CN210629189U - Backup power supply device based on super capacitor - Google Patents
Backup power supply device based on super capacitor Download PDFInfo
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- CN210629189U CN210629189U CN201921921727.8U CN201921921727U CN210629189U CN 210629189 U CN210629189 U CN 210629189U CN 201921921727 U CN201921921727 U CN 201921921727U CN 210629189 U CN210629189 U CN 210629189U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a reserve power supply unit based on super capacitor can be used to electronic equipment's reserve power supply. The backup power supply device based on the super capacitor is a loop consisting of a main power supply module (110), a charging module (120), a discharging module (130) and a super capacitor module (140), the super capacitor module (140) is charged through the charging module (120), and the super capacitor module (140) serves as a backup power supply to supply power to a load through the discharging module (130). The utility model can realize the automatic seamless switching between the main power supply and the backup power supply; the series number of the super capacitor units can be selected according to actual requirements, and the expansion is easy; each super capacitor unit is provided with an independent voltage limiting protection circuit, and the voltage limiting points have hysteresis functions, so that the super capacitor can be effectively prevented from being damaged due to overvoltage. The utility model discloses circuit structure is simple, the component required precision is low, with low costs, reliable operation, easily realization.
Description
Technical Field
The utility model relates to an electronic equipment power application especially relates to a reserve power supply unit based on super capacitor.
Background
The super capacitor is widely applied to electronic equipment, is used as a backup power supply of the electronic equipment, has the advantages of good temperature characteristic, long service life, high reliability, no maintenance, environmental protection and the like compared with a battery used as a backup power supply, and is widely applied to various electronic equipment. But the rated voltage of the super capacitor monomer does not exceed 3V. In application, the super capacitor single body can not meet voltage requirements when used alone, the super capacitor needs to be connected in series to achieve higher voltage, each single body has inconsistency due to various factors, and in the series charging process, the voltage of the single body is inconsistent, so that the single body is possibly damaged due to overvoltage, and the overall performance is damaged.
The existing backup power supply switching circuit and the super capacitor charging and discharging management circuit have the disadvantages of complex circuit design, higher element precision requirement and higher cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, providing a back-up source device based on super capacitor, can be used to electronic equipment's back-up source, have characteristics such as circuit design is simple, the component required precision is low, easy extension.
The utility model relates to a backup power supply device based on super capacitor, including main power module 110, the module of charging 120, the module of discharging 130 and super capacitor module 140, input power Vin is anodal connected to main power module 110's input, and output power Vout is anodal is connected to the output.
The input end of the charging module 120 is connected to the positive electrode of the input power Vin, and the output end is connected to the input end of the discharging module 130 and the positive electrode of the super capacitor module 140.
The input end of the discharging module 130 is connected to the output end of the charging module 120 and the anode of the super capacitor module 140, and the output end is connected to the anode of an output power source Vout;
the positive electrode of the super capacitor module 140 is connected to the output end of the charging module 120 and the input end of the discharging module 130, and the negative electrode is connected to the negative electrode of the input power Vin and the negative electrode of the output power Vout;
further, the main power supply module 110 is a circuit formed by one or more diodes connected in series, and has functions of forward voltage conduction and reverse voltage cutoff.
The charging module 120 is a circuit formed by one or more diodes connected in series and a current-limiting resistor, and has a voltage forward direction conducting and reverse direction stopping function and a charging current limiting function.
The discharging module 130 is a circuit formed by one or more diodes connected in series, and has functions of forward voltage conduction and reverse voltage cutoff.
The super capacitor module 140 is a circuit formed by two or more identical super capacitor units 141, 142 … … 14n connected in series, and each super capacitor unit 14n has a voltage limiting protection function to prevent the super capacitor from being damaged by charging overvoltage.
