CN113497479B - Super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function - Google Patents
Super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function Download PDFInfo
- Publication number
- CN113497479B CN113497479B CN202111046269.XA CN202111046269A CN113497479B CN 113497479 B CN113497479 B CN 113497479B CN 202111046269 A CN202111046269 A CN 202111046269A CN 113497479 B CN113497479 B CN 113497479B
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistor
- super capacitor
- power supply
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a super capacitor charging and discharging system with a hysteresis characteristic under-voltage protection function, which comprises a charging unit, a super capacitor module, an under-voltage protection unit, a boosting unit, a voltage-sharing protection unit and a power supply monitoring unit, wherein the charging unit is respectively connected with a main power supply and the super capacitor module, the power supply monitoring unit is respectively connected with the main power supply and the boosting unit, the voltage-sharing protection unit is connected with the super capacitor module, and the under-voltage protection unit is respectively connected with the super capacitor module and the boosting unit. According to the invention, through the under-voltage protection unit circuit system with the hysteresis characteristic, the phenomenon of false shutdown-uncontrolled startup caused by insufficient capacity of the super capacitor in the power supply process after the super capacitor is boosted is avoided, the oscillation influence during the power supply of the super capacitor is eliminated, and the reliability of the super capacitor power supply system is improved.
Description
Technical Field
The invention relates to the technical field of electric energy storage, in particular to a super capacitor charging and discharging system with a hysteresis characteristic under-voltage protection function.
Background
The charging and discharging system of the conventional super capacitor and the charging and discharging overvoltage protection method of the super capacitor are provided aiming at improving the reliability of the super capacitor, the reliability of the whole power supply system when the super capacitor is used for supplying power is not considered, and the energy use efficiency of the super capacitor is not high enough. When the super capacitor is used as a power supply, the power supply is similar to a linear power supply, but not a switching power supply. In view of this point, in most applications, the super capacitor is boosted by the DC-DC boost chip and then supplies power to the load. When the main power supply of the system is stopped (power is off), the system is boosted by the super capacitor to supply power, at the moment, the load power is stable, but the voltage at two ends of the super capacitor is continuously reduced, so the discharge current of the super capacitor is continuously increased, when the energy of the super capacitor is not enough for the load to work, the system enters a pseudo-shutdown state, the load becomes light, the boosting chip meets the working condition, the system starts up again in an uncontrolled manner, and the system is repeatedly started up for multiple times until the energy of the super capacitor is exhausted. Such false shutdown-uncontrolled startup is fatal to the digital system, and can lead to logic confusion and even fatal device damage.
The invention discloses an undervoltage protection circuit, which is disclosed in the Chinese invention application with publication number CN110943429A, and comprises a sampling circuit, a control circuit, a switch circuit and a hysteresis circuit; compared with the prior art, the voltage at two ends of the resistor R4 is used as the input of the switch circuit, and the voltage stabilizing diode D1 is connected in series with the input loop of the switch circuit, so that the loss of the undervoltage protection circuit is reduced; the collector of the PNP triode is connected in series with a diode D2 and a resistor R6 to form stable, accurate and easily-adjusted hysteresis voltage. The undervoltage protection circuit has the advantages of accurate on-off control, low loss, accurate and easily-adjusted hysteresis voltage and the like, thereby improving the overall reliability of the applied circuit.
The undervoltage protection circuit with the hysteresis characteristic is suitable for the field of switching power supplies, is used for controlling a COMP (or EN) pin of a switching power supply control IC, and is not suitable for undervoltage protection of a super capacitor. And the existing undervoltage protection circuit is complex in composition and needs an additional power supply.
Disclosure of Invention
The invention aims to solve the technical problem of providing a simple super capacitor charging and discharging system which can avoid the phenomenon of false shutdown and uncontrolled startup caused by insufficient capacity of a super capacitor in the power supply process after the power of a main power supply of the system is stopped (dropped) and the system is boosted by the super capacitor.
