CN110920429B - Vehicle charging and discharging control device and method and vehicle - Google Patents

Vehicle charging and discharging control device and method and vehicle Download PDF

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Publication number
CN110920429B
CN110920429B CN201911226997.1A CN201911226997A CN110920429B CN 110920429 B CN110920429 B CN 110920429B CN 201911226997 A CN201911226997 A CN 201911226997A CN 110920429 B CN110920429 B CN 110920429B
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gun head
charging
charge
discharging
interface
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CN110920429A (en
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毛志强
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China Express Jiangsu Technology Co Ltd
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China Express Jiangsu Technology Co Ltd
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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
    • 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
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • Y02T90/14—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 invention discloses a vehicle charge and discharge control device, a method and a vehicle, wherein the device comprises: a battery interface for connecting a high voltage battery of a vehicle; the charging and discharging interface is connected with the battery interface through a charging and discharging module and is used for connecting the gun head at one end of the charging connecting device so as to be connected with external equipment through the charging connecting device; the control module comprises a type identification unit and a mode control unit, wherein the type identification unit is used for identifying the gun head type of the gun head connected with the charge-discharge interface when the charge-discharge interface is determined to be connected with the external equipment through the charge connecting device; the mode control unit is used for controlling the vehicle and the external equipment to carry out charging handshake and controlling the charging and discharging module to enter a working mode corresponding to the type of the gun head; and the charging and discharging module is used for charging the external equipment by using the direct current provided by the high-voltage battery when the high-voltage battery is in a direct current discharging mode or an alternating current discharging mode. The invention can better realize the charging between the electric automobiles.

Description

Vehicle charging and discharging control device and method and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle charging and discharging control device and method and a vehicle.
Background
With the rapid development of electric automobile technology, electric automobiles with the advantages of economy, environmental protection and the like become vehicles selected by more and more people. When the electric quantity of the electric automobile is insufficient, but no charging pile is arranged nearby for charging, the mutual charging between the automobiles is a better choice.
The scheme in the prior art is that a charging connecting device is used for connecting a power supply vehicle and a power receiving vehicle, and then the power supply vehicle converts direct current provided by a high-voltage battery of the power supply vehicle into alternating current which is then transmitted to the power receiving vehicle through the charging connecting device to charge the high-voltage battery of the power receiving vehicle, so that vehicle-to-vehicle charging is realized.
However, in the process of implementing the present invention, the inventor finds that, in the prior art, the power supply vehicle can only perform ac discharge, but the ac discharge speed is slow, and the high-voltage battery of the electric vehicle can only receive dc charge, so that the power receiving vehicle needs to be further converted into dc after receiving ac power, and the high-voltage battery can be charged, thereby causing low vehicle-to-vehicle charging efficiency and long time consumption of the prior vehicle, and making it impossible to meet the requirement when a user needs to rapidly charge another vehicle.
Disclosure of Invention
The embodiment of the invention provides a vehicle charge and discharge control device, method and vehicle, which can control the vehicle to perform direct current discharge or alternating current discharge according to the recognized gun head type of a gun head connected with a charge and discharge interface, so that external equipment is charged, two optional modes of quick discharge and slow discharge are provided for a user, and the electric vehicles can be charged better.
In order to achieve the above object, an embodiment of the present invention provides a vehicle charge and discharge control device, including a battery interface, a charge and discharge interface, a control module, and a charge and discharge module; wherein,
the battery interface is used for connecting a high-voltage battery of a vehicle;
the charging and discharging interface is connected with the battery interface through the charging and discharging module, and is used for being connected with a gun head at one end of a charging connecting device so as to be connected with external equipment through the charging connecting device; wherein the external device comprises another vehicle;
the control module comprises a type identification unit and a mode control unit;
the type identification unit is used for identifying the gun head type of the gun head connected with the charge and discharge interface when the charge and discharge interface is determined to be connected with the external equipment through the charge connection device; the gun head type comprises a direct current discharge gun head and an alternating current discharge gun head;
the mode control unit is used for controlling the vehicle and the external equipment to carry out charging handshake and controlling the charging and discharging module to enter a working mode corresponding to the type of the gun head; the working modes comprise a direct current discharging mode and an alternating current discharging mode;
the charging and discharging module is used for charging the external equipment by using direct current provided by the high-voltage battery when the charging and discharging module is in the direct current discharging mode; and the controller is also used for converting the direct current provided by the high-voltage battery into alternating current when the controller is in the alternating current discharging mode, and charging the external equipment by using the alternating current obtained by conversion.
As an improvement of the above scheme, the type of the lance head further comprises a direct current charging lance head and an alternating current charging lance head;
the working modes further comprise a direct current charging mode and an alternating current charging mode;
the charging and discharging module is further used for charging the high-voltage battery by using direct current provided by the external equipment when the charging and discharging module is in the direct current charging mode;
the charging and discharging module is further configured to convert alternating current provided by the external device into direct current when the charging and discharging module is in the alternating current charging mode, and charge the high-voltage battery by using the direct current obtained through conversion.
As an improvement of the above scheme, the charging connection device comprises a direct current charging connection device and an alternating current charging connection device;
the charging and discharging interface comprises a direct current charging and discharging interface and an alternating current charging and discharging interface;
the direct-current charging and discharging interface is used for connecting a gun head at one end of the direct-current charging connecting device;
and the alternating-current charging and discharging interface is used for connecting the gun head at one end of the alternating-current charging connecting device.
As an improvement of the above scheme, the type identification unit is specifically configured to:
when a gun head resistance value signal sent by a gun head resistance acquisition circuit is received, if the gun head at one end of the direct current charging and discharging interface is not connected with the direct current charging and discharging connecting device is judged, the alternating current charging and discharging interface is determined to be connected with the external equipment through the alternating current charging and discharging connecting device, the type of the gun head connected with the alternating current charging and discharging interface is determined according to the gun head resistance value signal, and the type of the gun head connected with the alternating current charging and discharging interface is used as the type of the gun head connected with the charging and discharging interface;
when receiving gun head connection state information sent by the direct current charging and discharging interface, if the gun head at one end of the alternating current charging and discharging interface is not connected with the alternating current charging and discharging connecting device is judged, determining that the direct current charging and discharging interface is connected with the external equipment through the direct current charging and discharging connecting device, determining the gun head type of the gun head connected with the direct current charging and discharging interface according to the gun head connection state information, and taking the gun head type of the gun head connected with the direct current charging and discharging interface as the gun head type of the gun head connected with the charging and discharging interface; and the gun head connection state information comprises the gun head type of the gun head connected with the direct-current charge-discharge interface.
