CN110518674A - Charging and discharging lithium battery circuit - Google Patents
Charging and discharging lithium battery circuit Download PDFInfo
- Publication number
- CN110518674A CN110518674A CN201910899795.7A CN201910899795A CN110518674A CN 110518674 A CN110518674 A CN 110518674A CN 201910899795 A CN201910899795 A CN 201910899795A CN 110518674 A CN110518674 A CN 110518674A
- Authority
- CN
- China
- Prior art keywords
- triode
- resistance
- unit
- connect
- lithium battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 110
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000007599 discharging Methods 0.000 title claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 30
- 230000005611 electricity Effects 0.000 claims description 10
- 230000005856 abnormality Effects 0.000 abstract description 12
- 230000002159 abnormal effect Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Charging and discharging lithium battery circuit of the invention passes through setting control chip, constant current unit, constant pressure unit, mode selecting unit, charge/discharge unit, reverse connecting protection unit and alarm unit.When lithium battery is reversely connected in charging mode, the test side of control chip detects that lithium battery is in reversal connection state, the control output end output low level signal of chip is controlled into optical coupler OP1, optical coupler OP1 is connected, at this time, due to optical coupler OP1 the 3rd foot input be external negative supply, at this time, the base potential of triode 4Q5 is lower than the current potential of emitter, triode 4Q5 is off state at this time, triode 4VT3 also can not just be connected, and voltage can not be just input in the lithium battery of reversal connection, and safety greatly promotes；In addition, the setting of alarm unit, when lithium battery is when in an abnormal state, the low level signal of control chip output can allow Light-emitting diode LED 1 to shine, and user can be in abnormality learning lithium battery at the first time.
Description
Technical field
The present invention relates to battery charging and discharging technical fields, more particularly to a kind of charging and discharging lithium battery circuit.
Background technique
It is a kind of by lithium metal or lithium alloy is negative electrode material, using the electricity of non-aqueous electrolytic solution currently, " lithium battery "
Pond.Lithium metal battery is proposed and is studied by Gilbert N.Lewis earliest within 1912.When the 1970s,
M.S.Whittingham is proposed and the lithium ion battery that begins one's study.Since the chemical characteristic of lithium metal is very active, so that lithium is golden
Processing, preservation, the use of category, it is very high to environmental requirement.With the development of science and technology, present lithium battery has become master
Stream.Lithium battery is broadly divided into two classes: lithium metal battery and lithium ion battery.Lithium ion battery does not contain the lithium of metallic state, and
And it can charge.5th generation product lithium metal battery of rechargeable battery 1996 be born, safety, specific capacity,
Self-discharge rate and the ratio of performance to price are superior to lithium ion battery.It is now only a small number of since the high-tech of its own requires limitation
The company of several countries is producing this lithium metal battery.
In order to allow lithium battery preferably to carry out charge and discharge process, existing lithium battery can all be configured with charge-discharge circuit progress
It uses.Existing charge-discharge circuit, majority be using triode on state characteristic by lithium battery can charge and discharge, for example, utilize
The triode of NPN type inputs positive pressure to the base stage of NPN triode, NPN tri- is connected when needing to charge to lithium battery
Pole pipe allows external power supply to charge lithium battery；When needing lithium battery to discharge, negative pressure is inputted to the base stage of NPN triode,
End NPN triode, do not allow external power supply to charge lithium battery, remaining electronic device in lithium battery and circuit is allowed to constitute
Discharge loop discharges.Lithium battery is reversely connected in charging mode in order to prevent, and existing charge-discharge circuit can all arrange in pairs or groups one
Chip is controlled, when lithium battery reversal connection, control chip exports low level signal, NPN triode is ended, external power supply just can not
It charges to lithium battery.Although above-mentioned mode can prevent lithium battery from carrying out charging operations to lithium battery when being reversely connected, also
It is existing defects, when due to lithium battery reversal connection, the emitter of the cathode access NPN triode of lithium battery, and control chip input
Low level be input into the base stage of NPN triode, at this point, the base potential of NPN triode is still than the hair of NPN triode
Emitter potential is high, and NPN triode still may be switched on, and external power supply is still very possible defeated by voltage in this case
Enter into the lithium battery of reversal connection, there are very big security risks.
In addition, existing charge-discharge circuit, there is no the functions of early warning, when lithium battery is abnormal, when user the first
Interior to be not aware that lithium battery is abnormal situation, user also can not just make rapidly abnormality processing measure within first time,
Equally there is also very big security risks.
Summary of the invention
The purpose of the present invention is overcoming shortcoming in the prior art, when providing one kind can prevent lithium battery to be reversely connected,
Prevent completely external power supply will voltage input into the lithium battery of reversal connection, damage lithium battery, it is highly-safe and work as lithium
Battery can inform the charging and discharging lithium battery circuit of user at the first time when being abnormal.