In order to solve the technical problems, the invention provides a super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function, which comprises a charging unit, a super capacitor module, an under-voltage protection unit, a boosting unit, a voltage-sharing protection unit and a power supply monitoring unit, wherein the charging unit is respectively connected with a main power supply and the super capacitor module, the power supply monitoring unit is respectively connected with the main power supply and the boosting unit, the voltage-sharing protection unit is connected with the super capacitor module, the under-voltage protection unit is respectively connected with the super capacitor module and the boosting unit, the under-voltage protection unit comprises a first voltage-stabilizing diode, a second voltage-stabilizing diode, a first switch tube, a second switch tube, a third switch tube, a first resistor and a second resistor, the control end of the first switch tube is connected with the anode of the first voltage-stabilizing diode and the second end of the second switch tube through the first resistor, the first end of the first switch tube is grounded, the second end of the first switch tube is connected with the control end of the third switch tube, the control end of the second switch tube is connected with the control end of the third switch tube through the second resistor, the first end of the second switch tube is connected with the cathode of the first voltage stabilizing diode, the cathode of the first voltage stabilizing diode is connected with the anode of the second voltage stabilizing diode, the cathode of the second voltage stabilizing diode is connected with the first end of the third switch tube and the anode output of the super capacitor module, and the second end of the third switch tube is connected with the input end of the boosting unit. The charging unit comprises a DC/DC power chip, a double operational amplifier, a sampling resistor, a first feedback resistor, a second feedback resistor, a third feedback resistor, a fourth feedback resistor, a first output adjusting resistor, a second output adjusting resistor and an inductor, wherein the output end of the DC/DC power chip is connected with a power VCC (voltage current collector) through the inductor, one end of the sampling resistor is connected with the power VCC, the other end of the sampling resistor is connected with the anode of the super capacitor module, one end of the first feedback resistor is connected with the sampling resistor, the other end of the first feedback resistor is connected with the reverse input end of one of the double operational amplifiers and is connected with the output end of one of the double operational amplifiers through the second feedback resistor, one end of the third feedback resistor is connected with the power VCC, and the other end of the third feedback resistor is connected with the same-direction input end of one of the double operational amplifiers and is connected with the output end of one of the double operational amplifiers through the second feedback resistor The fourth feedback resistor is grounded, one end of the first output adjusting resistor is connected with the power VCC, the other end of the first output adjusting resistor is connected with the equidirectional input ends of two operational amplifiers of the double operational amplifiers and is grounded through the second output adjusting resistor, the reverse input ends of the two operational amplifiers of the double operational amplifiers are connected with the output ends of the two operational amplifiers of the double operational amplifiers, and the output ends of the double operational amplifiers are connected with the feedback input end of the DC/DC power supply chip.
Furthermore, the undervoltage protection unit further includes a third resistor, a fourth resistor, and a first capacitor, the first switch tube is an NPN transistor, the first end of the first switch tube is an emitter of the NPN transistor, the second end of the first switch tube is a collector of the NPN transistor, the second switch tube is a PNP transistor, the first end of the second switch tube is an emitter of the PNP transistor, the second end of the second switch tube is a collector of the PNP transistor, the third switch tube is a PMOS tube, the first end of the third switch tube is a source of the PMOS tube, the second end of the third switch tube is a drain of the PMOS tube, a base of the NPN transistor is grounded through the third resistor, and the fourth resistor and the first capacitor are connected in parallel between the gate and the source of the PMOS tube.
Further, the relationship among the regulated voltage value VD2 of the first voltage regulator diode, the regulated voltage value VD3 of the second voltage regulator diode, the emitter junction turn-on voltage VV6 of the NPN transistor, the highest protection voltage VTH of the undervoltage protection unit, and the lowest protection voltage VTL of the undervoltage protection unit is as follows: VTH = VD3+ VD2+ VV6, VTL = VD3+ VV 6.
Further, the maximum protection voltage VTH of the under-voltage protection unit is 4.2V, the minimum protection voltage VTL of the under-voltage protection unit is 2.2V, the voltage stabilizing value VD2 of the first zener diode is 2V, the voltage stabilizing value VD3 of the second zener diode is 1.8V, and the emitter junction conduction voltage VV6 of the NPN triode is 0.4V.
Furthermore, the model of the DC/DC power supply chip is TPS54339, and the double operational amplifier is a single power supply operational amplifier.
