CN104283195A - Storage battery protection circuit preventing overcharge - Google Patents
Storage battery protection circuit preventing overcharge Download PDFInfo
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- CN104283195A CN104283195A CN201410446101.1A CN201410446101A CN104283195A CN 104283195 A CN104283195 A CN 104283195A CN 201410446101 A CN201410446101 A CN 201410446101A CN 104283195 A CN104283195 A CN 104283195A
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- storage battery
- comparator
- resistance
- protection circuit
- electronic switch
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- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a storage battery protection circuit preventing overcharge. In the working process of an existing storage battery, the existing storage battery only has the charging protection function and is lack of the discharging protection function, over-discharge will damage the capacity of the storage battery and shorten the service life of the storage battery. The storage battery protection circuit preventing overcharge comprises a charging source, a storage battery and a charging protection circuit. The charging source is connected with the storage battery through the charging protection circuit. The storage battery is connected with loads through a discharging protection circuit. Due to the facts that the charging source is connected with the storage battery through the charging protection circuit and the storage battery is connected with the loads through the discharging protection circuit, overcharge can be prevented in the charging process, over-discharge can also be prevented in the discharging process, normal use of the storage battery is guaranteed, and the capacity and the service life of the storage battery are protected.
Description
The application is divisional application, and original bill application number is 2013100146460, and the applying date is on January 15th, 2013, and denomination of invention is a kind of secondary battery protection circuit.
Technical field
The present invention relates to power circuit technical field, specifically refer to a kind of secondary battery protection circuit.
Background technology
In use, through charging process and discharge process, wherein charging process has protective circuit to protect to storage battery often, and discharge process but lacks protection, when battery discharging is excessive, and infringement storage battery itself that can be serious.For lead acid accumulator, if electric discharge excessively, by making lead sulfate crystal form larger body, this not only adds the resistance of pole plate, and be difficult to make it restore when charging, directly affect capacity and the life-span of storage battery.
Summary of the invention
The invention provides a kind of secondary battery protection circuit preventing overcharging, both can prevent storage battery from overcharging, storage battery over-discharge can have been prevented again.
In order to solve the problems of the technologies described above; the present invention adopts following technical scheme: a kind of secondary battery protection circuit preventing overcharging; comprise charge power supply, storage battery and charge protector; described charge power supply connects storage battery through charge protector, and described storage battery connects load through discharge protection circuit.
As preferably; described discharge protection circuit comprises electric discharge comparator and electronic switch I; described electric discharge comparator connects electronic switch I and transmits control signal to it; the in-phase input end of described electric discharge comparator and reverse input end are connected on described accumulator anode and cathode, and described electronic switch I is with described load in series and be connected on described accumulator anode and cathode.Electric discharge comparator detects the voltage at storage battery two ends, and when battery discharging is excessive, when the voltage at storage battery two ends decreases beyond predetermined value, electric discharge comparator controls the operating circuit that electronic switch I disconnects storage battery, protection storage battery.
As preferably, described electric discharge comparator is differential-voltage comparator, its reverse input end connects the negative pole of the first voltage stabilizing didoe on the one hand, the positive pole of the storage battery described in connecting through the first resistance on the other hand, the second resistance and the 3rd resistance is connected in series between described accumulator anode and cathode, described differential comparator positive input is connected on the tie point of the second resistance and the 3rd resistance, the input of the electronic switch I described in output connection of differential comparator.The voltage at storage battery two ends is detected with differential-voltage comparator, when normally working, its reverse input end voltage lower than the voltage on its in-phase input end, when battery tension decrease beyond predetermined value, its reverse input end voltage higher than the voltage on its in-phase input end, the output of differential-voltage comparator send cut-off signals to electronic switch I.
As preferably, described electronic switch I comprises NPN type triode and relay, the base stage of the NPN type triode described in described electric discharge comparator output terminal connects, the negative pole of the storage battery described in emitter connection of described NPN type triode, the relay signal control end described in collector electrode connects.The shutoff of NPN type triode control relay, electric discharge comparator controls the switch of NPN type triode, and NPN type triode and relay combination realization are to the automatic control of circuit and working stability is reliable.
As preferably, connecting luminous diode between the collector electrode of described NPN type triode and described battery positive voltage.Light-Emitting Diode is as indicator light, and whether instruction storage battery discharges excessively.
As preferably, described charge protector comprises charging comparator and electronic switch II, electronic switch II is connected with described charge power supply and is connected on described accumulator anode and cathode, the reverse input end of described charging comparator connects the negative pole of the second voltage stabilizing didoe on the one hand, a stabilized voltage power supply is connected on the other hand through the 4th resistance, the 5th resistance and the 6th resistance is connected in series between described accumulator anode and cathode, described charging comparator positive input is connected on the tie point of the 5th resistance and the 6th resistance, the input of the electronic switch II described in output connection of charging comparator.In charging process, whether the voltage that charging comparator detects on storage battery has exceeded the preset value determined by stabilized voltage power supply, when exceeding preset value then charging complete, cut-off signals is sent to electronic switch II by charging comparator, complete charging, prevent from overcharging, infringement storage battery.
