Implementation method for fast large-current charging of intelligent terminal

Abstract

The invention discloses an implementation method for fast large-current charging of an intelligent terminal. The intelligent terminal capable of automatically recognizing USB device types according to USB interfaces is involved in the method. The intelligent terminal comprises at least four USB interfaces, the USB interfaces are connected with a USB power switch, the USB power switch is provided with a power short-circuit / overcurrent protection module, the USB power switch is connected with a power changeover chip, and the power changeover chip is connected with a power supply module. USB device types are distinguished by recognizing USB device interface types. According to the new implementation method for fast large-current charging of the intelligent terminal, the vehicle-mounted terminal supports four USB interfaces; the functions of data transmission and fast charging are achieved on the premise of increasing little cost and meeting the optimal function demand.

Description

technical field [0001] The invention relates to a USB port of a vehicle-mounted terminal, in particular to a method for realizing rapid and high-current charging of an intelligent terminal. Background technique [0002] Most of the existing vehicle-mounted terminal USB ports have a charging function and a data transmission function at the same time, and are used for playing audio and video files in the U disk for the user, and for charging mobile devices (mainly Android systems and industrial OS systems). In order to avoid mutual interference between the data transmission function and the charging function, the charging current of the USB port of the vehicle terminal is generally limited to less than 1A, which cannot meet the charging requirements of most mobile phones at 1.5A or even 2.1A at full load. Charging is very slow. In order to solve the above problems, automobile manufacturers generally add a special charging USB port on the vehicle, which is only used for chargi...

AI Technical Summary

Problems solved by technology

In order to avoid mutual interference between the data transmission function and the charging function, the charging current of the USB port of the car terminal is generally limited to less than 1A, which cannot meet the charging requirements of most mobile phones at 1.5A or even 2.1A at full load. Charging is very slow

In order to solve the above problems, car manufacturers generally add a special charging USB port on the vehicle, which is only used for charging mobile phones, but this method increases the cost by about 50 yuan

Furthermore, with more and more smart devices, the possibility of passengers' demand for charging is also increasing. Only one dedicated USB charging port is designed, and the number is seriously insufficient to meet the actual needs of users. Both the main driver's seat and the rear passengers need When using charging, the problem is highlighted

[0003] The charging current of the USB port of the car terminal is limited to less than 1A, which makes it impossible to meet the charging demand of most mobile phones with a full load of 1.5A or even 2.1A. The USB port of the car terminal charges the mobile phone very slowly.

Automobile manufacturers generally add a special charging USB port on the vehicle, only for charging mobile phones. This method increases the cost of materials by about 50 yuan; there is only one dedicated USB port, and the number of charging ports is insufficient to meet actual needs.

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