CN112327050B - External plug-in integrated metering device for non-vehicle charger - Google Patents

External plug-in integrated metering device for non-vehicle charger Download PDF

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Publication number
CN112327050B
CN112327050B CN202110015807.2A CN202110015807A CN112327050B CN 112327050 B CN112327050 B CN 112327050B CN 202110015807 A CN202110015807 A CN 202110015807A CN 112327050 B CN112327050 B CN 112327050B
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charging
current
electric energy
metering
metering unit
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CN112327050A (en
Inventor
李贺龙
卢达
林繁涛
陈昊
于海波
王春妍
王春雨
刘佳
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China Electric Power Research Institute Co Ltd CEPRI
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China Electric Power Research Institute Co Ltd CEPRI
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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
    • G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • B60L53/665—Methods related to measuring, billing or payment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The invention discloses an external plug-in type integrated metering device for a non-vehicle-mounted charger, which comprises: a charging terminal module connected to the vehicle; the power taking end module is connected with the non-vehicle-mounted charger body; a multi-core cable; a metering unit; one end of the multi-core cable is connected with the charging end module; the other end of the multi-core cable is connected with the metering unit; the metering unit is also connected with the power taking end module; the metering unit is used for metering the electric energy charged to the vehicle through the multi-core cable. The device can conveniently with fill the electric pile separation, realize forcing the examination in batches in the calibration mechanism is concentrated, reduced the examination work degree of difficulty, improved examination efficiency.

Description

External plug-in integrated metering device for non-vehicle charger
Technical Field
The invention belongs to the technical field of electric energy metering, and particularly relates to an external plug-in type integrated metering device for an off-board charger.
Background
In 11 months in 2019, the electric automobile charging pile is listed in a national compulsory verification catalogue as a metering device for trade settlement, and provides higher requirements for fairness and justice of charging pile metering and higher requirements for operation and maintenance of the charging pile.
Electric automobile fills electric pile all adopts the electric energy metering device of installing inside it in the existing market. The built-in metering device has the following problems, which cause the forced verification work to be difficult and low in efficiency:
1. the operation and maintenance are inconvenient to verify. The operation and maintenance of the charging pile relate to a plurality of professional operations such as communication, electricity, machinery and metering. The metering device and the charging pile are installed in a mixed mode, and when the work such as verification, operation and maintenance is carried out, multiple professionals need to be coordinated and located on the spot at the same time, so that the work is not facilitated to be carried out efficiently;
2. it is difficult to provide a lead seal for the metering device. Metering devices such as an electric energy meter and a current divider are dispersedly arranged inside the charging pile, so that the overall sealing is inconvenient, and the metering device is difficult to prevent from being maliciously adjusted, so that the accuracy is not consistent with the nominal accuracy;
3. the verification efficiency is low. Metering device is built-in, installs in the inside of filling electric pile, and the dismouting is wasted time and energy, is difficult to realize automatic examination in batches.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an external plug-in type integrated metering device for an off-board charging machine, which aims to solve the problems of high difficulty and low efficiency of the metering and verification work of the existing off-board charging machine.
The invention provides an external plug-in type integrated metering device for a non-vehicle-mounted charger, which comprises:
a charging terminal module connected to the vehicle;
the power taking end module is connected with the non-vehicle-mounted charger body;
a multi-core cable;
a metering unit;
the charging end module, the power taking end module, the multi-core cable and the metering unit are arranged outside the off-board charger body;
one end of the multi-core cable is connected with the charging end module;
the other end of the multi-core cable is connected with the metering unit;
the metering unit is also connected with the power taking end module;
the charging end module is a quick-change aerial plug matched with the multi-core cable;
the power taking end module is a quick-change aerial plug matched with the off-board charger body;
the metering unit is used for metering the electric energy charged to the vehicle through the multi-core cable.
Specifically, the multi-core cable comprises a direct current charging positive bus and a direct current charging negative bus;
the multi-core cable further comprises a direct-current voltage sampling line, and the direct-current voltage sampling line is respectively connected with the direct-current charging positive bus and the direct-current charging negative bus close to the charging end module;
the metering unit comprises a voltage sampling module used for acquiring a voltage signal from the direct-current voltage sampling line and determining the current charging voltage value.
