Charging circuit and mobile terminal

A charging circuit and mobile terminal technology, applied in the field of electronics, can solve the problems of reducing battery cycle life, not suitable for mobile terminals, etc., and achieve the effects of ensuring battery cycle life, ensuring charging efficiency, and improving practicability

Active Publication Date: 2015-12-23
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a charging circuit and a mobile terminal to solve the problem in the prior art that using a normal charging current for a lithium battery in a low temperature environment will reduce the cycle life of the battery, and the current solution is not suitable for the mobile terminal.

Method used

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  • Charging circuit and mobile terminal

Examples

Experimental program
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Effect test

no. 1 example

[0027] See Figure 1-2 , which shows a structural diagram of the charging circuit provided by the first embodiment of the present invention, the charging circuit may include:

[0028] The detection module 101 is used to detect the temperature of the battery.

[0029] Here, the detection module 101 detects the temperature of the battery, which provides data support for the subsequent conversion of the charging mode according to the temperature of the battery.

[0030] The first charging module 102 is configured to charge the battery 104 with a first current when the temperature of the battery is greater than or equal to a preset value.

[0031] Here, when the temperature of the battery is greater than or equal to a preset value, the first charging module 102 uses the first current to charge the battery 104 to ensure the charging efficiency of the battery 104, wherein the preset value is required by normal charging Threshold value of battery temperature.

[0032] The second c...

no. 2 example

[0043] See image 3 , which shows a structural diagram of the charging circuit provided by the second embodiment of the present invention, the charging circuit may include:

[0044] The detection module 301 is used to detect the temperature of the battery.

[0045] Here, the detection module 301 detects the temperature of the battery, which provides data support for the subsequent conversion of the charging mode according to the temperature of the battery.

[0046] The first charging module 302 is configured to charge the battery 304 with a first current when the temperature of the battery is greater than or equal to a preset value. Specifically, the first charging module 302 includes a first integrated circuit 305 connected between the detection module 301 and the battery 304 . Preferably, the first integrated circuit 305 includes a first DC-to-DC charging integrated circuit 307 .

[0047] Here, since the first DC-DC charging integrated circuit 307 adopts the switch chargi...

no. 3 example

[0076] See Image 6 , which shows the structural diagram of the charging circuit provided by the third embodiment of the present invention, the charging circuit may include:

[0077] The detection module 601 is used to detect the temperature of the battery.

[0078] Here, the detection module 601 detects the temperature of the battery, which provides data support for the subsequent conversion of the charging mode according to the temperature of the battery.

[0079] The first charging module 602 is configured to charge the battery 604 with a first current when the temperature of the battery is greater than or equal to a preset value. Specifically, the first charging module 602 includes a third integrated circuit 605 connected between the detection module 601 and the battery 604 . Preferably, the third integrated circuit 605 includes a second DC-to-DC charging integrated circuit 607 .

[0080] Here, when the temperature of the battery is greater than or equal to a preset val...

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Abstract

The invention provides a charging circuit and a mobile terminal, relates to the electronic field, and solves problems that when a lithium battery is normally charged in a low-temperature environment, the circulation life of the battery can be reduced in the prior art, and an existing solving scheme is not suitable for the mobile terminal. The charging circuit comprises a detection module, a first charging module and a second charging module, wherein the detection module is used for detecting the temperature of the battery; the first charging module is used for charging the battery by using first current when the temperature of the battery is more than or equal to a preset value; the second charging module is used for charging the battery by using second current when the temperature of the battery is less than the preset value; the first current is less than the second current. The scheme disclosed by the invention can be used for effectively solving the problem that the lithium battery and the like can not be normally charged in the low-temperature environment, and the charging circuit can be used for ensuring the battery charging efficiency and the battery circulation life, and can be effectively suitable for portable mobile terminal application environments.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a charging circuit and a mobile terminal. Background technique [0002] Lithium-ion batteries have the advantages of high energy density and no memory effect, and are widely used in various fields. However, due to some characteristic limitations of lithium-ion batteries, users have stricter requirements when charging mobile terminals with lithium-ion batteries. Especially in a low temperature environment, the activity of lithium ions is very low. If the same charging current as at room temperature (such as 0.5C charging) is used, it is easy to deposit and form lithium metal on the negative electrode graphite, which reduces the cycle life of the battery and reduces the expansion rate. Increase. Therefore, in order to ensure the cycle life of the battery, it is necessary to reduce the charging current when charging in a low temperature environment, but reducing the charging current wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCY02B40/00
Inventor 丁志涛
Owner VIVO MOBILE COMM CO LTD
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