CN100435449C - Charging set capable of adjusting charging current, and adjusting method - Google Patents
Charging set capable of adjusting charging current, and adjusting method Download PDFInfo
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- CN100435449C CN100435449C CNB2004100517936A CN200410051793A CN100435449C CN 100435449 C CN100435449 C CN 100435449C CN B2004100517936 A CNB2004100517936 A CN B2004100517936A CN 200410051793 A CN200410051793 A CN 200410051793A CN 100435449 C CN100435449 C CN 100435449C
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- 238000007600 charging Methods 0.000 title claims description 167
- 238000000034 method Methods 0.000 title claims description 13
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 abstract 1
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- 101100096893 Mus musculus Sult2a1 gene Proteins 0.000 description 2
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Abstract
The present invention relates to a charge device capable of regulating charge current, which is suitable for automatically regulating the size of the charge current for backup batteries. The present invention comprises a charge integrated circuit and a charge current control module, wherein the charge integrated circuit is provided with a charge current set end, and is used for setting the size of the charge current for backup batteries according to the resistance of the charge current set end; the charge current control module is coupled with the charge current set end, and is used for controlling the resistance to regulate the size of the charge current of the charge integrated circuit on the backup batteries according to signals sent by mobile devices during the charge.
Description
[Ji Intraoperative field]
The invention relates to a kind of charging device and method of adjustment thereof, and particularly relevant for a kind of charging device and method of adjustment thereof of adjusting charging current.
[Bei Jing Ji Intraoperative]
Mobile device has changed most of people's lifestyle in the world, in today, each family almost has a mobile device at least, for example personal digital assistant (Personal Digital Assistant, PDA), mobile computer or mobile phone etc.The most basic outfit of mobile device has comprised power supply, and the power supply of mobile device is not outer to be exactly battery.When usually manufacturer sells consumer's mobile device, generally all can be equipped with two batteries, one is to be installed in main battery on the mobile device behind the full charging to make it can normal running.The reserve battery of standby replacement is used as in charging on another charging device that then is placed on mobile device and is equipped with.When the main battery power supply on being installed in mobile device exhausts, reserve battery on charging device can be changed at once so that mobile device can continue to use.
Fig. 1 is the calcspar of charging device and battery, please refer to Fig. 1.Usually charging device 11 can be simultaneously to two battery charge, and one is reserve battery 17, and another then is mounted in the main battery 15 on the mobile device 13.Charging device 11 is to connect 21 pairs of two battery charge of external power source by transformer 19, but transformer 19 has its certain load current value.When if main battery 15 and reserve battery 17 need to charge simultaneously, then need the transformer of big load current value.
[summary of the invention]
The object of the present invention is to provide a kind of charging device and method of adjustment thereof of adjusting charging current.Main battery and the reserve battery simultaneously need charge time of charging device of the present invention on being installed on mobile device can reduce the charging current to reserve battery, so that mobile device can the normal boot-strap running and need not use the bigger transformer of rated current.
For reaching above purpose, the invention provides a kind of charging device of adjusting charging current, be applicable to the charging current size of automatic adjustment to reserve battery, this charging device comprises charging integrated circuit and charging current control module.Wherein, the charging integrated circuit has charging current and sets end, in order to set the size to the charging current of reserve battery according to the resistance value of its connection.The charging current control module then is coupled to charging current and sets end, and signal is controlled its resistance value in the charging of sending in order to the foundation mobile device, and adjusts the size of charging integrated circuit to the charging current of reserve battery.
In a preferred embodiment of the present invention, wherein the charging current control module comprises first resistance, second resistance and switching circuit.First end of first resistance is coupled to charging current and sets then ground connection of its second end of end.First end of second resistance is coupled to the current settings end, and its second end then is coupled to first end of switching circuit.Switching circuit has three end points, and except first end coupled second resistance, its second end then was a ground connection, and control end is in order to signal in the charging that receives mobile device.
In a preferred embodiment of the present invention, wherein switching circuit comprises switching transistor and promotes resistance.Switching transistor has gate terminal and two source/drain electrode ends, signal in the charging of gate terminal reception mobile device, and wherein one source/drain electrode end is coupled to second end of second resistance, and another source/drain electrode end is ground connection then.The lifting resistance wherein gate terminal other end of end connection switching transistor then couples DC power supply.
Another purpose of the present invention then provides a kind of charging current method of adjustment, is applicable to the charging device that can adjust charging current.Wherein this charging device has the charging integrated circuit, and in order to reserve battery charging, and this charging device also has the charging current control module, in order to receive signal in the charging that mobile device sends.This charging current method of adjustment comprises the following steps: at first to judge whether mobile device is connected in charging device and is charging, if mobile device is connected in charging device when charging, then reduces the charging current to reserve battery.
