CN113752885B - Electric automobile that can support direct current charging national standard treasured that charges - Google Patents

Electric automobile that can support direct current charging national standard treasured that charges Download PDF

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Publication number
CN113752885B
CN113752885B CN202110759513.0A CN202110759513A CN113752885B CN 113752885 B CN113752885 B CN 113752885B CN 202110759513 A CN202110759513 A CN 202110759513A CN 113752885 B CN113752885 B CN 113752885B
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charging
direct current
power supply
electric automobile
switching unit
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CN113752885A (en
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彭建华
潘继雄
周幼华
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Shenzhen Yujiaocheng Technology Co ltd
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Shenzhen Yujiaocheng Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50Charging stations characterised by energy-storage or power-generation means
    • B60L53/53Batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50Charging stations characterised by energy-storage or power-generation means
    • B60L53/57Charging stations without connection to power networks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60Monitoring or controlling charging stations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations

Abstract

The invention relates to the technical field of electric automobile charging, discloses an electric automobile charging device capable of supporting a direct current charging national standard, solves the problems of small charging current, long charging time and long self-charging time of an on-board power battery and mismatching with a 2015 version direct current charging national standard interface existing in the existing electric automobile charging device on the market, can be used as extension and expansion of the function of an electric automobile charging pile, is compatible with the 2015 version national standard charging communication protocol, can directly utilize a direct current charging gun and a connecting cable carried along with a vehicle to conduct gun inserting and quick charging on the electric automobile, simultaneously supports gun inserting and power supplementing of the electric automobile by the outdoor direct current charging pile and the alternating current charging pile, can realize a double-charging mode of 'one gun two charging' of the electric automobile and the charging device by the outdoor direct current charging pile, thoroughly solves the defects of difficult charging, slow charging and inconvenient charging of the electric automobile in the way of running, and has higher market popularization value.

Description

Electric automobile that can support direct current charging national standard treasured that charges
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to an electric automobile charger baby capable of supporting a direct current charging national standard.
Background
Most electric vehicles now support a fast charging mode of a direct current charging pile and a slow charging mode of an alternating current charging pile, but charging places are relatively fixed, and are generally in district parking lots, office building parking lots and special charging and replacing stations, so that the embarrassing situations inevitably occur: the residual electric quantity of the electric automobile which runs in the remote area or suburban area of the country is difficult to support and run to the charging and replacing station; the residual electric quantity of the electric automobile running on the expressway is difficult to support the electric automobile to run to the next service area provided with the charging pile; because of the long charging time, charging stations often need to wait in line for charging; the cell is not set up with a charging pile for charging. Once the electric automobile enters a power failure state and cannot be timely supplemented with power, the electric automobile can be prone to the ground due to electric energy exhaustion and is forced to wait for trailer rescue service in situ, so that the use cost of a user is definitely increased, and the driving experience of the user is seriously affected.
Similar to the mobile phone, the mobile phone charger baby is generated in order to prolong the standby time, and the electric automobile charger baby is generated in the background because the continuous voyage mileage is limited, so as to solve the embarrassing problem of the last 1 km. The electric automobile treasured that charges can carry the trip along with the car, convenient to use belongs to car stand-by power supply, can regard as extension and the extension of electric automobile fills electric pile function, makes up the defect that fills electric pile and can not remove, is the difficult effective way of automobile charging in solving the driving.
At present, a plurality of domestic research institutions and scholars respectively put forward various electric architectures and schemes of the automobile charger, for example, patent CN209298938U divides the automobile charger into an automobile base and a battery energy block, the automobile base is connected to a high-voltage box and has the function of bidirectional DC/DC power conversion, and the automobile charger can convert the high-voltage electricity of the battery energy block into high-voltage electricity to charge an automobile-mounted power battery, but the charging current is only 15A; the patent CN106992585A realizes the alternating-current charging and direct-current charging of the automobile power battery by the automobile charger by adopting a bidirectional AC/DC power supply conversion module and a bidirectional DC/DC power supply conversion module, and the electricity supplementing of the automobile charger by external alternating-current commercial power; the utility model provides an automobile treasured electrical structure that charges that patent CN106208249B provided uses comparatively commonly, divide into charging module, battery pack and output subassembly, and charging module supports external alternating current commercial power to charge battery pack, and battery pack is as stand-by power supply storage energy, and output subassembly promotes battery pack voltage back to charge on-vehicle power battery. However, the charger schemes mentioned in the above patents have the common problems of small charging current, long charging time for the vehicle-mounted power battery, long self-charging time and mismatching with the direct-current charging national standard interface of the electric automobile.
Disclosure of Invention
The invention mainly aims to provide an electric automobile charger capable of supporting a direct current charging national standard, which aims to enable the electric automobile charger to be compatible with a direct current charging interface on an electric automobile, support a national standard charging communication protocol of 2015 edition, and enable the electric automobile to be charged quickly, and simultaneously enable a direct current charging pile and a direct current charging gun to charge the electric automobile quickly, so that the defects of difficult charging, slow charging and inconvenient charging of the electric automobile in the driving process are thoroughly solved, and the problem of 'mileage anxiety' caused by limited mileage is thoroughly eliminated.
In order to achieve the aim, the electric automobile charger capable of supporting the direct current charging national standard, which is provided by the invention, comprises ase:Sub>A lithium iron phosphate battery pack, ase:Sub>A Battery Management System (BMS), ase:Sub>A bidirectional DC/DC isolation conversion power supply, ase:Sub>A switch switching unit, ase:Sub>A rectifying unit, ase:Sub>A direct current charging interface seat, ase:Sub>A direct current power supply interface seat, an alternating current charging interface seat, ase:Sub>A touch screen, an AC inverter power supply, ase:Sub>A DC conversion power supply, ase:Sub>A 12Vdc direct current output interface, ase:Sub>A Type-C output interface, ase:Sub>A USB-A output interface and an AC output interface, wherein the bidirectional DC/DC isolation conversion power supply comprises ase:Sub>A direct current boost circuit and ase:Sub>A direct current buck circuit, the switch switching unit, the bidirectional DC/DC isolation conversion power supply and the lithium iron phosphate battery pack are sequentially and electrically connected in series, the direct current charging interface seat and the direct current power supply interface seat are respectively and electrically connected with the switch switching unit, the alternating current charging interface seat, the rectifying unit and the bidirectional DC/DC isolation conversion power supply are sequentially and electrically connected in series, the AC inversion power supply and the DC conversion power supply are respectively and electrically connected with the lithium iron phosphate battery pack, the 12Vdc direct current output interface, the Type-C output interface and the USB-A output interface are respectively and electrically connected with the DC conversion power supply, the AC alternating current output interface is electrically connected with the AC inversion power supply, the Battery Management System (BMS) is electrically connected with the lithium iron phosphate battery pack, the Battery Management System (BMS) is respectively and communicatively connected with the bidirectional DC/DC isolation conversion power supply and the switch switching unit through CAN buses, the Battery Management System (BMS) is used for respectively controlling the switching action between the voltage boosting and the voltage reducing of the bidirectional DC/DC isolation conversion power supply and the switching action of the switch switching unit, and the touch screen is electrically connected with the Battery Management System (BMS).
Optionally, the lithium iron phosphate battery pack comprises 16 strings of high-rate single battery cells, wherein rated capacities of the high-rate single battery cells are 100Ah, and the 16 strings of high-rate single battery cells are electrically connected in series.
Optionally, the rated voltage of the lithium iron phosphate battery pack is 51.2V, the rated capacity of the lithium iron phosphate battery pack is 100Ah, and the total electric quantity of the lithium iron phosphate battery pack is 5.12KWh.
Optionally, the total power of the bidirectional DC/DC isolation conversion power supply is 5KW, and the boost output voltage range is 200 Vdc-750 Vdc.
Optionally, the output power of the 12Vdc direct current output interface is 13.6Vdc/10A.
Optionally, the output power of the AC output interface is 500W.
The technical scheme of the invention has the following beneficial effects:
1. the direct-current charging interface on the electric automobile compatible with the electric automobile provided by the invention supports 2015 edition national standard charging communication protocol, can directly utilize the direct-current charging gun and the connecting cable to conduct gun inserting quick charging on the electric automobile, and also supports the outdoor direct-current charging pile and the alternating-current charging pile to conduct gun inserting power supplementing on the electric automobile;
2. the electric automobile charger baby supports a double-charging mode of 'one gun and two charging' of the electric automobile and the charger baby by the outdoor direct-current charging pile, the electric automobile is charged preferentially, and the charger baby is charged after the electric automobile is fully charged, so that two pieces of equipment can be fully charged at one time;
3. the electric automobile charger provided by the invention provides a 12Vdc direct current output interface function, and can provide emergency ignition service by utilizing an automobile lapping wire carried on a vehicle;
4. the electric automobile charger provided by the invention provides ase:Sub>A 220Vac alternating current output interface function, ase:Sub>A Type-C output interface function and ase:Sub>A USB-A output interface function, and supports charging and power supply services for 3C digital equipment, portable audio and video equipment, electric tools and medium and small power alternating current electric equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of an external connection of an electric vehicle charger capable of supporting a dc charging national standard according to the present invention;
fig. 2 is an internal electrical architecture and an external connection diagram of an electric vehicle charger capable of supporting the dc charging national standard according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides an electric automobile charger capable of supporting a direct current charging national standard.
As shown in fig. 1 and 2, in an embodiment of the present invention, the battery charger for an electric vehicle capable of supporting ase:Sub>A DC charging national standard includes ase:Sub>A lithium iron phosphate battery pack, ase:Sub>A Battery Management System (BMS), ase:Sub>A bidirectional DC/DC isolation conversion power supply, ase:Sub>A switching unit, ase:Sub>A rectifying unit, ase:Sub>A DC charging interface holder, ase:Sub>A DC power supply interface holder, an AC charging interface holder, ase:Sub>A touch screen, an AC inverter power supply, ase:Sub>A DC conversion power supply, ase:Sub>A 12Vdc DC output interface, ase:Sub>A Type-C output interface, ase:Sub>A USB-ase:Sub>A output interface, and an AC output interface, the bidirectional DC/DC isolation conversion power supply includes ase:Sub>A DC boost circuit and ase:Sub>A DC buck circuit, the switching unit, the bidirectional DC/DC isolation conversion power supply, and the lithium iron phosphate battery pack are sequentially connected in series and electrically, the DC charging interface holder, the switching unit, and the bidirectional DC/DC isolation conversion power supply are sequentially connected in series and electrically, the AC power supply, the DC conversion power supply, the 12Vdc DC output interface, the Type-DC output interface, and the AC conversion power supply are respectively connected with the lithium iron phosphate battery pack, the 12 DC output interface, the Type DC output interface, the DC conversion power supply, and the AC conversion power supply are respectively connected with the DC power supply, the DC conversion power supply and the DC conversion power supply are respectively connected with the DC bus, the Battery Management System (BMS) is used for respectively controlling the switching action between the voltage boosting and the voltage reducing of the bidirectional DC/DC isolation conversion power supply and the switching action of the switch switching unit, and the touch screen is electrically connected with the Battery Management System (BMS).
Specifically, the lithium iron phosphate battery pack is a precious energy storage power supply for storing electric energy input by an external power supply, and is used for charging an electric automobile after direct current conversion, and the lithium iron phosphate battery has the advantages of good temperature characteristics, long cycle life and high safety performance, is suitable for being used as a precious energy storage power supply for charging, and takes weight and electric quantity into consideration, 16 strings of high-rate single battery cores with rated capacity of 100Ah are selected for series connection and grouping to form a standby power supply with voltage/capacity specification of 51.2V/100Ah, the total electric quantity is 5.12KWh, and the endurance mileage can be increased by about 40 km.
Specifically, the bidirectional DC/DC isolation conversion power supply belongs to a core electric component in a charging treasured charging and discharging main loop, is designed to have total power of 5KW, and consists of a direct-current booster circuit and a direct-current step-down circuit, wherein the direct-current booster circuit is used for lifting a charging treasured energy storage power supply voltage platform to an electric vehicle power battery working voltage platform, and meets the requirements of most electric vehicle working voltage ranges: 200 Vdc-750 Vdc; the direct current voltage reduction circuit is used for converting high-voltage power output by the outdoor direct current charging pile and the alternating current charging pile into a working voltage platform of the charger baby energy storage power supply, so that the charger baby can be charged quickly, and the highest charging current can reach 100A.
Specifically, a Battery Management System (BMS) is a control core of a charger, and has the main roles of protecting the working process of a lithium iron phosphate battery from damaging faults such as overcharge, overdischarge, over-temperature, overcurrent and short circuit, and the like, meanwhile, the BMS is also responsible for the task of interactive communication with an electric automobile and an outdoor direct current charging pile, the BMS charging communication protocol is fully compatible with the regulations in a communication protocol between a non-vehicle-mounted conductive charger of the GB/T27930-2015 electric automobile and the battery management system, the direct current quick charging of the charger to the electric automobile is realized seamlessly, the outdoor direct current charging pile is used for quickly supplementing electricity to the charger, in addition, the BMS, a bidirectional DC/DC isolation conversion power supply and a switch switching unit respectively establish CAN bus communication, and the charging work flow and the discharging work flow of the charger are executed by controlling the switching actions between the boost and the buck of the bidirectional DC/DC isolation conversion power supply; the outdoor direct-current charging pile is used for simultaneously charging the charger and the electric automobile by controlling the switch switching unit, and is used for preferentially charging the electric automobile, and the charger is switched to charge after the electric automobile is fully charged.
Specifically, the direct current charging interface seat and the direct current power supply interface seat provide charging control guide signals CC1 and CC2 and detection functions thereof, and meet the requirements of the conduction charging national standard GB/T18487.1-2015 electric automobile conduction charging system-part 1: general requirements and GB/T20234.3-2015 connection device for conductive charging of electric automobile-part 3: the specification in the direct current charging interface belongs to a physical medium supporting direct current protocol charging.
Specifically, the ac charging interface seat provides charging control guide signals CC and CP and detection functions thereof, and meets the national standard of conductive charging, GB/T18487.1-2015, conductive charging system for electric automobile—part 1: general requirements and GB/T20234.2-2015 connection device for conductive charging of electric automobile-part 2: the specification in the AC charging interface belongs to the physical medium supporting AC protocol charging. The charger baby supports outdoor alternating-current charging pile gun charging, alternating-current commercial power enters the rectifying unit after passing through the alternating-current charging interface seat, the rectifying unit converts 220Vac alternating-current commercial power into 311Vdc direct-current high-voltage power and is connected to the input end of the bidirectional DC/DC isolation conversion power supply, and the charger baby energy storage battery is charged after buck conversion.
Specifically, the AC output interface is used for 220Vac AC output, the charger energy storage battery can provide 220Vac AC for the outside after being inverted by an AC inversion power supply, the design power is 500W, and the charger energy storage battery can be connected with AC loads such as a notebook computer, an electric tool and the like.
Specifically, the 12Vdc direct current output interface, the Type-C output interface and the USB-A output interface are externally added direct current output ports of the charger baby, and are obtained by performing voltage reduction conversion on the energy of the energy storage battery of the charger baby by ase:Sub>A DC conversion power supply. The 12Vdc direct current output interface provides 13.6Vdc/10A output power, and can charge an automobile storage battery through an automobile ignition wire to provide emergency ignition service; the Type-C output interface supports USB-PD fast charging protocols, the output voltage is self-adaptive to 5Vdc/9Vdc/12Vdc/15Vdc/20Vdc, the maximum current/power is designed to be 3A/60W, and the Type-C output interface is compatible with various fast charging protocols such as APPLE2.4A, DCP1.5A, QC3.0/4-12V, QC2.0/9V/12V, samsungAFC9V, huaweiFCP V and the like; the USB-A output interface provides 5Vdc/2.4A output power, and can provide charging service for mobile phones, small audio and video entertainment equipment, portable electronic toys and the like.
Specifically, the touch screen is ase:Sub>A human-computer interface of the charger baby, and is used for displaying parameters such as alternating current, direct current input, output voltage, current, power and the like, displaying working states of all component devices in the charger baby and datase:Sub>A such as charging and discharging current, SOC (state of charge) of the energy storage battery, and the like.
The electric automobile charger baby provided by the invention can be carried along with a vehicle for traveling, is safe and reliable, is convenient to use, and has the following working process and operation steps:
(1) If the electric quantity of a battery is too low or the electric automobile enters a power shortage state during running, the electric automobile is immediately driven to a safe zone, a power-off and parking are carried out, a trunk is opened, a direct-current charging gun and a connecting cable are taken out, one end of the direct-current charging gun is inserted into a direct-current power supply interface seat on a charger, the other end of the direct-current charging gun is inserted into a direct-current charging interface seat on the electric automobile, then a power switch on the charger is pressed, the charger is started, after all the electric automobile is ready, a direct-current plug gun is selected through a touch screen to charge, and the charger starts to execute a direct-current charging flow of the electric automobile;
(2) By checking the touch screen, knowing parameters such as a charging state, a charging current, an SOC (state of charge) and the like, when the SOC of the power battery of the electric automobile is increased enough to enable the automobile to run to an operation site provided with a charging pile, the touch screen can be used for selecting 'stopping charging', ending the direct-current charging process, closing a power supply of the charger, and pulling out a charging cable;
(3) After the vehicle is driven to an operation site provided with a charging pile, the electric vehicle and the charging treasured can be charged simultaneously through the direct current charging pile, a direct current charging gun carried by the vehicle and a connecting cable are respectively plugged into a direct current power supply interface seat on the charging treasured and a direct current charging interface seat on the electric vehicle, then the direct current charging gun of the operation site is plugged into the direct current charging interface seat on the charging treasured, after all the operation sites are ready, one gun is selected to be charged by two through a touch screen, namely, a double charging mode of the direct current charging pile for the electric vehicle and the charging treasured is started, the priority level is divided into two guns, the electric vehicle is charged preferentially, and the charging treasured is charged after the electric vehicle is fully charged;
(4) If the parking lot of the district where the user is located is provided with an alternating-current charging pile, the charging treasured can be subjected to alternating-current charging by the alternating-current charging pile in the period of parking at night, the alternating-current charging time is longer than the direct-current charging time, an alternating-current charging gun is directly inserted into an alternating-current charging interface seat on the charging treasured, and then 'alternating-current gun power-up' is selected through a touch screen, so that the alternating-current charging process of the charging treasured is started to be executed;
(5) If the automobile lead-acid storage battery is deficient in power, and ignition failure of the key switch is caused, the automobile lapping wire attached to the automobile can be utilized to be connected to the positive pole and the negative pole of the automobile lead-acid storage battery from the 12Vdc direct current output interface of the charger, and then the 12Vdc direct current output is selected to be started through the touch screen to provide emergency ignition service;
(6) If the AC output function, the Type-C output function and the USB-A output function on the charger baby are needed to be used, the corresponding load equipment is only needed to be inserted into the corresponding output interface, and then 'starting AC output', 'starting Type-C output' and 'starting USB-A output' are respectively selected through the touch screen, so that external power can be supplied.
Specifically, the invention provides an electric automobile charging device capable of supporting a direct current charging national standard, which can be used as extension and expansion of the function of an electric automobile charging pile, is compatible with a national standard charging communication protocol of 2015 edition, can directly utilize a direct current charging gun carried on a vehicle and a connecting cable to carry out gun inserting fast charging on the electric automobile, and simultaneously supports an outdoor direct current charging pile and an alternating current charging pile to carry out gun inserting fast charging on the electric automobile. In addition, the electric automobile charger can realize a double-charging mode of 'one gun and two charging' of the electric automobile and the charger by the outdoor direct current charging pile, so that two devices are fully filled at one time, the defects of difficult charging, slow charging and inconvenient charging of the electric automobile in the driving process are thoroughly overcome, and the electric automobile charger has higher market popularization value.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (3)

1. The utility model provides ase:Sub>A CAN support electric automobile treasured that direct current charges national standard, ase:Sub>A serial communication comprises ase:Sub>A lithium iron phosphate group battery, battery Management System (BMS), two-way DC/DC isolation conversion power supply, switch switching unit, rectifier unit, direct current charging interface seat, direct current power supply interface seat, alternating current charging interface seat, touch-sensitive screen, AC inverter power supply, DC switching power supply, 12Vdc direct current output interface, type-C output interface, USB-A output interface and AC output interface, two-way DC/DC isolation conversion power supply includes direct current boost circuit and direct current buck circuit, switch switching unit, two-way DC/DC isolation conversion power supply and lithium iron phosphate group battery are in series connection electricity in proper order, direct current charging interface seat and direct current power supply interface seat are in series connection with switch switching unit electricity respectively, AC inverter power supply, DC switching power supply are in series connection with DC inverter power supply, DC switching unit and DC switching unit are in proper order, 12Vdc direct current output interface, type-C output interface and USB-A output interface are in electrical connection with battery group battery, DC switching unit and DC switching unit are in series connection with battery management system (DC/DC switching unit) and DC switching unit are in proper order, switch switching unit and DC/DC power supply are in series connection with switch switching unit electric connection respectively, switch switching unit and DC power supply control system are in order connected with DC/DC isolation switch switching unit and DC conversion power supply respectively, the touch screen is electrically connected with a Battery Management System (BMS), the lithium iron phosphate battery pack comprises 16 strings of high-rate single battery cells, the rated capacity of each high-rate single battery cell is 100Ah, the 16 strings of high-rate single battery cells are electrically connected in series, the rated voltage of the lithium iron phosphate battery pack is 51.2V, the rated capacity of the lithium iron phosphate battery pack is 100Ah, the total electric quantity of the lithium iron phosphate battery pack is 5.12KWh, the total power of the bidirectional DC/DC isolation conversion power supply is 5KW, and the boost output voltage range is 200 Vdc-750 Vdc.
2. The electric automobile charger baby supporting the direct current charging national standard according to claim 1, wherein the output power of the 12Vdc direct current output interface is 13.6Vdc/10A.
3. The electric vehicle charger of claim 1, wherein the AC output interface has an output power of 500W.
CN202110759513.0A 2021-07-05 2021-07-05 Electric automobile that can support direct current charging national standard treasured that charges Active CN113752885B (en)

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