CN207067361U - A kind of low-power consumption battery voltage supervisory circuit - Google Patents
A kind of low-power consumption battery voltage supervisory circuit Download PDFInfo
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- CN207067361U CN207067361U CN201720891730.4U CN201720891730U CN207067361U CN 207067361 U CN207067361 U CN 207067361U CN 201720891730 U CN201720891730 U CN 201720891730U CN 207067361 U CN207067361 U CN 207067361U
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Abstract
The utility model provides a kind of low-power consumption battery voltage supervisory circuit, including resistance R4, resistance R25, resistance R29 R31, metal-oxide-semiconductor Q3, triode Q4 and electric capacity C35, metal-oxide-semiconductor Q3 source electrode connection cell voltage VCC, drain electrode is sequentially connected in series resistance R30 and resistance R31, resistance R30 connects Chip Microcomputer A/D sampling pin with resistance R31 dividing point, resistance R31 meets GND, electric capacity C35 one end connection dividing point, another termination GND；Metal-oxide-semiconductor Q3 grid difference connecting triode Q4 colelctor electrode and resistance R25 one end, resistance R25 another termination VIN ends；Triode Q4 base stage connects resistance R29 and resistance R4 respectively, the I/O port of resistance R29 connection single-chip microcomputers, and resistance R4 and triode Q4 emitter stage meet GND.The utility model solves the problems, such as that resistor current consumption is big, low in energy consumption, extends the service life of instrument.
Description
Technical field
It the utility model is related to battery powered intelligent meter field, more particularly to a kind of low-power consumption battery voltage monitoring electricity
Road.
Background technology
With the lifting that China is information-based, intelligent and technicalization is horizontal, intelligent metering technology is in water meter, ammeter, combustion
Application in gas meter, calorimeter is also more and more extensive.China is to intelligent electric meter, intellectual water meter, intelligent gas meter, intelligence at present
Can the research and building-up work of calorimeter progress energetically.With the continuous quickening of power network process of reform, intelligent electric meter in China
Large-scale popularization is obtained, the application of intellectual water meter, gas meter, flow meter and calorimeter is also more and more extensive.
Lithium battery is widely used in intelligence instrument at present, because intelligence instrument is generally all in low power consumpting state, is disappeared
Consume the electric current of very little, and battery voltage supervisory circuit of the prior art is connected using two precision resistances, resistance can produce compared with
Big current drain, substantially reduce the service life of battery powered instrument.
Utility model content
To overcome the deficiencies in the prior art, the utility model provides a kind of low-power consumption battery voltage supervisory circuit, solves
The problem of resistor current consumption is big, it is low in energy consumption, extend the service life of instrument.
The utility model uses following technical scheme：
A kind of low-power consumption battery voltage supervisory circuit, wherein, including resistance R4, resistance R25, resistance R29, resistance R30, electricity
R31, metal-oxide-semiconductor Q3, triode Q4 and electric capacity C35, metal-oxide-semiconductor Q3 source electrode connection cell voltage VCC are hindered, drain electrode is sequentially connected in series resistance
R30 and resistance R31, resistance R30 connect Chip Microcomputer A/D sampling pin with resistance R31 dividing point VOL_M, and resistance R31 meets GND,
Electric capacity C35 one end connection dividing point VOL_M, another termination GND；Metal-oxide-semiconductor Q3 grid difference connecting triode Q4 current collection
Pole and resistance R25 one end, resistance R25 another termination VIN ends；Triode Q4 base stage connects resistance R29 and resistance respectively
The I/O port of R4, resistance R29 connection single-chip microcomputer, resistance R4 and triode Q4 emitter stage meet GND.
Preferably, the triode Q4 is MMBT5551 triodes.
Preferably, the metal-oxide-semiconductor Q3 is AO3415.
The beneficial effects of the utility model are as follows：
The utility model is applied to battery powered intellectual water meter, intelligent gas meter or intelligent calorimeter, for supervising in real time
The dump energy situation of supplying cell is surveyed, back-stage management is uploaded to according to monitoring result and then progress Valve controlling or by state
System, so that manager grasps the power information of measuring instrument.The utility model uses metal-oxide-semiconductor and triode, due to usual
In the case of, metal-oxide-semiconductor and triode are in cut-off state, and in cut-off state, leakage current is very small, can be ignored,
The power consumption of measurement potential circuit is so reduced, extends the service life of instrument.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and obtained in the specification, claims and accompanying drawing write.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of battery voltage supervisory circuit in the prior art.
Fig. 2 is a kind of circuit theory diagrams of low-power consumption battery voltage supervisory circuit of the utility model.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
As shown in figure 1, battery voltage supervisory circuit includes resistance R6 and resistance R8 in the prior art, resistance R6 and R8 is equal
30.1K Europe, two precision resistance R6 and resistance R8 are connected, then cell voltage interface VCC is connected to R6, passes through simultaneously
Fixed pull down resistor R8 is connected to GND, and cell voltage VCC is after R6 and R8 according to a certain percentage partial pressure, by dividing point VOL_M
Chip Microcomputer A/D sampling pin is connected to, analog voltage is converted into digital value, finally obtained by certain proportion algorithm actual
VCC values.
