CN207426785U - A kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger - Google Patents
A kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger Download PDFInfo
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- CN207426785U CN207426785U CN201721397355.4U CN201721397355U CN207426785U CN 207426785 U CN207426785 U CN 207426785U CN 201721397355 U CN201721397355 U CN 201721397355U CN 207426785 U CN207426785 U CN 207426785U
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Abstract
The utility model discloses a kind of fully charged output terminal automatic shutdown circuitries of lithium battery pack charger, including primary charge switch power circuit 1 and secondary charge switch power circuit 2, supply lines N1 and the protective tube F2 to connect with L1 varistor RV2 in parallel, resistance R34, resistance R36, resistance R35 are connected on one end of common mode inductance LF3 in primary charge switch power circuit 1, the fully charged output terminal automatic shutdown circuitry of this lithium battery pack charger, charger charges normal at this time, when charger is charged to 42V to battery pack, operational amplifier U3 B output low levels；Operational amplifier U3 A export high level; field-effect tube Q3Q3 is turned off at this time; lithium battery group is protected not to be damaged; charger adds fully charged; reach battery or battery pack shut-off voltage, no matter battery or battery pack protection plate whether there is shut-off, and charger just voluntarily turns off; duplicate protection thus has been carried out to battery or battery pack, has achieved the purpose that protect battery or battery pack.
Description
Technical field
The utility model is related to li-ion cell protection technical fields, are specially a kind of fully charged output terminal of lithium battery pack charger
Automatic shutdown circuitry.
Background technology
At present, well known lithium battery charger all not to battery it is fully charged after, charger output automatic cut-off function, electricity
It is the input voltage that the protection board circuit of lithium battery is leaned on to automatically shut down charger after pond is fully charged, protects lithium electric with the method
Pond.The method is that can protect lithium battery under normality condition, still, is damaged once li-ion cell protection is out of control, charger is not
Shut-off output, lithium battery will overcharge, and will damage lithium battery or lithium battery is caused to burn and explode.
Utility model content
The purpose of this utility model is to provide a kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger, tools
The advantages of thering is battery or battery pack to carry out duplicate protection, reaching protection battery or battery pack, solve of the prior art ask
Topic.
To achieve the above object, the utility model provides following technical solution：A kind of lithium battery pack charger is fully charged defeated
Outlet automatic shutdown circuitry, including primary charge switch power circuit 1 and secondary charge switch power circuit 2, the primary is filled
Supply lines N1 and the protective tube F2 to connect with L1 varistor RV2 in parallel, resistance R34, resistance in electric switch power circuit 1
R36, resistance R35 are connected on one end of common mode inductance LF3, the other end shunt capacitance Y3 of common mode inductance LF3 and capacitance Y5, common mode electricity
Feel LF3 and distinguish series inductance L5 and inductance L6, inductance L5 and inductance L6 are connected on respectively on the both ends of rectifier bridge BD2, rectifier bridge
The other end ground connection of BD2, rectifier bridge BD2 also connects to be met capacitance C18 and capacitance C23 and is grounded respectively, and capacitance C18 and capacitance C23 are simultaneously
Join the parallel interface of inductance L7 and capacitance C24, inductance L7 capacitance C13, resistance R47 and the resistance also in parallel connected with resistance R38
R46 parallel resistances R40 and diode D5 are attempted by transformer T2-A, power supply control in the primary charge switch power circuit 1
The pin 1,2 and 4 of coremaking piece U7 connect capacitance C14 and resistance R3 one end ground connection it is another terminate on transformer T2-A, power supply control
On the emitter of the pin 1 capacitance C12 and triode Q5 of chip U7, the 5 and 6 parallel resistance R44 of pin of power supply control chip U7,
Capacitance C16 and capacitance C17 series resistance R49, the pin 6 of power supply control chip U7 connect the parallel interface of capacitance C15 and resistance R43
And the zener diode ZD6 of the base stage ground connection of series resistance R42 and zener diode ZD7, triode Q5, triode Q5's
The base stage of base stage and collector resistance R41 and resistance R48 in parallel, triode Q5 also connect diode D6 series resistances R39 and
Transformer T2-A.
Preferably, sources connected in parallel resistance R23, the resistance of the field-effect tube Q3 in the secondary charge switch power circuit 2
R30, the resistance R26 to connect with zener diode ZD5, resistance R22, resistance R19, resistance R18, capacitance C22, capacitance C21, capacitance
C20 and diode D9 are connected on transformer T4-B, diode D9 also connecting resistance R16, resistance R17, capacitance C19 and capacitance C19A
Parallel interface, the grid of field-effect tube Q3 connect the emitter of triode Q6 and the parallel interface of diode D4, and diode D4 also connects
The base stage of triode Q6 and the collector of triode Q8, the base stage of the base stage of triode Q6 and collector parallel resistance R1B, parallel connection
The base stage of resistance R1A and electronics such as R25, triode Q8 connect the collector of triode Q4, resistance R30 and resistance and R28's and couple
Mouthful, the emitter and resistance R28 of triode Q8 are grounded, and the base series resistor R1 of triode Q4 is connected on operational amplifier U3-A
On, drain series diode D3, battery BATT1, resistance R58, capacitance C33 and the resistance R59 of field-effect tube Q3 are connected on integrated put
In the end feet 2 of big device U5-A, the another of zener diode ZD5 terminates at adjustable precise shunt regulator U4 and operation amplifier
On device U3-C, adjustable precise shunt regulator U4 one end ground connection, adjustable precise shunt regulator U4 is another to terminate at computing
On amplifier U3-B, the other end series resistance R3 and diode D1 of operational amplifier U3-C are connected on operational amplifier U3-A, fortune
It calculating amplifier U3-C also connecting resistance R32 and is grounded, operational amplifier U3-B series diodes D7 is connected on operational amplifier U3-A,
Operational amplifier U3-B other ends series connection strip resistance R2 is simultaneously grounded.
Preferably, 3 connecting resistance R32 of end angle, resistance R60 and the resistance R57 and resistance R56 of the integrated amplifier U5-A
Parallel interface, the end angle 1 of integrated amplifier U5-A connects the end angle 2 that capacitance C31 and resistance R61 is attempted by integrated amplifier U5-A
On, the end angle 1 of integrated amplifier U5-A is gone back series diode D12 shunt regulator diodes ZD3 and is grounded, and resistance R56 parallel connections can
Mode precision shunt voltage-stablizer U6 and resistance R62 are grounded, zener diode ZD3 connect diode D11, U2-B and resistance R20's and
Connecting port, diode D11 connect the parallel interface of integrated amplifier U5-B and capacitance C30, and the end angle 5 of integrated amplifier U5-B is connected
Resistance R55 is connected on one end of resistance R56, and the end angle 6 connecting resistance R54 and resistance R53 of integrated amplifier U5-B is simultaneously grounded.
Compared with prior art, the beneficial effects of the utility model are as follows：
This opening power supply, battery pack charges in connection, and operational amplifier U3-C exports low level at this time；Operational amplifier
U3-B exports high level；Operational amplifier U3-A exports low level, and charger charges normal at this time, when charger is filled to battery pack
When electricity is to 42V, operational amplifier U3-B output low levels；Operational amplifier U3-A exports high level, at this time field-effect tube Q3Q3
Shut-off, protect lithium battery group not to be damaged, and charger adds fully charged, reaches battery or battery pack shut-off voltage, no matter electric
Pond or battery pack protection plate whether there is shut-off, and charger just voluntarily turns off, and has thus carried out duplicate protection to battery or battery pack,
Achieve the purpose that protect battery or battery pack.