Furthermore, the voltage-sharing protection unit comprises a voltage detection chip, an MOS tube and a bleeder resistor, wherein the voltage input end of the voltage detection chip is connected with the anode of the super capacitor monomer of the super capacitor module, the ground input end of the voltage detection chip is connected with the cathode of the super capacitor monomer of the super capacitor module, the output end of the voltage detection chip is connected with the grid of the MOS tube, the drain of the MOS tube is connected with the anode of the super capacitor monomer of the super capacitor module through the bleeder resistor, and the source of the MOS tube is connected with the cathode of the super capacitor monomer of the super capacitor module.
Furthermore, the threshold voltage of the voltage detection chip is 2.5V, and the hysteresis voltage is 0.05V.
Furthermore, the power monitoring unit includes first divider resistor, second divider resistor, accelerating circuit, protection diode, voltage detection chip, current-limiting resistor, accelerating bleeder circuit, MOS pipe, accelerating circuit's one end is passed through second divider resistor connects power input VIN and passes through first divider resistor ground connection, accelerating circuit's the other end is connected the voltage input of voltage detection chip, the output of voltage detection chip passes through current-limiting resistor connects the grid of MOS pipe, the drain output power down signal of MOS pipe, the source ground connection of MOS pipe, protection diode's positive pole ground connection, protection diode's negative pole is connected the voltage input of voltage detection chip, accelerating bleeder circuit with current-limiting resistor connects in parallel.
Furthermore, the accelerating circuit is formed by connecting an accelerating circuit resistor and an accelerating circuit capacitor in parallel, the accelerating discharging circuit is formed by a diode and a discharging circuit resistor, the anode of the diode is connected with one end of the discharging circuit resistor, the other end of the discharging circuit resistor is connected with the grid electrode of the MOS tube, and the cathode of the diode is connected with the output end of the voltage detection chip.
The invention has the beneficial effects that: when the voltage of the super capacitor module increases to be equal to the highest protection voltage VTH = VD3+ VD2+ VV6 of the undervoltage protection unit, the NPN triode V6 is conducted, the grid electrode of the PMOS transistor V8 is pulled down to be conducted, and the super capacitor module supplies power to the outside. When the super capacitor module supplies power to the outside, the PNP triode V7 is in a conducting state, the zener diode D2 is bypassed, and when the voltage of the super capacitor module decreases to the lowest protection voltage VTL = VD3+ VV6 of the undervoltage protection unit, the NPN triode V6 is turned off, the gate of the PMOS transistor V8 is pulled high and is turned off, and the super capacitor module stops supplying power to the outside. According to the technical scheme, the undervoltage protection unit circuit system with the hysteresis characteristic avoids the phenomenon of false shutdown and uncontrolled startup caused by insufficient capacity of the super capacitor in the power supply process after the super capacitor is boosted, eliminates the oscillation influence during power supply of the super capacitor, and improves the reliability of the super capacitor power supply system. In addition, the charging unit adopts constant-current constant-voltage charging, compared with the existing constant-voltage charging, the charging efficiency is higher, and the influence on the service life of the super capacitor is smaller; the power failure detection circuit has the advantages of acceleration, high response speed and more reliable power supply switching.
Drawings
Fig. 1 is a structural view of an embodiment of the present invention.
Fig. 2 is a circuit diagram of the undervoltage protection unit in fig. 1.
Fig. 3 is a circuit diagram of the charging unit of fig. 1.
Fig. 4 is a circuit diagram of the voltage-sharing protection unit and the super capacitor module in fig. 1.
Fig. 5 is a circuit diagram of the power monitoring unit of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As shown in fig. 1, a super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function includes a charging unit 1, a super capacitor module 2, an under-voltage protection unit 3, a voltage boosting unit 4, a voltage-sharing protection unit 5 and a power monitoring unit 6, wherein the charging unit 1 is connected to a main power source and the super capacitor module 2 respectively, the power detection unit 6 is connected to the main power source and the voltage boosting unit 4 respectively, the voltage-sharing protection unit 5 is connected to the super capacitor module 2, and the under-voltage protection unit 3 is connected to the super capacitor module 2 and the voltage boosting unit 4 respectively. The main power supply charges for super capacitor module 2 through charging unit 1, super capacitor module 2 connects boost unit 4 through undervoltage protection unit 3, boost unit 4 is as system power supply after stepping up super capacitor module output voltage, boost unit 4's enabling is controlled by power monitoring unit 6 simultaneously, and the output is forbidden when guaranteeing main system power normal work, when main system power falls, is supplied power by super capacitor again.
