CN206250837U - The freewheeling circuit of intelligent electric meter and its wireless communication module - Google Patents
The freewheeling circuit of intelligent electric meter and its wireless communication module Download PDFInfo
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- CN206250837U CN206250837U CN201621408356.XU CN201621408356U CN206250837U CN 206250837 U CN206250837 U CN 206250837U CN 201621408356 U CN201621408356 U CN 201621408356U CN 206250837 U CN206250837 U CN 206250837U
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- circuit
- communication module
- wireless communication
- intelligent electric
- electric meter
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Abstract
A kind of freewheeling circuit of intelligent electric meter and its wireless communication module, the freewheeling circuit is made up of main power source unit, battery management unit, ultracapacitor and boosting unit；Wherein, external power source supply is sent to the input of the main power source unit and the battery management unit simultaneously, and the battery management unit is used to charge the ultracapacitor；The ultracapacitor carries out boosting treatment when the input terminal voltage of the main power source unit is less than given threshold by the boosting unit, for the input of the main power source unit provides afterflow energy.The utility model is able to ensure that the reliability service of the wireless communication module of intelligent electric meter.
Description
Technical field
The utility model is related to intelligent electric meter, more particularly, to the power-supply system of intelligent electric meter.
Background technology
In intelligent electric meter system, wireless telecommunications are widely used.Intelligent electric meter generally includes power supply, metering with
Processing module and communication module.For the situation for supporting wireless telecommunications, communication module can be the nothing for supporting GPRS, 3G, LTE etc.
Line communication module.The load capacity of the power supply of the intelligent electric meter of different manufacturers is uneven, and some power supplies are defeated
The power for going out cannot meet existing wireless communication module normal communication needed for power, this can to intelligent electric meter communication modes
Bring limitation.However, the scene application of intelligent electric meter, often needs to use wireless communication mode.Therefore, real be necessary to intelligence
The power-supply system of energy ammeter is improved.
Utility model content
Technical problem to be solved in the utility model is to overcome the shortcomings of existing for above-mentioned prior art, and proposes one
Plant the freewheeling circuit of the wireless communication module of intelligent electric meter, it can be ensured that the reliability service of the wireless communication module of intelligent electric meter.
The utility model proposes a kind of freewheeling circuit of the wireless communication module of intelligent electric meter for above-mentioned technical problem, should
Freewheeling circuit is made up of main power source unit, battery management unit, ultracapacitor and boosting unit；Wherein, external power source supply
The input of the main power source unit and the battery management unit is sent to simultaneously, and the battery management unit is used for the ultracapacitor
Charge；The ultracapacitor is risen when the input terminal voltage of the main power source unit is less than given threshold by the boosting unit
Pressure treatment, for the input of the main power source unit provides afterflow energy.
In certain embodiments, the main power source unit is mainly made up of DC transfer circuit and switch of power supply output；Wherein,
The DC transfer circuit converts chip U1 by DC-DC and its peripheral circuit is constituted, and the switch of power supply output is by metal-oxide-semiconductor Q1 and its outward
Enclose circuit composition.
In certain embodiments, the peripheral circuit of metal-oxide-semiconductor Q1 includes NPN triode Q2, the current collection of NPN triode Q2
Pole is connected with the grid of metal-oxide-semiconductor Q1, the grounded emitter of NPN triode Q2, and the base stage connection one of NPN triode Q2 makes
Can signal.
In certain embodiments, the battery management unit is mainly made up of battery management chip U2 and its peripheral circuit.
In certain embodiments, the boosting unit is mainly made up of DC transfer circuit and switch of power supply output；Wherein, should
DC transfer circuit converts chip U3 by DC-DC and its peripheral circuit is constituted, and the switch of power supply output is by metal-oxide-semiconductor Q3 and its periphery
Circuit is constituted.
In certain embodiments, the peripheral circuit of metal-oxide-semiconductor Q3 includes NPN triode Q4, the current collection of NPN triode Q4
Pole is connected with the grid of metal-oxide-semiconductor Q3, the grounded emitter of NPN triode Q4, and it is outer that the base stage of NPN triode Q3 connects this
Portion's power supply supply.
In certain embodiments, the normal value of external power source supply is+12V, and the given threshold is+8.5V.
In certain embodiments, the ultracapacitor is lithium ion super capacitor.
In certain embodiments, the supply voltage of the ultracapacitor is+3.6V.
The utility model also proposes a kind of intelligent electric meter, including wireless telecommunications mould as described above for above-mentioned technical problem
The freewheeling circuit of block.
