CN205986243U - Battery charge protection latch circuit and duplicate protection circuit - Google Patents
Battery charge protection latch circuit and duplicate protection circuit Download PDFInfo
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- CN205986243U CN205986243U CN201620917809.5U CN201620917809U CN205986243U CN 205986243 U CN205986243 U CN 205986243U CN 201620917809 U CN201620917809 U CN 201620917809U CN 205986243 U CN205986243 U CN 205986243U
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- 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
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Abstract
The utility model relates to a battery charge protection latch circuit and duplicate protection circuit only has the one deck protection for solving current battery management system, and the battery that leaded to when this protective layer became invalid is crossed and is filled the phenomenon, and this battery charge protection latch circuit is including being used for detecting the charged state of battery and output detection signal's detection circuitry, be connected with the charging positive end for the release circuit of release battery overcharging ability, with detection circuitry release circuit connection is used for the basis it switches on or breaks off to detect signal control release the control circuit that latchs of circuit. This battery duplicate protection circuit that charges is including MOS protection circuit and foretell charge protection latch circuit. The utility model discloses a duplicate protection circuit can be under the condition that current charge protection became invalid, and it releases to fill the energy with the mistake of charger, has blocked the charger to continue to charge to the battery, prevents that battery voltage from lasting the mistake problem of filling that risees and bring.
Description
Technical field
This utility model is related to battery management system field, more particularly, it relates to a kind of cell charge protection latches electricity
Road and dual-protection circuit.
Background technology
Existing battery management system (BMS) can carry out charge and discharge protecting to battery, protection battery will not overcharge and
Overdischarge, extends the service life of battery；It is the important component part of battery control circuit.When charging the battery, work as voltage
Reach the peak of setting, BMS charge circuit will automatically power off closing, do not continue to charge, the overcharge of shape battery pair
Protective effect；When to battery power discharge, when the under-voltage point of voltage as little as battery, BMS also can close, and so that battery is no longer discharged,
The over effect of shape battery pair.It is in series with charging control switch, when electricity given by charger in the charge circuit of existing BMS
When charging in pond, if cell voltage reaches the peak of setting, charging control switch charger and battery will be controlled to disconnect so as to
Do not continue to charge the battery, thus the additives for overcharge protection effect of shape battery pair.The additives for overcharge protection to battery for the existing BMS
There is one layer, that is, adopt charging control switch, when cell voltage reaches setting peak, control charge circuit to disconnect, make charging
Device no longer continues to charge to battery, thus protecting battery not overcharge.But, when charging control switch lost efficacy, charger is just
Can ceaselessly charge the battery always, cause battery overcharge, thus causing the temperature of battery to raise, can occur under serious conditions
Leakage, or even burning, blast.
Utility model content
The problem existing for prior art, this utility model provides a kind of cell charge protection latch cicuit and dual guarantor
Protection circuit.
This utility model solves above-mentioned technical problem and be employed technical scheme comprise that：Construct a kind of cell charge protection to latch
Circuit, including：
For detecting the charged state of battery and exporting the testing circuit of detection signal；
It is connected with charging positive terminal, for discharging the release circuit of over-charging of battery electric energy；
It is connected with described testing circuit, described release circuit, for the institute that is turned on or off is controlled according to described detection signal
State the latch control circuit of release circuit.
Preferably, described testing circuit includes voltage detecting circuit or temperature sensing circuit.
Preferably, described voltage detecting circuit include controllable accurate source of stable pressure, the first bleeder circuit, the first diode,
Two bleeder circuits, the first electric capacity and the second electric capacity；Wherein：
The first divider resistance that described first bleeder circuit includes being sequentially connected in series, the second divider resistance, the 3rd divider resistance
And the 4th divider resistance, described first divider resistance first end is connected with anode, described first divider resistance the second end
It is connected with described second divider resistance first end, the second end of described second divider resistance and the first of described 3rd divider resistance
End, the reference edge of the first end of described first electric capacity, the first end of described second electric capacity and described controllable accurate source of stable pressure connect
Connect, the second end of described 3rd divider resistance is connected with the first end of described 4th divider resistance, the second of described first electric capacity
End, the positive pole at the second end of described second electric capacity, the second end of described 4th divider resistance and described controllable accurate source of stable pressure
Connect reference ground；
Described second bleeder circuit includes the 5th divider resistance, the 6th divider resistance；The first of described 5th divider resistance
End is connected with the first end of the first divider resistance；The positive pole of described first diode is connected with the second end of described 5th divider resistance
Connect, its negative pole is connected, with the first end of described 6th divider resistance, the outfan drawing described testing circuit；Described 6th partial pressure
Second end of resistance is connected with the negative pole of described controllable accurate source of stable pressure.
Preferably, described temperature sensing circuit includes being sequentially connected in series the 7th divider resistance, the 8th divider resistance, temperature-sensitive electricity
Resistance and threeth electric capacity in parallel with described critesistor；
The first end of described 7th divider resistance is connected with the first constant voltage power supply, and the first of described 8th divider resistance
End is connected, with the second end of described 7th divider resistance, the outfan drawing described testing circuit；The of described 8th divider resistance
Two ends are connected with the first end of described critesistor, the first end of described 3rd electric capacity；Second end of described critesistor and institute
The second end stating the 3rd electric capacity connects reference ground.
Preferably, described latch control circuit include PNP type triode, NPN type triode, the first biasing resistor, second
Biasing resistor, the 3rd bleeder circuit, the first current-limiting resistance and the 4th electric capacity；
The first end of described first biasing resistor is connected with the emitter stage of described PNP type triode and anode, institute
State the base stage of PNP type triode and the second end of described first biasing resistor, the first end of described second biasing resistor and institute
The outfan stating testing circuit connects；Second end of described second biasing resistor is connected with the colelctor electrode of described NPN type triode
Draw the outfan of described latch control circuit；
Described 3rd bleeder circuit includes the 9th divider resistance, the tenth divider resistance and the 11st partial pressure being sequentially connected in series
Resistance；The first end of described 9th divider resistance is connected with the colelctor electrode of described PNP type triode, described tenth divider resistance
First end is connected with the second end of described 9th divider resistance, the second end of described tenth divider resistance and described 11st partial pressure
The first end of the first end of resistance, the first end of described first current-limiting resistance and described 4th electric capacity connects；Described 11st
Second end of divider resistance is connected reference ground with described second end of the 4th electric capacity, the emitter stage of described NPN type triode；Described
Second end of the first current-limiting resistance is connected with the base stage of described NPN type triode.