The purpose of the present invention is achieved through the following technical solutions:
A kind of charging and discharging lithium battery circuit, comprising:
Chip is controlled, the test side of the control chip with lithium battery for connecting；
Constant current unit, the first input end of the constant current unit is connect with the first output end of the control chip, described
Second input terminal of constant current unit and the cathode of lithium battery connect；
The cathode of constant pressure unit, the first input end of the constant pressure unit and lithium battery connects, and the of the constant pressure unit
The anode of two input terminals and lithium battery connects, and the second output terminal of the reference edge of the constant pressure unit and the control chip connects
It connects；
Mode selecting unit, the first input end of the mode selecting unit are connect with external positive voltage source, the mode
Second input terminal of selecting unit is connect with external negative supply, the third input terminal of the mode selecting unit and the constant pressure
The output end of unit connects, and the 4th input terminal of the mode selecting unit is connect with the output end of the constant current unit；
Charge/discharge unit, the charge/discharge unit include resistance 4R3, triode 4Q5, triode 4VT3, triode 4Q6,
Triode 4VT4, diode 4D2 and diode 4D3, resistance 4R3 described in the base series of the triode 4Q5 be used as described in fill
The first input end of discharge cell is connect with the output end of the constant current unit, and the collector of the triode 4Q5 and outside are just
Voltage source connection, the base stage of the triode 4VT3 are connect with the emitter of the triode 4Q5, the collection of the triode 4VT3
Electrode is connect with the collector of the triode 4Q5, and the emitter of the triode 4VT3 is as the defeated of the charge/discharge unit
The anode of outlet and lithium battery connects, second input terminal and institute of the base stage of the triode 4Q6 as the charge/discharge unit
State the output end connection of mode selecting unit, the emitter series connection resistance 4R7 of the triode 4Q6 and the triode
The emitter of 4Q5 connects, and the base stage of the triode 4VT4 is connect with the emitter of the triode 4Q6, the triode
The emitter of 4VT4 is grounded, and the collector of the triode 4VT4 is connect with the emitter of the triode 4VT3, two pole
The anode of pipe 4D2 is connect with the base stage of the triode 4Q5, and the cathode of the diode 4D2 is as the charge/discharge unit
Control signal is connect with the control output end of the cathode of the diode 4D3 and the control chip respectively, the diode
The anode of 4D3 is connect with the base stage of the triode 4Q6；
Reverse connecting protection unit, the reverse connecting protection unit include optical coupler OP1 and resistance RA, and the 1st of the optical coupler OP1 the
The foot series connection resistance RA is connect with external positive voltage source, and the control of the 2nd foot of the optical coupler OP1 and the control chip is defeated
Outlet connection, the 3rd foot of the optical coupler OP1 are connect with external negative supply, the 4th foot and described three of the optical coupler OP1
The base stage of pole pipe 4Q5 connects；And
Alarm unit, the alarm unit include Light-emitting diode LED 1, triode Q4, resistance R23, resistance R55 and two
Pole pipe D4, the base stage of the triode Q4 are connect with one end of the resistance R23, described in the other end conduct of the resistance R23
The first input end of alarm unit is connect with the control output end of the cathode of the diode D4 and the control chip respectively, institute
The plus earth of diode D4 is stated, the emitter of the triode Q4 is connect with the cathode of the Light-emitting diode LED 1, described
The anode of Light-emitting diode LED 1 is connect as the second input terminal of the alarm unit with external positive voltage source, the resistance
One end of R55 is connect with the collector of the triode Q4, the other end ground connection of the resistance R55.
In a wherein embodiment, the constant current unit includes galvanostat 4U1, resistance 4R1, resistance 4R2, resistance
4R9 and resistance 4RS1, the normal phase input end of the galvanostat 4U1 connect the resistance 4R1 as the constant current unit first
Input terminal, the inverting input terminal of the galvanostat 4U1 are connected second input terminal of the resistance 4R2 as the constant current unit,
The output end of the galvanostat 4U1 is connected output end of the resistance 4R9 as the constant current unit, and the one of the resistance 4RS1
End is connect with the cathode of battery, the other end ground connection of the resistance 4RS1.
In a wherein embodiment, the constant current unit further includes capacitor 4C1, resistance 4R6 and capacitor 4C2, described
One end of capacitor 4C1 is connect with the normal phase input end of the galvanostat 4U1, the other end of the capacitor 4C1 and the resistance 4R6
One end connection, the other end of the resistance 4R6 connect with one end of the capacitor 4C2, the other end of the capacitor 4C2 and institute
State the output end connection of galvanostat 4U1.
In a wherein embodiment, the constant current unit further includes capacitor 4C3, the capacitor 4C3 and the resistance
4RS1 is connected in parallel.
In a wherein embodiment, the triode 4Q5, triode 4VT3, triode 4Q6 and triode 4VT4 are equal
For NPN triode.
In a wherein embodiment, the resistance value of the resistance RA is 1.8K Ω.
In a wherein embodiment, the triode Q4 is PNP triode.
