CN108306402A - A kind of master control borad super capacitor backup power supply - Google Patents
A kind of master control borad super capacitor backup power supply Download PDFInfo
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- CN108306402A CN108306402A CN201711329548.0A CN201711329548A CN108306402A CN 108306402 A CN108306402 A CN 108306402A CN 201711329548 A CN201711329548 A CN 201711329548A CN 108306402 A CN108306402 A CN 108306402A
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a kind of in order to improve the stability and reliability of charging pile master control borad, the present invention designs a set of charging pile plate electrode product super capacitor backup power supply, the product is mainly by super capacitor, boost chip, the compositions such as switching device, entire design includes power supply circuit, charge-discharge circuit, booster circuit and status monitoring circuit, power supply circuit comes from charging pile plate electrode product itself, it is the source of super capacitor energy, charge-discharge circuit controls the charging and discharging of super capacitor, super-capacitor voltage is increased to voltage needed for board level product by booster circuit, the access of status monitoring circuit control power supply and the output of entire power supply.
Description
Technical field
The present invention relates to a kind of master control borad super capacitor backup power supplies, belong to backup power supply technical field.
Background technology
Traditional lithium battery is as circuit board backup power supply, and not only performance is poor in the environment of low temperature, but also uses the longevity
Order short, charging rate is slow, and traditional capacitor the shortcomings of there are energy density is low, and charge and discharge number is few.In previous design
In, backup power supply occupies the area of very big printed circuit board, and high-cost power management chip equally limits backup power supply
Application in the product to cost sensitivity.
The critical component of mainboard is very necessary using emergency power supply, and emergency power supply again cube it is small/light weight, capacity
Greatly, function admirable.Emergency power supply have passed through the development such as ickel-cadmium cell, Ni-H cell and lithium battery, using traditional battery as electricity
Road plate backup power supply, not only performance is poor in the environment of low temperature, but also service life is short, and charging rate is slow.And traditional electricity
The shortcomings of that there are energy densities is low for container, and charge and discharge number is few.In previous design, backup power supply occupies very big printing electricity
The area of road plate, high-cost power management chip equally limit application of the backup power supply in the product to cost sensitivity.
The fast-developing requirement to emergency power supply of the smart electronics product of current a new generation is higher and higher, and mainboard answers urgent telegram
Source is high towards energy density, power density is big, longer life expectancy, the stronger direction of environmental suitability are developed.
Charging pile is generally the high-power electrically-charging equipment discontinuously used, and the charging time for arriving several roads all the way can be provided for vehicle
Road, usually unwatched communal facility.
Mainboard standby emergency power supply, improving charging pile operation stability and safety is very important.Super capacitor
Standby emergency power supply can be with safety and stability in such a way that low cost, efficient electronic device realize power supply closed-loop control
Operation stores electric energy when the power supply of charging pile control system is normal, is in time charging in charging pile control system power failure
Stake control system provides emergency power, and information is lost after the power down of the solution prior art and product in the process of running and high pressure is logical
Road can not cut off problem, have good power supply effect, can prodigious raising charging pile reliability of operation.
How a kind of low cost is provided, and the backup power supply of high stability, compact is this field technology urgently to be resolved hurrily
Problem.
Invention content
The technology of the present invention solves the problems, such as：In order to overcome existing charging pile control system standby emergency power supply, improve
Charging pile operation stability and safety devise a set of charging pile product super capacitor backup power supply, and the product is mainly by surpassing
The compositions such as grade capacitance, boost chip, switching device.
The object of the invention is achieved by following technical solution：
A kind of master control borad super capacitor backup power supply is provided, including super capacitor, overcharge protection circuit, charge-discharge circuit,
Booster circuit and output control circuit；
The overcharge protection circuit controls the charge-discharge circuit and charges for super capacitor, and super capacitor is through charge-discharge circuit
Electric discharge, the output voltage of super capacitor is boosted to supply voltage size needed for master control borad and exported by the booster circuit, described
Output control circuit controls the output voltage for exporting the booster circuit when externally fed stops.
Preferably, overcharge protection circuit control charging circuit when the voltage of super capacitor is less than charge threshold is super
Grade capacitor charging, when the voltage of super capacitor, which is higher than, overcharges protection voltage, control charging circuit stops being super capacitor charging,
The charge threshold, which is less than, overcharges protection voltage.