Preferably, described release circuit includes the 4th bleeder circuit, P-channel metal-oxide-semiconductor group, the 5th bleeder circuit and ground connection
Dissipating circuit；
Described P-channel metal-oxide-semiconductor group includes P-channel metal-oxide-semiconductor and the second diode；The positive pole of described second diode and institute
The drain electrode stating P-channel metal-oxide-semiconductor connects, and its negative pole is connected with the source electrode of described P-channel metal-oxide-semiconductor；
Described 4th bleeder circuit includes the 12nd divider resistance, the 13rd divider resistance and the 14th divider resistance；
The first end of described 12nd divider resistance is connected with the outfan of described latch control circuit, described 12nd divider resistance
Second end, the first end of described 13rd divider resistance are connected with the grid of described P-channel metal-oxide-semiconductor, described 14th partial pressure electricity
The first end of resistance, the second end of described 13rd divider resistance are connected with the source electrode of described P-channel metal-oxide-semiconductor, described 14th point
Second end of piezoresistance is connected with the second constant voltage power supply；
Described 5th bleeder circuit includes the 15th divider resistance, the 16th divider resistance and the 17th divider resistance；
The first end of described 15th divider resistance is connected with the drain electrode of described P-channel metal-oxide-semiconductor, and the first of described 16th divider resistance
End is connected with described second end of the 15th divider resistance, the first end of the 17th divider resistance；
Described ground connection dissipating circuit includes N-channel MOS pipe group, the first resistance for dissipation and the second resistance for dissipation；
Described N-channel MOS pipe group includes N-channel MOS pipe and the 3rd diode；The positive pole of described 3rd diode and institute
The source electrode stating N-channel MOS pipe connects, and its negative pole is connected with the drain electrode of described N-channel MOS pipe；
The grid of described N-channel MOS pipe is connected with the second end of described 17th divider resistance, described N-channel MOS pipe
Source electrode is connected reference ground, the second end of described second resistance for dissipation and described N ditch with the second end of described 16th divider resistance
The drain electrode of road metal-oxide-semiconductor connects, and the first end of described second resistance for dissipation is connected with the second end of described first resistance for dissipation；Described
The first end of the first resistance for dissipation is connected with described charging positive terminal.
Preferably, described release circuit includes the 4th bleeder circuit, P-channel metal-oxide-semiconductor group, the 5th bleeder circuit and light consumption
Scattered circuit；
Described P-channel metal-oxide-semiconductor group includes P-channel metal-oxide-semiconductor and the second diode；The positive pole of described second diode with
The drain electrode of described P-channel metal-oxide-semiconductor connects, and its negative pole is connected with the source electrode of described P-channel metal-oxide-semiconductor；
Described 4th bleeder circuit includes the 12nd divider resistance, the 13rd divider resistance and the 14th divider resistance；
The first end of described 12nd divider resistance is connected with the outfan of described latch control circuit, described 12nd divider resistance
Second end, the first end of described 13rd divider resistance are connected with the grid of described P-channel metal-oxide-semiconductor, described 14th partial pressure electricity
The first end of resistance, the second end of described 13rd divider resistance are connected with the source electrode of described P-channel metal-oxide-semiconductor, described 14th point
Second end of piezoresistance is connected with the second constant voltage power supply；
Described 5th bleeder circuit includes the 15th divider resistance, the 16th divider resistance and the 17th divider resistance；
The first end of described 15th divider resistance is connected with the drain electrode of described P-channel metal-oxide-semiconductor, and the first of described 16th divider resistance
End is connected with described second end of the 15th divider resistance, the first end of the 17th divider resistance；
Described smooth dissipating circuit includes the second NPN type triode and lamp assembly, the base stage of described second NPN type triode
It is connected with the second end of described 17th divider resistance, the emitter stage of described second NPN type triode and described 16th partial pressure
Second end of resistance connects reference ground, and the second end of described lamp assembly is connected with the colelctor electrode of described second NPN type triode, institute
The first end stating lamp assembly is connected with described charging positive pole.
Preferably, the 4th diode that is connected between described latch control circuit and described release circuit, institute are also included
The negative pole stating the 4th diode is connected with the outfan of described latch control circuit, and its positive pole is connected with described release circuit.
This utility model also provides a kind of battery charging dual-protection circuit, including MOS protection circuit and above-mentioned filling
Electric protection latch cicuit；
Described MOS protection circuit, is connected between charging positive terminal and anode, fills for disconnecting in over-charging of battery
The electric loop.
Preferably, described MOS protection circuit includes the second N-channel MOS pipe group, the 5th diode and the 5th electric capacity；
Described second N-channel MOS pipe group includes the second N-channel MOS pipe and the 6th diode；Described 6th diode
Positive pole is connected with the source electrode of described N-channel MOS pipe, and its negative pole is connected with the drain electrode of described N-channel MOS pipe, and its grid is connected with
Drive circuit；
The drain electrode of described second N-channel MOS pipe is connected with the first end of charging positive terminal and the 5th electric capacity, and described second
The source electrode of N-channel MOS pipe is connected with the second end of described 5th electric capacity and the positive pole of described 5th diode, and the described 5th
The negative pole of diode is connected with described anode.
Cell charge protection latch cicuit of the present utility model passes through to detect the charged state of battery, will in over-charging of battery
The electric energy overcharging carries out release to protect battery not overcharge.Dual-protection circuit of the present utility model on the basis of existing BMS,
Cell charge protection interlock circuit is provided, in the case that existing BMS charge protection lost efficacy charger can be overcharged energy
Discharged, blocked charger continue to battery charge, prevent cell voltage persistently raise bring overcharge problem.