Compared with prior art, the freewheeling circuit of the wireless communication module of intelligent electric meter of the present utility model, by ingenious
Ground main power source unit, battery management circuit, ultracapacitor and booster circuit are constituted, can for wireless communication module is provided can
The afterflow leaned on such that it is able to ensure the reliability service of the wireless communication module of intelligent electric meter.
Brief description of the drawings
Fig. 1 is the circuit block diagram of intelligent electric meter of the present utility model.
Fig. 2 is the electrical schematic diagram of main power source unit in freewheeling circuit of the present utility model.
Fig. 3 is the electrical schematic diagram of battery management unit in freewheeling circuit of the present utility model.
Fig. 4 is the electrical schematic diagram of boosting unit in freewheeling circuit of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawing of this specification, further elaboration is given to preferred embodiment of the present utility model.
Referring to Fig. 1, Fig. 1 is the circuit block diagram of intelligent electric meter of the present utility model.The utility model proposes a kind of intelligence electricity
Table 100, it includes：Power supply 10, freewheeling circuit 20 and wireless communication module 30.It is appreciated that the power supply 10 with
The freewheeling circuit 20 collectively forms the power-supply system of the intelligent electric meter 100.The freewheeling circuit 20 obtains electricity from the power supply 10
Source supplies PWR_IN, and for the wireless communication module 30 provides power supply supply PWR_OUT.In the present embodiment, the wireless telecommunications
Module 30 is 3G communication modules.
Specifically, the freewheeling circuit 20 is by main power source unit 1, battery management unit 2, ultracapacitor 3 and boosting unit 4
Composition.External power source supply PWR_IN is sent to the input of the main power source unit 1 and the battery management unit 2 simultaneously.The battery
Administrative unit 2 is used to charge the ultracapacitor 3.Input terminal voltage of the ultracapacitor 3 in the main power source unit 1（
That is external power source supply PWR_IN）During less than given threshold, boosting treatment is carried out by the boosting unit 4, be the main power source list
The input of unit 1 provides afterflow energy（Ensure that external power source supply PWR_IN is not less than the given threshold）.In the present embodiment
In, the normal value of external power source supply PWR_IN is+12V, and the given threshold is+8.5V.The power supply supply PWR_OUT for+
3.8V。
It is understood that being that relevant circuit is powered on intelligent electric meter 100 by the main power source unit 1 under normal circumstances；
When wireless communication module 30 needs communication, it is necessary to provide enough power by the main power source unit 1, if main power source unit 1
Not enough, the voltage of power supply supply PWR_IN will fall below the situation of given threshold to the power of offer, at this point it is possible to pass through
Ultracapacitor 3 is powered.Ultracapacitor 3 raises voltage by boosting unit 4 to supply the defeated of the main power source unit 1
Enter end such that it is able to realize afterflow, it is ensured that the normal work of wireless communication module 30.Battery management unit 2 is used for the super electricity
Container 3 is charged.In the present embodiment, it is that supplement power supply is done using ultracapacitor 3, for example：From lithium ion super
Capacitor；In other embodiments, it would however also be possible to employ rechargeable battery does supplement power supply, for example：From Li-Ion rechargeable battery.
Referring to Fig. 2, Fig. 2 is the electrical schematic diagram of main power source unit in freewheeling circuit of the present utility model.The main power source unit 1
It is main a DC transfer circuit that chip U1 and its peripheral circuit constitute to be converted by DC-DC and by metal-oxide-semiconductor Q1 and its peripheral circuit
The switch of power supply output for constituting is constituted.
The operation principle of the main power source unit 1 is generally comprised：Input voltage+12V（Normal value）, core is converted by DC-DC
Piece U1, the suitable voltage needed for being converted into system.Wherein, electric capacity EC4, C4, C5 and C6 constitutes the energy storage and filtering of input side.Electricity
Resistance R3, R5 are provided with the minimum operating voltage of DC-DC conversion chip U1 jointly, in the present embodiment, the minimum operating voltage for+
8.5V.Electric capacity C1 is the start-up capacitance of DC-DC conversion chips U1.Electric capacity C3, C7 and resistance R4 play frequency compensation effect.Inductance
L2 is energy storage inductor.Diode D2 is fly-wheel diode.Electric capacity EC1, EC2, EC3, CP1, C2 constitute the energy storage and filter of outlet side
Ripple.Resistance R1 and light emitting diode D3 play power supply instruction effect.Resistance R6, R7, R9 constitute backfeed loop, for setting DC-
The output voltage of DC conversion chips U1.
