CN1330068C - Secondary cell charging-discharging automatic cut-off device - Google Patents
Secondary cell charging-discharging automatic cut-off device Download PDFInfo
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- CN1330068C CN1330068C CNB031400930A CN03140093A CN1330068C CN 1330068 C CN1330068 C CN 1330068C CN B031400930 A CNB031400930 A CN B031400930A CN 03140093 A CN03140093 A CN 03140093A CN 1330068 C CN1330068 C CN 1330068C
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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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Abstract
The present invention discloses an automatically cutting off device for secondary battery charge and discharge, which aims to achieve the technical purposes that the reliability of the automatically cutting off device for secondary battery discharge is enhanced and the cost is reduced in a battery unit loop. The present invention has the technical scheme that the charging loop of the automatically cutting off device for secondary battery charge and discharge is formed from the order connection of a charging power supply, a first switching contact switch, the battery unit loop, a second switching contact switch and a sixth diode; a discharging loop is formed from the order connection of a discharging power supply, a fifth diode, the second switching contact switch, the battery unit loop, the first switching contact switch and a seventh diode. A diode is positively connected in series to the battery unit loop at a battery discharging direction. A battery and both ends of the positively in series connected diode are connected with a discharging and shunting diode in parallel. Compared with the prior art, the present invention automatically cuts off battery discharge by using the positively cutting off characteristic of diodes, has high reliability, does not need manual detection, and reduces use and maintenance cost.
Description
Technical field
The present invention relates to a kind of charging/discharging of secondary cell automatic cut-off device, particularly a kind of in the battery charging and discharging chemical synthesis technology of secondary cell production process and discharging and recharging in the processing procedure of battery working service, battery discharge voltage is carried out the charging/discharging apparatus of automatic cut-off for preventing battery over-discharge.
Background technology
In chargeable secondary cell production process, battery needs battery is discharged and recharged activation after assembling is finished.Constant current mode is regularly adopted in charging usually, and it is complete that discharge then requires battery electric quantity to put fully; In the shipment or use of rechargeable battery,, also usually need to carry out the discharge fully of battery for the initial carrying capacity of adjusting battery or in order to eliminate the memory effect of battery.Usually these discharges are to adopt the external power supply forced electric discharge to carry out to the mode of battery cutoff voltage.Reach behind the cut-ff voltage of battery as untimely stopping, battery continues discharge just may overdischarge, cell voltage vanishing or negative value, and inside battery active material structure will be damaged, and may occur the leakage and the blast of battery in the time of seriously.
One of charging/discharging of secondary cell equipment of prior art constitutes charging circuit by the dc constant flowing power of 120V, 50 battery unit loops, diode D6; Constitute discharge circuit by 60V dc constant flowing power, diode D1,50 battery unit loops, diode D7.The switching of charge-discharge circuit is undertaken by ganged switch.
Be connected with a secondary cell in the battery unit loop,, all need to be connected in series a device that has discharge voltage by function in each battery unit loop in order to prevent the overdischarge of battery.
For having the device of discharge voltage by function, the first method of traditional design is made of battery and manual switchover contact switch.In discharge process, with the artificial battery both end voltage value of constantly measuring, when reaching or be lower than battery cutoff voltage, the position of the switch is switched to 2 by 1 with staff, stop the discharge process of monocell.This scheme exists in implementation process and influenced by human factor, as when being discharged to assigned voltage, timely diverter switch, and battery still continues discharge, causes to put and waste product occurs.
The second method of traditional design, on the basis of said apparatus, use electronic computer that the battery both end voltage in the cell voltage discharge process is constantly scanned, samples, sampled data is delivered to CPU after mould/number conversion, compare with the data that preset, as when being less than or equal to battery cutoff voltage, CPU sends stop signal, through I/O by computer control relay diverter switch position by 1 to 2, stop the discharge of monocell.This scheme exists use cost and maintenance cost height, causes shortcomings such as job insecurity after relay contact is aging.
Summary of the invention
The purpose of this invention is to provide a kind of charging/discharging of secondary cell automatic cut-off equipment, the technical problem that solve is that the reliability that improves secondary cell discharge automatic cut-off device in the battery unit loop reduces cost again.
