CN113858986B - Charging switching device, vehicle and method for identifying charging and discharging modes of vehicle - Google Patents

Charging switching device, vehicle and method for identifying charging and discharging modes of vehicle Download PDF

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Publication number
CN113858986B
CN113858986B CN202010617165.9A CN202010617165A CN113858986B CN 113858986 B CN113858986 B CN 113858986B CN 202010617165 A CN202010617165 A CN 202010617165A CN 113858986 B CN113858986 B CN 113858986B
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China
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vehicle
charging
terminal
connection
charge
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CN113858986A (en
Inventor
程东
石雷
罗建兴
薛鹏辉
陈明文
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BYD Co Ltd
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BYD 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
    • 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
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
    • H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

The invention discloses a charging switching device, a vehicle and a method for identifying a charging and discharging mode of the vehicle, wherein the charging switching device comprises the following components: a direct current side connection port adapted to be connected with a direct current charging device; an ac side connection port adapted to be connected with a vehicle-mounted ac charging receptacle; the first end of the first resistor unit is connected with the first switch in series, and the second end of the first resistor unit is connected with the second node in series; the first switch is a normally open switch, and is switched to a closed state when the alternating-current side connecting port and the vehicle-mounted alternating-current charging socket are in a matched connection state. The device can realize the switching of direct current power supply signals, realize the matching of a direct current charging interface and an alternating current charging interface, and provide support for realizing the direct current charging function of a vehicle with only the alternating current charging interface on the premise of not modifying a vehicle body die and a model.

Description

Charging switching device, vehicle and method for identifying charging and discharging modes of vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a charging switching device, a vehicle and a method for identifying a charging and discharging mode of the vehicle.
Background
New energy automobiles and new energy facility industries are vigorously developed, and as subsidies gradually trend to charging operation facility enterprises, public charging stations are vacated again. In the existing hybrid vehicles, only an alternating-current charging port is supported, and the vehicles can be charged only through an alternating-current jack, an alternating-current charging station and the like, but the alternating-current charging has the defects of smaller charging power and slower charging speed. Meanwhile, public charging is greatly developed by governments and social resources in various places, but the yield of an alternating-current charging station is low, the construction wish of an operator is gradually reduced, and the operator is more prone to building a direct-current charging station, so that a hybrid vehicle cannot enjoy the development bonus of the public charging station, a dilemma of difficult charging is formed, the hybrid vehicle is slow to charge, and the vehicle using experience of a user is seriously affected.
In the related art, a direct current charging port is added on the side wall of a vehicle, so that the mode of alternating current charging port and direct current charging port is adopted, and the vehicle can select two charging modes. However, the scheme has high cost, needs to modify the die and the shape of the car body, can be only implemented on newly developed car models, and cannot be applied to outgoing cars.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a charging switching device, which can realize switching of a dc power signal, realize matching of a dc charging interface and an ac charging interface, and provide support for realizing a dc charging function for a vehicle having only the ac charging interface without modifying a vehicle body mold and a model.
Another object of the present invention is to provide a vehicle.
The third objective of the present invention is to provide a method for identifying a charge-discharge mode of a vehicle.
In order to solve the above-mentioned problems, an embodiment of a first aspect of the present invention provides a charging switching device, including: the direct-current side connection port is suitable for being connected with direct-current charging equipment and comprises a direct-current power supply positive terminal, a direct-current power supply negative terminal, a first grounding terminal and a first connection control confirmation terminal; an ac side connection port adapted to be connected with a vehicle-mounted ac charging receptacle, the ac side connection port including a first ac-to-ac terminal, a neutral terminal, a second ground terminal, and a second connection control confirmation terminal; the positive terminal of the direct current power supply is electrically connected with the first alternating current terminal, the negative terminal of the direct current power supply is electrically connected with the neutral line terminal, the first grounding terminal is electrically connected with the second grounding terminal, a first node is arranged on a connecting line of the first grounding terminal and the second grounding terminal, the first connection control confirmation terminal is electrically connected with the second connection control confirmation terminal, and a second node is arranged on a connecting line of the first connection control confirmation terminal and the second connection control confirmation terminal; the first end of the first resistor unit connected in series with the first switch is connected with the first node, and the second end of the first resistor unit connected in series with the first switch is connected with the second node; the first switch is a normally open switch, and is switched to a closed state when the alternating-current side connecting port and the vehicle-mounted alternating-current charging socket are in a matched connection state.
According to the charging switching device provided by the embodiment of the invention, the direct-current side connecting port is connected with the direct-current charging equipment, the alternating-current side connecting port is connected with the vehicle-mounted alternating-current charging socket, and the physical connection between the vehicle side and the direct-current charging equipment side is realized in a transfer mode of the charging switching device, so that a direct-current power supply signal of the direct-current charging equipment is switched into the vehicle through the charging switching device to realize the direct-current charging function of the vehicle.
In some embodiments, the dc side connection port further comprises a first communication terminal, a second communication terminal, a first connection confirmation terminal, a first auxiliary power terminal, and a second auxiliary power terminal; the alternating current side connection port further comprises a second phase alternating current terminal, a third phase alternating current terminal and a second connection confirmation terminal; the first communication terminal is electrically connected with the second phase alternating current terminal, the second communication terminal is electrically connected with the third phase alternating current terminal, and the first connection confirmation terminal, the second connection confirmation terminal, the first auxiliary power terminal and the second auxiliary power terminal are empty.