In particular, the metering unit further comprises a housing;
the metering unit also comprises a zero-flux transformer, a built-in direct-current charging positive bus and a built-in direct-current charging negative bus which are arranged in the inner cavity of the shell;
the zero magnetic flux mutual inductor is sleeved on the built-in direct current charging positive bus or the built-in direct current charging negative bus;
the metering unit further comprises a current sampling module which is used for acquiring a current signal from the zero-flux transformer and determining the current charging current value.
Specifically, the metering unit further comprises an electric energy metering module, which is used for determining the current charging power and/or the current charging electric energy according to the acquired charging current value and charging voltage value;
the power taking end module is connected with a built-in communication cable;
the metering unit further comprises a communication module which is used for sending the charging current value, the charging voltage value, the charging power and/or the charging electric energy to a charge settlement module arranged in the off-board charger body through the built-in communication cable.
Specifically, the metering unit further comprises a pulse output interface, wherein the pulse output interface extends out of the shell and is used for connecting metrological verification equipment;
the metering unit also comprises a pulse output module which is used for calculating the pulse number according to the acquired charging electric energy and outputting a pulse signal corresponding to the pulse number through the pulse output interface;
the metering verification equipment determines actual charging electric energy corresponding to the pulse signal according to the pulse signal received through the pulse output interface;
and the metering verification equipment is also used for judging whether the integrated metering device is qualified in verification or not according to the charging electric energy acquired from the metering unit and the actual charging electric energy.
Specifically, the multi-core cable further comprises a low-voltage auxiliary power supply positive bus and a low-voltage auxiliary power supply negative bus;
the low-voltage auxiliary power supply positive bus and the low-voltage auxiliary power supply negative bus are connected with the charging end module;
the low-voltage auxiliary power supply positive bus and the low-voltage auxiliary power supply negative bus are also connected with the power taking end module;
the metering unit further comprises a power management module, and the power management module converts electric energy obtained from the positive bus of the low-voltage auxiliary power supply and the negative bus of the low-voltage auxiliary power supply into weak direct current and weak alternating current respectively to supply power to the metering unit.
Specifically, the metering unit further comprises a storage unit;
the storage unit is used for storing a charging current value, a charging voltage value, charging power and/or charging electric energy;
the storage unit is also used for storing the charging electric energy for metrological verification, the actual charging electric energy, the pulse constant and a metrological verification conclusion.
Specifically, the outer part of the shell is provided with a plurality of lead sealing points.
Specifically, the charging end module is a quick-change aerial plug matched with the multi-core cable.
Specifically, the power taking end module is a quick-change aerial plug matched with the multi-core cable.
Metrological verification equipment the external plug-in type integrated metering device for the non-vehicle-mounted charger provided by the invention can be conveniently separated from the non-vehicle-mounted charger body, and forced verification is realized in a centralized and batch manner by a verification mechanism, so that the verification work difficulty is reduced, and the verification efficiency is improved.
The external plug-in type integrated metering device provided by the invention has a uniform appearance and interface, is easy to automatically calibrate through an automatic calibrating device, and can save a large amount of manpower, material resources and financial resources for the electric energy metering and calibrating business of the off-board charger.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic composition diagram of an external plug-in type integrated metering device for an off-board charger according to a preferred embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a voltage sampling module of an external plug-in type integrated metering device for an off-board charger according to a preferred embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a current sampling module of an external plug-in type integrated metering device for an off-board charger according to a preferred embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a part of a power management module of an external plug-in integrated metering device for an off-board charger according to a preferred embodiment of the present invention;
fig. 5 is a pin diagram of AD analog-to-digital conversion of the external plug-in integrated metering device for the off-board charger according to the preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The electric energy metering device of the existing charging pile has the following problems:
1) the metering device and the charging pile are integrally installed, so that metering verification and maintenance are inconvenient;
2) when the metrological verification tests the working error, the cabinet needs to be opened to connect the pulse signal;
3) the metering device is arranged inside the charging pile, so that sealing is not easy to occur;
4) the parameters (measuring range and parameter transformation ratio) and the appearance of the electric energy meter are not uniform, and spare parts are difficult to prepare for maintenance.