Further, the super capacitor unit 14n comprises a super capacitor Cn, a power resistor Rn, an electronic switch Sn, a voltage detector Un,
the positive electrode of the super capacitor Cn is connected with the positive electrode of the super capacitor unit 14n, and the negative electrode of the super capacitor unit 14n is connected with the negative electrode of the super capacitor unit.
One end of the power resistor Rn is connected with the anode of the super capacitor unit 14n, and the other end of the power resistor Rn is connected with one end of the electronic switch Sn.
One end of the electronic switch Sn is connected with one end of the power resistor Rn, the other end of the electronic switch Sn is connected with the negative electrode of the super capacitor unit 14n, and the control end of the electronic switch Sn is connected with the output end of the voltage detector Un.
The positive electrode of the voltage detector Un is connected with the positive electrode of the super capacitor unit 14n, the negative electrode of the voltage detector Un is connected with the negative electrode of the super capacitor unit 14n, and the output electrode of the voltage detector Un is connected with the control end of the electronic switch Sn.
The utility model can realize the automatic seamless switching between the main power supply and the backup power supply; the series quantity of the super capacitors can be determined according to requirements, and the expansion is easy; each super capacitor is provided with an independent voltage limiting protection circuit, and the voltage limiting points have hysteresis functions, so that the super capacitor can be effectively prevented from being damaged by charging overvoltage; the utility model discloses circuit structure is simple, the component required precision is low, with low costs, reliable operation, easily realization.
Drawings
Fig. 1 is a schematic structural diagram of a backup power supply device based on a super capacitor according to the present invention;
fig. 2 is a schematic circuit diagram of the backup power supply device based on the super capacitor of the present invention;
fig. 3 is a schematic diagram of the relationship between the super capacitor voltage and the electronic switch on-off of the backup power supply device based on the super capacitor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a backup power supply device based on a super capacitor includes a main power supply module 110, a charging module 120, a discharging module 130, and a super capacitor module 140. The input end of the main power supply module 110 is connected to the positive electrode of the input power Vin, and the output end is connected to the positive electrode of the output power Vout. The input end of the charging module 120 is connected to the positive electrode of the input power Vin, and the output end is connected to the input end of the discharging module 130 and the positive electrode of the super capacitor module 140. The input end of the discharging module 130 is connected to the output end of the charging module 120 and the anode of the super capacitor module 140, and the output end is connected to the anode of the output power source Vout. The super capacitor module 140 has a positive electrode connected to the output end of the charging module 120 and the input end of the discharging module 130, and a negative electrode connected to the negative electrode of the input power Vin and the negative electrode of the output power Vout.
The main power supply module 110 may be a circuit formed by one or more diodes connected in series, and has the functions of forward voltage conduction and reverse voltage cutoff. The charging module 120 may be a circuit formed by one or more diodes connected in series and a current limiting resistor, and has a voltage forward direction conducting and reverse direction blocking function and a charging current limiting function. The discharging module 130 is a circuit formed by one or more diodes connected in series, and has the functions of forward voltage conduction and reverse voltage cutoff.
The super capacitor module 140 is a circuit formed by two or more identical super capacitor units 141, 142 … … 14n connected in series, and each super capacitor unit 14n has a voltage limiting protection function to prevent the super capacitor from being damaged by charging overvoltage.
The super capacitor unit 14n shown in fig. 2 comprises a super capacitor Cn, a power resistor Rn, an electronic switch Sn and a voltage detector Un, wherein the positive electrode of the super capacitor Cn is connected with the positive electrode of the super capacitor unit 14n, and the negative electrode of the super capacitor unit 14n is connected with the negative electrode of the super capacitor unit 14 n.
One end of the power resistor Rn is connected to the positive electrode of the super capacitor unit 14n, and the other end is connected to one end of the electronic switch Sn.
One end of the electronic switch Sn is connected with one end of the power resistor Rn, the other end of the electronic switch Sn is connected with the negative electrode of the super capacitor unit 14n, and the control end of the electronic switch Sn is connected with the output end of the voltage detector Un.
The positive electrode of the voltage detector Un is connected with the positive electrode of the super capacitor unit 14n, the negative electrode of the voltage detector Un is connected with the negative electrode of the super capacitor unit 14n, and the output electrode of the voltage detector Un is connected with the control end of the electronic switch Sn.
There is a preferred embodiment here: the backup power supply device based on the super capacitor comprises a main power supply module 110, a charging module 120, a discharging module 130 and a super capacitor module 140; the input end of the main power supply module 110 is connected with the positive electrode of the input power supply, and the output end is connected with the positive electrode of the output power supply; the charging module 120 and the discharging module 130 are connected in series and then connected in parallel with the main power supply module 110, the input end of the charging module 120 is connected with the input end of the main power supply module 110, the output end of the charging module 120 is connected with the input end of the discharging module 130, and the output end of the discharging module 130 is connected with the output end of the main power supply module 110; the super capacitor module 140 has a positive electrode connected to the junction of the charging module 120 and the discharging module 130, and a negative electrode connected to the negative electrode of the input power source and the negative electrode of the output power source.
The main power supply module 110 is a diode, the charging module 120 is a circuit composed of a diode and a current-limiting resistor, and the discharging module 130 is a diode, and the forward voltage drops of the diodes are all Vd. The rated voltage of the super capacitors C1 and C2 … Cn is 2.7V, and the voltage of the super capacitors C1 and C2 … Cn is Vcn, then the voltage Vc = Vc1+ Vc2+ … + Vcn of the super capacitor module 140, and Vc ≦ 2.7 × n.
The voltage detectors U1 and U2 … Un are R3111H261, the voltage detectors comprise reference voltage units, comparators, detection resistors, output drivers and the like, detection thresholds are fixed internally, the precision is high, and the power consumption is low; the voltage detection threshold Vu is 2.6V, and the hysteresis voltage value Vdet is 0.05V.
The working switching of the main power supply and the standby power supply, the charging and protection principle of the super capacitor are as follows:
main power supply: when the input power Vin supplies power, Vin is greater than Vout + Vd, the main power module 110 is turned on, and the input power Vin supplies power to the output power end Vout through the main power module 110; at this time, Vc < Vout + Vd, the discharging module 130 is turned off in the reverse direction, and the super capacitor module 140 does not supply power to the output power terminal Vout.
Supplying power by a backup power supply: when the input power Vin is powered off, Vc is greater than Vout + Vd, the discharging module 130 is turned on, and the super capacitor module 140 supplies power to the output power terminal Vout through the discharging module 130; at this time, Vin is less than Vout + Vd, and the main power supply module 110 is turned off in the reverse direction; vin < Vc + Vd, the charging module 120 is turned off in reverse.
Charging the super capacitor module 140: when the input power Vin supplies power, the charging module 120 is turned on, the power input charges the super capacitor module 140 through the charging module 120, and the current limiting resistor Rc is used for limiting the charging current, where the charging current Ic = (Vin-Vd-Vc)/Rc.
The voltage limiting protection function of the super capacitor unit 14n is as follows: when the voltage Vcn of the super capacitor gradually increases and the Vcn is less than Vu + Vdet, the control end of the voltage detector Un outputs high level, the electronic switch S1 is switched off, and the super capacitor Cn is charged; when charging is carried out until Vcn is more than or equal to Vu + Vdet, the control end of the voltage detector Un outputs low level, the electronic switch S1 is switched on, and the super capacitor Cn discharges; when discharging is carried out until Vcn ≦ Vu-Vdet, the control end of the voltage detector Un outputs high level, the electronic switch S1 is switched off, and the super capacitor Cn is charged; the process is circulated, so that the super capacitor Cn is limited not to exceed a voltage threshold Vu + Vdet, and the super capacitor is prevented from being damaged due to overvoltage.
The applicant has made the detailed description and description of the embodiments of the present invention with reference to the drawings attached hereto, but it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention.