The circuit can produce larger current drain because resistance R6 and resistance R8 is always present in circuit, this
To being fatal using battery powered instrument, the service life of its instrument is greatly reduced.
As shown in Fig. 2 the utility model provides a kind of low-power consumption battery voltage supervisory circuit, including resistance R4, resistance
R25, resistance R29, resistance R30, resistance R31, metal-oxide-semiconductor Q3, triode Q4 and electric capacity C35, metal-oxide-semiconductor Q3 source electrode connection battery electricity
VCC is pressed, drain electrode is sequentially connected in series resistance R30 and resistance R31, and resistance R30 connects Chip Microcomputer A/D with resistance R31 dividing point VOL_M
Pin is sampled, resistance R31 meets GND, electric capacity C35 one end connection dividing point VOL_M, another termination GND；Metal-oxide-semiconductor Q3 grid
Connecting triode Q4 colelctor electrode and resistance R25 one end respectively, resistance R25 another termination VIN ends；Triode Q4 base stage
Connection resistance R29 and resistance R4 respectively, the I/O port of resistance R29 connection single-chip microcomputers, resistance R4 and triode Q4 emitter stage are equal
Meet GND.
Cell voltage VCC is first connected to metal-oxide-semiconductor Q3 source electrode, and metal-oxide-semiconductor Q3 drain electrode connect again two precision resistance R30 and
R31, dividing point VOL_M is connected to Chip Microcomputer A/D sampling pin；Metal-oxide-semiconductor Q3 grid is connected to triode Q4 current collection simultaneously
Pole, while triode Q4 base stage MVM is connected to the I/O port of single-chip microcomputer.When if necessary to gather cell voltage, single-chip microcomputer
It is high level to put MVM, and at this moment triode Q4 is turned on, thus colelctor electrode is changed into low level, so metal-oxide-semiconductor Q3 is turned on, due to metal-oxide-semiconductor
Conduction voltage drop is very low, can be ignored, therefore resistance R30 and R31 both end voltage are equal to cell voltage；It need not usually gather
When cell voltage, MVM is low level, and triode Q4 is in cut-off state, so its current collection extremely high level, and then MOS
Pipe Q3 is also at cut-off state.
Because under normal conditions, metal-oxide-semiconductor Q3 and triode Q4 leak electricity in cut-off state in cut-off state
Stream is very small, can be ignored, and so reduces the power consumption of measurement potential circuit, extends the service life of instrument.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (3)
- A kind of 1. low-power consumption battery voltage supervisory circuit, it is characterised in that：Including resistance R4, resistance R25, resistance R29, resistance R30, resistance R31, metal-oxide-semiconductor Q3, triode Q4 and electric capacity C35, metal-oxide-semiconductor Q3 source electrode connection cell voltage VCC, drain electrode are gone here and there successively Connection resistance R30 and resistance R31, resistance R30 and resistance R31 dividing point VOL_M connect Chip Microcomputer A/D sampling pin, resistance R31 Meet GND, electric capacity C35 one end connection dividing point VOL_M, another termination GND；Metal-oxide-semiconductor Q3 grid difference connecting triode Q4 Colelctor electrode and resistance R25 one end, resistance R25 another termination VIN ends；Triode Q4 base stage connects resistance R29 respectively With resistance R4, the I/O port of resistance R29 connection single-chip microcomputers, resistance R4 and triode Q4 emitter stage meet GND.
- A kind of 2. low-power consumption battery voltage supervisory circuit according to claim 1, it is characterised in that：The triode Q4 is MMBT5551 triodes.
- A kind of 3. low-power consumption battery voltage supervisory circuit according to claim 1, it is characterised in that：The metal-oxide-semiconductor Q3 is AO3415。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720891730.4U CN207067361U (en) | 2017-07-21 | 2017-07-21 | A kind of low-power consumption battery voltage supervisory circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720891730.4U CN207067361U (en) | 2017-07-21 | 2017-07-21 | A kind of low-power consumption battery voltage supervisory circuit |
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| Publication Number | Publication Date |
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| CN207067361U true CN207067361U (en) | 2018-03-02 |
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| CN201720891730.4U Active CN207067361U (en) | 2017-07-21 | 2017-07-21 | A kind of low-power consumption battery voltage supervisory circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188064A (en) * | 2018-09-26 | 2019-01-11 | 郑州云海信息技术有限公司 | A kind of electric voltage observation circuit and voltage monitor |
| CN114137424A (en) * | 2021-11-29 | 2022-03-04 | 深圳市太美亚电子科技有限公司 | Battery power detection circuit |
-
2017
- 2017-07-21 CN CN201720891730.4U patent/CN207067361U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188064A (en) * | 2018-09-26 | 2019-01-11 | 郑州云海信息技术有限公司 | A kind of electric voltage observation circuit and voltage monitor |
| CN114137424A (en) * | 2021-11-29 | 2022-03-04 | 深圳市太美亚电子科技有限公司 | Battery power detection circuit |
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