MOBILE TERMINAL, DC-CHARGING POWER SOURCE ADAPTOR, AND CHARGING METHOD

摘要

This disclosure provides a mobile terminal, a DC-charging power source adaptor, and a charging method, where firstly the DC-charging power source adaptor is configured to communicate with the mobile terminal in a UART communication mode, and then a strategy to identity the type of charging is designed in the mobile terminal dependent upon configuration of communication pins of a different charging device, so that the mobile terminal identifies automatically the type of the external device. Also a specialized rapid charging mode is designed for the DC-charging power source adaptor, the battery of the mobile terminal being charged is DC-charged at large current by charging voltage output by the DC-charging power source adaptor, and the volt value of the charging voltage is adjusted dynamically according to the varying voltage of the battery.

主权项

1. A mobile terminal, comprising:
a battery configured to store electric energy; a USB interface configured to have an external device inserted there into; and a microprocessor configured to judge whether two differential data pins of the USB interface are shorted, upon detecting an external device being inserted into the USB interface; if the two differential data pins of the USB interface are not shorted, to conduct USB communication with the inserted external device; if the USB communication fails, to conduct UART communication with the inserted external device; if the UART communication succeeds, to determine the inserted external device as a DC-charging power source adaptor; and to detect voltage of the battery, and if the voltage of the battery is in a range delimited by preset DC-charging thresholds, to control charging voltage output by the DC-charging power source adaptor to DC-charge the battery, and to determine a charging voltage value of the DC-charging power source adaptor according to the current voltage of the battery.