As an improvement of the above, the type identification unit is further configured to:
when a gun head resistance value signal sent by the gun head resistance acquisition circuit is received, if the fact that the direct-current charge-discharge interface is connected with the gun head at one end of the direct-current charging connecting device is judged, the fact that the direct-current charge-discharge interface is connected with the external equipment through the direct-current charging connecting device is determined, the gun head type of the gun head connected with the direct-current charge-discharge interface is determined according to the received gun head connection state information, and the gun head type of the gun head connected with the direct-current charge-discharge interface is used as the gun head type of the gun head connected with the charge-discharge interface;
when receiving the gun head connection state information sent by the direct current charging and discharging interface, if the alternating current charging and discharging interface is judged to be connected with the gun head at one end of the alternating current charging and discharging connecting device, determining that the alternating current charging and discharging interface is connected with the external equipment through the alternating current charging and discharging connecting device, determining the gun head type of the gun head connected with the alternating current charging and discharging interface according to the received gun head resistance value signal, and taking the gun head type of the gun head connected with the alternating current charging and discharging interface as the gun head type of the gun head connected with the charging and discharging interface.
As an improvement of the above scheme, the charge and discharge module comprises a direct current charge and discharge unit and an alternating current charge and discharge unit;
the direct current charging and discharging unit is used for acquiring direct current provided by the high-voltage battery through the battery interface when the direct current charging and discharging unit is in the direct current discharging mode, converting the voltage of the direct current provided by the high-voltage battery, and outputting the converted direct current to the external equipment through the direct current charging and discharging interface so as to charge the external equipment;
the direct current charging and discharging unit is further configured to, when the direct current charging and discharging unit is in the direct current charging mode, obtain direct current provided by the external device through the direct current charging and discharging interface, and output the direct current provided by the external device to the high-voltage battery through the battery interface, so as to charge the high-voltage battery;
the alternating current charging and discharging unit is used for acquiring direct current provided by the high-voltage battery through the battery interface when the high-voltage battery is in the alternating current discharging mode, converting the direct current provided by the high-voltage battery into alternating current and outputting the alternating current to the external equipment through the alternating current charging and discharging interface so as to charge the external equipment;
the alternating current charging and discharging unit is further configured to obtain alternating current provided by the external device through the alternating current charging and discharging interface when the high-voltage battery is in the alternating current charging mode, convert the alternating current provided by the external device into direct current, and output the direct current to the high-voltage battery through the battery interface, so as to charge the high-voltage battery.
As an improvement of the above scheme, the battery interface has a positive terminal and a negative terminal, the positive terminal of the battery interface is used for connecting the positive electrode of the high-voltage battery, and the negative terminal of the battery interface is used for connecting the negative electrode of the high-voltage battery;
the direct-current charge-discharge interface is provided with a positive end and a negative end, the positive end of the direct-current charge-discharge interface is used for being connected with the direct-current positive end of the gun head at one end of the direct-current charge connecting device, and the negative end of the direct-current charge-discharge interface is used for being connected with the direct-current negative end of the gun head at one end of the direct-current charge connecting device;
the direct current charging and discharging unit comprises a first controllable switch, a second controllable switch, a third controllable switch, a fourth controllable switch and a first direct current voltage conversion unit;
the first direct-current voltage conversion unit is provided with a positive input end, a positive output end, a negative input end and a negative output end and is used for performing voltage conversion on direct current provided by the high-voltage battery;
one end of the first controllable switch is connected with the positive end of the battery interface, and the other end of the first controllable switch is connected with the positive end of the direct-current charge-discharge interface;
one end of the second controllable switch is connected with the negative end of the battery interface, and the other end of the second controllable switch is connected with the negative end of the direct-current charge-discharge interface;
one end of the third controllable switch is connected with the positive end of the battery interface, the other end of the third controllable switch is connected with the positive input end of the first direct-current voltage conversion unit, and the positive output end of the first direct-current voltage conversion unit is connected with the positive end of the direct-current charge-discharge interface;
one end of the fourth controllable switch is connected with the negative end of the battery interface, the other end of the fourth controllable switch is connected with the negative input end of the first direct-current voltage conversion unit, and the negative output end of the first direct-current voltage conversion unit is connected with the negative end of the direct-current charge-discharge interface;
the control ends of the first controllable switch, the second controllable switch, the third controllable switch and the fourth controllable switch are all connected with the mode control unit;
the mode control unit controls the direct current charging and discharging unit to enter the direct current charging mode by controlling the first controllable switch and the second controllable switch to be closed and the third controllable switch and the fourth controllable switch to be opened;
the mode control unit controls the direct current charging and discharging unit to enter the direct current discharging mode by controlling the first controllable switch and the second controllable switch to be switched off and the third controllable switch and the fourth controllable switch to be switched on.
As an improvement of the above scheme, the ac charge-discharge interface has a positive terminal and a negative terminal, the positive terminal of the ac charge-discharge interface is used for connecting the ac positive terminal of the gun head at one end of the ac charge connection device, and the negative terminal of the ac charge-discharge interface is used for connecting the ac negative terminal of the gun head at one end of the ac charge connection device;
the alternating current charging and discharging unit comprises a fifth controllable switch, a sixth controllable switch and a direct current and alternating current bidirectional conversion unit;
the direct current and alternating current bidirectional conversion unit is provided with a first positive terminal, a second positive terminal, a first negative terminal, a second negative terminal and a control terminal and is used for converting direct current provided by the high-voltage battery into alternating current when the direct current and alternating current bidirectional conversion unit works in an inversion mode; the device is also used for converting alternating current provided by the external equipment into direct current when working in a rectification mode;
one end of the fifth controllable switch is connected with the positive end of the battery interface, the other end of the fifth controllable switch is connected with the first positive end of the direct current and alternating current bidirectional conversion unit, and the second positive end of the direct current and alternating current bidirectional conversion unit is connected with the positive end of the alternating current charging and discharging interface;
one end of the sixth controllable switch is connected with the negative end of the battery interface, the other end of the sixth controllable switch is connected with the first negative end of the direct current and alternating current bidirectional conversion unit, and the second negative end of the direct current and alternating current bidirectional conversion unit is connected with the negative end of the alternating current charge and discharge interface;
the control ends of the fifth controllable switch, the sixth controllable switch and the direct current and alternating current bidirectional conversion unit are all connected with the mode control unit;
the mode control unit controls the fifth controllable switch and the sixth controllable switch to be closed and controls the direct current and alternating current bidirectional conversion unit to work in a rectification mode so as to control the alternating current charging and discharging unit to enter the alternating current charging mode;
the mode control unit controls the fifth controllable switch and the sixth controllable switch to be closed and controls the direct current and alternating current bidirectional conversion unit to work in an inversion mode so as to control the alternating current charging and discharging unit to enter the alternating current discharging mode.