After adopting technique scheme; tool of the present invention has the following advantages: charge power supply connects storage battery through charge protector; described storage battery connects load through discharge protection circuit; not only can prevent from overcharging in charging process; over-discharge can also be prevented in discharge process; ensure that storage battery normally uses, the capacity of protection storage battery and life-span.A whole set of circuit controls automatically, easy to use, controls accurately stable.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Fig. 1 is a kind of theory diagram preventing the secondary battery protection circuit overcharged of the present invention;
Fig. 2 is physical circuit connection layout of the present invention.
Embodiment
See Fig. 1 and Fig. 2; a kind of secondary battery protection circuit preventing overcharging; comprise charge power supply, storage battery 1 and charge protector 2; described charge power supply connects storage battery through charge protector 2; described storage battery connects load 4 through discharge protection circuit 3, not only can prevent from overcharging in charging process, can also prevent over-discharge can in discharge process; ensure that storage battery normally uses, the capacity of protection storage battery and life-span.Described discharge protection circuit 3 comprises electric discharge comparator and electronic switch I; described electric discharge comparator connects electronic switch I and transmits control signal to it; the in-phase input end of described electric discharge comparator and reverse input end are connected on described accumulator anode and cathode, and described electronic switch I is connected with described load 4 and is connected on described storage battery 1 both positive and negative polarity.Described electric discharge comparator is differential-voltage comparator U1, its reverse input end connects the negative pole of the first voltage stabilizing didoe D1 on the one hand, the positive pole of the storage battery described in connecting through the first resistance R1 on the other hand, the second resistance R2 and the 3rd resistance R3 is connected in series between described accumulator anode and cathode, described differential-voltage comparator U1 positive input is connected on the tie point of the second resistance R2 and the 3rd resistance R3, the input of the electronic switch I described in output connection of differential-voltage comparator U1.The voltage at storage battery 1 two ends is detected with differential-voltage comparator U1, when regular picture works, its reverse input end voltage lower than the voltage on its in-phase input end, when storage battery 1 voltage drop exceedes predetermined value, its reverse input end voltage higher than the voltage on its in-phase input end, the output of differential-voltage comparator U1 sends cut-off signals to electronic switch I, terminates the electric discharge work of storage battery 1, prevents storage battery 1 over-discharge can.
Described electronic switch I comprises NPN type triode Q1 and relay R L1, the base stage of the NPN type triode Q1 described in described electric discharge comparator output terminal connects, the negative pole of the storage battery described in emitter connection of described NPN type triode Q1, the relay signal control end described in collector electrode connects.The shutoff of NPN type triode Q1 control relay RL1, differential-voltage comparator U1 controls the switch of NPN type triode Q1, and NPN type triode Q1 and relay R L1 combination realization is to the automatic control of circuit and working stability is reliable.Between the collector electrode of described NPN type triode Q1 and described storage battery 1 positive pole, connecting luminous diode D2, light-emitting diode D2 are as indicator light prompting storage battery 1 whether over-discharge can, are convenient to user and intuitively check.
Described charge protector 2 comprises charging comparator U2 and electronic switch II, electronic switch II is connected with described charge power supply and is connected on described storage battery 1 both positive and negative polarity, the reverse input end of described charging comparator U2 connects the negative pole of the second voltage stabilizing didoe D3 on the one hand, a stabilized voltage power supply is connected on the other hand through the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 is connected in series between described accumulator anode and cathode, described charging comparator positive input is connected on the tie point of the 5th resistance R5 and the 6th resistance R6, the input of the electronic switch II described in output connection of charging comparator U2.Described stabilized voltage power supply can be obtained by voltage-stabiliser tube by charge power supply, and described electronic switch II can select the design of the electronic switch I in discharge protection circuit 3.In charging process, whether the voltage that charging comparator U2 detects on storage battery 1 has exceeded the preset value determined by stabilized voltage power supply, when exceeding preset value then charging complete, cut-off signals is sent to electronic switch II by charging comparator U2, complete charging, prevent from overcharging, infringement storage battery.
Claims (4)
1. the secondary battery protection circuit preventing from overcharging, comprise charge power supply, storage battery (1) and charge protector (2), described charge power supply connects storage battery through charge protector (2), described storage battery connects load (4) through discharge protection circuit (3), it is characterized in that: described charge protector (2) comprises charging comparator (U2) and electronic switch II, electronic switch II is connected with described charge power supply and is connected on described storage battery (1) both positive and negative polarity, the reverse input end of described charging comparator (U2) connects the negative pole of the second voltage stabilizing didoe (D3) on the one hand, a stabilized voltage power supply is connected on the other hand through the 4th resistance (R4), the 5th resistance (R5) and the 6th resistance (R6) is connected in series between described storage battery (1) both positive and negative polarity, described charging comparator (U2) positive input is connected on the tie point of the 5th resistance (R5) and the 6th resistance (R6), the input of the electronic switch II described in output connection of charging comparator (U2).