An embodiment of a second aspect of the present invention provides a vehicle including: the vehicle-mounted alternating-current charging socket is suitable for being matched and connected with the charging switching device in the embodiment, and comprises a third grounding terminal, a third connection confirmation terminal and a third connection control confirmation terminal; the first end of the second resistor unit is connected with the third grounding terminal and the vehicle body ground respectively, and the second end of the second resistor unit is connected with the third connection control confirmation terminal through a diode; the first end of the third resistor unit, which is connected with the second switch in series, is respectively connected with the third grounding terminal and the vehicle body ground, the second end of the third resistor unit, which is connected with the second switch in series, is connected with the second end of the second resistor unit, and the second switch is a normally open switch; the first detection end of the vehicle control device is connected with the third connection confirmation terminal, a first detection point is arranged between the first detection end and the third connection confirmation terminal, the second detection end of the vehicle control device is connected to a connecting line of the second end of the second resistance unit and the diode, and the connecting point is used as a second detection point and used for identifying a charge-discharge mode according to the resistance value between the first detection point and the third grounding end.
According to the vehicle provided by the embodiment of the invention, the vehicle-mounted alternating-current charging socket can be matched and connected with the charging switching device provided by the embodiment, so that the vehicle can be directly connected with alternating-current charging equipment to realize an alternating-current charging function, and can be indirectly connected with direct-current charging equipment to realize a direct-current charging function without modifying a vehicle body die and a model, and the cost is reduced.
In some embodiments, when the vehicle control device identifies the charge-discharge mode, the vehicle control device is configured to determine that the charge-discharge mode is an ac charge-discharge mode when detecting that the resistance value between the first detection point and the third ground terminal is an ac charge standard resistance value, or determine that the charge-discharge mode is a dc charge-discharge mode when detecting that the resistance value between the first detection point and the third ground terminal is a dc charge standard resistance value.
In some embodiments, in the direct current charge-discharge mode, in a connection loop where the first detection point and the third ground terminal are located, a total resistance of a resistance of the first resistance unit of the charge switching device, a resistance of the second resistance unit of the vehicle, and a resistance of the diode is a resistance between the first detection point and the third ground terminal.
In some embodiments, when the vehicle control device identifies the charging and discharging mode, the vehicle control device is further configured to determine that the direct current charging device and the charging switching device are connected to the vehicle-mounted alternating current charging socket when detecting that the voltage value between the second detection point and the vehicle body ground is increased from a zero value to a direct current charging standard voltage value.
An embodiment of a third aspect of the present invention provides a method for identifying a charge-discharge mode of a vehicle, for a vehicle provided in the foregoing embodiment, the method including: acquiring a resistance value between a first detection point and a third grounding end; and identifying a charge-discharge mode according to the resistance value between the first detection point and the third grounding end.
According to the method for identifying the charge and discharge modes of the vehicle, the charge and discharge modes of the vehicle are identified according to the detected resistance values through the resistance values between the first detection point and the third grounding end, which are obtained by the vehicle control device, so that the vehicle can be matched with the charge and discharge functions conveniently, and references are provided for direct current or alternating current charge and discharge control of the vehicle.
In some embodiments, identifying a charge-discharge pattern from a resistance value between the first detection point and the third ground terminal includes:
when the resistance value between the first detection point and the third grounding end is detected to be an alternating current charging standard resistance value, determining that the charging and discharging mode is an alternating current charging and discharging mode; or, if the resistance value between the first detection point and the third grounding end is detected to be the direct-current charging standard resistance value, determining that the charging and discharging mode is a direct-current charging and discharging mode.
In some embodiments, in the direct current charge-discharge mode, in a connection loop where the first detection point and the third ground terminal are located, a total resistance of a resistance of the first resistance unit of the charge switching device, a resistance of the second resistance unit of the vehicle, and a resistance of the diode is a resistance between the first detection point and the third ground terminal.
In some embodiments, the method further comprises: and if the voltage value between the second detection point and the ground of the vehicle body is detected to be increased from a zero value to a direct-current charging standard voltage value, determining that the direct-current charging equipment and the charging switching device are connected with the vehicle-mounted alternating-current charging socket.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of a charge switching device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection of a vehicle for DC charging using a charging adapter according to one embodiment of the invention;
FIG. 3 is a schematic illustration of a connection of a vehicle for AC charging according to one embodiment of the invention;
FIG. 4 is a timing diagram of voltage and switching states during DC charging according to one embodiment of the invention;
fig. 5 is a schematic diagram of connection of a dc charging mode according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating connection of a dc charging mode according to another embodiment of the present invention;
FIG. 7 is a flow chart of a method of identifying a charge-discharge pattern of a vehicle according to one embodiment of the invention;
fig. 8 is a flowchart of a method of identifying a charge-discharge pattern of a vehicle according to another embodiment of the present invention.
Reference numerals:
A charging adapter 10; a vehicle 20;
a direct current side connection port 1; an ac-side connection port 2; a vehicle-mounted alternating-current charging socket 3; the vehicle control device 4.
Detailed Description
Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.
In an embodiment, for a vehicle provided with an in-vehicle ac charging socket, when charging using an ac charging device, the in-vehicle ac socket may be directly physically connected to an ac charging gun of the ac charging device to realize an ac charging function of the vehicle.
And when the direct current charging equipment is used for charging, as the charging port arranged on the vehicle is a vehicle-mounted alternating current charging socket, and the interface of the direct current charging equipment is a direct current charging plug, the direct current charging plug is not matched with the vehicle-mounted alternating current charging socket at the vehicle-mounted end in size, and in order to realize the direct current charging function, the direct current input mode of the direct current charging equipment can be converted into the input mode of the alternating current charging port through the mode of the adapter, namely, the direct current charging equipment is correspondingly connected with the direct current charging plug and the vehicle-mounted alternating current charging socket through the adapter respectively, so that the direct current charging equipment, the vehicle-mounted alternating current charging socket and the direct current charging socket can be physically connected, a direct current power supply can be transferred into the vehicle, and then the vehicle-mounted alternating current charging equipment is charged into a battery pack through relevant processing in the vehicle, so that the direct current charging function is realized.