Brief description
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the schematic diagram of this utility model cell charge protection latch cicuit；
Fig. 2 is the schematic diagram of this utility model dual-protection circuit；
Fig. 3 is the circuit diagram of Fig. 2 dual-protection circuit first embodiment；
Fig. 4 is the circuit diagram of Fig. 2 dual-protection circuit second embodiment；
Fig. 5 is the circuit diagram of Fig. 2 dual-protection circuit 3rd embodiment.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.
As shown in figure 1, in the schematic diagram of battery 3 charge protection latch cicuit of the present utility model, this latch cicuit bag
Include for detecting the charged state of battery 3 and exporting the testing circuit 4 of detection signal；It is connected with charging positive terminal, for discharging
Battery 3 overcharges the release circuit 6 of electric energy；Be connected with testing circuit 4, release circuit 6, for according to detection signal control conducting or
Disconnect the latch control circuit 5 of release circuit 6.
Due in battery 3 under overcharging state it may occur that battery 3 electrode input end voltage raise and battery 3 temperature
The phenomenon raising.So testing circuit 4 can be by detecting the voltage of battery 3 positive terminal and temperature the filling to battery 3 of battery 3
Electricity condition is detected, that is, testing circuit 4 may include voltage detecting circuit 4 or temperature sensing circuit 4.When testing circuit 4 does not have
When higher input voltage or battery 3 temperature is detected, in can determine whether that battery 3 charges normal, need not be protected.When detecting
When high voltage or high-temperature, can determine whether that battery 3 has overcharged, export corresponding detection signals to latch control circuit 5.
Latch control circuit 5 receives when overcharging detection signal of testing circuit 4 output, and latch control circuit 5 starts work
Make, conducting release circuit 6, and be held on the state of release circuit 6, i.e. latch mode.Release circuit 6 is defeated by charger 1
The electric energy entering is discharged.Because latch control circuit 5 is connected with battery 3 positive terminal, and it keeps latch mode to need to consume
Electric energy, battery 3 is powered to it.Battery 3 voltage constantly reduces, and when voltage is reduced to a certain degree, testing circuit 4 no longer inputs
Overcharge detection signal, latch control circuit 5 quits work, release latch mode.Charger 1 continues as battery 3 and charges, detection electricity
Detection battery 3 charged state is continued on road 4.
Release circuit 6 acts primarily as releasable for the electricity of charger 1 effect, hinders it to be that battery 3 charges.Its delivery mode
Can also convert release for electric energy for ground connection release, for example, convert electrical energy into luminous energy and discharged.
As shown in Fig. 2 in the schematic diagram of battery 3 charging dual-protection circuit of the present utility model, this circuit includes
MOS protection circuit 2 and above-mentioned charge protection latch cicuit；MOS protection circuit 2, is just being connected to charging positive terminal and battery 3
Between pole, for disconnecting charge circuit when battery 3 overcharges.
MOS protection circuit 2 plays the effect of charging control switch, and when battery 3 charges, MOS protection circuit 2 normally, fills
Electrical equipment 1 charges for battery 3.When battery 3 voltage reaches setting peak, MOS protection circuit 2 disconnects charge circuit, makes charging
Device 1 no longer to battery 3 to continue to charge, and protects battery 3 not overcharge, charge protection latch cicuit does not work.When MOS protection circuit 2
During inefficacy, MOS protection circuit 2 only plays wire effect in circuit, and now the schematic diagram of this circuit is as shown in Figure 1.Detection electricity
Battery 3 charged state is detected on road 4, and latch control circuit 5 is turned on or off according to detection information control release circuit 6.
In the circuit of dual-protection circuit first embodiment as shown in Figure 3, testing circuit 4 detects battery 3 positive terminal
Voltage, release circuit 6 is by the way of ground connection release.Specifically, the concrete annexation of each part is as follows：
MOS protection circuit, is connected between charging positive terminal and battery 3 positive pole.Specifically, MOS protection circuit 2 includes
Two N-channel MOS pipe Q202 groups, the 5th diode D201 and the 5th electric capacity C204；Second N-channel MOS pipe Q202 group inclusion
Two N-channel MOS pipe Q202 and the 6th diode D203；The positive pole of the 6th diode D203 and the source electrode of N-channel MOS pipe Q602
Connect, its negative pole is connected with the drain electrode of N-channel MOS pipe Q602, and its grid is connected with drive circuit；Second N-channel MOS pipe Q202
Drain electrode be connected with the first end of charging positive terminal and the 5th electric capacity C204, the source electrode and the 5th of the second N-channel MOS pipe Q202
Positive pole connection, the negative pole of the 5th diode D201 and battery 3 positive pole of second end of electric capacity C204 and the 5th diode D201
Connect.
The input of voltage detecting circuit 4 is connected between battery 3 positive pole and the outfan of MOS protection circuit 2.Specifically
, voltage detecting circuit 4 includes controllable accurate source of stable pressure TL431, the first bleeder circuit, the first diode D401, the second partial pressure
Circuit, the first electric capacity C401 and the second electric capacity C402；Wherein：
The first divider resistance R401 that first bleeder circuit includes being sequentially connected in series, the second divider resistance R402, the 3rd partial pressure
Resistance R403 and the 4th divider resistance R404, the first divider resistance R401 first end is connected with battery 3 positive pole, the first partial pressure electricity
Resistance R401 second end is connected with the second divider resistance R402 first end, and second end of the second divider resistance R402 is electric with the 3rd partial pressure
The first end of resistance R403, the first end of the first electric capacity C401, the first end of the second electric capacity C402 and controllable accurate source of stable pressure
The reference edge of TL431 connects, and second end of the 3rd divider resistance R403 is connected with the first end of the 4th divider resistance R404, and first
Second end of electric capacity C401, second end of the second electric capacity C402, second end of the 4th divider resistance R404 and controllable accurate are steady
The positive pole of potential source TL431 connects reference ground；Second bleeder circuit includes the 5th divider resistance R405, the 6th divider resistance R406；
The first end of the 5th divider resistance R405 is connected with the first end of the first divider resistance R401；The positive pole of the first diode D401 with
Second end of the 5th divider resistance R405 connects, and its negative pole is connected extraction testing circuit with the first end of the 6th divider resistance R406
4 outfan；Second end of the 6th divider resistance R406 is connected with the negative pole of controllable accurate source of stable pressure TL431.
