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Method and device for charging through universal serial bus (USB) interface

A universal serial bus and interface technology, applied in circuit devices, battery circuit devices, data exchange chargers, etc., can solve the problems of low charging efficiency and achieve the effect of improving charging efficiency

Inactive Publication Date: 2010-10-06
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for charging through a universal serial bus interface, which overcomes the problem of low charging efficiency through a USB interface in the prior art

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  • Method and device for charging through universal serial bus (USB) interface
  • Method and device for charging through universal serial bus (USB) interface
  • Method and device for charging through universal serial bus (USB) interface

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0023] figure 1 Shown is an overall flow chart of a method for charging through a USB interface provided by an embodiment of the present invention.

[0024] A method for charging through a USB interface provided in this embodiment is applied to devices charged through a USB interface, such as mobile phones and MP4s. In this embodiment, the method may include:

[0025] Step 100: Connect the device to be charged with the power supply device through a universal serial bus interface;

[0026] Step 101: closing the communication between the USB module and the power supply device;

[0027] Among them, the communication with the USB module can be closed by disconnecting the data cable, so that data communication can...

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PUM

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Abstract

The embodiment of the invention discloses a method and a device for charging through a universal serial bus (USB) interface. The method comprises the following steps of: connecting a device to be charged with a power supply device through the USB interface; closing communication between a USB module and the power supply device; and charging the device to be charged by the power supply device through a power line on the USB interface. In the technical scheme of the invention, the communication between the USB module and the power supply device is stopped and the device to be charged is charged through the USB interface. In the method, the communication work of the USB module is stopped, so the USB module does not need to be always under a working condition when the device is charged through the USB interface; and the CPU of the device to be charged can stop working to make all current used for charging so as to improve the charging efficiency.

Description

technical field [0001] The invention relates to the technical field of charging, in particular to a method and device for charging through a universal serial bus interface. Background technique [0002] A universal serial bus (USB, Universal Serial Bus) charging function refers to a function of charging a terminal through a USB port of a personal computer (PC, Personal Computer) or a notebook computer. There are usually two types of four-wire and five-wire on the USB hardware interface. In general, four wires are used, which are D+, D-, power and ground. According to the provisions of the USB protocol, the external output current provided by the USB port power cable is limited to 500mA, so the charging function of the terminal often needs to add a current limit to prevent the risk of burning the internal circuit of the PC or notebook by requesting a current exceeding the protocol. [0003] After the current mobile terminal and PC are connected through a USB cable, it is gen...

Claims

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Application Information

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IPC IPC(8): H01M10/44
CPCH02J7/0004H02J7/00036H02J7/00047
Inventor 陈磊
Owner HUAWEI DEVICE CO LTD
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