In addition, the charging voltage value and the charging current value of the electric energy measurement basis of the off-board charger (comprising a fixedly arranged direct current charging pile body and a charging gun with a free end) in the market are obtained from a cable positioned in the charging pile body. That is, the metering point is located on the cable before the electrical energy enters the charging gun. And then, the direct current electric energy is transmitted to the vehicle through a charging gun cable to charge the in-vehicle battery, and the vehicle energy taking point is arranged at the tail end of the charging gun.
The metering point setting scheme ignores the voltage drop of the direct current voltage between the metering point and the vehicle energy taking point. And under the condition that a compensation mechanism is not additionally arranged, the electric energy loss along the charging gun is borne by the vehicle owner.
As shown in fig. 1, the external plug-in integrated metering device for the off-board charger provided by the invention comprises:
a charging terminal module connected to the vehicle;
the power taking end module is connected with the non-vehicle-mounted charger body;
a multi-core cable;
a metering unit;
the charging end module, the power taking end module, the multi-core cable and the metering unit are arranged outside the off-board charger body;
one end of the multi-core cable is connected with the charging end module;
the other end of the multi-core cable is connected with the metering unit;
the metering unit is also connected with the power taking end module;
the charging end module is a quick-change aerial plug matched with the multi-core cable;
the power taking end module is a quick-change aerial plug matched with the off-board charger body;
the metering unit is used for metering the electric energy charged to the vehicle through the multi-core cable.
The external plug-in integrated metering device for the non-vehicle-mounted charger serves as a novel charging gun with an electric energy metering function and is connected with a vehicle and the non-vehicle-mounted charger body through a power taking end module and a charging end module respectively.
The external plug-in integrated metering device for the non-vehicle-mounted charger can be conveniently separated from the non-vehicle-mounted charger body, and forced verification is realized in a centralized and batch manner by a verification mechanism, so that the verification work difficulty is reduced, and the verification efficiency is improved.
Specifically, the metering unit sends the metered electric energy data (namely, the electric energy charged to the vehicle through the multi-core cable) to a charge settlement module in the non-vehicle-mounted charger body, so that the charge settlement module settles the charging charge of the vehicle according to the metered electric energy data.
Specifically, the multi-core cable comprises a direct current charging positive bus and a direct current charging negative bus;
the multi-core cable further comprises a direct-current voltage sampling line, and the direct-current voltage sampling line is respectively connected with the direct-current charging positive bus and the direct-current charging negative bus close to the charging end module;
the metering unit comprises a voltage sampling module used for acquiring a voltage signal from the direct-current voltage sampling line and determining the current charging voltage value.
In particular, the metering unit further comprises a housing;
the metering unit also comprises a zero-flux transformer, a built-in direct-current charging positive bus and a built-in direct-current charging negative bus which are arranged in the inner cavity of the shell;
the zero magnetic flux mutual inductor is sleeved on the built-in direct current charging positive bus or the built-in direct current charging negative bus;
the metering unit further comprises a current sampling module which is used for acquiring a current signal from the zero-flux transformer and determining the current charging current value.
Specifically, the built-in direct current charging positive electrode bus or the built-in direct current charging negative electrode bus is arranged in a shell of the metering unit. Specifically, the metering unit further comprises an electric energy metering module, which is used for determining the current charging power and/or the current charging electric energy according to the acquired charging current value and charging voltage value;
the power taking end module is connected with a built-in communication cable;
the metering unit further comprises a communication module which is used for sending the charging current value, the charging voltage value, the charging power and/or the charging electric energy to a charge settlement module arranged in the off-board charger body through the built-in communication cable.
Specifically, the built-in communication cable is arranged in the body of the off-board charger. Specifically, the metering unit further comprises a pulse output interface, wherein the pulse output interface extends out of the shell and is used for connecting metrological verification equipment;
the metering unit also comprises a pulse output module which is used for calculating the pulse number according to the acquired charging electric energy and outputting a pulse signal corresponding to the pulse number through the pulse output interface;
the metering verification equipment determines actual charging electric energy corresponding to the pulse signal according to the pulse signal received through the pulse output interface;
and the metering verification equipment is also used for judging whether the integrated metering device is qualified in verification or not according to the charging electric energy acquired from the metering unit and the actual charging electric energy.