Claims (7)
1. The utility model provides a backup power supply device based on super capacitor, includes main power module (110), the module of charging (120), the module of discharging (130) and super capacitor module (140), characterized by:
the input end of the main power supply module (110) is connected with the anode of an input power supply, and the output end of the main power supply module is connected with the anode of an output power supply;
the charging module (120) and the discharging module (130) are connected in series and then connected in parallel with the main power supply module (110), the input end of the charging module (120) is connected with the input end of the main power supply module (110), the output end of the charging module (120) is connected with the input end of the discharging module (130), and the output end of the discharging module (130) is connected with the output end of the main power supply module (110);
the positive electrode of the super capacitor module (140) is connected to the joint of the charging module (120) and the discharging module (130), and the negative electrode of the super capacitor module is connected with the negative electrode of the input power supply and the negative electrode of the output power supply.
2. The supercapacitor-based backup power supply device according to claim 1, characterized in that:
the main power supply module (110) is a circuit formed by one or more diodes in series connection and has the functions of forward voltage conduction and reverse voltage cutoff.
3. The supercapacitor-based backup power supply device according to claim 1, characterized in that:
the charging module (120) is a circuit formed by one or more diodes connected in series and a current-limiting resistor, and has the functions of forward voltage conduction, reverse voltage cutoff and charging current limitation.
4. A supercapacitor-based backup power supply unit according to claim 1, characterised in that:
the discharging module (130) is a circuit formed by one or more diodes in series connection and has the functions of forward voltage conduction and reverse voltage cutoff.
5. The supercapacitor-based backup power supply device according to claim 1, characterized in that:
the super capacitor module (140) is a circuit formed by connecting two or more same super capacitor units (141), (142) … … (14n) in series, and each super capacitor unit (14n) has a voltage limiting protection function.
6. The supercapacitor-based backup power supply device according to claim 4, characterized in that:
the super capacitor unit (14n) is composed of a super capacitor Cn, a power resistor Rn, an electronic switch Sn and a voltage detector Un: the super capacitor Cn is sequentially connected with the power resistor Rn and the electronic switch Sn to form a loop; the voltage detector Un is connected between the positive electrode and the negative electrode of the super capacitor Cn in parallel, and the output electrode of the voltage detector Un is connected with the control end of the electronic switch Sn.
7. The supercapacitor-based backup power supply device according to claim 6, characterized in that:
the number of diodes in the main power supply module (110), the charging module (120) and the discharging module (130) is one, and the rated voltage of the super capacitors C1 and C2 … Cn is 2.7V; the voltage detectors U1 and U2 … Un are R3111H261, the voltage detection threshold Vu is 2.6V, and the hysteresis voltage value Vdet is 0.05V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921921727.8U CN210629189U (en) | 2019-11-08 | 2019-11-08 | Backup power supply device based on super capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921921727.8U CN210629189U (en) | 2019-11-08 | 2019-11-08 | Backup power supply device based on super capacitor |
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| Publication Number | Publication Date |
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| CN210629189U true CN210629189U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921921727.8U Active CN210629189U (en) | 2019-11-08 | 2019-11-08 | Backup power supply device based on super capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112398215A (en) * | 2020-11-09 | 2021-02-23 | 广州南方电力集团科技发展有限公司 | Power failure protection circuit for power distribution and consumption network |
| CN112636450A (en) * | 2020-12-10 | 2021-04-09 | 福建星网视易信息***有限公司 | Protection circuit based on super capacitor |
-
2019
- 2019-11-08 CN CN201921921727.8U patent/CN210629189U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112398215A (en) * | 2020-11-09 | 2021-02-23 | 广州南方电力集团科技发展有限公司 | Power failure protection circuit for power distribution and consumption network |
| CN112636450A (en) * | 2020-12-10 | 2021-04-09 | 福建星网视易信息***有限公司 | Protection circuit based on super capacitor |
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