Latch control circuit 5 include PNP type triode Q501, NPN type triode Q502, the first biasing resistor R501,
Two biasing resistor R502, the 3rd bleeder circuit, the first current-limiting resistance R506 and the 4th electric capacity C501；
The first end of the first biasing resistor R501 is connected with the emitter stage of PNP type triode Q501 and battery 3 positive pole,
Second end of the base stage of PNP type triode Q501 and the first biasing resistor R501, the first end of the second biasing resistor R502 and
The outfan of testing circuit 4 connects；Second end of the second biasing resistor R502 is connected with the colelctor electrode of NPN type triode Q502 draws
Go out the outfan of latch control circuit 5；
3rd bleeder circuit includes the 9th divider resistance R503, the tenth divider resistance R504 and the 11st being sequentially connected in series
Divider resistance R505；The first end of the 9th divider resistance R503 is connected with the colelctor electrode of PNP type triode Q501, the tenth point of piezoelectricity
The first end of resistance R504 is connected with second end of the 9th divider resistance R503, second end and the 11st of the tenth divider resistance R504
The first end of the first end of divider resistance R505, the first end of the first current-limiting resistance R506 and the 4th electric capacity C501 connects；The
Second end of 11 divider resistance R505 is connected ginseng with second end of the 4th electric capacity C501, the emitter stage of NPN type triode Q502
Examine ground；Second end of the first current-limiting resistance R506 is connected with the base stage of NPN type triode Q502.
It is connected with the 4th diode, the negative pole of the 4th diode is controlled with latching between latch control circuit 5 and release circuit 6
The outfan of circuit 5 processed is connected, and its positive pole is connected with release circuit 6.
Ground connection release circuit 6 includes the 4th bleeder circuit, P-channel metal-oxide-semiconductor Q601 group, the 5th bleeder circuit and ground connection consumption
Scattered circuit；P-channel metal-oxide-semiconductor Q601 group includes P-channel metal-oxide-semiconductor Q601 and the second diode D601；Second diode D601's
Positive pole is connected with the drain electrode of P-channel metal-oxide-semiconductor Q601, and its negative pole is connected with the source electrode of P-channel metal-oxide-semiconductor Q601；4th bleeder circuit
Including the 12nd divider resistance R601, the 13rd divider resistance R602 and the 14th divider resistance R603；12nd partial pressure electricity
The first end of resistance R601 is connected with the outfan of latch control circuit 5, second end of the 12nd divider resistance R601, the 13rd point
The first end of piezoresistance R602 is connected with the grid of P-channel metal-oxide-semiconductor Q601, the first end of the 14th divider resistance R603, the tenth
Second end of three divider resistance R602 is connected with the source electrode of P-channel metal-oxide-semiconductor Q601, second end of the 14th divider resistance R603 with
Second constant voltage power supply connects；Wherein, the second constant voltage power supply is 3.3V.5th bleeder circuit includes the 15th partial pressure electricity
Resistance R604, the 16th divider resistance R605 and the 17th divider resistance R606；The first end of the 15th divider resistance R604 and P
The drain electrode of channel MOS tube Q601 connects, the first end of the 16th divider resistance R605 and the second of the 15th divider resistance R604
End, the first end of the 17th divider resistance R606 connect；Ground connection dissipating circuit includes N-channel MOS pipe Q602 group, the first dissipation electricity
Resistance R608 and the second resistance for dissipation R607；N-channel MOS pipe Q602 group includes N-channel MOS pipe Q602 and the 3rd diode
D602；The positive pole of the 3rd diode D602 is connected with the source electrode of N-channel MOS pipe Q602, and its negative pole is with N-channel MOS pipe Q602's
Drain electrode connects；The grid of N-channel MOS pipe Q602 is connected with second end of the 17th divider resistance R606, N-channel MOS pipe Q602
Source electrode be connected reference ground, the second end of the second resistance for dissipation R607 and N-channel with second end of the 16th divider resistance R605
The drain electrode of metal-oxide-semiconductor Q602 connects, and the first end of the second resistance for dissipation R607 is connected with the second end of the first resistance for dissipation R608；
The first end of the first resistance for dissipation R608 is connected with charging positive terminal.
The concrete operating principle of this dual-protection circuit first embodiment is as follows：When MOS protection circuit 2 lost efficacy, i.e. the 2nd N
When channel MOS tube Q202 lost efficacy, charger 1 will unconfined charge to battery 3, thereby results in the second N-channel MOS pipe Q202
The voltage of place circuit raises, and when this magnitude of voltage is increased to certain value, testing circuit 4 can detect this high voltage and pass through the
One divider resistance R401, the second divider resistance R402, the 3rd divider resistance R403 and the 4th divider resistance R404 partial pressure, make essence
Magnitude of voltage between the reference edge of close source of stable pressure TL431 and positive pole reaches its on state threshold voltage, so that precision voltage regulator
TL431 turns on, so precision voltage regulator TL431 place line conduction, and through the 5th divider resistance R405, the 6th divider resistance
The partial pressure of R406, makes the current potential at the first diode D401 negative pole drag down, thus the base voltage of PNP type triode Q501 also by
Drag down, the emitter stage of PNP type triode Q501 is connected with the positive pole of battery 3, thus can produce certain voltage difference so that PNP
Voltage difference between the emitter stage of type audion Q501 and base stage is more than the on state threshold voltage of PNP type triode Q501, makes PNP
Type audion Q501 enters conducting state, and then makes the 9th divider resistance R503, the tenth divider resistance R504 and the 11st point
Piezoresistance R505 place circuit turn-on, by electric resistance partial pressure, makes the base voltage of NPN type triode Q502 be in certain potentials,
Again because the grounded emitter of NPN type triode Q502, the voltage between the base stage of NPN type triode Q502 and emitter stage
Difference, more than the amplification threshold voltage of NPN type triode Q502, makes NPN type triode Q502 enter magnifying state, and then by NPN type
The collector voltage of audion Q502 is pulled low to certain value, so that release circuit 6 is started working.Through leading of the 4th diode
Logical pressure drop and the 12nd divider resistance R601, the 13rd divider resistance R602 and the 14th divider resistance R603 partial pressure, make P
The gate-source voltage difference of channel MOS tube Q601 reaches its on state threshold voltage and turns on, but through the 15th divider resistance R604,
The partial pressure of the 16th divider resistance R605 and the 17th divider resistance R606, makes the gate-source voltage of N-channel MOS pipe Q602 poor
Reach its on state threshold voltage and turn on, thus by the charging positive terminal DC+ ground connection of charger 1, so that charger 1 energy
Release, rather than continue to charge to battery 3, protect battery 3 not overcharge.