Preferably, the overcharge protection circuit includes metal-oxide-semiconductor Q1, voltage comparator U1, resistance R1, resistance R2, resistance R3
It is connected in series between a burning voltage Vz and ground with resistance R4, resistance R2 and R1, resistance R2 connects voltage with the common end of R1
The negative input end of comparator U1, resistance R3 are connected between the positive input terminal of voltage comparator and output end, and resistance R4 is connected to
The positive input terminal of voltage comparator and the anode of super capacitor, the cathode ground connection of super capacitor, the positive power supply of voltage comparator U1
The output voltage V of end connection booster circuitout, the output end of the grid connection voltage comparator U1 of metal-oxide-semiconductor Q1, the leakage of metal-oxide-semiconductor Q1
Pole connects external input power Vin through diode D4 connection charging circuits, source level.
Preferably, the charge threshold VrechargeFor：
Overcharge protection voltage VoverchargeFor：
VoutFor booster circuit output voltage.
Preferably, the charging circuit includes metal-oxide-semiconductor Q4, diode D2, diode D3 and resistance R11, the leakage of metal-oxide-semiconductor Q4
Pole connects the anode of super capacitor, and the cathode ground connection of super capacitor, diode D2 and diode D3 are connected in series in metal-oxide-semiconductor Q4 grid
Between pole and ground, resistance R11 is connected between metal-oxide-semiconductor Q4 grids and source electrode, control of the metal-oxide-semiconductor Q4 source electrodes in overcharge protection circuit
Lower reception charging current.
Preferably, the booster circuit includes boost chip U3, inductance L1, capacitance C3, resistance R9, resistance R10；The electricity
Resistance R9 and resistance R10 is connected in series between the output end and ground of boost chip U3, the common end of the resistance R9 and resistance R10
Connect the output feedback end FB of boost chip U3；The output end of one end connection charge-discharge circuit of inductance L1, other end connection rise
The switch conversion pin SW of chip U3, capacitance C3 is pressed to be connected between the power input VBAT of boost chip U3 and ground, boost
The power input VBAT of the output end and boost chip U3 of the Enable Pin EN connection charge-discharge circuits of chip U3.
Preferably, the output voltage preset value Vp of boost chip U3 is：
Preferably, output control circuit exports the boosting electricity when boost chip U3 outputs are more than output and open threshold value
The output voltage on road stops the output voltage of the booster circuit when boost chip U3 outputs are less than discharge threshold.
Preferably, output control circuit, including resistance R5, R6, R7, R8, R12, voltage comparator U2, triode Q3 and
PMOS tube Q2；One end stable connection voltage Vz of resistance R5, the other end connect the negative input end of voltage comparator U2；Resistance R6 connects
It is connected between the positive input terminal and ground of voltage comparator U2；The one end resistance R7 receives the output voltage of booster circuit, and the other end connects
Connect the positive input terminal of voltage comparator U2；Resistance R8 is connected between the positive input terminal and output end of voltage comparator U2；Voltage
The output voltage V of the positive power source terminal connection booster circuit of comparator U2out, the ground level of triode Q3 is defeated with voltage comparator U2's
Outlet connects, and emitter ground connection, collector is connect with the grid grade of PMOS tube Q2, the drain electrode of PMOS tube Q2 and the output of booster circuit
End is connected, and the voltage output end of the source electrode of PMOS tube Q2 as master control borad super capacitor backup power supply, resistance R12 is connected to PMOS
Between the source electrode of pipe Q2 and the output end of booster circuit.
Preferably, threshold value V is opened in outputout_HFor：
Discharge threshold Vout_LFor：
The present invention has the following advantages that compared with prior art：
(1) present invention uses stand-by power supply of the super capacitor as processor, can be gone to MCU time enough in failure
Investigate failure and records store data.
(2) present invention prevents from overcharging to ultracapacitor design overcharge protection circuit, safeguards system safety；Overcharge protection electricity
Charge threshold is respectively set in road, ensures that the promptness of charging, setting overcharge protection voltage, prevent from overcharging
(3) present invention accomplishes low cost design requirement, without using capacitance charge and discharge managing chip and lithium battery it is contour at
This element, using super capacitor compact and at low cost, charge/discharge rates are fast, reset electricity often, are suitable for low cost, knot
Structure is compact, urgent power down endangers big power supply master control borad.
Description of the drawings
Fig. 1 is the backup power supply composite structural diagram of the present invention；
Fig. 2 is the power backup circuit schematic diagram of the present invention.