Description of the drawings
Fig. 1 is the primary charge switch power circuit principle figure of the utility model；
Fig. 2 is the secondary charge switch power circuit principle figure of the utility model；
In figure：1 primary charge switch power circuit, 2 grade charge switch power circuits.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, a kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger is opened including primary charging
Powered-down source circuit 1 and secondary charge switch power circuit 2, supply lines N1 and and L1 in the primary charge switch power circuit 1
The protective tube F2 of series connection varistor RV2 in parallel, resistance R34, resistance R36, resistance R35 are connected on the one of common mode inductance LF3
End, the other end shunt capacitance Y3 of common mode inductance LF3 and capacitance Y5, common mode inductance LF3 difference series inductance L5 and inductance L6,
Inductance L5 and inductance L6 are connected on respectively on the both ends of rectifier bridge BD2, the other end of rectifier bridge BD2 ground connection, and rectifier bridge BD2 also connects point
Capacitance C18 and capacitance C23 are not met and are grounded, the parallel interface of capacitance C18 and capacitance C23 shunt inductances L7 and capacitance C24, electricity
Sense L7 capacitance C13, the resistance R47 also in parallel to connect with resistance R38 and resistance R46 parallel resistances R40 and diode D5 are attempted by
On transformer T2-A, the pin 1,2 and 4 of power supply control chip U7 meets capacitance C14 in the primary charge switch power circuit 1
With resistance R3 one end ground connection it is another terminate on transformer T2-A, the pin 1 capacitance C12 and triode Q5 of power supply control chip U7
Emitter on, 5 and 6 parallel resistance R44 of pin, the capacitance C16 of power supply control chip U7 and capacitance C17 series resistance R49, electricity
The pin 6 of source control chip U7 connects the parallel interface and series resistance R42 and zener diode ZD7 of capacitance C15 and resistance R43,
The base stage and collector of the zener diode ZD6 of the base stage ground connection of triode Q5, triode Q5 resistance R41 and resistance in parallel
The base stage of R48, triode Q5 also meet diode D6 series resistances R39 and in transformer T2-A.
Sources connected in parallel resistance R23, resistance R30 and the voltage stabilizing two of field-effect tube Q3 in secondary charge switch power circuit 2
Resistance R26, resistance R22, resistance R19, resistance R18, capacitance C22, capacitance C21, capacitance C20 and the diode of pole pipe ZD5 series connection
D9 is connected on transformer T4-B, diode D9 also connecting resistance R16, resistance R17, the parallel interface of capacitance C19 and capacitance C19A, field
The grid of effect pipe Q3 connects the emitter of triode Q6 and the parallel interface of diode D4, and diode D4 also connects the base of triode Q6
Pole and the collector of triode Q8, base stage and collector parallel resistance R1B, the parallel resistance R1A and electricity of the base stage of triode Q6
Son such as R25, the base stage of triode Q8 meet the parallel interface of the collector of triode Q4, resistance R30 and resistance R28, triode Q8
Emitter and resistance R28 be grounded, the base series resistor R1 of triode Q4 is connected on operational amplifier U3-A, field-effect tube
Drain series diode D3, battery BATT1, resistance R58, capacitance C33 and the resistance R59 of Q3 is connected on integrated amplifier U5-A's
In end feet 2, the another of zener diode ZD5 is terminated on adjustable precise shunt regulator U4 and operational amplifier U3-C, can
Mode precision shunt voltage-stablizer U4 one end is grounded, and adjustable precise shunt regulator U4 is another to terminate at operational amplifier U3-B
On, the other end series resistance R3 and diode D1 of operational amplifier U3-C are connected on operational amplifier U3-A, operational amplifier
U3-C also connecting resistance R32 are simultaneously grounded, and operational amplifier U3-B series diodes D7 is connected on operational amplifier U3-A, and computing is put
Big device U3-B other ends series connection strip resistance R2 is simultaneously grounded.
End 3 connecting resistance R32 of angle, the resistance R60 of integrated amplifier U5-A and the parallel interface of resistance R57 and resistance R56,
The end angle 1 of integrated amplifier U5-A meets capacitance C31 and resistance R61 is attempted by the end angle 2 of integrated amplifier U5-A, integrates amplification
The end angle 1 of device U5-A is gone back series diode D12 shunt regulator diodes ZD3 and is grounded, resistance R56 parallel-connection adjustable precision shunts
Voltage-stablizer U6 and resistance R62 ground connection, zener diode ZD3 connect the parallel interface of diode D11, U2-B and resistance R20, diode
D11 connects the parallel interface of integrated amplifier U5-B and capacitance C30, and the 5 series resistance R55 of end angle of integrated amplifier U5-B is connected on
One end of resistance R56, the end angle 6 connecting resistance R54 and resistance R53 of integrated amplifier U5-B are simultaneously grounded.
Operation principle：The primary part in powered-down source is that the power supply of alternating current 220V is become output to supply electricity to lithium for the direct current of 42V
Battery pack charges, and field-effect tube Q3 is the switching tube to charge to lithium battery group, and when charging normal, field-effect tube Q3 openings are filled
Electricity, when lithium battery group is charged to 42V, this pipe is automatically shut down, not output voltage, and lithium battery group is protected not to be damaged, and shut-off is former
Reason：Power supply is opened, battery pack charges in connection, and operational amplifier U3-C exports low level at this time；Operational amplifier U3-B is exported
High level；Operational amplifier U3-A exports low level, and charger charges normal at this time, when charger is charged to 42V to battery pack
When, operational amplifier U3-B output low levels；Operational amplifier U3-A exports high level, and field-effect tube Q3Q3 is turned off at this time, protects
Shield lithium battery group be not damaged, charger add it is fully charged, reach battery or battery pack shut-off voltage, no matter battery or battery
Group protection board whether there is shut-off, and charger just voluntarily turns off, and has thus carried out duplicate protection to battery or battery pack, reaches protection
The purpose of battery or battery pack.
In summary：The fully charged output terminal automatic shutdown circuitry of this lithium battery pack charger opens power supply, battery in connection
Group charges, and operational amplifier U3-C exports low level at this time；Operational amplifier U3-B exports high level；Operational amplifier U3-A is defeated
Go out low level, charger charges normal at this time.When charger is charged to 42V to battery pack, operational amplifier U3-B outputs are low
Level；Operational amplifier U3-A exports high level, and field-effect tube Q3Q3 is turned off at this time, and lithium battery group is protected not to be damaged, and charges
Device adds fully charged, reaches battery or battery pack shut-off voltage, no matter battery or battery pack protection plate whether there is shut-off, charger
It just voluntarily turns off, duplicate protection thus has been carried out to battery or battery pack, achieve the purpose that protect battery or battery pack.
While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art,
It is appreciated that in the case where not departing from the principle of the utility model and spirit can these embodiments be carried out with a variety of variations, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger, including primary charge switch power circuit (1)
With secondary charge switch power circuit (2), it is characterised in that：In primary charge switch power circuit (1) supply lines N1 and
The protective tube F2 to connect with L1 varistor RV2 in parallel, resistance R34, resistance R36, resistance R35 are connected on common mode inductance LF3's
One end, the other end shunt capacitance Y3 of common mode inductance LF3 and capacitance Y5, common mode inductance LF3 difference series inductance L5 and inductance L6,
Inductance L5 and inductance L6 are connected on respectively on the both ends of rectifier bridge BD2, the other end of rectifier bridge BD2 ground connection, and rectifier bridge BD2 also connects point
Capacitance C18 and capacitance C23 are not met and are grounded, the parallel interface of capacitance C18 and capacitance C23 shunt inductances L7 and capacitance C24, inductance
L7 capacitance C13, the resistance R47 also in parallel to connect with resistance R38 and resistance R46 parallel resistances R40 and diode D5 are attempted by change
On depressor T2-A, in primary charge switch power circuit (1) pin 1,2 and 4 of power supply control chip U7 connect capacitance C14 and
Resistance R3 one end ground connection is another to be terminated on transformer T2-A, the pin 1 capacitance C12's and triode Q5 of power supply control chip U7
On emitter, 5 and 6 parallel resistance R44 of pin, the capacitance C16 of power supply control chip U7 and capacitance C17 series resistance R49, power supply
The pin 6 of control chip U7 connects the parallel interface of capacitance C15 and resistance R43 and series resistance R42 and zener diode ZD7, and three
The base stage and collector of the zener diode ZD6 of the base stage ground connection of grade pipe Q5, triode Q5 resistance R41 and resistance in parallel
The base stage of R48, triode Q5 also meet diode D6 series resistances R39 and in transformer T2-A.
2. the fully charged output terminal automatic shutdown circuitry of a kind of lithium battery pack charger according to claim 1, feature exist
In：Sources connected in parallel resistance R23, resistance R30 and the voltage stabilizing of field-effect tube Q3 in the secondary charge switch power circuit (2)
Resistance R26, resistance R22, resistance R19, resistance R18, capacitance C22, capacitance C21, capacitance C20 and two poles of diode ZD5 series connection
Pipe D9 is connected on transformer T4-B, diode D9 also connecting resistance R16, resistance R17, the parallel interface of capacitance C19 and capacitance C19A,
The grid of field-effect tube Q3 connects the emitter of triode Q6 and the parallel interface of diode D4, and diode D4 also connects triode Q6's
The collector of base stage and triode Q8, the base stage and collector parallel resistance R1B, parallel resistance R1A of the base stage of triode Q6 and
Electronics such as R25, the base stage of triode Q8 connect the parallel interface of the collector of triode Q4, resistance R30 and resistance R28, triode
The emitter and resistance R28 of Q8 is grounded, and the base series resistor R1 of triode Q4 is connected on operational amplifier U3-A, field-effect
Drain series diode D3, battery BATT1, resistance R58, capacitance C33 and the resistance R59 of pipe Q3 is connected on integrated amplifier U5-A's
In end feet 2, the another of zener diode ZD5 is terminated on adjustable precise shunt regulator U4 and operational amplifier U3-C, can
Mode precision shunt voltage-stablizer U4 one end is grounded, and adjustable precise shunt regulator U4 is another to terminate at operational amplifier U3-B
On, the other end series resistance R3 and diode D1 of operational amplifier U3-C are connected on operational amplifier U3-A, operational amplifier U3-
C also connecting resistance R32 are simultaneously grounded, and operational amplifier U3-B series diodes D7 is connected on operational amplifier U3-A, operational amplifier
U3-B other ends series connection strip resistance R2 is simultaneously grounded.
3. the fully charged output terminal automatic shutdown circuitry of a kind of lithium battery pack charger according to claim 2, feature exist
In：End 3 connecting resistance R32 of angle, the resistance R60 of the integrated amplifier U5-A and the parallel interface of resistance R57 and resistance R56, collection
Capacitance C31 is met into the end angle 1 of amplifier U5-A and resistance R61 is attempted by the end angle 2 of integrated amplifier U5-A, integrated amplifier
The end angle 1 of U5-A is gone back series diode D12 shunt regulator diodes ZD3 and is grounded, and resistance R56 parallel-connection adjustable precision shunts are steady
Depressor U6 and resistance R62 ground connection, zener diode ZD3 connect the parallel interface of diode D11, U2-B and resistance R20, diode
D11 connects the parallel interface of integrated amplifier U5-B and capacitance C30, and the 5 series resistance R55 of end angle of integrated amplifier U5-B is connected on electricity
One end of R56 is hindered, the end angle 6 connecting resistance R54 and resistance R53 of integrated amplifier U5-B is simultaneously grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721397355.4U CN207426785U (en) | 2017-10-26 | 2017-10-26 | A kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721397355.4U CN207426785U (en) | 2017-10-26 | 2017-10-26 | A kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger |
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| CN207426785U true CN207426785U (en) | 2018-05-29 |
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| CN201721397355.4U Active CN207426785U (en) | 2017-10-26 | 2017-10-26 | A kind of fully charged output terminal automatic shutdown circuitry of lithium battery pack charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020024913A1 (en) * | 2018-08-01 | 2020-02-06 | 江苏美的清洁电器股份有限公司 | Battery assembly, vacuum cleaner, and charging control method and system |
-
2017
- 2017-10-26 CN CN201721397355.4U patent/CN207426785U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020024913A1 (en) * | 2018-08-01 | 2020-02-06 | 江苏美的清洁电器股份有限公司 | Battery assembly, vacuum cleaner, and charging control method and system |
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