The present invention compared with the prior art the advantages of and have the beneficial effect that:
Charging and discharging lithium battery circuit of the invention controls chip, constant current unit, constant pressure unit, model selection by setting
Unit, charge/discharge unit, reverse connecting protection unit and alarm unit.When lithium battery is reversely connected in charging mode, chip is controlled
Test side detects that lithium battery is in reversal connection state, and the control output end for controlling chip exports low level signal to optical coupler OP1
In, be connected optical coupler OP1, at this point, due to optical coupler OP1 the 3rd foot input be external negative supply, at this point, triode 4Q5
Base potential it is lower than the current potential of emitter, triode 4Q5 is in off state at this time, and triode 4VT3 also can not just be connected,
The voltage of external positive voltage source can not be just input in the lithium battery of reversal connection, prevent from also filling it under lithium battery reversal connection state
Electricity, safety greatly promote；In addition, the setting of alarm unit, when lithium battery is when in an abnormal state, control chip exports low
Level signal can allow Light-emitting diode LED 1 to shine, and allow user that can be in abnormality learning lithium battery at the first time, just
Relevant abnormalities treatment measures are made with prestissimo in user.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the module diagram of the battery charging and discharging system in one embodiment of the present invention；
Fig. 2 is the circuit theory schematic diagram of the battery charging and discharging system in one embodiment of the present invention；
Fig. 3 is the circuit theory schematic diagram of the constant current unit in one embodiment of the present invention；
Fig. 4 is the circuit theory schematic diagram of the constant pressure unit in one embodiment of the present invention；
Fig. 5 is the circuit theory schematic diagram of the mode selecting unit in one embodiment of the present invention；
Fig. 6 is the circuit theory schematic diagram of the charge/discharge unit in one embodiment of the present invention；
Fig. 7 is the circuit theory schematic diagram of the reverse connecting protection unit in one embodiment of the present invention；
Fig. 8 is the circuit theory schematic diagram of the alarm unit in one embodiment of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
Referring to Fig. 1, a kind of charging and discharging lithium battery circuit 10 includes control chip 100, constant current unit 200, constant pressure unit
300, mode selecting unit 400, charge/discharge unit 500, reverse connecting protection unit 600 and alarm unit 700.
It is thus desirable to explanation, control chip 100 plays the role of control, for being in abnormality when lithium battery
When, it exports corresponding level signal and closes charging and discharging lithium battery circuit 10, prevent battery to be under abnormality and also work；
Constant current unit 200 is for allowing lithium battery to carry out charge/discharge operation with pre-set current value；Constant pressure unit 300 is for allowing lithium battery with pre-
If voltage value carries out charge/discharge operation；Mode selecting unit 400 is for allowing battery to be in charge mode or discharge mode；Charge and discharge
Electric unit 500 is used for charge/discharge operation；Reverse connecting protection unit 600 plays the role of that lithium battery is prevented to be reversely connected；Prewarning unit 700 rises
To the effect of early warning, when lithium battery is when in an abnormal state, the control signal execution sended over according to control chip 100 is corresponding
Early warning operation, notify user.
It should be noted that in this application, there are three external power supply has altogether, one be voltage+12V the positive piezoelectricity in outside
Source；One is the positive voltage source in the outside that voltage is+7V；Another is the external negative supply that voltage is -8V, three external power supplies
Play the role of power supply.
Referring to Fig. 1, the test side of control chip 100 with lithium battery for connecting.
It is thus desirable to explanation, the test side of control chip 100 is used to detect the current state of lithium battery, when lithium electricity
When pond is abnormal, exports corresponding level signal and execute corresponding abnormality processing operation.
Referring to Fig. 1, the first input end of constant current unit 200 is connect with the first output end of control chip 100, constant current list
Second input terminal of member 200 and the cathode of lithium battery connect.
It is thus desirable to explanation, constant current unit 200 is for allowing lithium battery to carry out charge/discharge operation with pre-set current value.
Referring to Fig. 1, the first input end of constant pressure unit 300 and the cathode of lithium battery connect, the second of constant pressure unit 300
The anode of input terminal and lithium battery connects, and the reference edge of constant pressure unit 300 is connect with the second output terminal of control chip 100.
It is thus desirable to explanation, constant pressure unit 300 is for allowing lithium battery to carry out charge/discharge operation with preset voltage value.
Referring to Fig. 1, the first input end of mode selecting unit 400 is connect with external positive voltage source, mode selecting unit
400 the second input terminal is connect with external negative supply, third input terminal and the constant pressure unit 300 of mode selecting unit 400
Output end connection, the 4th input terminal of mode selecting unit 400 are connect with the output end of constant current unit 200.
It is thus desirable to explanation, mode selecting unit 400 is for allowing battery to be in charge mode or discharge mode.