Specific implementation mode
The present invention is the super capacitor backup power supply of charging pile master control borad, and entire design includes overcharge protection circuit, fills
Circuit, super capacitor, booster circuit and output control circuit.Overcharge protection circuit, which receives, comes from charging pile plate electrode product itself
Supply voltage Vin, controls super capacitor, and the charging of charging circuit control super capacitor, booster circuit increase super-capacitor voltage
To voltage needed for board level product, output control controls the output of entire power supply.It is specific as shown in Figure 1.
(1) super capacitor is a kind of power supply between traditional capacitor and battery, with property, the velocity of discharge
Soon, capacity is big, can the huge energy of abrupt release, and charge and discharge cycles are highly suitable as standby electricity up to million times
Source provides energy in very short time when system powers off suddenly for system.Its characteristic is as follows：
A. charging rate is fast, and charging can reach 95% of its rated capacity or more in 10 seconds~10 minutes；
B. service life cycle is long, and depth charge and discharge cycles access times do not have " memory effect " up to 1~500,000 times；
C. large current discharging capability is superpower, and energy conversion efficiency is high, and process losses are small, and high current energy circulation efficiency >=
90%；
D. power density is high, up to 300W/KG-5000W/KG, is equivalent to 5~10 times of battery；
E. product raw material composition, production, use, storage and dismantling process do not pollute, are ideal green rings
Protect power supply；
F. ultralow temperature characteristics are good, and temperature range is -40 DEG C wide~and+70 DEG C；
Using super capacitor as the energy carrier of the design, the electric energy for the 5s that works for charging pile control system can be stored,
Meet charging pile control system enough and completes user information preservation, the task of cutoff high access.
(2) effect of overcharge protection circuit is to continue to charge after avoiding super capacitor charging complete, if super capacitor mistake
It fills, gently then punctures, it is heavy then explode.
Overcharge protection circuit of the present invention, including metal-oxide-semiconductor Q1, amplifier U1, resistance R1, R2, R3, R4 composition, Q1 is P-channel
Metal-oxide-semiconductor, voltage comparator U1, resistance R1, R2, R3, R4 form comparison circuit.Resistance R2 and R1 are connected in series in a burning voltage
Between Vz and ground, resistance R2 connects the negative input end of voltage comparator U1 with the common end of R1, and resistance R3 is connected to voltage and compares
Between the positive input terminal and output end of device, resistance R4 is connected to the positive input terminal of voltage comparator and the anode of super capacitor, surpasses
The cathode ground connection of grade capacitance, the output end of the grid connection voltage comparator U1 of metal-oxide-semiconductor Q1, the drain electrode of metal-oxide-semiconductor Q1 is through diode
D4 connection charging circuits, source level connect external input power Vin.Metal-oxide-semiconductor Q1 is operated on off state,
P-channel metal-oxide-semiconductor Q1's act as protection super capacitor, prevents from overcharging, and is less than 2.7V when the voltage of super capacitor is low
When, voltage comparator U1 exports high level, the Q1 conductings of P-channel metal-oxide-semiconductor, and charging current passes through P ditches by nitro spy diode D4
Road metal-oxide-semiconductor Q4 charges to super capacitor, and then when the voltage of super capacitor rises to 2.7V, voltage comparator U1 exports low electricity
It is flat, P-channel metal-oxide-semiconductor Q1 is closed, stops charging to super capacitor.When the voltage of super capacitor is less than 2.4V due to electric discharge, electricity
Pressure comparator U1 exports high level again, charges to super capacitor.
When the voltage of super capacitor is less than 2.7V, Q1 is opened, and charging current is charged by diode D4 to super capacitor；
Then when super-capacitor voltage reaches 2.7V, Q1 is closed, stops being powered；When super capacitor by load discharge to 2.4V when,
Reopen Q1.Level is exported by output control circuit needed for Q1 controls.
The effect of U1 of the present invention overcharges the break-make of Q1 in protection in order to control, can be obtained by Fig. 2, and super capacitor overcharges protection electricity
Pressure Vovercharge and to recharge voltage Vrecharge expression formulas as follows：
Vz of the present invention is 2.5V, VoutFor U3 output voltages, setting Vovercharge is 2.7V, Vrecharge 2.4V.
That is, when super-capacitor voltage is more than 2.7V, Q1 is closed, stops charging.When super-capacitor voltage is less than 2.4V, Q1, weight are opened
New charging.
(3) charge-discharge circuit is the bridge between super capacitor and power supply and load, when power supply normal power supply, by this
Circuit charges to super capacitor.