Specifically, the multi-core cable further comprises a low-voltage auxiliary power supply positive bus and a low-voltage auxiliary power supply negative bus;
the low-voltage auxiliary power supply positive bus and the low-voltage auxiliary power supply negative bus are connected with the charging end module;
the low-voltage auxiliary power supply positive bus and the low-voltage auxiliary power supply negative bus are also connected with the power taking end module;
the metering unit further comprises a power management module, and the power management module converts electric energy obtained from the positive bus of the low-voltage auxiliary power supply and the negative bus of the low-voltage auxiliary power supply into weak direct current and weak alternating current respectively to supply power to the metering unit.
Specifically, the metering unit further comprises a storage unit;
the storage unit is used for storing a charging current value, a charging voltage value, charging power and/or charging electric energy;
the storage unit is also used for storing the charging electric energy for metrological verification, the actual charging electric energy, the pulse constant and a metrological verification conclusion.
Specifically, the outer part of the shell is provided with a plurality of lead sealing points.
Specifically, the charging end module is a quick-change aerial plug matched with the multi-core cable.
Specifically, the power taking end module is a quick-change aerial plug matched with the multi-core cable, that is, a charging aerial plug connected with the non-vehicle-mounted charger body as shown in fig. 1. It should be understood that the external plug-in integrated electric energy metering device totally relates to 3 quick-change aerial plugs, and is manufactured and customized by adopting the method disclosed in the prior art.
The external plug-in type integrated electric energy metering device realizes miniaturization and integration, and is convenient for integrated installation with a non-vehicle-mounted charger body; a voltage sampling point is arranged at one end of the charging gun close to the vehicle, and the metering unit is arranged between the charging gun and the non-vehicle-mounted charger body and independently leads out an input pulse interface; the metering unit is connected with the vehicle and the off-board charger by adopting customized multi-core quick aerial plug.
When the voltage measuring device is specifically implemented, a voltage sampling module, a current sampling module, an electric energy measuring module, a pulse output interface and a communication module in the measuring unit are all connected with a CPU or a processor of a single chip microcomputer or an MCU and the like, and the functions of the voltage measuring module, the current sampling module, the electric energy measuring module, the pulse output interface and the communication module are realized by the processor executing corresponding software codes.
And each module in the metering unit is correspondingly connected with a single chip microcomputer or a peripheral circuit of the MCU for voltage magnitude conversion, optical coupling isolation, signal noise elimination and the like so as to realize I/O signal input and output and data acquisition.
This external plug-in integration electric energy metering device for electric automobile's non-vehicle machine that charges possesses following characteristics:
1) the electric energy metering device is separated from the interior of the non-vehicle-mounted charger, and the electric energy metering device is convenient to meter and verify.
2) The electric energy metering device is provided with an independent pulse interface, so that pulse signals can be conveniently acquired, and a standard meter method is adopted to verify the electric energy metering device;
3) the electric energy metering device is externally provided with a user or verification mechanism visible seal and verification marks, so that the possibility of cheating on charging by modifying the metering device is eliminated;
4) this adopt plug-in design, easy dismounting is convenient for pull back at the calibration mechanism with dispersedly concentrating on a batch examination.
The external plug-in type integrated metering device can be used for newly building piles, and the conversion prospect is considerable.
The external plug-in integrated metering device can be directly used for modifying stock piles, only the charging gun of the stock piles needs to be replaced by the external plug-in integrated metering device, modification can be achieved, the non-vehicle-mounted charger body does not need to be replaced, and modification cost is low.
This external plug-in integration metering device, its electric energy measurement voltage acquisition point sets up at the end of rifle that charges, can reach following mesh:
1) the electric energy metering and the non-vehicle-mounted charger body are separated, so that the management of the electric energy metering of the non-vehicle-mounted charger is facilitated.
2) The method can be used for individual and periodic metrological verification and is suitable for various metrological verification methods.
