CN208112325U - The super capacitor application circuit of battery changeable type intelligent electric energy meter power supply - Google Patents
The super capacitor application circuit of battery changeable type intelligent electric energy meter power supply Download PDFInfo
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- CN208112325U CN208112325U CN201820753582.4U CN201820753582U CN208112325U CN 208112325 U CN208112325 U CN 208112325U CN 201820753582 U CN201820753582 U CN 201820753582U CN 208112325 U CN208112325 U CN 208112325U
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Abstract
This application involves a kind of intelligent electric energy meter more particularly to the super capacitor application circuits of battery changeable type intelligent electric energy meter power supply.Low in energy consumption, super capacitor is held time length.Including transformer T1, rectification circuit, voltage regulator circuit and sample circuit；It further include double super capacitor clock stand-by power supply circuits；Double super capacitor clock stand-by power supply circuits include clock chip, electric energy meter processing unit, counnter attack diode D5, super capacitor C6 and charge and discharge resistance R6；The clock chip includes main power source end Vcc2, backup power supply end Vcc1, chip selection signal end CE, data signal end I/O and communication clock signals SCLK；The main power source end Vcc2 is connect with voltage regulator circuit, and the backup power supply end Vcc1 is connect with the anode of counnter attack diode D5.The utility model will not be many to electric energy meter increased costs；Because the increased power consumption of this circuit is extremely low；Trickle-charge current very little extends the service life of super capacitor C4 and C6.
Description
Technical field
The utility model relates to the super of a kind of intelligent electric energy meter more particularly to battery changeable type intelligent electric energy meter power supply
Capacitance applications circuit.
Background technique
The clocking capability of intelligent electric energy meter is particularly significant, will affect the critical functions such as charging, logout, it is desirable that even if
Clock module must also work normally when power failure, use a lithium battery as clock standby electricity inside intelligent electric energy meter thus
Source, to ensure that clock module can work normally when having a power failure.But lithium battery long-time service can have passivation phenomenon, shorten the battery longevity
Life, therefore need replacing in use for some time.But original Intelligent electric energy meter clock battery is welded to electric energy meter circuit
On plate, therefore inconvenience is replaced, and replace battery to carry out in the power-off state.To solve single-phase intelligent electric energy meter clock electricity
Battery problems can not be replaced when pond is under-voltage, State Grid Metering Center, which takes the lead, has formulated the replaceable intelligent electric energy meter technical requirements of battery,
It not only improves battery fastening structure wherein in order to battery altering, while being the normal of clock module during guaranteeing battery altering
Work, it is desirable that super capacitor must be installed in electric energy meter, and carried out a surname to electric energy meter manufacturing enterprise in June, 2016 and passed through.
It is required that super capacitor is only clock power supply, and maintains the correct timing of clock at least 2 in electric energy meter power-off and battery undervoltage
It.State Grid Metering Center's testing process is：After electric energy meter loads 10min under the conditions of reference voltage, by clock of power meter and mark
Clock synchronization between punctual, further takes out Clock battery and electric energy meter is in the case where power-off, environment temperature are -40 DEG C, stands 2 days.By when
Clock battery puts back to electric energy meter battery compartment, and electric energy meter powers on, and 5s is not to be exceeded in clock of power meter and standard time relative error.It will be same
One intelligent electric energy meter repeats aforesaid operations in the case where environment temperature is 70 DEG C and meets to also require that.
Super capacitor charge and discharge electric line is simple, and without charging circuit as rechargeable battery, therefore current battery is replaceable
Clock backup power source is generally used in the external super capacitor of power output end and charge and discharge resistance in formula electric energy meter
Series circuit is realized.Using the advantages of this method it is that circuit realizes simple, but the disadvantage is that：
（1）Due to requiring electric energy meter to load electric energy meter power-off after a certain period of time under the conditions of reference voltage when detection,
During this period must be fully charged by super capacitor, this requires charging resistor must be as far as possible under the premise of super capacitor allows
It is small, to accelerate charging rate, and super capacitor relative to a big advantage of lithium battery be exactly its allow high current charge-discharge without
It can be damaged.But since charging resistor and discharge resistance are same resistance, this has resulted in its velocity of discharge also quickly, so that super
Grade capacitor is held time reduction.