Based on the vehicle executing direct current charging function, the embodiment of the invention provides a charging switching device which can realize switching of direct current power supply signals, realize matching of a direct current charging interface and an alternating current charging interface, and provide support for realizing the direct current charging function for a vehicle only with the alternating current charging interface on the premise of not modifying a vehicle body die and a model.
The following describes a charge switching device provided by an embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a charging switching device 10 according to an embodiment of the present invention includes a dc side connection port 1, an ac side connection port 2, and a first resistor unit R1 and a first switch S1.
Specifically, as shown in fig. 1, the DC side connection port 1 is adapted to be connected to a DC charging device, the DC side connection port 1 includes a DC power supply positive terminal dc+, a DC power supply negative terminal DC-, a first ground terminal PE1, and a first connection control confirmation terminal CC1, and the ac side connection port 2 is adapted to be connected to an in-vehicle ac charging socket, and the ac side connection port 2 includes a first ac terminal L1, a neutral terminal N, a second ground terminal PE2, and a second connection control confirmation terminal CP.
In the embodiment, the positive terminal dc+ of the DC power supply is electrically connected to the first ac-to-DC terminal L1, and the negative terminal DC-of the DC power supply is electrically connected to the neutral terminal N, so that, when DC charging is performed, as shown in fig. 2, the DC power supply signal is transferred to the vehicle interior through the connection circuit of the positive terminal dc+ of the DC power supply to the first ac-to-DC terminal L1 and the connection circuit of the negative terminal DC-of the DC power supply to the neutral terminal N, and then is charged into the battery pack through the relevant processing in the vehicle interior, thereby realizing the DC charging function of the vehicle. Therefore, the embodiment of the invention enables the direct current charging equipment side and the vehicle side to be connected in a transferring way through the transferring function of the charging transferring device 10, thereby converting the direct current input mode of the direct current charging equipment into the input mode of the alternating current charging port, meeting the direct current charging requirement of the vehicle, and directly connecting the direct current power supply signal into the battery pack through the charging transferring device 10 without modifying the vehicle body mould and the shape, thereby realizing the direct current charging function of the vehicle, particularly for the vehicle on the market, only the distribution box and the related circuit are needed to be modified by the vehicle, the whole modification quantity of the vehicle is smaller, and the cost of the newly added direct current charging function of the vehicle is reduced.
In the embodiment, the first ground terminal PE1 is electrically connected to the second ground terminal PE2, the connection line between the first ground terminal PE1 and the second ground terminal PE2 has a first node a, the first connection control confirmation terminal CC1 is electrically connected to the second connection control confirmation terminal CP, the connection line between the first connection control confirmation terminal CC1 and the second connection control confirmation terminal CP has a second node b, and the first end of the first resistor unit R1 connected in series with the first switch S1 is connected to the first node a, and the second end of the first resistor unit R1 connected in series with the first switch S1 is connected to the second node b; the first switch S1 is a normally open switch, and when the ac side connection port 2 and the vehicle-mounted ac charging socket are in a matched connection state, the first switch S1 is switched to a closed state, so that a closed loop is formed between the first connection control confirmation terminal CC1 and the first ground terminal PE1, a resistance value between the first connection control confirmation terminal CC1 and the first ground terminal PE1 is conveniently identified by the vehicle, and a reference is provided for identifying a direct current charge-discharge mode of the vehicle.
In an embodiment, as shown in fig. 2, when in a non-power supply state, the direct current charging device interior S0 is a normally closed switch, and the first switch S1 and the vehicle interior second switch S2 are normally open switches; when the vehicle is charged and connected, the switch S0 is sprung open and then closed again, the second switch S2 is still in a normally open state, and the first switch S1 is switched to a closed state when the ac side connection port 2 and the vehicle ac charging socket are in a matched connection state, so that a closed loop is formed between the first connection control confirmation terminal CC1 and the first ground terminal PE1, and a reference is provided for identifying a dc charging and discharging mode of the vehicle. Therefore, based on the first switch S1 and the first resistor unit R1 connected in series between the first connection control confirmation terminal CC1 and the first ground terminal PE1 inside the charging switching device 10, when the dc charging is performed, that is, after the first switch S1 is switched to the closed state, the first connection control confirmation terminal CC1 forms a loop with the first ground terminal PE1 and the vehicle-mounted ac charging socket end, so that the first resistor unit R1 inside the charging switching device 10 and the resistor unit between the two ports of the vehicle-mounted ac charging socket, which are correspondingly connected to the first connection control confirmation terminal CC1 and the first ground terminal PE1, are combined together to form a total resistor, for example, R1, R2 and D1 in fig. 2 are combined to form a total resistor, so as to serve as an identification resistor when the vehicle is charged with dc, to facilitate the vehicle to confirm the dc charging mode according to the identification resistor, and provide a reference for the vehicle to perform dc charging and discharging.
According to the charging switching device 10 of the embodiment of the invention, based on the connection of the direct current side connection port 1 with the direct current charging equipment and the connection of the alternating current side connection port 2 with the vehicle-mounted alternating current charging socket, the physical connection of the vehicle side and the direct current charging equipment side is realized by the way of the transfer of the charging switching device 10, so that the direct current power supply signal of the direct current charging equipment is switched into the vehicle through the charging switching device to realize the direct current charging function of the vehicle, and the first resistor unit R1 arranged between the connection loop of the first connection control confirmation terminal CC1 and the grounding terminal PE1 is used as the identification resistor, so that the vehicle can confirm the direct current charging mode according to the identification resistor, the matching of the charging and discharging functions of the vehicle is facilitated, and the reference is provided for the direct current charging and discharging control of the vehicle.
