CN222721182U - Power supply switching circuit utilizing super capacitor for charging and discharging - Google Patents
Power supply switching circuit utilizing super capacitor for charging and discharging Download PDFInfo
- Publication number
- CN222721182U CN222721182U CN202420990614.8U CN202420990614U CN222721182U CN 222721182 U CN222721182 U CN 222721182U CN 202420990614 U CN202420990614 U CN 202420990614U CN 222721182 U CN222721182 U CN 222721182U
- Authority
- CN
- China
- Prior art keywords
- power
- chip
- smd
- power supply
- supercapacitor
- 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
- 238000007599 discharging Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 title claims description 48
- 239000003985 ceramic capacitor Substances 0.000 claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims abstract description 9
- 230000009977 dual effect Effects 0.000 claims abstract 6
- 238000012544 monitoring process Methods 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 229910052573 porcelain Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
本实用新型涉及利用超级电容充放电的电源切换电路，其包括限流电阻R1、R2、R3;贴片瓷片电容C1、C2、C3、C4;贴片双二极管D1、D2；电源芯片U1、U2；储能单元超级电容E1；贴片瓷片电容C1一端连接系统GND且另外一端连接电路输入电源MHVDD；电源芯片U1输入端VIN连接输入电源MHVDD，GND端连接系统GND，输出端VOUT连接二极管D1；贴片瓷片电容C2一端连接D1且另外一端连接系统GND；贴片双二极管D1的另外一端连接限流电阻R1。
The utility model relates to a power switching circuit utilizing supercapacitor charging and discharging, which comprises current limiting resistors R1, R2, and R3; SMD ceramic capacitors C1, C2, C3, and C4; SMD dual diodes D1 and D2; power supply chips U1 and U2; an energy storage unit supercapacitor E1; one end of the SMD ceramic capacitor C1 is connected to a system GND and the other end is connected to a circuit input power supply MHVDD; an input end VIN of the power supply chip U1 is connected to an input power supply MHVDD, a GND end is connected to a system GND, and an output end VOUT is connected to a diode D1; one end of the SMD ceramic capacitor C2 is connected to D1 and the other end is connected to the system GND; and the other end of the SMD dual diode D1 is connected to the current limiting resistor R1.
Description
Technical Field
The utility model relates to a power supply switching circuit utilizing super capacitor charge and discharge.
Background
As a basic introduction, the smart meter is a core including a power supply system (including a power supply switching circuit), a Microprocessor (MCU), a metering chip, a memory unit, and a communication module. The microprocessor is responsible for data acquisition, processing and storage, the memory unit is used for storing historical data, the super capacitor charging and discharging circuit belongs to a core component of the intelligent ammeter power supply switching circuit, and plays a great role in the power-on and power-off state of the intelligent ammeter. The super capacitor charging and discharging circuit comprises a charging circuit, a discharging circuit, a leakage-proof diode, a current limiting circuit and a control circuit.
As an improvement on charge and discharge, the super capacitor of the core element is improved, so that chemical reaction does not occur in the process of charging, and the whole charging process is reversible, so that the super capacitor can be charged and discharged repeatedly. When the power of the power grid is cut, the intelligent ammeter power supply switching circuit is automatically switched to MCU power supply, when the power grid is cut, the MCU detects that an external power failure event occurs, a period of time is needed to be maintained for completing the recording of power cut data and event reporting, and great power consumption can be generated. The higher the frequency of power failure event is, the more obvious the consumption of lithium battery electric quantity is, so that the super capacitor charging and discharging circuit plays a vital role, and the super capacitor is switched in time to supply power to the whole system at the moment of power failure, thereby greatly prolonging the service life of the lithium battery and solving the problems of untimely event storage, untimely event reporting, abnormal data caused by out-of-control system reset and the like caused by insufficient power supply after power failure of the power grid.
The utility model combines the super capacitor charge and discharge management system, can effectively solve the problem of shorter service life of the lithium battery, and also solves the problems of electric quantity exhaustion, aging and failure of the lithium battery, such as important data loss, abnormality, clock disorder and the like of the electric energy meter
Disclosure of utility model
The technical problem to be solved by the utility model is to provide a power supply switching circuit utilizing the charging and discharging of the super capacitor, so that the automatic switching of the power supply is realized after the power grid is powered off, the economy, the environmental protection, the high efficiency and the long service life are realized, and the stability and the reliability of a control system are improved.