When deadlock phenomenon occurs in the intelligent electric meter 100, hard reset can be carried out by button S1 and electric capacity C10.Or,
The order sent by MCU, control EN ports, carries out warm reset.When the base stage of NPN triode Q2 receives high level signal,
NPN triode Q2 is turned on, and the colelctor electrode of NPN triode Q2 is changed into low level.At this moment, shape between the source electrode and grid of metal-oxide-semiconductor Q1
Into the pressure difference of about 3V, metal-oxide-semiconductor Q1 conductings, the main power source unit 1 can be subordinate's circuit（For example：Wireless communication module 30）There is provided
+ 3.8V power supplys are supplied.
Referring to Fig. 3, Fig. 3 is the electrical schematic diagram of battery management unit in freewheeling circuit of the present utility model.The battery management
Unit 2 is mainly made up of battery management chip U2 and its peripheral circuit.
The operation principle of the battery management unit 2 is generally comprised：Input voltage+12V（Normal value）, it is the battery management core
Piece U2 powers, and when this supply voltage is effective, resistance R11, R13 charge to ultracapacitor BAT1, and it is left that charging current is about 50mA
It is right.Resistance R16 is thermistor, the temperature for perceiving ultracapacitor BAT1.Resistance R19 is used to set the battery management core
The enable port of piece U2.Resistance R15 is grounded, and the joint number and charging voltage of object are electrically charged for setting.Resistance R18 and electric capacity
C19 constitutes voltage loop compensation.Resistance R17 and electric capacity C17 constitutes current loop compensation.Resistance R11 is in parallel with resistance R13, altogether
With setting charging current.Inductance L3 is energy storage inductor.Electric capacity C16 is start-up capacitance.
Referring to Fig. 4, Fig. 4 is the electrical schematic diagram of boosting unit in freewheeling circuit of the present utility model.The boosting unit 4 is main
A DC transfer circuit and be made up of metal-oxide-semiconductor Q3 and its peripheral circuit that chip U3 and its peripheral circuit constitute are converted by DC-DC
A switch of power supply output constitute.
The operation principle of the boosting unit 4 is generally comprised：When the power output of the requirement of wireless communication module 30, main power source list
When unit 1 cannot individually meet fully loaded power supply, ultracapacitor 3, can be by the capacitor supply voltage of 3.6V by boosting unit 4
VBAT_3.6 is increased to+8.5V, and the input for main power source unit 1 is used.Specifically, electric capacity EC5, EC6, EC7 and EC8 is used
In energy storage filtering.Resistance R20 sets the switching frequency of DC-DC conversion chips U3.Electric capacity C20 is start-up capacitance.Resistance R22 is adjusted
Switch peak current.Resistance R24 meets capacitor supply voltage VBAT_3.6, is enabled for ensureing that DC-DC conversion chips U3 is in
State.Electric capacity C24, C25, R25 play frequency compensation effect.Resistance R21, R23, R26 constitute backfeed loop, are exported for setting
Voltage.When the base stage of NPN triode Q4 is high level, Q4 conductings, the source electrode and grid of metal-oxide-semiconductor Q3 form the pressure difference of about 3V, MOS
Pipe Q3 is turned on, if the now input voltage of main power source unit 1（It is normally 12V）Higher than 8.5V, then main power source unit 1 is powered, and two
Pole pipe D7 is used to prevent from pouring in down a chimney；If the input voltage of main power source unit 1 is less than 8.5V, diode D7 conductings, ultracapacitor 3
The input of the main power source unit 1 can be transferred its energy to by boosting unit 4.
Compared with prior art, the freewheeling circuit 20 of the wireless communication module of intelligent electric meter of the present utility model, by skilful
Constituted with main power source unit 1, battery management circuit 2, ultracapacitor 3 and booster circuit 4 wonderfully, can be wireless communication module
30 provide reliable afterflow such that it is able to ensure the reliability service of the wireless communication module 30 of intelligent electric meter 100.
The above is only preferred embodiment of the present utility model, is not intended to limit embodiment of the present utility model,
Those of ordinary skill in the art can very easily carry out corresponding accommodation according to central scope of the present utility model and spirit
Or modification, therefore protection domain of the present utility model should be defined by the protection domain required by claims.
Claims (10)
1. a kind of freewheeling circuit of the wireless communication module of intelligent electric meter, it is characterised in that the freewheeling circuit by main power source unit,
Battery management unit, ultracapacitor and boosting unit composition；Wherein, external power source supply simultaneously be sent to the main power source unit and
The input of the battery management unit, the battery management unit is used to charge the ultracapacitor；The ultracapacitor is at this
The input terminal voltage of main power source unit carries out boosting treatment when being less than given threshold by the boosting unit, is the main power source unit
Input provide afterflow energy.