（2）Under conditions of super capacitor performance reduces or has a power failure far more than 2 days, super capacitor is held time and is not able to satisfy
It is required that.
Utility model content
The utility model in view of the above problems, provide it is a kind of it is low in energy consumption, super capacitor holds time long battery can be more
Change the super capacitor application circuit of formula intelligent electric energy meter power supply.
The technical solution of the utility model is：Including transformer T1, rectification circuit, voltage regulator circuit and sample circuit；Also wrap
Include double super capacitor clock stand-by power supply circuits；
Double super capacitor clock stand-by power supply circuits include clock chip, electric energy meter processing unit, counnter attack diode
D5, super capacitor C6 and charge and discharge resistance R6；
The clock chip includes main power source end Vcc2, backup power supply end Vcc1, chip selection signal end CE, data signal end I/
O and communication clock signals SCLK；The main power source end Vcc2 is connect with voltage regulator circuit, the backup power supply end Vcc1 and counnter attack two
Pole pipe D5 anode connection, the chip selection signal end CE, data signal end I/O and communication clock signals SCLK respectively with electric energy meter
The corresponding end of processing unit connects；
The charge and discharge resistance R6 and sample circuit are in parallel, connect respectively with the cathode of the counnter attack diode D5；
The input terminal of the super capacitor C6 is connect with the output end of the charge and discharge resistance R6, and the super capacitor C6's is defeated
Outlet ground connection.
The clock chip uses DS1302 Low-power Clock Chip.
The rectification circuit includes rectifier V1, capacitor C1 and capacitor C2；
The primary input terminal of the transformer T1 connects 220V alternating current；Time of the input terminal and transformer T1 of the rectifier V1
Grade output end is connected；
The capacitor C1 and capacitor C2 are in parallel, and input terminal is connect with the third pin of the rectifier V1 respectively, defeated
Outlet is grounded respectively.
The voltage regulator circuit includes three terminal regulator U1, common-anode double diode D1, common-anode double diode D2, capacitor
C3, resistance R1 and super capacitor C4；
The first pin of the three terminal regulator U1 is connect with the output end of rectifier V1, and the of the three terminal regulator U1
Two pins are connect with the input terminal of common-anode double diode D1, the output end ground connection of the common-anode double diode D1；
The common-anode double diode D2 and capacitor C3 are in parallel；
The electrode input end of the capacitor C3 is connect with the third pin of three terminal regulator U1, and the cathode of the capacitor C3 is defeated
Outlet ground connection；
The third pin of the common-anode double diode D2 is connect with the third pin of three terminal regulator U1；
The resistance R1 and super capacitor C4 are sequentially connected in series, the input terminal of the resistance R1 and the common-anode double diode
The first pin of D2 connects, the output end ground connection of the super capacitor C4.
The input terminal of the capacitor C1 is equipped with detection circuit；
The detection circuit includes resistance R4 and resistance R5；The input terminal of the resistance R4 and the common-anode double diode
The second pin of D2 connects；The input terminal of the resistance R5 is connect with the output end of resistance R4, the output termination of the resistance R5
Ground；
The electric energy meter processing unit is connected between resistance R4 and resistance R5.
The sample circuit includes common-cathode dual-diode D3, diode D4, Clock battery, resistance R2, resistance R3 and electricity
Hold C5；
The first pin of the common-cathode dual-diode D3 is connect with the first pin of the common-anode double diode D2, institute
The third pin for stating common-cathode dual-diode D3 is connect with electric energy meter processing unit, the cathode output end of the diode D4 also with
The input terminal of the connection of electric energy meter processing unit, the diode D4 accesses 5.7V voltage；
One end of the resistance R3 and the anode of battery connect, and the other end is connect with electric energy meter processing unit；The capacitor
One end of C5 is connect with electric energy meter processing unit, other end ground connection；One end of the resistance R2 is connect with electric energy meter processing unit,
Other end ground connection；The cathode of the battery is grounded；The second pin of the common-cathode dual-diode D3 is connected to resistance R3 and electricity
Between pond.
The duration for extending clock backup power source in the utility model, using double super capacitor clock backup power sources
Circuit.On the basis of existing single super capacitor clock stand-by power supply circuit, as shown in Fig. 2, in power supply V B and common cathode double two
Increase circuit as shown in Figure 1 between 1 end of pole pipe D3.The circuit is by clock chip DS1302, electric energy meter processing unit, counnter attack
Diode D5, super capacitor C6, charge and discharge resistance R6 composition.Meanwhile by the V DC power supply in Fig. 2 after resistance R4 and R5 partial pressure
Power transmission energy list processing unit detection, to determine whether electric energy meter powers off.
The circuit has following characteristic:（1）Since DS1302 is a general, cheap clock chip, and electric energy
Table quantity is very big, and 100,000 or more easily, therefore price is very low when volume procurement DS1302, therefore will not increase to electric energy meter cost
Add very much；（2）Original power consumption is just very low when DS1302 works, and operating current is less than 300nA when 2V, keeps data and clock information
When power consumption be less than 1mW.Due to not using clock function at that time in the utility model, do not need to keep data and clock information yet,
Not external crystal oscillator is for generating clock.Meanwhile it being configured in trickle charge register of the electric energy meter processing unit to DS1302
Afterwards, without being communicated between electric energy meter processing unit and DS1302.Therefore, because the increased power consumption of this circuit is extremely low.（3）Fig. 2
In, when electric energy meter works normally, VCC power supply is provided by the output 5.7V of three terminal regulator U1, therefore to super capacitor C4 and C6
Aging effects very little.When Clock battery is under-voltage, power supply all is provided by super capacitor C4 and C6 after electric energy meter power-off.Full
Under the premise of sufficient power consumption, ammeter processing unit configures DS=10 of trickle charge register, RS=11 select two two poles
Pipe, selection resistance R3=8K Ω, charge circuit resistance is big, therefore trickle-charge current very little, extends super capacitor C4 and C6
Service life.
Detailed description of the invention
Fig. 1 is double super capacitor clock stand-by power supply circuit figures of the utility model；
Fig. 2 is single super capacitor clock stand-by power supply circuit figure；
Fig. 3 is the circuit structure diagram of the utility model；
Fig. 4 is the operating circuit of DS1302 clock chip；
Fig. 5 is DS1302 clock chip internal structure chart；
Fig. 6 is trickle charge power circuit diagram inside DS1302 clock chip；
It is input shift LD that POWER CONTROL, which is power control, INPUT SHIFT REGISTERS, in figure
Device, COMMAND AND CONTROL LOGLC be command and control system, REAL TIME CLOCK be real-time clock,
1 OF, 16 SELECT is 16 to select 1, NOTE:1010 ENABLES CHARGER of ONLY is to pay attention to：Only 1010
Can charging, 1 OF, 2 SELECT be 2 select 1,1 OF, 3 SELECT be 3 select 1,
TCS=TRICKLE CHARGER SELECT be TCS=trikle charger selection,
DS=DIODE SELECT be DS=diode selecting,
ROUT=RESISTOR SELECT is ROUT=resistor selection.
Specific embodiment
The utility model as shown in figures 1 to 6, including transformer T1, rectification circuit, voltage regulator circuit and sample circuit；Its feature
It is, further includes double super capacitor clock stand-by power supply circuits；
Double super capacitor clock stand-by power supply circuits include clock chip, electric energy meter processing unit（That is CPU）, counnter attack
Diode D5, super capacitor C6 and charge and discharge resistance R6；
The clock chip includes main power source end Vcc2, backup power supply end Vcc1, chip selection signal end CE, data signal end I/
O and communication clock signals SCLK；The main power source end Vcc2 is connect with voltage regulator circuit, the backup power supply end Vcc1 and counnter attack two
Pole pipe D5 anode connection, the chip selection signal end CE, data signal end I/O and communication clock signals SCLK respectively with electric energy meter
The corresponding end of processing unit connects；
The charge and discharge resistance R6 and sample circuit are in parallel, connect respectively with the cathode of the counnter attack diode D5；
The input terminal of the super capacitor C6 is connect with the output end of the charge and discharge resistance R6, and the super capacitor C6's is defeated
Outlet ground connection.
