CN207799007U - The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post - Google Patents
The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post Download PDFInfo
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- CN207799007U CN207799007U CN201820070331.6U CN201820070331U CN207799007U CN 207799007 U CN207799007 U CN 207799007U CN 201820070331 U CN201820070331 U CN 201820070331U CN 207799007 U CN207799007 U CN 207799007U
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- 238000009413 insulation Methods 0.000 title claims abstract description 73
- 238000007689 inspection Methods 0.000 title claims abstract description 30
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 45
- 230000005611 electricity Effects 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
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- 230000001737 promoting effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000003708 edge detection Methods 0.000 description 1
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Abstract
The utility model discloses a kind of Insulation Inspection Systems of the anti-reverse charge protection of direct-current charging post, including：Battery voltage measurement circuit, charging pile voltage detecting circuit and insulation detecting circuit；Governor circuit is connect with above each circuit respectively by telecommunication circuit；The governor circuit is consistent with the polarity of voltage of the charging pile according to the polarity of voltage of the batteries of electric automobile, sends out charging instruction, otherwise sends out the instruction of No starting charging；Meanwhile the governor circuit calculates the insulating resistance value of charging pile over the ground according to the insulating resistance value, and judge whether its resistance value is infinitely great, to analyze whether the charging pile insulate, to send out the instruction whether charged.Using the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model, the situation that can be detected whether reversal connection simultaneously and whether insulate is safe to be made whether the instruction that can be charged.
Description
Technical field
The utility model belongs to electric automobile charging pile technical field, and in particular to a kind of anti-reverse charging of direct-current charging post
The Insulation Inspection System of protection.
Background technology
Since global energy-saving and emission-reduction and environmental consciousness are continuously increased, new-energy automobile development is getting faster, and course continuation mileage increases
By force, battery capacity is also increasing, and at the same time corollary equipment charging pile is also more and more universal.Charging pile is due to its charging speed
Degree is fast, and power is big, and volume is big, and electric current is big, and voltage is high, is widely used, while its safety increasingly obtains producer and user
Attention.The detection of charging pile insulation against ground ensures that electrically-charging equipment is normal, and charging pile and interior battery pack secure connection fill
Electricity has great importance.
Charging pile is often mounted on outwork, exposes to the sun and rain, high temperature, severe cold, working environment is severe, and capacity causes to charge
The aging of stake insulating materials, decreasing insulating.If charging pile insulation is bad, human body touching car body or pile body are easy to cause
Danger Electric shock risk, while can also influence the normal work of charging equipment and electric vehicle.Charging pile Insulation monitoring and protection dress are installed
It sets, prevents trouble before it happens, it is quite necessary to.
New-energy automobile is fast-developing, and new-energy automobile manufacturer is more and more, and the product of each family is all different, electric vehicle
Battery capacity is increasing, and the DC voltage of battery pack positive and negative anodes several hectovolts easily, charging pile fills interior battery pack
When electric, it is necessary to ensure that DC voltage positive and negative anodes and battery pack positive and negative anodes are corresponding, reversal connection situation cannot occur.Once reversal connection is filled
Electricity, consequence are hardly imaginable.
Traditional insulating detection equipment is all to measure insulating resistance value, stake side voltage, stake side electricity based on having a single function
One of functions such as stream, automobile battery voltage, individual equipment installation occupied space are more.Insulation monitoring is just individually discussed, has been deposited
In a large amount of patented technology, for example, Publication No. CN104330712A, CN105717433A, CN105527535A,
CN106841962A, CN102759693A, CN102830283A etc. use the principle of uneven bridge, but not to voltage
Acquired in real time with electric current, it may appear that overvoltage, overcurrent the case where, gently then damage stake, vehicle；It is heavy then, test pile side voltage or vapour
When vehicle battery voltage values, positive voltage is only tested, negative voltage is not measured and is even ignored, it is hidden to cause greatly safety
Suffer from.If charging pile exports, positive and negative anodes are anti-or battery plus-negative plate is anti-, and charging will cause battery to charge explosion accident.Tradition
Insulation detection device is detected the insulating properties of charging pile, not can determine that the secure connection of charging pile and automobile batteries group.