As shown in fig. 2, the undervoltage protection unit circuit in fig. 1 is composed of 2 zener diodes D2, D3, an NPN transistor V6, a PNP transistor V7, a PMOS transistor V8, 4 resistors R16, R17, R18, R19, and a capacitor C9, wherein a cathode of the zener diode D3 is connected to an anode output V _ CAP of the super capacitor module, an anode of the zener diode D3 is connected to a cathode of the zener diode D2, an anode of the zener diode D2 is connected to a base of the NPN transistor V6 through the resistor R16, an emitter of the PNP transistor V7 is connected to a cathode of the zener diode D2, a collector of the PNP transistor V7 is connected to an anode of the zener diode D2, a base of the PNP transistor V7 is connected to a gate of the PMOS transistor V8 through the resistor R18, a base of the NPN transistor V6 is grounded through the resistor R17, and an emitter of the PNP transistor V6 is grounded, a collector of the NPN triode V6 is connected to a gate of the PMOS transistor V8, a source of the PMOS transistor V8 is connected to a positive output V _ CAP of the super capacitor module, a drain of the PMOS transistor V8 is connected to an input end of the boost unit, and the capacitor C9 and the resistor R19 are connected in parallel between the drain and the gate of the PMOS transistor V8. The maximum protection voltage VTH of the undervoltage protection unit is 4.2V, the minimum protection voltage VTL of the undervoltage protection unit is 2.2V, the voltage stabilizing value VD3 of the voltage stabilizing diode D3 is 1.8V, the voltage stabilizing value VD2 of the voltage stabilizing diode D2 is 2V, and the emitter junction breakover voltage VV6 of the NPN triode V6 is 0.4V. When the voltage of the V _ CAP is increased to 1.8V (the voltage stabilizing value VD3 of the zener diode D3) +2V (the voltage stabilizing value VD2 of the zener diode D2) +0.4V (the emitter junction conducting voltage of the NPN triode V6) =4.2V in the boosting process, the NPN triode V6 is conducted, the gate of the PMOS transistor V8 is pulled down and conducted, and the circuit supplies power to the outside. When the circuit supplies power to the outside, the PNP triode V7 is in a conducting state, the zener diode D2 is bypassed, and when V _ CAP is reduced to 1.8V (the zener value VD3 of the zener diode D3) +0.4V (the NPN triode V6 emitter junction conducting voltage) =2.2V, the NPN triode V6 is cut off, the gate of the PMOS transistor V8 is pulled high and cut off, and the circuit stops supplying power to the outside. The undervoltage protection unit circuit realizes a hysteresis characteristic through discrete components, wherein the highest protection voltage VTH =4.2V, the lowest protection voltage VTL =2.2V, and the hysteresis voltage VHY = 2V. The oscillation influence during the power supply of the super capacitor is eliminated, and the reliability of the super capacitor power supply system is improved.