The clock chip uses DS1302 Low-power Clock Chip.
The shortcomings that overcome the above clock of power meter backup power source, the utility model are released using U.S. DALLAS company
Low-power consumption real-time timepiece chip DS1302 with trickle current charging ability, makes full use of its dual power supply and internal programmable tiny stream
The advantage of thin electric current charging circuit, a kind of double super capacitor clock backup power sources of utility model increase pole in cost and power consumption
The duration of clock backup power source is substantially prolonged in its limited situation.
DS1302 is the low-power consumption real-time clock core with trickle current charging ability released by DALLAS company of the U.S.
Piece.DS1302 be DALLAS company of the U.S. release a kind of high-performance, low-power consumption, the real time clock circuit with RAM, it can be with
To year, month, day, week, when, minute, second carry out timing, have the function of leap year compensation, operating voltage is 2.0V~5.5V.DS1302 is mentioned
Main power source, backup power supply dual power supply pin are supplied, wherein Vcc2 is main power source, and VCC1 is backup power supply, while being provided to rear
The ability of stand-by power source progress trickle current charging.In the case where main power source is closed, it is also able to maintain the continuous operation of clock.
DS1302 is powered by the greater in Vcc1 or Vcc2 the two.When Vcc2 is greater than Vcc1+0.2V, powered by Vcc2.Work as Vcc2
When less than Vcc1, powered by Vcc1.
Fig. 4 is DS1302 clock chip exemplary operation circuit.Wherein, CE is chip selection signal, and I/O is data
Signal, SCLK are communication clock signals, and X1, X2 are crystal oscillation signal.Fig. 3 is DS1302 clock chip internal structure
Figure.As seen from the figure, mainly include inside DS1302 oscillating circuit module, data storage RAM, order and control logic module,
Input shift register and energy supply control module.
For the utility model, it is important that energy supply control module.Wherein, most important to be exactly, the inside modules
Containing a special register-trickle charge register, by being programmed to the register, so that it may whether determining charging
And the size of charging current.So trickle charge register determines the charge characteristic of DS1302, Fig. 6 is DS1302 clock
Chip interior trickle charge power circuit diagram.
Wherein, TCS is that trickle charge selects position, and DS is diode selecting position, and RS is resistance selection position.When TCS=1010
When, enable trickle charge；When TCS is other, forbid trickle charge.Without trickle charge when DS1302 clock chip just powers on,
Electric energy list processing is needed to carry out being initially configured as trickle charge mode to TCS.If DS=01, a diode is selected；If DS
=10, then select two diodes；If DS=00 or 11, even if TCS=1010, charge function is also prohibited.If RS=01 selects
Resistance R1=2K Ω；If RS=10, resistance R2=4K Ω is selected；If RS=11, resistance R3=8K Ω is selected；RS≠00.RS and DS
It is to be determined by the maximum charging current of external VCC1 and VCC2.
The rectification circuit includes rectifier V1, capacitor C1 and capacitor C2；
The primary input terminal of the transformer T1 connects 220V alternating current；Time of the input terminal and transformer T1 of the rectifier V1
Grade output end is connected；
The capacitor C1 and capacitor C2 are in parallel, and input terminal is connect with the third pin of the rectifier V1 respectively, defeated
Outlet is grounded respectively.