In some embodiments, as shown in fig. 1, the dc side connection port 1 further includes a first communication terminal s+, a second communication terminal S-, a first connection confirmation terminal CC2, a first auxiliary power terminal a+ and a second auxiliary power terminal a-, and the ac side connection port 2 further includes a second phase ac terminal L2, a third phase ac terminal L3, a second connection confirmation terminal CC. The first communication terminal s+ is electrically connected to the second phase ac terminal L2, and the second communication terminal S-is electrically connected to the third phase ac terminal L3. And, based on the arrangement form of each port in the dc plug of the dc charging device, the charging switching device 10 according to the embodiment of the present invention is configured to implement the matching connection between the dc side connection port 1 and the dc plug, so that the first connection confirmation terminal CC2, the first auxiliary power terminal a+ and the second auxiliary power terminal a-are disposed at the dc side connection port 1, and the embodiment of the present invention is configured to implement the matching connection between the ac side connection port 2 and the vehicle ac charging socket, and the second connection confirmation terminal CC is disposed at the ac side connection port 2, and meanwhile, in the embodiment of the present invention, it is considered that there is no actual signal or current transmission between the first connection confirmation terminal CC2, the second connection confirmation terminal CC, the first auxiliary power terminal a+ and the second auxiliary power terminal a-and other ports are all in an empty state in the charging switching device 10.
The second aspect of the present invention provides a vehicle, as shown in fig. 2, the vehicle 20 of the embodiment of the present invention includes an on-vehicle alternating-current charging receptacle 3, a second resistance unit R2, a third resistance unit R3, and a second switch S2, and a vehicle control device 4.
In the embodiment, as shown in fig. 3, based on the vehicle-mounted ac charging receptacle 3 provided for the vehicle 20, when charging using the ac charging apparatus, the vehicle-mounted ac charging receptacle 3 may be directly connected in a matching manner with the ac plug of the ac charging apparatus, so as to realize the ac charging function of the vehicle.
As shown in fig. 2, the vehicle-mounted ac charging socket 3 in the embodiment of the present invention is also suitable for being connected with the charging adapter device 10 provided in the foregoing embodiment in a matching manner, so that the vehicle side and the dc charging device side are physically connected by adopting the transfer manner of the charging adapter device 20, the charging adapter device 20 includes a dc side connection port 1 and an ac side connection port 2, the dc side connection port 1 is connected with a dc plug in a matching manner, and the ac side connection port 2 is connected with the vehicle-mounted ac charging socket 3 in a matching manner, so that the dc plug is indirectly connected with the vehicle-mounted ac charging socket 3, thereby realizing the dc charging function of the vehicle.
Therefore, the embodiment of the invention can select two charging modes of direct current charging and alternating current charging according to the requirement based on the same charging port of the vehicle 20 with the vehicle-mounted alternating current charging socket 3, so that for the vehicle which is not on the market, only the vehicle-mounted alternating current charging socket can be configured without modifying a vehicle body mould and a model, the cost is low, and for the vehicle which is on the market, only a distribution box and related circuits are needed to be added to the vehicle, the overall change amount of the vehicle is small, and the cost of the newly added direct current charging function of the vehicle is reduced.
And, in the embodiment of the present invention, the in-vehicle alternating-current charging receptacle 3 includes the third ground terminal PE, the third connection confirmation terminal CC, and the third connection control confirmation terminal CP; the first end of the second resistor unit R2 is respectively connected with the third ground terminal PE and the vehicle body ground, the second end of the second resistor unit R2 is connected with the third connection control confirmation terminal CP through the diode D1, the first end of the third resistor unit R3 connected in series with the second switch S2 is respectively connected with the third ground terminal PE and the vehicle body ground, the second end of the third resistor unit R3 connected in series with the second switch S2 is connected with the second end of the second resistor unit R2, and the second switch S2 is a normally open switch; the first detection end of the vehicle control device 4 is connected to the third connection confirmation terminal CC, a first detection point c is provided between the first detection end and the third connection confirmation terminal CC, the second detection end of the vehicle control device 4 is connected to a connection line between the second end of the second resistor unit R2 and the diode D1, and the connection point is used as a second detection point D, and the vehicle control device 4 is configured to identify a charge-discharge mode according to a resistance value between the first detection point c and the third ground terminal PE.
In the embodiment, since the vehicle is charged, two charging modes of the direct current charging device and the alternating current charging device can be selected, and different charging strategies are required for the vehicle in terms of the direct current charging mode and the alternating current charging mode, therefore, the vehicle 20 in the embodiment of the invention adopts a mode of detecting resistance, sets different resistance values to match different charging and discharging modes to judge the charging and discharging mode of the vehicle, namely, the vehicle control device 4 acquires the resistance value between the first detection point c and the third grounding end PE in the charging and connecting process, and matches the detected resistance value with the corresponding charging and discharging mode, thereby determining that the vehicle is in the alternating current mode or the direct current mode, realizing the function of identifying the charging and discharging modes of the vehicle, facilitating the matching of the charging and discharging functions of the vehicle, and providing reference for the vehicle to perform direct current or alternating current charging and discharging control.
The following illustrates a process of identifying charge and discharge of a vehicle according to an embodiment of the present invention.
In some embodiments, when identifying the charge-discharge mode, the vehicle control device 4 is configured to determine that the charge-discharge mode is the ac charge-discharge mode when detecting that the resistance value between the first detection point c and the third ground terminal PE is the ac charge standard resistance value, or determine that the charge-discharge mode is the dc charge-discharge mode when detecting that the resistance value between the first detection point c and the third ground terminal PE is the dc charge standard resistance value.
