CN1140352A - Power circuit that can eliminate battery memory effect - Google Patents
Power circuit that can eliminate battery memory effect Download PDFInfo
- Publication number
- CN1140352A CN1140352A CN 95101523 CN95101523A CN1140352A CN 1140352 A CN1140352 A CN 1140352A CN 95101523 CN95101523 CN 95101523 CN 95101523 A CN95101523 A CN 95101523A CN 1140352 A CN1140352 A CN 1140352A
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- battery
- external power
- power source
- switch
- input
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- 230000003446 memory effect Effects 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a power supply circuit capable of eliminating memory effect of a battery, which comprises a direct current-to-direct current device, a battery voltage detection device, an external power supply detection device, a control device and a switch device, wherein the direct current-to-direct current device is connected with the battery voltage detection device; the direct current-to-direct current device is provided with a first input end, a second input end and an output end, the first input end is connected with the battery, and the second input end is connected with an alternating current-to-direct current device so as to be connected with an external power supply; the battery voltage detection device and the external power supply detection device are respectively used for detecting the voltages of the battery and the external power supply and are respectively connected with the switch device and the control device, and the control device is used for receiving signals of the computer temporary storage to control the switch device.
Description
The present invention is relevant for a kind of circuit 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 (NoteBookP.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 (ME MORY 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 (LowBettery 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/DCAdaptor), 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 charge again behind the battery light discharge.
In order to eliminate above-mentioned two shortcomings, power circuit of the present invention is not add resistance in addition and directly utilizes cell apparatus 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 memory effect of cell.
The power circuit that can eliminate memory effect of cell of the present invention comprises: a control device, a switching device and a battery, 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;
Described 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 battery, second input changes the DC power supply that flow directing device is changed in order to receive by external power source through described interchange, described DC-DC device is selectively corresponding to battery supply and external power source, producing a suitable direct current, and use for a load device via described output;
Described battery voltage detector in order to detecting the voltage of described battery, and produces a battery detecting signal;
Described external power source checkout gear in order to detecting described outer power voltage, and produces an external power source detection signal;
Described control device is selectively corresponding to described battery detecting signal and described external power source detection signal, to produce a switch controlling signal;
Described switching device, one first operator scheme is arranged for having optionally corresponding to described switch controlling signal, to control described battery 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, described external power source constitutes a charge circuit by described switching device and described cell apparatus, by external power source to described battery charge.
The described power circuit that can eliminate memory effect of cell, it is characterized in that, described switching device also has one second operator scheme for having optionally corresponding to described switch controlling signal, be connected to described DC-DC device with the control external power source via described second input, described switching device is controlled described battery and described extraneous isolated from power.The described power circuit that can eliminate memory effect of cell is characterized in that, it 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 one to deposit the computer software in the computer buffer in.
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 switching device comprises:
One first switch is in order to control the disconnecting of described cell apparatus and described first input end; Be connected between described first input end and the described battery;
One second switch is in order to control the disconnecting of described external power source and described first input end; Be connected between described second input and the described external power source;
One the 3rd switch in order to control the disconnecting of described cell apparatus and described external power source, is connected between described battery and the described external power source.
The described power circuit that can eliminate memory effect of cell, it is characterized in that, when described switching device is operated under a pattern, described first switch is connected described battery and described first input end, described second switch disconnects described external power source and described second input, the 3rd switch disconnects described battery and external power source, when exhausting to this battery electric quantity is intimate, described first switch disconnects battery and first input end, described second switch is connected the external power source and second input, and the 3rd switch is connected described cell apparatus and external power source.
The described power circuit that can eliminate battery note note effect, it is characterized in that, described battery electric quantity is close to when exhausting, described first switch disconnects described battery 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 battery and external power source.
The method of elimination memory effect of cell of the present invention, this method and a load device, a battery power supply, an external power source device and switching device collocation are used, and its step comprises:
A, detect described cell voltage, to produce the battery detecting signal of an expression state of charge that battery is deposited;
B, corresponding to this battery detecting signal, to produce a switch controlling signal to described switching device;
C, corresponding to described switch controlling signal, to control described battery power supply is described load device power supply, when exhausting to the electric weight of battery power supply is intimate, beginning is switched described switching device, changing into by the external power source device is load device power supply, and is described battery power supply charging by the external power source device.