3) The seal and verification label of the metering device are visible to the user, so that the cheating possibility of operators and manufacturers on metering and charging is effectively avoided.
Different from the prior art that the metering unit is powered by alternating current arranged in the non-vehicle-mounted charger body, the metering unit is powered by a low-voltage auxiliary power line in a charging gun cable. The low-voltage auxiliary power line is led from a low-voltage auxiliary power supply arranged in the body of the off-board charger. The low voltage auxiliary power supply is designed to activate the vehicle circuit after the vehicle is plugged in with a gun. The power supply of the metering unit is led from the low-voltage auxiliary power line in the charging gun cable, so that the metering unit obtains electric energy from the low-voltage auxiliary power source only after the charging gun is connected with a vehicle, and the metering function is started, thereby saving the energy consumption during standby. That is, the metering device is started only when the vehicle is charged, and is in standby when the vehicle is not charged.
Specifically, the electric energy metering device comprises a power panel, which converts a 12V input obtained from a low-voltage auxiliary power supply into a 12V output (namely weak alternating current) and a 5V output (namely weak direct current), and supplies power to the metering unit as a whole, such as a CPU (for +/-12V) and a current sensor (for +/-12V).
Specifically, the electric energy metering device communicates with a charge settlement module in a non-vehicle charger body by using a CAN communication module.
Specifically, the fee settlement module is arranged on a main control board in the off-board charger body and realizes fee settlement according to received charging electric energy data.
In specific implementation, a schematic diagram of the external plug-in integrated electric energy metering device in which a charging gun, a metering unit and an off-board charger body are separately arranged is shown in fig. 1.
A voltage sampling point is arranged in a charging gun in the external plug-in integrated electric energy metering device, the voltage sampling point is arranged at the tail end of the direct current electric energy before entering a vehicle, and the collected direct current voltage is transmitted to a metering unit through the voltage sampling point.
It should be understood that the voltage sampling points, together with other cables, are collectively connected by a class 3 custom multi-core aerial plug as connectors to the non-onboard charger body, the metering unit, and the vehicle charging port, respectively.
When the metering system is specifically implemented, the tail end of a charging gun with the metering function is connected with an electric automobile; the head end of the charging gun with the metering function is connected with the non-vehicle-mounted charger body 1.
The metering device comprises: the power supply management module, the pulse output circuit, the data management module, the voltage signal sampling circuit, the signal isolation circuit, the current signal sampling circuit and the mainboard CPU; the metering function and the verification function are completed in a mainboard CPU.
The off-board charger body is used for providing a direct-current power supply.
Multicore cable, also be the connecting cable that charges when charging, with non-vehicle machine body and the electric automobile connection that charges, include: electric energy output cables, control cables, communication cables and the like; the control cable relates to connection confirmation of the charging gun, and is respectively provided with control cables such as S +, S-, CC1, CC2 and an electronic lock; the communication cable relates to an interactive message between an off-board charger and a vehicle and an interactive message between a metering unit and a charging controller, which are specified by a communication protocol between the off-board charger and a battery management system of the electric vehicle, of GB/T27930-2015.
The input end of the power management module is connected with an auxiliary power supply S + and S-in the cable; the output of the power management module is: 12V or 5V direct current respectively supplies power to the sensor and the CPU.
The pulse output circuit converts the pulse number into a pulse signal and outputs the pulse signal through the pulse output interface.
When the main board CPU is used for measuring the electric energy, calculating the electric energy value through the voltage value and the current value; and when the metering is detected, the CPU of the mainboard calculates the currently detected charging electric energy according to the pulse constant and converts the charging electric energy into the pulse number.
It should be understood that the pulse constant of the external plug-in integrated electric energy metering device is generally fixed and constant.
When the integrated electric energy metering device is verified by a standard meter method, the standard electric energy meter and the detected off-board charger are controlled to be in working states respectively; and determining the verification error of the detected integrated electric energy metering device by comparing the charging electric energy corresponding to the pulse signal output by the pulse output port of the detected integrated electric energy metering device with the actual charging electric energy metered by the standard electric energy meter, and judging whether the integrated metering device is qualified in verification.
The data management module is used for storing the acquired data such as voltage, current, electric energy, pulse number and the like; the data management module is also used for sending the acquired data such as voltage, current, electric energy, pulse number and the like to a charge settlement module in the off-board charger body through the communication module so as to enable an off-board charger management unit to carry out data statistics; the data management module is also used for communicating with the charging control board/charging controller through the communication module.
The charging voltage is the direct current voltage on the direct current bus during charging; the charging current is the direct current on the direct current bus during charging.
As shown in fig. 2, the voltage signal sampling circuit sends the obtained charging voltage signal to the signal isolation circuit after the voltage division circuit and the isolation. That is, no voltage transformer is provided. The charging voltage signal is directly input into the voltage signal sampling circuit.
The voltage signal sampling circuit uses a precision platinum resistor to replace the traditional precision resistor; because the measurement error of the precision platinum resistor is as low as within 0.05% in the temperature range of-40 ℃ to +85 ℃, and compared with the common precision resistor, the precision is higher, the temperature drift is smaller, and the temperature drift is as low as 1 ppm/DEG C, wherein the unit ppm/DEG C represents the change of several parts per million per degree. When the field environment temperature of the off-board charger exceeds 70 ℃, the precision drift does not exceed 0.1%.
The voltage signal sampling circuit adopts a precision platinum resistor to replace a traditional precision resistor, the precision is higher, the temperature drift is smaller, and the precision drift of the resistor can not exceed 0.1% when the temperature range of the field environment of the off-board charger exceeds 70 ℃.
As shown in fig. 3, the current signal sampling circuit obtains a current signal from a current sensor sleeved on the dc charging positive bus cable or the dc charging negative bus cable, and converts the signal into a digital signal required for acquisition through the current signal sampling circuit, and sends the digital signal to the signal isolation circuit.
Specifically, J2 on the left side of fig. 3 is connected to the output of the current sensor. The current signal sampling circuit is connected with the zero magnetic flux transformer; the temperature-controlled water heater has a super-wide working temperature range (-40 ℃ to +85 ℃) and the temperature drift is as low as 1-5 ppm/DEG C, wherein the unit ppm/DEG C represents the change of several parts per million per degree.
The current signal sampling circuit adopts a zero-flux transformer, has an ultra-wide working temperature range, is internally shielded to improve the capacity of resisting external interference, and can effectively improve the accuracy of measured data.
The zero-flux transformer adopts a mode that a bus directly penetrates, no power loss exists, shielding is arranged in the zero-flux transformer, the external interference resistance can be improved, and the accuracy of measured data is ensured to a great extent.
When the temperature of the zero-flux transformer is close to 25 ℃, the measurement error is less than 0.07 percent. In the field environment temperature range (such as-40-85 ℃) of the non-vehicle-mounted charger, the measurement error value does not exceed 0.12%. The zero-flux transformer is used as a current acquisition sensitive device, so that the influence of temperature on the accuracy of test data can be effectively reduced, and the working condition of a field is met.
During specific implementation, the zero magnetic flux transformer is fixedly arranged in a shell of the metering device, and a bus cable of the direct-current charging circuit penetrates through the zero magnetic flux transformer. Since various noises loaded on the voltage and current signals will cause great interference to the detection of the signals when the voltage and current signals are generally sampled, the analog quantity is subjected to denoising processing by the signal isolation circuit 8 before AD input, and low-pass filtering is added.
The signal isolation circuit is used for denoising analog quantity before AD input, and low-pass filtering is added, so that the interference of various noises loaded on voltage and current signals on signal detection can be effectively reduced.
During specific implementation, the signal isolation circuit is connected among the voltage signal sampling circuit, the current signal sampling circuit and the mainboard CPU, so that strong current signals and weak current signals are isolated.
In specific implementation, the main board CPU samples a voltage signal (e.g., ch8 in AD of fig. 5) and a current signal (e.g., ch7 in AD of fig. 5) from the signal isolation circuit, performs analog-to-digital conversion, and then performs integration to obtain electric energy.
During metering detection, the electric energy value is calculated according to the collected voltage signal from the standard voltage source and the current signal from the standard current source, the pulse number is calculated according to the electric energy value and the pulse constant, and the pulse number is sent to the pulse output circuit and is output through the pulse output interface.