The voltage regulator circuit includes three terminal regulator U1, common-anode double diode D1, common-anode double diode D2, capacitor
C3, resistance R1 and super capacitor C4；
The first pin of the three terminal regulator U1 is connect with the output end of rectifier V1, and the of the three terminal regulator U1
Two pins are connect with the input terminal of common-anode double diode D1, the output end ground connection of the common-anode double diode D1；
The common-anode double diode D2 and capacitor C3 are in parallel；
The electrode input end of the capacitor C3 is connect with the third pin of three terminal regulator U1, and the cathode of the capacitor C3 is defeated
Outlet ground connection；
The third pin of the common-anode double diode D2 is connect with the third pin of three terminal regulator U1；
The resistance R1 and super capacitor C4 are sequentially connected in series, the input terminal of the resistance R1 and the common-anode double diode
The first pin of D2 connects, the output end ground connection of the super capacitor C4.
The input terminal of the capacitor C1 is equipped with detection circuit；
The detection circuit includes resistance R4 and resistance R5；The input terminal of the resistance R4 and the common-anode double diode
The second pin of D2 connects；The input terminal of the resistance R5 is connect with the output end of resistance R4, the output termination of the resistance R5
Ground；
The electric energy meter processing unit is connected between resistance R4 and resistance R5.
The sample circuit includes common-cathode dual-diode D3, diode D4, Clock battery, resistance R2, resistance R3 and electricity
Hold C5；
The first pin of the common-cathode dual-diode D3 is connect with the first pin of the common-anode double diode D2, institute
The third pin for stating common-cathode dual-diode D3 is connect with electric energy meter processing unit, the cathode output end of the diode D4 also with
The input terminal of the connection of electric energy meter processing unit, the diode D4 accesses 5.7V voltage；
One end of the resistance R3 and the anode of battery connect, and the other end is connect with electric energy meter processing unit；The capacitor
One end of C5 is connect with electric energy meter processing unit, other end ground connection；One end of the resistance R2 is connect with electric energy meter processing unit,
Other end ground connection；The cathode of the battery is grounded；The second pin of the common-cathode dual-diode D3 is connected to resistance R3 and electricity
Between pond.
As shown in Fig. 2, existing common clock of power meter backup power source.Network voltage accesses after transformer T1 isolated buck
The input terminal of rectification module V1, the input terminal of the DC voltage V DC access three terminal regulator U1 of rectification module V1 output, three ends
The ground terminal of voltage-stablizer is grounded by common-anode double diode D1, and the output voltage of three terminal regulator is made to be lifted to 5.7V.Three ends
The anode of the output voltage 5.7V access common-anode double diode D2 of voltage-stablizer, one of cathode of double diode D2 output voltage
VDD works for circuits such as the communication modules of electric energy meter, and another cathode output voltage V B access common-cathode dual-diode D3 is wherein
One anode tap, double diode D3 another anode termination Clock battery anode, double diode D3 cathode output with
The main and auxiliary power supply of electric energy meter processing unit CPU is collectively formed through the output of diode D4 by 5.7V, and clock of power meter is built in CPU
Clock.Resistance R2, R3 and capacitor C5 constitute the decompression sample circuit of Clock battery, and CPU judges Clock battery by the sampled value
It is whether under-voltage.When clock battery undervoltage, alarm signal can be exported in electric energy meter processing unit, so as to instantaneously changing clock electricity
Pond.
The utility model is, counnter attack diode D5, super capacitor C6, charge and discharge resistance R6 are formed.Meanwhile by the V in Fig. 1
DC power supply send CPU to detect after resistance R4 and R5 partial pressure, to determine whether electric energy meter powers off.