In order to solve the problems, the utility model adopts the following technical scheme:
In order to realize automatic switching, the utility model adopts a power supply switching circuit which utilizes super-capacitor charge and discharge and comprises current limiting resistors R1, R2 and R3, patch porcelain chip capacitors C1, C2, C3 and C4, patch double diodes D1 and D2, power supply chips U1 and U2, an energy storage unit super-capacitor E1;
one end of the chip capacitor C1 is connected with the system GND, and the other end is connected with the circuit input power supply MHVDD;
the input end VIN of the power chip U1 is connected with an input power supply MHVDD, the GND end is connected with a system GND, and the output end VOUT is connected with a diode D1;
One end of the chip capacitor C2 is connected with the D1, and the other end is connected with the system GND;
The other end of the patch double diode D1 is connected with a current-limiting resistor R1,
The other end of the current-limiting resistor R1 is connected with the super capacitor E1 of the energy storage unit, one end of the super capacitor E1 of the energy storage unit is connected with the VIN end of the power chip U2, the other end is connected with the system GND,
The GND pin of the power chip U2 is connected with the system GND, the VOUT end of the power chip U2 is connected with the patch double diode D2 and the patch porcelain piece capacitor C3, the other end of the patch double diode D2 is connected with the MCU power supply pin MVDD, and the other end of the patch porcelain piece capacitor C3 is connected with the system GND;
And one end of the current limiting resistor R2 is connected with E1, the other end of the current limiting resistor R2 is connected with the MCU ADC port network identifier, the Power monitoring is connected with the current limiting resistor R3 and the chip porcelain piece capacitor C4, and the other ends of the current limiting resistor R3 and the chip porcelain piece capacitor C4 are connected with the system GND.
As a further improvement of the technical scheme, the current limiting resistors R1, R2 and R3 are patch thick film resistors.
The chip capacitor C1 is a filter capacitor of the power supply MHVDD.
As a further improvement of the technical scheme, the chip ceramic capacitor C2 is a filter capacitor at the end of the power chip U1 VOUT.
As a further improvement of the technical scheme, the chip capacitor C3 is a filter capacitor at the end of the power chip U2 VOUT.
As a further improvement of the technical scheme, the chip capacitor C4 is a filter capacitor of the network Power monitoring.
The utility model has the beneficial effects of 1 greatly prolonging the service life of the lithium battery, 2 solving the problems of data storage and event reporting after power failure of a power grid, enhancing the stability of the system, 3 having simple circuit, low cost, strong adaptability and practicability, 4 having economic, environment-friendly, high-efficiency and long service life of the super capacitor circuit.
Drawings
Fig. 1 is a schematic circuit diagram of the present utility model.
Description of the components:
R1 is a current limiting resistor, the maximum working voltage is preferably 200V, and the precision is preferably 1%
R2 and R3 are sampling resistors, the maximum working voltage is preferably 50V, and the precision is preferably 1%
C1 is a filter capacitor, and the maximum working voltage is preferably 50V
C2, C3 and C4 are filter capacitors, and the maximum working voltage is preferably 16V
D1 and D2 are Schottky diodes, the maximum working voltage is preferably 30V, and the maximum working current is preferably 0.2A
E1 is super capacitor, preferably rated voltage is 5.5V, capacity is 1.5F
The power chip U1 preferably has a maximum operating voltage of 40V, a maximum output current of 0.3A and an output voltage of 5.3V
The power supply chip U2 preferably has a maximum quiescent power consumption of 1uA, a maximum operating voltage of 12V, and a maximum output circuit of 500mA.
Detailed Description
As shown in fig. 1, the power switching circuit using super capacitor charging and discharging in this embodiment is obvious to those skilled in the art to combine several technical solutions of the present utility model. Such modifications and substitutions do not depart from the spirit and scope of the technical solutions according to the embodiments of the present utility model, and the content related to the utility model is described in this patent, which is omitted or simplified as conventional technology.
The electric energy meter utilizes the super capacitor to charge and discharge to realize the circuit of power supply switching.