As shown in fig. 3, the circuit of the charging unit in fig. 1 includes a DC/DC power chip U1 with model number TPS54339, a dual operational amplifier D1, a sampling resistor R1, a feedback resistor R3, R6, R5, R7, an output adjusting resistor R7, an output 7, an inductor L7, a diode V7, a resistor R7, an R7, a capacitor C7, a C7, an output SW of the DC/DC power chip U7 is connected to a power source VCC through the inductor L7, the sampling resistor R7 is connected to a power source VCC, another end of the sampling resistor R7 is connected to a positive electrode of the capacitor module, one end of the feedback resistor R7 is connected to the sampling resistor R7, another end of the feedback resistor R7 is connected to an inverting input end of one operational amplifier D1 7 of the dual operational amplifiers D7 and one end of the feedback resistor R7 is connected to an output end of the operational amplifier D7, the other end of the feedback resistor R5 is connected with the D1A homodromous input end of the double operational amplifier D1 and is grounded through the feedback resistor R7, one end of the output adjusting resistor R8 is connected with a power VCC, the other end of the output adjusting resistor R8 is connected with the homodromous input end of two operational amplifiers D1B in the double operational amplifier D1 and is grounded through the output adjusting resistor R10, the reverse input end of D1B of the double operational amplifier D1 is connected with the output end of D1B of the double operational amplifier D1, the output end of D1A of the double operational amplifier D1 is connected with the anode of a diode V2, the cathode of the diode V2 is connected with the feedback input end FB of the DC/DC power supply chip 1, the output end of D1B of the double operational amplifier D1 is grounded through a resistor R11 and is connected with the feedback input end FB of the DC/DC power supply chip U1 through a resistor R9, and the pin FB 1 of the DC/DC power supply chip U1 is connected with the main power supply, C2 ground connection, concatenate resistance R2 between VIN pin and the EN pin, the EN pin passes through resistance R4 ground connection, the SS pin passes through electric capacity C4 ground connection, the VREG pin passes through electric capacity C5 ground connection, the BST pin passes through electric capacity C1 and connects inductance L1. D1A is a feedback regulation circuit, when the charging current is larger than the set value, the voltage at two ends of the sampling resistor R1 rises, the differential input increases, the FB network voltage rises, the output voltage of the DC/DC power supply chip U1 decreases, the charging current decreases, the differential input decreases, the FB network voltage decreases, and therefore constant current is achieved. D1B is a follower and plays a role in isolation. By adjusting the ratio of R3 to R6, R5 to R7, adjustment of the charging current can be achieved.
Fig. 4 shows a circuit diagram of the voltage-sharing protection unit and the super capacitor module in fig. 1, the super capacitors C6 and C8 are connected in series to form the super capacitor module, the voltage-sharing protection circuit of the super capacitor C6 is formed by the voltage detection chip V1, the MOS transistor V3, the resistors R12 and R13, the voltage-sharing protection circuit of the super capacitor C8 is formed by the voltage detection chip V4, the MOS transistor V5, the resistors R14 and R15, the resistors R12 and R13, the resistors R14 and R15 are bleeder resistors, and the capacitor C7 is a transient response capacitor. The voltage detection chips V1 and V4 are XC61CC2502, the threshold voltage is 2.5V, and the hysteresis voltage is 0.05V. Taking the voltage-sharing protection of the super capacitor C6 as an example, when the voltage at two ends of the protected super capacitor C6 is higher than 2.55V, the voltage detection chip V1 outputs a high level, the MOS transistor V3 is turned on, the protection circuit works, and the current is shunted through the bleeder resistors R12 and R13, so that the protection of the capacitor C6 is realized.
Fig. 5 shows a circuit diagram of the power monitoring unit in fig. 1, where resistors R21 and R22 are voltage dividing resistors, resistor R25 and capacitor C14 form an acceleration circuit, V11 is a protection diode, V10 is a power monitoring chip XC61CC3002, R27 is a current limiting resistor, diode V13 and resistor R29 form an acceleration bleeder circuit, and V12 is a switching MOS transistor. When the main power VIN is working normally,
when the output voltage of the power supply monitoring chip V10 is high, the MOS tube V12 is conducted, and the power failure monitoring signal PWR _ DOWN is at a low level; when the main power VIN is powered off, the voltage is reduced to meet the requirement
When the power supply monitoring chip V10 outputs low level, the MOS transistor V12 is cut off, and the power failure monitoring signal PWR _ DOWN is high level. Since VIN is a direct current output by the switching power supply, when the power is down, the input of the power supply monitoring chip V10 is rapidly reduced due to the existence of the accelerating circuit, the power supply monitoring chip V10 outputs a low level, and the MOS transistor V12 is accelerated to be turned off due to the existence of the diode V13 and the resistor R29 bleeder circuit.
The embodiment of the invention can carry out sequence adjustment, combination and deletion according to actual needs.