Double super capacitor clock stand-by power supply circuit working principles that the utility model uses are as follows：Electric energy meter initial power-on
When, CPU is as follows to the trickle charge register configuration of clock chip DS1302：TCS=1010, DS=01, RS=01, i.e., enabled tiny stream
Current charge, one diode of selection, selection resistance R1=2K Ω, in order to carry out quick charge to super capacitor C6.Due to
It has included a diode in the trickle charging circuit of DS1302, to guarantee that super capacitor C6 charges to voltage as high as possible,
Diode D5 should select forward conduction voltage model as small as possible.When electric energy meter power-off, because of the effect of storage capacitor C1, figure
The output voltage of three terminal regulator U1 can be gradually reduced as 0V in 2.Settable threshold voltage is 9V, when CPU detects that V DC is small
When 9V, it is believed that electric energy meter has powered off, but the working power VCC of CPU is still within normal operating conditions, therefore CPU at this time
Low power consumpting state is not entered also, therefore CPU configures rapidly DS=10 of trickle charge register, RS=11 select two two poles
Pipe, selection resistance R3=8K Ω.When the output voltage of three terminal regulator U1 is 0, if Clock battery is also at under-voltage shape at this time
State, then the clock module of electric energy meter is powered by super capacitor C4 and C6 completely.When super capacitor C6 voltage drops to certain value,
Super capacitor C4 can supplement energy to it by trickle charging circuit, to substantially prolong holding time for clock module, protect
The accuracy of electric energy meter timing is demonstrate,proved.
The circuit has following characteristic:（1）Since DS1302 is a general, cheap clock chip, and electric energy
Table quantity is very big, and 100,000 or more easily, therefore price is very low when volume procurement DS1302, therefore will not increase to electric energy meter cost
Add very much；（2）Original power consumption is just very low when DS1302 works, and operating current is less than 300nA when 2V, keeps data and clock information
When power consumption be less than 1mW.Due to not using clock function at that time in the utility model, do not need to keep data and clock information yet,
Not external crystal oscillator is for generating clock.Meanwhile carry out in trickle charge register of the CPU to DS1302 with postponing, CPU with
Without being communicated between DS1302.Therefore, because the increased power consumption of this circuit is extremely low.（3）In Fig. 1, when electric energy meter works normally,
VCC power supply is provided by the output 5.7V of three terminal regulator U1, therefore to the aging effects very little of super capacitor C4 and C6.In clock
When battery undervoltage, power supply all is provided by super capacitor C4 and C6 after electric energy meter power-off.Under the premise of meeting power consumption, CPU matches
DS=10 of trickle charge register is set, RS=11 select two diodes, selection resistance R3=8K Ω, charge circuit resistance
Greatly, therefore trickle-charge current very little, the service life of super capacitor C4 and C6 is extended.
Claims (6)
1. the super capacitor application circuit of battery changeable type intelligent electric energy meter power supply, including transformer T1, rectification circuit, pressure stabilizing
Circuit and sample circuit；It is characterized in that, further including double super capacitor clock stand-by power supply circuits；
Double super capacitor clock stand-by power supply circuits include clock chip, electric energy meter processing unit, counnter attack diode D5, surpass
Grade capacitor C6 and charge and discharge resistance R6；
The clock chip include main power source end Vcc2, backup power supply end Vcc1, chip selection signal end CE, data signal end I/O and
Communication clock signals SCLK；The main power source end Vcc2 is connect with voltage regulator circuit, the backup power supply end Vcc1 and two pole of counnter attack
The anode connection of pipe D5, the chip selection signal end CE, data signal end I/O and communication clock signals SCLK are respectively and at electric energy meter
Manage the corresponding end connection of unit；
The charge and discharge resistance R6 and sample circuit are in parallel, connect respectively with the cathode of the counnter attack diode D5；
The input terminal of the super capacitor C6 is connect with the output end of the charge and discharge resistance R6, the output end of the super capacitor C6
Ground connection.
2. the super capacitor application circuit of battery changeable type intelligent electric energy meter power supply according to claim 1, feature
It is, the clock chip uses DS1302 Low-power Clock Chip.
3. the super capacitor application circuit of battery changeable type intelligent electric energy meter power supply according to claim 1, feature
It is, the rectification circuit includes rectifier V1, capacitor C1 and capacitor C2；
The primary input terminal of the transformer T1 connects 220V alternating current；The input terminal of the rectifier V1 and the secondary of transformer T1 are defeated
Outlet is connected；
The capacitor C1 and capacitor C2 are in parallel, and input terminal is connect with the third pin of the rectifier V1 respectively, output end
It is grounded respectively.
