Overcharging protection device and method for preventing mobile phone from overcharging

An overcharge protection, mobile phone technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as consumption, and achieve the effect of preventing overcharging

Inactive Publication Date: 2017-08-25
惠州市兴飞技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to make the protection circuit 4' effective, the traditional method is to use the detection unit 40' to be connected to the battery of the mobile phone 1' to measure its power level, even though the detection unit 40' generally consumes less power and accumulates power It can still consume a considerable amount of power

Method used

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  • Overcharging protection device and method for preventing mobile phone from overcharging
  • Overcharging protection device and method for preventing mobile phone from overcharging
  • Overcharging protection device and method for preventing mobile phone from overcharging

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Embodiment Construction

[0064] Please refer to image 3 , the present invention mainly adds an overcharge protection device 3 between the USB interface of a mobile phone 1 and the USB interface of a charging device 2, and automatically disconnects the charging device 2 and the mobile phone when it detects that the current becomes very small. 1, the battery pack 11 of the mobile phone 1 will be charged again unless a power transmission line 4 of the power supply is inserted again. Hereinafter, the specific implementation framework of the overcharge protection device 3 of the present invention will be described in detail.

[0065] Please refer to Figure 4 , is the circuit diagram of the overcharge protection device 3 of the preferred embodiment of the present invention. The overcharge protection device 3 includes a switch circuit 31 , a voltage detection unit 32 , a control unit 33 and a drive circuit 34 .

[0066] In a preferred embodiment of the present invention, the charging device 2 can be a t...

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Abstract

An overcharge protection device, coupled between a charging device and a battery pack of a mobile phone, includes a voltage detection unit, a control unit and a switch circuit composed of relays; the voltage detection unit senses the charging device and the battery The voltage between the groups, and output a corresponding current signal to the control unit, the control unit outputs a power on and off signal to the switch circuit according to the current signal, and then drives its relay to disconnect or conduct the battery pack of the charging device and the mobile phone , to achieve the overcurrent protection of the battery pack. The invention also provides a method for preventing the mobile phone from overcharging.

Description

technical field [0001] The invention relates to a protection device, in particular to an overcharge protection device used between a charging device and a battery pack. Background technique [0002] Please refer to figure 1 , which is the architecture diagram of charging a mobile phone. The mobile phone 1' is usually charged through a power transmission line (such as USBcable) 2' connected to a power supply 3'. The power supply 3' is usually a +5 volt output transformer or a USB port on a computer. +5 volt power supply, when the power supply of the mobile phone 1' is fully charged, the user needs to actively unplug the power transmission line 2' so that the power supply 3' stops charging the mobile phone 1'. [0003] However, when charging conventional rechargeable batteries (such as lithium batteries), the temperature of the battery core will often rise due to overcharging. In addition to shortening the battery life or premature damage, the battery core itself may also spo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/18
Inventor 卢光辉孔西领孙鹏
Owner 惠州市兴飞技术有限公司
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