CN109490619A - A kind of direct-current charging post high accuracy number metering device - Google Patents
A kind of direct-current charging post high accuracy number metering device Download PDFInfo
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- CN109490619A CN109490619A CN201811189637.4A CN201811189637A CN109490619A CN 109490619 A CN109490619 A CN 109490619A CN 201811189637 A CN201811189637 A CN 201811189637A CN 109490619 A CN109490619 A CN 109490619A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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Abstract
The invention discloses a kind of direct-current charging post high accuracy number metering devices.It includes high-precision fluxgate current sensor, operational amplification circuit, precision resistance bleeder circuit, voltage and current signal conditioning circuit, electrical energy measurement unit, telecommunication circuit and power circuit, the output end of high-precision fluxgate current sensor is electrically connected with the input terminal of operational amplification circuit, precision resistance bleeder circuit is electrically connected with the positive and negative anodes output end of direct-current charging post respectively, the current signal input of voltage and current signal conditioning circuit is electrically connected with the output end of operational amplification circuit, the voltage signal inputs of voltage and current signal conditioning circuit are electrically connected with the output end of precision resistance bleeder circuit, electrical energy measurement unit respectively with telecommunication circuit, the output end of voltage and current signal conditioning circuit is electrically connected.The present invention can be completed at the same time the work of voltage and current acquisition and metering, improve measuring accuracy, and small in size, higher installation convenience and electrical safety performance with metering device.
Description
Technical field
The present invention relates to charging pile field of measuring techniques more particularly to a kind of direct-current charging post high accuracy number metering dresses
It sets.
Background technique
With electrical energy measurement structure design philosophy and method continuously improve and the application of new and high technology, DC charging
DC measurement problem encountered in stake attracts attention extensively.
The combination of electric energy meter and current divider is generally required for the electrical energy measurement of direct-current charging post at present to complete voltage electricity
The acquisition of stream and electrical energy measurement, but general direct current energy meter measurement range is smaller, and the precision measured is inadequate, and current divider is logical
It can cause surface heat phenomenon when the super-high-current time is longer again, cause current detecting obvious errors occur, and then reduce metering
Accuracy.
Summary of the invention
In order to solve the above technical problems, The present invention provides a kind of direct-current charging post high accuracy number metering device,
It can be completed at the same time the work of voltage and current acquisition and metering, improve measuring accuracy, and have metering device small in size, higher
Convenience and electrical safety performance are installed.
To solve the above-mentioned problems, the present invention is achieved by the following scheme:
A kind of direct-current charging post high accuracy number metering device of the invention, including high-precision fluxgate current sensor, operation
Amplifying circuit, precision resistance bleeder circuit, voltage and current signal conditioning circuit, electrical energy measurement unit, telecommunication circuit and power supply electricity
The output end on road, the high-precision fluxgate current sensor is electrically connected with the input terminal of operational amplification circuit, the accurate electricity
Two input terminals of resistance bleeder circuit are electrically connected with the cathode output end of direct-current charging post, cathode output end respectively, the voltage
The current signal input of current signal conditioning circuit is electrically connected with the output end of operational amplification circuit, the voltage and current signal
The voltage signal inputs of conditioning circuit are electrically connected with the output end of precision resistance bleeder circuit, the electrical energy measurement unit difference
It is electrically connected with the output end of telecommunication circuit, voltage and current signal conditioning circuit, electrode input end, the cathode of the power circuit are defeated
Enter end to be electrically connected with the cathode output end of direct-current charging post, cathode output end respectively, four output ends point of the power circuit
Not with the power end of operational amplification circuit, the power end of voltage and current signal conditioning circuit, electrical energy measurement unit power end, logical
Believe the power end electrical connection of circuit.
In the present solution, the DC voltage that direct-current charging post exports is converted to each component needs of metering device by power circuit
Low-voltage dc voltage, give metering device power supply.Telecommunication circuit is for sending the energy data that electrical energy measurement unit measures to
The external equipments such as display.
The output line that charging gun is connected on direct-current charging post passes through the coil of high-precision fluxgate current sensor, works as charging
When rifle is inserted into electric car to electric car charging, high-precision fluxgate current sensor generates secondary electrical by magnetic induction technology
Signal, electric signal amplify by operational amplification circuit, are output to electrical energy measurement unit after the conditioning of voltage and current signal conditioning circuit,
Electrical energy measurement unit calculates the current value of direct-current charging post output；Precision resistance bleeder circuit exports direct-current charging post straight
It is output to current voltage signal conditioning circuit after stream voltage, is output to electric energy meter after the conditioning of current voltage signal conditioning circuit
Unit is measured, electrical energy measurement unit calculates the voltage value of direct-current charging post output；Electrical energy measurement unit is according to current value, voltage value
Carry out electrical energy measurement.
Preferably, the telecommunication circuit provides TTL communication interface, using standard MODBUS-RTU agreement.
Preferably, the telecommunication circuit is also electrically connected with the display device of direct-current charging post.Telecommunication circuit is by electric energy meter
The energy data of amount unit metering is sent to display device and shows.
Preferably, the telecommunication circuit is electrically connected by the Shielded Twisted Pair with copper mesh with electrical energy measurement unit.
Preferably, the line footpath of the Shielded Twisted Pair is not less than 0.5mm.
Preferably, the telecommunication circuit includes wireless communication module.Remote terminal can be sent by continuous data, moreover it is possible to
Make metering device that can carry out remote control.
The beneficial effects of the present invention are: the work of voltage and current acquisition and metering can be completed at the same time, measuring accuracy is improved,
And small in size, higher installation convenience and electrical safety performance with metering device.
Detailed description of the invention
Fig. 1 is circuit theory connection block diagram of the invention；
Fig. 2 is the circuit diagram of voltage and current signal conditioning circuit；
Fig. 3 is the circuit diagram of electrical energy measurement unit；
Fig. 4 is the circuit diagram of telecommunication circuit；
Fig. 5 is the circuit diagram of power circuit.
In figure: 1, high-precision fluxgate current sensor, 2, operational amplification circuit, 3, precision resistance bleeder circuit, 4, electricity
Current voltage signal conditioning circuit, 5, electrical energy measurement unit, 6, telecommunication circuit, 7, power circuit, 8, display device, 9, DC charging
Stake, 10, electric car.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: a kind of direct-current charging post high accuracy number metering device of the present embodiment, as shown in Figure 1, including high-precision
Spend fluxgate current sensor 1, operational amplification circuit 2, precision resistance bleeder circuit 3, voltage and current signal conditioning circuit 4, electricity
Energy metering units 5, telecommunication circuit 6 and power circuit 7, output end and the operation amplifier electricity of high-precision fluxgate current sensor 1
The input terminal on road 2 is electrically connected, two input terminals of precision resistance bleeder circuit 3 respectively with the cathode output end of direct-current charging post 9,
Cathode output end electrical connection, the current signal input of voltage and current signal conditioning circuit 4 and the output end of operational amplification circuit 2
Electrical connection, the output end of the voltage signal inputs and precision resistance bleeder circuit 3 of voltage and current signal conditioning circuit 4 are electrically connected
It connects, electrical energy measurement unit 5 is electrically connected with the output end of telecommunication circuit 6, voltage and current signal conditioning circuit 4 respectively, power circuit 7
Electrode input end, negative input be electrically connected respectively with the cathode output end of direct-current charging post 9, cathode output end, power supply electricity
Four output ends on road 7 respectively with the power end of operational amplification circuit 2, the power end of voltage and current signal conditioning circuit 4, electric energy
The power end electrical connection of the power end, telecommunication circuit 6 of metering units 5.
The circuit diagram of voltage and current signal conditioning circuit, as shown in Figure 2；The circuit diagram of electrical energy measurement unit,
As shown in Figure 3；The circuit diagram of telecommunication circuit, as shown in Figure 4；The circuit diagram of power circuit, as shown in Figure 5.
In the present solution, the DC voltage that direct-current charging post exports is converted to each component needs of metering device by power circuit
Low-voltage dc voltage, give metering device power supply.Telecommunication circuit is for sending the energy data that electrical energy measurement unit measures to
The external equipments such as display.