The considerations of for safety and install convenient, the Insulation Inspection System of anti-reverse charging comes into being.
Utility model content
In order to solve above-mentioned reversal connection charging and Insulation Problems, the purpose of this utility model is to provide a kind of direct-current charging posts
The Insulation Inspection System of anti-reverse charge protection, the situation that can be detected whether reversal connection simultaneously and whether insulate are to make
The no instruction that can be charged, it is safe.
To achieve the above object, the utility model is achieved by following technical scheme：
The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model, including：
Battery voltage measurement circuit, the partial pressure sample information for acquiring batteries of electric automobile；
Charging pile voltage detecting circuit, the output voltage current information for acquiring charging pile；
Insulation detecting circuit, for detecting the direct current output anode of charging pile resistance value over the ground and direct current output cathode pair
The insulating resistance value on ground；
Governor circuit is connect with above each circuit respectively by telecommunication circuit；
The governor circuit calculates the generating positive and negative voltage value of batteries of electric automobile according to the partial pressure sample information of the battery,
And analyze the polarity of voltage of batteries of electric automobile；The governor circuit is according to above-mentioned output voltage current information, described in judgement
The polarity of voltage of charging pile, then the governor circuit is according to the polarity of voltage of the batteries of electric automobile and the charging pile
Polarity of voltage is consistent, sends out charging instruction, otherwise sends out the instruction of No starting charging；
Meanwhile the governor circuit calculates the insulating resistance value of charging pile over the ground according to the insulating resistance value, and sentence
Whether its resistance value of breaking is infinitely great, to analyze whether the charging pile insulate, to send out the instruction whether charged.
Further, the battery voltage detection circuit includes voltage transformer in sequential series, sampling resistor, signal tune
Sub-circuit and voltage acquisition sub-circuit are managed, carries out partial pressure sampling for the battery to electric vehicle, and sample information is passed through and is led to
Letter circuit is sent to governor circuit, to calculate the generating positive and negative voltage value of batteries of electric automobile.
Further, the signal condition sub-circuit includes three roads operational amplifier U2A, U2B and U3B in sequential series；
The voltage transformer reduces the cell voltage of electric vehicle in proportion, then by sampling resistor, is filtered, via institute
After the high impedance isolation processing for stating the high impedance isolation processing of operational amplifier U2A, the signal condition of U2B and U3B, it is sent into institute
State the processing of voltage acquisition sub-circuit.
Further, the charging pile voltage detecting circuit includes concatenated voltage acquisition sub-circuit and current acquisition electricity
Road；The voltage acquisition sub-circuit is used to carry out partial pressure sampling to charging pile output voltage, and by sample information by communicating electricity
Road is sent to governor circuit, to calculate the voltage value of charging pile；The current acquisition sub-circuit is used to export electricity to charging pile
Stream carries out conversion sampling, and sample information is sent to governor circuit by telecommunication circuit, to calculate the current value of charging pile；
The governor circuit obtains the corresponding polarity of voltage of charging pile and output current value according to the voltage value and current value.
Further, the insulation detecting circuit includes for detecting the resistance value of the direct current output anode of charging pile over the ground
First detection sub-circuit and for detect the resistance value of the direct current output cathode of charging pile over the ground second detection sub-circuit；Institute
It is in parallel with the second detection sub-circuit to state the first detection sub-circuit；One end connection charging pile of the first detection sub-circuit
Positive CD+, the other end are connect by voltage acquisition sub-circuit with governor circuit；One end of the second detection sub-circuit and charging
The cathode CD- connections of stake, the other end are connect by voltage acquisition sub-circuit with governor circuit.
Further, the first detection sub-circuit includes first switch S1, first resistor R1 and second resistance R2；It is described
After first switch S1 connects with second resistance R2, and it is in parallel with first resistor R1.
Further, the second detection sub-circuit includes second switch S2,3rd resistor R3 and the 4th resistance R4；It is described
After second switch S2 connects with the 4th resistance R4, and it is in parallel with 3rd resistor R3.
Further, the voltage acquisition sub-circuit includes partial pressure unit or voltage isolated location.
Further, the governor circuit is also associated with the condition indication circuit for showing whole system state.
Further, the condition indication circuit includes that operation parallel with one another indicates sub-circuit, communication instruction sub-circuit
With indicating fault sub-circuit.
Further, the telecommunication circuit is electric with battery voltage detection circuit, charging pile voltage respectively by RS485 interfaces
It flows Acquisition Circuit and insulation detecting circuit carries out data exchange.
Compared with prior art, the utility model has the beneficial effects that：
The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model, is examined by cell voltage
Slowdown monitoring circuit, charging pile voltage and current Acquisition Circuit and governor circuit are completed to the battery polar of electric vehicle and the polarity of charging pile
Analysis, whether the polarity both to judge is consistent, if unanimously, sending out charging instruction, otherwise sends out the finger for stopping charging
It enables.
Meanwhile the positive and negative insulating resistance value to charging pile over the ground is completed by insulation detecting circuit and governor circuit, in turn
Judge whether it is infinitely great, if it is, insulation means that power supply circuit has certain electric leakage if insulation numerical value declines
Stream drain in (PE) system, i.e., there are security risks for insulation.
The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model operates more than carrying out
During, computational accuracy is high, high safety, and installs simply, at low cost, is worth promoting.
Description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the circuit theory of the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model
Block diagram；
Fig. 2 be the anti-reverse charge protection of direct-current charging post described in the utility model Insulation Inspection System in cell voltage
The detection principle diagram of measuring circuit；
Fig. 3 be the anti-reverse charge protection of direct-current charging post described in the utility model Insulation Inspection System in mutual induction of voltage
Device and the circuit diagram for using resistance；
Fig. 4 be the anti-reverse charge protection of direct-current charging post described in the utility model Insulation Inspection System in signal condition
The circuit diagram of sub-circuit；
Fig. 5 be the anti-reverse charge protection of direct-current charging post described in the utility model Insulation Inspection System in charging pile electricity
Press the detection principle diagram of detection circuit；
Fig. 6 be the anti-reverse charge protection of direct-current charging post described in the utility model Insulation Inspection System in Insulation monitoring
The circuit diagram of circuit；
Fig. 7 and Fig. 8 is the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model respectively
Circuit diagram of the middle insulation detecting circuit in implementation process.
In figure：
1：Battery voltage measurement circuit 2：Charging pile voltage detecting circuit
3：Insulation detecting circuit
31：First detection sub-circuit 32：Second detection sub-circuit
4：Governor circuit 5：Telecommunication circuit 6：Condition indication circuit
Specific implementation mode
The preferred embodiment of the utility model is illustrated below in conjunction with attached drawing, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
As shown in Figure 1, the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post described in the utility model, passes through
Consistency judgement is carried out to the polarity of voltage of the polarity of voltage of batteries of electric automobile and charging pile simultaneously.Meanwhile it being examined by insulating
Slowdown monitoring circuit obtains the insulating resistance value over the ground of charging pile, and the two is completed at the same time anti-reverse and exhausted under the analysis of governor circuit
The purpose of edge detection, multiple functional, high safety, and it is simple in structure, it is at low cost, it is worth promoting.
Wherein, the Insulation Inspection System of the anti-reverse charge protection of the direct-current charging post specifically includes battery voltage detection electricity
Road 1, charging pile voltage detecting circuit 2, insulation detecting circuit 3, governor circuit 4 and telecommunication circuit 5；Wherein, the governor circuit 4
Connected respectively with the battery voltage detection circuit 1, charging pile voltage detecting circuit 2 and insulation detecting circuit 3 by telecommunication circuit 5
It connects.