The embodiments describe the present invention in detail, and the specific embodiments are applied to illustrate the principle and the implementation of the present invention, and the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function comprises a charging unit, a super capacitor module, an under-voltage protection unit, a boosting unit, a voltage-sharing protection unit and a power supply monitoring unit, wherein the charging unit is respectively connected with a main power supply and the super capacitor module, the power supply monitoring unit is respectively connected with the main power supply and the boosting unit, the voltage-sharing protection unit is connected with the super capacitor module, the under-voltage protection unit is respectively connected with the super capacitor module and the boosting unit, the under-voltage protection unit comprises a first voltage-stabilizing diode, a second voltage-stabilizing diode, a first switch tube, a second switch tube, a third switch tube, a first resistor and a second resistor, the control end of the first switch tube is connected with the anode of the first voltage-stabilizing diode and the second end of the second switch tube through the first resistor, the first end of the first switching tube is grounded, the second end of the first switching tube is connected with the control end of the third switching tube, the control end of the second switching tube is connected with the control end of the third switching tube through the second resistor, the first end of the second switching tube is connected with the cathode of the first voltage-stabilizing diode, the cathode of the first voltage-stabilizing diode is connected with the anode of the second voltage-stabilizing diode, the cathode of the second voltage-stabilizing diode is connected with the first end of the third switching tube and the anode output of the super capacitor module, and the second end of the third switching tube is connected with the input end of the boosting unit; the charging unit comprises a DC/DC power supply chip, a double operational amplifier, a sampling resistor, a first feedback resistor, a second feedback resistor, a third feedback resistor, a fourth feedback resistor, a first output adjusting resistor, a second output adjusting resistor and an inductor, wherein the input end of the DC/DC power supply chip is connected with a power VIN, the output end of the DC/DC power supply chip is connected with a power VCC through the inductor, one end of the sampling resistor is connected with the power VCC, the other end of the sampling resistor is connected with the anode of the super capacitor module, one end of the first feedback resistor is connected with one end of the sampling resistor, the other end of the first feedback resistor is connected with the reverse input end of one of the double operational amplifiers and the output end of one of the double operational amplifiers through the second feedback resistor, and one end of the third feedback resistor is connected with the power VCC, the other end of the third feedback resistor is connected with the same-direction input end of one of the double operational amplifiers and is grounded through the fourth feedback resistor, one end of the first output adjusting resistor is connected with a power supply VCC, the other end of the first output adjusting resistor is connected with the same-direction input ends of two of the double operational amplifiers and is grounded through the second output adjusting resistor, the reverse input ends of the two of the double operational amplifiers are connected with the output ends of the two of the double operational amplifiers, and the output end of the double operational amplifier is connected with the feedback input end of the DC/DC power supply chip; the voltage-sharing protection unit and the super capacitor module comprise a first voltage detection chip, a second voltage detection chip, a first MOS tube, a second MOS tube, a first bleeder resistor, a second bleeder resistor, a third bleeder resistor, a fourth bleeder resistor, a first super capacitor, a second super capacitor and a transient response capacitor, wherein the cathode of the first super capacitor is connected with the anode of the second super capacitor to form the super capacitor module, the voltage input end of the first voltage detection chip is connected with the anode of the first super capacitor, the ground input end of the first voltage detection chip is connected with the cathode of the first super capacitor, the output end of the first voltage detection chip is connected with the grid of the first MOS tube, the drain of the first MOS tube is connected with the anode of the first super capacitor through a circuit formed by connecting the first bleeder resistor and the second bleeder resistor in parallel, the source of the first MOS tube is connected with the cathode of the first super capacitor, the voltage input end of the second voltage detection chip is connected with the anode of the second super capacitor, the ground input end of the second voltage detection chip is connected with the cathode of the second super capacitor, the output end of the second voltage detection chip is connected with the grid of the second MOS tube, the drain of the second MOS tube is connected with the anode of the second super capacitor through a circuit formed by the third bleeder resistor and the fourth bleeder resistor in parallel, the source of the second MOS tube is connected with the cathode of the second super capacitor, the anode of the transient response capacitor is connected with the anode of the first super capacitor, and the cathode of the transient response capacitor is connected with the cathode of the second super capacitor.