Effect of the present invention is as follows:
Because the present invention does not add discharge resistance in addition, therefore there is not 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.(control a switching device as the control logic unit 37 among Fig. 3, switching device comprises first switch 35, second switch 34 and the 3rd switch 33 to this circuit by its control device.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 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 battery, 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;
Described 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 battery, second input changes the DC power supply that flow directing device is changed in order to receive by external power source through described interchange, described DC-DC device connects battery supply and external power source selectively, producing a direct current, and use for a load device via described output;
Described battery voltage detector in order to detecting the voltage of described battery, and produces a battery detecting signal;
Described external power source checkout gear in order to detecting described outer power voltage, and produces an external power source detection signal;
Described control device is selectively corresponding to described battery detecting signal and described external power source detection signal, to produce a switch controlling signal;
Described switching device, one first operator scheme is arranged for having optionally corresponding to described switch controlling signal, to control described battery 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, described external power source constitutes a charge circuit by described switching device and described cell apparatus, by external power source to described battery charge.
3, the power circuit that can eliminate memory effect of cell according to claim 1, it is characterized in that, described switching device also has one second operator scheme for having optionally corresponding to described switch controlling signal, be connected to described DC-DC device with the control external power source via described second input, described switching device is controlled described battery and described extraneous isolated from power.
4, the power circuit that can eliminate memory effect of cell according to claim 3 is characterized in that, it 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 one to deposit the computer software in the computer buffer in.
6, 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.
7, 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.
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 is in order to control the disconnecting of described cell apparatus and described first input end; Be connected between described first input end and the described battery;
One second switch is in order to control the disconnecting of described external power source and described first input end; Be connected between described second input and the described external power source;
One the 3rd switch in order to control the disconnecting of described cell apparatus and described external power source, is connected between described battery and the described external power source.
9, the power circuit that can eliminate memory effect of cell according to claim 8, it is characterized in that, when described switching device is operated under a pattern, described first switch is connected described battery and described first input end, described second switch disconnects described external power source and described second input, the 3rd switch disconnects described battery and external power source, when exhausting to this battery electric quantity is intimate, described first switch disconnects battery and first input end, described second switch is connected the external power source and second input, and the 3rd switch is connected described 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, described battery electric quantity is close to when exhausting, described first switch disconnects described battery 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 battery and external power source.
11, a kind of method of eliminating memory effect of cell, this method and a load device, a battery power supply, an external power source device and switching device collocation are used, and its step comprises:
A, detect described cell voltage, to produce the battery detecting signal of an expression state of charge that battery is deposited;
B, corresponding to this battery detecting signal, to produce a switch controlling signal to described switching device;
C, corresponding to described switch controlling signal, to control described battery power supply is described load device power supply, when exhausting to the electric weight of battery power supply is intimate, beginning is switched described switching device, changing into by the external power source device is load device power supply, and is described battery power supply charging by the external power source device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95101523A CN1043938C (en) | 1995-02-17 | 1995-02-17 | Power supply circuit and method capable of eliminating battery memory effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95101523A CN1043938C (en) | 1995-02-17 | 1995-02-17 | Power supply circuit and method capable of eliminating battery memory effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1140352A true CN1140352A (en) | 1997-01-15 |
| CN1043938C 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 and method capable of eliminating battery memory effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043938C (en) |
Cited By (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 detection 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 |
| CN102934315A (en) * | 2010-01-07 | 2013-02-13 | 沃克斯国际有限公司 | Method and apparatus for harvesting energy |
| CN104583792A (en) * | 2012-09-05 | 2015-04-29 | 罗伯特·博世有限公司 | Low-voltage grid with DC voltage converter and method for testing low-voltage batteries |
Families Citing this family (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 supply unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04193033A (en) * | 1990-11-26 | 1992-07-13 | Hitachi Ltd | Battery 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 |
-
1995
- 1995-02-17 CN CN95101523A patent/CN1043938C/en not_active Expired - Lifetime
Cited By (6)
| 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 detection 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 |
| CN102934315A (en) * | 2010-01-07 | 2013-02-13 | 沃克斯国际有限公司 | Method and apparatus for harvesting energy |
| CN102934315B (en) * | 2010-01-07 | 2015-08-12 | 沃克斯国际有限公司 | Method and device for harvesting energy |
| CN104583792A (en) * | 2012-09-05 | 2015-04-29 | 罗伯特·博世有限公司 | Low-voltage grid with DC voltage converter and method for testing low-voltage batteries |
| US9983267B2 (en) | 2012-09-05 | 2018-05-29 | Robert Bosch Gmbh | Low-voltage network with a DC-DC converter and method for testing a low-voltage battery by employing pulses feed to the low-voltage battery to sense either voltage or current response |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043938C (en) | 1999-06-30 |
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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 | Publication of corrected invention patent application |
Correction item: Abstract figure Correct: CorrectionsIMAGE SRC=0.GIF False: Yuan Wu Number: 3 Page: 60 Volume: 13 |
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| 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. |
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| 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 |