CN201378750Y - Standby power supply device for electronic electric energy meter - Google Patents
Standby power supply device for electronic electric energy meter Download PDFInfo
- Publication number
- CN201378750Y CN201378750Y CN200920063762U CN200920063762U CN201378750Y CN 201378750 Y CN201378750 Y CN 201378750Y CN 200920063762 U CN200920063762 U CN 200920063762U CN 200920063762 U CN200920063762 U CN 200920063762U CN 201378750 Y CN201378750 Y CN 201378750Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- super capacitor
- lithium battery
- circuit
- electric energy
- 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.)
- Expired - Lifetime
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Classifications
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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
Abstract
The utility model discloses a standby power supply device for an electronic electric energy meter, which comprises a lithium battery, a super capacitor capable of receiving power supply from a power grid, a sampling circuit for sampling the voltage of the super capacitor, a voltage comparison circuit, and a switching circuit for selecting the lithium battery and a super power supply. The super capacitor and the lithium battery are both connected with the switching circuit, and the super capacitor is connected with the switching circuit through the sampling circuit and the voltage comparison circuit. The standby power supply device can effectively prolong the power down handling time of an electric meter system, so that the electric energy meter has enough time for power down handling, thereby ensuring the measuring accuracy, and remarkably prolonging the service life of the lithium battery.
Description
Technical field
The utility model relates to a kind of stand-by power supply that is used for electronic electric energy meter.
Background technology
Electronic electric energy meter is an electric energy measuring equipment, and the reliability of stand-by power supply and the measuring accuracy of electric energy meter and user's economic interests are closely related.Extensively adopt now be battery as stand-by power supply, yet the life-span of various batteries and cost have restricted its application in electric energy meter, thereby adopt single battery to have limitation as stand-by power supply.
The utility model content
The purpose of this utility model is to provide a kind of can make the standby power supply device that is used for electronic electric energy meter that electronic electric energy meter is reliable and cost is low.
This standby power supply device that is used for electronic electric energy meter that the utility model provides comprises lithium battery, the commutation circuit that sample circuit, the voltage comparator circuit that also comprises the super capacitor that can receive grid charging, this super capacitor voltage is sampled and being used for selected lithium battery and super power supply, wherein super capacitor is connected with commutation circuit respectively with lithium battery, and super capacitor is connected with commutation circuit with voltage comparator circuit by described sample circuit simultaneously.
Described commutation circuit comprises relay, and described ultracapacitor is connected with the normally-closed contact of relay, and lithium battery is connected with the normally opened contact of relay.
The existing relatively stand-by power supply of the utility model has increased super capacitor, super capacitor can receive grid charging when ammeter runs well, super capacitor is then as the stand-by power supply of ammeter when electrical network electricity interrupts, because super capacitor possesses the ability that can discharge and recharge rapidly, the useful life of overlength and cheaper cost, allows it bear the active and standby power supply of using.And the lithium battery cost is higher, bears the auxiliary standby power supply by it, only enables when the super capacitor undertension.Therefore the utility model can effectively prolong the ammeter system power down process time, makes electric energy meter have time enough to carry out power down process, guaranteeing its measuring accuracy, and can prolong lithium battery useful life greatly.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the circuit diagram of a kind of execution mode of the utility model.
Embodiment
As can be seen from Figure 1, the utility model comprises super capacitor, lithium battery, super capacitor sample circuit, voltage comparator circuit, commutation circuit, wherein super capacitor and lithium battery are made stand-by power supply, sample circuit is sampled to super capacitor voltage, comparator compares capacitance terminal voltage and reference voltage, and commutation circuit is selected the stand-by power supply powering load according to comparative result.