The embodiment of the invention also provides a vehicle which comprises the high-voltage battery and the vehicle charging and discharging control device.
The embodiment of the invention also provides a vehicle charge and discharge control method, which is applied to the vehicle charge and discharge control device and comprises the following steps:
the type identification unit identifies the gun head type of the gun head connected with the charge-discharge interface when the charge-discharge interface is determined to be connected with external equipment through the charge connecting device; the gun head type comprises a direct current discharge gun head and an alternating current discharge gun head;
the mode control unit controls the vehicle to perform charging handshake with the external equipment;
and the mode control unit controls the charge and discharge module to enter a working mode corresponding to the type of the gun head.
Compared with the prior art, according to the vehicle charge and discharge control device and method and the vehicle provided by the embodiment of the invention, when the type identification unit determines that the charge and discharge interface is connected with the external device through the charge connection device, the type of the gun head connected with the charge and discharge interface is identified, the mode control unit controls the vehicle to carry out charge handshake with the external device and controls the charge and discharge module to enter a working mode corresponding to the type of the gun head, and when the charge and discharge module is in a direct current discharge mode, direct current provided by a high-voltage battery of the vehicle is used for charging the external device, or when the charge and discharge module is in an alternating current discharge mode, direct current provided by a high-voltage battery of the vehicle is converted into alternating current, and the alternating current obtained by conversion is used for charging the external device. When the vehicle-to-vehicle discharging is carried out, the vehicle charging and discharging control device can control the vehicle to carry out direct current discharging or alternating current discharging according to the gun head type of the gun head connected with the charging and discharging interface obtained through identification, so that external equipment is charged, the direct current discharging speed is high, the output direct current can directly charge a high-voltage battery of another vehicle, further conversion is not needed, two optional modes of fast discharging and slow discharging can be provided for a user, and the charging between electric vehicles can be better realized.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle charge and discharge control device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a vehicle charge and discharge control device according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Fig. 4 is a schematic flow chart of a vehicle charging and discharging control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a vehicle charge and discharge control device according to an embodiment of the present invention.
The vehicle charge and discharge control device provided by the embodiment of the invention comprises a battery interface A, a charge and discharge interface B, a control module 11 and a charge and discharge module 12; wherein,
the battery interface A is used for connecting a high-voltage battery of a vehicle;
the charging and discharging interface B is connected with the battery interface A through the charging and discharging module 12, and is used for being connected with a gun head at one end of a charging connecting device so as to be connected with external equipment through the charging connecting device; wherein the external device comprises another vehicle;
the control module 11 comprises a type identification unit 111 and a mode control unit 112;
the type identification unit 111 is configured to identify a type of a gun head of the gun head connected to the charge and discharge interface B when the charge and discharge interface B is connected to the external device through the charge connection device; the gun head type comprises a direct current discharge gun head and an alternating current discharge gun head;
the mode control unit 112 is configured to control the vehicle and the external device to perform charging handshake, and control the charge and discharge module 12 to enter a working mode corresponding to the type of the gun head; the working modes comprise a direct current discharging mode and an alternating current discharging mode;
the charging and discharging module 12 is configured to charge the external device with the direct current provided by the high-voltage battery when the charging and discharging module is in the direct current discharging mode; and the controller is also used for converting the direct current provided by the high-voltage battery into alternating current when the controller is in the alternating current discharging mode, and charging the external equipment by using the alternating current obtained by conversion.
It should be noted that, when the gun head type is a direct current discharge gun head, the handshake process between the vehicle and another vehicle follows the GB/T27930 standard; when the gun head type is an alternating current discharge gun head, the handshaking process of the vehicle and another vehicle conforms to the GB/T18487 standard.
The charging connection device is a component for connecting power supply equipment and powered equipment, and can further comprise components such as a charging gun, a discharging gun, a cable control box and the like besides a cable.
It is understood that, during the operation of the vehicle Charge and discharge control device, the battery management system of the vehicle collects and transmits basic information of the battery pack, such as SOC (State of Charge), insulation resistance, and the like, to cooperate with each other.
Alternatively, a discharge end condition may be preset, and the control module 11 controls the charge-discharge module 12 to stop working when detecting that the discharge end condition is met.
In practical application, taking the external device as another vehicle as an example, the battery interface a of the vehicle charging and discharging control device is connected with a high-voltage battery of the vehicle, the charging and discharging interface B is connected with the gun head at one end of the charging connection device, and the gun head at the other end of the charging connection device is connected with the charging and discharging interface of the other vehicle, so that the vehicle is connected with the other vehicle through the charging connection device. The vehicle charge and discharge control device provided by the embodiment has the following working principle:
firstly, when the charging and discharging interface B is connected with another vehicle through the charging connection device, the type identification unit 111 identifies whether the gun head type of the gun head connected with the charging and discharging interface B is a direct-current discharging gun head or an alternating-current discharging gun head; then, the mode control unit 112 controls the vehicle to perform a charging handshake with another vehicle, and controls the charging and discharging module 12 to enter a working mode corresponding to the type of the gun head; then, the charge-discharge module 12 operates according to the operating mode, wherein when the vehicle is in the dc discharge mode, the dc power provided by the high-voltage battery of the vehicle is used to charge the high-voltage battery of another vehicle, or when the vehicle is in the ac discharge mode, the dc power provided by the high-voltage battery of the vehicle is converted into ac power, and the ac power obtained by the conversion is used to charge the high-voltage battery of another vehicle, thereby realizing the charging between the electric vehicles.
On the basis of the above embodiment, as a preferred scheme, the type of the lance head further includes a direct current charging lance head and an alternating current charging lance head;
the working modes further comprise a direct current charging mode and an alternating current charging mode;
the charging and discharging module 12 is further configured to charge the high-voltage battery with the direct current provided by the external device when the charging and discharging module is in the direct current charging mode;
the charging and discharging module 12 is further configured to convert the ac power provided by the external device into dc power when the charging and discharging module is in the ac charging mode, and charge the high-voltage battery with the dc power obtained by the conversion.
It can be understood that the external equipment can also be a charging pile, and the charging and discharging interface B can be a direct-current charging gun head or an alternating-current charging gun head connected with one end of the charging connecting device, so that when the charging connecting device is connected with the charging pile, the charging pile can be used for charging the vehicle in a direct-current mode or in an alternating-current mode, and the practicability and the product integration level of the vehicle charging and discharging control device are improved.