2. The supercapacitor charge-discharge system with hysteresis characteristic under-voltage protection function according to claim 1, it is characterized in that the undervoltage protection unit also comprises a third resistor, a fourth resistor and a first capacitor, the first switch tube is an NPN triode, the first end of the first switch tube is an emitting electrode of the NPN triode, the second end of the first switch tube is a collector of an NPN triode, the second switch tube is a PNP triode, the first end of the second switch tube is an emitting electrode of the PNP triode, the second end of the second switch tube is a collector electrode of the PNP triode, the third switching tube is a PMOS tube, the first end of the third switching tube is the source electrode of the PMOS tube, the second end of the third switching tube is the drain electrode of the PMOS tube, the base electrode of the NPN triode is grounded through the third resistor, the fourth resistor and the first capacitor are connected in parallel between the grid electrode and the source electrode of the PMOS tube.
3. The supercapacitor charge-discharge system with hysteresis characteristic under-voltage protection function according to claim 2, wherein the relationship among the regulated value VD2 of the first zener diode, the regulated value VD3 of the second zener diode, the emitter junction conducting voltage VV6 of the NPN transistor, the highest protection voltage VTH of the under-voltage protection unit, and the lowest protection voltage VTL of the under-voltage protection unit is as follows: VTH = VD3+ VD2+ VV6, VTL = VD3+ VV 6.
4. The charging and discharging system of the super capacitor with the hysteresis characteristic under-voltage protection function according to claim 3, wherein a maximum protection voltage VTH of the under-voltage protection unit is 4.2V, a minimum protection voltage VTL of the under-voltage protection unit is 2.2V, a voltage regulation value VD2 of the first Zener diode is 2V, a voltage regulation value VD3 of the second Zener diode is 1.8V, and an emitter junction conduction voltage VV6 of the NPN triode is 0.4V.
5. The supercapacitor charge-discharge system with hysteretic undervoltage protection function according to claim 1,
the model of the DC/DC power supply chip is TPS54339, and the double operational amplifier is a single power supply operational amplifier.
6. The supercapacitor charge-discharge system with the hysteresis characteristic under-voltage protection function according to claim 1, wherein the threshold voltage of the first voltage detection chip and the threshold voltage of the second voltage detection chip are 2.5V, and the hysteresis voltage is 0.05V.
7. The supercapacitor charge-discharge system with hysteretic undervoltage protection function according to claim 1, wherein the power monitoring unit comprises a first voltage-dividing resistor, a second voltage-dividing resistor, an acceleration circuit, a protection diode, a voltage detection chip, a current-limiting resistor, an acceleration bleeder circuit, and a MOS transistor, one end of the acceleration circuit is connected to a power input VIN through the second voltage-dividing resistor and grounded through the first voltage-dividing resistor, the other end of the acceleration circuit is connected to a voltage input of the voltage detection chip, an output of the voltage detection chip is connected to a gate of the MOS transistor through the current-limiting resistor, a drain of the MOS transistor outputs a power-down signal, a source of the MOS transistor is grounded, an anode of the protection diode is grounded, and a cathode of the protection diode is connected to a voltage input of the voltage detection chip, the accelerated bleeder circuit is connected in parallel with the current limiting resistor.
