CN1043938C - Power supply circuit capable of eliminating memory effect of cell - Google Patents
Power supply circuit capable of eliminating memory effect of cell Download PDFInfo
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- CN1043938C CN1043938C CN95101523A CN95101523A CN1043938C CN 1043938 C CN1043938 C CN 1043938C CN 95101523 A CN95101523 A CN 95101523A CN 95101523 A CN95101523 A CN 95101523A CN 1043938 C CN1043938 C CN 1043938C
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- power source
- external power
- cell apparatus
- switch
- cell
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Abstract
The present invention relates to a power supply circuit capable of eliminating the memory effect of a cell, which comprises a direct current-direct current converter, a cell voltage detector, an outer power supply detector, a control device and a switch device, wherein the direct current-direct current converter is provided with a first input end, a second input end and an output end, the first input end is connected with the cell, and the second input end is connected with an alternate current-direct current converter so as to be connected with an outer power supply. The cell voltage detector and the outer power supply detector are respectively used for detecting the voltage of the cell and the outer power supply and are respectively connected with the switch device and the control device, and the control device is used for receiving a signal of a computer temporary storage so as to control the switch device.
Description
The present invention is relevant for a kind of circuit and the method that can eliminate memory effect of cell, refer in particular to a kind of battery is fully discharged after the circuit of row charging again, and be a kind of circuit that can utilize the battery discharge electric weight that loaded work piece is provided.
NI-G (Nicad) and nickel metallic hydrogen rechargeable batteries such as (Ni-M-H) are the supply of electric power sources of present laptop (Note BookP.C.) and time laptop electric device work such as (Sub-NoteBook P.C.).Yet this class battery in use, as the battery of (referring generally to discharge voltage) or the words that battery pack is charged once again of will not discharging fully greater than one volt, then this battery (group) can store electrical energy capacity promptly can reduce, and making the power supply energy shortage of battery (group), this phenomenon is the memory effect (MEMORY EFFECT) of battery.As shown in Figure 1, Fig. 1 is the discharge curve of battery.The discharge curve of normal battery is shown in curve 12; And the battery of generation memory effect, its discharge voltage can descend ahead of time, sees curve 14, make the low-voltage warning signal (Low Bettery Warnning generally is used for reminding the user, with battery (group) charging) of battery (group), occur ahead of time, and make shorten the service time of battery (group).Yet, on general notebook computer, when being connected to external power source, promptly be connected to and exchange when changeing direct current adapter (AC/DC Adaptor), notebook computer can be with power supply source by original powered battery, be converted to by external power source, keeping the electric power of battery, but also therefore cause the memory effect of battery.
Solving the method for " memory effect " of above-mentioned battery, is to allow the battery (group) that produces memory effect charge after abundant discharge (each battery discharge voltage is less than 1 volt) again, can eliminate this memory effect.At present known circuit design as shown in Figure 2, be an additional resistance 28 in the charger (Bettery Charger) in battery (group), by controller 27 controls first switch 23 open circuits, second switch 25 closures, after battery (group) 26 is discharged by resistance 28 in advance, by controller 27 first switch, 23 closures, second switch 25 open circuits are charged so that make interchange change direct current 22 pairs of batteries of adapter (group) 26 again.But therefore design needs the dump power of a resistance 28 with consuming cells (group), for solving heat dissipation problem, this resistance 28 can only be added in the road of independently charging (External Bettery Charger), and can't be applied on the charger that notebook computer includes.
The shortcoming of above-mentioned design is:
(1) heat dissipation problem: using conductive discharge is a short-cut method, but the heat that resistance produced is too concentrated, must use large-scale fin or fan ability efficiently radiates heat, therefore this design can't be placed on the charger that notebook computer includes, and only it can be arranged in independently in the charger, when needing charging, battery must be taken off from notebook computer, again it be put back in the notebook computer for use after waiting to charge electricity.
(2) waste electric energy: the electric energy that is consumed during with conductive discharge can't utilize, the waste resource.
The object of the present invention is to provide a kind of battery power that makes full use of, can eliminate the power circuit of memory effect of cell.
Another object of the present invention is to provide a kind of method that can eliminate memory effect of cell, so that battery charges again after discharge.
In order to eliminate above-mentioned two shortcomings, power circuit of the present invention is not add resistance in addition and directly utilizes electrical installations such as notebook computer to be battery discharge.At interdischarge interval, notebook computer can utilize the electric weight operate as normal of battery, to eliminate the memory effect of battery.