Super capacitor charging circuit and discharge circuit of the present invention are made of Q4, D2, D3, R11, the effect of this partial circuit
To limit super capacitor minimum charge, which is the sum of D2, D3 and Q4GS pin voltage, the design 1.6V.D1
For fly-wheel diode, D4 is for preventing electric current from pouring in down a chimney.
(4) output control circuit completes the state-detection and real-time control of entire standby emergency power supply, standby emergency power supply
Output and shutdown.
The design realizes the effect of comparator by the way of positive feedback, if without feedback circuit, from output shift
To input (be typically homophase input) capacitance or be coupled to the output current of ground wire (homophase input usually connects ground wire), may
Comparator circuit can be caused to become unstable.Keep high-impedance node, it will help both couplings are preferably minimized limit
Degree.To increase that one of hysteresis common and effective solution method using positive feedback, positive feedback have separation rise and under
The effect of transfer point is dropped, and therefore, after conversion operation starts, input has to pass through a very long reverse operating, just starts
It converts round about.
Output control circuit of the present invention, including resistance R5, R6, R7, R8, R12, voltage comparator U2, NPN triode Q3,
PMOS tube Q2.Voltage comparator U2, resistance R5, R6, R7, R8 form comparison circuit, and the voltage stabilizing of resistance R5 connection voltage-stabiliser tubes Q5 is defeated
Outlet, resistance R8 are connected between the positive input terminal of voltage comparator and output end, and resistance R7 is being connected to voltage comparator just
Between input terminal and the ends VOUT of boost chip U3, resistance R6 is connected between the positive input terminal and ground of voltage comparator U2.NPN
The ground level of triode Q3 is connect with the output end of voltage comparator U2, emitter ground connection, the grid cascade of collector and PMOS tube Q2
It connects, the drain electrode of PMOS tube Q2 is connected with the ends VOUT of boost chip.
When the output voltage at the ends VOUT of boost chip U3 is more than 3.26V, voltage comparator U2 exports high level, NPN
Triode output conducting, PMOS tube Q2 conductings, backup power supply output are connected with load circuit, and power supply is provided for mainboard.Due to master
Plate can cause output current excessive in subnormal voltage operation, therefore output control circuit is arranged and turns off threshold value, as boost chip U3
The output voltage at the ends VOUT when being less than 2.78V, voltage comparator U2 exports low level, NPN triode output shutdown, PMOS tube
Q2 is low, and backup power supply output is disconnected with load circuit.
The break-make for acting on Q2 in discharge circuit in order to control of U2 of the present invention, can be obtained by circuit diagram, the electric discharge of U3 outputs
High voltage thresholding Vout_HWith electric discharge low-voltage thresholding Vout_LExpression formula is as follows：
It is 3.26V, V3.3_H 2.78V that V3.3_H, which is arranged, in the present invention.That is, when booster circuit output voltage is more than 3.26V
When, open Q2, Q3, output current.When booster circuit output voltage is less than 2.78V, Q2, Q3 are closed, stops electric current output.
After power supply Vin is powered off, the negative input end voltage of U2 is that 0, U2 exports high level, and Q3 is opened, and Q2 is opened, and is realized defeated
Go out
(5) use of booster circuit can be converted to the voltage of super capacitor stablizes electricity needed for charging pile control system
The voltage of pressure, super capacitor is less than 2.7V, and charging pile control system uses 3.3V, therefore by the way of boosting.
Present invention boosting is made of integrated Boost boost chips U3, inductance L1, capacitance C3, resistance R9, resistance R10, is made
With for super-capacitor voltage is increased to board level product system voltage, the voltage of U3 outputs is：
Charging pile plate electrode product systems voltage of the present invention is mostly 3.3V, therefore it is 3.3V that U3 output voltages, which are arranged, in the design.
The present invention discharge time usually up to 20s, it is possible to provide power it is big.
Using charging pile control system standby emergency power supply of the present invention, improving charging pile operation stability and safety is
It is very necessary.
It is understood that although the present invention is as above with preferred embodiment explanation, the embodiment above is not
To limit the present invention.For any person skilled in the art, technical solution of the present invention range feelings are not being departed from
Under condition, many possible changes and modifications all are made to technical solution of the present invention using the technology contents of the disclosure above, or repair
It is changed to the equivalent embodiment of equivalent variations.Therefore, every content without departing from technical solution of the present invention, technology according to the present invention
Any simple modifications, equivalents, and modifications that essence does embodiments above still fall within technical solution of the present invention guarantor
In the range of shield.