The battery voltage detection circuit 1 is to acquire information for acquiring the partial pressure of batteries of electric automobile, and by the partial pressure
Acquisition information is transmitted to governor circuit 4 by telecommunication circuit 5, and the governor circuit 2 acquires information according to above-mentioned partial pressure and calculates
The generating positive and negative voltage value of batteries of electric automobile, to analyze the polarity of voltage of the batteries of electric automobile.Meanwhile the charging pile electricity
The output voltage current information of the charging pile of acquisition can be sent to governor circuit 4, the governor circuit 4 by pressure detection circuit 2
According to above-mentioned output voltage current information, the polarity of voltage and output current value of the charging pile are judged, and then by master control electricity
Road 4 carries out consistency judgement to the polarity of voltage of batteries of electric automobile and the polarity of voltage of charging pile, if unanimously, i.e., electronic vapour
The anode of vehicle battery is connect with the anode of charging pile, and the cathode of batteries of electric automobile and the cathode of charging pile connect, and send out charging
Instruction；If inconsistent, indicate that there are reversal connection hidden danger, then send out the instruction for stopping charging, finally realize anti-reverse purpose.
Before understanding insulation detecting circuit described in the utility model, first the principle of Insulation monitoring is done and is illustrated：
Its full name is the detection of insulation against ground resistance value, means the resistance of detection charging pile direct current output positive and negative anodes (PE) over the ground, uses
To indicate whether the insulation performance of positive and negative anodes supply line, detection ultra-high-tension power transmission line have whether insulation fault, circuit leak electricity
Problem.It is indicated with ohm law：The ideal insulator chains of R=U/I, insulation resistance are infinitely great.
When the voltage constant of charging pile output, when system insulation numerical value declines, it is meant that power supply circuit has certain electric leakage
Stream drain in (PE) system, i.e., there are security risks for insulation.
The insulation detecting circuit 3 is for detecting the insulating resistance value of charging pile over the ground, includes specifically direct current output
The anode insulating resistance value of resistance value and direct current output cathode over the ground over the ground, then the insulating resistance value be transmitted to the master control
Circuit 4, and the insulating resistance value of charging pile over the ground is calculated by the governor circuit 4, to judge whether it is infinitely great, if
It is then to send out the instruction of charging, otherwise there is security risk, No starting charging.
In order to be further better understood upon to principles above, then done in conjunction with specific circuit diagram or equivalent circuit as follows
Explanation：
As shown in Fig. 2, the battery voltage detection circuit 1 includes voltage transformer connected in sequence, sampling resistor, signal
Sub-circuit and voltage acquisition sub-circuit are improved, carries out partial pressure sampling for the battery to electric vehicle, and sample information is passed through
Telecommunication circuit is sent to governor circuit, to calculate the generating positive and negative voltage value of batteries of electric automobile.When the voltage for calculating battery is big
When 0, i.e., batteries of electric automobile voltage is positive value, illustrates that cell voltage polarity is just；When the voltage for calculating battery is less than 0
When, i.e., batteries of electric automobile voltage is negative value, illustrates automobile battery voltage reversal connection, is at this time reversal connection failure, prompt system insulation
It is anti-to monitor polarity, system is forbidden to charge.Status indicator lamp shows failure, while sending failure to charging pile by telecommunication circuit 5.
Specifically, as shown in Figure 3 and Figure 4, the signal condition sub-circuit includes three roads operational amplifier in sequential series
U2A, U2B and U3B；(CHV-25P is a kind of accurate Hall sensor, using coil-induced original to the voltage transformer U1
Reason) cell voltage of electric vehicle is reduced in proportion, become the voltage of 0-1.0V ranges, scaling is 1000 times (specific
Can be according to practical adjustment diminution ratio), after conversion, come from pin3 outputs to Vout1, then by sampling resistor, at filtering
Reason, via the high impedance isolation processing of the operational amplifier U2A, the high impedance isolation processing of the signal condition of U2B and U3B
Afterwards, it is sent into the voltage acquisition sub-circuit processing.Finally, it is analyzed and determined by governor circuit 4, using 2.2V current potentials as sentencing
Breakpoint, 2.2V-3.3V batteries just connect；0-2.19V battery reversal connections.
