CN207937526U - Power-fail detection circuit on charging pile - Google Patents
Power-fail detection circuit on charging pile Download PDFInfo
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- CN207937526U CN207937526U CN201721758415.0U CN201721758415U CN207937526U CN 207937526 U CN207937526 U CN 207937526U CN 201721758415 U CN201721758415 U CN 201721758415U CN 207937526 U CN207937526 U CN 207937526U
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- resistance
- power supply
- power
- connect
- electronic switch
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model is related to power-fail detection circuits on a kind of charging pile, solve the deficiencies in the prior art, and technical solution is：Including power supply monitoring module and electronic switch, the first end of the power supply monitoring module connects input power, and the second end of the power supply monitoring module connects microcontroller, and the third end of the power supply monitoring module connects electronic switch；The first end of the electronic switch is connected with backup power supply, the second end of the electronic switch is connected with system power supply, the anode of the diode D1 is connect with input power and power supply monitoring module, the cathode of the diode D1 is connect with system power supply and electronic switch, it is described enter diode D2 anode connect with input power, the cathode of the diode D2 is connected with stand-by power supply.
Description
Technical field
This patent is related to the detection circuit on charging pile, and in particular to power-fail detection circuit on a kind of charging pile.
Background technology
With the development and the improvement of people's living standards of national economy technology, resident for environmental protection consciousness also by
Step enhancing, therefore electric vehicle increasingly has been favored by people.With the increase of electric vehicle, electric automobile charging pile makes
With also increasingly popularizing.Charging pile needs to handle many user data and letter in real time as charging service, the equipment for charging of swiping the card
Breath, and when power-down conditions occur suddenly, the case where many data just will appear loss, it is therefore necessary to fall in charging pile
A power-off signal can be provided when electrification rapidly, the data for making microcontroller energy timely processing current prevent from bringing to company
Loss.
Utility model content
Utility model aims to solve the above-mentioned prior arts with the increase of electric vehicle, electric automobile charging pile
Use also increasingly popularize.Charging pile as charging service, the equipment for charging of swiping the card, need to handle in real time many user data and
The problem of information, and when power-down conditions occur suddenly, the case where many data just will appear loss, is provided on a kind of charging pile
Power-fail detection circuit.
Technical solution adopted by the utility model to solve its technical problems is：Power-fail detection circuit on a kind of charging pile,
It is characterized in that：Including power supply monitoring module and electronic switch, the first end of the power supply monitoring module connects input power, institute
The second end connection microcontroller of power supply monitoring module is stated, the third end of the power supply monitoring module connects electronic switch；It is described
The first end of electronic switch is connected with backup power supply, and the second end of the electronic switch is connected with system power supply, two poles
The anode of pipe D1 is connect with input power and power supply monitoring module, cathode and system power supply and the electronics of the diode D1
Switch connection, it is described enter diode D2 anode connect with input power, the cathode of the diode D2 is connected with stand-by power supply.
Present invention employs electronic switches, and backup power supply can control to power to system power supply, and electronic switch can prevent backup power supply from existing
Power down speed is influenced when input power power down, guarantee faster detects external power supply power-off signal.Present invention employs two
Pole pipe D1 and diode D2 ensures the one-way only operation after normal power supply and power down, prevents the voltage of backup power supply is counter to be poured into input
Power supply influences the power down speed of input power.
Preferably, the power supply monitoring module includes chip U1, resistance R4, resistance R5, resistance R7, capacitance C1, resistance
R8, resistance R6, NPN triode Q3, resistance R3 and resistance R2；The 2nd foot of the chip U1 and resistance R5, resistance R7 and capacitance
The first end of C1 connects, and the 3rd foot and ground of the chip U1 connect, the 1st foot and resistance R6 and resistance R8 of the chip U1
First end connects, and the second end of the resistance R5 is connect with input power, and the second end of the resistance R7 is connected to ground, the electricity
The second end for holding C1 is connected to ground, and the second end of the resistance R8 is connected to ground, the second end and NPN triode of the resistance R6
The base stage of Q3 connects, and the emitter of the NPN triode Q3 is connected to ground, collector and resistance R2, the electricity of the NPN triode
R3 and resistance R4 connections are hindered, the second end of the resistance R2 and the digital power of 3.3v connect, the second end of the resistance R3
The I/O mouths of microcontroller are connected to, the chip U1 is power supply monitoring chip R3111H421C.
Preferably, the electronic switch includes the of NPN triode Q2, resistance R1 and PMOS tube Q1, the resistance R4
Two ends are connect with the base stage of NPN triode Q2, and the emitter of the NPN triode Q2 is connected to ground, the NPN triode Q2's
Collector is connect with the grid of resistance R1 and PMOS tube Q1, the second end and backup power supply and PMOS tube Q1 of the resistance R1
Source electrode connection, the drain electrode of the PMOS tube Q1 connects with system power supply.
The substantial effect of the utility model is：The power monitoring chip R3111H421C that power supply monitoring module uses can be fast
Speed provides power-off signal to microcontroller, is conducive to the preservation of data after power down, while power supply monitoring module can be automatically controled electricity
Sub switch；Electronic switch is used, backup power supply can control to power to system power supply, electronic switch can prevent backup power supply from existing
Power down speed is influenced when input power power down, guarantee faster detects external power supply power-off signal.Use diode D1
With diode D2, ensures the one-way only operation after normal power supply and power down, prevent the voltage of backup power supply is counter to be poured into input power, shadow
Ring the power down speed to input power.
Description of the drawings
Fig. 1 the principle of the present invention schematic diagrames
The circuit diagram of Fig. 2 present invention.
Specific implementation mode
Below by specific embodiment, and in conjunction with attached drawing, the technical solution of the utility model is made further specifically
It is bright.
Embodiment 1：
Power-fail detection circuit on a kind of charging pile（Referring to attached drawing 1 and attached drawing 2）, including power supply monitoring module and electronic cutting
It closes, the first end of the power supply monitoring module connects input power, and the second end of the power supply monitoring module connects microcontroller,
The third end of the power supply monitoring module connects electronic switch；The first end of the electronic switch is connected with backup power supply, described
The second end of electronic switch is connected with system power supply, anode and input power and the power supply monitoring module of the diode D1
Connection, the cathode of the diode D1 connect with system power supply and electronic switch, it is described enter diode D2 anode and input
Power supply connects, and the cathode of the diode D2 is connected with stand-by power supply.The power supply monitoring module include chip U1, resistance R4,
Resistance R5, resistance R7, capacitance C1, resistance R8, resistance R6, NPN triode Q3, resistance R3 and resistance R2；The 2nd of the chip U1
Foot is connect with the first end of resistance R5, resistance R7 and capacitance C1, and the 3rd foot and ground of the chip U1 connect, the chip U1
The 1st foot connected with resistance R6 and resistance R8 first ends, the second end of the resistance R5 is connect with input power, the resistance
The second end of R7 is connected to ground, and the second end of the capacitance C1 is connected to ground, and the second end of the resistance R8 is connected to ground, described
The second end of resistance R6 is connect with the base stage of NPN triode Q3, and the emitter of the NPN triode Q3 is connected to ground, the NPN
The collector of triode is connect with resistance R2, resistance R3 and resistance R4, the second end of the resistance R2 and the number electricity of 3.3v
Source connects, and the second end of the resistance R3 is connected to the I/O mouths of microcontroller, and the chip U1 is power supply monitoring chip
R3111H421C。
The electronic switch includes NPN triode Q2, resistance R1 and PMOS tube Q1, the second end and NPN of the resistance R4
The base stage of triode Q2 connects, and the emitter of the NPN triode Q2 is connected to ground, the collector of the NPN triode Q2 with
The grid of resistance R1 and PMOS tube Q1 connect, and the second end and the source electrode of backup power supply and PMOS tube Q1 of the resistance R1 connect
It connects, the drain electrode of the PMOS tube Q1 is connected with system power supply.
Input voltage VIN exports after resistance R5, resistance R7 partial pressures to the 2nd foot of power supply monitoring chip U1, capacitance C1
Energy storage filter action is played, prevents from reporting power-off signal by mistake when input voltage shakiness, when the 2nd foot voltage of U1 is higher than threshold voltage,
The 1st foot of U1 exports high level, and when the 2nd foot voltage of U1 is less than threshold voltage, the 1st foot of U1 can export low level, U1's
Output signal can control the base stage of triode Q3, and the collector of triode Q3 controls the base stage of triode Q2 by resistance R4,
The collector of triode Q2 can control the grid of PMOS tube Q1.Therefore when VIN voltage reduces, triode Q3 can become from conducting
Cut-off, I/O mouthfuls of level become high from low, and microcontroller can detect that power-off signal, triode Q2 can become to be connected from cut-off,
PMOS tube Q1 can also become to be connected from cut-off, and backup power supply V_BACK can provide voltage and work to system power supply.