The content that description in the present invention is not described in detail belongs to the known technology of professional and technical personnel in the field.
Claims (10)
1. a kind of master control borad super capacitor backup power supply, which is characterized in that including super capacitor, overcharge protection circuit, charge and discharge
Circuit, booster circuit and output control circuit；
The overcharge protection circuit controls the charge-discharge circuit and charges for super capacitor, and super capacitor is put through charge-discharge circuit
Electricity, the output voltage of super capacitor is boosted to supply voltage size needed for master control borad and exported by the booster circuit, described defeated
Go out control circuit and controls the output voltage for exporting the booster circuit when externally fed stops.
2. master control borad super capacitor backup power supply as described in claim 1, which is characterized in that the overcharge protection circuit is when super
Control charging circuit charges for super capacitor when the voltage of grade capacitance is less than charge threshold, is overcharged when the voltage of super capacitor is higher than
Control charging circuit stops being that super capacitor charges when protection voltage, and the charge threshold, which is less than, overcharges protection voltage.
3. master control borad super capacitor backup power supply as claimed in claim 2, which is characterized in that the overcharge protection circuit includes
Metal-oxide-semiconductor Q1, voltage comparator U1, resistance R1, resistance R2, resistance R3 and resistance R4, resistance R2 and R1 are connected in series in a stabilization
Between voltage Vz and ground, resistance R2 connects the negative input end of voltage comparator U1 with the common end of R1, and resistance R3 is connected to voltage
Between the positive input terminal and output end of comparator, resistance R4 be connected to voltage comparator positive input terminal and super capacitor just
Pole, the cathode ground connection of super capacitor, the output voltage V of the positive feeder ear connection booster circuit of voltage comparator U1out, metal-oxide-semiconductor Q1
Grid connection voltage comparator U1 output end, the drain electrode of metal-oxide-semiconductor Q1 is through diode D4 connection charging circuits, and source level connection is outside
Portion input power Vin.
4. master control borad super capacitor backup power supply as claimed in claim 3, which is characterized in that the charge threshold Vrecharge
For：
Overcharge protection voltage VoverchargeFor：
VoutFor booster circuit output voltage.
5. master control borad super capacitor backup power supply as claimed in claim 1 or 2, which is characterized in that the charging circuit includes
Metal-oxide-semiconductor Q4, diode D2, diode D3 and resistance R11, the anode of the drain electrode connection super capacitor of metal-oxide-semiconductor Q4, super capacitor
Cathode is grounded, and diode D2 and diode D3 are connected in series between metal-oxide-semiconductor Q4 grids and ground, and resistance R11 is connected to metal-oxide-semiconductor Q4
Between grid and source electrode, metal-oxide-semiconductor Q4 source electrodes receive charging current under the control of overcharge protection circuit.
6. master control borad super capacitor backup power supply as claimed in claim 1 or 2, which is characterized in that the booster circuit includes
Boost chip U3, inductance L1, capacitance C3, resistance R9, resistance R10；The resistance R9 and resistance R10 are connected in series in boost chip
Between the output end and ground of U3, the resistance R9 connects the output feedback end FB of boost chip U3 with the common end of resistance R10；Electricity
Feel the output end of one end connection charge-discharge circuit of L1, the other end connects switch conversion the pin SW, capacitance C3 of boost chip U3
It is connected between the power input VBAT of boost chip U3 and ground, the Enable Pin EN connection charge-discharge circuits of boost chip U3
The power input VBAT of output end and boost chip U3.
7. master control borad super capacitor backup power supply as claimed in claim 6, which is characterized in that the output voltage of boost chip U3
Preset value Vp is：
8. master control borad super capacitor backup power supply as claimed in claim 1 or 2, which is characterized in that output control circuit is when liter
When chip U3 outputs being pressed to be more than output unlatching threshold value, the output voltage of the booster circuit is exported, when boost chip U3 outputs are low
When discharge threshold, stop the output voltage of the booster circuit.
9. master control borad super capacitor backup power supply as claimed in claim 1 or 2, which is characterized in that output control circuit, including
Resistance R5, R6, R7, R8, R12, voltage comparator U2, triode Q3 and PMOS tube Q2；One end stable connection voltage of resistance R5
Vz, the other end connect the negative input end of voltage comparator U2；Resistance R6 is connected to the positive input terminal and ground of voltage comparator U2
Between；The one end resistance R7 receives the output voltage of booster circuit, and the other end connects the positive input terminal of voltage comparator U2；Resistance R8 connects
It is connected between the positive input terminal and output end of voltage comparator U2；The positive power source terminal of voltage comparator U2 connects the defeated of booster circuit
Go out voltage Vout, the ground level of triode Q3 connect with the output end of voltage comparator U2, emitter ground connection, collector and PMOS tube
The grid grade of Q2 connects, and the drain electrode of PMOS tube Q2 is connected with the output end of booster circuit, and the source electrode of PMOS tube Q2 is super as master control borad
The voltage output end of grade capacitance backup power supply, resistance R12 are connected between the source electrode of PMOS tube Q2 and the output end of booster circuit.