Again because the colelctor electrode of NPN type triode Q502 is connected with the base stage of PNP type triode Q501, positive-negative-positive three
The base voltage of pole pipe Q501 is also dragged down by the current collection Very Low Potential of NPN type triode Q502, so that PNP type triode Q501
Still it is kept on, so the potential difference between the base stage of NPN type triode Q502 and emitter stage is still more than NPN type
The amplification threshold voltage of audion Q502, makes NPN type triode Q502 be continually maintained in magnifying state, thus constitutes positive-negative-positive
Mutual latch between audion Q501 and NPN type triode Q502, as long as it is achieved thereby that testing circuit 4 detects charging electricity
The too high voltages on road, will make latch control circuit 5 open, and two audions enter latch mode, so that release circuit 6 is protected
Hold working condition, charger 1 energy is discharged, does not continue to charge to battery 3, thus protect battery 3 will not overcharge.
Due to audion latch control circuit 5 power consumption, the voltage of battery 3 can slowly reduce, when its voltage be reduced to set
During fixed minimum, and through the 9th divider resistance R503, the tenth divider resistance R504 and the 11st divider resistance R505
Partial pressure, can make the base voltage of NPN type triode Q502 be less than 0.6V, i.e. the electricity of NPN type triode Q502 base stage and emitter stage
Pressure reduction is less than its on state threshold voltage, thus NPN type triode Q502 enters cut-off state, so that latch control circuit 5 is discharged, fills
Electrical equipment 1 will continue to charge to battery 3；When the voltage of battery 3 is increased to setting value again, above-mentioned protection circuit again can be such as above-mentioned
Mode executes, thus by the magnitude of voltage clamper of battery 3 it is achieved that losing efficacy in original battery 3 protection board in a safety range
In the case of, protection that battery 3 is overcharged.
Wherein, charger 1 should take CC constant current mode, and output voltage range is 3 10.5V, and, now battery 3
Control circuit can enter hiccup pattern, and then hundreds of millisecond that works upon actuation quits work several seconds, then restarts work
Hundreds of millisecond, constantly circulates.
In the circuit of dual-protection circuit second embodiment as shown in Figure 4, the first embodiment shown in Fig. 3 is carried out
Improve, make testing circuit 4 detect the temperature of battery 3, release circuit 6 is still by the way of ground connection release.Specifically, each part
Concrete annexation is as follows：
The 7th divider resistance R411 that temperature sensing circuit 4 includes being sequentially connected in series, the 8th divider resistance R412, critesistor
The PCT and threeth electric capacity C411 in parallel with critesistor PCT；The first end of the 7th divider resistance R411 and the first constant voltage are powered
Power supply connects, and the first end of the 8th divider resistance R412 is connected extraction testing circuit 4 with second end of the 7th divider resistance R411
Outfan；Second end of the 8th divider resistance R412 is connected with the first end of the first end of critesistor PCT, the 3rd electric capacity C411
Connect；Second end of critesistor PCT is connected reference ground with second end of the 3rd electric capacity C411.Wherein, the first constant voltage power supply
For 5V.
Release circuit 6 is constant with the part composition of latch control circuit 5 and connected mode, that is, identical with first embodiment.
The outfan of testing circuit 4 is connected with the base stage of latch control circuit 5PNP type audion Q501.
The concrete operating principle of this dual-protection circuit second embodiment is as follows：When semistor PCT inspection
Measure temperature too high when, resistance also can increase with temperature, thus partial pressure becomes big, so the partial pressure of the 7th divider resistance R411 becomes
Little, so that the base potential of PNP type triode Q501 drags down, make latch control circuit 5 such as above-mentioned embodiment work, enter
Latch mode is started working, and makes the colelctor electrode of NPN type triode Q502 keep electronegative potential, so that release circuit 6 works.
In the circuit of dual-protection circuit 3rd embodiment as shown in Figure 5, the second embodiment shown in Fig. 4 is changed
Enter, make release circuit 6 by the way of light release.Specifically, the concrete annexation of each part is as follows：
Release circuit 6 includes the 4th bleeder circuit, P-channel metal-oxide-semiconductor Q601 group, the 5th bleeder circuit and light dissipation electricity
Road.P-channel metal-oxide-semiconductor Q601 group includes P-channel metal-oxide-semiconductor Q601 and the second diode D601；The positive pole of the second diode D601
Drain electrode with P-channel metal-oxide-semiconductor Q601 is connected, and its negative pole is connected with the source electrode of P-channel metal-oxide-semiconductor Q601；4th bleeder circuit includes
12nd divider resistance R601, the 13rd divider resistance R602 and the 14th divider resistance R603；12nd divider resistance
The first end of R601 is connected with the outfan of latch control circuit 5, second end of the 12nd divider resistance R601, the 13rd point
The first end of piezoresistance R602 is connected with the grid of P-channel metal-oxide-semiconductor Q601, the first end of the 14th divider resistance R603, the tenth
Second end of three divider resistance R602 is connected with the source electrode of P-channel metal-oxide-semiconductor Q601, second end of the 14th divider resistance R603 with
Second constant voltage power supply connects, and the second constant voltage power supply is 3.3V.5th bleeder circuit includes the 15th divider resistance
R604, the 16th divider resistance R605 and the 17th divider resistance R606；The first end of the 15th divider resistance R604 and P ditch
The drain electrode connection of road metal-oxide-semiconductor Q601, the first end of the 16th divider resistance R605 and second end of the 15th divider resistance R604,
The first end of the 17th divider resistance R606 connects；Light dissipating circuit includes the second NPN type triode Q603 and lamp assembly
L601, the base stage of the second NPN type triode Q603 is connected with second end of the 17th divider resistance R606, the second NPN type three pole
The emitter stage of pipe Q603 is connected reference ground, second end and second of lamp assembly L601 with second end of the 16th divider resistance R605
The colelctor electrode of NPN type triode Q603 connects, and the first end of lamp assembly L601 is connected with charging positive pole.