2. prevent the secondary battery protection circuit overcharged according to claim 1; it is characterized in that: described discharge protection circuit (3) comprises electric discharge comparator and electronic switch I; described electric discharge comparator connects electronic switch I and transmits control signal to it; the in-phase input end of described electric discharge comparator and reverse input end are connected on described storage battery (1) both positive and negative polarity, and described electronic switch I is with described load in series and be connected on described accumulator anode and cathode.
3. prevent the secondary battery protection circuit overcharged according to claim 2, it is characterized in that: described electric discharge comparator is differential-voltage comparator (U1), its reverse input end connects the negative pole of the first voltage stabilizing didoe (D1) on the one hand, the positive pole of the storage battery described in connecting through the first resistance (R1) on the other hand, the second resistance (R2) and the 3rd resistance (R3) is connected in series between described accumulator anode and cathode, described differential-voltage comparator (U1) positive input is connected on the tie point of the second resistance (R2) and the 3rd resistance (R3), the input of the electronic switch I described in output connection of differential-voltage comparator (U1).
4. according to Claims 2 or 3, prevent the secondary battery protection circuit overcharged; it is characterized in that: described electronic switch I comprises NPN type triode (Q1) and relay (RL1); the base stage of the NPN type triode (Q1) described in described electric discharge comparator output terminal connects; the negative pole of the storage battery (1) described in emitter connection of described NPN type triode (Q1), the signal controlling end of the relay (RL1) described in collector electrode connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410446101.1A CN104283195A (en) | 2013-01-15 | 2013-01-15 | Storage battery protection circuit preventing overcharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410446101.1A CN104283195A (en) | 2013-01-15 | 2013-01-15 | Storage battery protection circuit preventing overcharge |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310014646.0A Division CN103117536B (en) | 2013-01-15 | 2013-01-15 | Storage battery protective circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104283195A true CN104283195A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410446101.1A Pending CN104283195A (en) | 2013-01-15 | 2013-01-15 | Storage battery protection circuit preventing overcharge |
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| Country | Link |
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| CN (1) | CN104283195A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105790422A (en) * | 2016-04-13 | 2016-07-20 | 深圳市大疆创新科技有限公司 | Unmanned aerial vehicle outage cruising method, device and system |
| CN106159897A (en) * | 2016-08-31 | 2016-11-23 | 钟兴明 | A kind of multipurpose is waited power fluctuation broken circuit control device |
| CN110556970A (en) * | 2019-08-20 | 2019-12-10 | 朔黄铁路发展有限责任公司 | charging and discharging control circuit, power generation and supply control system and electric locomotive |
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| US20090278501A1 (en) * | 2008-05-09 | 2009-11-12 | Neotec Semiconductor Ltd. | Smart battery protector with impedance compensation |
| CN201393059Y (en) * | 2009-03-31 | 2010-01-27 | 拓实电子（深圳）有限公司 | Solar controller |
| CN201466691U (en) * | 2009-06-26 | 2010-05-12 | 山东科明太阳能光伏有限公司 | Solar cell charging and discharging controller |
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| CN2655586Y (en) * | 2003-10-14 | 2004-11-10 | 上海超日太阳能科技发展有限公司 | Solar controller for lamps |
| CN201004559Y (en) * | 2006-12-29 | 2008-01-09 | 深圳市赛格导航科技股份有限公司 | A charging and discharging circuit for backup battery of vehicular electronic device |
| US20090278501A1 (en) * | 2008-05-09 | 2009-11-12 | Neotec Semiconductor Ltd. | Smart battery protector with impedance compensation |
| CN201393059Y (en) * | 2009-03-31 | 2010-01-27 | 拓实电子（深圳）有限公司 | Solar controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105790422A (en) * | 2016-04-13 | 2016-07-20 | 深圳市大疆创新科技有限公司 | Unmanned aerial vehicle outage cruising method, device and system |
| CN106159897A (en) * | 2016-08-31 | 2016-11-23 | 钟兴明 | A kind of multipurpose is waited power fluctuation broken circuit control device |
| CN106159897B (en) * | 2016-08-31 | 2018-06-15 | 钟兴明 | A kind of multipurpose is waited power fluctuation broken circuit control device |
| CN110556970A (en) * | 2019-08-20 | 2019-12-10 | 朔黄铁路发展有限责任公司 | charging and discharging control circuit, power generation and supply control system and electric locomotive |
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