook, a tablet, etc., ordinary portable power supplies cannot charge it

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