Also referring to Fig. 1, Fig. 2 and Fig. 6, charge/discharge unit 500 include resistance 4R3, triode 4Q5, triode 4VT3,
Triode 4Q6, triode 4VT4, diode 4D2 and diode 4D3, the base series resistor 4R3 of triode 4Q5 is as charge and discharge
The first input end of electric unit 500 is connect with the output end of constant current unit 200, the collector of triode 4Q5 and external positive piezoelectricity
Source connection, the base stage of triode 4VT3 are connect with the emitter of triode 4Q5, the collector and triode 4Q5 of triode 4VT3
Collector connection, the anode connection of the emitter of triode 4VT3 as the output end and lithium battery of charge/discharge unit, three poles
The base stage of pipe 4Q6 is connect as the second input terminal of charge/discharge unit 500 with the output end of mode selecting unit 400, triode
The emitter series resistance 4R7 of 4Q6 is connect with the emitter of triode 4Q5, the base stage of triode 4VT4 and the hair of triode 4Q6
Emitter-base bandgap grading connection, the emitter ground connection of triode 4VT4, the collector of triode 4VT4 are connect with the emitter of triode 4VT3, and two
The anode of pole pipe 4D2 is connect with the base stage of triode 4Q5, control signal of the cathode of diode 4D2 as charge/discharge unit
It is connect respectively with the control output end of the cathode of diode 4D3 and control chip 100, the anode and triode 4Q6 of diode 4D3
Base stage connection.
Also referring to Fig. 1, Fig. 2 and Fig. 7, reverse connecting protection unit 600 includes optical coupler OP1 and resistance RA, optical coupler OP1
The 1st foot series resistance RA connect with external positive voltage source, the 2nd foot of optical coupler OP1 and the control output end company of control chip
It connects, the 3rd foot of optical coupler OP1 is connect with external negative supply, and the 4th foot of optical coupler OP1 is connect with the base stage of triode 4Q5.
It is thus desirable to explanation, when lithium battery is reversely connected in charging mode, the test side detection of control chip 100
It is in reversal connection state to lithium battery, the control output end output low level signal of control chip 100 is into optical coupler OP1, conducting
Optical coupler OP1, at this point, due to optical coupler OP1 the 3rd foot input be external negative supply, at this point, the base stage of triode 4Q5
Current potential is lower than the current potential of emitter, and triode 4Q5 is in off state at this time, and triode 4VT3 also can not just be connected, and outside is just
The voltage of voltage source can not be just input in the lithium battery of reversal connection, prevent from also charging to it under lithium battery reversal connection state, peace
Full property greatly promotes.Specifically, triode 4Q5, triode 4VT3, triode 4Q6 and triode 4VT4 are NPN triode.
Also referring to Fig. 1, Fig. 2 and Fig. 8, alarm unit 700 includes Light-emitting diode LED 1, triode Q4, resistance
The base stage of R23, resistance R55 and diode D4, triode Q4 are connect with one end of resistance R23, and the other end of resistance R23 is as report
The first input end of alert unit 700 is connect with the control output end of the cathode of diode D4 and control chip 100 respectively, diode
The emitter of the plus earth of D4, triode Q4 is connect with the cathode of Light-emitting diode LED 1, the anode of Light-emitting diode LED 1
The second input terminal as alarm unit is connect with external positive voltage source, and one end of resistance R55 and the collector of triode Q4 connect
It connects, the other end ground connection of resistance R55.
It is thus desirable to explanation, the setting of alarm unit 700 controls chip when lithium battery is when in an abnormal state
The low level signal of 100 outputs can allow Light-emitting diode LED 1 to shine, and allow user that can learn that at the first time lithium battery is in
Abnormality makes relevant abnormalities treatment measures convenient for user with prestissimo.
Specifically, the resistance value of resistance RA is 1.8K Ω；Triode Q4 is PNP triode.
Further, also referring to Fig. 1, Fig. 2 and Fig. 3, in one embodiment, constant current unit 200 includes galvanostat
4U1, resistance 4R1, resistance 4R2, resistance 4R9 and resistance 4RS1, the normal phase input end series resistance 4R1 of galvanostat 4U1 is as permanent
Flow the first input end of unit 200, the inverting input terminal series resistance 4R2 of galvanostat 4U1 is second defeated as constant current unit 200
Enter end, output end of the output end series resistance 4R9 of galvanostat 4U1 as constant current unit 200, one end of resistance 4RS1 and battery
Cathode connection, resistance 4RS1 the other end ground connection.
It is thus desirable to which explanation, when constant current unit 200 starts work, carries out charge and discharge to battery with the current value of 2mA
When electricity work, the voltage of the output end of galvanostat 4U1 is the resistance value of 2mA* resistance 4RS1 at this time, that is, can guarantee lithium battery with default
Current value 2mA carries out charge/discharge operation；The normal phase input end input of galvanostat 4U1 is the control signal for controlling chip 100, permanent
What the inverting input terminal of stream device 4U1 inputted is the signal of the resistance value of 2mA* resistance 4RS1；Resistance 4R1, resistance 4R2 and resistance 4R9
Play the role of current limliting, resistance 4R1, resistance 4R2 prevent galvanostat 4U1 from damaging, resistance 4R9 is used for protecting galvanostat 4U1
In the electronic component for protecting subsequent related function module.
It should also be noted that, constant current unit 200 also acts as output phase and closes level signal extremely in addition to playing the role of constant current
Mode selecting unit 400 allows mode selecting unit 400 that battery is allowed to be in charge mode and is in discharge mode.In the application
In, when galvanostat 4U1 exports positive pressure signal, i.e. high level signal, battery is in charge mode；When galvanostat 4U1 output is negative
When pressing signal, i.e., low level signal, battery are in discharge mode.
Further, referring to Fig. 3, in one embodiment, constant current unit 200 further includes capacitor 4C1, resistance
One end of 4R6 and capacitor 4C2, capacitor 4C1 are connect with the normal phase input end of galvanostat 4U1, the other end and resistance of capacitor 4C1
One end of 4R6 connects, and the other end of resistance 4R6 is connect with one end of capacitor 4C2, and the other end of capacitor 4C2 is with galvanostat 4U1's
Output end connection.
It is thus desirable to which explanation, capacitor 4C1, resistance 4R6 and capacitor 4C2 form gain compensation network, gain benefit is played
The effect repaid improves the job stability of galvanostat 4U1.
Further, referring to Fig. 3, in one embodiment, constant current unit 200 further includes capacitor 4C3, capacitor
4C3 is connected in parallel with resistance 4RS1.
It is thus desirable to explanation, capacitor 4C3 plays the role of filtering, eliminates noise signal.
Further, also referring to Fig. 1, Fig. 2 and Fig. 4, in one embodiment, constant pressure unit 300 includes barostat
4U2A, barostat 4U2B, resistance 4R16, resistance 4R10, resistance 4R15, resistance 4R11, resistance 4R12, resistance 4R8, resistance 4R5,
Resistance 4R4, capacitor 4C4, resistance 4R17, resistance 4R18 and triode 4Q2, the inverting input terminal sequential series electricity of barostat 4U2A
Hinder the first input end of 4R10 and resistance 4R16 as constant pressure unit 300, the normal phase input end sequential series electricity of barostat 4U2A
Hinder second input terminal of the 4R11 and resistance 4R15 as constant pressure unit, the output end series resistance 4R5 and constant pressure of barostat 4U2A
The normal phase input end of device 4U2B connects, and one end of resistance 4R8 is connect with the inverting input terminal of barostat 4U2A, and resistance 4R8's is another
One end is connect with the output end of barostat 4U2A, and one end of resistance 4R12 is connect with the normal phase input end of barostat 4U2A, resistance
The other end of 4R12 is grounded, and the inverting input terminal of barostat 4U2B is connect with one end of resistance 4R4, and the other end of resistance 4R4 is made
For the reference edge of constant pressure unit 300, output end of the output end of barostat 4U2B as constant pressure unit 300, one end of capacitor 4C4
It is connect with the inverting input terminal of barostat 4U2B, the other end of capacitor 4C4 is connect with the output end of barostat 4U2B, triode
The base stage of 4Q2 is connect with one end of one end of resistance 4R17 and resistance 4R18 respectively, the other end and barostat of resistance 4R17
The output end of 4U2B connects, and the other end of resistance 4R18 is connect with the emitter of triode 4Q2, and the emitter of triode 4Q2 connects
The collector on ground, triode 4Q2 is connect with charge/discharge unit 500.Specifically, the collector of triode 4Q2 is with triode 4Q5's
Base stage connection.
It is thus desirable to explanation, when constant pressure unit 300 starts work, barostat 4U2A is connected by normal phase input end
The cathode of lithium battery, inverting input terminal connect the anode of lithium battery, the current voltage value of acquisition battery, then barostat 4U2A
Output end is inputted to the normal phase input end of barostat 4U2B, and the inverting input terminal of barostat 4U2B passes through control chip 100 1
Reference voltage value, reference voltage value are artificial preset value, for example, when needing lithium battery to carry out charge and discharge process with the constant pressure value of 2V
When, the inverting input terminal of barostat 4U2B inputs the voltage value that a reference voltage value is 2V, the output of final barostat 4U2B
End exports relevant level signal, allows lithium battery to enter pressure constant state using the saturation state of triode 4Q2.
It should be noted resistance 4R16, resistance 4R10, resistance 4R15, resistance 4R11, resistance 4R12 and resistance 4R8
Differential networks are formed, make the signal for being input to barostat 4U2A more accurate and are stablized, guarantee that barostat 4U2A can be preferably
Output；Resistance 4R5 plays the role of current limliting, protects barostat 4U2B, prevents from leading to barostat 4U2B because of overcurrent；Capacitor
4C4 plays the role of gain compensation；Resistance 4R17 and resistance 4R18 play the role of partial pressure.