As shown in figure 5, the charging pile voltage detecting circuit 2 includes concatenated voltage acquisition sub-circuit and current acquisition
Circuit；Sample information is passed through communication by the voltage acquisition sub-circuit for carrying out partial pressure sampling to charging pile output voltage
Circuit is sent to governor circuit 4, to calculate the voltage value of charging pile；The current acquisition sub-circuit is used to export charging pile
Electric current carries out conversion sampling, and sample information is sent to governor circuit 4 by telecommunication circuit, to calculate the electric current of charging pile
Value；The governor circuit obtains the corresponding polarity of voltage of charging pile and output current value according to the voltage value and current value.
Specifically, when calculating charging pile output voltage more than 0, i.e., charging pile output voltage is positive value, illustrates to charge
Stake output voltage polarity is normal.At this point it is possible to according to sample voltage value, synchronizes and calculate charging pile output current value；Work as calculating
Go out battery voltage be less than 0 when, i.e., charging pile output voltage be negative value, illustrate charging pile output voltage error-polarity connection, at this time for
Charging pile exports reversal connection failure, and prompt system insulating monitoring polarity is anti-, and system is forbidden to charge.Status indicator lamp shows failure, together
When by telecommunication circuit 5 send failure to charging pile.
As shown in fig. 6, the insulation detecting circuit 3 includes for detecting the resistance of the direct current output anode of charging pile over the ground
The first of value detects sub-circuit 31 and the second detection son electricity for detecting the resistance value of the direct current output cathode of charging pile over the ground
Road 32；The first detection sub-circuit 31 is in parallel with the second detection sub-circuit 32；The one of the first detection sub-circuit 31
The positive CD+ of end connection charging pile, the other end are connect by voltage acquisition sub-circuit with governor circuit 4；Second detection
One end of circuit 32 and the cathode CD- connections of charging pile, the other end are connect by voltage acquisition sub-circuit with governor circuit 4.Institute
It includes partial pressure unit or voltage isolated location to state voltage acquisition sub-circuit, wherein partial pressure unit by electric resistance partial pressure, high pressure drop at
Low pressure；The voltage isolated location is isolated with optocoupler or Hall sensor.The two can complete voltage acquisition
Function.
Wherein, the first detection sub-circuit 31 includes first switch S1, first resistor R1 and second resistance R2；Described
After one switch S1 connects with second resistance R2, and it is in parallel with first resistor R1.The second detection sub-circuit 32 is opened including second
Close S2,3rd resistor R3 and the 4th resistance R4；After the second switch S2 connects with the 4th resistance R4, and simultaneously with 3rd resistor R3
Connection.
Insulation detecting circuit 3 described above accurately calculates insulation against ground resistance value using uneven bridge principle.
Wherein, DC+ is charging pile cathode voltage, and DC- is charging pile cathode voltage, and R2 is charging pile DC voltage electrode
Resistance and S1 series connection are launched, is closed by S1, resistance is launched into closed circuit.R1 is charging pile anode parallel resistance.Rg
+ be charging pile anode insulation resistance.
Wherein, R4 is dispensing resistance and the S2 series connection of charging pile DC voltage cathode, is closed by S2, resistance is launched
Into closed circuit.R3 is charging pile cathode parallel resistance.Rg- is the insulation resistance of charging pile cathode.
Insulation resistance detection method is carried out to the charging pile, steps are as follows：
Walk poly- 1：As shown in fig. 7, the voltage value of closure switch S1, MCU reading ADC, can calculate V1, the voltage of V2
Value.It is then turned off switch K1.
Since R1, R2, Rg+ constitute parallel relationship, R3 and Rg- constitute parallel relationship
V1/ (R1//R2//Rg+)=V2/ (R3//Rg-)
Step 2：As shown in figure 8, the voltage value of closure switch S2, MCU reading ADC, can calculate V4, the voltage of V3
Value.It is then turned off switch S2.
Since R3, R4 and Rg- constitute parallel relationship, R2, Rg+ constitute parallel relationship,
V3/ (R3//R4//Rg-)=V4/ (R2//Rg+)
Step 3：Two formulas substitute into, and can accurately find out charging pile anode insulation resistance Rg+, negative insulation resistance Rg-
Equation is solved, obtains insulation resistance formula:
K1=V2/V1
K2=V4/V3
Enable Rg1+=(K2*K1-1) * R2/ (1+K1)
Calculate to obtain Rg+=(Rg1+*R1)/(R1-Rg1+)
Similarly
Enable Rg1-=(K2*K1-1) * R2/ (1+K2)
Calculate to obtain Rg-=(Rg1-*R1)/(R1-Rg1-)
For governor circuit 4 described in the utility model, using the M3 kernels microcontroller (MCU) of STMicw Electronics,
Built-in 12 ADC, high resolution, conversion rate is fast, and the numerical value to being sent into microcontroller is handled, and can accurately calculate electricity
The numerical value such as pressure, electric current, resistance.
For the ease of more intuitive real testing result, the governor circuit 4 is also associated with condition indication circuit 6, wraps
Sub-circuit, communication instruction sub-circuit and indicating fault sub-circuit are indicated containing operation.Wherein, the operation indicates sub-circuit in monolithic
Machine is lighted when running, and the communication instruction sub-circuit is flickered when communicating normal, and no communication is then extinguished.The indicating fault electricity
Road is flickered when detecting that cell voltage polarity is opposite with charging pile polarity of voltage, and fault-free is then extinguished；Meanwhile insulation is examined
It is flickered when survey and failure, fault-free is then put out.
Meanwhile the telecommunication circuit 5 by RS485 interfaces respectively with battery voltage detection circuit 1, charging pile voltage and current
Acquisition Circuit 2 and insulation detecting circuit 3 carry out data exchange.
The Insulation Inspection System other structures of the anti-reverse charge protection of direct-current charging post described in the utility model are referring to existing
There is technology, details are not described herein.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, therefore it is every without departing from the content of the technical scheme of the utility model, according to the technical essence of the utility model to implementing above
Any modification, equivalent variations and modification, are still within the scope of the technical solutions of the present invention made by example.
Claims (10)
1. a kind of Insulation Inspection System of the anti-reverse charge protection of direct-current charging post, which is characterized in that including：
Battery voltage measurement circuit, the partial pressure sample information for acquiring batteries of electric automobile；
Charging pile voltage detecting circuit, the output voltage current information for acquiring charging pile；
Insulation detecting circuit, for detecting the direct current output anode of charging pile resistance value over the ground and direct current output cathode over the ground
Insulating resistance value；
Governor circuit is connect with above each circuit respectively by telecommunication circuit；
The governor circuit calculates the generating positive and negative voltage value of batteries of electric automobile according to the partial pressure sample information of the battery, and divides
The polarity of voltage of batteries of electric automobile is precipitated；The governor circuit judges the charging according to above-mentioned output voltage current information
The polarity of voltage of stake；Then the governor circuit is according to the voltage of the polarity of voltage and the charging pile of the batteries of electric automobile
Polarity is consistent, sends out charging instruction, otherwise sends out the instruction of No starting charging；
Meanwhile the governor circuit calculates the insulating resistance value of charging pile over the ground according to the insulating resistance value, and judge it
Whether resistance value is infinitely great, to analyze whether the charging pile insulate, to send out the instruction whether charged.
2. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 1, it is characterised in that：
The battery voltage detection circuit includes voltage transformer, sampling resistor, signal condition sub-circuit and electricity in sequential series
Pressure acquisition sub-circuit, carries out partial pressure sampling, and sample information is sent to by telecommunication circuit for the battery to electric vehicle
Governor circuit, to calculate the generating positive and negative voltage value of batteries of electric automobile.
3. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 2, it is characterised in that：
The signal condition sub-circuit includes three roads operational amplifier U2A, U2B and U3B in sequential series；
The voltage transformer reduces the cell voltage of electric vehicle in proportion, then by sampling resistor, is filtered, warp
After high impedance isolation processing by the high impedance isolation processing of the operational amplifier U2A, the signal condition of U2B and U3B, send
Enter the voltage acquisition sub-circuit processing.
4. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 1, it is characterised in that：
The charging pile voltage detecting circuit includes concatenated voltage acquisition sub-circuit and current acquisition sub-circuit；
The voltage acquisition sub-circuit is used to carry out partial pressure sampling to charging pile output voltage, and by sample information by communicating electricity
Road is sent to governor circuit, to calculate the voltage value of charging pile；
The current acquisition sub-circuit is used to carry out conversion sampling to charging pile output current, and by sample information by communicating electricity
Road is sent to governor circuit, to calculate the current value of charging pile；
The governor circuit obtains the corresponding polarity of voltage of charging pile and output current value according to the voltage value and current value.
5. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 1, it is characterised in that：
The insulation detecting circuit includes the first detection for detecting the resistance value of the direct current output anode of charging pile over the ground
Circuit and for detect the resistance value of the direct current output cathode of charging pile over the ground second detection sub-circuit；
The first detection sub-circuit is in parallel with the second detection sub-circuit；
The positive CD+ of one end connection charging pile of the first detection sub-circuit, the other end pass through voltage acquisition sub-circuit and master
Control circuit connection；
The cathode CD- connections of one end and charging pile of the second detection sub-circuit-, the other end by voltage acquisition sub-circuit and
Governor circuit connects.
6. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 5, it is characterised in that：
The first detection sub-circuit includes first switch S1, first resistor R1 and second resistance R2；
Described first opens after S1 connects with second resistance R2, and in parallel with first resistor R1.
7. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 5, it is characterised in that：
The second detection sub-circuit includes second switch S2,3rd resistor R3 and the 4th resistance R4；
After the second switch S2 connects with the 4th resistance R4, and it is in parallel with 3rd resistor R3.
8. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 1, it is characterised in that：
The governor circuit is also associated with the condition indication circuit for showing whole system state.
9. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 8, it is characterised in that：
The condition indication circuit includes that operation parallel with one another indicates sub-circuit, communication instruction sub-circuit and indicating fault electricity
Road.
10. the Insulation Inspection System of the anti-reverse charge protection of direct-current charging post according to claim 1, it is characterised in that：
The telecommunication circuit by RS485 interfaces respectively with battery voltage detection circuit, charging pile voltage and current Acquisition Circuit and
Insulation detecting circuit carries out data exchange.
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| CN201820070331.6U CN207799007U (en) | 2018-01-16 | 2018-01-16 | The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152692A (en) * | 2018-01-16 | 2018-06-12 | 广州天嵌计算机科技有限公司 | The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post |
| WO2022110989A1 (en) * | 2020-11-25 | 2022-06-02 | 珠海格力电器股份有限公司 | Insulation resistance detection circuit, resistance detection method, converter and photovoltaic centrifuge |
| CN117154899A (en) * | 2023-10-30 | 2023-12-01 | 宁德时代新能源科技股份有限公司 | Charging control device, method, electronic device, readable storage medium, and system |
-
2018
- 2018-01-16 CN CN201820070331.6U patent/CN207799007U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152692A (en) * | 2018-01-16 | 2018-06-12 | 广州天嵌计算机科技有限公司 | The Insulation Inspection System of the anti-reverse charge protection of direct-current charging post |
| WO2022110989A1 (en) * | 2020-11-25 | 2022-06-02 | 珠海格力电器股份有限公司 | Insulation resistance detection circuit, resistance detection method, converter and photovoltaic centrifuge |
| US12105135B2 (en) | 2020-11-25 | 2024-10-01 | Gree Electric Appliances, Inc. Of Zhuhai | Insulation impedance detection circuit, impedance detection method, converter and photovoltaic centrifuge |
| CN117154899A (en) * | 2023-10-30 | 2023-12-01 | 宁德时代新能源科技股份有限公司 | Charging control device, method, electronic device, readable storage medium, and system |
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