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Battery voltage-multiplying charging circuit and mobile terminal

A charging circuit and mobile terminal technology, applied in battery circuit devices, electric vehicles, circuit devices, etc., can solve problems such as heating of the battery body, and achieve the effect of increasing the charging speed

Inactive Publication Date: 2016-09-28
LEMOBILE INFORMATION TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The embodiment of the present invention provides a battery voltage doubler charging circuit and a mobile terminal to solve the problem of heating of the battery body when charging with a large current in the existing fast battery charging scheme

Method used

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  • Battery voltage-multiplying charging circuit and mobile terminal
  • Battery voltage-multiplying charging circuit and mobile terminal
  • Battery voltage-multiplying charging circuit and mobile terminal

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0020] refer to image 3 , shows a schematic diagram of a battery voltage doubler charging circuit according to Embodiment 1 of the present invention.

[0021] The battery voltage doubler charging circuit in the embodiment of the present invention includes: a charging port 301, a high-voltage charging unit 302, a low-voltage charging unit 303, a battery pack 304, and a system 305, wherein the battery pack 304 includes a main battery 3041 and a secondary battery 3042 .

[0022] Wherein, the high-voltage charging unit 302 and the low-voltage charging unit 303 are respectively connected to the charging port 301 , the low-voltage charging unit 303 is connected to the system 305 and the battery pack 304 respectively; the high-voltage charging unit 302 is connected to the battery pack 304 .

[0023] When performing fast charging, the main battery 3041 and the auxiliary battery are switched to a series connection state, the charging voltage is transmitted to the high-voltage chargin...

Embodiment 2

[0031] refer to Figure 4 , shows a schematic diagram of a battery voltage doubler charging circuit according to Embodiment 2 of the present invention.

[0032] Such as Figure 4 As shown, the battery voltage doubler charging circuit provided by the embodiment of the present invention includes: a charging port (Charging port), a high-voltage charging unit (High voltage PMIC), a low-voltage charging unit, a battery pack, and a system, wherein the battery pack includes a main battery (Main battery) And a secondary battery, Sendbattery; the low-voltage charging unit is a normal charging unit Nomal PMIC, which provides regular mode charging for the battery pack.

[0033] Such as Figure 4 As shown, the high-voltage charging unit and the low-voltage charging unit in the battery voltage doubler charging circuit are respectively connected to the charging port, the low-voltage charging unit is connected to the system and the battery pack, and the high-voltage charging unit is also c...

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Abstract

The embodiment of the invention provides a battery voltage-multiplying charging circuit and a mobile terminal. The charging circuit comprises a charging port, a high-voltage charging unit, a low-voltage charging unit, a battery pack and a system. The battery pack includes a main battery and at least one extra battery; the high-voltage charging unit and the low-voltage charging unit are connected with the charging port, and the low-voltage charging unit is connected with the system and the battery pack; the high-voltage charging unit is connected with the battery pack; when quick charging is performed, the main battery and each extra battery are switched to be a series connection state, the charging voltage is transmitted to the high-voltage charging unit and the low-voltage charging unit through the charging port, the main battery and each extra battery are charged by the high-voltage charging unit, and the system is charged by the low-voltage charging unit; and when the charging is completed, the main battery and each extra battery are switched to be a parallel connection state and configured to charge the system. The battery voltage-multiplying charging circuit provided by the embodiment of the invention is able to avoid the problem that the battery body is heating and too high in temperature in the charging process.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a battery voltage doubler charging circuit and a mobile terminal. Background technique [0002] With the increase of mobile phone battery capacity, how to realize fast battery charging has become one of the current hot technologies. The industry generally uses xC (such as 0.7C, C, 1.5C, 2C, etc.) to define the charging speed of mobile phone batteries, where C is the capacity of the battery, and x is the charging rate. In the case of the same battery capacity, the greater the charging rate, the charging time shorter. However, the improvement of charging rate is more at the cost of lower energy density and higher charging temperature rise for mobile phone battery design. Whether it is an increase in battery capacity (such as changing from 2000mAh to 3000mAh) or an increase in charging rate, it will eventually put forward higher requirements on the flow capacity of the charging c...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/04H02J7/10
CPCH02J7/02
Inventor 孔繁博
Owner LEMOBILE INFORMATION TECH BEIJING
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