It should be noted that when the gun head is a direct-current charging gun head, the handshaking process between the vehicle and the charging pile conforms to the GB/T27930 standard; when the gun head is an alternating current charging gun head, the handshaking process of the vehicle and the charging pile conforms to the GB/T18487 standard.
Alternatively, a charging end condition may be preset, and the control module 11 controls the charging and discharging module 12 to stop working when detecting that the charging end condition is met.
In practical application, taking the external device as an example of a charging pile, a battery interface a of the vehicle charging and discharging control device is connected with a high-voltage battery of a vehicle, a charging and discharging interface B is connected with a gun head at one end of a charging connecting device, and the other end of the charging connecting device is connected with the charging pile, so that the vehicle is connected with the charging pile through the charging connecting device. The vehicle charge and discharge control device provided by the preferred scheme has the following working principle:
firstly, when the charging and discharging interface B is connected with the charging pile through the charging connection device, the type identification unit 111 identifies whether the gun head type of the gun head connected with the charging and discharging interface B is a direct-current charging gun head or an alternating-current charging gun head; then, the mode control unit 112 controls the vehicle and the charging pile to perform charging handshake, and controls the charging and discharging module 12 to enter a working mode corresponding to the type of the gun head; then, the charge-discharge module 12 works according to the working mode of the charging pile, wherein when the charging pile is in the direct-current charging mode, the direct current provided by the charging pile is used for charging the high-voltage battery of the vehicle, or when the charging pile is in the alternating-current charging mode, the alternating current provided by the charging pile is converted into the direct current, and the direct current obtained by conversion is used for charging the high-voltage battery of the vehicle, so that the charging pile charges the vehicle.
Specifically, referring to fig. 2, the charge and discharge interface B includes a dc charge and discharge interface B1 and an ac charge and discharge interface B2;
the charging connecting device comprises a direct current charging connecting device and an alternating current charging connecting device;
the direct current charging and discharging interface B1 is used for connecting a gun head at one end of the direct current charging connecting device;
and the alternating current charging and discharging interface B2 is used for connecting the gun head at one end of the alternating current charging connecting device.
Optionally, the direct-current charging connection device comprises a direct-current charging gun head, a direct-current discharging gun head and a control box, wherein the direct-current charging gun head and the direct-current discharging gun head both comprise a temperature sensor and an electronic lock.
Optionally, the ac charging connection device includes an ac charging gun head, an ac discharging gun head, and an on-cable control box, where the ac charging gun head and the ac discharging gun head both include a gun head resistor, a temperature sensor, and an electronic lock.
Specifically, the type identification unit 111 is specifically configured to:
when a gun head resistance value signal sent by a gun head resistance acquisition circuit is received, if the fact that the direct current charging and discharging interface B1 is not connected with the gun head at one end of the direct current charging connection device is judged, the fact that the alternating current charging and discharging interface B2 is connected with the external equipment through the alternating current charging connection device is determined, the gun head type of the gun head connected with the alternating current charging and discharging interface B2 is determined according to the gun head resistance value signal, and the gun head type of the gun head connected with the alternating current charging and discharging interface B2 is used as the gun head type of the gun head connected with the charging and discharging interface B;
when receiving gun head connection state information sent by the direct current charge and discharge interface B1, if the alternating current charge and discharge interface B2 is judged not to be connected with a gun head at one end of the alternating current charge and discharge connecting device, determining that the direct current charge and discharge interface B1 is connected with the external equipment through the direct current charge and discharge connecting device, determining the gun head type of the gun head connected with the direct current charge and discharge interface B1 according to the gun head connection state information, and taking the gun head type of the gun head connected with the direct current charge and discharge interface B1 as the gun head type of the gun head connected with the charge and discharge interface B; and the gun head connection state information comprises the gun head type of the gun head connected with the direct current charging and discharging interface B1.
The vehicle comprises a gun head resistance acquisition circuit, wherein the gun head resistance acquisition circuit is used for acquiring a gun head resistance value of a gun head connected with an alternating-current charging and discharging interface B2 when the gun head at one end of the alternating-current charging and discharging connection device is connected with the alternating-current charging and discharging interface B2, generating a gun head resistance value signal and sending the gun head resistance value signal to the type identification unit 111; the resistance acquisition circuit of the gun head is various, and is not limited herein. Therefore, the type identification unit 111 may determine that the ac charging/discharging interface B2 is connected to the torch head at one end of the ac charging connection device when receiving the torch head resistance value signal from the torch head resistance acquisition circuit. It should be noted that the type identification unit 111 determines whether the type of the gun head connected to the ac charge-discharge interface B2 is an ac charging gun head or an ac discharging gun head by determining whether the gun head resistance value included in the gun head resistance value signal is a preset resistance value, if so, determines that the type of the gun head connected to the ac charge-discharge interface B2 is an ac charging gun head, and otherwise, determines that the type of the gun head connected to the ac charge-discharge interface B2 is an ac discharging gun head. It should be noted that the preset resistance value may be set according to the actual structure of the gun head of the ac charging connection device, and optionally, the preset resistance value is 1.5k Ω, 680 Ω, 220 Ω or 100 Ω.
When the direct-current charging and discharging interface B1 is connected with another vehicle or a charging pile through the direct-current charging connection device, the other vehicle or the charging pile CAN perform handshake with the vehicle by sending specific direct-current information according to the rules in the GB/T27930 standard, the specific direct-current information is sent to the type identification unit 111 through the CAN network, and the specific direct-current information includes gun head connection state information and current and voltage information, so that the type identification unit 111 CAN determine that the direct-current charging and discharging interface B1 is connected with the other vehicle or the charging pile through the direct-current charging connection device when receiving the gun head connection state information sent by the other vehicle or the charging pile.
It can be understood that, when receiving the gun head resistance value signal sent by the gun head resistance acquisition circuit, the type identification unit 111 may determine whether the direct current charging and discharging interface B1 is connected to the gun head at one end of the direct current charging connection device by determining whether gun head connection state information sent by the external device is received before the gun head resistance value signal is received; when the gun head connection state information transmitted through the dc charge/discharge interface B1 is received, the type identification unit 111 may determine whether the ac charge/discharge interface B2 is connected to the gun head at one end of the ac charge connection device by determining whether a gun head resistance value signal transmitted from the gun head resistance acquisition circuit has been received before.