Further, also referring to Fig. 1, Fig. 2 and Fig. 5, in one embodiment, mode selecting unit 400 includes electricity
The collector series resistance 4R1 of 4R1, triode 4Q1 and resistance 4R14, triode 4Q1 are hindered, one end of resistance 4R1 is alternatively
The first input end of unit, second input of the emitter series resistance 4R14 of triode 4Q1 as mode selecting unit 400
End, third input terminal of the other end of 4R1 as mode selecting unit 400, the base stage of triode 4Q1 is as mode selecting unit
400 the 4th input terminal, output end of the collector of triode 4Q1 as mode selecting unit 400.
It is thus desirable to explanation, when needing that lithium battery is allowed to enter charge mode, constant current unit 200 exports a height
Level signal to triode 4Q1 base stage, at this point, triode 4Q1 be switched on, due to the collector series resistance of triode 4Q1
It is connect after 4R1 with external positive voltage source+12V, the emitter series resistance 4R14 and outside negative supply -8V of triode 4Q1 connects
It connects, therefore, when triode 4Q1 conducting, the base potential of triode 4Q6 is pulled low at this time, and the base stage of triode 4Q6 is low electricity
Position, triode 4Q6 are off state, and equally, triode 4VT4 is off state, and since the output end of galvanostat 4U1 exports
Be high level signal, at this time triode 4Q5 be switched on, triode 4VT3 is also turned on, at this time the collector of triode 4VT3
Positive voltage source+the 7V in the outside of connection can be input in lithium battery, also just complete the charging operations to lithium battery.
When needing to allow when needing that lithium battery is allowed to enter discharge mode, constant current unit 200 exports a low level signal extremely
In the base stage of triode 4Q1, triode 4Q1 ends at this time, and the base stage of triode 4Q6 is high potential, and triode 4Q6 is switched on,
Triode 4VT4 is also turned on, but due to the base stage of triode 4Q5 input be low level signal, at this time triode 4Q5 end,
Triode 4VT3 is ended, and triode 4Q6, triode 4VT4 and lithium battery constitute discharge loop at this time, and lithium battery is also at
Discharge mode.
When battery is abnormal, controlling chip 100 at this time can be recognized by test side, no matter in charging mode
Or under discharge mode, the control output end of control chip 100 can all export a low level signal, due to triode 4Q5, three
Pole pipe 4VT3, triode 4Q6 and triode 4VT4 are NPN triode, all can be by the base stage input low level signal the case where
Cut-off, also it is prevented that lithium battery also carries out charge and discharge process under abnormality, and then leads to the damage of lithium battery.
Charging and discharging lithium battery circuit of the invention controls chip, constant current unit, constant pressure unit, model selection by setting
Unit, charge/discharge unit, reverse connecting protection unit and alarm unit.When lithium battery is reversely connected in charging mode, chip is controlled
Test side detects that lithium battery is in reversal connection state, and the control output end for controlling chip exports low level signal to optical coupler OP1
In, be connected optical coupler OP1, at this point, due to optical coupler OP1 the 3rd foot input be external negative supply, at this point, triode 4Q5
Base potential it is lower than the current potential of emitter, triode 4Q5 is in off state at this time, and triode 4VT3 also can not just be connected,
The voltage of external positive voltage source can not be just input in the lithium battery of reversal connection, prevent from also filling it under lithium battery reversal connection state
Electricity, safety greatly promote；In addition, the setting of alarm unit, when lithium battery is when in an abnormal state, control chip exports low
Level signal can allow Light-emitting diode LED 1 to shine, and allow user that can be in abnormality learning lithium battery at the first time, just
Relevant abnormalities treatment measures are made with prestissimo in user.
Only several embodiments of the present invention are expressed for embodiment described above, and the description thereof is more specific and detailed, but
It cannot be construed as a limitation to the scope of the present invention.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to of the invention
Protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of charging and discharging lithium battery circuit characterized by comprising
Chip is controlled, the test side of the control chip with lithium battery for connecting；
Constant current unit, the first input end of the constant current unit are connect with the first output end of the control chip, the constant current
Second input terminal of unit and the cathode of lithium battery connect；
Constant pressure unit, the first input end of the constant pressure unit and the cathode of lithium battery connect, and the second of the constant pressure unit is defeated
The anode for entering end and lithium battery connects, and the reference edge of the constant pressure unit is connect with the second output terminal of the control chip；
Mode selecting unit, the first input end of the mode selecting unit are connect with external positive voltage source, the model selection
Second input terminal of unit is connect with external negative supply, the third input terminal of the mode selecting unit and the constant pressure unit
Output end connection, the 4th input terminal of the mode selecting unit connect with the output end of the constant current unit；
Charge/discharge unit, the charge/discharge unit include resistance 4R3, triode 4Q5, triode 4VT3, triode 4Q6, three poles
Pipe 4VT4, diode 4D2 and diode 4D3, resistance 4R3 described in the base series of the triode 4Q5 is as the charge and discharge
The first input end of unit is connect with the output end of the constant current unit, the collector of the triode 4Q5 and external positive piezoelectricity
Source connection, the base stage of the triode 4VT3 are connect with the emitter of the triode 4Q5, the collector of the triode 4VT3
It is connect with the collector of the triode 4Q5, output end of the emitter of the triode 4VT3 as the charge/discharge unit
It is connect with the anode of lithium battery, second input terminal and the mould of the base stage of the triode 4Q6 as the charge/discharge unit
The output end of formula selecting unit connects, and the emitter of the triode 4Q6 connects the resistance 4R7's and triode 4Q5
Emitter connection, the base stage of the triode 4VT4 are connect with the emitter of the triode 4Q6, the hair of the triode 4VT4
Emitter grounding, the collector of the triode 4VT4 are connect with the emitter of the triode 4VT3, the sun of the diode 4D2
Pole is connect with the base stage of the triode 4Q5, control signal of the cathode of the diode 4D2 as the charge/discharge unit
Respectively with the cathode of the diode 4D3 and it is described control chip control output end connect, the anode of the diode 4D3 and
The base stage of the triode 4Q6 connects；
Reverse connecting protection unit, the reverse connecting protection unit include optical coupler OP1 and resistance RA, the 1st foot string of the optical coupler OP1
Join the resistance RA to connect with external positive voltage source, the control output end of the 2nd foot of the optical coupler OP1 and the control chip
Connection, the 3rd foot of the optical coupler OP1 are connect with external negative supply, the 4th foot and the triode of the optical coupler OP1
The base stage of 4Q5 connects；And
Alarm unit, the alarm unit include Light-emitting diode LED 1, triode Q4, resistance R23, resistance R55 and diode
D4, the base stage of the triode Q4 are connect with one end of the resistance R23, and the other end of the resistance R23 is as the alarm
The first input end of unit is connect with the control output end of the cathode of the diode D4 and the control chip respectively, and described two
The plus earth of pole pipe D4, the emitter of the triode Q4 are connect with the cathode of the Light-emitting diode LED 1, described to shine
The anode of diode (LED) 1 is connect as the second input terminal of the alarm unit with external positive voltage source, the resistance R55's
One end is connect with the collector of the triode Q4, the other end ground connection of the resistance R55.
2. charging and discharging lithium battery circuit according to claim 1, which is characterized in that the constant current unit includes galvanostat
The normal phase input end series connection resistance of 4U1, resistance 4R1, resistance 4R2, resistance 4R9 and resistance 4RS1, the galvanostat 4U1
First input end of the 4R1 as the constant current unit, the inverting input terminal series connection resistance 4R2 conduct of the galvanostat 4U1
Second input terminal of the constant current unit, the output end of the galvanostat 4U1 connect the resistance 4R9 as the constant current unit
Output end, the cathode of one end of the resistance 4RS1 and battery connects, the other end ground connection of the resistance 4RS1.
3. charging and discharging lithium battery circuit according to claim 2, which is characterized in that the constant current unit further includes capacitor
4C1, resistance 4R6 and capacitor 4C2, one end of the capacitor 4C1 are connect with the normal phase input end of the galvanostat 4U1, the electricity
The other end for holding 4C1 is connect with one end of the resistance 4R6, and one end of the other end of the resistance 4R6 and the capacitor 4C2 connect
It connects, the other end of the capacitor 4C2 is connect with the output end of the galvanostat 4U1.
4. charging and discharging lithium battery circuit according to claim 3, which is characterized in that the constant current unit further includes capacitor
4C3, the capacitor 4C3 are connected in parallel with the resistance 4RS1.
5. charging and discharging lithium battery circuit according to claim 1, which is characterized in that the triode 4Q5, triode
4VT3, triode 4Q6 and triode 4VT4 are NPN triode.
