CN110768362A - Backup power supply control system based on super capacitor - Google Patents
Backup power supply control system based on super capacitor Download PDFInfo
- Publication number
- CN110768362A CN110768362A CN201810823437.3A CN201810823437A CN110768362A CN 110768362 A CN110768362 A CN 110768362A CN 201810823437 A CN201810823437 A CN 201810823437A CN 110768362 A CN110768362 A CN 110768362A
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- China
- Prior art keywords
- super capacitor
- circuit
- power supply
- capacitor module
- charging control
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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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a backup power control system based on a super capacitor, which comprises a main power supply circuit, a charging control circuit, a super capacitor module, a change-over switch circuit and a system load, wherein the main power supply circuit is connected with the charging control circuit and the change-over switch circuit, the output of the charging control circuit is connected with the super capacitor module, the change-over switch circuit is connected with the main power supply circuit, the super capacitor module and the system load, and an MCU in the system load is connected with the charging control circuit to control the super capacitor module to be charged. After the super capacitor module is charged to a rated value, a charging control circuit cuts off a main power supply channel to be used as a backup power supply to supply power under the normal working state of the system. When the system is in power failure or under-voltage state, the power supply change-over switch acts, the super capacitor module supplies power to the system load and completes corresponding data storage and protection operation.
Description
Technical Field
The invention relates to the technical field of backup power supplies of power equipment, in particular to a backup power supply control system based on a super capacitor.
Background
In the operation process of the equipment, when power failure or abnormal power failure occurs, the data temporarily stored in the volatile memory can be threatened, and in order to protect the integrity of the data, a back-up power supply needs to be added into the equipment, so that the state recording and necessary system configuration are carried out on important units or key components in the equipment.
In a traditional system, a rechargeable battery is generally adopted as a backup power supply, the problems that the power failure protection time is too short, the charging current is too large, the service life is short, the board-level integration with a general MCU (microprogrammed control unit) with low current output cannot be carried out and the like exist, the rechargeable battery needs to be replaced periodically, and the environment is still polluted to a certain extent. With the advances in flash memory performance (lower power consumption and faster write times) and the technological improvements of supercapacitors (lower ESR and higher capacitance per unit volume), it has become possible to replace the batteries in these systems with supercapacitors that have longer lifetimes, higher performance, and "better environmental performance".
The super capacitor is a novel energy storage element between a chemical battery and a common capacitor, and has the advantages of super capacitance, simple control, no pollution, high power density, higher energy than a rechargeable battery, high efficiency and quick charge and discharge, long charging life than the rechargeable battery, wide use temperature range and the like, so that the super capacitor is more and more emphasized and has been widely applied in a plurality of fields.
In recent years, the super capacitor in the power system is increasingly used, and there are clear technical specification requirements in the intelligent distribution terminal equipment:
a) the terminal adopts a super capacitor as a backup power supply and is integrated in the terminal. When the main power supply of the terminal fails, the super capacitor can be automatically and seamlessly put into use, the normal work of the terminal and the terminal communication module is maintained for at least 1 minute, and the super capacitor has the capability of communicating with the master station for 3 times to finish data reporting;
b) when the working power supply is lost, the terminal should ensure that all setting values and recorded data are stored for no less than 1 year;
c) the size of the super capacitor is not more than 45 x 60 x 34, the super capacitor meets the RoHS requirement, and the maintenance-free time of the super capacitor is not less than 8 years.
Disclosure of Invention
The invention aims to provide a backup power supply control system based on a super capacitor, wherein the super capacitor is used as a backup power supply in the running process of intelligent distribution transformer terminal equipment, the backup power supply can be quickly fully charged under a charging voltage of 5V, the constant current power supply is carried out during the power failure of the system, the discharge lasts for 5 minutes, the normal work of a terminal and a terminal communication module is maintained, and the backup power supply control system has the capability of communicating with a master station for 3 times to finish data reporting.
The technical scheme of the invention is as follows: the utility model provides a reserve power control system based on super capacitor which characterized in that: the charging control circuit comprises a main power supply circuit, a charging control circuit, a super capacitor module, a change-over switch circuit and a system load, wherein the main power supply circuit is connected with the charging control circuit and the change-over switch circuit, the output of the charging control circuit is connected with the super capacitor module, the change-over switch circuit is connected with the main power supply circuit, the super capacitor module and the system load, and an MCU in the system load is connected with the charging control circuit to control the super capacitor module to charge.