Further, the type identification unit 111 is further configured to:
when a gun head resistance value signal sent by the gun head resistance acquisition circuit is received, if the direct current charging and discharging interface B1 is judged to be connected with the gun head at one end of the direct current charging connection device, the direct current charging and discharging interface B1 is determined to be connected with the external equipment through the direct current charging connection device, the type of the gun head connected with the direct current charging and discharging interface B1 is determined according to the received gun head connection state information, and the type of the gun head connected with the direct current charging and discharging interface B1 is used as the type of the gun head connected with the charging and discharging interface B;
when receiving the information of the connection state of the gun head transmitted through the direct current charging and discharging interface B1, if the alternating current charging and discharging interface B2 is judged to be connected with the gun head at one end of the alternating current charging and discharging connecting device, determining that the alternating current charging and discharging interface B2 is connected with the external equipment through the alternating current charging and discharging connecting device, determining the type of the gun head connected with the alternating current charging and discharging interface B2 according to the received signal of the resistance value of the gun head, and taking the type of the gun head connected with the alternating current charging and discharging interface B2 as the type of the gun head connected with the charging and discharging interface B.
It can be understood that, when receiving the gun head resistance value signal sent by the gun head resistance acquisition circuit, if it is determined that the dc charge/discharge interface B1 is connected to the external device through the dc charge connection device, since the dc charge/discharge interface B1 is connected to the external device through the dc charge connection device, the gun head connection state information sent by the external device is received first, the type of the gun head connected to the dc charge/discharge interface B1 may be determined according to the received gun head connection state information sent through the dc charge/discharge interface B1, and the type of the gun head connected to the dc charge/discharge interface B1 is used as the type of the gun head connected to the charge/discharge interface B, so as to ensure that the vehicle and the external device continue to perform dc discharge or dc charge.
It can be understood that, when the gun head connection state information sent through the dc charging and discharging interface B1 is received by the type identifying unit 111, if it is determined that the ac charge and discharge interface B2 and the external device have been connected through the ac charge connection means, because the gun head resistance acquisition circuit is arranged when the gun head at one end of the alternating current charging connecting device is connected with the alternating current charging and discharging interface B2, the gun head resistance value of the gun head connected with the alternating current charge and discharge interface B2 is collected and a gun head resistance value signal is generated and sent to the type identification unit 111, therefore, the gun head type of the gun head connected with the alternating current charge and discharge interface B2 can be determined according to the received gun head resistance value signal sent by the gun head resistance acquisition circuit, and the gun head type of the gun head connected with the alternating current charging and discharging interface B2 is used as the gun head type of the gun head connected with the charging and discharging interface B, so that the vehicle and external equipment can continue to carry out alternating current discharging or alternating current charging.
Further, referring to fig. 2, the charge and discharge module 12 includes a dc charge and discharge unit 121 and an ac charge and discharge unit 122;
the dc charging and discharging unit 121 is configured to, when in the dc discharging mode, obtain the dc power provided by the high-voltage battery through the battery interface a, perform voltage conversion on the dc power provided by the high-voltage battery, and output the dc power to the external device through the dc charging and discharging interface B1, so as to charge the external device;
the dc charging and discharging unit 121 is further configured to, when in the dc charging mode, obtain the dc power provided by the external device through the dc charging and discharging interface B1, and output the dc power provided by the external device to the high-voltage battery through the battery interface a, so as to charge the high-voltage battery;
the ac charging and discharging unit 122 is configured to, when in the ac discharging mode, obtain the direct current provided by the high-voltage battery through the battery interface a, convert the direct current provided by the high-voltage battery into an alternating current, and output the alternating current to the external device through the ac charging and discharging interface B2, so as to charge the external device;
the ac charging and discharging unit 122 is further configured to, when in the ac charging mode, obtain ac power provided by the external device through the ac charging and discharging interface B2, convert the ac power provided by the external device into dc power, and output the dc power to the high-voltage battery through the battery interface a, so as to charge the high-voltage battery.
Further, referring to fig. 2, the battery interface a has a positive terminal a1 and a negative terminal a2, the positive terminal a1 of the battery interface a is used for connecting the positive electrode of the high voltage battery, and the negative terminal a2 of the battery interface a is used for connecting the negative electrode of the high voltage battery;
the direct-current charge and discharge interface B1 has a positive end B1a and a negative end B1B, the positive end B1a of the direct-current charge and discharge interface B1 is used for connecting the direct-current positive end of the gun head at one end of the direct-current charge connection device, and the negative end B1B of the direct-current charge and discharge interface B1 is used for connecting the direct-current negative end of the gun head at one end of the direct-current charge connection device;
the dc charging and discharging unit 121 includes a first controllable switch K1, a second controllable switch K2, a third controllable switch K3, a fourth controllable switch K4, and a first dc voltage converting unit 1211;
the first dc voltage conversion unit 1211 having a positive input end 1211a, a positive output end 1211b, a negative input end 1211c and a negative output end 1211d, for performing voltage conversion on the dc power provided by the high voltage battery;
one end of the first controllable switch K1 is connected to the positive terminal a1 of the battery interface a, and the other end of the first controllable switch K1 is connected to the positive terminal B1a of the dc charging/discharging interface B1;
one end of the second controllable switch K2 is connected to the negative terminal a2 of the battery interface a, and the other end of the second controllable switch K2 is connected to the negative terminal B1B of the dc charge-discharge interface B1;
one end of the third controllable switch K3 is connected to the positive terminal a1 of the battery interface a, the other end of the third controllable switch K3 is connected to the positive input end 1211a of the first dc voltage conversion unit 1211, and the positive output end 1211B of the first dc voltage conversion unit 1211 is connected to the positive terminal B1a of the dc charge/discharge interface B1;
one end of the fourth controllable switch K4 is connected to the negative terminal a2 of the battery interface a, the other end of the fourth controllable switch K4 is connected to the negative input end 1211c of the first dc voltage conversion unit 1211, and the negative input end 1211d of the first dc voltage conversion unit 1211 is connected to the negative terminal B1B of the dc charge/discharge interface B1;
the control terminals of the first controllable switch K1, the second controllable switch K2, the third controllable switch K3 and the fourth controllable switch K4 are all connected to the mode control unit 112;
the mode control unit 112 controls the dc charging and discharging unit 121 to enter the dc charging mode by controlling the first controllable switch K1 and the second controllable switch K2 to be closed and the third controllable switch K3 and the fourth controllable switch K4 to be opened;
the mode control unit 112 controls the dc charging and discharging unit 121 to enter the dc discharging mode by controlling the first controllable switch K1 and the second controllable switch K2 to be open, and the third controllable switch K3 and the fourth controllable switch K4 to be closed.
Still further, referring to fig. 2, the ac charge and discharge interface B2 has a positive terminal B2a and a negative terminal B2B, the positive terminal B2a of the ac charge and discharge interface B2 is used for connecting the ac positive terminal of the gun head at one end of the ac charge connection device, and the negative terminal B2B of the ac charge and discharge interface B2 is used for connecting the ac negative terminal of the gun head at one end of the ac charge connection device;
the ac charging and discharging unit 122 includes a fifth controllable switch K5, a sixth controllable switch K6, and a dc-ac bidirectional conversion unit 1221;
the dc-ac bidirectional conversion unit 1221 has a first positive terminal 1221a, a second positive terminal 1221b, a first negative terminal 1221c, a second negative terminal 1221d, and a control terminal 1221e, and is configured to convert the dc power provided by the high-voltage battery into ac power when operating in an inverter mode; the device is also used for converting alternating current provided by the external equipment into direct current when working in a rectification mode;
one end of the fifth controllable switch K5 is connected to the positive terminal a1 of the battery interface a, the other end of the fifth controllable switch K5 is connected to the first positive terminal 1221a of the dc-ac bidirectional conversion unit 1221, and the second positive terminal 1221B of the dc-ac bidirectional conversion unit 1221 is connected to the positive terminal B2a of the ac charge-discharge interface B2;
one end of the sixth controllable switch K6 is connected to the negative end a2 of the battery interface a, the other end of the sixth controllable switch K6 is connected to the first negative end 1221c of the dc-ac bidirectional conversion unit 1221, and the second negative end 1221d of the dc-ac bidirectional conversion unit 1221 is connected to the negative end B2B of the ac charge-discharge interface B2;
the control terminals of the fifth controllable switch K5, the sixth controllable switch K6 and the dc-ac bidirectional conversion unit 1221 are all connected to the mode control unit 112;
the mode control unit 112 controls the fifth controllable switch K5 and the sixth controllable switch K6 to be closed, and controls the dc-ac bidirectional conversion unit 1221 to operate in a rectification mode, so as to control the ac charging and discharging unit 122 to enter the ac charging mode;
the mode control unit 112 controls the fifth controllable switch K5 and the sixth controllable switch K6 to be closed, and controls the dc/ac bidirectional conversion unit 1221 to operate in an inverter mode, so as to control the ac charging/discharging unit 122 to enter the ac discharging mode.
Still further, referring to fig. 2, the vehicle charge and discharge control apparatus further includes a second dc voltage conversion unit 13;
the second dc voltage converting unit 13 has a positive input end 13a, a negative input end 13b, a positive output end 13c and a negative output end 13d, and is configured to convert the voltage of the dc power provided by the high-voltage battery and transmit the converted dc power to the low-voltage battery of the vehicle, so as to charge the low-voltage battery;
the positive input end 13a of the second dc voltage conversion unit 13 is connected to the positive end a1 of the battery interface a, the positive output end 13c of the second dc voltage conversion unit 13 is connected to the positive electrode of the low-voltage battery, the negative input end 13b of the second dc voltage conversion unit 13 is connected to the negative end a2 of the battery interface a, and the negative output end 13d of the second dc voltage conversion unit 13 is connected to the negative electrode of the low-voltage battery.
According to the vehicle charge and discharge control device provided by the embodiment of the invention, the type identification unit identifies the gun head type of the gun head connected with the charge and discharge interface when determining that the charge and discharge interface is connected with the external device through the charge connection device, the mode control unit controls the vehicle and the external device to carry out charge handshake and controls the charge and discharge module to enter the working mode corresponding to the gun head type, and when the charge and discharge module is in the direct current discharge mode, the direct current provided by the high-voltage battery of the vehicle is used for charging the external device, or when the charge and discharge module is in the alternating current discharge mode, the direct current provided by the high-voltage battery of the vehicle is converted into the alternating current, and the alternating current. When the vehicle-to-vehicle discharging is carried out, the vehicle charging and discharging control device can control the vehicle to carry out direct current discharging or alternating current discharging according to the gun head type of the gun head connected with the charging and discharging interface obtained through identification, so that external equipment is charged, the direct current discharging speed is high, the output direct current can directly charge a high-voltage battery of another vehicle, further conversion is not needed, two optional modes of fast discharging and slow discharging can be provided for a user, and the charging between electric vehicles can be better realized.
The vehicle charge and discharge control device provided by the embodiment of the invention can be applied to a vehicle, and is a structural schematic diagram of the vehicle provided by the embodiment of the invention, referring to fig. 3.
The vehicle provided by the embodiment of the invention comprises a high-voltage battery 21 and the vehicle charge and discharge control device 22 in any embodiment.
The high-voltage battery 21 is connected to a battery interface of the vehicle charge/discharge control device 22.
The process of obtaining the effect of the vehicle is as described in any of the above embodiments, and is not described herein again.
In the vehicle provided by the embodiment of the invention, the type identification unit identifies the gun head type of the gun head connected with the charge-discharge interface when determining that the charge-discharge interface is connected with the external device through the charge connection device, the mode control unit controls the vehicle and the external device to perform charge handshake and controls the charge-discharge module to enter the working mode corresponding to the gun head type, and the charge-discharge module charges the external device by using direct current provided by a high-voltage battery of the vehicle when in a direct current discharge mode or converts direct current provided by a high-voltage battery of the vehicle into alternating current when in an alternating current discharge mode and charges the external device by using the alternating current obtained by conversion. When the vehicle-to-vehicle discharging is carried out, the vehicle charging and discharging control device can control the vehicle to carry out direct current discharging or alternating current discharging according to the gun head type of the gun head connected with the charging and discharging interface obtained through identification, so that external equipment is charged, the direct current discharging speed is high, the output direct current can directly charge a high-voltage battery of another vehicle, further conversion is not needed, two optional modes of fast discharging and slow discharging can be provided for a user, and the charging between electric vehicles can be better realized.
Correspondingly, the embodiment of the invention also provides a vehicle charging and discharging control method, which can be applied to the vehicle charging and discharging control device in any embodiment.
Fig. 4 is a schematic flow chart of a vehicle charging and discharging control method according to an embodiment of the present invention.
The vehicle charge and discharge control method provided by the embodiment of the invention is applied to the vehicle charge and discharge control device of any one of the embodiments, and comprises the following steps:
s11, when the type identification unit determines that the charge-discharge interface is connected with an external device through a charge connection device, identifying the type of a gun head connected with the charge-discharge interface; the gun head type comprises a direct current discharge gun head and an alternating current discharge gun head;
s12, the mode control unit controls the vehicle to perform charging handshake with the external device;
and S13, the mode control unit controls the charging and discharging module to enter a working mode corresponding to the type of the gun head.
The process of the vehicle charge and discharge control method applied to the vehicle charge and discharge control device according to any of the above embodiments to achieve the effects is as described in any of the above embodiments, and is not repeated herein.