In an embodiment, based on the vehicle-mounted ac charging socket 3 set on the vehicle 20, when the ac charging device is used for charging, the vehicle-mounted ac charging socket 3 may be directly and physically connected with an ac plug of the ac charging device to implement an ac charging function of the vehicle, for example, fig. 3 is a schematic diagram of charging connection between the vehicle and the ac charging device, where a terminal of the vehicle-mounted terminal and a terminal of the charging device are in butt joint: the first alternating current power supply signal output terminal L1 of the charging equipment end is in butt joint with the first power supply signal input terminal L1 of the vehicle-mounted end, the first standby terminal L2 of the charging equipment end is in butt joint with the first standby terminal L2 of the vehicle-mounted end, the second standby terminal L3 of the charging equipment end is in butt joint with the second standby terminal L3 of the vehicle-mounted end, the second alternating current power supply signal output terminal N of the charging equipment end is in butt joint with the second power supply signal output terminal N of the vehicle-mounted end, the grounding terminal PE of the charging equipment end is in butt joint with the third grounding terminal PE of the vehicle-mounted end, the charging connection confirmation terminal CC of the charging equipment end is in butt joint with the third connection confirmation terminal CC of the vehicle-mounted end, and the charging control terminal CP of the charging equipment end is in butt joint with the third connection control confirmation terminal CP of the vehicle-mounted end. Thus, the alternating current power supply signal is charged into the battery pack through the alternating current plug and the vehicle-mounted alternating current charging socket 3, and the alternating current charging function of the vehicle is realized. And, in this connection state, the resistance value between the first detection point c and the third ground terminal PE connection loop is taken as the identification resistance, for example, as shown in fig. 3, based on the resistance R4, the resistance Rc, and the normally closed switch S3 provided between the internal connection terminal PE and the charge connection confirmation terminal CC in the ac charging device, after the ac plug is connected to the vehicle-mounted ac charging socket 3, the vehicle control device 4 detects that the resistance value between the first detection point c and the third ground terminal PE is the sum of the resistance Rc and the second resistance unit R2, and can determine that this charge/discharge mode is the ac charging mode.
In an embodiment, the vehicle may store the correspondence between different charge and discharge modes and different resistance values in advance, as shown in table 1, where different charge and discharge modes are set in the vehicle for ac charging devices of different specifications, that is, different resistance values correspond to different rated currents, so when the vehicle is charging, the charge and discharge mode of the charging can be determined according to the detected resistance values according to the correspondence set in table 1, thereby realizing the function of identifying the charge and discharge modes of the vehicle, and facilitating the adjustment of the charging strategy of the vehicle.
Table 1 ac charging mode and resistance value
Figure BDA0002564180190000091
In the embodiment, as shown in table 1, regarding the correspondence between the vehicle charge-discharge mode and the resistance value, the accuracy of the resistance value detected by the vehicle is ±3%, where the magnitude of the resistance value may be modified or set according to the actual situation, which is not limited.
And, during dc charging, the charging switching device 10 provided based on the above embodiment realizes the transfer connection between the vehicle-mounted ac charging socket 3 and the dc charging device, as shown in fig. 2, a resistor R0' is disposed between the internal ground terminal PE of the dc charging device and the connection confirmation terminal CC2, but since the first connection confirmation terminal CC2 in the charging switching device 10 is in a vacant state, the vehicle control device 4 obtains the resistance value between the first detection point c and the third ground terminal PE through the connection loop of the third connection control confirmation terminal CP during dc charging, unlike the manner of identifying the ac charging mode; and, based on the resistor R0 and the normally closed switch S0 being provided between the internal ground terminal PE of the dc charging device and the connection control confirmation terminal CC1, and the first resistor unit R1 and the first switch S1 being provided between the internal second ground terminal PE2 of the charging switching device 10 and the second connection control confirmation terminal CP, in the charging connection, the resistor R0 inside the dc charging device is connected in parallel with the first resistor unit R1, and the first resistor unit R1, the second resistor unit R2 inside the vehicle and the diode D1 are combined to form a total resistor as an identification resistor, so that the vehicle control device 4 confirms that the current charging/discharging mode is the dc charging mode by acquiring the resistance value between the first detection point c and the third ground terminal PE. For example, fig. 4 shows a timing chart of the voltages at the detection points d and e and the states of the switches S1, S2, S0 when the charging switching device 10 is used to realize dc charging, and in the unconnected state, the switch S0 is in the closed state, and the switches S1 and S2 are in the open state; when the charging connection is confirmed, the switch S0 is sprung open and then closed again, the switch S2 is still in a normally open state, and the switch S1 is kept in a closed state after the charging switching device 10 is ensured to be inserted into the vehicle-mounted alternating current charging socket 3 until the charging is completed.
It should be noted that fig. 2 and fig. 3 are only examples of charging connection according to an embodiment of the present invention, and the two charging modes according to the embodiment of the present invention are connected by the same port, but are not limited to the connection manner of the docking port.
Therefore, according to the vehicle 20 of the embodiment of the present invention, the vehicle-mounted ac charging socket 3 can be connected with the charging switching device 10 provided in the above embodiment in a matching manner, so that the vehicle 20 can be directly connected with the ac charging device to realize the ac charging function, and can be indirectly connected with the dc charging device to realize the dc charging function, and the vehicle body mold and the model do not need to be modified, so as to reduce the cost.
In an embodiment, the vehicle 20 of an embodiment of the present invention includes a hybrid vehicle, a pure electric vehicle, a fuel cell vehicle, and the like.
In the embodiment, when the direct current charging equipment is used for charging, the direct current charging can be performed only by adopting the charging switching device 10 for transfer, in the process, the charging switching device 10 is connected with the vehicle-mounted alternating current charging socket 3 or the direct current charging gun firstly, and in the embodiment of the invention, the voltage value between the first detection point c acquired by the vehicle and the vehicle body PE can also change along with the difference of two connection sequences due to the difference of acquired resistance values under the two connection working conditions.
The change in the resistance value when the connection order of the charge switching device 10 is different in the direct current mode will be described in detail with reference to the accompanying drawings.