The power circuit that can eliminate memory effect of cell of the present invention comprises: a control device, a switching device and a cell apparatus, it is characterized in that, and also comprise the flow directing device that always circulates, a battery voltage detector and an external power source checkout gear;
The DC-DC device is provided with a first input end, one second input and an output; First input end is in order to receive a power supply from cell apparatus, and second input is changed a next external power source in order to receive via an interchange commentaries on classics flow directing device; Described DC-DC device connects cell apparatus and external power source selectively, producing a direct current, and connects a load device via described output;
Described battery voltage detector connects cell apparatus, in order to the voltage of detection cell apparatus, and produces a battery detecting signal;
Described external power source checkout gear connects external power source, in order to the voltage of detection external power source, and produces an external power source detection signal;
Described control device corresponding to battery detecting signal and external power source detection signal, produces a switch controlling signal selectively;
Described switching device, be provided with one first operator scheme for having optionally corresponding to described switch controlling signal, to control described cell apparatus for be connected to described DC-DC device via described first input end, and when the electric weight of cell apparatus is reduced to certain value, promptly control described external power source and be connected to the DC-DC device via described second input.
The described power circuit that can eliminate memory effect of cell, it is characterized in that, when described external power source is connected to described DC-DC device via described second input, external power source constitutes a charge circuit by described switching device and described cell apparatus, by external power source cell apparatus is charged.
The described power circuit that can eliminate memory effect of cell, it is characterized in that, described switching device also is provided with one second operator scheme for having optionally corresponding to described switch controlling signal, be connected to described DC-DC device to control described external power source via described second input, described cell apparatus controlled by switching device and external power source is isolated.
The described power circuit that can eliminate memory effect of cell is characterized in that, also comprises in order to set a setting device of described switching device operator scheme.
The described power circuit that can eliminate battery note note effect is characterized in that described setting device is a manual bridle wire apparatus.
The described power circuit that can eliminate battery note note effect is characterized in that described load device is a portable computer.
The described power circuit that can eliminate battery note note effect is characterized in that, described setting device is one to deposit the computer software of described computer in.
The described power circuit that can eliminate battery note note effect is characterized in that described switching device comprises:
One first switch in order to control the disconnecting of described cell apparatus and described first input end, is connected between first input end and the cell apparatus;
One second switch in order to control the disconnecting of described external power source and described second input, is connected between second input and the external power source;
One the 3rd switch, the disconnecting in order to control cell apparatus and external power source is connected between cell apparatus and the external power source.
The described power circuit that can eliminate memory effect of cell is characterized in that, when described switching device was operated under a pattern, described first switch was connected described cell apparatus and described first input end; Described second switch disconnects described external power source and described second input; Described the 3rd switch disconnects cell apparatus and external power source, when exhausting to the electric weight of cell apparatus is intimate, first switch disconnects cell apparatus and first input end, and second switch is connected the external power source and second input, and the 3rd switch is connected cell apparatus and external power source.
The described power circuit that can eliminate battery note note effect, it is characterized in that, the electric weight of described cell apparatus is close to when exhausting, described first switch disconnects cell apparatus and described first input end, and described second switch is connected described external power source and described second input, and described the 3rd switch disconnects cell apparatus and external power source.
A kind of method that can eliminate memory effect of cell of the present invention is characterized in that, may further comprise the steps:
The voltage of a, the described cell apparatus of detection is to produce the battery detecting signal of an expression state of charge that cell apparatus is deposited;
B, corresponding to the battery detecting signal, to produce a switch controlling signal to described switching device;
C, corresponding to switch controlling signal, be the power supply of described load device with the control cell apparatus, be close to when exhausting to the electric weight of cell apparatus, converting switch device, changing into by described external power source is the load device power supply, and is the cell apparatus charging by external power source.
Effect of the present invention is as follows: because the present invention does not add discharge resistance in addition, therefore not at heat dissipation problem; Owing to before discharge, still utilize the electric energy of battery to keep electrical work, so can save energy again.Illustrate
For further specifying conception of the present invention, the following accompanying drawing of special cooperation shows and embodiment is described as follows:
Fig. 1 is the discharge curve of battery;
Fig. 2 is the circuit diagram in the past of power supply tank discharge;
Fig. 3 is a most preferred embodiment schematic diagram of the present invention.