4. the super capacitor application circuit of battery changeable type intelligent electric energy meter power supply according to claim 3, feature
It is, the voltage regulator circuit includes three terminal regulator U1, common-anode double diode D1, common-anode double diode D2, capacitor C3, electricity
Hinder R1 and super capacitor C4；
The first pin of the three terminal regulator U1 is connect with the output end of rectifier V1, and the second of the three terminal regulator U1 is drawn
Foot is connect with the input terminal of common-anode double diode D1, the output end ground connection of the common-anode double diode D1；
The common-anode double diode D2 and capacitor C3 are in parallel；
The electrode input end of the capacitor C3 is connect with the third pin of three terminal regulator U1, the cathode output end of the capacitor C3
Ground connection；
The third pin of the common-anode double diode D2 is connect with the third pin of three terminal regulator U1；
The resistance R1 and super capacitor C4 are sequentially connected in series, and the input terminal of the resistance R1 is with the common-anode double diode D2's
The connection of first pin, the output end ground connection of the super capacitor C4.
5. the super capacitor application circuit of battery changeable type intelligent electric energy meter power supply according to claim 4, feature
It is, the input terminal of the capacitor C1 is equipped with detection circuit；
The detection circuit includes resistance R4 and resistance R5；The input terminal of the resistance R4 is with the common-anode double diode D2's
Second pin connection；The input terminal of the resistance R5 is connect with the output end of resistance R4, the output end ground connection of the resistance R5；
The electric energy meter processing unit is connected between resistance R4 and resistance R5.
6. the super capacitor application circuit of battery changeable type intelligent electric energy meter power supply according to claim 4, feature
It is, the sample circuit includes common-cathode dual-diode D3, diode D4, Clock battery, resistance R2, resistance R3 and capacitor
C5；
The first pin of the common-cathode dual-diode D3 is connect with the first pin of the common-anode double diode D2, described total
The third pin of cathode double diode D3 is connect with electric energy meter processing unit, the cathode output end of the diode D4 also with electric energy
The input terminal of the connection of list processing unit, the diode D4 accesses 5.7V voltage；
One end of the resistance R3 and the anode of battery connect, and the other end is connect with electric energy meter processing unit；The capacitor C5's
One end is connect with electric energy meter processing unit, other end ground connection；One end of the resistance R2 is connect with electric energy meter processing unit, another
End ground connection；The cathode of the battery is grounded；The second pin of the common-cathode dual-diode D3 be connected to resistance R3 and battery it
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820753582.4U CN208112325U (en) | 2018-05-18 | 2018-05-18 | The super capacitor application circuit of battery changeable type intelligent electric energy meter power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820753582.4U CN208112325U (en) | 2018-05-18 | 2018-05-18 | The super capacitor application circuit of battery changeable type intelligent electric energy meter power supply |
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| CN201820753582.4U Withdrawn - After Issue CN208112325U (en) | 2018-05-18 | 2018-05-18 | The super capacitor application circuit of battery changeable type intelligent electric energy meter power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429332A (en) * | 2018-05-18 | 2018-08-21 | 扬州万泰电子科技有限公司 | A kind of super capacitor application circuit of battery changeable type intelligent electric energy meter power supply |
| CN115032881A (en) * | 2022-05-23 | 2022-09-09 | 国网河北省电力有限公司邯郸市肥乡区供电分公司 | Electric power acquisition terminal |
-
2018
- 2018-05-18 CN CN201820753582.4U patent/CN208112325U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429332A (en) * | 2018-05-18 | 2018-08-21 | 扬州万泰电子科技有限公司 | A kind of super capacitor application circuit of battery changeable type intelligent electric energy meter power supply |
| WO2019218882A1 (en) * | 2018-05-18 | 2019-11-21 | 扬州万泰电子科技有限公司 | Super-capacitor application circuit of replaceable battery type smart electric energy meter power supply |
| CN115032881A (en) * | 2022-05-23 | 2022-09-09 | 国网河北省电力有限公司邯郸市肥乡区供电分公司 | Electric power acquisition terminal |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181116 Effective date of abandoning: 20200501 |