2. according to the intelligent electric meter described in claim 1 wireless communication module freewheeling circuit, it is characterised in that the main power source
Unit is mainly made up of DC transfer circuit and switch of power supply output；Wherein, the DC transfer circuit is by DC-DC conversion chips U1
And its peripheral circuit is constituted, the switch of power supply output is made up of metal-oxide-semiconductor Q1 and its peripheral circuit.
3. according to the intelligent electric meter described in claim 2 wireless communication module freewheeling circuit, it is characterised in that the metal-oxide-semiconductor
The peripheral circuit of Q1 includes NPN triode Q2, and the colelctor electrode of NPN triode Q2 is connected with the grid of metal-oxide-semiconductor Q1, the NPN
The grounded emitter of triode Q2, the base stage connection one of NPN triode Q2 enables signal.
4. according to the intelligent electric meter described in claim 1 wireless communication module freewheeling circuit, it is characterised in that the cell tube
Reason unit is mainly made up of battery management chip U2 and its peripheral circuit.
5. according to the intelligent electric meter described in claim 1 wireless communication module freewheeling circuit, it is characterised in that the boosting list
Unit is mainly made up of DC transfer circuit and switch of power supply output；Wherein, the DC transfer circuit by DC-DC convert chip U3 and
Its peripheral circuit is constituted, and the switch of power supply output is made up of metal-oxide-semiconductor Q3 and its peripheral circuit.
6. according to the intelligent electric meter described in claim 5 wireless communication module freewheeling circuit, it is characterised in that the metal-oxide-semiconductor
The peripheral circuit of Q3 includes NPN triode Q4, and the colelctor electrode of NPN triode Q4 is connected with the grid of metal-oxide-semiconductor Q3, the NPN
The grounded emitter of triode Q4, the base stage of NPN triode Q3 connects external power source supply.
7. according to the intelligent electric meter described in claim 1 wireless communication module freewheeling circuit, it is characterised in that the external electrical
The normal value of source supply is+12V, and the given threshold is+8.5V.
8. according to the intelligent electric meter described in any one of claim 1 to 7 wireless communication module freewheeling circuit, its feature exists
In the ultracapacitor is lithium ion super capacitor.
9. according to the intelligent electric meter described in claim 8 wireless communication module freewheeling circuit, it is characterised in that the super electricity
The supply voltage of container is+3.6V.
10. a kind of intelligent electric meter, it is characterised in that continuous including the wireless communication module as described in any one of claim 1 to 9
Current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621408356.XU CN206250837U (en) | 2016-12-21 | 2016-12-21 | The freewheeling circuit of intelligent electric meter and its wireless communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621408356.XU CN206250837U (en) | 2016-12-21 | 2016-12-21 | The freewheeling circuit of intelligent electric meter and its wireless communication module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206250837U true CN206250837U (en) | 2017-06-13 |
Family
ID=59007987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621408356.XU Active CN206250837U (en) | 2016-12-21 | 2016-12-21 | The freewheeling circuit of intelligent electric meter and its wireless communication module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206250837U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968453A (en) * | 2017-11-22 | 2018-04-27 | 张国东 | A kind of internal battery operated type fire hydrant instrument and method for managing power supply and system |
| CN107979128A (en) * | 2017-11-22 | 2018-05-01 | 张国东 | A kind of built-in display screen formula fire hydrant instrument and method for managing power supply |
| CN114268146A (en) * | 2021-12-07 | 2022-04-01 | 成都长城开发科技有限公司 | Power supply device and method for electronic instrument in low-temperature environment |
-
2016
- 2016-12-21 CN CN201621408356.XU patent/CN206250837U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968453A (en) * | 2017-11-22 | 2018-04-27 | 张国东 | A kind of internal battery operated type fire hydrant instrument and method for managing power supply and system |
| CN107979128A (en) * | 2017-11-22 | 2018-05-01 | 张国东 | A kind of built-in display screen formula fire hydrant instrument and method for managing power supply |
| CN114268146A (en) * | 2021-12-07 | 2022-04-01 | 成都长城开发科技有限公司 | Power supply device and method for electronic instrument in low-temperature environment |
| CN114268146B (en) * | 2021-12-07 | 2024-02-13 | 成都长城开发科技股份有限公司 | Power supply device and method for electronic instrument in low-temperature environment |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee after: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. Address before: 611731 no.1218, Hezuo Road, high tech Zone (West District), Chengdu, Sichuan Province Patentee before: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee after: Chengdu Great Wall Development Technology Co.,Ltd. Address before: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee before: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |