CN206585354U - A kind of lithium battery Parallel Control circuit - Google Patents
A kind of lithium battery Parallel Control circuit Download PDFInfo
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- CN206585354U CN206585354U CN201720160419.2U CN201720160419U CN206585354U CN 206585354 U CN206585354 U CN 206585354U CN 201720160419 U CN201720160419 U CN 201720160419U CN 206585354 U CN206585354 U CN 206585354U
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Abstract
The utility model discloses a kind of lithium battery Parallel Control circuit, including, first battery and the second battery, voltage output control circuit, the first current control circuit, the second current control circuit, first voltage detection comparison circuit, second voltage detection comparison circuit and condition indication circuit.The output end of the voltage output control circuit connects the first current control circuit, the first battery and connects voltage output negative pole successively, and the output end of voltage output control circuit also connects the second current control circuit, the second battery and connects voltage output negative pole successively.The first, second battery two ends are parallel with first, second voltage detecting comparison circuit respectively.The output end of the first, second voltage detecting comparison circuit connects the input of first, second current control circuit respectively, and connects voltage output control circuit simultaneously.The utility model, which can be realized, increases the purpose of battery capacity while any two sections lithium battery is in parallel, and battery performance is damaged without any.
Description
Technical field
The utility model is related to rechargeable battery circuit, more particularly to a kind of lithium battery Parallel Control circuit.
Background technology
Current most of portable digital products provide electric energy by rechargeable battery, by single battery is provided
Limited energy, rechargeable battery is when in use, it is often necessary to which multiple cell parallels get up to be linked into circuit.But it is due to electricity
Had differences between the individual of pond, with the discharge and recharge of battery repeatedly, larger difference occurs in the voltage between each battery cell
Different, when being charged to whole battery pack, battery occurs can not be filled because remaining electric quantity is less or remaining electric quantity is more occurs
The situation that conductance causes cell damage is overshooted, the normal performance of battery pack is influenceed.
Therefore, the prior art is defective, it is necessary to improve.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided a kind of lithium battery Parallel Control circuit.
The technical solution of the utility model is as follows：A kind of lithium battery Parallel Control circuit, including, the first battery, the second electricity
Pond, voltage output control circuit, the first current control circuit, the second current control circuit, first voltage detection comparison circuit, the
Two voltage detecting comparison circuits and condition indication circuit；
First current control circuit, the first battery connect to form tie point；The second electric current road control circuit,
Second battery connects to form the second branch road；First current control circuit and the second current control circuit are respectively used to control
The charge and discharge of one battery and the second battery；The voltage output control circuit is connected with two branch circuit parallel connections respectively, voltage output control
One end connection voltage output positive pole of circuit processed；
Two branch road is respectively equipped with first voltage detection comparison circuit and second voltage detection comparison circuit, for detecting
With the voltage for comparing the first battery and the second battery two ends；
The output end of the first voltage detection comparison circuit connects the first current control circuit and voltage output control respectively
The input of circuit processed；
The output end of the second voltage detection comparison circuit connects the second current control circuit and voltage output control respectively
The input of circuit processed；
Condition indication circuit is in series between the first voltage detection comparison circuit and second voltage detection comparison circuit,
For showing the balance of voltage state between the first battery and the second battery.
Further, the voltage output control circuit includes the first FET and first resistor, first effect
Should the source electrode of pipe connect voltage output positive pole, the drain electrode of first FET is connected with two branch road one end respectively, described first
The two ends of resistance connect the drain and gate of the first FET respectively.
Further, first current control circuit includes the first triode, second resistance, 3rd resistor and the 4th electricity
Resistance, the colelctor electrode connection power supply output cathode of first triode, the emitter stage of the first triode is connecting the first battery just
The emitter stage and base stage of the first triode in parallel are distinguished in pole, the two ends of the second resistance, and the 3rd resistor is connected on first
The base stage of triode, the 4th resistor coupled in parallel is in the first transistor emitter and 3rd resistor negative pole two ends.
Further, the first voltage detection comparison circuit includes the first operational amplifier, the 5th resistance, the 6th electricity
Resistance；The second voltage detection comparison circuit includes the second operational amplifier, the 7th resistance, the 8th resistance；5th resistance
With the 6th resistant series, and the first battery two ends are connected in parallel on together, the 7th resistance and the 8th resistant series, and it is in parallel together
At the second battery two ends, the output end of output the second operational amplifier of termination of the first amplifier, the positive terminal of the first amplifier
The backward end of the second operational amplifier is also connect, the positive of the first amplifier is terminated between the 5th resistance and the 6th resistance, and first puts
The positive terminal of big device also connects the backward end of the second operational amplifier, and the operational amplifier of anti-phase termination second of the first amplifier is just
Xiang Duan, between the 7th resistance of positive termination of the second amplifier and the 8th resistance, the positive supply termination second of the first amplifier is transported
The positive power source terminal of amplifier is calculated, the negative supply of the first amplifier terminates the first GND, the negative supply termination of the second amplifier
Second GND.
Using such scheme, the utility model realizes two sections by two groups of current control circuits and voltage detecting comparison circuit
The voltage ratio of lithium battery is limited compared with the charging to two section lithium batteries.When the Voltage unbalance of two section lithium batteries, high voltage lithium
Battery will charge to low-voltage lithium battery, and the size of charging current is by triode ON degree in two groups of current control circuits
Influence.Now, the load switch in voltage output control circuit --- FET is closed so that circuit can not carry out whole group
Battery power discharge.After two save the voltage complete equipilibrium in lithium batteries, triode is fully in two groups of current control circuits, this
When two batteries it is in parallel after load can be discharged.
The utility model solves the problem of terminal user is used in parallel to lithium battery inconvenient.No matter the voltage of two batteries
Which kind of degree is difference arrive, and can be put into this simple machine, and after lamp to be instructed extinguishes, the voltage of two batteries will reach balance,
The problem of in the absence of pressure difference, it is possible to which regular picture is used, so as to accomplish that any two sections lithium battery realizes parallel connection and increases battery
The purpose of capacity, and battery performance is damaged without any.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Shown referring to Figures 1 and 2, the utility model provides a kind of lithium battery Parallel Control circuit, battery B1 and battery B2
It is connected in parallel, including, voltage output control circuit 1, the first current control circuit 2, the second current control circuit 3, first voltage
Detect comparison circuit 4, second voltage detection comparison circuit 6 and condition indication circuit 5.
The output end of the voltage output control circuit 1 is sequentially connected the first current control circuit 2 and battery B1；Second electricity
Flow control circuit 3 is connected with battery B2, and is connected in parallel on the first current control circuit 2 and the first battery two ends；First electricity
The current control circuit 3 of flow control circuit 2 and second is respectively used to control battery B1 and battery B2 charge and discharge.
Battery B1 and battery the B2 two ends are parallel with first voltage detection comparison circuit 4 and second voltage detection ratio respectively
Compared with circuit 6, for detecting the voltage with comparative cell B1 and battery B2 two ends；The first voltage detects the defeated of comparison circuit 4
Go out the input that end connects the first current control circuit 2 and voltage output control circuit 1 respectively；The second voltage detection is compared
The output end of circuit 6 connects the input of the second current control circuit 3 and voltage output control circuit 1 respectively；First electricity
Condition indication circuit 5 is in series between pressure detection comparison circuit 4 and second voltage detection comparison circuit 6, for showing battery B1
Balance of voltage state between battery B2.
Specifically, electric power output voltage initially enters FET QD, and FET QD source electrode is connecing voltage output just
Pole, FET QD drain electrode connects voltage output negative pole, the two ends of the resistance R21 connect respectively FET QD drain electrode and
Grid.
FET QD drain electrode connecting triode Q1 colelctor electrode, triode Q1 base stage connection resistance R2, resistance R1
Triode Q1 emitter stage and base stage two ends are connected in parallel on, resistance R1A is connected in parallel on triode Q1 emitter stage and resistance R2 negative pole.
Triode Q1, resistance R1, resistance R2, resistance R1A collectively form the first current control circuit 2, similarly, the second current control circuit
3 include triode Q2, resistance R11, resistance R12, resistance R11A.FET QD drain electrode is also connected with triode Q2 current collection
Pole, triode Q2 base stage connection resistance R12, resistance R11 are connected in parallel on triode Q2 emitter stage and base stage two ends, resistance
R11A is connected in parallel on triode Q2 emitter stage and resistance R12 negative pole.
Battery B1 positive poles are connected by diode D1, diode D2 with battery B2 positive poles, and resistance R3 connects with resistance R4,
And battery B1 two ends are connected in parallel on, concatenation operation amplifier OP1 in-phase end, operational amplifier between resistance R3 and resistance R4
OP1 output end is sequentially connected in series diode D3, diode D4, and concatenation operation amplifier OP2 output end.Correspondingly, resistance
R13 connects with resistance R14, and is connected in parallel on battery B2 two ends, concatenation operation amplifier between resistance R13 and resistance R14
OP2 in-phase end.Operational amplifier OP1 end of oppisite phase concatenation operation amplifier OP2 in-phase end, operational amplifier OP1's is same
Phase end is also connected with operational amplifier OP2 end of oppisite phase, operational amplifier OP1 positive power source terminal access diode D1 and diode D2
Between, operational amplifier OP1 negative supply termination battery B1 negative pole.Operational amplifier OP2 positive power source terminal also accesses two poles
Between pipe D1 and diode D2, operational amplifier OP2 negative supply termination battery B2 negative pole.
Operational amplifier OP1 output end is also sequentially connected in series resistance R7 and resistance R8, and connects battery B1 negative pole.
Effect pipe Q3 source electrode connection resistance R2 negative pole, FET Q3 grid is connected between resistance R7 and resistance R8, field-effect
Pipe Q3 drain electrode connection battery B1.FET Q3 source electrode is also sequentially connected in series resistance R5 and resistance R6, and meets FET Q3
Drain electrode.Triode Q4 colelctor electrode connecting triode Q1 base stage, triode Q4 base stage be connected on resistance R5 and resistance R6 it
Between, triode Q4 emitter stage connects battery B1 negative pole.
Accordingly, operational amplifier OP2 output end is also sequentially connected in series resistance R15 and resistance R16, and connects battery B2
Negative pole.FET Q5 source electrode connection resistance R12 negative pole, FET Q5 grid is connected on resistance R15 and resistance R16
Between, FET Q5 drain electrode connection battery B2.FET Q5 source electrode is also sequentially connected in series resistance R17 and resistance R18,
And connect FET Q5 drain electrode.Triode Q6 colelctor electrode connecting triode Q2 base stage, triode Q6 base stage is connected on electricity
Hinder between R17 and resistance R18, triode Q6 emitter stage connects battery B2 negative pole.
Triode Q4 colelctor electrode is also sequentially connected in series resistance R25, resistance R26, and connects battery B1 negative pole, FET QD
Drain electrode be sequentially connected in series resistance R22, resistance R23 and resistance R24, and connect battery B1 negative pole.FET Q7 source series
LED 1, is attempted by between resistance R22 and resistance R23, and FET Q7 grid is connected on resistance R25 and resistance
Between R26, FET Q7 drain electrode connects battery B1 negative pole.Triode Q8 colelctor electrode connects FET QD grid, three
Pole pipe Q8 base stage is connected between resistance R23 and resistance R24, and triode Q8 emitter stage connects battery B1 negative pole.
Utility model works principles illustrated is as follows：
After battery B1 and battery B2 accesses circuit, the first batteries B1 voltages are followed by by resistance R3, resistance R4 partial pressures
To operational amplifier OP1 in-phase end, OP2 end of oppisite phase is also connected to simultaneously.Similarly, the second batteries B2 passes through resistance R13, electricity
Operational amplifier OP1 end of oppisite phase is added to after resistance R14 partial pressures, while being connected to OP2 in-phase end.
For operational amplifier OP1, when in-phase end voltage is higher than anti-phase terminal voltage, i.e. the electricity at battery B1 two ends
Pressure is higher than the voltage at battery B2 two ends, and operational amplifier OP1 output end will export high level, and Ya Cha more is big, operational amplifier
The level of OP1 outputs is high Jiu more.This high level divides two-way, and level makes FET Q3 after resistance R7, resistance R8 partial pressures all the way
Conducting, and drags down triode Q1 grid potentials through resistance R2, now, triode Q1 due to resistance R1, resistance R2 presence and
Magnifying state is set to, triode Q1 conducting degree depends on its grid potential is low to arrive for what degree；Another road level is through two
Pole pipe D3, resistance R25, resistance R26 turn on FET Q7, and LED 1 are lighted, while by triode Q8
Base potential drag down, make triode Q8 close, cause FET QD grid potentials be high level, now, FET QD
Close, forbid the battery pack after parallel connection to power to the load output.LED 1 lights expression and now two is saving lithium batteries just
During charging balance, do not fill and export perhaps to load.
Now the current potential of operational amplifier OP2 end of oppisite phase is higher than in-phase end, operational amplifier OP2 output low levels, field
Effect pipe Q5 is unaffected, and battery B2 voltages turn on Q6 by resistance R11A, resistance R17, resistance R18, by triode Q2 grid
Pole level is dragged down, and makes triode Q2 fully on.So that battery B1 is charged by triode Q1, triode Q2 to B2, charging
Size of current is controlled by triode Q1 conducting degree.When battery B2 voltages are higher than battery B1 voltages, triode Q2, computing are put
Big device OP2 working conditions are just with triode Q1, operational amplifier OP1 on the contrary, realize that battery B2 charges to battery B1.
With the progress of charging, battery B1 and battery B2 pressure difference are gradually reduced, the height electricity of operational amplifier OP1 outputs
Ordinary telegram position is also gradually reduced, and when the gate-drive for being reduced to FET Q3 is opened under threshold level, FET Q3 is closed
Close.B1 voltages turn on Q4 through resistance R1A, resistance R5, resistance R6, and triode Q1 grid potentials are dragged down, make triode Q1 complete
Full conducting, another side, while the voltage reduction of operational amplifier OP1 outputs, FET Q3 exits conducting state, and luminous two
Pole pipe LED1 extinguishes, triode Q8 conductings, and the current potential of FET QD grids is dragged down, makes FET QD fully on, makes
Battery pack after parallel connection can be to load output voltage.
The utility model realizes the voltage of two section lithium batteries by two groups of current control circuits and voltage detecting comparison circuit
Compare and the charging of two section lithium batteries is limited.When the Voltage unbalance of two section lithium batteries, high-voltage lithium will be to low electricity
Pressure lithium battery is charged, and the size of charging current is influenceed by triode ON degree in two groups of current control circuits.Simultaneously
LED 1 in condition indication circuit 5 is lit, and represents that two batteries carry out the balance of voltage.Now, voltage
Load switch in output control circuit 1 --- FET is closed so that circuit can not carry out whole group battery power discharge.When
After voltage complete equipilibrium in two section lithium batteries, the LED 1 in condition indication circuit 5 extinguishes, two groups of current controls
Triode is fully in circuit, and load can be discharged after now two batteries are in parallel.
In summary, the utility model solves the problem of terminal user is used in parallel to lithium battery inconvenient.No matter two section
The voltage difference of battery can be put into this simple machine to which kind of degree, and after lamp to be instructed extinguishes, the voltage of two batteries will
Balance is reached, the problem of in the absence of pressure difference, it is possible to which regular picture is used, thus accomplish any two sections lithium battery realize it is in parallel simultaneously
Increase the purpose of battery capacity, and battery performance is damaged without any.
Preferred embodiment of the present utility model is these are only, the utility model is not limited to, it is all in this practicality
Any modifications, equivalent substitutions and improvements made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (4)
1. a kind of lithium battery Parallel Control circuit, it is characterised in that including the first battery, the second battery, voltage output control electricity
Road, the first current control circuit, the second current control circuit, first voltage detection comparison circuit, second voltage detection are more electric
Road and condition indication circuit；
First current control circuit, the first battery connect to form tie point；The second electric current road control circuit, second
Battery connects to form the second branch road；First current control circuit and the second current control circuit are respectively used to the electricity of control first
Pond and the charge and discharge of the second battery；The voltage output control circuit is connected with two branch circuit parallel connections respectively, voltage output control electricity
One end connection voltage output positive pole on road；
Two branch road is respectively equipped with first voltage detection comparison circuit and second voltage detection comparison circuit, for detecting and comparing
Compared with the first battery and the voltage at the second battery two ends；
The output end of the first voltage detection comparison circuit connects the first current control circuit and voltage output control electricity respectively
The input on road；
The output end of the second voltage detection comparison circuit connects the second current control circuit and voltage output control electricity respectively
The input on road；
Condition indication circuit is in series between the first voltage detection comparison circuit and second voltage detection comparison circuit, is used for
Show the balance of voltage state between the first battery and the second battery.
2. lithium battery Parallel Control circuit according to claim 1, it is characterised in that the voltage output control circuit bag
The first FET and first resistor are included, the source electrode of first FET connects voltage output positive pole, first field-effect
The drain electrode of pipe is connected with two branch road one end respectively, and the two ends of the first resistor connect drain electrode and the grid of the first FET respectively
Pole.
3. lithium battery Parallel Control circuit according to claim 1, it is characterised in that the first current control circuit bag
The first triode, second resistance, 3rd resistor and the 4th resistance are included, the colelctor electrode connection power supply output of first triode is just
Pole, the emitter stage of the first triode connects the positive pole of the first battery, and the first triode in parallel is distinguished at the two ends of the second resistance
Emitter stage and base stage, the 3rd resistor is connected on the base stage of the first triode, and the 4th resistor coupled in parallel is in the one or three pole
Pipe emitter stage and 3rd resistor negative pole two ends.
4. lithium battery Parallel Control circuit according to claim 1, it is characterised in that the first voltage detection is more electric
Road includes the first operational amplifier, the 5th resistance, the 6th resistance；The second voltage detection comparison circuit is put including the second computing
Big device, the 7th resistance, the 8th resistance；5th resistance and the 6th resistant series, and the first battery two ends, institute are connected in parallel on together
The 7th resistance and the 8th resistant series are stated, and are connected in parallel on the second battery two ends together, the output termination second of the first amplifier is transported
The output end of amplifier is calculated, the positive terminal of the first amplifier also connects the backward end of the second operational amplifier, and the first amplifier is just
Mutually between the 5th resistance of termination and the 6th resistance, the positive terminal of the first amplifier also connects the backward end of the second operational amplifier, the
The forward end of the operational amplifier of anti-phase termination second of one amplifier, the 7th resistance of positive termination of the second amplifier and the 8th electricity
Between resistance, the positive supply of the first amplifier terminates the positive power source terminal of the second operational amplifier, the negative supply termination of the first amplifier
First GND, the negative supply of the second amplifier terminates the second GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720160419.2U CN206585354U (en) | 2017-02-21 | 2017-02-21 | A kind of lithium battery Parallel Control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720160419.2U CN206585354U (en) | 2017-02-21 | 2017-02-21 | A kind of lithium battery Parallel Control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206585354U true CN206585354U (en) | 2017-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720160419.2U Active CN206585354U (en) | 2017-02-21 | 2017-02-21 | A kind of lithium battery Parallel Control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN206585354U (en) |
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2017
- 2017-02-21 CN CN201720160419.2U patent/CN206585354U/en active Active
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