The concrete operating principle of this dual-protection circuit 3rd embodiment is as follows：When semistor PCT inspection
Measure temperature too high when, resistance also can increase with temperature, thus partial pressure becomes big, so the partial pressure of the 7th divider resistance R411 becomes
Little, so that the base potential of PNP type triode Q501 drags down, make latch control circuit 5 such as above-mentioned embodiment work, enter
Latch mode is started working, and makes the colelctor electrode of NPN type triode Q502 keep electronegative potential, so that release circuit 6 works.Through
The conduction voltage drop of the 4th diode and the 12nd divider resistance R601, the 13rd divider resistance R602 and the 14th partial pressure electricity
The partial pressure of resistance R603, makes the gate-source voltage difference of P-channel metal-oxide-semiconductor Q601 reach its on state threshold voltage and turn on, and through the
15 divider resistance R604, the 16th divider resistance R605 and the 17th divider resistance R606 partial pressure, make the second NPN type three pole
Voltage difference between the base stage of pipe Q603 and emitter stage reaches its on state threshold voltage, and the second NPN type triode Q603 turns on, from
And so that lamp assembly L601 is opened, and consume the energy of charger 1 charging positive terminal DC+ output, so that charger 1 is no longer given
Battery 3 charges, thus protects battery 3 not overcharge.
Cell charge protection interlock circuit of the present utility model passes through to detect the charged state of battery, when battery 3 overcharges
The electric energy overcharging is carried out release to protect battery not overcharge.On the basis of the existing BMS of dual-protection circuit of the present utility model,
Cell charge protection interlock circuit is provided, in the case that existing BMS charge protection lost efficacy charger can be overcharged energy
Discharged, blocked charger 1 and continued battery 3 is charged, prevent cell voltage persistently raise bring overcharge problem.
It should be understood that above example only have expressed preferred implementation of the present utility model, its description is more concrete
With detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims；It should be pointed out that for this area
Those of ordinary skill for, without departing from the concept of the premise utility, freedom can be carried out to above-mentioned technical characterstic
Combination, can also make some deformation and improve, these broadly fall into protection domain of the present utility model；Therefore, all with this practicality
Equivalents and modification that new right is done, all should belong to the covering scope of this utility model claim.
Claims (10)
1. a kind of cell charge protection latch cicuit is it is characterised in that include：
For detecting the charged state of battery and exporting the testing circuit (4) of detection signal；
It is connected with charging positive terminal, for discharging the release circuit (6) of over-charging of battery electric energy；
It is connected with described testing circuit (4), described release circuit (6), be turned on or off for being controlled according to described detection signal
The latch control circuit (5) of described release circuit (6).
2. charge protection latch cicuit according to claim 1 is it is characterised in that described testing circuit (4) includes voltage
Testing circuit or temperature sensing circuit.
3. charge protection latch cicuit according to claim 2 it is characterised in that described voltage detecting circuit include controlled
Precision voltage regulator (TL431), the first bleeder circuit, the first diode (D401), the second bleeder circuit, the first electric capacity (C401) with
And second electric capacity (C402)；Wherein：
The first divider resistance (R401) that described first bleeder circuit includes being sequentially connected in series, the second divider resistance (R402), the 3rd
Divider resistance (R403) and the 4th divider resistance (R404), described first divider resistance (R401) first end is with anode even
Connect, described first divider resistance (R401) second end is connected with described second divider resistance (R402) first end, described second point
The first end of the second end of piezoresistance (R402) and described 3rd divider resistance (R403), the first of described first electric capacity (C401)
End, the reference edge of the first end of described second electric capacity (C402) and described controllable accurate source of stable pressure (TL431) connect, and described the
Second end of three divider resistances (R403) is connected with the first end of described 4th divider resistance (R404), described first electric capacity
(C401) the second end, the second end of described second electric capacity (C402), the second end of described 4th divider resistance (R404) and
The positive pole of described controllable accurate source of stable pressure (TL431) connects reference ground；
Described second bleeder circuit includes the 5th divider resistance (R405), the 6th divider resistance (R406)；Described 5th partial pressure electricity
The first end of resistance (R405) is connected with the first end of the first divider resistance (R401)；The positive pole of described first diode (D401) with
Second end of described 5th divider resistance (R405) connects, and its negative pole is connected with the first end of described 6th divider resistance (R406)
Draw the outfan of described testing circuit (4)；Second end of described 6th divider resistance (R406) and described controllable accurate voltage stabilizing
The negative pole in source (TL431) connects.
4. charge protection latch cicuit according to claim 2 is it is characterised in that described temperature sensing circuit is included successively
Series connection the 7th divider resistance (R411), the 8th divider resistance (R412), critesistor (PCT) and with described critesistor
(PCT) the 3rd electric capacity (C411) in parallel；
The first end of described 7th divider resistance (R411) is connected with the first constant voltage power supply, described 8th divider resistance
(R412) first end is connected the output drawing described testing circuit (4) with the second end of described 7th divider resistance (R411)
End；Second end of described 8th divider resistance (R412) and the first end of described critesistor (PCT), described 3rd electric capacity
(C411) first end connects；Second end of described critesistor (PCT) is connected with the second end of described 3rd electric capacity (C411)
Reference ground.
