CN202149911U - Power supply circuit of external battery for intelligent three-phase charge control electric meter - Google Patents
Power supply circuit of external battery for intelligent three-phase charge control electric meter Download PDFInfo
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- CN202149911U CN202149911U CN201120219990U CN201120219990U CN202149911U CN 202149911 U CN202149911 U CN 202149911U CN 201120219990 U CN201120219990 U CN 201120219990U CN 201120219990 U CN201120219990 U CN 201120219990U CN 202149911 U CN202149911 U CN 202149911U
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Abstract
The utility model relates to a power supply circuit and provides a power supply circuit of an external battery for an intelligent three-phase charge control electric meter. The power supply circuit comprises a power-failure detection unit, an external battery control unit, a DC-DC boost unit, an external battery unit, a battery voltage detection unit and a single-chip microcomputer unit. The output terminal of the power-failure detection unit is connected with the power-failure detection port of the single-chip microcomputer unit. The power-failure detection port of the single-chip microcomputer unit is connected with the external battery control unit. The output terminal of the external battery control unit is connected with the DC-DC boost unit. The external battery control unit is connected with the external battery unit. The external battery unit is connected with the battery voltage detection unit. The output terminal of the battery voltage detection unit is connected with the battery voltage detection port of the single-chip microcomputer unit. According to the utility model, only one external battery is adopted and is cooperated with the DC-DC boost unit to provide a power-failure meter reading power supply for an electric meter, thereby reducing the hardware cost of the electric meter and better according with the development trend of green and environmental protection.
Description
Technical field
The utility model relates to a kind of power circuit, and particularly a kind of three-phase takes control intelligent electric energy meter external battery power circuit.
Background technology
General three-phase takes on the control intelligent electric energy meter installs two external battery, and two batteries adopt series systems, and power supply when after the inner mu balanced circuit voltage stabilizing of electric energy meter, having a power failure as electric energy meter supplies the use of electric energy meter power failure meter-reading function.Use the mode of two external battery, both increased the electric energy meter hardware cost, do not meet the development trend of environmental protection again.
Summary of the invention
The purpose of the utility model is exactly in order to overcome the weak point of above-mentioned prior art; And provide a kind of three-phase expense to control intelligent electric energy meter external battery power circuit; This circuit uses an external battery, and cooperating the DC-DC booster circuit is that three-phase expense control intelligent electric energy meter provides the power supply of checking meter that has a power failure.
The purpose of the utility model realizes through following technical measures: a kind of three-phase expense control intelligent electric energy meter external battery power circuit; Comprise detection of power loss unit, external battery control module, DC-DC boosting unit, external battery unit, battery voltage detection unit and single machine unit; Its said detection of power loss unit output terminal links to each other with the detection of power loss mouth of single machine unit; The detection of power loss mouth of single machine unit links to each other with the external battery control module; The output terminal of external battery control module links to each other with the DC-DC boosting unit; The external battery control module links to each other with the external battery unit, and the external battery unit links to each other with the battery voltage detection unit, and the output terminal of battery voltage detection unit links to each other with the battery voltage detection mouth of single machine unit.
In technique scheme, said detection of power loss unit comprises capacitor C 1, voltage reset chip IC1, switching transistor BG1 and resistance R 1 ~ resistance R 4; Wherein, capacitor C 1 is connected between voltage VDD and the GND, and reset 3 pin of chip IC1 of voltage are connected to voltage VDD; 2 pin of IC1 are connected to GND, and 1 pin of IC1 is connected to voltage VDD through resistance R 1, and 1 pin of IC1 is connected to 2 pin of BG1 through resistance R 2; 1 pin of BG1 is connected to GND; 2 pin of BG1 are connected to GND through resistance R 3, and 6 pin of BG1 are connected to voltage VCC through resistance R 4, and 6 pin of BG1 are connected to the detection of power loss mouth P01 of single machine unit.
In technique scheme, said external battery control circuit comprises switching transistor BG1, resistance R 5 ~ resistance R 8, diode D1 and FET Q1; Wherein, 5 pin of BG1 are connected to the detection of power loss mouth P01 of single machine unit through resistance R 5, and 4 pin of BG1 are connected to voltage VCC, and 3 pin of BG1 are connected to GND through resistance R 6; 3 pin of BG1 connect the negative pole of diode D1; The positive pole of diode D1 is connected to the grid G of FET Q1 through resistance R 8, and resistance R 7 is connected between the source S and grid G of FET Q1, and the drain D of FET is connected to the DC-DC boosting unit.
In technique scheme, said DC-DC boosting unit comprises capacitor C 4, capacitor C 5, diode D2, voltage stabilizing diode D3 and step-up DC-DC conversion chip IC2; Wherein, the drain D of FET is connected to 3 pin of IC2 in the external battery control circuit, and 1 pin of IC2 is connected to GND; 2 pin of IC2 connect the negative pole of voltage stabilizing diode D3; The positive pole of voltage stabilizing diode D3 is connected to GND, and 2 pin of IC2 are the external battery voltage output, and 3 pin of IC2 are connected to 2 pin of IC2 through diode D2; Capacitor C 4 is connected in parallel between 3 pin and GND of IC2, and capacitor C 5 is connected in parallel on the two ends of voltage stabilizing diode D3.
In technique scheme, in the said external battery unit, the positive pole of battery BT1 is connected to the source S of FET Q1 in the external battery control circuit, and the negative pole of battery BT1 is connected to GND, and capacitor C 3 is connected in parallel on the two ends of battery BT1.
In technique scheme, said battery voltage detection unit comprises resistance R 9, resistance R 10 and capacitor C 2; Wherein, Resistance R 9 one ends are connected the positive pole of battery BT1, and the other end is connected to single-chip microcomputer battery voltage detection mouth P02, and resistance R 10 1 ends are connected to single-chip microcomputer battery voltage detection mouth P02; The other end is connected the negative pole of battery BT1, and capacitor C 2 is connected in parallel on the two ends of resistance R 10.
The beneficial effect of the utility model is: three-phase expense control intelligent electric energy meter external battery power circuit only uses an external battery; Cooperating the DC-DC booster circuit is that electric energy meter provides the power supply of checking meter that has a power failure; When having reduced the hardware cost of electric energy meter, also more meet the development trend of environmental protection.
Description of drawings
Fig. 1 takes the circuit theory diagrams of control intelligent electric energy meter external battery power circuit for the utility model three-phase.
Fig. 2 is the circuit connection diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
As shown in Figure 1; Present embodiment provides a kind of three-phase expense control intelligent electric energy meter external battery power circuit; Comprise detection of power loss unit, external battery control module, DC-DC boosting unit, external battery unit, battery voltage detection unit and single machine unit; Its said detection of power loss unit output terminal links to each other with the detection of power loss mouth of single machine unit; The detection of power loss mouth of single machine unit links to each other with the external battery control module, and the output terminal of external battery control module links to each other with the DC-DC boosting unit, and the external battery control module links to each other with the external battery unit; The external battery unit links to each other with the battery voltage detection unit, and the output terminal of battery voltage detection unit links to each other with the battery voltage detection mouth of single machine unit.
As shown in Figure 2, in the foregoing description, said detection of power loss unit comprises capacitor C 1, voltage reset chip IC1, switching transistor BG1 and resistance R 1 ~ resistance R 4; Wherein, capacitor C 1 is connected between voltage VDD and the GND, and reset 3 pin of chip IC1 of voltage are connected to voltage VDD; 2 pin of IC1 are connected to GND, and 1 pin of IC1 is connected to voltage VDD through resistance R 1, and 1 pin of IC1 is connected to 2 pin of BG1 through resistance R 2; 1 pin of BG1 is connected to GND; 2 pin of BG1 are connected to GND through resistance R 3, and 6 pin of BG1 are connected to voltage VCC through resistance R 4, and 6 pin of BG1 are connected to the detection of power loss mouth P01 of single machine unit.When the electric energy meter power down, the 6 pin output low level signals of BG1 are to the detection of power loss mouth P01 of single-chip microcomputer.
In the foregoing description, said external battery control circuit comprises switching transistor BG1, resistance R 5 ~ resistance R 8, diode D1 and FET Q1; Wherein, 5 pin of BG1 are connected to the detection of power loss mouth P01 of single machine unit through resistance R 5, and 4 pin of BG1 are connected to voltage VCC, and 3 pin of BG1 are connected to GND through resistance R 6; 3 pin of BG1 connect the negative pole of diode D1; The positive pole of diode D1 is connected to the grid G of FET Q1 through resistance R 8, and resistance R 7 is connected between the source S and grid G of FET Q1, and the drain D of FET is connected to the DC-DC boosting unit.
In the foregoing description, said DC-DC boosting unit comprises capacitor C 4, capacitor C 5, diode D2, voltage stabilizing diode D3 and step-up DC-DC conversion chip IC2; Wherein, the drain D of FET is connected to 3 pin of IC2 in the external battery control circuit, and 1 pin of IC2 is connected to GND; 2 pin of IC2 connect the negative pole of voltage stabilizing diode D3; The positive pole of voltage stabilizing diode D3 is connected to GND, and 2 pin of IC2 are the external battery voltage output, and 3 pin of IC2 are connected to 2 pin of IC2 through diode D2; Capacitor C 4 is connected in parallel between 3 pin and GND of IC2, and capacitor C 5 is connected in parallel on the two ends of voltage stabilizing diode D3.
In the foregoing description, in the said external battery unit, the positive pole of battery BT1 is connected to the source S of FET Q1 in the external battery control circuit, and the negative pole of battery BT1 is connected to GND, and capacitor C 3 is connected in parallel on the two ends of battery BT1.
In the foregoing description, said battery voltage detection unit comprises resistance R 9, resistance R 10 and capacitor C 2; Wherein, Resistance R 9 one ends are connected the positive pole of battery BT1, and the other end is connected to single-chip microcomputer battery voltage detection mouth P02, and resistance R 10 1 ends are connected to single-chip microcomputer battery voltage detection mouth P02; The other end is connected the negative pole of battery BT1, and capacitor C 2 is connected in parallel on the two ends of resistance R 10.
In the foregoing description, when the detection of power loss unit detected the power down of three-phase expense control intelligent electric energy meter, single-chip microcomputer detection of power loss mouth P01 was a low level signal; At this moment, the external battery control module starts, and makes FET Q1 conducting, thereby makes the work of DC-DC boosting unit, and the external battery cell voltage is boosted also voltage stabilizing to design effort voltage.
The content that this instructions is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (6)
1. a three-phase takes control intelligent electric energy meter external battery power circuit; Comprise detection of power loss unit, external battery control module, DC-DC boosting unit, external battery unit, battery voltage detection unit and single machine unit; It is characterized in that: said detection of power loss unit output terminal links to each other with the detection of power loss mouth of single machine unit; The detection of power loss mouth of single machine unit links to each other with the external battery control module; The output terminal of external battery control module links to each other with the DC-DC boosting unit; The external battery control module links to each other with the external battery unit, and the external battery unit links to each other with the battery voltage detection unit, and the output terminal of battery voltage detection unit links to each other with the battery voltage detection mouth of single machine unit.
2. three-phase according to claim 1 takes control intelligent electric energy meter external battery power circuit, it is characterized in that: said detection of power loss unit comprises capacitor C 1, voltage reset chip IC1, switching transistor BG1 and resistance R 1 ~ resistance R 4; Wherein, capacitor C 1 is connected between voltage VDD and the GND, and reset 3 pin of chip IC1 of voltage are connected to voltage VDD; 2 pin of IC1 are connected to GND, and 1 pin of IC1 is connected to voltage VDD through resistance R 1, and 1 pin of IC1 is connected to 2 pin of BG1 through resistance R 2; 1 pin of BG1 is connected to GND; 2 pin of BG1 are connected to GND through resistance R 3, and 6 pin of BG1 are connected to voltage VCC through resistance R 4, and 6 pin of BG1 are connected to the detection of power loss mouth P01 of single machine unit.
3. three-phase according to claim 1 takes control intelligent electric energy meter external battery power circuit, and it is characterized in that: said external battery control circuit comprises switching transistor BG1, resistance R 5 ~ resistance R 8, diode D1 and FET Q1; Wherein, 5 pin of BG1 are connected to the detection of power loss mouth P01 of single machine unit through resistance R 5, and 4 pin of BG1 are connected to voltage VCC, and 3 pin of BG1 are connected to GND through resistance R 6; 3 pin of BG1 connect the negative pole of diode D1; The positive pole of diode D1 is connected to the grid G of FET Q1 through resistance R 8, and resistance R 7 is connected between the source S and grid G of FET Q1, and the drain D of FET is connected to the DC-DC boosting unit.
4. three-phase according to claim 3 takes control intelligent electric energy meter external battery power circuit, and it is characterized in that: said DC-DC boosting unit comprises capacitor C 4, capacitor C 5, diode D2, voltage stabilizing diode D3 and step-up DC-DC conversion chip IC2; Wherein, the drain D of FET is connected to 3 pin of IC2 in the external battery control circuit, and 1 pin of IC2 is connected to GND; 2 pin of IC2 connect the negative pole of voltage stabilizing diode D3; The positive pole of voltage stabilizing diode D3 is connected to GND, and 2 pin of IC2 are the external battery voltage output, and 3 pin of IC2 are connected to 2 pin of IC2 through diode D2; Capacitor C 4 is connected in parallel between 3 pin and GND of IC2, and capacitor C 5 is connected in parallel on the two ends of voltage stabilizing diode D3.
5. three-phase according to claim 3 takes control intelligent electric energy meter external battery power circuit; It is characterized in that: in the said external battery unit; The positive pole of battery BT1 is connected to the source S of FET Q1 in the external battery control circuit; The negative pole of battery BT1 is connected to GND, and capacitor C 3 is connected in parallel on the two ends of battery BT1.
6. three-phase according to claim 5 takes control intelligent electric energy meter external battery power circuit, and it is characterized in that: said battery voltage detection unit comprises resistance R 9, resistance R 10 and capacitor C 2; Wherein, Resistance R 9 one ends are connected the positive pole of battery BT1, and the other end is connected to single-chip microcomputer battery voltage detection mouth P02, and resistance R 10 1 ends are connected to single-chip microcomputer battery voltage detection mouth P02; The other end is connected the negative pole of battery BT1, and capacitor C 2 is connected in parallel on the two ends of resistance R 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120219990U CN202149911U (en) | 2011-06-27 | 2011-06-27 | Power supply circuit of external battery for intelligent three-phase charge control electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120219990U CN202149911U (en) | 2011-06-27 | 2011-06-27 | Power supply circuit of external battery for intelligent three-phase charge control electric meter |
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| Publication Number | Publication Date |
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| CN202149911U true CN202149911U (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120219990U Expired - Lifetime CN202149911U (en) | 2011-06-27 | 2011-06-27 | Power supply circuit of external battery for intelligent three-phase charge control electric meter |
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| CN (1) | CN202149911U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855201A (en) * | 2012-09-12 | 2013-01-02 | 深圳市多尼卡电子技术有限公司 | Data recording device and power supply control circuit thereof |
| CN104678314A (en) * | 2015-02-11 | 2015-06-03 | 宁波三星电气股份有限公司 | Method for monitoring power consumption of energy meter battery |
| CN106252757A (en) * | 2016-09-05 | 2016-12-21 | 合肥飞鸟信息技术有限公司 | Battery pack balancing device |
-
2011
- 2011-06-27 CN CN201120219990U patent/CN202149911U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855201A (en) * | 2012-09-12 | 2013-01-02 | 深圳市多尼卡电子技术有限公司 | Data recording device and power supply control circuit thereof |
| CN102855201B (en) * | 2012-09-12 | 2015-02-04 | 深圳市多尼卡电子技术有限公司 | Data recording device and power supply control circuit thereof |
| CN104678314A (en) * | 2015-02-11 | 2015-06-03 | 宁波三星电气股份有限公司 | Method for monitoring power consumption of energy meter battery |
| CN106252757A (en) * | 2016-09-05 | 2016-12-21 | 合肥飞鸟信息技术有限公司 | Battery pack balancing device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120222 |