According to the vehicle charge and discharge control method provided by the embodiment of the invention, when the charge and discharge interface is determined to be connected with the external device through the charge connecting device, the type identification unit identifies the gun head type of the gun head connected with the charge and discharge interface, the mode control unit controls the vehicle and the external device to carry out charge handshake and controls the charge and discharge module to enter the working mode corresponding to the gun head type, and when the charge and discharge module is in the direct current discharge mode, the direct current provided by a high-voltage battery of the vehicle is used for charging the external device, or when the charge and discharge module is in the alternating current discharge mode, the direct current provided by a high-voltage battery of the vehicle is converted into the alternating current, and the alternating current obtained by conversion is used for charging the external device. When the vehicle-to-vehicle discharging is carried out, the vehicle charging and discharging control device can control the vehicle to carry out direct current discharging or alternating current discharging according to the gun head type of the gun head connected with the charging and discharging interface obtained through identification, so that external equipment is charged, the direct current discharging speed is high, the output direct current can directly charge a high-voltage battery of another vehicle, further conversion is not needed, two optional modes of fast discharging and slow discharging can be provided for a user, and the charging between electric vehicles can be better realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A vehicle charge and discharge control device is characterized by comprising a battery interface, a charge and discharge interface, a control module and a charge and discharge module; wherein,
the battery interface is used for connecting a high-voltage battery of a vehicle;
the charging and discharging interface is connected with the battery interface through the charging and discharging module, and is used for being connected with a gun head at one end of a charging connecting device so as to be connected with external equipment through the charging connecting device; wherein the external device comprises another vehicle; the charging connecting device comprises a direct current charging connecting device and an alternating current charging connecting device; the charging and discharging interface comprises a direct current charging and discharging interface and an alternating current charging and discharging interface; the direct-current charging and discharging interface is used for connecting a gun head at one end of the direct-current charging connecting device; the alternating-current charging and discharging interface is used for connecting the gun head at one end of the alternating-current charging connecting device;
the control module comprises a type identification unit and a mode control unit;
the type identification unit is used for identifying the gun head type of the gun head connected with the charge and discharge interface when the charge and discharge interface is determined to be connected with the external equipment through the charge connection device; the gun head type comprises a direct current discharge gun head and an alternating current discharge gun head;
the mode control unit is used for controlling the vehicle and the external equipment to carry out charging handshake and controlling the charging and discharging module to enter a working mode corresponding to the type of the gun head; the working modes comprise a direct current discharging mode and an alternating current discharging mode;
the charging and discharging module is used for charging the external equipment by using direct current provided by the high-voltage battery when the charging and discharging module is in the direct current discharging mode; the high-voltage battery is used for providing a high-voltage power supply for the external equipment, and is also used for converting direct current provided by the high-voltage battery into alternating current when the high-voltage battery is in the alternating current discharging mode and charging the external equipment by using the alternating current obtained by conversion;
wherein the type identification unit is specifically configured to: when a gun head resistance value signal sent by a gun head resistance acquisition circuit is received, if the gun head at one end of the direct current charging and discharging interface is not connected with the direct current charging and discharging connecting device is judged, the alternating current charging and discharging interface is determined to be connected with the external equipment through the alternating current charging and discharging connecting device, the type of the gun head connected with the alternating current charging and discharging interface is determined according to the gun head resistance value signal, and the type of the gun head connected with the alternating current charging and discharging interface is used as the type of the gun head connected with the charging and discharging interface;
when receiving gun head connection state information sent by the direct current charging and discharging interface, if the gun head at one end of the alternating current charging and discharging interface is not connected with the alternating current charging and discharging connecting device is judged, determining that the direct current charging and discharging interface is connected with the external equipment through the direct current charging and discharging connecting device, determining the gun head type of the gun head connected with the direct current charging and discharging interface according to the gun head connection state information, and taking the gun head type of the gun head connected with the direct current charging and discharging interface as the gun head type of the gun head connected with the charging and discharging interface; and the gun head connection state information comprises the gun head type of the gun head connected with the direct-current charge-discharge interface.
2. The vehicle charge and discharge control device according to claim 1, wherein the types of the gun heads further include a dc charging gun head and an ac charging gun head;
the working modes further comprise a direct current charging mode and an alternating current charging mode;
the charging and discharging module is further used for charging the high-voltage battery by using direct current provided by the external equipment when the charging and discharging module is in the direct current charging mode;
the charging and discharging module is further configured to convert alternating current provided by the external device into direct current when the charging and discharging module is in the alternating current charging mode, and charge the high-voltage battery by using the direct current obtained through conversion.
3. The vehicle charge and discharge control apparatus according to claim 1, wherein the type identifying unit is further configured to:
when a gun head resistance value signal sent by the gun head resistance acquisition circuit is received, if the fact that the direct-current charge-discharge interface is connected with the gun head at one end of the direct-current charging connecting device is judged, the fact that the direct-current charge-discharge interface is connected with the external equipment through the direct-current charging connecting device is determined, the gun head type of the gun head connected with the direct-current charge-discharge interface is determined according to the received gun head connection state information, and the gun head type of the gun head connected with the direct-current charge-discharge interface is used as the gun head type of the gun head connected with the charge-discharge interface;
when receiving the gun head connection state information sent by the direct current charging and discharging interface, if the alternating current charging and discharging interface is judged to be connected with the gun head at one end of the alternating current charging and discharging connecting device, determining that the alternating current charging and discharging interface is connected with the external equipment through the alternating current charging and discharging connecting device, determining the gun head type of the gun head connected with the alternating current charging and discharging interface according to the received gun head resistance value signal, and taking the gun head type of the gun head connected with the alternating current charging and discharging interface as the gun head type of the gun head connected with the charging and discharging interface.
4. The vehicle charge and discharge control device according to claim 2, wherein the charge and discharge module includes a dc charge and discharge unit and an ac charge and discharge unit;
the direct current charging and discharging unit is used for acquiring direct current provided by the high-voltage battery through the battery interface when the direct current charging and discharging unit is in the direct current discharging mode, converting the voltage of the direct current provided by the high-voltage battery, and outputting the converted direct current to the external equipment through the direct current charging and discharging interface so as to charge the external equipment;
the direct current charging and discharging unit is further configured to, when the direct current charging and discharging unit is in the direct current charging mode, obtain direct current provided by the external device through the direct current charging and discharging interface, and output the direct current provided by the external device to the high-voltage battery through the battery interface, so as to charge the high-voltage battery;
the alternating current charging and discharging unit is used for acquiring direct current provided by the high-voltage battery through the battery interface when the high-voltage battery is in the alternating current discharging mode, converting the direct current provided by the high-voltage battery into alternating current and outputting the alternating current to the external equipment through the alternating current charging and discharging interface so as to charge the external equipment;
the alternating current charging and discharging unit is further configured to obtain alternating current provided by the external device through the alternating current charging and discharging interface when the high-voltage battery is in the alternating current charging mode, convert the alternating current provided by the external device into direct current, and output the direct current to the high-voltage battery through the battery interface, so as to charge the high-voltage battery.
5. The vehicle charge and discharge control device according to claim 4, wherein the battery interface has a positive terminal for connecting to a positive terminal of the high-voltage battery and a negative terminal for connecting to a negative terminal of the high-voltage battery;
the direct-current charge-discharge interface is provided with a positive end and a negative end, the positive end of the direct-current charge-discharge interface is used for being connected with the direct-current positive end of the gun head at one end of the direct-current charge connecting device, and the negative end of the direct-current charge-discharge interface is used for being connected with the direct-current negative end of the gun head at one end of the direct-current charge connecting device;
the direct current charging and discharging unit comprises a first controllable switch, a second controllable switch, a third controllable switch, a fourth controllable switch and a first direct current voltage conversion unit;
the first direct-current voltage conversion unit is provided with a positive input end, a positive output end, a negative input end and a negative output end and is used for performing voltage conversion on direct current provided by the high-voltage battery;
one end of the first controllable switch is connected with the positive end of the battery interface, and the other end of the first controllable switch is connected with the positive end of the direct-current charge-discharge interface;
one end of the second controllable switch is connected with the negative end of the battery interface, and the other end of the second controllable switch is connected with the negative end of the direct-current charge-discharge interface;
one end of the third controllable switch is connected with the positive end of the battery interface, the other end of the third controllable switch is connected with the positive input end of the first direct-current voltage conversion unit, and the positive output end of the first direct-current voltage conversion unit is connected with the positive end of the direct-current charge-discharge interface;
one end of the fourth controllable switch is connected with the negative end of the battery interface, the other end of the fourth controllable switch is connected with the negative input end of the first direct-current voltage conversion unit, and the negative output end of the first direct-current voltage conversion unit is connected with the negative end of the direct-current charge-discharge interface;
the control ends of the first controllable switch, the second controllable switch, the third controllable switch and the fourth controllable switch are all connected with the mode control unit;
the mode control unit controls the direct current charging and discharging unit to enter the direct current charging mode by controlling the first controllable switch and the second controllable switch to be closed and the third controllable switch and the fourth controllable switch to be opened;
the mode control unit controls the direct current charging and discharging unit to enter the direct current discharging mode by controlling the first controllable switch and the second controllable switch to be switched off and the third controllable switch and the fourth controllable switch to be switched on.
6. The vehicle charge and discharge control device according to claim 5, wherein the ac charge and discharge interface has a positive terminal for connecting to the ac positive terminal of the gun head at the one end of the ac charge connection device and a negative terminal for connecting to the ac negative terminal of the gun head at the one end of the ac charge connection device;
the alternating current charging and discharging unit comprises a fifth controllable switch, a sixth controllable switch and a direct current and alternating current bidirectional conversion unit;
the direct current and alternating current bidirectional conversion unit is provided with a first positive terminal, a second positive terminal, a first negative terminal, a second negative terminal and a control terminal and is used for converting direct current provided by the high-voltage battery into alternating current when the direct current and alternating current bidirectional conversion unit works in an inversion mode; the device is also used for converting alternating current provided by the external equipment into direct current when working in a rectification mode;
one end of the fifth controllable switch is connected with the positive end of the battery interface, the other end of the fifth controllable switch is connected with the first positive end of the direct current and alternating current bidirectional conversion unit, and the second positive end of the direct current and alternating current bidirectional conversion unit is connected with the positive end of the alternating current charging and discharging interface;
one end of the sixth controllable switch is connected with the negative end of the battery interface, the other end of the sixth controllable switch is connected with the first negative end of the direct current and alternating current bidirectional conversion unit, and the second negative end of the direct current and alternating current bidirectional conversion unit is connected with the negative end of the alternating current charge and discharge interface;
the control ends of the fifth controllable switch, the sixth controllable switch and the direct current and alternating current bidirectional conversion unit are all connected with the mode control unit;
the mode control unit controls the fifth controllable switch and the sixth controllable switch to be closed and controls the direct current and alternating current bidirectional conversion unit to work in a rectification mode so as to control the alternating current charging and discharging unit to enter the alternating current charging mode;
the mode control unit controls the fifth controllable switch and the sixth controllable switch to be closed and controls the direct current and alternating current bidirectional conversion unit to work in an inversion mode so as to control the alternating current charging and discharging unit to enter the alternating current discharging mode.
7. A vehicle characterized by comprising a high-voltage battery and the vehicle charge-discharge control apparatus according to any one of claims 1 to 6.
8. A vehicle charge-discharge control method applied to the vehicle charge-discharge control apparatus according to any one of claims 1 to 6, comprising:
the type identification unit identifies the gun head type of the gun head connected with the charge-discharge interface when the charge-discharge interface is determined to be connected with external equipment through the charge connecting device; the gun head type comprises a direct current discharge gun head and an alternating current discharge gun head;
the mode control unit controls the vehicle to perform charging handshake with the external equipment;
the mode control unit controls the charge and discharge module to enter a working mode corresponding to the type of the gun head;
when determining that the charge-discharge interface is connected with external equipment through the charging connecting device, the type identification unit identifies the gun head type of the gun head connected with the charge-discharge interface, and the type identification unit comprises:
when receiving a gun head resistance value signal sent by a gun head resistance acquisition circuit, the type identification unit determines that the alternating current charge-discharge interface is connected with the external equipment through the alternating current charging connection device if the direct current charge-discharge interface is judged not to be connected with the gun head at one end of the direct current charging connection device, determines the gun head type of the gun head connected with the alternating current charge-discharge interface according to the gun head resistance value signal, and takes the gun head type of the gun head connected with the alternating current charge-discharge interface as the gun head type of the gun head connected with the charge-discharge interface;
when receiving gun head connection state information sent by the direct current charge and discharge interface, the type identification unit determines that the direct current charge and discharge interface is connected with the external equipment through the direct current charge connection device if the alternating current charge and discharge interface is judged to be not connected with the gun head at one end of the alternating current charge and discharge connection device, determines the gun head type of the gun head connected with the direct current charge and discharge interface according to the gun head connection state information, and takes the gun head type of the gun head connected with the direct current charge and discharge interface as the gun head type of the gun head connected with the charge and discharge interface; and the gun head connection state information comprises the gun head type of the gun head connected with the direct-current charge-discharge interface.
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