CN1079176C - Charging-discharging device - Google Patents
Charging-discharging device Download PDFInfo
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- CN1079176C CN1079176C CN99102878A CN99102878A CN1079176C CN 1079176 C CN1079176 C CN 1079176C CN 99102878 A CN99102878 A CN 99102878A CN 99102878 A CN99102878 A CN 99102878A CN 1079176 C CN1079176 C CN 1079176C
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- switch
- battery pack
- comparator
- value
- power supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The present invention relates to a charge-discharge device which comprises a DC power supply device, a load first and a second switches, a switch switching control device and a charge retaining device, wherein load is connected with a battery group by the second switch. The power supply device is connected with the battery group by the first switch. The switch switching control device is respectively connected with the power supply device, the charge retaining device, the battery group, the first switch and the second switch. When the electric potential of the battery group is higher than designated value, the second switch is switched on. On the contrary, the first switch is switched on. When the electric potential of the battery group is below the designated value, a control signal is output by the charge retaining device so that the first switch maintains a switching on state. The device can prolong the service life of the battery group.
Description
The present invention relates to a kind of charge and discharge device, particularly a kind of select to battery pack directly charge or earlier battery pack is discharged after the charge and discharge device that charged again.
The general external charger of using on the market, the employed external charger of notebook computer for example, only can charge to battery pack, row charging again after can not effectively discharging to battery pack so will cause the battery pack service efficiency to reduce and reduce the life-span of its use.
The present employed battery of notebook computer, its inside all disposes integrated circuit (IC) device that detects battery capacity, the battery of emptying (as half-full state) charges again because the user habitually incites somebody to action not, except meeting influenced the life-span of battery, the meter (Gas-Gauge) that also can make inside battery measure electric weight lost its accuracy.
The objective of the invention is to propose a kind of charge and discharge device, the user can be according to user demand, charges after selection is directly charged to battery pack or elder generation discharges to battery pack again.So, the user just can be in time to the battery pack charging of discharging, with the accuracy that improves the inside battery checkout gear and the useful life of battery.
Take following measure for reaching described purpose the present invention:
A kind of charge and discharge device of the present invention comprises: a direct current power supply device and a load;
It is characterized in that, also comprise: one first switch, a second switch, a Switch Control device and a charging holding device;
Load is connected with a battery pack to be charged via second switch;
DC power supply connects battery pack via first switch, and the electric power that provides batteries charging required is provided;
The Switch Control device is connected with DC power supply, charging holding device, battery pack, first switch and second switch respectively;
When the current potential of battery pack is higher than a particular value, second switch conducting, otherwise first switch conduction; When the current potential of battery pack was lower than a particular value, under the control of Switch Control device, second switch was closed, first switch conduction, the charging holding device is then exported a control signal, in order to the control switch switching control, makes first switch keep conducting state always; When battery pack by device in when taking out, then control signal will be eliminated, and the Switch Control device recovers regular event.
Wherein, described Switch Control device can be a comparator circuit that compares in order to potential value and particular value to battery pack, when described potential value is lower than particular value, and described first switch conduction; Otherwise described second switch conducting.
Wherein, described comparator circuit can comprise: two comparators;
First comparator is in order to the potential value and the described particular value of more described battery pack;
Second comparator is in order to the output valve of the potential value and first comparator of more described battery pack;
When described potential value during less than the output valve of described first comparator, then described first switch conduction; Otherwise, described second switch conducting.
Wherein, described comparator circuit also can comprise: one the 3rd comparator, in order to the potential value of the output valve and the described battery pack of more described first comparator;
When the output valve of described the 3rd comparison means during greater than the potential value of described battery pack, the 3rd comparator is exported a signal and is made described first switch conduction; Otherwise the output signal of then described second comparator makes described second switch conducting.