The backup power control system based on the super capacitor is further characterized in that: by adopting an off-line topological structure, after the super capacitor module is charged to a rated value, a charging control circuit cuts off a main power supply channel to be used as a backup power supply to supply power under the normal working state of the system. When the system is in power failure or under-voltage state, the power supply change-over switch acts, the super capacitor module supplies power to the system load and completes corresponding data storage and protection operation. According to the scheme, the super capacitor is closed after charging is completed, and works only when the system is powered off, so that the service life is long; the super capacitor can be charged to a rated value, and the stored electric energy is large.
In the design, the charging and discharging effective electric quantity, namely the charging and discharging depth, of the super capacitor is ensured, and the constant current discharging mode is determined in consideration of the convenience and operability of control during charging and discharging.
The super capacitor module selects two super capacitor series modules with 2.7V according to the principle that the energy required by the circuit to keep working is reduced by the super capacitor, the rated voltage of the super capacitor series modules is 5.4V, the rated capacity of the super capacitor series modules is 60F, and the working temperature range is-40-70 ℃.
The charging control circuit adopts a micro-power monolithic Buck IC, and the IC has a current-limiting function and prevents the circuit from being damaged by larger impact current generated by low internal resistance of the super capacitor during power-on.
The charging control circuit is further characterized in that: after a power supply is powered on, detecting the voltage of the super capacitor through a detection circuit, and when the voltage is lower than a set threshold value, controlling the IC to charge the super capacitor by the MCU; when the voltage of the super capacitor reaches the set rated voltage, the MCU sends a signal to close the charging circuit through the switch circuit so as to achieve the purpose of closing the super capacitor for charging.
The schematic diagram of the switching circuit is shown in fig. 2, and the switching circuit mainly comprises a switching tube, a PMOS, a resistor and other elements. The working principle is as follows: when the MCU detects that the power supply is normal, the MCU _ IO port outputs a signal to control the switch tube to be switched off, so that the PMOS tube is in a cut-off state, and the super capacitor is in an off-line state. When the system power supply loses power, the switch tube is conducted, the PMOS tube is in a conducting state through resistance adjustment, and the super capacitor module serving as a backup power supply supplies power to the system load.
Drawings
Fig. 1 is a block diagram of a backup power control system based on a super capacitor according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a circuit of a switch of a backup power control system based on a super capacitor according to an embodiment of the present invention.
Detailed Description
In order to facilitate the understanding of those skilled in the art, the present invention will be further described with reference to the following examples.
The backup power control system based on the super capacitor of the embodiment is shown in fig. 1, and includes a main power supply circuit, a charging control circuit, a super capacitor module, a switch circuit, a system load, and the like. The main power supply 5V is connected with the charging control circuit and the change-over switch circuit, the output of the charging control circuit is connected with the super capacitor module, the change-over switch circuit is connected with the main power supply circuit, the super capacitor module and the system load, and the MCU is connected with the charging control circuit to control the super capacitor module to charge. By adopting an off-line topological structure, after the super capacitor module is charged to a rated value, a charging control circuit cuts off a main power supply channel to be used as a backup power supply to supply power under the normal working state of the system. When the system is in power failure or under-voltage state, the power supply change-over switch acts, the super capacitor module supplies power to the system load and completes corresponding data storage and protection operation. According to the scheme, the super capacitor is closed after charging is completed, and works only when the system is powered off, so that the service life is long; the super capacitor can be charged to a rated value, and the stored electric energy is large. The charging control circuit adopts a micro-power monolithic Buck IC which has a current limiting function and prevents the circuit from being damaged by larger impact current generated by low internal resistance of the super capacitor during power-on; after the super capacitor is detected to reach the rated voltage, the MCU controls the enabling port of the IC to achieve the purpose of closing the super capacitor for charging. According to the principle that the energy required by the circuit to keep working is reduced by the super capacitor, two super capacitor series modules of 2.7V are selected and adopted by the super capacitor module, the rated voltage of the super capacitor series module is 5.4V, the rated capacity of the super capacitor series module is 60F, and the working temperature range is-40-70 ℃. The switch circuit mainly utilizes the switching characteristic of the PMOS tube, when the system is powered off, the PMOS tube is conducted, and the super capacitor module supplies power to the system.
The backup power control system scheme based on the super capacitor is provided aiming at the technical specification requirement of the intelligent distribution transformer terminal equipment, based on the characteristics of high power density, high efficiency, quick charge and discharge, long charging life and simple control circuit of the super capacitor and combined with the real-time requirement of an embedded operating system. According to the scheme, the super capacitor is used as a backup power supply, the super capacitor can be quickly fully charged under the charging voltage of 5V, the constant-current power supply is carried out during the system power failure, the constant-current power supply lasts for 5 minutes, the terminal and the terminal communication module are maintained to normally work, the super capacitor has the capability of communicating with a main station for 3 times and reporting data, and is applied to a distribution transformer terminal, so that the expected effect is achieved.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention falls within the protection scope of the present invention. The technology not related to the invention can be realized by the prior art.