5. the charge protection latch cicuit according to claim 3 or 4 is it is characterised in that described latch control circuit (5) wraps
Include PNP type triode (Q501), NPN type triode (Q502), the first biasing resistor (R501), the second biasing resistor (R502),
3rd bleeder circuit, the first current-limiting resistance (R506) and the 4th electric capacity (C501)；
The emitter stage of the first end of described first biasing resistor (R501) and described PNP type triode (Q501) and anode
Connect, the second end of the base stage of described PNP type triode (Q501) and described first biasing resistor (R501), described second biasing
The outfan of the first end of resistance (R502) and described testing circuit (4) connects；The of described second biasing resistor (R502)
Two ends are connected the outfan drawing described latch control circuit (5) with the colelctor electrode of described NPN type triode (Q502)；
The 9th divider resistance (R503) that described 3rd bleeder circuit includes being sequentially connected in series, the tenth divider resistance (R504) and
11st divider resistance (R505)；The first end of described 9th divider resistance (R503) and described PNP type triode (Q501)
Colelctor electrode connects, and the first end of described tenth divider resistance (R504) is connected with the second end of described 9th divider resistance (R503)
Connect, the second end of described tenth divider resistance (R504) and the first end of described 11st divider resistance (R505), described first
The first end of the first end of current-limiting resistance (R506) and described 4th electric capacity (C501) connects；Described 11st divider resistance
(R505) the second end is connected with described second end of the 4th electric capacity (C501), the emitter stage of described NPN type triode (Q502)
Reference ground；Second end of described first current-limiting resistance (R506) is connected with the base stage of described NPN type triode (Q502).
6. charge protection latch cicuit according to claim 5 is it is characterised in that described release circuit (6) includes the 4th
Bleeder circuit, P-channel metal-oxide-semiconductor (Q601) group, the 5th bleeder circuit and ground connection dissipating circuit；
Described P-channel metal-oxide-semiconductor (Q601) group includes P-channel metal-oxide-semiconductor (Q601) and the second diode (D601)；Described 2nd 2
The positive pole of pole pipe (D601) is connected with the drain electrode of described P-channel metal-oxide-semiconductor (Q601), its negative pole and described P-channel metal-oxide-semiconductor (Q601)
Source electrode connect；
Described 4th bleeder circuit includes the 12nd divider resistance (R601), the 13rd divider resistance (R602) and the 14th point
Piezoresistance (R603)；The first end of described 12nd divider resistance (R601) is connected with the outfan of described latch control circuit (5)
Connect, the second end of described 12nd divider resistance (R601), the first end of described 13rd divider resistance (R602) and described P ditch
The grid of road metal-oxide-semiconductor (Q601) connects, the first end of described 14th divider resistance (R603), described 13rd divider resistance
(R602) the second end is connected with the source electrode of described P-channel metal-oxide-semiconductor (Q601), and the second of described 14th divider resistance (R603)
End is connected with the second constant voltage power supply；
Described 5th bleeder circuit includes the 15th divider resistance (R604), the 16th divider resistance (R605) and the 17th point
Piezoresistance (R606)；The first end of described 15th divider resistance (R604) is connected with the drain electrode of described P-channel metal-oxide-semiconductor (Q601)
Connect, the first end of described 16th divider resistance (R605) and the second end of described 15th divider resistance (R604), the 17th
The first end of divider resistance (R606) connects；
Described ground connection dissipating circuit includes N-channel MOS pipe (Q602) group, the first resistance for dissipation (R608) and the second resistance for dissipation
(R607)；
Described N-channel MOS pipe (Q602) group includes N-channel MOS pipe (Q602) and the 3rd diode (D602)；Described 3rd 2
The positive pole of pole pipe (D602) is connected with the source electrode of described N-channel MOS pipe (Q602), its negative pole and described N-channel MOS pipe (Q602)
Drain electrode connect；
The grid of described N-channel MOS pipe (Q602) is connected with the second end of described 17th divider resistance (R606), described N ditch
The source electrode of road metal-oxide-semiconductor (Q602) is connected reference ground with the second end of described 16th divider resistance (R605), described second dissipation
Second end of resistance (R607) is connected with the drain electrode of described N-channel MOS pipe (Q602), and the of described second resistance for dissipation (R607)
One end is connected with the second end of described first resistance for dissipation (R608)；The first end of described first resistance for dissipation (R608) with described
Charging positive terminal connects.
7. charge protection latch cicuit according to claim 5 is it is characterised in that described release circuit (6) includes the 4th
Bleeder circuit, P-channel metal-oxide-semiconductor (Q601) group, the 5th bleeder circuit and light dissipating circuit；
Described P-channel metal-oxide-semiconductor (Q601) group includes P-channel metal-oxide-semiconductor (Q601) and the second diode (D601)；Described 2nd 2
The positive pole of pole pipe (D601) is connected with the drain electrode of described P-channel metal-oxide-semiconductor (Q601), its negative pole and described P-channel metal-oxide-semiconductor (Q601)
Source electrode connect；
Described 4th bleeder circuit includes the 12nd divider resistance (R601), the 13rd divider resistance (R602) and the 14th point
Piezoresistance (R603)；The first end of described 12nd divider resistance (R601) is connected with the outfan of described latch control circuit (5)
Connect, the second end of described 12nd divider resistance (R601), the first end of described 13rd divider resistance (R602) and described P ditch
The grid of road metal-oxide-semiconductor (Q601) connects, the first end of described 14th divider resistance (R603), described 13rd divider resistance
(R602) the second end is connected with the source electrode of described P-channel metal-oxide-semiconductor (Q601), and the second of described 14th divider resistance (R603)
End is connected with the second constant voltage power supply；
Described 5th bleeder circuit includes the 15th divider resistance (R604), the 16th divider resistance (R605) and the 17th point
Piezoresistance (R606)；The first end of described 15th divider resistance (R604) is connected with the drain electrode of described P-channel metal-oxide-semiconductor (Q601)
Connect, the first end of described 16th divider resistance (R605) and the second end of described 15th divider resistance (R604), the 17th
The first end of divider resistance (R606) connects；
Described smooth dissipating circuit includes the second NPN type triode (Q603) and lamp assembly (L601), described second NPN type three pole
The base stage of pipe (Q603) is connected with the second end of described 17th divider resistance (R606), described second NPN type triode
(Q603) emitter stage is connected reference ground with the second end of described 16th divider resistance (R605), described lamp assembly (L601)
Second end is connected with the colelctor electrode of described second NPN type triode (Q603), the first end of described lamp assembly (L601) with described
Charging positive terminal connects.
8. charge protection latch cicuit according to claim 1 is it is characterised in that also include being connected to described latch control
The 4th diode between circuit (5) and described release circuit (6), the negative pole of described 4th diode controls electricity with described latch
The outfan on road (5) is connected, and its positive pole is connected with described release circuit (6).
9. a kind of battery charging dual-protection circuit it is characterised in that include MOS protection circuit (2) and as claim 1～
Charge protection latch cicuit described in 8 any one；
Described MOS protection circuit (2), is connected between charging positive terminal and anode, fills for disconnecting in over-charging of battery
The electric loop.
10. dual-protection circuit according to claim 9 is it is characterised in that described MOS protection circuit (2) includes the 2nd N
Channel MOS tube (Q202) group, the 5th diode (D201) and the 5th electric capacity (C204)；
Described second N-channel MOS pipe (Q202) group includes the second N-channel MOS pipe (Q202) and the 6th diode (D203)；Institute
The positive pole stating the 6th diode (D203) is connected with the source electrode of described N-channel MOS pipe (Q602), its negative pole and described N-channel MOS
The drain electrode of pipe (Q602) connects, and its grid is connected with drive circuit；
The drain electrode of described second N-channel MOS pipe (Q202) is connected with the first end of charging positive terminal and the 5th electric capacity (C204),
The source electrode of described second N-channel MOS pipe (Q202) and the second end of described 5th electric capacity (C204) and described 5th diode
(D201) positive pole connects, and the negative pole of described 5th diode (D201) is connected with described anode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620917809.5U CN205986243U (en) | 2016-08-22 | 2016-08-22 | Battery charge protection latch circuit and duplicate protection circuit |
| PCT/CN2017/094330 WO2018036334A1 (en) | 2016-08-22 | 2017-07-25 | Battery charging protection latch circuit and double-protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620917809.5U CN205986243U (en) | 2016-08-22 | 2016-08-22 | Battery charge protection latch circuit and duplicate protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205986243U true CN205986243U (en) | 2017-02-22 |
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ID=58032779
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620917809.5U Active CN205986243U (en) | 2016-08-22 | 2016-08-22 | Battery charge protection latch circuit and duplicate protection circuit |
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| Country | Link |
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| CN (1) | CN205986243U (en) |
| WO (1) | WO2018036334A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018036334A1 (en) * | 2016-08-22 | 2018-03-01 | 深圳拓邦股份有限公司 | Battery charging protection latch circuit and double-protection circuit |
| CN109546612A (en) * | 2018-12-29 | 2019-03-29 | 深圳市道通智能航空技术有限公司 | A kind of protection circuit, battery and aircraft |
| CN109768597A (en) * | 2019-01-18 | 2019-05-17 | 深圳市朗科智能电气股份有限公司 | Charging protective circuit of lithium cell |
| CN110148988A (en) * | 2019-06-04 | 2019-08-20 | 深圳和而泰智能控制股份有限公司 | A kind of over-charging of battery protection circuit |
| CN112075002A (en) * | 2018-02-19 | 2020-12-11 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Discharge device, electric unit and discharge method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926354A (en) * | 1997-06-11 | 1999-07-20 | International Rectifier Corporation | Solid state relay and circuit breaker |
| CN1801565A (en) * | 2005-01-05 | 2006-07-12 | 明基电通股份有限公司 | Electronic device |
| CN202663092U (en) * | 2012-04-25 | 2013-01-09 | 吴雯雯 | Circuit protecting battery against overcharge |
| CN203747455U (en) * | 2014-01-28 | 2014-07-30 | 广东欧珀移动通信有限公司 | Overvoltage and overcurrent protection circuit and mobile terminal |
| CN205986243U (en) * | 2016-08-22 | 2017-02-22 | 深圳拓邦股份有限公司 | Battery charge protection latch circuit and duplicate protection circuit |
-
2016
- 2016-08-22 CN CN201620917809.5U patent/CN205986243U/en active Active
-
2017
- 2017-07-25 WO PCT/CN2017/094330 patent/WO2018036334A1/en active Application Filing
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018036334A1 (en) * | 2016-08-22 | 2018-03-01 | 深圳拓邦股份有限公司 | Battery charging protection latch circuit and double-protection circuit |
| CN112075002A (en) * | 2018-02-19 | 2020-12-11 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Discharge device, electric unit and discharge method |
| CN112075002B (en) * | 2018-02-19 | 2022-11-11 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Discharge device, electric unit and discharge method |
| US11554672B2 (en) | 2018-02-19 | 2023-01-17 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Discharging device, electrical unit and discharging method |
| CN109546612A (en) * | 2018-12-29 | 2019-03-29 | 深圳市道通智能航空技术有限公司 | A kind of protection circuit, battery and aircraft |
| CN109768597A (en) * | 2019-01-18 | 2019-05-17 | 深圳市朗科智能电气股份有限公司 | Charging protective circuit of lithium cell |
| CN110148988A (en) * | 2019-06-04 | 2019-08-20 | 深圳和而泰智能控制股份有限公司 | A kind of over-charging of battery protection circuit |
| CN110148988B (en) * | 2019-06-04 | 2023-06-16 | 深圳和而泰智能控制股份有限公司 | Battery overcharge protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018036334A1 (en) | 2018-03-01 |
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