Specifically, during metrological verification, the metering device is connected with metrological verification equipment through a special verification connecting device, and comprises: the voltage acquisition port is connected with a standard voltage source of the metrological verification equipment, the current loop is connected with a standard current source of the metrological verification equipment, and the pulse output port is connected with a pulse input port of a standard electric energy meter of the metrological verification equipment.
It should be understood that the pulse constant refers to the number of pulses emitted by one degree of electricity; the corresponding number of pulses can be calculated according to the actual electric energy.
The mainboard CPU is also used for sending the voltage value, the current value, the electric energy value and the pulse number to the data management module for storage. The mainboard CPU is also used for sending the charging electric energy and the accumulated charging electric energy to the data management module for storage.
Specifically, the metering device is respectively connected with the non-vehicle-mounted charger body and the electric automobile through a multi-core cable; after the voltage signal and the current signal are respectively obtained, the voltage signal and the current signal are transmitted to a main board CPU through a signal isolation circuit, and the voltage, the current and the electric energy are obtained through calculation; and the data management module is communicated with the non-vehicle-mounted charger to send the electric energy data to the charge settlement module, so that the charging electric energy metering is realized.
Specifically, the power management module is divided into two parts, namely an analog circuit power supply (+ -12V) and a digital circuit power supply (5V). As shown in fig. 4, in order to prevent the digital circuit and the analog circuit from interfering with each other, the digital and analog modules are operated in a relatively stable power environment by adopting a ground isolation manner such as single-point grounding (connected to an equipotential ground).
The power management module adopts a mode of ground wire isolation such as single-point grounding and the like to enable the digital and analog modules to work in a relatively stable power environment respectively, and mutual interference between circuits can be effectively prevented.
When the traditional non-vehicle-mounted charger is maintained and periodically checked, due to the problems that the quantity is large, the difficulty in maintenance is caused by the difficulty in disassembly, the checking period is long, the resource waste is large, and the like, the metering device originally arranged in the non-vehicle-mounted charger is integrated outside the non-vehicle-mounted charger body, and the maintenance and the metering checking work of the non-vehicle-mounted charger can be completed only by disassembling the external plug-in metering device during the maintenance and the periodic checking.
The external plug-in type integrated metering device adopts a standardized structural design. Specifically, the metering unit adopts a standardized structural design that integrates a conventional electric energy meter and a shunt into a whole.
The external plug-in integrated metering device has the advantage of convenient disassembly, and can be used for batch verification of the metering units. This external plug-in integration metering device adopts the integration technique of setting up high accuracy voltage current sampling point at the rifle end of charging gun/rifle head, satisfies the requirement at the trade point measurement.
The power module of the external plug-in integrated metering device is powered by a low-voltage auxiliary power supply arranged on the off-board charger body. The external plug-in integrated metering device is provided with an independent pulse output port, and can facilitate the metering verification equipment to collect pulse signals.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The invention has been described above by reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a// the [ device, component, etc ]" are to be interpreted openly as at least one instance of a device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

Claims (7)

1. The utility model provides an off-board machine that charges is with external plug-in integration metering device, includes:
a charging terminal module connected to the vehicle;
the power taking end module is connected with the non-vehicle-mounted charger body, wherein the non-vehicle-mounted charger body is used for providing a direct-current power supply;
a multi-core cable;
a metering unit;
the charging end module, the power taking end module, the multi-core cable and the metering unit are arranged outside the off-board charger body;
one end of the multi-core cable is connected with the charging end module;
the other end of the multi-core cable is connected with the metering unit;
the metering unit is also connected with the power taking end module;
the charging end module is a quick-change aerial plug matched with the multi-core cable;
the electricity taking end module comprises a quick-change aerial plug matched with the off-board charger body and a quick-change aerial plug matched with the multi-core cable;
the metering unit is used for metering the electric energy charged to the vehicle through the multi-core cable;
the multi-core cable comprises a direct current charging positive bus and a direct current charging negative bus;
the multi-core cable further comprises a direct-current voltage sampling line, and the direct-current voltage sampling line is respectively connected with the direct-current charging positive bus and the direct-current charging negative bus close to the charging end module;
the metering unit comprises a voltage sampling module used for acquiring a voltage signal from the direct-current voltage sampling line and determining the current charging voltage value.