Most preferred embodiment of the present invention is as shown in Figure 1: utilize a setting device, as the input and output buffer among Fig. 3 (I/O Register) 39, this input and output buffer 39 be one can by computer software (BIOS or application program) or by button settings its output situation device, the operator scheme of coming initialization circuit.This circuit is controlled a switching device by its control device (as the control logic unit 37 among Fig. 3), and switching device comprises first switch 35, second switch 34 and the 3rd switch 33.When after input and output buffer 39 is set this discharge earlier of execution, going the pattern of charging again, control logic unit 37 can be because the signal that input and output buffer 39 is sent, with first switch, 35 closures, simultaneously with second switch 34 and the 3rd switch 33 open circuits, make battery (group) 36 by being connected to this DC-DC transducer (DC/DC CONVERTOR) 38, by load (as the notebook computer among Fig. 3 300) is powered, to reach the purpose of discharge.By this, this notebook computer 300 still can work on.After this battery (group) 36 electric power fully consume, the battery supply checkout gear in this circuit (as the 31B among Fig. 3 can send react on this moment battery electric quantity signal to this control logic unit 37.At this moment, this control logic unit 37 is corresponding to this signal, be about to this first switch, 35 open circuits, simultaneously with these second switch 34 closures, so that power supply is switched to external power supply power supply: direct current adapter (AC/DC ADAPTOR) 32 is changeed in interchange as shown in Figure 3, simultaneously, also with the 3rd switch 33 closures, constitute a complete charge circuit so that exchange commentaries on classics direct current adapter 32, the 3rd switch 33 and this battery (group) 36, battery (group) 36 is charged by exchanging commentaries on classics direct current adapter 32 supply of current by this.So promptly can reach and make behind the battery discharge purpose of row charging again,, provide the user maximum convenience to eliminate battery (group) memory effect.The load that is connected among the present invention is not limited in notebook computer, also can be used for other electric devices as follows notebook computer, word processor, walkman etc.
Feature of the present invention describes in detail through the foregoing description and diagram, will be more clear and definite.But what need the example explanation is, this embodiment is only as preferred embodiment of the present invention, but not desire causes restriction to interest field.
Claims (11)
1, a kind of power circuit that can eliminate memory effect of cell comprises: a control device, a switching device and a cell apparatus, it is characterized in that, and also comprise the flow directing device that always circulates, a battery voltage detector and an external power source checkout gear;
The DC-DC device is provided with a first input end, one second input and an output; First input end is in order to receive a power supply from cell apparatus, and second input is changed a next external power source in order to receive via an interchange commentaries on classics flow directing device; Described DC-DC device connects cell apparatus and external power source selectively, producing a direct current, and connects a load device via described output;
Described battery voltage detector connects cell apparatus, in order to the voltage of detection cell apparatus, and produces a battery detecting signal;
Described external power source checkout gear connects external power source, in order to the voltage of detection external power source, and produces an external power source detection signal;
Described control device corresponding to battery detecting signal and external power source detection signal, produces a switch controlling signal selectively;
Described switching device, be provided with one first operator scheme for having optionally corresponding to described switch controlling signal, to control described cell apparatus for be connected to described DC-DC device via described first input end, and when the electric weight of cell apparatus is reduced to certain value, promptly control described external power source and be connected to the DC-DC device via described second input.
2, the power circuit that can eliminate memory effect of cell according to claim 1, it is characterized in that, when described external power source is connected to described DC-DC device via described second input, external power source constitutes a charge circuit by described switching device and described cell apparatus, by external power source cell apparatus is charged.
3, the power circuit that can eliminate memory effect of cell according to claim 1, it is characterized in that, described switching device also is provided with one second operator scheme for having optionally corresponding to described switch controlling signal, be connected to described DC-DC device to control described external power source via described second input, described cell apparatus controlled by switching device and external power source is isolated.
4, the power circuit that can eliminate memory effect of cell according to claim 3 is characterized in that, also comprises in order to set a setting device of described switching device operator scheme.
5, the power circuit that can eliminate battery note note effect according to claim 4 is characterized in that described setting device is a manual bridle wire apparatus.
6, the power circuit that can eliminate battery note note effect according to claim 1 is characterized in that described load device is a portable computer.
7, the power circuit that can eliminate battery note note effect according to claim 6 is characterized in that, described setting device is one to deposit the computer software of described computer in.
8, the power circuit that can eliminate battery note note effect according to claim 1 is characterized in that described switching device comprises:
One first switch in order to control the disconnecting of described cell apparatus and described first input end, is connected between first input end and the cell apparatus;
One second switch in order to control the disconnecting of described external power source and described second input, is connected between second input and the external power source;
One the 3rd switch, the disconnecting in order to control cell apparatus and external power source is connected between cell apparatus and the external power source.
9, the power circuit that can eliminate memory effect of cell according to claim 8 is characterized in that, when described switching device was operated under a pattern, described first switch was connected described cell apparatus and described first input end; Described second switch disconnects described external power source and described second input; Described the 3rd switch disconnects cell apparatus and external power source, when exhausting to the electric weight of cell apparatus is intimate, first switch disconnects cell apparatus and first input end, and second switch is connected the external power source and second input, and the 3rd switch is connected cell apparatus and external power source.
10, the power circuit that can eliminate battery note note effect according to claim 9, it is characterized in that, the electric weight of described cell apparatus is close to when exhausting, described first switch disconnects cell apparatus and described first input end, and described second switch is connected described external power source and described second input, and described the 3rd switch disconnects cell apparatus and external power source.
11, a kind of method that can eliminate memory effect of cell that is applicable to claim 1～10 circuit is characterized in that, may further comprise the steps:
The voltage of a, the described cell apparatus of detection is to produce the battery detecting signal of an expression state of charge that cell apparatus is deposited;
B, corresponding to the battery detecting signal, to produce a switch controlling signal to described switching device;
C, corresponding to switch controlling signal, be the power supply of described load device with the control cell apparatus, be close to when exhausting to the electric weight of cell apparatus, converting switch device, changing into by described external power source is the load device power supply, and is the cell apparatus charging by external power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95101523A CN1043938C (en) | 1995-02-17 | 1995-02-17 | Power supply circuit capable of eliminating memory effect of cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95101523A CN1043938C (en) | 1995-02-17 | 1995-02-17 | Power supply circuit capable of eliminating memory effect of cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1140352A CN1140352A (en) | 1997-01-15 |
| CN1043938C true CN1043938C (en) | 1999-06-30 |
Family
ID=5073954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95101523A Expired - Lifetime CN1043938C (en) | 1995-02-17 | 1995-02-17 | Power supply circuit capable of eliminating memory effect of cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043938C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332286C (en) * | 2003-11-24 | 2007-08-15 | 佛山市顺德区顺达电脑厂有限公司 | Electric power administration arrangement and method for portable computers with auxiliary power supply |
| CN100403621C (en) * | 2004-11-18 | 2008-07-16 | 广达电脑股份有限公司 | Power supplier |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370270C (en) * | 2003-06-24 | 2008-02-20 | 明基电通股份有限公司 | Voltage detecting method and related circuit |
| CN101471681A (en) * | 2007-12-28 | 2009-07-01 | 希姆通信息技术（上海）有限公司 | Wireless communication module and automatic switchover method of double power supply thereof |
| WO2011084891A1 (en) * | 2010-01-07 | 2011-07-14 | Audiovox Corporation | Method and apparatus for harvesting energy |
| DE102012215755A1 (en) * | 2012-09-05 | 2014-03-06 | Robert Bosch Gmbh | Low-voltage network with DC-DC converter and method for testing a low-voltage battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072538A (en) * | 1991-11-19 | 1993-05-26 | 南通科达应用技术有限公司 | Flat wave type uninterruptable power supply |
| US5243269A (en) * | 1990-11-26 | 1993-09-07 | Hitachi, Ltd. | Battery power supply system |
-
1995
- 1995-02-17 CN CN95101523A patent/CN1043938C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243269A (en) * | 1990-11-26 | 1993-09-07 | Hitachi, Ltd. | Battery power supply system |
| CN1072538A (en) * | 1991-11-19 | 1993-05-26 | 南通科达应用技术有限公司 | Flat wave type uninterruptable power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332286C (en) * | 2003-11-24 | 2007-08-15 | 佛山市顺德区顺达电脑厂有限公司 | Electric power administration arrangement and method for portable computers with auxiliary power supply |
| CN100403621C (en) * | 2004-11-18 | 2008-07-16 | 广达电脑股份有限公司 | Power supplier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1140352A (en) | 1997-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| CI01 | Correction of invention patent gazette |
Correction item: Abstract figure Correct: CorrectionsIMAGE SRC=0.GIF False: Yuan Wu Number: 3 Page: 60 Volume: 13 |
|
| ERR | Gazette correction |
Free format text: CORRECT: FIGURE OF ABSTRACT; FROM: YUAN WU TO: ARE CORRECT (FIGURE) |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WEICHUANG ZITONG CO., LTD. Effective date: 20020722 Owner name: HONHQI CO., LTD. Free format text: FORMER OWNER: ACER COMPUTER CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20020722 Address after: Taiwan County, Taipei, China Co-patentee after: Weichuang Zitong Co., Ltd. Patentee after: Acer Inc Address before: Taiwan, China Patentee before: Acer Computer Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150217 Granted publication date: 19990630 |