8. The supercapacitor charge-discharge system with the hysteresis characteristic under-voltage protection function according to claim 7, wherein the accelerating circuit is composed of an accelerating circuit resistor and an accelerating circuit capacitor which are connected in parallel, the accelerating leakage-discharge circuit is composed of a diode and a bleeder circuit resistor, an anode of the diode is connected with one end of the bleeder circuit resistor, the other end of the bleeder circuit resistor is connected with a gate of the MOS transistor, and a cathode of the diode is connected with the output end of the voltage detection chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111046269.XA CN113497479B (en) | 2021-09-08 | 2021-09-08 | Super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111046269.XA CN113497479B (en) | 2021-09-08 | 2021-09-08 | Super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113497479A CN113497479A (en) | 2021-10-12 |
| CN113497479B true CN113497479B (en) | 2022-02-01 |
Family
ID=77997115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111046269.XA Active CN113497479B (en) | 2021-09-08 | 2021-09-08 | Super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113497479B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114006462B (en) * | 2021-11-01 | 2024-03-22 | 浙江天正电气股份有限公司 | Power-off protection circuit, electronic equipment and power-off protection method |
| CN116073500A (en) * | 2023-04-04 | 2023-05-05 | 齐鲁工业大学(山东省科学院) | Super capacitor charge and discharge control system and control method for robot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6108182A (en) * | 1998-10-30 | 2000-08-22 | Intersil Corporation | Overcurrent sensing circuit and self adjusting blanking |
| CN1913272A (en) * | 2005-08-11 | 2007-02-14 | 艾默生网络能源系统有限公司 | Novel input undervoltage/overvoltage protection circuit |
| CN204012796U (en) * | 2014-06-20 | 2014-12-10 | 山西科泰微技术有限公司 | A kind of super capacitor charging circuit |
| CN106445057A (en) * | 2016-11-08 | 2017-02-22 | 福建星海通信科技有限公司 | Automatic and fast discharging circuit and method for monitoring power supply power down |
| CN107994622A (en) * | 2016-10-26 | 2018-05-04 | 宁德时代新能源科技股份有限公司 | Battery power supply circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799874A (en) * | 2020-08-10 | 2020-10-20 | 天津七一二通信广播股份有限公司 | Power management circuit of super capacitor and implementation method thereof |
-
2021
- 2021-09-08 CN CN202111046269.XA patent/CN113497479B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6108182A (en) * | 1998-10-30 | 2000-08-22 | Intersil Corporation | Overcurrent sensing circuit and self adjusting blanking |
| CN1913272A (en) * | 2005-08-11 | 2007-02-14 | 艾默生网络能源系统有限公司 | Novel input undervoltage/overvoltage protection circuit |
| CN204012796U (en) * | 2014-06-20 | 2014-12-10 | 山西科泰微技术有限公司 | A kind of super capacitor charging circuit |
| CN107994622A (en) * | 2016-10-26 | 2018-05-04 | 宁德时代新能源科技股份有限公司 | Battery power supply circuit |
| CN106445057A (en) * | 2016-11-08 | 2017-02-22 | 福建星海通信科技有限公司 | Automatic and fast discharging circuit and method for monitoring power supply power down |
Non-Patent Citations (1)
| Title |
|---|
| 多功能开关电源保护电路的设计与实现;何玲;《电子工业专用设备》;20151231;第7-13页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113497479A (en) | 2021-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113497479B (en) | Super capacitor charging and discharging system with hysteresis characteristic under-voltage protection function | |
| CN102594111A (en) | Quick discharge circuit | |
| WO2022143736A1 (en) | Power-loss delay circuit and detection control circuit thereof | |
| CN110165912B (en) | Drive circuit of synchronous rectifier | |
| CN117293991A (en) | Solar charging control circuit with protection function | |
| WO2023246506A1 (en) | Starting control circuit and switching power source system | |
| CN113572355B (en) | Power supply circuit with stable output voltage | |
| CN114709109A (en) | Relay slow discharge driving circuit | |
| CN114665697A (en) | Flying capacitor pre-charging circuit and three-level converter | |
| CN216490215U (en) | Self-powered circuit for power switch capable of self-powering | |
| CN111026224B (en) | Auxiliary circuit | |
| CN109525034B (en) | Computer lab stand-by battery electrical power generating system with multiplexed output | |
| CN109245513B (en) | Starting circuit | |
| CN112701796A (en) | Fault indicator power management circuit based on CT energy taking | |
| CN111614062A (en) | Short-circuit protection circuit of multi-output power supply | |
| CN216390555U (en) | Super capacitor power supply circuit with under-voltage protection | |
| CN217240590U (en) | Power supply circuit | |
| CN217522740U (en) | Direct current voltage regulating circuit, circuit board and electrical apparatus | |
| CN218216678U (en) | Power supply protection device | |
| CN113839562B (en) | Multi-output isolated power supply circuit | |
| CN213302883U (en) | Abnormal protection circuit for linear voltage stabilization reference and driving power supply | |
| CN218449865U (en) | Circuit for supplying power to switching power supply control circuit based on auxiliary winding | |
| CN213846540U (en) | Auxiliary power supply circuit, driver and wind power generation system | |
| CN212323716U (en) | Short-circuit protection circuit of multi-output power supply | |
| CN114337280B (en) | Boost circuit and flash chip power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |