CN112092654A - Portable charging device for new energy automobile only comprising alternating current charging interface - Google Patents
Portable charging device for new energy automobile only comprising alternating current charging interface Download PDFInfo
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- CN112092654A CN112092654A CN202011023975.8A CN202011023975A CN112092654A CN 112092654 A CN112092654 A CN 112092654A CN 202011023975 A CN202011023975 A CN 202011023975A CN 112092654 A CN112092654 A CN 112092654A
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- 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
- B60L53/20—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 converters located in the vehicle
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a portable charging device to new energy automobile who only contains the interchange interface that charges, belongs to and fills electric pile technical field, including the casing, set up DC link module and interchange link module in the casing, the power frequency contravariant module of being connected with DC link module, the AC control module of being connected with interchange link module, the AC output module and the supporting control module that charges that are connected with power frequency contravariant module and AC control module output. Through improving device itself, realize direct current, exchange dual input function, the convenient new energy automobile who only contains the exchange interface that charges chooses to fill electric pile wantonly and charges to this device finished product is small and exquisite, convenient vehicle-mounted carries.
Description
Technical Field
The invention belongs to the technical field of charging piles, and particularly relates to a portable charging device for a new energy automobile only comprising an alternating current charging interface.
Background
At present, direct current charging piles in charging stations and service areas begin to be popularized in a large area, more and more household charging piles also support the installation of the direct current charging piles, and alternating current charging piles are rarely arranged in the charging stations and the service areas; meanwhile, compared with an alternating-current charging pile, the direct-current charging pile has the obvious advantage of quick charging, so that the popularization and construction speed of the direct-current pile is much higher than that of the alternating-current charging pile, and simultaneously, the country accelerates the promotion of miniaturization of the direct-current pile, replaces the alternating-current charging pile, gradually transfers a vehicle-mounted charger to the position under a vehicle, and simplifies a charging system of the electric vehicle; therefore, in the foreseeable future, the direct current charging mode will be dominant, and the public resources and living space occupied by the alternating current charging pile will be further occupied. However, for some small-sized new energy automobiles and automobiles with hybrid plug-in power supply, the charging interfaces only comprise alternating-current charging interfaces, the new energy automobiles can only be charged on an alternating-current charging pile, the charging difficulty problem of the new energy automobiles is gradually highlighted, the automobiles are difficult to eliminate in a short period in the future, and the charging problem is more severe; secondly, for some other types of electric vehicles which are charged in a non-national standard, such as a scooter, a caravan, a CP-free electric vehicle and the like, the electric vehicles can be charged only through alternating current, and cannot be charged directly through a national standard alternating current charging pile or a national standard direct current charging pile, so that the charging problem of the electric vehicles is more remarkable; therefore, it is very practical to design a portable charging device for charging an electric vehicle having only an ac interface.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a portable charging device for a new energy automobile only comprising an alternating current charging interface, the device is improved to realize the direct current and alternating current double-input function, the new energy automobile only comprising the alternating current charging interface can conveniently select any charging pile to charge, and the device is small in finished product and convenient to carry along with the automobile.
The technical scheme adopted by the invention is as follows: a portable charging device for a new energy automobile only comprising an alternating current charging interface comprises a shell, a direct current connecting module and an alternating current connecting module which are arranged in the shell, a power frequency inversion module connected with the direct current connecting module, an alternating current control module connected with the alternating current connecting module, an alternating current output module connected with the output ends of the power frequency inversion module and the alternating current control module and a matched charging control module, the charging control module comprises a system CPU module, a direct current interaction module and a direct current detection module which are connected between the system CPU module and the direct current connection module, an alternating current interaction module connected between the system CPU module and the alternating current connection module, an output interaction module and an output detection module connected between the system CPU module and the alternating current output module, an inversion control module connected between the power frequency inversion module and the system CPU module, and an output mode selection module connected with the system CPU module.
The direct current interaction module receives and analyzes CAN signals of the direct current charging gun, converts the CAN signals into CAN signals according to the required voltage and current signals sent by the CPU module of the receiving system and sends the CAN signals to the direct current charging gun, so that the output voltage, current and power of the direct current charging gun are adjusted;
the alternating current interaction module identifies the level state and duty ratio information of a CP signal in the alternating current charging gun, a resistor is configured between a CP line and a PE line, and an in-vehicle S2 switch is simulated through a built-in controllable switch to realize the control of starting and stopping the charging of the alternating current charging gun;
the output interactive module receives and analyzes the duty ratio signal sent by the system CPU module to adjust the duty ratio of the output CP signal, so as to adjust the alternating current output power.
Further, the direct current connection module comprises a direct current charging gun interface, a temperature detection element and a direct current output connection line which are arranged on the direct current charging gun interface, and a matched direct current connection processing unit; the direct current connection processing unit is in data interaction with the direct current interaction module, the direct current output connecting line is connected with the power frequency inversion module, and the direct current detection module is connected with the direct current output connecting line.
Furthermore, the alternating current connection module comprises an alternating current charging gun interface, an electronic lock, a temperature detection element, an alternating current output connection line and a matched alternating current connection processing unit, wherein the electronic lock, the temperature detection element and the alternating current output connection line are arranged on the alternating current charging gun interface; the alternating current connection processing unit is connected with the alternating current interaction module, and the alternating current output connecting line is connected with the alternating current control module.
Furthermore, the alternating current control module comprises an alternating current contactor connected with the alternating current output connecting line, a relay for controlling the alternating current contactor and a matched control and state detection circuit, and the control and state detection circuit is connected with the system CPU module.
Furthermore, the alternating current output module comprises a charging socket and an alternating current charging gun which are connected with the alternating current input line by means of an output selector switch, a limit switch arranged in the charging socket and a matched output interface control unit; the output interface control unit is connected with the output interaction module, the alternating current input line is connected with the output ends of the power frequency inversion module and the alternating current control module, and the output detection module is connected with the alternating current input line.
The invention has the following beneficial effects: according to the invention, the device is improved, so that the direct-current and alternating-current dual-input functions are realized, and a new energy automobile only comprising an alternating-current charging interface can conveniently select any charging pile to be charged; the finished product of the device is small and exquisite and is convenient to carry on a vehicle; when charging, a user only needs to carry the device, and the direct-current or alternating-current charging pile can be used for directly charging the national-standard or non-national-standard new energy automobile only with the alternating-current charging interface, so that the time for searching for the suitable charging pile by the user is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of the structure and connection of a DC link module;
FIG. 3 is a schematic diagram of the structure and connection of the AC connection module
FIG. 4 is a schematic diagram of the structure of an AC control module;
fig. 5 is a schematic diagram of the structural composition and connection of the ac output module.
Detailed Description
Referring to the attached fig. 1-5, a portable charging device for a new energy automobile only containing an ac charging interface comprises a housing, a dc connection module and an ac connection module arranged in the housing, a power frequency inversion module connected with the dc connection module, an ac control module connected with the ac connection module, an ac output module connected with the output ends of the power frequency inversion module and the ac control module, and a charging control module, the charging control module comprises a system CPU module, a direct current interaction module and a direct current detection module which are connected between the system CPU module and the direct current connection module, an alternating current interaction module connected between the system CPU module and the alternating current connection module, an output interaction module and an output detection module connected between the system CPU module and the alternating current output module, an inversion control module connected between the power frequency inversion module and the system CPU module, and an output mode selection module connected with the system CPU module. The charging control module is a gray part in fig. 1.
Referring to fig. 2, the dc connection module includes a dc charging gun interface, a temperature detection element and a dc output connection line disposed on the dc charging gun interface, and a matching dc connection processing unit; the direct current connection processing unit is in data interaction with the direct current interaction module, the direct current output connecting line is connected with the power frequency inversion module, and the direct current detection module is connected with the direct current output connecting line.
The power frequency inversion module inverts the direct current input by the direct current charging pile into power frequency alternating current to be output and provides the power frequency alternating current for charging the new energy automobile; the power frequency inversion module adopts a bridge type inversion structure, 4 power switch tubes are adopted for switching, each power switch tube receives analog voltage of a switch tube driver in the inversion control unit for control, and the frequency of switching of the analog control signal and the switch tubes is power frequency 50 Hz.
The direct current interaction module receives and analyzes CAN data of the direct current charging gun, responds to corresponding data frames and simulates the charging interaction function of the BMS and the direct current charging pile; the direct current interaction module receives the required voltage and current signals sent by the CPU module of the system, converts the signals into CAN data and sends the CAN data to the external direct current charging gun, so as to achieve the purpose of adjusting the output voltage, current and power of the external direct current charging gun; in addition, the direct current interaction module is also responsible for detecting information such as the connection state, the temperature and the like of the direct current charging connection device and comprehensively controlling the charging process; and the CAN data protocol of the interaction between the direct current interaction module and the direct current charging gun conforms to the national standard requirement.
The alternating current interaction module identifies the level state and duty ratio information of a CP signal in the alternating current charging gun, a resistor which meets the national standard is configured between the CP and the PE, and an in-vehicle S2 switch is simulated through a built-in controllable switch, so that the control of starting and stopping the charging of the external alternating current charging gun is realized; the controllable switch is a mos tube or a triode and is directly controlled by a system CPU module; in addition, the alternating current interaction module is communicated with the alternating current connection processing unit, so that the monitoring of the temperature and the connection state of the charging socket and the monitoring of the control and locking state of the electronic lock are realized; the electronic lock is locked before charging is started, the electronic lock is unlocked after charging is completed, and charging is stopped immediately when the electronic lock is abnormally unlocked in the charging process.
The output interaction module is used as a unit for interacting with the AC charging interface of the new energy automobile, and plays a role in judging whether the charging type of the output interface is national standard or non-national standard, controlling the output of the corresponding charging interface and interacting with the AC charging interface of the new energy automobile in the system; the output interactive module receives an output duty ratio signal sent by the system CPU module, and the duty ratio of the output CP signal can be adjusted in real time through the output duty ratio signal sent by the system CPU module, so that the maximum charging current of an external electric automobile is achieved, and the adjustment of alternating current output power is realized; the CP signal is in a direct current or PWM form, and the duty ratio of the CP signal represents the maximum output power of alternating current; in addition, the output interaction module is also communicated with an output interface control unit in the alternating current output module to acquire the connection state of the output charging socket, indirectly control the switching of the output switching switch and be responsible for interacting with an alternating current charging port of the new energy automobile during national standard alternating current charging. In addition, when the interface of the non-national standard alternating current charging gun is connected with a new energy automobile for charging, the CP control part of the module does not work.
The direct current detection module comprises direct current input voltage monitoring, direct current input current monitoring and power monitoring; the input line of the module is a voltage acquisition signal and a current acquisition signal, the voltage acquisition signal is acquired in a resistance voltage division mode, the current acquisition signal is acquired by a shunt which is connected in series into a bus negative line, and the module is connected with a system CPU module through a communication line and reports acquired data to the system CPU module in real time.
The output detection module comprises alternating current output voltage monitoring, live wire current monitoring, zero line current monitoring and power monitoring; the input line of the module is a voltage signal and a current acquisition signal, the voltage signal is directly accessed from the output L line and the output N line, and the current acquisition signal is acquired by a current transformer sleeved in the output L line and the output N line respectively; the module is connected with the system CPU module through a communication line and reports the acquired data to the system CPU module in real time.
And the output mode selection module is used as a parameter setting unit and can be used for manually setting the maximum output power of the charging device, selecting the type of an input interface (alternating current, direct current and automatic) and selecting an alternating current output mode (national standard, non-national standard and automatic).
The direct current charging gun interface meets the national standard requirements, the connecting line comprises a direct current output, a PE line, a CC line and H and L lines of CAN communication, wherein a direct current output line is connected with the input end of the power frequency inversion module, and voltage and current acquisition signals are input to the direct current detection module through a voltage division acquisition circuit and a current divider so as to realize the detection of input voltage, current and power; the direct current connection processing unit identifies whether the direct current charging gun is connected or not by detecting the change of the resistance value between the CC and the PE, and the direct current connection processing unit realizes the detection of the temperature of the charging socket through a temperature detection element; in addition, a CAN communication line of the direct current charging gun interface is directly connected with the direct current interaction module, and the direct current connection processing unit is connected with the direct current interaction module through a communication line.
Referring to fig. 3, the ac connection module includes an ac charging gun interface, an electronic lock, a temperature detection element, an ac output connection line, and a matching ac connection processing unit; the alternating current connection processing unit is connected with the alternating current interaction module, and the alternating current output connecting line is connected with the alternating current control module.
The AC charging gun interface is matched with an AC charging gun in accordance with the national standard for use, and the AC output connecting line comprises AC power lines L and N, CC, a CP line, an electronic lock control and feedback line, a temperature acquisition line and a PE line; the alternating current connection processing unit identifies whether the alternating current charging gun is connected or not by detecting the change of the resistance value between the CC and the PE, and detects the interface temperature of the alternating current charging gun through a temperature detection element and a temperature acquisition line; in addition, the alternating current connection processing unit also directly controls an electronic lock arranged on an alternating current charging gun interface and detects the locking state of the electronic lock, and the electronic lock is used for locking the alternating current charging gun on a charging socket in the charging process to prevent the alternating current charging gun from being pulled out mistakenly; the alternating current connection processing unit is connected with the alternating current interaction module through a communication line; the CP line on the interface of the AC charging gun is directly connected with the AC interaction module, and the signal on the CP line is a direct current or PWM signal.
Referring to fig. 4, the ac control module includes an ac contactor connected to the ac output connection line, a relay for controlling the ac contactor, and a control and status detection circuit connected to the system CPU module.
Control and state detection circuit realize the control of relay and the control of contactor, and the relay realizes the direct control to the contactor, and whether contactor control alternating current exports the alternating current output interface for charging control when external connection alternating current fills electric pile, the inside alternating current output short circuit problem of system when can preventing outside simultaneous connection direct current rifle and the alternating current rifle that charges simultaneously.
Referring to fig. 5, the ac output module includes a charging socket and an ac charging gun connected to an ac input line by an output switch, a limit switch disposed in the charging socket, and a matching output interface control unit; the output interface control unit is connected with the output interaction module, the alternating current input line is connected with the output ends of the power frequency inversion module and the alternating current control module, and the output detection module is connected with the alternating current input line.
The output change-over switch is in a double-pole double-throw mode and can be controlled to be switched to a charging socket or an alternating current charging gun through an output interface control circuit; the output interface control unit can also detect the state of a limit switch in the charging socket to detect the connection state of the socket; the charging socket and the alternating current charging gun both comprise an output L, N and a PE wire, and the alternating current charging gun is a standard national standard alternating current charging gun, wherein a CP wire of the charging gun is directly connected with the output interaction module and is directly charged and interacted with the electric automobile; in addition, the output interaction module is connected with the output interface control unit through a communication line, and the output interface control unit receives the control of the output interaction module and feeds back the connection state of the charging socket or the alternating current charging gun.
In specific implementation, the portable charging device can support a new energy automobile only comprising a national standard or non-national standard alternating current charging interface to charge on a national standard alternating current charging pile or a direct current charging pile; the charging device can realize the charging from the direct current charging pile to the national standard alternating current charging interface, the charging from the direct current charging pile to the non-national standard alternating current charging interface and the charging from the alternating current charging pile to the non-national standard alternating current charging interface, and the charging problem of the new energy automobile with different types of alternating current charging interfaces can be solved by combining the charging modes. Meanwhile, the invention has the following functional characteristics:
automatic power regulation
The maximum input current of the existing new energy electric vehicle alternating current charging interface is generally divided into 32A, 16A, 10A and the like, aiming at the different current types, the maximum input current is limited by an internal electrical structure and a fixed mode of CP duty ratio, and a common alternating current charging pile can only support charging in a certain current interval generally, so that full coverage and automatic adjustment of charging power cannot be realized; the duty ratio signal sent to the output interaction module by the CPU module of the adjusting system can realize the function of adjusting the duty ratio of the CP signal of the output interaction module in real time, thereby realizing the maximum alternating current charging current of an external electric automobile and achieving the purpose of changing the alternating current output power; in addition, the CPU module of the system monitors the change of the alternating current output power in real time through the output detection module, and then timely adjusts the required voltage and current of the direct current interaction module according to the change of the alternating current output power to achieve the purpose of changing the output voltage and current of the external direct current charging gun and achieve the adjustment of the input power, thereby achieving the automatic matching and automatic adjustment of the input power and the output power.
Input mode adaptation
The charging device has the self-adaptive function of the input mode on the premise that the input mode is not forcibly set to a fixed input mode through the charging mode setting unit; the direct current connection module and the alternating current connection module of the input part both comprise a connection detection device (CC line and connection processing unit) for detecting the connection of an externally input charging gun; when the direct current connecting device detects that the charging gun is connected, the direct current interaction module receives connection information and reports the connection information to the system CPU module, the system CPU module controls the inversion control module, the direct current interaction module, the input detection module and the output detection module to be in a preparation working state, and meanwhile, the alternating current control module is in a disconnected state under the condition that the external direct current charging gun is not pulled out, so that the risk of alternating current output short circuit caused by the fact that the alternating current charging gun is inserted mistakenly at the same time is prevented; when the direct current interaction module detects a charging start signal and finishes interaction, the external direct current charging pile outputs direct current voltage and transmits the direct current voltage to the input end of the power frequency inversion module, and the system CPU module controls the inversion control module to start the inverter in time to realize alternating current output; when only an AC charging gun is connected to the outside, the AC connection device detects the connection of the charging gun, the AC interaction module receives the connection information and reports the connection information to the system CPU module, the system CPU module controls the AC control module, the AC interaction module and the output detection module to be in a preparation working state, meanwhile, the power frequency inversion module and the inversion control module related to the direct current charging conversion are ensured to be in a non-working state, the single output of the system is ensured, when the alternating current interaction module detects a PWM signal for starting charging, the alternating current interaction module closes a control switch of S2 in the simulated automobile in time, the external alternating current charging pile starts to output alternating current, and after the interaction between the output interface and the external electric automobile charging interface is completed, the system CPU module controls the AC control module to close the contactor, so that the input AC interface and the output interface of the AC control module are ensured to be conducted, and the output of the AC interface is realized.
Output mode adaptation
The output mode comprises national standard alternating current output and non-national standard alternating current output, and the common alternating current charging pile are not compatible with each other; on the premise that a certain fixed output mode is not forcibly set by the output mode selection module, the charging device has the self-adaptive function of the output mode; when a charging gun of an alternating current output module is connected, after charging conversion of a system is started, firstly, a system CPU module controls a CP interface of an output interaction module to output a charging start signal, after a break time is continued, if the charging start signal is responded (an S2 switch in a vehicle is detected to be closed, PWM is changed into +/-6V), the charging is judged to be in a national standard mode, then, the charging enters the national standard mode, the system CPU module immediately controls an alternating current control module to close an alternating current contactor, then, an output switch in the alternating current output module is switched to one side of a charging gun interface, then, the output interaction module controls a CP signal to carry out charging interaction, output power is adjusted in real time by detecting alternating current output current and adjusting the duty ratio of the CP signal in the charging process, and charging stop signal is detected in real time, and alternating current output is stopped; if the charging start signal of the CP is not responded continuously (the CP is not responded continuously for 20 s) in the starting stage, the charging is judged to be non-national standard charging, the interaction of the CP information of the output interface is stopped, then the alternating current control module directly closes the alternating current contactor, and the output change-over switch in the alternating current output module is switched to one side of the charging gun interface to start charging; in addition, after the charging socket of the alternating current output module is connected (the state of the limit switch is changed), and after the charging is started, the output interaction module does not perform CP signal interaction and directly determines a non-national standard charging mode, the alternating current control module directly closes the contactor, and the output change-over switch in the alternating current output module is switched to one side of the charging socket interface to start charging. In the non-national standard alternating current charging process, the system timely disconnects the alternating current output and stops charging after detecting that the alternating current output current is continuously smaller than a certain set value.
Safety of non-national standard AC charging mode
Due to the defects of the non-national standard charging mode, the CP signal interaction is avoided, the AC output cannot stop when the charging gun or the charging plug is disconnected, and the safety problem exists; when the charging gun is connected for charging, the charging device can monitor the sudden drop of the charging current to zero in real time, and immediately disconnect the alternating current output when the sudden drop of the current to zero caused by the disconnection of the charging gun is judged; when the charging socket is connected for charging, the system can monitor the state of the limit switch in the charging socket in real time, and when the connection disconnection of the charging socket is detected (the state of the limit switch is changed), the alternating current output is immediately disconnected, so that the charging safety is ensured. In addition, when the system is charged in any mode, the difference value of the current of the output live wire and the current of the zero line is monitored in real time, when the difference value is larger than a certain set value (30 mA), the fact that the output end has electric leakage is judged, the alternating current output is cut off in time, and the charging safety is guaranteed.