Claims (6)
1. The utility model provides a reserve power control system based on super capacitor which characterized in that: the charging control circuit comprises a main power supply circuit, a charging control circuit, a super capacitor module, a change-over switch circuit and a system load, wherein the main power supply circuit is connected with the charging control circuit and the change-over switch circuit, the output of the charging control circuit is connected with the super capacitor module, the change-over switch circuit is connected with the main power supply circuit, the super capacitor module and the system load, and an MCU in the system load is connected with the charging control circuit to control the super capacitor module to charge.
2. The supercapacitor-based backup power control system according to claim 1, characterized in that: after the super capacitor module is charged to a rated value, the charging control circuit cuts off a main power supply channel to be used as a backup power supply and does not participate in power supply of the system in a normal working state; when the system is in power failure or under-voltage state, the switch circuit is switched to act, the super capacitor module supplies power to the system load, and corresponding data storage and protection operations are completed.
3. The supercapacitor-based backup power control system according to claim 1 or 2, characterized in that: the charging control circuit adopts a micro-power monolithic Buck IC which has a current limiting function and prevents a circuit from being damaged by a larger impact current generated by the low internal resistance of the super capacitor during power-on; after the super capacitor is detected to reach the rated voltage, the MCU sends a signal to close the charging circuit through the switch circuit so as to achieve the purpose of closing the super capacitor for charging.
4. The supercapacitor-based backup power control system according to claim 1 or 2, characterized in that: the super capacitor module selects two super capacitor series modules with 2.7V according to the principle that the energy required by the circuit to keep working is reduced by the super capacitor, the rated voltage of the super capacitor series modules is 5.4V, the rated capacity of the super capacitor series modules is 60F, and the working temperature range is-40-70 ℃.
5. The supercapacitor-based backup power control system according to claim 1 or 2, characterized in that: the switch circuit utilizes the switching characteristic of the PMOS tube, when the system is powered off, the PMOS tube is conducted, and the super capacitor supplies power to the system.
6. The supercapacitor-based backup power control system according to claim 1 or 2, characterized in that: the system adopts an off-line topology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823437.3A CN110768362A (en) | 2018-07-25 | 2018-07-25 | Backup power supply control system based on super capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823437.3A CN110768362A (en) | 2018-07-25 | 2018-07-25 | Backup power supply control system based on super capacitor |
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| CN110768362A true CN110768362A (en) | 2020-02-07 |
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| CN201810823437.3A Pending CN110768362A (en) | 2018-07-25 | 2018-07-25 | Backup power supply control system based on super capacitor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114301134A (en) * | 2021-12-29 | 2022-04-08 | 广州南方电力集团科技发展有限公司 | Back-up power on-off control circuit |
| CN116316765A (en) * | 2023-04-12 | 2023-06-23 | 南通国轩新能源科技有限公司 | Super-capacitor-based energy storage system power-off delay protection method |
| CN117674396A (en) * | 2024-02-01 | 2024-03-08 | 季华实验室 | Uninterruptible power supply system based on super capacitor |
-
2018
- 2018-07-25 CN CN201810823437.3A patent/CN110768362A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114301134A (en) * | 2021-12-29 | 2022-04-08 | 广州南方电力集团科技发展有限公司 | Back-up power on-off control circuit |
| CN114301134B (en) * | 2021-12-29 | 2024-05-24 | 广州南方电力集团科技发展有限公司 | On-off control circuit of backup power supply |
| CN116316765A (en) * | 2023-04-12 | 2023-06-23 | 南通国轩新能源科技有限公司 | Super-capacitor-based energy storage system power-off delay protection method |
| CN117674396A (en) * | 2024-02-01 | 2024-03-08 | 季华实验室 | Uninterruptible power supply system based on super capacitor |
| CN117674396B (en) * | 2024-02-01 | 2024-05-28 | 季华实验室 | Uninterruptible power supply system based on super capacitor |
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Address after: 211100 No. 5 Jinxin East Road, Jiangning District, Nanjing City, Jiangsu Province Applicant after: Nanjing Jialong Electric Technology Co., Ltd Address before: 211100 No. 5 Jinxin East Road, Jiangning District, Nanjing City, Jiangsu Province Applicant before: NANJING JIALONG ELECTRIC TECHNOLOGY Co.,Ltd. |
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