10. master control borad super capacitor backup power supply as claimed in claim 9, which is characterized in that
Threshold value V is opened in outputout_HFor：
Discharge threshold Vout_LFor：
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711329548.0A CN108306402B (en) | 2017-12-13 | 2017-12-13 | Main control board super capacitor backup power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329548.0A CN108306402B (en) | 2017-12-13 | 2017-12-13 | Main control board super capacitor backup power supply |
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| CN108306402A true CN108306402A (en) | 2018-07-20 |
| CN108306402B CN108306402B (en) | 2021-01-08 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649701A (en) * | 2019-10-28 | 2020-01-03 | 天津七一二通信广播股份有限公司 | Integrated backup power supply unit with super capacitor as energy storage core and implementation method |
| CN110797965A (en) * | 2019-10-11 | 2020-02-14 | 中国直升机设计研究所 | Electricity conversion structure and method |
| CN111130210A (en) * | 2020-01-06 | 2020-05-08 | 北京中电飞华通信有限公司 | Main and standby power supply management system |
| CN111786552A (en) * | 2020-07-15 | 2020-10-16 | 河南许继仪表有限公司 | Super capacitor-based booster circuit |
| CN112290629A (en) * | 2020-10-20 | 2021-01-29 | 四川铁集共联科技股份有限公司 | Method for improving power supply efficiency of battery through super capacitor |
| CN112583074A (en) * | 2020-12-11 | 2021-03-30 | 南方电网科学研究院有限责任公司 | Charging and discharging circuit of super capacitor |
| CN113328508A (en) * | 2021-05-13 | 2021-08-31 | 东风汽车集团股份有限公司 | Standby power supply circuit |
| CN113629849A (en) * | 2021-07-30 | 2021-11-09 | 科大智能电气技术有限公司 | Alternating current power supply and backup power supply system of energy controller and use method |
| CN118074307A (en) * | 2024-04-24 | 2024-05-24 | 南京思宇电气技术有限公司 | System and method for controlling super capacitor switching terminal power supply |
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| CN110797965A (en) * | 2019-10-11 | 2020-02-14 | 中国直升机设计研究所 | Electricity conversion structure and method |
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| CN111130210A (en) * | 2020-01-06 | 2020-05-08 | 北京中电飞华通信有限公司 | Main and standby power supply management system |
| CN111130210B (en) * | 2020-01-06 | 2023-05-23 | 北京中电飞华通信有限公司 | Main and standby power management system |
| CN111786552A (en) * | 2020-07-15 | 2020-10-16 | 河南许继仪表有限公司 | Super capacitor-based booster circuit |
| CN112290629B (en) * | 2020-10-20 | 2023-04-14 | 四川铁公铁信息技术有限公司 | Method for improving battery power supply efficiency through super capacitor |
| CN112290629A (en) * | 2020-10-20 | 2021-01-29 | 四川铁集共联科技股份有限公司 | Method for improving power supply efficiency of battery through super capacitor |
| CN112583074A (en) * | 2020-12-11 | 2021-03-30 | 南方电网科学研究院有限责任公司 | Charging and discharging circuit of super capacitor |
| CN113328508B (en) * | 2021-05-13 | 2022-04-29 | 东风汽车集团股份有限公司 | Standby power supply circuit |
| CN113328508A (en) * | 2021-05-13 | 2021-08-31 | 东风汽车集团股份有限公司 | Standby power supply circuit |
| CN113629849A (en) * | 2021-07-30 | 2021-11-09 | 科大智能电气技术有限公司 | Alternating current power supply and backup power supply system of energy controller and use method |
| CN118074307A (en) * | 2024-04-24 | 2024-05-24 | 南京思宇电气技术有限公司 | System and method for controlling super capacitor switching terminal power supply |
| CN118074307B (en) * | 2024-04-24 | 2024-07-09 | 南京思宇电气技术有限公司 | System and method for controlling super capacitor switching terminal power supply |
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