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Method and device for charged side detecting charging mode of exterior charging source

A charging method and charging power supply technology, applied in secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve problems such as inconvenient use for users, increase product cost, and slow response speed of logic circuits, etc., to increase costs and complexity, the effect of ensuring accuracy and reliability

Inactive Publication Date: 2008-05-07
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) Two connectors are generally required, one is a standard USB socket and the other is a charger socket, which increases the product cost and is inconvenient for users to use
However, because the logic circuit is used to detect the charging method, and the response speed of the logic circuit is slow, it cannot detect the high-speed USB interface.
Therefore, the scope of application of this scheme is small, and it is only used in low-speed USB, and cannot be applied to high-speed USB.

Method used

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  • Method and device for charged side detecting charging mode of exterior charging source
  • Method and device for charged side detecting charging mode of exterior charging source

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Embodiment Construction

[0025] figure 1 It is a structural block diagram of the device for detecting the charging mode of the present invention.

[0026] The device for detecting charging mode includes:

[0027] An external charging power supply 101, where the output detection signals D+ and D- are short-circuited, the external charging power supply is a charger, otherwise it is a USB device;

[0028] The signal line characteristic control module 102 that transmits the D+ signal on the charged side controls the pull-up, pull-down and floating characteristics of the signal line. ; The signal line characteristic control module 103 that transmits the D- signal at the charged side controls the pull-up, pull-down and floating characteristics of the signal line. The setting of the signal line characteristics can be realized by connecting pull-up resistors and pull-down resistors. Wherein, the pull-down resistor is greater than or equal to twice the pull-up resistor, and the pull-down and pull-up resisto...

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Abstract

The present invention relates to a method and a device for detecting an external rechargeable power supply and a charging mode by a charging side. The output of the rechargeable power supply includes two detection signals D+ and D-; when the access of the external rechargeable power supply is detected, the features of two signal lines for transferring the two detection signals D+ and D- should be set up, one is a pull-up feature and the other is a pull-down feature; then the real-time logic level of the two detection signals D+ and D- after being transferred through the two signal lines should be read out and whether the real-time logic level of the detection signal D+ is the same with that of the detection signal D- should be judged; if the same, the charging mode is a charger mode, otherwise, a USB power charging mode. The technical proposal provided by the present invention not only ensures the accuracy and the reliability of the detection results and is applicable to low-speed and high-speed USB types, but also has no effect on the realization of the maintainability and the performance of the charging side without increasing the cost and the complexity. .

Description

technical field [0001] The invention relates to a method and a device for detecting a charging mode, in particular to a method and a device for detecting a charging mode of an external charging power source at a charged side. Background technique [0002] USB is popularized rapidly with its novelty, convenience and universal features. At present, several commonly used methods of external charging power sources in chargers and USB device power supply compatible charging solutions are as follows: [0003] A. The external charging power supply supplies power to the charged side through two terminals, one terminal is connected to the charger, and the other terminal is connected to the USB device power supply. [0004] This method circuit is relatively simple, but has the following disadvantages: [0005] (1) The two connection types cannot be interchanged, that is, the terminal connected to the charger cannot be connected to the power supply of the USB device. Once connected i...

Claims

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Application Information

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IPC IPC(8): H01M10/44
CPCY02E60/12Y02E60/10
Inventor 李启瑞姜宁波左向民
Owner ZTE CORP
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