2. The apparatus of claim 1, wherein the first and second electrodes are disposed on opposite sides of the housing,
the metering unit further comprises a housing;
the metering unit also comprises a zero-flux transformer, a built-in direct-current charging positive bus and a built-in direct-current charging negative bus which are arranged in the inner cavity of the shell;
the zero magnetic flux mutual inductor is sleeved on the built-in direct current charging positive bus or the built-in direct current charging negative bus;
the metering unit further comprises a current sampling module which is used for acquiring a current signal from the zero-flux transformer and determining the current charging current value.
3. The apparatus of claim 2, wherein the first and second electrodes are disposed in a common plane,
the metering unit further comprises an electric energy metering module which is used for determining the current charging power and/or the current charging electric energy according to the obtained charging current value and charging voltage value;
the power taking end module is connected with a built-in communication cable;
the metering unit further comprises a communication module which is used for sending the charging current value, the charging voltage value, the charging power and/or the charging electric energy to a charge settlement module arranged in the off-board charger body through the built-in communication cable.
4. The apparatus of claim 3, wherein the first and second electrodes are disposed in a common plane,
the metering unit further comprises a pulse output interface, wherein the pulse output interface extends out of the shell and is used for connecting metrological verification equipment;
the metering unit also comprises a pulse output module which is used for calculating the pulse number according to the acquired charging electric energy and outputting a pulse signal corresponding to the pulse number through the pulse output interface;
the metering verification equipment determines actual charging electric energy corresponding to the pulse signal according to the pulse signal received through the pulse output interface;
and the metering verification equipment is also used for judging whether the integrated metering device is qualified in verification or not according to the charging electric energy acquired from the metering unit and the actual charging electric energy.
5. The apparatus of claim 4, wherein the first and second electrodes are disposed on opposite sides of the substrate,
the multi-core cable also comprises a low-voltage auxiliary power supply positive bus and a low-voltage auxiliary power supply negative bus;
the low-voltage auxiliary power supply positive bus and the low-voltage auxiliary power supply negative bus are connected with the charging end module;
the low-voltage auxiliary power supply positive bus and the low-voltage auxiliary power supply negative bus are also connected with the power taking end module;
the metering unit further comprises a power management module, and the power management module converts electric energy obtained from the positive bus of the low-voltage auxiliary power supply and the negative bus of the low-voltage auxiliary power supply into weak direct current and weak alternating current respectively to supply power to the metering unit.
6. The apparatus of claim 5, wherein the first and second electrodes are disposed in a common plane,
the metering unit further comprises a storage unit;
the storage unit is used for storing a charging current value, a charging voltage value, charging power and/or charging electric energy;
the storage unit is also used for storing the charging electric energy for metrological verification, the actual charging electric energy, the pulse constant and a metrological verification conclusion.
7. The apparatus of claim 5, wherein the first and second electrodes are disposed in a common plane,
and a plurality of lead sealing points are arranged outside the shell.
CN202110015807.2A 2021-01-07 2021-01-07 External plug-in integrated metering device for non-vehicle charger Active CN112327050B (en)

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CN204597152U (en) * 2015-06-03 2015-08-26 重庆凯瑞电动汽车系统有限公司 A kind of charging electric vehicle rifle with electric quantity display function
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CN108859820A (en) * 2018-06-19 2018-11-23 唐山市启明科技有限公司 Energy storage type charging equipment
CN111257763B (en) * 2018-11-30 2022-04-22 凹凸电子（武汉）有限公司 Method and system for calculating remaining capacity of battery
CN110497814A (en) * 2019-09-10 2019-11-26 周封 The formula Intelligent Composite charge and discharge stake of registering one's residence adjusted based on electricity price
CN110780260A (en) * 2019-10-18 2020-02-11 中国电力科学研究院有限公司 System and method for checking electric energy error of direct current charger
CN111775731A (en) * 2020-07-08 2020-10-16 东莞市科旺科技股份有限公司 Electric automobile and energy storage replacement electric system based on modularization battery

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