The circuit comprises chip thick film resistors R1, R2 and R3, chip ceramic chip capacitors C1, C2, C3 and C4, chip double diodes D1 and D2, power chips U1 and U2 and an energy storage unit super capacitor E1;
The chip capacitor C1 is connected with the other end of the system GND and the other end of the system GND through a circuit input Power supply MHVDD, the input end VIN of the Power chip U1 is connected with the input Power supply MHVDD, the GND end is connected with the system GND, the output end VOUT is connected with the diode D1, the other end of the Power chip is connected with the system GND, the other end of the Power chip D1 is connected with the current limiting resistor R1, the other end of the Power chip R1 is connected with the E1, one end of the E1 is connected with the VIN end of the Power chip U2, the other end of the Power chip D2 is connected with the system GND, the VOUT end of the U2 is connected with the D2 and the C3, the other end of the D2 is connected with the MCU Power supply pin MVDD, the other end of the C3 is connected with the system GND, one end of the R2 is connected with the E1, the other end of the Power supply monitoring network is connected with the MCU ADC port and is identified as Power monitoring, the Power monitoring is connected with the R3 and the C4, and the other ends of the MCU and the C4 are connected with the system GND.
C1 is the filter capacitor of Power MHVDD, C2 is the filter capacitor of Power chip U1 VOUT end, C3 is the filter capacitor of Power chip U2 VOUT end, and C4 is the filter capacitor of network Power monitoring.
The Power monitoring ADC ports sample the electric quantity of the super capacitor E1 through resistor voltage division of R2 and R3, and accurate electric quantity data is calculated.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420990614.8U CN222721182U (en) | 2024-05-09 | 2024-05-09 | Power supply switching circuit utilizing super capacitor for charging and discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420990614.8U CN222721182U (en) | 2024-05-09 | 2024-05-09 | Power supply switching circuit utilizing super capacitor for charging and discharging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222721182U true CN222721182U (en) | 2025-04-04 |
Family
ID=95160273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420990614.8U Active CN222721182U (en) | 2024-05-09 | 2024-05-09 | Power supply switching circuit utilizing super capacitor for charging and discharging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222721182U (en) |
-
2024
- 2024-05-09 CN CN202420990614.8U patent/CN222721182U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202512170U (en) | Intelligent ammeter communication module circuit structure having power-off protection function | |
| CN201230199Y (en) | Power-down protection circuit | |
| WO2019218882A1 (en) | Super-capacitor application circuit of replaceable battery type smart electric energy meter power supply | |
| AU2021294050B2 (en) | Battery device control circuit | |
| CN205986249U (en) | Extremely low electric automobile power battery management system of self consumption | |
| CN103580272A (en) | Time-delay circuit for outage of power source | |
| CN108879892B (en) | Automatic switching power supply system for double battery packs | |
| CN205670717U (en) | Long-life intelligent electric energy meter | |
| CN101420131A (en) | Energy saving control method for lithium ionic battery protection circuit and control circuit thereof | |
| CN208112325U (en) | The super capacitor application circuit of battery changeable type intelligent electric energy meter power supply | |
| CN222721182U (en) | Power supply switching circuit utilizing super capacitor for charging and discharging | |
| CN214794993U (en) | Ammeter circuit and ammeter | |
| CN103166297B (en) | Power-fail protection circuit without backup battery | |
| CN212909093U (en) | Backup power circuit of modular power consumption information acquisition terminal | |
| CN219268542U (en) | Super capacitor charge and discharge management module based on negative feedback current limiting circuit | |
| CN201805219U (en) | Battery protector with time control function | |
| CN214850617U (en) | Super capacitor-based gas meter power-down reporting circuit | |
| CN111525542B (en) | Power supply method for safely storing data of intelligent electric energy meter | |
| CN204706353U (en) | A kind of data memory protection circuit | |
| CN210693553U (en) | Embedded UPS module | |
| CN220914968U (en) | Backup power supply control circuit | |
| CN203104083U (en) | power down protection circuit | |
| CN201307773Y (en) | Energy-saving control circuit of lithium ion battery | |
| CN218941118U (en) | Circuit for judging power failure time in gateway | |
| CN101470503A (en) | CMOS chip power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |