CN106980065A - A kind of leakage monitoring device for automobile charging pile - Google Patents
A kind of leakage monitoring device for automobile charging pile Download PDFInfo
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- CN106980065A CN106980065A CN201710329606.3A CN201710329606A CN106980065A CN 106980065 A CN106980065 A CN 106980065A CN 201710329606 A CN201710329606 A CN 201710329606A CN 106980065 A CN106980065 A CN 106980065A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The present invention relates to electric control technical field, a kind of more particularly to leakage monitoring device for automobile charging pile, it is used to the electric leakage signal received being sent to the A types electric leakage monitoring unit 200 including A types electric leakage sensing unit 300, the optocoupler driving output unit 700 is resent to after the A types electric leakage enhanced processing of monitoring unit 200；The DC leakage monitoring unit 500 is used to the direct current signal received being sent to the absolute value rectification unit 600, and the optocoupler is resent to after being handled through the absolute value of absolute value rectification unit 600 and drives output unit 700.The present apparatus is multiple functional, simple in construction, not only reduces the cost of production and processing, and have very high guarantee to the safety that automobile charges.
Description
Technical field
The present invention relates to electric control technical field, more particularly to a kind of leakage monitoring device for automobile charging pile.
Background technology
Country is supported that electric automobile electric automobile is greatly developed, automobile charging pile equipment energetically at present
Equally also in fast development, but it is due to domestic charging pile only band AC or A type earth leakage protectives, is protected without DC leakage, when
Electrical equipment produces DC leakage, equally can produce harm to equipment and the person.In consideration of it, being badly in need of a kind of collection A types and once-through type
Detection of electrical leakage reduces the generation of security incident in the monitoring device of one.
The content of the invention
It is an object of the invention to overcome above-mentioned problem of the prior art, there is provided a kind of electric leakage for automobile charging pile
Monitoring device, the electric leakage AC electric leakages of electrical equipment, the electric leakage of A types and DC leakage situation can be monitored in real time, can when there is leakage-current alarm
Equipment is checked in time, hidden danger is excluded, realizes that automotive safety charges.
Above-mentioned purpose is to be achieved through the following technical solutions：
A kind of leakage monitoring device for automobile charging pile, including step-down rectifier unit 100, A types electric leakage monitoring unit 200, A
Type electric leakage sensing unit 300, dual power supply boosting unit 400, DC leakage monitoring unit 500, absolute value rectification unit 600, light
Coupling drives output unit 700 and rectification circuit；The rectification circuit includes four lines, respectively L1, L2, L3 and N；The decompression is whole
Stream unit 100 is connected with the rectification circuit, is converted voltage to first voltage and is respectively sent to the A types electric leakage monitoring unit
200 and the dual power supply boosting unit 400, first voltage reprocessing is second voltage point by the dual power supply boosting unit 400
Do not export to the DC leakage monitoring unit 500 and the absolute value rectification unit 600；The A types electric leakage sensing unit 300
For the electric leakage signal received to be sent into the A types electric leakage monitoring unit 200, by A types electric leakage monitoring unit 200
The optocoupler driving output unit 700 is resent to after enhanced processing；The DC leakage monitoring unit 500 is used to receive
Direct current signal be sent to the absolute value rectification unit 600, through the absolute value of absolute value rectification unit 600 handle after pass again
Deliver to the optocoupler driving output unit 700.
Further, the step-down rectifier unit 100 include piezo-resistance RV, the 4th resistance R4, the 5th resistance R5 and by
The bridge rectifier that first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 are constituted；It is described
First diode D1 negative electrode and the second diode D2 negative electrode connection as bridge rectifier first end, described the
Three diode D3 anode and the 4th diode D4 anode connection as bridge rectifier the second end, described second
Diode D2 anode and the 4th diode D4 negative electrode connection as bridge rectifier the 3rd end, the described 1st
Pole pipe D1 anode and the 3rd diode D3 negative electrode connect the 4th end as bridge rectifier；4th resistance
R4 and the 5th resistance R5 and the bridge rectifier first end are connected in series；One end of the piezo-resistance RV and the bridge
The 4th end connection of formula rectification circuit, the other end is connected with the rectification circuit L3.
Further, the step-down rectifier unit 100 also includes the 4th electric capacity C4 and voltage-regulator diode Q2, the 4th electricity
The anode for holding C4 is connected with the output end of the 5th resistance R5, the negative electrode of the voltage-regulator diode Q2 and the 4th electric capacity C4
Anode output end connection, the anode of the voltage-regulator diode Q2 and the 4th electric capacity C4 negative electrode, bridge rectifier electricity
Second end on road connects and is grounded.
Further, the A types electric leakage monitoring unit 200 includes A type detection of electrical leakage chips U1, the 6th electric capacity C6 and the 5th
Electric capacity C5；The A types detection of electrical leakage chip U1 includes eight pins, the first pin VSS and the 4th pin VSS ground connection, and second draws
Pin IN1 and the 3rd pin IN2 is used for the electric leakage signal for receiving the A types electric leakage sensing unit 300, the 5th pin OS and the light
Coupling driving output unit 700 is connected, and is grounded by the 3rd electric capacity C3, and the 6th pin DIy is grounded by the 6th electric capacity C6, the 7th
Pin OA is grounded by the 5th electric capacity C5, and the 8th pin VDD is connected with the first end of the bridge rectifier.
Further, the A types detection of electrical leakage chip U1 is FM2147.
Further, the A types electric leakage sensing unit 300 includes key switch S1, zero sequence current mutual inductor ZCT, first
Resistance R1, second resistance R2,3rd resistor R3, the 6th resistance R6, the 7th resistance R7, the first electric capacity C1, the 5th diode D5 and
6th diode D6；The leakage current sensed is input to the A by the zero sequence current mutual inductor ZCT by second resistance R2
The type detection of electrical leakage chip U1 second pin IN1, is input to the A types detection of electrical leakage chip U1's by 3rd resistor R3
The 3rd pin IN2, between the zero sequence current mutual inductor ZCT and the second resistance R2 and 3rd resistor R3 successively simultaneously
Connection is connected with the first electric capacity C1 that can be filtered to leakage current, leakage current is converted to the first electricity of voltage signal
R1 and the 5th diode D5 and the 6th diode D6 in opposite direction are hindered, the zero sequence current mutual inductor ZCT's is another
One end is connected with the key switch S1, the 6th resistance R6, the 7th resistance R7, and the other end connection of the key switch S1 is described
Rectification circuit L3.
Further, between the second resistance R2 and the A types detection of electrical leakage chip U1 second pin IN1, institute
The second electric capacity C2 is connected in parallel between the 3rd pin IN2 for stating 3rd resistor R3 and the A types detection of electrical leakage chip U1.
Further, the DC leakage monitoring unit 500 is Hall direct current instrument transformer, and the leakage current sensed is led to
Cross the 3rd pin to export to the absolute value rectification unit 600, the absolute value rectification unit 600 is by the negative voltage received
Upset claims equivalent positive voltage signal to export to optocoupler driving output unit 700.
Further, the optocoupler driving output unit 700 includes the one or four end photoelectrical coupler U4 and the two or four end light
Electric light electric coupler U5；The anode of one or the four end photoelectrical coupler U4 is connected with the absolute value rectification unit 600, negative electrode
It is grounded by the 13rd resistance R13, colelctor electrode is connected with 5V voltages, emitter stage is grounded by the 14th resistance R14, and passes through the
The ten outside output voltages of diode D10；The anode of two or the four end photoelectrical coupler U5 and A types electric leakage monitoring unit
200 the 5th pin OS connections, negative electrode is grounded by the 15th resistance R15, and colelctor electrode is connected with 5V voltages, and emitter stage passes through
16 resistance R16 are grounded, and pass through the outside output voltages of enneode D9.
Beneficial effect
A kind of leakage monitoring device for automobile charging pile that the present invention is provided, A types are detected using A type detection of electrical leakage chips
The electric leakage output of function；Realize that DC leakage is detected using a kind of Hall direct current instrument transformer, when sensing has direct current in transformer
Electric leakage signal passes through, and transformer output OUTPUT ends can export a voltage signal, because direct current is directive, so defeated
The voltage signal gone out is also likely to be negative signal, and we can not be detected, so passing through absolute value circuit again, by negative voltage signal
The positive voltage signal of same amplitude is converted into, then two kinds of detection outputs are merged together by optocoupler and double diode again, made
Output voltage signal is changed into standard 5V voltages there is provided monolithic machine testing is given, to realize the earth leakage protective with A+6mA functions.This
Apparatus function is complete, simple in construction, not only reduces the cost of production and processing, and have very high guarantor to the safety that automobile charges
Barrier.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of leakage monitoring device for automobile charging pile of the present invention.
Embodiment
The present invention is described in further detail with reference to figure and embodiment.
Step-down rectifier unit 100 is connected with the rectification circuit, is converted voltage to first voltage and is respectively sent to the A
Type electric leakage monitoring unit 200 and the dual power supply boosting unit 400.Specifically, step-down rectifier unit 100 includes piezo-resistance
RV, the 4th resistance R4, the 5th resistance R5 and by the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode
The bridge rectifier that D4 is constituted；First diode D1 negative electrode and the second diode D2 negative electrode connection are used as bridge-type
The anode connection of the first end of rectification circuit, the 3rd diode D3 anode and the 4th diode D4 is used as bridge rectifier electricity
The negative electrode connection at second end on road, the second diode D2 anode and the 4th diode D4 is used as the 3rd of bridge rectifier
The negative electrode at end, the first diode D1 anode and the 3rd diode D3 connects the 4th end as bridge rectifier；4th electricity
The first end of resistance R4 and the 5th resistance R5 and bridge rectifier is connected in series；Piezo-resistance RV one end and the bridge rectifier
The three-terminal link of circuit, the other end is connected with rectification circuit L3.Voltage is changed into 5V by voltage by bridge rectifier, is passed through
5th resistance R5 one end exports the 8th pin VDD of the monitoring unit 200 that leaked electricity to dual power supply boosting unit 400 and A types respectively.
Step-down rectifier unit 100 also includes the 4th electric capacity C4 and voltage-regulator diode Q2, the 4th electric capacity C4 anode and the 5th resistance R5's
Output end is connected, and voltage-regulator diode Q2 negative electrode is connected with the 4th electric capacity C4 anode output end, voltage-regulator diode Q2 anode
Second end of negative electrode, bridge rectifier with the 4th electric capacity C4 is connected and is grounded, and plays a part of voltage stabilizing.
First voltage reprocessing is exported and gives DC leakage monitoring unit by dual power supply boosting unit 400 respectively for second voltage
500 and absolute value rectification unit 600.Specifically, dual power supply boosting unit 400 is after first voltage 5V voltages are received, pass through
Double-current boosting is handled, and 5V voltages are changed into second voltage ± 12V, then exports respectively and gives the He of DC leakage monitoring unit 500
Absolute value rectification unit 600, the herein preferred Hall direct current instrument transformer of DC leakage monitoring unit 500.
DC leakage monitoring unit 500 is used to the direct current signal received being sent to the absolute value rectification unit 600,
The optocoupler driving output unit 700 is resent to after being handled through the absolute value of absolute value rectification unit 600.Specifically, working as
When having monitored DC leakage signal, Hall direct current instrument transformer exports the d. c. voltage signal sensed by 3 pin OUTPUT,
Because direct current is directive, so the d. c. voltage signal of output is probably negative signal, it is impossible to detected, it is possible to
By absolute value rectification unit 600, negative voltage signal is converted into the positive voltage signal of same amplitude, it is single by optocoupler driving output
One or four end photoelectricity photoelectrical coupler U4 of member 700 anode input, the one or four end photoelectricity photoelectrical coupler U4 negative electrode passes through
13rd resistance R13 is grounded, and the one or four end photoelectricity photoelectrical coupler U4 colelctor electrode is connected with 5V voltages, the one or four end photoelectricity light
Electric coupler U4 emitter stage is grounded by the 14th resistance R14, and is exported by the tenth diode D10 to external control system
Voltage.
A types electric leakage sensing unit 300 is used to the electric leakage signal received being sent to the A types electric leakage monitoring unit 200,
The optocoupler driving output unit 700 is resent to after the A types electric leakage enhanced processing of monitoring unit 200.
Specifically, A types electric leakage monitoring unit 200 includes A type detection of electrical leakage chip U1, A type detection of electrical leakage chips U1 and included
Eight pins, the first pin VSS and the 4th pin VSS ground connection, second pin IN1 and the 3rd pin IN2 are used to receive the A types
The electric leakage signal of electric leakage sensing unit 300, the 5th pin OS is connected with optocoupler driving output unit 700, and passes through the 3rd
Electric capacity C3 is grounded, and the 6th pin DIy is grounded by the 6th electric capacity C6, the 7th pin OA is grounded by the 5th electric capacity C5, and the 8th draws
Pin VDD is connected with the first end of the bridge rectifier.
When leaking electricity, the leakage current sensed is filtered by zero sequence current mutual inductor ZCT by the first electric capacity C1,
Leakage current is converted into voltage signal, then the 5th diode D5 and the 6th by connecting in the opposite direction by first resistor R1
Diode D6 carries out clamper, is output to A type detection of electrical leakage chips U1 second pin IN1 finally by second resistance R2, passes through
3rd resistor R3 is output to A type detection of electrical leakage chips U1 the 3rd pin IN2.In second resistance R2 and A type detection of electrical leakage chips
It is connected in parallel between U1 second pin IN1, between 3rd resistor R3 and A type detection of electrical leakage chip U1 the 3rd pin IN2
Second electric capacity C2 is filtered, protection A type detection of electrical leakage chip U1 false triggering outputs.The key switch S1 and the 6th resistance R6,
Connected between seven resistance R7, through zero sequence current mutual inductor ZCT, the key switch S1 mono- terminates L3, the termination N of R7 mono-, composition
Testing button loop.
When being input to A type detection of electrical leakage chips U1 the 3rd pin IN2 voltages of second pin IN1 sums and reaching threshold values, A
Electric leakage signal is amplified by type detection of electrical leakage chip U1, then is exported by the 5th pin OS to the two or four end photoelectrical coupler U5
Anode, the two or four end photoelectrical coupler U5 negative electrodes are grounded by the 15th resistance R15, the two or four end photoelectrical coupler U5 current collections
Pole is connected with 5V voltages, and the two or four end photoelectrical coupler U5 emitter stages are grounded by the 16th resistance R16, and pass through enneode
D9 is to external control system output voltage.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
It is any be familiar with the people of the technology disclosed herein technical scope in, it is contemplated that change or replacement all cover in this hair
Within bright protection domain.Therefore, protection scope of the present invention should be defined by protective scope of the claims.
Claims (8)
1. a kind of leakage monitoring device for automobile charging pile, it is characterised in that including step-down rectifier unit（100）, the leakage of A types
Pyroelectric monitor unit（200）, A types electric leakage sensing unit（300）, dual power supply boosting unit（400）, DC leakage monitoring unit
（500）, absolute value rectification unit（600）, optocoupler driving output unit（700）And rectification circuit；
The rectification circuit includes four lines, respectively L1, L2, L3 and N；
The step-down rectifier unit（100）It is connected with the rectification circuit, converts voltage to first voltage and be respectively sent to institute
State A types electric leakage monitoring unit（200）With the dual power supply boosting unit（400）, the dual power supply boosting unit（400）By first
Voltage reprocessing is exported to the DC leakage monitoring unit respectively for second voltage（500）With the absolute value rectification unit
（600）；
The A types electric leakage sensing unit（300）For the electric leakage signal received to be sent into the A types electric leakage monitoring unit
（200）, by A types electric leakage monitoring unit（200）The optocoupler driving output unit is resent to after enhanced processing
（700）；
The DC leakage monitoring unit（500）For the direct current signal received to be sent into the absolute value rectification unit
（600）, through the absolute value rectification unit（600）The optocoupler driving output unit is resent to after absolute value processing（700）.
2. a kind of leakage monitoring device for automobile charging pile according to claim 1, it is characterised in that the decompression
Rectification unit（100）Including piezo-resistance（RV）, the 4th resistance（R4）, the 5th resistance（R5）With by the first diode（D1）,
Two diodes（D2）, the 3rd diode（D3）, the 4th diode（D4）The bridge rectifier constituted；
First diode（D1）Negative electrode and second diode（D2）Negative electrode connection be used as the bridge rectifier electricity
The first end on road, the 3rd diode（D3）Anode and the 4th diode（D4）Anode connection be used as the bridge-type
Second end of rectification circuit, second diode（D2）Anode and the 4th diode（D4）Negative electrode connection be used as institute
State the 3rd end of bridge rectifier, first diode（D1）Anode and the 3rd diode（D3）Negative electrode connection
It is used as the 4th end of the bridge rectifier；
4th resistance（R4）With the 5th resistance（R5）It is connected in series with the first end of the bridge rectifier；
The piezo-resistance（RV）One end and the bridge rectifier three-terminal link, the other end and the rectification circuit
L3 connections.
3. a kind of leakage monitoring device for automobile charging pile according to claim 2, it is characterised in that the decompression
Rectification unit（100）Also include the 4th electric capacity（C4）And voltage-regulator diode（Q2）, the 4th electric capacity（C4）Anode with it is described
5th resistance（R5）Output end connection, the voltage-regulator diode（Q2）Negative electrode and the 4th electric capacity（C4）Anode output
End connection, the voltage-regulator diode（Q2）Anode and the 4th electric capacity（C4）Negative electrode, the of the bridge rectifier
Two ends connect and are grounded.
4. a kind of leakage monitoring device for automobile charging pile according to claim 3, it is characterised in that the A types
Leak electricity monitoring unit（200）Including A type detection of electrical leakage chips（U1）, the 6th electric capacity（C6）With the 5th electric capacity（C5）；
The A types detection of electrical leakage chip（U1）Including eight pins, the first pin（VSS）With the 4th pin（VSS）Ground connection, second
Pin（IN1）With the 3rd pin（IN2）For receiving the A types electric leakage sensing unit（300）Electric leakage signal, the 5th pin
（OS）Output unit is driven with the optocoupler（700）Connection, and pass through the 3rd electric capacity（C3）Ground connection, the 6th pin（DIy）Pass through
6th electric capacity（C6）Ground connection, the 7th pin（OA）Pass through the 5th electric capacity（C5）Ground connection, the 8th pin（VDD）With the bridge rectifier
The first end connection of circuit.
5. a kind of leakage monitoring device for automobile charging pile according to claim 3, it is characterised in that the A types
Leak electricity sensing unit（300）Including key switch（S1）, zero sequence current mutual inductor (ZCT), first resistor（R1）, second resistance
（R2）, 3rd resistor（R3）, the 6th resistance（R6）, the 7th resistance（R7）, the first electric capacity（C1）, the 5th diode（D5）With the 6th
Diode（D6）；
The leakage current sensed is passed through second resistance by the zero sequence current mutual inductor (ZCT)（R2）It is input to the A types leakage
Electro-detection chip（U1）The second pin（IN1）, pass through 3rd resistor（R3）It is input to the A types detection of electrical leakage chip
（U1）The 3rd pin（IN2）, in the zero sequence current mutual inductor (ZCT) and the second resistance（R2）And 3rd resistor
（R3）Between be connected in parallel to first electric capacity that can be filtered to leakage current successively（C1）, leakage current is converted to
The first resistor of voltage signal（R1）With the 5th diode in opposite direction（D5）With the 6th diode（D6）, it is described
The other end of zero sequence current mutual inductor (ZCT) and the key switch（S1）, the 6th resistance（R6）, the 7th resistance（R7）Connection,
The key switch（S1）The other end connect the rectification circuit L3.
6. a kind of leakage monitoring device for automobile charging pile according to claim 4, it is characterised in that described
Two resistance（R2）With A types electric leakage monitoring unit（200）Second pin（IN1）Between, the 3rd resistor（R3）With institute
State A types electric leakage monitoring unit（200）The 3rd pin（IN2）Between be connected in parallel to the second electric capacity（C2）.
7. a kind of leakage monitoring device for automobile charging pile according to claim 1, it is characterised in that the direct current
Leak electricity monitoring unit（500）For Hall direct current instrument transformer, the leakage current sensed is exported to described absolute by the 3rd pin
It is worth rectification unit（600）, the absolute value rectification unit（600）The negative voltage received is overturn and claims equivalent positive voltage signal
Output to the optocoupler drives output unit（700）.
8. a kind of leakage monitoring device for automobile charging pile according to claim 1, it is characterised in that the optocoupler
Drive output unit（700）Including the one or four end photoelectrical coupler（U4）With the two or four end photoelectrical coupler（U5）；Described first
Four end photoelectrical couplers（U4）Anode and the absolute value rectification unit（600）Connection, negative electrode passes through the 13rd resistance（R13）
Ground connection, colelctor electrode is connected with 5V voltages, and emitter stage passes through the 14th resistance（R14）Ground connection, and pass through the tenth diode（D10）To
Outer output voltage；Two or four end photoelectricity photoelectrical coupler（U5）Anode and the A types leak electricity monitoring unit（200）
Five pins（OS）Connection, negative electrode passes through the 15th resistance（R15）Ground connection, colelctor electrode is connected with 5V voltages, and emitter stage passes through the tenth
Six resistance（R16）Ground connection, and pass through enneode（D9）Outside output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710329606.3A CN106980065B (en) | 2017-05-11 | 2017-05-11 | Electric leakage monitoring device for automobile charging pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710329606.3A CN106980065B (en) | 2017-05-11 | 2017-05-11 | Electric leakage monitoring device for automobile charging pile |
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| CN106980065A true CN106980065A (en) | 2017-07-25 |
| CN106980065B CN106980065B (en) | 2023-09-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110176747A (en) * | 2019-05-30 | 2019-08-27 | 重庆国翰能源发展有限公司 | A kind of observation circuit for charging pile |
| CN112415351A (en) * | 2020-11-04 | 2021-02-26 | 四川光慧新能源科技有限公司 | Insulation monitoring method for completing connection of charging pile on line |
| CN112462296A (en) * | 2020-11-05 | 2021-03-09 | 广东电网有限责任公司阳江供电局 | Be applied to electrified alarm device at power consumption monitor terminal |
| CN113125995A (en) * | 2021-02-26 | 2021-07-16 | 青岛鼎信通讯股份有限公司 | Passive alarm circuit that cooperation collection terminal table case electric leakage monitoring was used |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110176747A (en) * | 2019-05-30 | 2019-08-27 | 重庆国翰能源发展有限公司 | A kind of observation circuit for charging pile |
| CN112415351A (en) * | 2020-11-04 | 2021-02-26 | 四川光慧新能源科技有限公司 | Insulation monitoring method for completing connection of charging pile on line |
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| CN113125995A (en) * | 2021-02-26 | 2021-07-16 | 青岛鼎信通讯股份有限公司 | Passive alarm circuit that cooperation collection terminal table case electric leakage monitoring was used |
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| Publication number | Publication date |
|---|---|
| CN106980065B (en) | 2023-09-22 |
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