As above-mentioned step, the method that its charging device reduces the charging current of reserve battery comprises: at first, mobile device can be sent in the charging signal to the charging current control module, and the charging current control module is according to its resistance value of signal change in the charging of mobile device, and the integrated circuit that charges at last reduces size to the reserve battery charging current according to the resistance value of current control module.
From the above, the present invention sets on the end in the charging current of charging integrated circuit, has coupled the charging current control module.When mobile device is connected to the charging current control module and charges, can change its resistance value, the charging integrated circuit reduces the charging current size of reserve battery then according to the resistance change of charging current control module.So, charging device of the present invention can use the rated current smaller transformer, and can be so that cost reduces.
[description of drawings]
Fig. 1 is the calcspar of charging device and battery.
Fig. 2 is the charging device circuit diagram of the charging current adjusted of a preferred embodiment of the present invention.
Fig. 3 is the charging current method of adjustment of a preferred embodiment of the present invention.
[embodiment]
Fig. 2 please refer to Fig. 2 for the charging device circuit diagram of the charging current adjusted of a preferred embodiment of the present invention.The charging device 11 of adjusting charging current of the present invention comprises and for example is the charging integrated circuit 23 of BQ24010 and charging current control module 20.Charging integrated circuit 23 has charging current and sets end ISET, couples charging current control module 20.Signal is controlled its resistance value in the charging that charging current control module 20 is sent according to for example mobile device 13 of PDA, and charging integrated circuit 23 is then according to the resistance value adjustment of charging current control module 20 size to the charging current of reserve battery 17.Though present embodiment uses the charging integrated circuit 23 of BQ24010 to describe, and non-limiting the present invention definitely will adopt this charging integrated circuit.
Please continue with reference to Fig. 2, above-mentioned charging current control module 20 comprises first resistance 29, second resistance 27 and switching circuit 30.First end 29a of first resistance 29 and the first end 27a of second resistance 27, be coupled to the charging integrated circuit 23 current settings end ISET.And the second end 29b ground connection of first resistance 29.Switching circuit 30 comprises switching transistor 31 and promotes resistance 33.Wherein, one source of switching transistor 31/drain electrode end 31a is coupled to second resistance, and another source/drain electrode end 31b is ground connection then.And signal in the charging that the gate terminal 31c of switching transistor 31 reception mobile device 13 is sent, simultaneously, its gate terminal 31c is coupled to and promotes resistance 33.The first end 33c that promotes resistance 33 then is coupled to DC power supply DC.
Please continue with reference to Fig. 2, the dc power supply terminal Vcc of charging integrated circuit 23 is coupled to DC power supply DC, and its earth terminal GND is ground connection then.The first end 29a of first resistance 29 connects output OUT and the reserve battery 17 of electric capacity 35 to charging integrated circuit 23.Mobile device 13 has charging integrated circuit 25, and its first state end STA1 is coupled to the gate terminal 31c of switching transistor 31; Its earth terminal GND ground connection; Its output OUT then is coupled to main battery 15.
Fig. 3 is the charging current method of adjustment of a preferred embodiment of the present invention, please refer to Fig. 3 and Fig. 2.When shown in step S310, during 17 chargings of 23 pairs of reserve batteries of charging integrated circuit, can shown in step S320, judge whether mobile device 13 connects charging device 11 and charge.When if mobile device 13 is coupled to charging device 11 desires to main battery 15 chargings, then shown in step S340,23 reductions of charging integrated circuit are to the charging current of reserve battery.The charging current formula of charging integrated circuit BQ24010 below is provided:
Wherein, I: the charging current of reserve battery
V
set＝2.5V
K
set＝335
R
Set: first resistance, second resistance in parallel
Please continue with reference to Fig. 2 and Fig. 3, not charge if mobile device 13 is connected to charging device 11, then be connected to DC power supply DC because promote resistance, when gate terminal received this DC power supply DC, switching transistor 31 can present short-circuit condition.At this moment, R
SetBe the resistance value 2K of first resistance, 29 second resistance 27 in parallel, so shown in step S330, the charging current of 23 pairs of reserve batteries 17 of charging integrated circuit is:
When mobile device 13 is connected to charging device 11 desires to 15 chargings of its main battery, can be shown in step S341, send in the charging signal to the gate terminal 31c of switching transistor 31 by the first state end STA1 of charging integrated circuit 25.Shown in step S342,, can make switching transistor 31 present open-circuit condition when the gate terminal 31c of switching transistor 31 receives in this charging during signal.At this moment, R
Set=the first resistance 29 value 5.6K, shown in step S343, the size that charging integrated circuit 23 can reduce according to the resistance value of charging current control module 20 charging current of reserve battery 17 is at last:
As known from the above, the charging device of adjusting charging current of the present invention and method of adjustment thereof are during simultaneously to reserve battery and main battery charging, because signal in the charging of reception mobile device makes the resistance value of charging current control module to make change according to signal in the charging.And the charging integrated circuit can be adjusted charging current to reserve battery according to the resistance change of charging current control module, and can use the lower transformer of rated current.
Claims (4)
1. the charging device that can adjust charging current is applicable to the charging current size of automatic adjustment to reserve battery, it is characterized in that this charging device that can adjust charging current comprises:
The charging integrated circuit, it has charging current and sets end, in order to set the resistance value of end and set size to the charging current of described reserve battery according to connecting described charging current;
The described charging device of adjusting charging current also comprises the charging current control module, couple described charging current and set end, signal in the charging of sending in order to the foundation mobile device is controlled described resistance value to adjust the size of described charging integrated circuit to the charging current of described reserve battery.
2. the charging device of adjusting charging current according to claim 1 is characterized in that: described charging current control module comprises:
First resistance has first end and second end, and described first end of described first resistance is coupled to described charging current and sets end, and described second end of described first resistance is ground connection then;
Second resistance has first end and second end, and described first end of described second resistance is coupled to described charging current and sets end; And
Switching circuit has first end, second end and control end, and described first end of described switching circuit couples described second end of described second resistance, the described second end ground connection of described switching circuit, and described control end is in order to receive signal in the described charging.
3. the charging device of adjusting charging current according to claim 2 is characterized in that: described switching circuit comprises:
Switching transistor has gate terminal, source terminal and drain electrode end, and described gate terminal receives signal in the described charging, and this source terminal is coupled to described second end of described second resistance, and this drain electrode end is ground connection then; And
Promote resistance, wherein an end connects described gate terminal, and the other end then couples DC power supply.
4. charging current method of adjustment, be applicable to the charging device that to adjust charging current, described charging device has the charging integrated circuit, in order to reserve battery is charged, and described charging device also has the charging current control module, in order to receive signal in the charging that mobile device sends, described charging current method of adjustment has the following step:
Judge whether described mobile device is connected in described charging device and charges; And
When described mobile device is connected in described charging device when charging, described mobile device is sent in the described charging signal to described charging current control module;
Described charging current control module is according to signal change resistance value in the described charging; And
The resistance change adjustment of the described charging current control module of described charging integrated circuit foundation is to the size of the charging current of described reserve battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100517936A CN100435449C (en) | 2004-10-11 | 2004-10-11 | Charging set capable of adjusting charging current, and adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100517936A CN100435449C (en) | 2004-10-11 | 2004-10-11 | Charging set capable of adjusting charging current, and adjusting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1761123A CN1761123A (en) | 2006-04-19 |
| CN100435449C true CN100435449C (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100517936A Expired - Fee Related CN100435449C (en) | 2004-10-11 | 2004-10-11 | Charging set capable of adjusting charging current, and adjusting method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI394344B (en) | 2009-07-07 | 2013-04-21 | Wistron Corp | Portable computer system and related power supply device and charging method |
| CN101957647B (en) * | 2009-07-15 | 2012-11-14 | 纬创资通股份有限公司 | Portable computer system and related power supply device and charging method |
| CN109450009B (en) * | 2018-10-10 | 2021-05-25 | Oppo广东移动通信有限公司 | Charging control method and device and computer storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0549187A (en) * | 1991-08-06 | 1993-02-26 | Hitachi Ltd | Dual power supply generator |
| US5764032A (en) * | 1997-03-06 | 1998-06-09 | Maxim Integrated Products, Inc. | Multiple battery switchover circuits |
| US6150796A (en) * | 1999-10-22 | 2000-11-21 | Motorola, Inc. | Low current vehicular adapter charger |
| US6242888B1 (en) * | 2000-05-30 | 2001-06-05 | Nokia Mobile Phones | Optimization of mobile station battery charging with a two slot charger by sharing a charging period |
-
2004
- 2004-10-11 CN CNB2004100517936A patent/CN100435449C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0549187A (en) * | 1991-08-06 | 1993-02-26 | Hitachi Ltd | Dual power supply generator |
| US5764032A (en) * | 1997-03-06 | 1998-06-09 | Maxim Integrated Products, Inc. | Multiple battery switchover circuits |
| US6150796A (en) * | 1999-10-22 | 2000-11-21 | Motorola, Inc. | Low current vehicular adapter charger |
| US6242888B1 (en) * | 2000-05-30 | 2001-06-05 | Nokia Mobile Phones | Optimization of mobile station battery charging with a two slot charger by sharing a charging period |
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|---|---|
| CN1761123A (en) | 2006-04-19 |
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Granted publication date: 20081119 Termination date: 20161011 |