The device is small in size and convenient for a user to carry on the vehicle. When charging is needed, according to the type of current of the charging pile, a charging gun of the charging pile selects to be connected with a direct current connection module or an alternating current connection module of the device; the alternating current charging interface of the new energy automobile is connected with the socket or the charging gun of the device. The charging mode is divided into a single output mode and an output self-adaptive mode; the single output mode is that the socket is only electrified, so that the charging of a new energy automobile which is not national standard and can not use a charging gun is facilitated; the output self-adaptive mode is that the charging gun is only electrified, so that the new energy automobile capable of using the charging gun is convenient to charge.
Claims (5)
1. The utility model provides a portable charging device to only containing new energy automobile of interchange interface that charges, includes the casing, sets up DC link module and interchange link module in the casing, the power frequency contravariant module of being connected with DC link module, the AC control module of being connected with interchange link module, the AC output module and supporting charging control module of being connected with power frequency contravariant module and AC control module output, its characterized in that: the charging control module comprises a system CPU module, a direct current interaction module and a direct current detection module which are connected between the system CPU module and the direct current connection module, an alternating current interaction module connected between the system CPU module and the alternating current connection module, an output interaction module and an output detection module which are connected between the system CPU module and the alternating current output module, an inversion control module connected between the power frequency inversion module and the system CPU module and an output mode selection module connected with the system CPU module;
the direct current interaction module receives and analyzes CAN signals of the direct current charging gun, converts the CAN signals into CAN signals according to the required voltage and current signals sent by the CPU module of the receiving system and sends the CAN signals to the direct current charging gun, so that the output voltage, current and power of the direct current charging gun are adjusted;
the alternating current interaction module identifies the level state and duty ratio information of a CP signal in the alternating current charging gun, a resistor is configured between a CP line and a PE line, and an in-vehicle S2 switch is simulated through a built-in controllable switch to realize the control of starting and stopping the charging of the alternating current charging gun;
the output interactive module receives and analyzes the duty ratio signal sent by the system CPU module to adjust the duty ratio of the output CP signal, so as to adjust the alternating current output power.
2. The portable charging device for the new energy automobile only containing the alternating-current charging interface of claim 1, characterized in that: the direct current connection module comprises a direct current charging gun interface, a temperature detection element and a direct current output connection line which are arranged on the direct current charging gun interface, and a matched direct current connection processing unit; the direct current connection processing unit is in data interaction with the direct current interaction module, the direct current output connecting line is connected with the power frequency inversion module, and the direct current detection module is connected with the direct current output connecting line.
3. The portable charging device for the new energy automobile only containing the alternating-current charging interface of claim 1, characterized in that: the alternating current connection module comprises an alternating current charging gun interface, an electronic lock, a temperature detection element, an alternating current output connecting wire and a matched alternating current connection processing unit, wherein the electronic lock, the temperature detection element and the alternating current output connecting wire are arranged on the alternating current charging gun interface; the alternating current connection processing unit is connected with the alternating current interaction module, and the alternating current output connecting line is connected with the alternating current control module.
4. The portable charging device for the new energy automobile only containing the alternating current charging interface of claim 3, is characterized in that: the alternating current control module comprises an alternating current contactor connected with the alternating current output connecting line, a relay for controlling the alternating current contactor and a matched control and state detection circuit, and the control and state detection circuit is connected with the system CPU module.
5. The portable charging device for the new energy automobile only containing the alternating-current charging interface of claim 1, characterized in that: the alternating current output module comprises a charging socket and an alternating current charging gun which are connected with an alternating current input line by means of an output selector switch, a limit switch arranged in the charging socket and a matched output interface control unit; the output interface control unit is connected with the output interaction module, the alternating current input line is connected with the output ends of the power frequency inversion module and the alternating current control module, and the output detection module is connected with the alternating current input line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011023975.8A CN112092654A (en) | 2020-09-25 | 2020-09-25 | Portable charging device for new energy automobile only comprising alternating current charging interface |
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| CN202011023975.8A CN112092654A (en) | 2020-09-25 | 2020-09-25 | Portable charging device for new energy automobile only comprising alternating current charging interface |
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Application publication date: 20201218 |