Fig. 2 is the circuit diagram of a kind of execution mode of the utility model, therefrom as can be seen, Vli is a lithium battery voltage, Vcsup is a super capacitor voltage, D1 is a voltage-stabiliser tube, U1 is the comparator in the voltage comparator circuit, this comparator adopts low power consumption comparator can effectively prolong lithium battery useful life, input at this comparator is connected with resistance R 2, R3, to form hysteresis comparator, can avoid the relay frequent movement that causes because of the super capacitor voltage fluctuation, Q1 is MOSFET (field effect transistor), and commutation circuit mainly is made up of relay, the normally opened contact of this relay is connected with lithium battery, normally-closed contact is connected with super capacitor, and the action of relay is controlled by Q1, and this relay adopts magnetic latching relay (RELAY).When system's power down, super capacitor voltage and reference voltage Vref compare, when super capacitor voltage is higher than Vref+H/2 (H is the width by the hysteresis comparator of R2, R3 and comparator decision), the comparator output low level, Q1 ends, relay coil place power failure state, super capacitor is through the normally-closed contact powering load; And when super capacitor is lower than Vref-H/2, comparator output high level, the Q1 conducting, it is electric that relay coil gets, and normally-closed contact disconnects, and the normally opened contact closure is by the lithium battery powering load.
Claims (3)
1, a kind of standby power supply device that is used for electronic electric energy meter, comprise lithium battery, the commutation circuit that sample circuit, the voltage comparator circuit that it is characterized in that also comprising the super capacitor that can receive grid charging, this super capacitor voltage is sampled and being used for selected lithium battery and super power supply, wherein super capacitor is connected with commutation circuit respectively with lithium battery, and super capacitor is connected with commutation circuit with voltage comparator circuit by described sample circuit simultaneously.
2, the standby power supply device that is used for electronic electric energy meter according to claim 1 is characterized in that commutation circuit comprises relay, and described ultracapacitor is connected with the normally-closed contact of relay, and lithium battery is connected with the normally opened contact of relay.
3, the standby power supply device that is used for electronic electric energy meter according to claim 1, it is characterized in that the comparator that described voltage comparator circuit adopts adopts low power consumption comparator, and the input of this comparator is connected with resistance R 2 and the resistance R 3 that is used to produce hesitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920063762U CN201378750Y (en) | 2009-03-20 | 2009-03-20 | Standby power supply device for electronic electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920063762U CN201378750Y (en) | 2009-03-20 | 2009-03-20 | Standby power supply device for electronic electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201378750Y true CN201378750Y (en) | 2010-01-06 |
Family
ID=41518870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920063762U Expired - Lifetime CN201378750Y (en) | 2009-03-20 | 2009-03-20 | Standby power supply device for electronic electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201378750Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292384A (en) * | 2013-06-19 | 2013-09-11 | 浙江盾安自控科技有限公司 | Heating measuring system with on-off time area method |
| CN103730953A (en) * | 2014-01-24 | 2014-04-16 | 深圳市思达仪表有限公司 | IC (Integrated Circuit) card intelligent water meter, and power supply managing circuit and method of IC card intelligent water meter |
| CN104092289A (en) * | 2014-08-06 | 2014-10-08 | 广东电网公司珠海供电局 | Ammeter |
| CN105356586A (en) * | 2015-12-08 | 2016-02-24 | 深圳市通普科技有限公司 | LED display screen supply circuit |
| CN106157594A (en) * | 2016-08-12 | 2016-11-23 | 北京溢美四方软件技术有限公司 | The intelligent electric meter communication unit of a kind of built-in stand-by power supply and control method |
-
2009
- 2009-03-20 CN CN200920063762U patent/CN201378750Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292384A (en) * | 2013-06-19 | 2013-09-11 | 浙江盾安自控科技有限公司 | Heating measuring system with on-off time area method |
| CN103730953A (en) * | 2014-01-24 | 2014-04-16 | 深圳市思达仪表有限公司 | IC (Integrated Circuit) card intelligent water meter, and power supply managing circuit and method of IC card intelligent water meter |
| CN104092289A (en) * | 2014-08-06 | 2014-10-08 | 广东电网公司珠海供电局 | Ammeter |
| CN105356586A (en) * | 2015-12-08 | 2016-02-24 | 深圳市通普科技有限公司 | LED display screen supply circuit |
| CN105356586B (en) * | 2015-12-08 | 2019-01-15 | 张长领 | LED display power supply circuit |
| CN106157594A (en) * | 2016-08-12 | 2016-11-23 | 北京溢美四方软件技术有限公司 | The intelligent electric meter communication unit of a kind of built-in stand-by power supply and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100106 |
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| CX01 | Expiry of patent term |