Wherein, described charging holding device can comprise:
One voltage pull device, when the current potential of described battery pack was lower than described particular value, the voltage pull device was triggered, to export described control signal;
One reset apparatus, battery pack is by in the device when taking out, and reset apparatus is activated, and described control signal is eliminated, and makes described Switch Control device recover regular event.
Wherein, described DC power supply is a conversion equipment, is converted into direct voltage in order to receive external voltage.
Wherein, also can comprise an automatic charged activation device, it is connected with described Switch Control device, in order to selection described battery pack is directly charged and still earlier battery power discharge is charged again.
As follows in conjunction with preferred embodiment and accompanying drawing to the detailed description of the invention:
The accompanying drawing simple declaration:
Fig. 1: the circuit block diagram of charge and discharge device of the present invention;
Fig. 2: the circuit diagram of charge and discharge device shown in Figure 1.
As shown in Figure 1, it is the circuit square frame of charge and discharge device of the present invention, the present invention comprises at least with lower device: battery pack 18, is in order to provide first switch 12 and the second switch 13 whether battery pack 18 chargings required DC power feeding mechanism 10, a load 11,10 pairs of battery pack 18 of a control DC power supply are charged, when second switch 13 conductings, described battery pack 18 can be discharged by load 11.
One Switch Control device 14, in order to compare the current potential VB of a particular value ST and battery pack 18, when the current potential VB of battery pack 18 is higher than particular value ST, then with second switch 13 conductings, otherwise then with 12 conductings of first switch.
One automatic charged activation device 15, in order to select to battery pack 18 directly charge or earlier to battery pack 18 discharges charge again.
One charging holding device 16, when the current potential VB of battery pack 18 after discharge is lower than described particular value ST, Switch Control device 14 is closed second switch 13 and conducting first switch 12, charging holding device 16 is then exported a control signal PD, makes the switch 12 of winning remain in conducting state in order to control switch device 14 always; When battery pack 18 is taken out in by described external discharge/charging device, then trigger a reset signal RS, described control signal PD is eliminated, and makes Switch Control device 14 recover regular events.
Fig. 2 is the circuit diagram corresponding to Fig. 1 embodiment, and among Fig. 2, DC power supply 10 is a power supply change-over device, and it receives external voltage (as civil power) 30, and is converted into the direct current constant current source; Load 11 is made up of resistor.One battery charge controller 24 is in order to the temperature, the voltage that detect battery pack and the control and treatment of being correlated with (caution of for example charging, discharge, reference voltage etc. is provided).
In this embodiment, first switch 12 is a PMOS element, and when its conducting, then 10 pairs of battery pack 18 of DC power supply are charged.
In this embodiment, first switch 13 is a PMOS element, and when its conducting, then straight pond group 18 is discharged by resistive load 11.
In this embodiment, sampler 20 is made of two serial resistance device R1 and R2, in order to a sampling value VREF corresponding to the potential value VBd of battery pack to be provided.
In this embodiment, Switch Control device 14 comprises: one first comparator 14a, in order to a more described sampling value VREF and a particular value ST; One second comparator 14b is in order to the value of the output signal Va of the more described sampling value VREF and the first comparator 14a; And one the 3rd comparator 14c, in order to the value of the output signal Va of the sampling value VREF and the first comparator 14a relatively.
In this embodiment, charged activation device 15 is a selector switch device (a for example selector button) automatically, is coupled between the sampling value output (vref signal end) and earth terminal of sampler 20; Battery pack 18 is directly charged or earlier battery power discharge carried out charged state again in order to selecting.Below, just directly battery pack 18 is charged and, be illustrated respectively two kinds of situations that battery pack 18 is discharged and afterwards recharged earlier.
When the user selects directly charging by described automatic discharge, charging activation device 15 (for example by next selection button), then described selector switch device 15 conductings make the voltage of output sampling value VREF of sampler be grounded.Because so particular value ST must be high potential " H " greater than the output Va of the VREF first comparator 14a, so Va also is respectively high potential " H " and electronegative potential " L " greater than the output Vb and the Vc of VREF second and the 3rd comparator (14b, 14c) again.Nmos pass transistor N1 is driven and conducting (not conducting of nmos pass transistor N2) by the output Vb of second comparator, and then with the PMOS conducting of first switch 12, and make 10 pairs of battery pack 18 of described DC power supply directly charge.
When the user selects discharge earlier (not pressing the selection button) when afterwards recharging by described automatic charged activation device 15, then described selector switch device 15 can conducting, so the sampling value VREF of sampler 20 outputs is fully corresponding to the potential value of battery pack 18.
As sampling value VREF during greater than described particular value, the output Va of the first comparator 14a is electronegative potential " L ", and Va is also less than VREF, so the output Vb of the second and the 3rd comparator (14b, 14c) and Vc are respectively electronegative potential " L " and high potential " H " again.So nmos pass transistor N2 is driven and conducting (not conducting of nmos pass transistor N1) by the output Vc of the 3rd comparator 14c, and then with the PMOS element conductive of second switch 13, and make battery pack 18 discharge by resistive load 11.
Yet, battery pack 18 switches to non-loaded under the state that load (during discharge) arranged and will charge the time, the current potential VB of battery pack 18 can rise suddenly, can cause sampling value VREF once again greater than particular value ST, so will make second switch 13 logical once again and discharge.Thus, battery pack 18 will be in discharge-charging-discharge ... the periodic cycle state, like this, can't reach the purpose that battery pack 18 is charged.
Therefore, the present invention utilizes charging holding device 16 especially, to solve described problem.In the present embodiment, charging holding device 16 is made of a voltage pull device 16a and a reset apparatus 16b.
The output of voltage pull device 16a couples the sampling output of described sampler 20, and its input couples the output signal Va of the described first comparator 14a.
When the sampling value VREF of battery pack 18 discharge afterpotential VB is lower than particular value ST, the first comparator 14a output enable signal (Va is high potential " H "), to start described voltage pull device 16a, the output control signal PD of voltage pull device 16a forces sampling value VREF to remain on state less than particular value ST.So, when battery pack 18 switches to when non-loaded from load is arranged,, but, and make first switch 12 keep conducting states because sampling value VREF still keeps less than particular value ST even the current potential VB of battery pack 18 raises suddenly.Therefore, make the charged state of battery pack be continued to carry out.
In this embodiment, voltage pull device 16a is coupled to a voltage source device 22 by reset apparatus 16b.Voltage pull device 16a comprises at least: a PNP transistor QP and a NPN transistor QN.Wherein, the collector electrode of PNP transistor QP is coupled to the base stage of NPN transistor QN; The collector electrode of NPN transistor QN couples the base stage of PNP transistor QP.Be connected with a capacitor C between the base stage of NPN transistor QN and emitter.
After battery pack 18 discharges, when the sampling value VREF of current potential VB is lower than particular value ST, the first comparator 14a output enable signal (high potential " H "), make transistor QN conducting, because transistor QN and QP form the structure of similar controllable silicon (SCR), so its output signal PD can remain on the standard of low-voltage position, thus force the voltage of sampling value VREF to be dragged down, and reach described function.
Reset apparatus 16b when battery pack 18 is taken out in by external discharge/charging device, is then eliminated described control signal PD, makes Switch Control device 14 recover regular events.
In this embodiment, described reset apparatus 16b is a switching device that is made of the PNP transistor, is coupled between voltage pull device 16a and the voltage source device 22.
When being positioned over battery pack 18 in described external discharge/charging device, then described reset apparatus 16b conducting by the current potential voltage division signal RS (reset signal) of described battery pack, described power supply are able to by the required power supply of device 16b service voltage pull device.When battery pack 18 was taken out in by described external discharge/charging device, described reset apparatus 16b was owing to loss signal RS closes.So described power supply 22 is cut off, described control signal PD becomes the suspension joint signal, so can not influence sampling value VREF again, makes described Switch Control device 14 recover regular event.
Compared with prior art, the present invention has following effect:
From the above, by the present invention, the user can select to battery pack directly charge or earlier battery pack is discharged after external discharge/charging device of being charged again; Therefore, can be in time to the battery pack charging of discharging, improving the accuracy of inside battery checkout gear, and the useful life that prolongs battery pack.
More than narration is to borrow preferred embodiment that architectural feature of the present invention is described, is not to be used to limit protection scope of the present invention.
Claims (13)
1, a kind of charge and discharge device comprises: a direct current power supply device and a load;
It is characterized in that, also comprise: one first switch, a second switch, a Switch Control device and a charging holding device;
Load is connected with a battery pack to be charged via second switch;
DC power supply connects battery pack via first switch, and the electric power that provides batteries charging required is provided;
The Switch Control device is connected with DC power supply, charging holding device, battery pack, first switch and second switch respectively;
When the current potential of battery pack is higher than a particular value, second switch conducting, otherwise first switch conduction; When the current potential of battery pack was lower than a particular value, under the control of Switch Control device, second switch was closed, first switch conduction, the charging holding device is then exported a control signal, in order to the control switch switching control, makes first switch keep conducting state always; When battery pack by device in when taking out, then control signal will be eliminated, and the Switch Control device recovers regular event.
2, device according to claim 1 is characterized in that, described Switch Control device is a comparator circuit that compares in order to potential value and particular value to battery pack, when described potential value is lower than particular value, and described first switch conduction; Otherwise described second switch conducting.
3, device according to claim 2 is characterized in that, described comparator circuit comprises: two comparators;
First comparator is in order to the potential value and the described particular value of more described battery pack;
Second comparator is in order to the output valve of the potential value and first comparator of more described battery pack;
When described potential value during less than the output valve of described first comparator, then described first switch conduction; Otherwise, described second switch conducting.
4, device according to claim 3 is characterized in that, described comparator circuit also comprises: one the 3rd comparator, in order to the potential value of the output valve and the described battery pack of more described first comparator;
When the output valve of described the 3rd comparison means during greater than the potential value of described battery pack, the 3rd comparator is exported a signal and is made described first switch conduction; Otherwise the output signal of then described second comparator makes described second switch conducting.
5, device according to claim 1 is characterized in that, described charging holding device comprises:
One voltage pull device, when the current potential of described battery pack was lower than described particular value, the voltage pull device was triggered, to export described control signal;
One reset apparatus, battery pack is by in the device when taking out, and reset apparatus is activated, and described control signal is eliminated, and makes described Switch Control device recover regular event.
6, device according to claim 1 is characterized in that, described DC power supply is a conversion equipment, is converted into direct voltage in order to receive external voltage.
7, device according to claim 1 is characterized in that, also comprises an automatic charged activation device, and it is connected with described Switch Control device, in order to selection described battery pack is directly charged and still earlier battery power discharge is charged again.
8, a kind of charge and discharge device comprises: a direct current power supply device and a load;
It is characterized in that, also comprise: one first switch, a second switch, a Switch Control device, charging holding device, a sampler and an automatic charged activation device; Load is connected with a battery pack to be charged via second switch;
DC power supply connects battery pack via first switch, and the electric power that provides batteries charging required is provided;
The Switch Control device is connected with DC power supply, charging holding device, sampler, first switch and second switch respectively;
Sampler is connected with battery pack, thinks the potential value sampling of battery pack;
The Switch Control device comprises: three comparators;
First comparator is in order to compare a sampling value and a particular value;
Second comparator is in order to compare the value of the sampling value and first comparator output signal;
The 3rd comparator is in order to compare the value of the sampling value and first comparator output signal;
When sampling value is higher than particular value, second switch conducting, otherwise first switch conduction;
Automatically charged activation device connects Switch Control device and battery pack, battery pack is directly charged or earlier battery power discharge is charged again in order to selection;
The charging holding device couples sampler and Switch Control device;
When the current potential of battery pack after discharge is lower than particular value, by the triggering of first comparator output signal, and export a control signal, control described Switch Control device to make first switch keep conducting state always; When battery pack by device in when taking out, described control signal is eliminated, and makes the Switch Control device recover regular event.
9, device according to claim 8 is characterized in that, described charging holding device comprises:
One voltage pull device, its output couples described sampler, and input couples the output signal of described first comparator; When the current potential after the described battery power discharge is lower than described particular value, the first comparator output enable signal, the starting resistor pull device is exported described control signal, make described sampling value remain on state, make described Switch Control device that described first switch is continued to remain on conducting state less than particular value;
One reset apparatus, when battery pack by device in when taking out, then described control signal is eliminated, and makes the Switch Control device recover regular event.
10, device according to claim 9 is characterized in that, described reset apparatus is-switching device to be coupled between a described voltage pull device and the power supply;
When described battery pack is positioned in the charge and discharge device, then switching device conducting by the current potential dividing potential drop of described battery pack, described power supply is able to supply with the required power supply of described voltage pull device by switching device; When battery pack was taken out in by charge and discharge device, switching device cut out and cuts off the electricity supply, and described control signal will be eliminated, and made described Switch Control device recover regular event.
According to claim 9 or 10 described devices, it is characterized in that 11, described voltage pull device comprises: a PNP transistor and a NPN transistor;
PNP, transistorized collector and emitter are coupled to the base stage and the described reset apparatus of NPN transistor respectively; The collector electrode of NPN transistor couples transistorized base stage of PNP and described reset apparatus, its grounded emitter.
12, device according to claim 8 is characterized in that, described automatic charged activation device is a choice device, is coupled between the output and ground of described sampler; When selecting directly charging, the choice device conducting, make sampler the decline of output sampling value voltage and less than described particular value, and with described first switch conduction.
13, device according to claim 8 is characterized in that, described DC power supply is a conversion equipment, in order to receive external voltage and to be converted into direct voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99102878A CN1079176C (en) | 1999-03-11 | 1999-03-11 | Charging-discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99102878A CN1079176C (en) | 1999-03-11 | 1999-03-11 | Charging-discharging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1267116A CN1267116A (en) | 2000-09-20 |
| CN1079176C true CN1079176C (en) | 2002-02-13 |
Family
ID=5271029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99102878A Expired - Fee Related CN1079176C (en) | 1999-03-11 | 1999-03-11 | Charging-discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1079176C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080081524A (en) | 2007-03-05 | 2008-09-10 | 삼성전자주식회사 | Computer and battery charging method thereof |
| CN101373893B (en) * | 2007-08-24 | 2012-09-05 | 鹏智科技(深圳)有限公司 | Over temperature protection circuit for battery |
| CN102402832A (en) * | 2010-09-17 | 2012-04-04 | 中芯国际集成电路制造(上海)有限公司 | Controller and infrared bijection perimeter alarm system |
| US9368983B2 (en) | 2011-12-15 | 2016-06-14 | The Boeing Company | Autonomous lithium-ion battery protection |
| CN103997114B (en) * | 2014-05-20 | 2015-12-02 | 中煤电气有限公司 | Self can the hedging energy storage source of automatic discharging |
| CN107508355B (en) * | 2017-09-07 | 2019-03-01 | 维沃移动通信有限公司 | A kind of voltage control method and charging equipment |
| CN107681885B (en) * | 2017-09-12 | 2019-09-17 | 深圳市瑞康宏业科技开发有限公司 | A kind of power-down retaining circuit and method |
-
1999
- 1999-03-11 CN CN99102878A patent/CN1079176C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1267116A (en) | 2000-09-20 |
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Granted publication date: 20020213 Termination date: 20120311 |