The output line that charging gun is connected on direct-current charging post 9 passes through the coil of high-precision fluxgate current sensor 1, when filling
When electric rifle insertion electric car 10 charges to electric car, high-precision fluxgate current sensor 1 is generated by magnetic induction technology
Secondary electric signal, electric signal amplifies by operational amplification circuit 2, voltage and current signal conditioning circuit 4 is output to electric energy after improving
Metering units 5, electrical energy measurement unit calculate the current value of direct-current charging post output；Precision resistance bleeder circuit is by DC charging
It is output to current voltage signal conditioning circuit after the DC voltage partial pressure of stake output, it is defeated after the conditioning of current voltage signal conditioning circuit
Electrical energy measurement unit is arrived out, and electrical energy measurement unit calculates the voltage value of direct-current charging post output；Electrical energy measurement unit is according to electricity
Flow valuve, voltage value carry out electrical energy measurement.
Telecommunication circuit 6 provides TTL communication interface, using standard MODBUS-RTU agreement.High-precision fluxgate current sense
Device is Zero flux formula Hall current sensor.Telecommunication circuit 6 passes through 5 electricity of Shielded Twisted Pair and electrical energy measurement unit with copper mesh
Connection.The line footpath of Shielded Twisted Pair is not less than 0.5mm.
Telecommunication circuit 6 is also electrically connected with the display device 8 of direct-current charging post 9.Telecommunication circuit measures electrical energy measurement unit
Energy data be sent to display device and show.
Telecommunication circuit 6 includes wireless communication module.Wireless communication module can send remote terminal for continuous data, moreover it is possible to
Make metering device that can carry out remote control.
Claims (6)
1. a kind of direct-current charging post high accuracy number metering device, which is characterized in that including high-precision fluxgate current sensor
(1), operational amplification circuit (2), precision resistance bleeder circuit (3), voltage and current signal conditioning circuit (4), electrical energy measurement unit
(5), telecommunication circuit (6) and power circuit (7), the output end and operation amplifier of the high-precision fluxgate current sensor (1)
The input terminal of circuit (2) is electrically connected, two input terminals of the precision resistance bleeder circuit (3) respectively with direct-current charging post (9)
Cathode output end, cathode output end electrical connection, the current signal input and fortune of the voltage and current signal conditioning circuit (4)
Calculate the output end electrical connection of amplifying circuit (2), the voltage signal inputs and precision of the voltage and current signal conditioning circuit (4)
The output end of resistor voltage divider circuit (3) is electrically connected, and the electrical energy measurement unit (5) is believed with telecommunication circuit (6), voltage and current respectively
The output end electrical connection of number conditioning circuit (4), the electrode input end of the power circuit (7), negative input respectively with direct current
The cathode output end of charging pile (9), cathode output end electrical connection, four output ends of the power circuit (7) respectively with operation
The power end of amplifying circuit (2), the power end of voltage and current signal conditioning circuit (4), electrical energy measurement unit (5) power end,
The power end of telecommunication circuit (7) is electrically connected.
2. a kind of direct-current charging post high accuracy number metering device according to claim 1, which is characterized in that the communication
Circuit (6) provides TTL communication interface, using standard MODBUS-RTU agreement.
3. a kind of direct-current charging post high accuracy number metering device according to claim 1, which is characterized in that the communication
Circuit (6) is also electrically connected with the display device (8) of direct-current charging post (9).
4. a kind of direct-current charging post high accuracy number metering device according to claim 1 or 2 or 3, which is characterized in that institute
Telecommunication circuit (6) is stated to be electrically connected by the Shielded Twisted Pair with copper mesh with electrical energy measurement unit (5).
5. a kind of direct-current charging post high accuracy number metering device according to claim 4, which is characterized in that the shielding
The line footpath of twisted pair is not less than 0.5mm.
6. a kind of direct-current charging post high accuracy number metering device, feature described according to claim 1 or 2 or 3 or 4 or 5
It is, the telecommunication circuit (6) includes wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189637.4A CN109490619A (en) | 2018-10-12 | 2018-10-12 | A kind of direct-current charging post high accuracy number metering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189637.4A CN109490619A (en) | 2018-10-12 | 2018-10-12 | A kind of direct-current charging post high accuracy number metering device |
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| CN109490619A true CN109490619A (en) | 2019-03-19 |
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| CN201811189637.4A Pending CN109490619A (en) | 2018-10-12 | 2018-10-12 | A kind of direct-current charging post high accuracy number metering device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907698A (en) * | 2019-11-22 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Electric energy metering device for direct current distribution network |
| CN111319486A (en) * | 2020-03-11 | 2020-06-23 | 国网浙江省电力有限公司电力科学研究院 | Charging gun with charging control and metering functions |
| CN111562435A (en) * | 2020-05-28 | 2020-08-21 | 南京国信能源有限公司 | Novel fill electric pile with direct current electric energy meter |
| CN111722044A (en) * | 2020-06-29 | 2020-09-29 | 国网山东省电力公司电力科学研究院 | Direct current charging pile testing method, device and equipment based on frequency sweep calibration shunt |
| CN112630492A (en) * | 2020-11-27 | 2021-04-09 | 中国电力科学研究院有限公司 | Electric energy metering device and method for electric automobile charging pile |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205484550U (en) * | 2016-02-29 | 2016-08-17 | 贵州兆浪科技实业有限公司 | A electric energy measurement system for electric automobile fills electric pile |
| CN205706229U (en) * | 2016-06-29 | 2016-11-23 | 南京舜唐科技有限公司 | A kind of alternating-current charging pile device integrating electric energy metrical |
| CN106771576A (en) * | 2016-11-08 | 2017-05-31 | 南京能瑞自动化设备股份有限公司 | A kind of direct current energy meter for charging pile with Insulation monitoring function |
| CN206863116U (en) * | 2017-05-16 | 2018-01-09 | 上海亚锐电子科技有限公司 | Direct current multifunctional electric energy meter |
| CN107765149A (en) * | 2017-10-13 | 2018-03-06 | 上海钛昕电气科技有限公司 | The insulation detection device of integrated multifunction |
| CN108169552A (en) * | 2018-01-02 | 2018-06-15 | 华立科技股份有限公司 | Direct current energy meter and direct current energy metering device based on tunnel type magneto-resistor |
| CN209117742U (en) * | 2018-10-12 | 2019-07-16 | 国网浙江省电力有限公司丽水供电公司 | A kind of direct-current charging post high accuracy number metering device |
-
2018
- 2018-10-12 CN CN201811189637.4A patent/CN109490619A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205484550U (en) * | 2016-02-29 | 2016-08-17 | 贵州兆浪科技实业有限公司 | A electric energy measurement system for electric automobile fills electric pile |
| CN205706229U (en) * | 2016-06-29 | 2016-11-23 | 南京舜唐科技有限公司 | A kind of alternating-current charging pile device integrating electric energy metrical |
| CN106771576A (en) * | 2016-11-08 | 2017-05-31 | 南京能瑞自动化设备股份有限公司 | A kind of direct current energy meter for charging pile with Insulation monitoring function |
| CN206863116U (en) * | 2017-05-16 | 2018-01-09 | 上海亚锐电子科技有限公司 | Direct current multifunctional electric energy meter |
| CN107765149A (en) * | 2017-10-13 | 2018-03-06 | 上海钛昕电气科技有限公司 | The insulation detection device of integrated multifunction |
| CN108169552A (en) * | 2018-01-02 | 2018-06-15 | 华立科技股份有限公司 | Direct current energy meter and direct current energy metering device based on tunnel type magneto-resistor |
| CN209117742U (en) * | 2018-10-12 | 2019-07-16 | 国网浙江省电力有限公司丽水供电公司 | A kind of direct-current charging post high accuracy number metering device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907698A (en) * | 2019-11-22 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Electric energy metering device for direct current distribution network |
| CN110907698B (en) * | 2019-11-22 | 2021-11-09 | 国网浙江省电力有限公司营销服务中心 | Electric energy metering device for direct current distribution network |
| CN111319486A (en) * | 2020-03-11 | 2020-06-23 | 国网浙江省电力有限公司电力科学研究院 | Charging gun with charging control and metering functions |
| CN111562435A (en) * | 2020-05-28 | 2020-08-21 | 南京国信能源有限公司 | Novel fill electric pile with direct current electric energy meter |
| CN111722044A (en) * | 2020-06-29 | 2020-09-29 | 国网山东省电力公司电力科学研究院 | Direct current charging pile testing method, device and equipment based on frequency sweep calibration shunt |
| CN112630492A (en) * | 2020-11-27 | 2021-04-09 | 中国电力科学研究院有限公司 | Electric energy metering device and method for electric automobile charging pile |
| CN112630492B (en) * | 2020-11-27 | 2024-02-09 | 中国电力科学研究院有限公司 | Electric energy metering device and method for electric automobile charging pile |
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Application publication date: 20190319 |