In some embodiments, when the vehicle control device 4 identifies the charging and discharging mode, the vehicle control device is further configured to determine that the dc charging apparatus and the charging adapter device 10 are connected to the vehicle ac charging socket 3 when detecting that the voltage value between the first detection point c and the vehicle body ground PE is pulled up from the zero value to the dc charging standard voltage value. For example, as shown in fig. 5, the charging switching device 10 may be connected to the vehicle ac charging socket 3 first and then connected to the dc plug, in this connection process, when the charging switching device 10 is not connected to the vehicle ac charging socket 3, the second detection end of the vehicle control device 4 recognizes that the voltage value between the second detection point d and the third ground terminal PE is 0V and still detects 0V after connection, further, after the charging switching device 10 is connected to the dc plug, the second detection end of the vehicle control device 4 recognizes that the voltage value between the first detection point c and the vehicle body ground PE is pulled up from 0V to 4V, and thus the vehicle control device 4 recognizes that the connection between the dc charging device and the charging switching device 10 and the vehicle ac charging socket 3 is completed, and at this time, the voltage change of the detection point e in the dc charging device is as shown in fig. 4, the voltage of the detection point e is 6V when the connection is not completed, the normally closed switch S0 is instantaneously opened and returns to 6V after the connection is closed again until the connection control terminal CP is turned on to 4V after the connection is completed.
In some embodiments, as shown in fig. 6, the charging adapter apparatus 10 may also be connected to the dc plug first and then to the vehicle ac charging socket 3. In this connection process, when the ac charging device 10 is not connected to the dc plug, as shown in fig. 4, the voltage at the detection point e in the dc charging apparatus is 6V, since S1 is a normally open switch and S0 is a normally closed switch, after the charging adapter 10 is plugged in, the S0 switch is opened to raise the voltage to 12V, and after the S0 is reclosed, the voltage at the detection point e is pulled down to 6V again, and when the dc plug is plugged into the vehicle-mounted ac charging socket 3 together with the charging adapter 10, the connection control confirmation terminal CP is turned on, so that the voltage at the detection point e is pulled down to 4V, that is, the voltage between the first detection point c and the vehicle body ground PE is detected as 4V by the vehicle control device 4, it can be determined that the connection between the dc charging apparatus and the charging adapter 10 and the vehicle-mounted ac charging socket 3 is completed, and in this process, the vehicle-mounted control device 4 will not detect the change of the voltage value.
In some embodiments, when the vehicle control device 4 recognizes the charging mode, it is determined that the ac plug and the vehicle-mounted ac charging socket 3 are in the semi-connected state when detecting that the resistance value between the first detection point c and the third ground terminal PE is the ac charging standard resistance value. For example, as shown in fig. 3, when the vehicle is ac charged, in a state where the ac plug is half-connected to the in-vehicle ac charging socket 3, the vehicle control device 4 detects that the resistance value between the first detection point c and the third ground terminal PE is r3+rc, that is, the ac charging standard resistance value. As shown in table 1, the ac charging modes of different rated currents have different resistance values, and the vehicle control device 4 adopts a corresponding charging control strategy based on the detected resistance values.
An embodiment of a third aspect of the present invention provides a method for identifying a charge-discharge mode of a vehicle, which is used for the vehicle provided in the foregoing embodiment, as shown in fig. 7, and the method of the embodiment of the present invention includes steps S1-S2.
Step S1, a resistance value between a first detection point and a third grounding end is obtained.
The vehicle at least comprises a vehicle-mounted alternating-current charging socket, a second resistor unit and a vehicle control device, as shown in fig. 2 or 3, a first detection end of the vehicle control device is connected with a third connection confirmation terminal, a first detection point is arranged between the first detection end and the third connection confirmation terminal, a second detection end of the vehicle control device is connected to a connection line between the second end of the second resistor unit and a diode, and the connection point is used as a second detection point.
In the embodiment, in order to match two charging modes of the vehicle, the method of the embodiment of the invention adopts a mode of detecting resistance to judge the charging mode, specifically, when the vehicle is charged, after the charging power supply is confirmed to be connected through the third connection confirmation terminal, the vehicle control device detects the resistance value between the first detection point and the third grounding end, and then step S2 is executed. The charging power supply comprises a direct current charging device and an alternating current charging device.
Step S2, a charge-discharge mode is identified according to the resistance value between the first detection point and the third grounding end.
In the embodiment, since the vehicle is charged, two charging modes of the direct current charging equipment and the alternating current charging equipment can be selected, and different charging strategies are needed for the vehicle in terms of the direct current charging and the alternating current charging, the method of the embodiment of the invention adopts a detection resistance mode to judge the current charging and discharging mode of the vehicle, namely, the change of the resistance value between the first detection point and the third grounding end is detected in the charging and connecting process, and the vehicle is conveniently determined to be in an alternating current mode or a direct current mode according to the obtained resistance value matching the corresponding charging and discharging mode, so that the function of identifying the charging and discharging mode of the vehicle is realized, the matching of the charging and discharging functions of the vehicle is facilitated, and references are provided for the vehicle to perform direct current or alternating current charging and discharging control.
For example, as shown in fig. 2, a connection schematic diagram of a vehicle during dc charging is shown, wherein during charging connection, a first resistor unit in the charging switching device, a second resistor unit in the vehicle and a diode are combined to form a total resistor, which is used as an identification resistor during dc charging of the vehicle, so that the vehicle control device confirms that the charging mode is the dc charging mode by acquiring a resistor value between the first detection point and the third ground terminal. And fig. 3 is a schematic connection diagram of a vehicle for dc charging, wherein, when the vehicle is charged, a resistance value between the first detection point and the third ground connection loop is used as an identification resistance, that is, when the vehicle control device detects that the resistance value between the first detection point and the third ground is the sum of the resistance Rc and the second resistance unit inside the ac charging device, the charging mode is determined to be the ac charging mode.