The present invention by the following technical solutions, a kind of charging/discharging of secondary cell automatic cut-off equipment, by charge power supply, the first double-throw contact switch, the battery unit loop, the second double-throw contact switch and the 60 diode sequence connect to form charge circuit, by discharge power supply, the 100 diode, the second double-throw contact switch, the battery unit loop, the first double-throw contact switch and the 70 diode sequence connect to form discharge loop, in the described battery unit loop, be serially connected with diode along battery discharge direction forward, battery is connected in series diode two ends forward and is parallel with the discharge shunt diode with forward.
The present invention has the charge tunnel diode along the diode two ends reverse parallel connection of battery discharge direction forward serial connection.
The present invention is one to five along the diode of battery discharge direction forward serial connection, and the charge tunnel diode is one, and the discharge shunt diode is one.
Battery in the battery unit of the present invention loop is Ni-MH battery or nickel-cadmium cell, and the diode that is connected in series along battery discharge direction forward is two.
The present invention selects 1N5404 for use along two diodes, charge tunnel diode and the discharge shunt diode of battery discharge direction forward serial connection.
Battery in the battery unit of the present invention loop is a lead-acid battery, and the diode that is connected in series along battery discharge direction forward is three.
The present invention selects 1N5404 for use along three diodes, charge tunnel diode and the discharge shunt diode of battery discharge direction forward serial connection.
Charging/discharging of secondary cell automatic cut-off equipment of the present invention is in series by 50 battery unit loops, and charge power supply is a constant-current source, and charging voltage is DC120V, and discharge power supply is a constant-current source, and discharge voltage is DC72V.
The present invention compared with prior art, in the battery unit loop, along battery discharge direction forward serial connection diode, battery is connected in series diode two ends forward and is parallel with the discharge shunt diode with forward, utilize the forward cut-off characteristics of diode, the automatic cut-off battery discharge has high reliability, and must manual detection, reduce and use and maintenance cost.
Description of drawings
Fig. 1 is a charging/discharging of secondary cell circuitry schematic diagram.
Fig. 2 is that available technology adopting is manually controlled the battery unit loop diagram that discharge ends.
Fig. 3 is the battery unit loop diagram that scan control discharge ends that uses a computer in the prior art.
Fig. 4 is battery unit loop circuit figure of the present invention.
Fig. 5 is the embodiment of the invention (one's) circuit theory diagrams.
Fig. 6 is the battery unit loop diagram of the embodiment of the invention ().
Fig. 7 is the embodiment of the invention (twos') circuit theory diagrams.
Fig. 8 is the battery unit loop diagram of the embodiment of the invention (two).
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Before explanation, do earlier as giving a definition:
Diode D1, D2 along battery discharge direction forward serial connection ... single the forward conduction voltage drop V of Dn
DExpression, the overall presure drop Vn=n that n only connects * V
D
Discharge shunt diode D301 forward conduction voltage drop V
D301Expression;
Charge tunnel diode D201 forward conduction voltage drop V
D201Expression;
Cell voltage V
BATExpression.
As shown in Figure 1, by the intermediate contact A4 of the upper contact A1 of constant-current source, the first double-throw contact switch and intermediate contact A2 point closure, series connected battery element loop, the second double-throw contact switch with lower contact A5 point is closed, the 60 diode D60, protective tube F1, get back to the constant-current source composition charge circuit that is linked in sequence; By the intermediate contact A2 of the upper contact A6 of constant-current source, the 100 diode D100, the second double-throw contact switch and intermediate contact A4 point closure, series connected battery element loop, the first double-throw contact switch with lower contact A3 point is closed, the 70 diode D70, protective tube F1, get back to the constant-current source composition discharge loop that is linked in sequence.
As shown in Figure 4, the battery unit loop is serially connected with the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 to the 51 diode D51 along the anodal forward of course of discharge, battery, the negative pole two ends reverse parallel connection of the positive pole of the first diode D1 and the 51 diode D51 has charge tunnel diode D201, and the battery unit loop is parallel with discharge shunt diode D301 along the negative pole of course of discharge, battery and the negative pole two ends forward of the 51 diode D51.
The first to the 51 diode, charge tunnel diode D201 and discharge shunt diode D301 select 1N5404 for use, the 100 diode D100, the 60 diode D60 and the 70 diode D70 select 6A07 for use, the charging voltage of constant-current source is DC120V, and discharge voltage is DC72V.
During charging, the upper contact A1 of the first double-throw contact switch and intermediate contact A2 point are closed, the intermediate contact A4 of the second double-throw contact switch and lower contact A5 point are closed, and electric current is got back to constant-current source through constant-current source, the first double-throw contact switch, battery unit loop, the second double-throw contact switch, the 60 diode D60, protective tube F1.Charging current Ic flows through each battery unit loop by B to A, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 to the 51 diode D51 oppositely end in the battery unit loop, discharge shunt diode D301 also is in oppositely and ends, electric current flows through by charge tunnel diode D201, charge the battery, each battery charge is Ic, and battery unit loop terminal voltage is V
MT+ V
D201
During discharge, the upper contact A6 of the second double-throw contact switch and intermediate contact A4 point are closed, the intermediate contact A2 of the first double-throw contact switch and lower contact A3 point are closed, and electric current is got back to constant-current source through constant-current source, the 100 diode D100, the second double-throw contact switch, battery unit loop, the first double-throw contact switch, the 70 diode D70, protective tube F1.Discharging current Id flows through each battery unit loop by A to B, charge tunnel diode D201 oppositely ends, electric current can only flow through from battery and the first diode D1, the second diode D2, the series via of the 3rd diode D3, the 4th diode D4 to the 51 diode D51 formation or the shunt diode D301 that discharges, and works as Vn-V
BAT＜V
D301The time, discharge shunt diode D301 can not conducting, and electric current will flow through from battery and make battery discharge, work as Vn-V
BAT＞V
D301The time, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 to the 51 diode D51 can not conductings, electric current will flow through from discharge shunt diode D301 and make battery no longer continue discharge, therefore if discharge time enough, just can be with the closed circuit voltage V of battery
BATClamp down at Vn-V effectively
BATNear.
Therefore, we can select suitable diode combinations, make Vn-V
BATFinal discharging voltage near needing just can reach the effect of battery discharge automatic cut-off.
Embodiment one: the automatic cut-off charging/discharging apparatus of ni-mh, nickel-cadmium cell.
As shown in Figure 5, constitute by the discharge constant-current supply of the charging constant-current supply of 120V, 72V and 50 battery unit loops and diverter switch etc.As shown in Figure 6, in each battery unit loop, be connected with the first diode D1, the second diode D2 that connects along battery discharge direction forward with the positive pole of battery, battery, the first diode D1 and the second diode D2 series circuit two ends forward are parallel with discharge shunt diode D301 and with the first diode D1, the second diode D2 two ends reverse parallel connection charge tunnel diode D201 are arranged.The first diode D1, the second diode D2, discharge shunt diode D301 and charge tunnel diode D201 all adopt the 1N5404 silicon rectifier diode, and forward conduction voltage checks in from handbook and is 0.7V, and the actual measurement forward voltage drop is 0.72V when 1000mA.
Electric current I c flows into from B during charging, flows out from A behind charge tunnel diode D201, battery, and the first diode D1, the second diode D2 and discharge shunt diode D301 are in oppositely and end, and all electric currents are used for battery charge.
During discharge, electric current I d is flowed into by A, and charge tunnel diode D201 is in oppositely and ends.
When beginning to discharge,
Vn＝V
D1+V
D2＝0.72V+0.72V＝1.44V
V
AB＝Vn-V
BAT＝1.44-V
BAT
Because the discharge voltage of NI-G, Ni-MH battery is normally between 1.0-1.4V, so V
ABNormal is between the 0.04-0.44, and less than 1N5404 silicon rectifier diode forward conduction voltage, discharge shunt diode D301 is in cut-off state, the battery continuous discharge.
After discharge a period of time, along with battery institute accumulate can descend V
AB=Vn-V
BATIncrease gradually, when cell voltage drops to discharge cut-off voltage scope such as 0.7V, V
EB=Vn-V
BAT=1.44-0.70=0.74V, greater than the forward conduction voltage of discharge shunt diode D301, discharge shunt diode D301 conducting.Because it is big that the internal resistance of cell adds that the first diode D1 and the second diode D2 forward resistance compare discharge shunt diode D301 forward resistance, most of electric current is from discharge shunt diode D301 shunting, when cell voltage is lower than 0.7V, almost all electric current is all from discharge shunt diode D301 shunting, be equivalent to battery and be disconnected, played and stop the effect of discharging automatically.Actual test is discharged to the 1000mAh battery with the electric current of 1000mA, if with the manual element loop of prior art shown in Figure 2, and switching circuit not behind the 90min, the battery both end voltage will reach-more than the 1.8V, and the generation exhaust and the phenomenon of leakage; And adopt battery unit of the present invention loop, even 24hr does not cut off the electricity supply, what the voltage at battery two ends also was stabilized clamps down on about 0.5 to 0.6V, guarantees that the antipole discharge does not appear in battery.
Embodiment two: the automatic cut-off charging/discharging apparatus of lead-acid battery.
As shown in Figure 7, constitute by the discharge constant-current supply of the charging constant-current supply of 120V, 72V and 30 battery unit loops and diverter switch etc.As shown in Figure 8, in each battery unit loop, be in series with the first diode D1, the second diode D2 and the 3rd diode D3 at anode along the course of discharge forward, battery, the first diode D1, the second diode D2 and the 3rd diode D3 series circuit two ends forward are parallel with discharge shunt diode D301, with the first diode D1, the second diode D2 and the 3rd diode D3 two ends reverse parallel connection charge tunnel diode D201 are arranged.The first diode D1, the second diode D2, the 3rd diode D3, charge tunnel diode D201 and discharge shunt diode D301 all adopt the 1N5404 silicon rectifier diode, forward conduction voltage checks in from handbook and is 0.7V, and the actual measurement forward voltage drop is 0.72V when 1000mA.
Electric current I c flows into from B during charging, flows out from A behind charge tunnel diode D201, battery, and the first diode D1, the second diode D2, the 3rd diode D3 and discharge shunt diode D301 are in oppositely and end, and all electric currents are used for battery charge.
During discharge, electric current I d is flowed into by A, and charge tunnel diode D201 is in oppositely and ends.When beginning to discharge,
V
n＝3xV
D3＝3x0.72V＝2.16V
V
AB＝V
n-V
BAT＝2.16-V
BAT
Because the discharge voltage of lead-acid battery is normally between 1.7-2.2V, so V
ABNormally be-0.04-0.46 between, less than 1N5404 silicon rectifier diode forward conduction voltage, discharge shunt diode D301 is in cut-off state, the battery continuous discharge.
After discharge a period of time, along with battery institute accumulate can descend V
AB=V
n-V
BATIncrease gradually, when cell voltage drops to discharge cut-off voltage scope such as 1.4V, V
AB=V
n-V
BAT=2.16-1.40=0.76V, greater than the forward conduction voltage of discharge shunt diode D301, discharge shunt diode D301 conducting.Because it is big that the internal resistance of cell adds that the first diode D1, the second diode D2 and the 3rd diode D3 forward resistance compare discharge shunt diode D301 forward resistance, most of electric current is from discharge shunt diode D301 shunting, when cell voltage is lower than 1.4V, almost all electric current is all from discharge shunt diode D301 shunting, be equivalent to battery and be disconnected, played and stop the effect of discharging automatically.Actual test is discharged to the 1000mAh battery with the electric current of 1000mA, if with the manual element loop of prior art shown in Figure 2, and switching circuit not behind the 90min, the battery both end voltage will reach-more than the 3.5V, and the generation exhaust and the phenomenon of leakage; And adopt battery unit of the present invention loop, even 24hr does not cut off the electricity supply, what the voltage at battery two ends also was stabilized clamps down on about 1.3 to 1.4V, guarantees that the antipole discharge does not appear in battery.
Embodiments of the invention are the application at the charging/discharging apparatus of NI-G, Ni-MH battery and lead-acid battery, but are not limited only to this.If select suitable diode combinations, also can be, can fill on the charging/discharging apparatus of other secondary cells such as alkali manganese and be applied at lithium ion battery, zinc-nickel cell.
The present invention compares with the manual switching of prior art, tool under cost increase prerequisite seldom Higher reliability is arranged, saved manual detection and switched required human cost; With the employing meter The prior art that calculation machine scanning is switched is compared that stability is improved and has obviously been reduced and uses and tie up Protect cost.
Claims (8)
1. charging/discharging of secondary cell automatic cut-off equipment, by charge power supply, the first double-throw contact switch, the battery unit loop, the second double-throw contact switch and the 60 diode sequence connect to form charge circuit, by discharge power supply, the 100 diode, the second double-throw contact switch, the battery unit loop, the first double-throw contact switch and the 70 diode sequence connect to form discharge loop, it is characterized in that: in the described battery unit loop, be serially connected with diode along battery discharge direction forward, battery is connected in series diode two ends forward and is parallel with the discharge shunt diode with forward.
2. charging/discharging of secondary cell automatic cut-off equipment according to claim 1 is characterized in that: described diode two ends reverse parallel connection along battery discharge direction forward serial connection has the charge tunnel diode.
3. charging/discharging of secondary cell automatic cut-off equipment according to claim 2 is characterized in that: described diode along battery discharge direction forward serial connection is one to five, and the charge tunnel diode is one, and the discharge shunt diode is one.
4. charging/discharging of secondary cell automatic cut-off equipment according to claim 3 is characterized in that: the battery in the described battery unit loop is Ni-MH battery or nickel-cadmium cell, and the diode that is connected in series along battery discharge direction forward is two.
5. charging/discharging of secondary cell automatic cut-off equipment according to claim 4 is characterized in that: described two diodes along battery discharge direction forward serial connection, charge tunnel diode and discharge shunt diode are selected 1N5404 for use.
6. charging/discharging of secondary cell automatic cut-off equipment according to claim 3 is characterized in that: the battery in the described battery unit loop is a lead-acid battery, and the diode that is connected in series along battery discharge direction forward is three.
7. charging/discharging of secondary cell automatic cut-off equipment according to claim 6 is characterized in that: described three diodes along battery discharge direction forward serial connection, charge tunnel diode and discharge shunt diode are selected 1N5404 for use.
8. according to arbitrary described charging/discharging of secondary cell automatic cut-off equipment in the claim 1 to 7, it is characterized in that: described charging/discharging of secondary cell automatic cut-off equipment is in series by 50 battery unit loops, charge power supply is a constant-current source, charging voltage is DC120V, discharge power supply is a constant-current source, and discharge voltage is DC72V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031400930A CN1330068C (en) | 2003-08-04 | 2003-08-04 | Secondary cell charging-discharging automatic cut-off device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031400930A CN1330068C (en) | 2003-08-04 | 2003-08-04 | Secondary cell charging-discharging automatic cut-off device |
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| CN1581632A CN1581632A (en) | 2005-02-16 |
| CN1330068C true CN1330068C (en) | 2007-08-01 |
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| CNB031400930A Expired - Fee Related CN1330068C (en) | 2003-08-04 | 2003-08-04 | Secondary cell charging-discharging automatic cut-off device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825255A (en) * | 2014-03-19 | 2014-05-28 | 航天科技控股集团股份有限公司 | Standby battery charging and discharging protection circuit for car-mounted terminal equipment |
| CN104092204A (en) * | 2014-06-26 | 2014-10-08 | 青岛浩海网络科技股份有限公司 | Overcurrent protection intelligent switch for forest fire prevention and overcurrent protection method thereof |
| CN112054563A (en) * | 2019-06-05 | 2020-12-08 | 深圳市瑞能实业股份有限公司 | Follow current switching circuit and battery formation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037137C (en) * | 1991-04-05 | 1998-01-21 | 杨泰和 | Automatic charge cut-off circuit and application |
| US5714867A (en) * | 1996-08-19 | 1998-02-03 | The United States Of America As Represented By The Secretary Of The Army | Termination at preset voltage level |
| JPH10126979A (en) * | 1996-10-17 | 1998-05-15 | Sanyo Electric Co Ltd | Backup power supply circuit of combustion machine |
-
2003
- 2003-08-04 CN CNB031400930A patent/CN1330068C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037137C (en) * | 1991-04-05 | 1998-01-21 | 杨泰和 | Automatic charge cut-off circuit and application |
| US5714867A (en) * | 1996-08-19 | 1998-02-03 | The United States Of America As Represented By The Secretary Of The Army | Termination at preset voltage level |
| JPH10126979A (en) * | 1996-10-17 | 1998-05-15 | Sanyo Electric Co Ltd | Backup power supply circuit of combustion machine |
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| CN1581632A (en) | 2005-02-16 |
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