The present embodiment power supply monitoring module use power monitoring chip R3111H421C can quickly provide power-off signal to
Microcontroller is conducive to the preservation of data after power down, while power supply monitoring module can be automatically controled electronic switch；Use electronics
Switch, can control backup power supply to power to system power supply, and electronic switch can prevent backup power supply shadow in input power power down
Power down speed is rung, guarantee faster detects external power supply power-off signal.Diode D1 and diode D2 are used, is ensured just
One-way only operation after often power supply and power down, prevents the voltage of backup power supply is counter to be poured into input power, influences falling for input power
Electric speed.
Embodiment described above is a kind of preferable scheme of the utility model, is not made to the utility model any
Formal limitation, on the premise of not exceeding the technical scheme recorded in the claims also other variations and modifications.
Claims (3)
1. power-fail detection circuit on a kind of charging pile, it is characterised in that：Including power supply monitoring module and electronic switch, the power supply
The first end of monitoring modular connects input power, and the second end of the power supply monitoring module connects microcontroller, the power supply prison
The third end for surveying module connects electronic switch；The first end of the electronic switch is connected with backup power supply, the electronic switch
Second end is connected with system power supply, and the anode of diode D1 is connect with input power and power supply monitoring module, the diode
The cathode of D1 is connect with system power supply and electronic switch, and the anode of diode D2 is connect with input power, the diode D2
Cathode connected with stand-by power supply.
2. power-fail detection circuit on charging pile according to claim 1, it is characterised in that：The power supply monitoring module includes
Chip U1, resistance R4, resistance R5, resistance R7, capacitance C1, resistance R8, resistance R6, NPN triode Q3, resistance R3 and resistance R2；
The 2nd foot of the chip U1 is connect with the first end of resistance R5, resistance R7 and capacitance C1, the 3rd foot and ground of the chip U1
Connection, the 1st foot of the chip U1 are connected with resistance R6 and resistance R8 first ends, second end and the input electricity of the resistance R5
Source connects, and the second end of the resistance R7 is connected to ground, and the second end of the capacitance C1 is connected to ground, and the second of the resistance R8
End is connected to ground, and the second end of the resistance R6 is connect with the base stage of NPN triode Q3, the emitter of the NPN triode Q3
It being connected to ground, the collector of the NPN triode is connect with resistance R2, resistance R3 and resistance R4, and the second of the resistance R2
End is connect with the digital power of 3.3v, and the second end of the resistance R3 is connected to the I/O mouths of microcontroller, and the chip U1 is electricity
Source monitors chip R3111H421C.
3. power-fail detection circuit on charging pile according to claim 1, it is characterised in that：The electronic switch includes NPN
Triode Q2, resistance R1 and PMOS tube Q1, the second end of the resistance R4 are connect with the base stage of NPN triode Q2, the NPN tri-
The emitter of pole pipe Q2 is connected to ground, and the collector of the NPN triode Q2 is connect with the grid of resistance R1 and PMOS tube Q1,
The second end of the resistance R1 is connected with the source electrode of backup power supply and PMOS tube Q1, the drain electrode of the PMOS tube Q1 and system electricity
Source connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721758415.0U CN207937526U (en) | 2017-12-15 | 2017-12-15 | Power-fail detection circuit on charging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721758415.0U CN207937526U (en) | 2017-12-15 | 2017-12-15 | Power-fail detection circuit on charging pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207937526U true CN207937526U (en) | 2018-10-02 |
Family
ID=63646333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721758415.0U Active CN207937526U (en) | 2017-12-15 | 2017-12-15 | Power-fail detection circuit on charging pile |
Country Status (1)
| Country | Link |
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| CN (1) | CN207937526U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530420A (en) * | 2019-07-11 | 2019-12-03 | 重庆泰升生态农业发展有限公司 | A kind of room environment monitoring system |
-
2017
- 2017-12-15 CN CN201721758415.0U patent/CN207937526U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530420A (en) * | 2019-07-11 | 2019-12-03 | 重庆泰升生态农业发展有限公司 | A kind of room environment monitoring system |
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