In an embodiment, in the method of the embodiment of the present invention, when the vehicle is in a discharging state, a resistance value between the first detection point and the third ground terminal is obtained by the vehicle control device during a discharging connection process, and then a discharging mode is confirmed according to the detected resistance value, for example, a resistance identification unit is set in an electric load, and when an ac discharging connection is performed, if the detected resistance value is a sum of resistance values of the resistance identification unit and the second resistance unit, the charging and discharging mode is determined to be an ac mode; or when the direct current discharging connection is carried out, the physical connection is needed to be realized through the charging switching device, and the charging and discharging mode is determined to be the direct current mode by acquiring the resistance value between the first detection point and the third grounding end, so that the function of identifying the charging and discharging mode by the vehicle during discharging is realized.
According to the method for identifying the vehicle charge-discharge mode, the resistance value between the first detection point and the third grounding end, which is obtained by the vehicle control device, is detected in a resistance detection mode, the charge-discharge mode is identified according to the detected resistance value, the matching of the charge-discharge function of the vehicle is facilitated, and references are provided for the direct current or alternating current charge-discharge control of the vehicle.
In some embodiments, for identifying the charge-discharge mode according to the resistance value between the first detection point and the third ground terminal, including determining that the charge-discharge mode is an ac charge-discharge mode if the resistance value between the first detection point and the third ground terminal is detected as an ac charge standard resistance value; or, if the resistance value between the first detection point and the third grounding end is detected to be the direct current charging standard resistance value, determining that the charging and discharging mode is a direct current charging and discharging mode.
In some embodiments, in the direct current charge-discharge mode, in a connection loop where the first detection point and the third ground terminal are located, a total resistance of a resistance of the first resistance unit of the charge switching device, a resistance of the second resistance unit of the vehicle, and a resistance of the diode is the resistance between the first detection point and the third ground terminal. For example, as shown in fig. 2, the resistor R0 inside the dc charging device is connected in parallel with the first resistor unit R1, and the first resistor unit R1, the second resistor unit R2 inside the vehicle, and the diode D1 are combined to form a total resistor as an identification resistor, so that the vehicle control device confirms that the current charge/discharge mode is the dc charging mode by acquiring the resistance value between the first detection point c and the third ground terminal PE.
In some embodiments, the method of the embodiment of the present invention further includes determining that the dc charging device and the charging adapter are connected to the vehicle-mounted ac charging socket when it is detected that the voltage value between the second detection point and the vehicle body ground is pulled up from the zero value to the dc charging standard voltage value. For example, as shown in fig. 5, the charging switching device may be connected to the vehicle-mounted ac charging socket first and then connected to the dc plug, in this connection process, when the charging switching device is not connected to the vehicle-mounted ac charging socket, the second detection end of the vehicle control device recognizes that the voltage value between the second detection point and the third ground terminal is 0V, and still detects that the voltage value is 0V after connection, further, when the charging switching device is connected to the dc plug, the second detection end of the vehicle control device recognizes that the voltage value between the first detection point c and the vehicle body ground PE is pulled up from 0V to 4V, and thus the vehicle-mounted control device recognizes that the connection between the dc charging device and the charging switching device and the vehicle-mounted ac charging socket is completed, and when the voltage change of the detection point e in the dc charging device is as shown in fig. 4, the voltage of the detection point e is 6V when the connection is not completed, the normally closed switch S0 is opened and is instantaneously 12V, and after S0 is reclosed, the voltage value of the connection control confirmation terminal CP is pulled down to 4V.
In some embodiments, as shown in fig. 6, the charging adapter device may also be connected to the dc plug first and then to the vehicle ac charging outlet. In the connection process, when the ac charging device is not connected to the dc plug, the voltage at the detection point e in the dc charging device is 6V, because S1 is a normally open switch and S0 is a normally closed switch, after the charging switching device is inserted, the S0 switch is opened to raise the voltage to 12V, and after the S0 is reclosed, the voltage at the detection point e is lowered to 6V again, and when the dc plug and the charging switching device are plugged into the vehicle-mounted ac charging socket together, the connection control confirmation terminal CP is turned on, so that the voltage value at the detection point e is lowered to 4V, that is, the voltage value between the first detection point c and the vehicle body ground PE is detected by the vehicle control device to be 4V, it can be determined that the connection of the dc charging device and the charging switching device to the vehicle-mounted ac charging socket is completed, and in the process, the vehicle-mounted control device will not detect the change of the voltage value.
In some embodiments, for identifying the charging mode according to the resistance value between the first detection point and the third ground, further comprising determining that the charging mode is an ac charging mode if the resistance value between the first detection point and the third ground is detected as an ac charging standard resistance value. As shown in fig. 3, when the vehicle is ac charged, the vehicle control device detects that the resistance value between the first detection point and the third ground terminal is r3+rc in the half-connected state of the ac plug and the in-vehicle ac charging receptacle. As shown in table 1, the ac charging at different rated currents has different resistance values, and the vehicle control device 4 adopts a corresponding charging control strategy based on the detected resistance values.
A method for identifying a charging mode of a vehicle according to an embodiment of the present invention is illustrated in the following with reference to fig. 8.
For the direct current charging mode, the process of vehicle identification is as follows.
In step S3, the vehicle control device detects that the voltage value between the second detection point d and the third ground terminal PE is 0.
In step S4, if the vehicle control device confirms that the charging electric port cover is open, the vehicle should be placed in a non-drivable state.
In step S5, the vehicle control device detects that the second detection point d is pulled up from 0V to 4V between the first detection point c and the vehicle body ground PE.
In step S6, the vehicle control device recognizes that the "dc plug+charge switching device" is inserted.
Step S7, starting a direct current charging strategy.
For the ac charging mode, the identification process of the vehicle is as follows.
In step S8, the vehicle control device detects that the resistance value of the first detection point is 3.52kΩ or 3.40kΩ or 3.38kΩ or 3.3kΩ.
In step S9, the vehicle control device recognizes that the ac plug is inserted.
Step S10, an ac charging strategy is started.
Therefore, according to the vehicle according to the embodiment of the present invention, based on the charging switching device provided in the foregoing embodiment, the vehicle-mounted ac charging socket may be directly connected to the ac charging device to implement the ac charging function, or may be indirectly connected to the dc charging device to implement the dc charging function, without modifying the vehicle body mold and the shape, so as to reduce the cost.
In the description of this specification, any process or method description in a flowchart or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing logical functions or steps of the process, and in which the scope of the preferred embodiments of the present invention include additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A charging adapter, comprising:
the direct-current side connection port is suitable for being connected with direct-current charging equipment and comprises a direct-current power supply positive terminal, a direct-current power supply negative terminal, a first grounding terminal and a first connection control confirmation terminal;
an ac side connection port adapted to be connected with a vehicle-mounted ac charging receptacle, the ac side connection port including a first ac-to-ac terminal, a neutral terminal, a second ground terminal, and a second connection control confirmation terminal;
the positive terminal of the direct current power supply is electrically connected with the first alternating current terminal, the negative terminal of the direct current power supply is electrically connected with the neutral line terminal, the first grounding terminal is electrically connected with the second grounding terminal, a first node is arranged on a connecting line of the first grounding terminal and the second grounding terminal, the first connection control confirmation terminal is electrically connected with the second connection control confirmation terminal, and a second node is arranged on a connecting line of the first connection control confirmation terminal and the second connection control confirmation terminal;
the first end of the first resistor unit connected in series with the first switch is connected with the first node, and the second end of the first resistor unit connected in series with the first switch is connected with the second node;
The first switch is a normally open switch, and is switched to a closed state when the alternating-current side connecting port and the vehicle-mounted alternating-current charging socket are in a matched connection state.
2. The charge switching device according to claim 1, wherein,
the direct current side connection port further comprises a first communication terminal, a second communication terminal, a first connection confirmation terminal, a first auxiliary power terminal and a second auxiliary power terminal;
the alternating current side connection port further comprises a second phase alternating current terminal, a third phase alternating current terminal and a second connection confirmation terminal;
the first communication terminal is electrically connected with the second phase alternating current terminal, the second communication terminal is electrically connected with the third phase alternating current terminal, and the first connection confirmation terminal, the second connection confirmation terminal, the first auxiliary power terminal and the second auxiliary power terminal are empty.
3. A vehicle, characterized by comprising:
an in-vehicle ac charging receptacle adapted for mating connection with the charging adapter of claim 1 or 2, the in-vehicle ac charging receptacle including a third ground terminal, a third connection confirmation terminal, and a third connection control confirmation terminal;
The first end of the second resistor unit is connected with the third grounding terminal and the vehicle body ground respectively, and the second end of the second resistor unit is connected with the third connection control confirmation terminal through a diode;
the first end of the third resistor unit, which is connected with the second switch in series, is respectively connected with the third grounding terminal and the vehicle body ground, the second end of the third resistor unit, which is connected with the second switch in series, is connected with the second end of the second resistor unit, and the second switch is a normally open switch;
the first detection end of the vehicle control device is connected with the third connection confirmation terminal, a first detection point is arranged between the first detection end and the third connection confirmation terminal, the second detection end of the vehicle control device is connected to a connecting line of the second end of the second resistance unit and the diode, and the connecting point is used as a second detection point and used for identifying a charge-discharge mode according to the resistance value between the first detection point and the third grounding end.
4. The vehicle according to claim 3, wherein the vehicle control device is configured to determine that the charge/discharge mode is an ac charge/discharge mode when detecting that a resistance value between the first detection point and the third ground terminal is an ac charge standard resistance value, or determine that the charge/discharge mode is a dc charge/discharge mode when detecting that a resistance value between the first detection point and the third ground terminal is a dc charge standard resistance value, when recognizing the charge/discharge mode.
5. The vehicle according to claim 4, wherein in the direct current charge/discharge mode, a total resistance of a resistance of the first resistance unit of the charge switching device, a resistance of the second resistance unit of the vehicle, and a resistance of the diode is a resistance between the first detection point and the third ground in a connection loop where the first detection point and the third ground are located.
6. The vehicle of claim 5, wherein the vehicle control device is further configured to determine that the direct current charging device and the charging adapter device are connected to the vehicle-mounted ac charging outlet when the vehicle control device recognizes the charging and discharging mode and detects that the voltage value between the second detection point and the vehicle body ground increases from a zero value to a direct current charging standard voltage value.
7. A method of identifying a charge-discharge pattern of a vehicle for use with the vehicle of claim 3, the method comprising:
acquiring a resistance value between a first detection point and a third grounding end;
and identifying a charge-discharge mode according to the resistance value between the first detection point and the third grounding end.
8. The method of identifying a charge-discharge pattern of a vehicle according to claim 7, characterized in that identifying a charge-discharge pattern based on a resistance value between the first detection point and the third ground terminal includes:
When the resistance value between the first detection point and the third grounding end is detected to be an alternating current charging standard resistance value, determining that the charging and discharging mode is an alternating current charging and discharging mode;
or, if the resistance value between the first detection point and the third grounding end is detected to be the direct-current charging standard resistance value, determining that the charging and discharging mode is a direct-current charging and discharging mode.
9. The method according to claim 8, wherein, in the direct current charge/discharge mode, a total resistance of the first resistance unit of the charge switching device, the second resistance unit of the vehicle, and the resistance of the diode is a resistance between the first detection point and the third ground in a connection loop where the first detection point and the third ground are located.
10. The method of identifying a vehicle charge-discharge pattern of claim 9, further comprising:
and if the voltage value between the second detection point and the ground of the vehicle body is detected to be increased from a zero value to a direct-current charging standard voltage value, determining that the direct-current charging equipment and the charging switching device are connected with the vehicle-mounted alternating-current charging socket.
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