CN104300505A - Protective circuit for storage battery - Google Patents

Protective circuit for storage battery Download PDF

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Publication number
CN104300505A
CN104300505A CN201410445645.6A CN201410445645A CN104300505A CN 104300505 A CN104300505 A CN 104300505A CN 201410445645 A CN201410445645 A CN 201410445645A CN 104300505 A CN104300505 A CN 104300505A
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CN
China
Prior art keywords
storage battery
comparator
resistance
electronic switch
charging
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Pending
Application number
CN201410445645.6A
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Chinese (zh)
Inventor
费新华
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费新华
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Publication date
Application filed by 费新华 filed Critical 费新华
Priority to CN201410445645.6A priority Critical patent/CN104300505A/en
Publication of CN104300505A publication Critical patent/CN104300505A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a protective circuit for a storage battery. In the work process of an existing storage battery, the storage battery only has charging protection but lacks discharging protection, and the capacity and service life of the storage battery will be damaged due to excessive discharging. The protective circuit for the storage battery comprises a charging power source, the storage battery and a charging protective circuit, wherein the charging power source is connected with the storage battery through the charging protective circuit, and the storage battery is connected with a load through a discharging protective circuit. The charging power source is connected with the storage battery through the charging protective circuit, the storage battery is connected with the load through the discharging protective circuit, excessive charging in the charging process can be prevented, excessive discharging in the discharging process can be also prevented, normal use of the storage battery is guaranteed, and the capacity and service life of the storage battery are protected.

Description

A kind of secondary battery protection circuit
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, 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; 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 the theory diagram of a kind of secondary battery protection circuit 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; 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. a secondary battery protection circuit, 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), 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, described electronic switch I is with described load in series and be connected on described accumulator anode and cathode, 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).
2. secondary battery protection circuit according to claim 1; 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.
3. secondary battery protection circuit according to claim 2, is characterized in that: connecting luminous diode (D2) between the collector electrode of described NPN type triode (Q1) and described storage battery (1) positive pole.
4. secondary battery protection circuit according to claim 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).
CN201410445645.6A 2013-01-15 2013-01-15 Protective circuit for storage battery Pending CN104300505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410445645.6A CN104300505A (en) 2013-01-15 2013-01-15 Protective circuit for storage battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410445645.6A CN104300505A (en) 2013-01-15 2013-01-15 Protective circuit for storage battery

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

Publications (1)

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CN104300505A true CN104300505A (en) 2015-01-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105743188A (en) * 2016-05-13 2016-07-06 信阳师范学院 Plumbic acid battery pack protection system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN102163839A (en) * 2010-02-24 2011-08-24 精工爱普生株式会社 Protection circuit and electronic device
CN102801192A (en) * 2012-08-10 2012-11-28 江苏大学 Wireless sensor network node solar charging and storage battery discharging protective circuit
CN203205846U (en) * 2013-01-15 2013-09-18 费新华 Storage battery protection circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN102163839A (en) * 2010-02-24 2011-08-24 精工爱普生株式会社 Protection circuit and electronic device
CN102801192A (en) * 2012-08-10 2012-11-28 江苏大学 Wireless sensor network node solar charging and storage battery discharging protective circuit
CN203205846U (en) * 2013-01-15 2013-09-18 费新华 Storage battery protection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105743188A (en) * 2016-05-13 2016-07-06 信阳师范学院 Plumbic acid battery pack protection system

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Application publication date: 20150121

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