6. charging and discharging lithium battery circuit according to claim 1, which is characterized in that the resistance value of the resistance RA is 1.8K
Ω。
7. charging and discharging lithium battery circuit according to claim 1, which is characterized in that the triode Q4 is PNP triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910899795.7A CN110518674B (en) | 2019-09-23 | 2019-09-23 | Lithium battery charging and discharging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910899795.7A CN110518674B (en) | 2019-09-23 | 2019-09-23 | Lithium battery charging and discharging circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110518674A true CN110518674A (en) | 2019-11-29 |
| CN110518674B CN110518674B (en) | 2024-03-26 |
Family
ID=68633314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910899795.7A Active CN110518674B (en) | 2019-09-23 | 2019-09-23 | Lithium battery charging and discharging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110518674B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082638A (en) * | 2019-12-12 | 2020-04-28 | 中国科学院上海微系统与信息技术研究所 | Voltage switcher and control method thereof |
| CN111555397A (en) * | 2020-05-21 | 2020-08-18 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during lithium battery charging |
| CN112803388A (en) * | 2021-03-19 | 2021-05-14 | 株洲中车时代电气股份有限公司 | Discharging system of energy storage device and ground discharging system of new energy traffic vehicle |
| CN113866672A (en) * | 2021-08-31 | 2021-12-31 | 深圳市普兰斯通科技有限公司 | Abnormal state alarm circuit, device and method for charger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709980A (en) * | 2012-06-07 | 2012-10-03 | 广州益维电动汽车有限公司 | Protective plate for series lithium battery pack based on battery protective chip |
| WO2015018093A1 (en) * | 2013-08-09 | 2015-02-12 | 吉瑞高新科技股份有限公司 | Charger with overvoltage and overcurrent protection and protection method therefor |
| CN109617201A (en) * | 2018-12-29 | 2019-04-12 | 厦门市科力电子有限公司 | Novel battery charger circuit |
| CN210517837U (en) * | 2019-09-23 | 2020-05-12 | 惠州市威德盛科技有限公司 | Lithium battery charging and discharging circuit |
-
2019
- 2019-09-23 CN CN201910899795.7A patent/CN110518674B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709980A (en) * | 2012-06-07 | 2012-10-03 | 广州益维电动汽车有限公司 | Protective plate for series lithium battery pack based on battery protective chip |
| WO2015018093A1 (en) * | 2013-08-09 | 2015-02-12 | 吉瑞高新科技股份有限公司 | Charger with overvoltage and overcurrent protection and protection method therefor |
| CN109617201A (en) * | 2018-12-29 | 2019-04-12 | 厦门市科力电子有限公司 | Novel battery charger circuit |
| CN210517837U (en) * | 2019-09-23 | 2020-05-12 | 惠州市威德盛科技有限公司 | Lithium battery charging and discharging circuit |
Non-Patent Citations (1)
| Title |
|---|
| 郭红英: "基于BQ2057的锂电池组充电电路设计", 机电技术, no. 06, 31 December 2012 (2012-12-31), pages 95 - 97 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082638A (en) * | 2019-12-12 | 2020-04-28 | 中国科学院上海微系统与信息技术研究所 | Voltage switcher and control method thereof |
| CN111082638B (en) * | 2019-12-12 | 2021-08-27 | 中国科学院上海微系统与信息技术研究所 | Voltage switcher and control method thereof |
| CN111555397A (en) * | 2020-05-21 | 2020-08-18 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during lithium battery charging |
| CN112803388A (en) * | 2021-03-19 | 2021-05-14 | 株洲中车时代电气股份有限公司 | Discharging system of energy storage device and ground discharging system of new energy traffic vehicle |
| WO2022193605A1 (en) * | 2021-03-19 | 2022-09-22 | 株洲中车时代电气股份有限公司 | Discharge system of energy storage device and ground discharge system of new energy vehicle |
| CN113866672A (en) * | 2021-08-31 | 2021-12-31 | 深圳市普兰斯通科技有限公司 | Abnormal state alarm circuit, device and method for charger |
| CN113866672B (en) * | 2021-08-31 | 2024-01-30 | 深圳市普兰斯通科技有限公司 | Abnormal state alarm circuit, device and method for charger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110518674B (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110518674A (en) | Charging and discharging lithium battery circuit | |
| CN104218539B (en) | The charging circuit and method that charge power supply can be prevented to be reversely connected | |
| CN104901373B (en) | Balance-type charger and method | |
| CN204144974U (en) | The protection of lithium battery and inversion system | |
| CN207753126U (en) | A kind of lithium battery management system | |
| CN207926209U (en) | Lithium battery pack charge-discharge protection circuit | |
| CN206180614U (en) | Battery management system's awakening circuit that charges | |
| CN109017425A (en) | New energy electric motor vehicle charging control circuit | |
| CN207234387U (en) | A kind of integrated form circuit of battery partial volume | |
| CN210517837U (en) | Lithium battery charging and discharging circuit | |
| CN209448466U (en) | A kind of charging circuit and charging equipment | |
| CN203368051U (en) | Charging control circuit and television | |
| CN207098596U (en) | A kind of BMS disconnection protection circuits | |
| CN203522269U (en) | Mobile power supply circuit and mobile power supply | |
| CN109245198A (en) | Battery voltage balancing circuit and power supply device | |
| CN108427057A (en) | A kind of double source method insulation leakagel volume leakage detection circuit and its insulation leakagel volume leakage detection method | |
| CN208971247U (en) | The long-range integrated monitoring device of DC power supply | |
| CN209516710U (en) | A kind of charger identification circuit of BMS lithium battery management system | |
| CN107300654A (en) | A kind of portable cable verification detector | |
| CN209709702U (en) | A kind of charging control circuit, electronic equipment | |
| CN207074242U (en) | A kind of portable cable verification detector | |
| CN202797906U (en) | Battery overcharge protection system | |
| CN108845220B (en) | Battery system ground fault detection device and method | |
| CN203674698U (en) | Protective circuit for multiple lithium batteries | |
| CN215894821U (en) | Insulation detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |