CN113859003B - Vehicle-mounted charger, method for controlling direct-current charging of vehicle, charging adapter and vehicle - Google Patents

Vehicle-mounted charger, method for controlling direct-current charging of vehicle, charging adapter and vehicle Download PDF

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Publication number
CN113859003B
CN113859003B CN202010617197.9A CN202010617197A CN113859003B CN 113859003 B CN113859003 B CN 113859003B CN 202010617197 A CN202010617197 A CN 202010617197A CN 113859003 B CN113859003 B CN 113859003B
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China
Prior art keywords
charging
vehicle
direct current
direct
current
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CN202010617197.9A
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CN113859003A (en
Inventor
黄志祥
罗建兴
石雷
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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
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a vehicle-mounted charger, a method for controlling direct current charging of a vehicle, a charging adapter and the vehicle, wherein the vehicle-mounted charger comprises an AC/DC module, a DC/DC module and a control module; the control module is used for detecting direct current, controlling the AC/DC module to be conducted so as to transmit the direct current, and controlling the DC/DC module to convert the direct current into direct current required by the vehicle-mounted battery. The vehicle-mounted charger can realize a direct-current charging function and improve conversion efficiency.

Description

Vehicle-mounted charger, method for controlling direct-current charging of vehicle, charging adapter and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle-mounted charger, a method for controlling direct current charging of a vehicle, a charging adapter and the vehicle.
Background
With the vigorous development of new energy automobiles and new energy facility industries, subsidies gradually trend to charge operation facility enterprises, particularly governments and social resources in various places develop public charging, the increment of direct current charging stations is obvious, the convenience of direct current charging is increasingly obvious, but many hybrid vehicles only use alternating current charging ports and can charge vehicles only through alternating current jacks or alternating current charging stations and the like, the alternating current charging stations are mainly unattended parking areas, and phenomena such as occupation of oil vehicles, damage of alternating current piles and the like frequently occur, so that the hybrid vehicles are more difficult to charge on the public charging stations.
In order to solve the problem that the hybrid electric vehicle charges on the direct current pile, even manufacturers develop direct current-to-alternating current charging control equipment, namely, direct current of the direct current charging pile is converted into alternating current, and then the vehicle is powered. But this charge control equipment itself is power equipment, and product itself is heavy difficult to carry, and the cost is higher to see on whole charging circuit, from electric wire netting end to battery end, through the triple loss of charging stake, charge control equipment, on-vehicle machine that charges, conversion efficiency is also lower, and user experience degree is not high.
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 vehicle-mounted charger, which can realize a dc charging function and improve conversion efficiency.
The second objective of the present invention is to provide a method for controlling the direct current charging of a vehicle.
A third object of the present invention is to provide a vehicle.
The fourth objective of the present invention is to provide a charging adapter.
In order to solve the above problems, an embodiment of the first aspect of the present invention provides a vehicle-mounted charger, including an AC/DC module, a DC/DC module, and a control module; the control module is used for detecting direct current, controlling the AC/DC module to be conducted so as to transmit the direct current, and controlling the DC/DC module to convert the direct current into direct current required by the vehicle-mounted battery.
According to the vehicle-mounted charger provided by the embodiment of the invention, the vehicle-mounted alternating current socket is matched with the charging adapter, when direct current charging is carried out, the control module detects direct current, and then the AC/DC module is controlled to be conducted so as to transmit the direct current, and the direct current is converted into direct current required by the vehicle-mounted battery through the DC/DC module, so that the direct current charging is completed.
In some embodiments, the control module is further configured to detect a dc charging identification signal, determine that a charging adapter is connected, and feed back a vehicle-mounted charging permission signal to the charging adapter when it is determined that the vehicle meets a dc charging condition.
An embodiment of the second aspect of the present invention provides a method for controlling direct current charging of a vehicle, for a vehicle-mounted charger, including detecting direct current; controlling the conduction of an AC/DC module of the vehicle-mounted charger to transmit direct current; and controlling a DC/DC module of the vehicle-mounted charger to convert the direct current into direct current required by a vehicle-mounted battery so as to charge the vehicle-mounted battery.
According to the method for controlling the direct current charging of the vehicle, the vehicle-mounted alternating current socket is matched with the charging adapter, when the direct current charging is carried out, the direct current is detected through the control module, the AC/DC module is further controlled to be conducted so as to transmit the direct current, the direct current is converted into the direct current required by the vehicle-mounted battery through the DC/DC module, and the direct current charging is completed.
In some embodiments, prior to detecting the direct current, the method further comprises: when the direct-current charging identification signal is detected, determining that the direct-current charging adapter is connected; after the direct-current charging adapter is determined to be connected, determining whether a vehicle meets a direct-current charging condition or not; and the vehicle meets the direct-current charging condition, and feeds back a vehicle-mounted charging permission signal to the charging adapter.
An embodiment of a third aspect of the present invention provides a vehicle including a vehicle-mounted battery and a vehicle-mounted ac outlet; the vehicle-mounted charger of the embodiment is connected with the vehicle-mounted alternating current socket and is used for carrying out direct current charging on the battery.
According to the vehicle provided by the embodiment of the invention, when the vehicle is charged by direct current, the vehicle-mounted alternating current socket is connected with the charging adapter in a matched manner, a direct current power supply signal enters the vehicle-mounted charger through the charging adapter and the vehicle-mounted alternating current socket, the input power of the charging pile is regulated and controlled through the vehicle-mounted charger, the direct current charging of the battery is completed, the direct current charging function of the vehicle is realized, the charging adapter is not required to perform power conversion, and the conversion efficiency is improved.
An embodiment of a fourth aspect of the present invention provides a charging adapter, for connecting with the vehicle described in the above embodiment during dc charging, where the charging adapter includes a dc charging stand, including a first power input port for inputting positive dc power and a second power input port for inputting negative dc power; an alternating current charging head comprising a first power output port for outputting the positive direct current and a second power output port for outputting the negative direct current; the first end of the first switch unit is connected with the first power input port, and the second end of the first switch unit is connected with the first power output port; the first end of the second switch unit is connected with the second power input port, and the second end of the second switch unit is connected with the second power output port; and the control board is respectively connected with the first switch unit and the second switch unit and is used for responding to the vehicle-mounted charging permission signal and controlling the first switch unit and the second switch unit to be closed.
According to the charging adapter provided by the embodiment of the invention, when direct current charging is carried out, based on the connection of the direct current charging seat and the direct current power supply and the connection of the alternating current charging head and the vehicle-mounted alternating current socket, the control board controls the first switch unit and the second switch unit to be closed in response to the vehicle-mounted charging permission signal sent by the vehicle-mounted end, and direct current input by the direct current power supply end can enter the vehicle-mounted end through the power input port and the power output port to complete the direct current charging process.
In some embodiments, the dc cradle further comprises: the first charging communication port and the second charging communication port are connected with the control board and used for carrying out direct-current charging message interaction with the direct-current charging pile; and the control board is also used for sending a charging adjustment instruction to the direct-current charging pile when the output direct current of the direct-current charging pile is determined to exceed the vehicle-mounted charging allowable range according to the direct-current charging message.
In some embodiments, the dc cradle further comprises: the first charging connection port and the second charging connection port are connected with the control board and are used for inputting direct-current charging connection signals; the control panel is provided with a charging mode identification unit, and the charging mode identification unit generates a direct-current charging identification signal based on the direct-current charging connection signal.
In some embodiments, the ac charging head further comprises: the first connection detection port and the second connection detection port are connected with the control board and used for outputting the direct current charging identification signal to the vehicle-mounted charger.
In some embodiments, the dc cradle further comprises: the first standby port and the second standby port are connected with the control board.
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 diagram of DC charging an electric vehicle according to one embodiment of the invention;
FIG. 2 is a block diagram of a vehicle-mounted charger according to one embodiment of the present invention;
FIGS. 3 (a) - (c) are schematic diagrams illustrating the change in DC voltage values after the DC voltage is input to the vehicle according to one embodiment of the present invention;
FIG. 4 is a flow chart of a method of controlling DC charging of a vehicle according to one embodiment of the invention;
fig. 5 is a schematic structural view of a charging adapter according to an embodiment of the present invention;
FIG. 6 is a block diagram of a vehicle according to one embodiment of the invention;
fig. 7 is a flow chart of charging a vehicle by a dc charging stake according to one embodiment of the invention.
Reference numerals:
a vehicle-mounted charger 10; an AC/DC module 1; a DC/DC module 2; a control module 3;
a charging adapter 20; a DC charging stand 4; an ac charging head 5; a control board 6;
a vehicle 30; a vehicle-mounted alternating current socket 7; and an in-vehicle battery 8.
Detailed Description
Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.
In the embodiment, a dc charging process of an electric vehicle will be described with reference to fig. 1, and as shown in fig. 1, a dc charging socket of a charging adapter is connected to a dc plug of a dc charging device, and an ac charging head of the charging adapter is connected to an on-vehicle ac socket of the electric vehicle when dc charging is performed. When the whole charging loop is seen, direct current output by the direct current charging equipment enters the electric vehicle through the charging adapter, and then the direct current enters the electric vehicle through relevant processing of a vehicle-mounted charger in the vehicle, so that the function of charging the battery pack by the direct current power supply is realized. Compared with the existing charging control equipment, the charging adapter of the embodiment of the invention does not have the function of direct current to alternating current, and only needs to communicate with a direct current charging pile and a vehicle.
The following describes a vehicle-mounted charger according to an embodiment of the present invention, which can realize a dc charging function and improve conversion efficiency.
Fig. 2 is a block diagram of a vehicle-mounted charger according to an embodiment of the first aspect of the present invention, and as shown in fig. 2, a vehicle-mounted charger 10 according to an embodiment of the present invention includes an AC/DC module 1, a DC/DC module 2, and a control module 3.
In an embodiment, the control module 3 is configured to control the AC/DC module 1 to rectify to output DC power when detecting AC power, and control the DC/DC module 2 to convert the DC power into DC power required by the vehicle battery. That is, the AC/DC module 1 may control the AC power input/output, thereby playing a role of rectification to control the output of the DC power when the AC power is input; the DC/DC module 2 has a DC conversion function and can convert a fixed DC voltage into a variable DC voltage.
Specifically, when the AC power source is used to supply power to the vehicle, the AC charging gun is connected with the vehicle AC socket at the vehicle-mounted end, the AC power source end outputs AC power, the AC power enters the vehicle-mounted charger 10 through the vehicle AC socket, the control module detects the AC power, the AC/DC module 1 is controlled to rectify the input AC power so as to output the DC power to the DC/DC module 2, and the DC/DC module 2 converts the DC power into the DC power required by the vehicle-mounted battery according to the requirement of the battery management system, so that the function of AC charging of the vehicle is realized.
In the embodiment, since the interface of the DC charging pile is a DC charging gun, which is incompatible with the vehicle AC socket at the vehicle-mounted end, and cannot be directly connected, so that the vehicle needs to be charged by the charging adapter, the control module 3 is further configured to control the AC/DC module 1 to conduct when detecting the DC power, to transmit the DC power, and control the DC/DC module 2 to convert the DC power into the DC power required by the vehicle battery. That is, the AC/DC module 1 can control the AC power input/output so that only the conduction function is performed without changing the DC power when the DC power is input.
Specifically, when the direct-current power supply is adopted to supply power to the vehicle, the direct-current charging gun is connected with a vehicle-mounted alternating-current socket of the vehicle-mounted end through the charging adapter. The direct current power supply end outputs direct current, the direct current enters the vehicle-mounted charger 10 through the charging adapter and the vehicle-mounted alternating current socket respectively, and then the control module 3 detects the direct current and then controls the AC/DC module 1 to conduct the input direct current and transmit the direct current to the DC/DC module 2, and the DC/DC module 2 converts the direct current into direct current required by the vehicle-mounted battery according to the requirement of the battery management system so as to charge the vehicle-mounted battery, thereby realizing the direct current charging function of the vehicle. That is, unlike the charging process using a DC power supply in the prior art, in the vehicle-mounted charger 10 of the embodiment of the present invention, the DC power output by the DC power supply may directly enter the vehicle-mounted charger 10 through the charging adapter, the AC/DC module 1 does not need to perform conversion from AC to DC, and direct-current charging can be completed only by adjusting and converting the input DC power through the DC/DC module 2, so as to reduce power loss and improve conversion efficiency.
For example, as shown in fig. 3, a change schematic diagram of a dc voltage value after the dc voltage is input to the vehicle is shown, where V1 is the voltage input by the dc charging pile, and the dc voltage after rectification by the V2-bit vehicle-mounted charger. Fig. 3 (a) shows a DC voltage value V1 between the vehicle-mounted AC outlet and the AC/DC module 1, fig. 3 (b) shows a DC voltage value V1 between the AC/DC module 1 and the DC/DC module 2, and fig. 3 (c) shows a DC voltage V2 required for converting the DC voltage V1 into a vehicle-mounted battery by the DC/DC module 2. As can be seen from the figure, in the embodiment of the invention, based on the charging adapter, the direct current of the direct current charging pile is connected to the vehicle-mounted charger 10, and the direct current V1 input by the charging pile is converted into the direct current signal V2 required by the battery through boost conversion in the vehicle-mounted charger 10, that is, from the power grid end to the battery end, no power conversion is required, and the power loss is reduced.
Therefore, through the cooperation of the charging adapter and the vehicle-mounted alternating current socket, the vehicle-mounted charger 10 of the embodiment of the invention plays a role in conducting after entering direct current charging, and the DC/DC module 2 regulates and converts the input direct current to finish direct current charging, namely, when the direct current charging is carried out, the vehicle only needs to change the charging strategy of the vehicle-mounted charger 10 without changing the hardware circuit of the vehicle, the direct current charging function can be realized, the problem that the vehicle has only an alternating current charging port in the prior art is solved, the use requirement of the vehicle on the direct current charging pile is met with the minimum engineering quantity, and the overall working mode can be seen, the regulation and control of the input power supply of the charging pile is realized through the direct current charging pile and the vehicle-mounted charger from the power grid to the battery, the middle conversion module is saved, the power loss is reduced, and the conversion efficiency is improved.
According to the vehicle-mounted charger 10 of the embodiment of the invention, based on the matching of the vehicle-mounted alternating current socket and the charging adapter, when direct current charging is performed, the control module 3 detects direct current, and then the AC/DC module 1 is controlled to be conducted so as to transmit the direct current, and the direct current is converted into direct current required by the vehicle-mounted battery through the DC/DC module 2 to complete direct current charging, so that when the direct current charging is performed, the vehicle-mounted charger 10 of the embodiment of the invention can realize the direct current charging function of the vehicle without changing a hardware circuit of the vehicle or adding a direct current charging port, and compared with the prior charging control equipment, the AC/DC module in the embodiment of the invention only plays a role in conducting, does not need to perform power conversion, reduces power loss and improves conversion efficiency.
In some embodiments, the control module 3 of the present invention is further configured to detect a dc charging identification signal, determine connection of the charging adapter, and feed back a vehicle-mounted charging permission signal to the charging adapter when it is determined that the vehicle meets a dc charging condition. That is, when the vehicle is charged, the control module 3 determines the charging mode according to the detected charging identification signal, so as to control the vehicle-mounted charger 10 to start the corresponding charging process. For example, when the vehicle is charged with dc, after the charging adapter is connected to the vehicle ac socket, the charging adapter end sends a dc charging identification signal to the vehicle-mounted charger 10, so that the control module 3 can determine that the charging adapter is connected when detecting the dc charging identification signal, and when determining that the vehicle meets dc charging conditions, for example, when the battery management system monitors battery deficiency, feedback the vehicle-mounted charging permission signal to the charging adapter.
An embodiment of the second aspect of the present invention provides a method for controlling dc charging of a vehicle, which is used for a vehicle-mounted charger, as shown in fig. 4, and the method of the embodiment of the present invention at least includes steps S1 to S3.
Step S1, detecting direct current.
In the embodiment, the method of the embodiment of the invention is used for the vehicle-mounted charger provided by the embodiment, because the interface of the direct-current charging pile is a direct-current charging gun and is not matched with the vehicle-mounted alternating-current socket of the vehicle-mounted end in size, and the direct-connection cannot be performed, so as to solve the problem that the vehicle charges on the direct-current charging pile. When the direct current charging is carried out, the direct current output by the direct current charging pile enters the vehicle-mounted charger through the charging adapter, and then the control module can detect the direct current.
And S2, controlling the conduction of an AC/DC module of the vehicle-mounted charger to transmit direct current.
In an embodiment, the AC/DC module may control the AC input DC output so as to perform a conduction function without changing the DC when there is a DC input. Specifically, after the vehicle-mounted charger enters a direct-current charging process, direct current enters an AC/DC module to be conducted after passing through a charging adapter and a vehicle-mounted alternating-current socket, so as to transmit the direct current.
And S3, controlling a DC/DC module of the vehicle-mounted charger to convert the direct current into the direct current required by the vehicle-mounted battery so as to charge the vehicle-mounted battery.
In an embodiment, the DC/DC module has a DC conversion function, and can convert a fixed DC voltage into a variable DC voltage, so that the DC is transmitted to the DC/DC module after being conducted by the AC/DC module, and the DC/DC module adjusts and converts the input DC according to a requirement of the battery management system, so that the DC is converted into a DC required by the vehicle-mounted battery, and the vehicle-mounted battery is charged, thereby completing a DC charging process.
According to the method for controlling the direct current charging of the vehicle, the vehicle-mounted alternating current socket is matched with the charging adapter, when the direct current charging is carried out, the direct current is detected through the control module, the AC/DC module is further controlled to be conducted so as to transmit the direct current, the direct current is converted into the direct current required by the vehicle-mounted battery through the DC/DC module, and the direct current charging is completed.
In an embodiment, before detecting the direct current, the method of the embodiment of the invention further includes determining that the direct current charging adapter is connected when the direct current charging identification signal is detected, and further determining whether the vehicle meets a direct current charging condition; if the vehicle meets the direct-current charging condition, feeding back a vehicle-mounted charging permission signal to the charging adapter. Specifically, since the interface of the direct-current charging pile is a direct-current charging gun and is incompatible with the vehicle-mounted alternating-current socket of the vehicle-mounted end, direct connection cannot be performed, and in order to solve the problem that the vehicle charges on the direct-current charging pile, in the embodiment of the invention, the butt joint between the direct-current charging gun and the vehicle-mounted alternating-current socket is completed through the charging pile joint so as to charge the vehicle, thereby identifying whether the charging adapter is connected with the vehicle-mounted alternating-current socket through the control module in the vehicle-mounted charger, when the control module detects a direct-current charging identification signal, determining that the charging adapter is connected, further judging whether the vehicle meets a direct-current charging condition, for example, identifying whether the charging is in a direct-current charging mode or not, and when the vehicle meets the direct-current charging condition, feeding back a vehicle-mounted charging permission signal to the charging adapter, and executing step S1.
Because the interface of the direct current charging pile is a direct current charging gun, and is incompatible with the vehicle-mounted alternating current socket of the vehicle-mounted end, and cannot be directly connected, so that the vehicle needs to be charged by the charging adapter, the charging adapter is provided in the embodiment of the invention and is used for being connected with the vehicle-mounted alternating current socket of the vehicle during direct current charging, and as shown in fig. 5, the charging adapter 20 in the embodiment of the invention comprises a direct current charging seat 4, an alternating current charging head 5, a control board 6, a first switch unit K1 and a second switch unit K2.
Wherein the direct current charging seat 4 comprises a first power input port DC+ for inputting positive direct current and a second power input port DC < - >; the ac charging head 5 includes a first power output port L1 for outputting positive dc power and a second power output port N for outputting negative dc power; a first end of the first switch unit K1 is connected with the first power input port DC+, and a second end of the first switch unit K1 is connected with the first power output port L1; the first end of the second switch unit K2 is connected with the second power input port DC-and the second end of the second switch unit K2 is connected with the second power output port N; the control board 6 is connected with the first switch unit K1 and the second switch unit K2, respectively, and is used for responding to the vehicle-mounted charging permission signal and controlling the first switch unit K1 and the second switch unit K2 to be closed.
In an embodiment, as shown in fig. 5, the dc charging stand 4 further includes a first ground port PE1 for connecting to a ground terminal of the dc power supply, and the ac charging head 5 further includes a second ground port PE2 for connecting to a ground terminal of the vehicle-mounted ac socket, and the second ground port PE2 is connected to the first ground port PE 1.
In the embodiment, the charging adapter 20 of the embodiment of the present invention completes the docking between the dc charging gun and the vehicle ac socket, that is, the dc charging socket 4 is connected with the dc charging gun and the ac charging head 5 is connected with the vehicle ac socket. When the direct current charging pile is used for charging the vehicle, the vehicle-mounted charger at the vehicle-mounted end can recognize that the charging adapter 20 is connected, and send a vehicle-mounted charging permission signal to the charging adapter 20, and in response to the vehicle-mounted charging permission signal, the control board 6 in the charging adapter 20 controls the first switch unit K1 and the second switch unit K2 to be closed so as to form a charging loop, and then direct current output by the direct current charging pile end is respectively input through the first power input port DC+ and the second power input port DC-and is output through the first power output port L1 and the second power output port N, and then enters the vehicle-mounted charger, and the direct current is charged into the vehicle-mounted battery through internal processing of the vehicle-mounted charger, so that the direct current charging of the vehicle is completed.
Therefore, according to the charging pile connector 20 of the embodiment of the invention, power conversion is not needed, only communication with a charging pile is needed, the failure rate is reduced, the cost is lower, and compared with the existing charging control equipment, the charging pile connector 20 of the embodiment of the invention has the advantages that the control panel 6 is integrated on the charging adapter 20, a conversion module is not needed, the size is reduced, the charging pile connector 20 is light and easy to carry and convenient to operate, and the conversion module is saved, so that the power loss is reduced, and the conversion efficiency is improved.
According to the charging adapter 20 of the embodiment of the invention, when direct current charging is performed, based on the connection of the direct current charging seat 4 and the direct current power supply and the connection of the alternating current charging head 5 and the vehicle-mounted alternating current socket, the control board 6 controls the first switch unit K1 and the second switch unit K2 to be closed in response to the vehicle-mounted charging permission signal sent by the vehicle-mounted end, so that direct current input by the direct current power supply end can enter the vehicle-mounted end through the power input port and the power output port, and the direct current charging process is completed.
In an embodiment, as shown in fig. 5, the dc charging stand 4 further comprises a first charging communication port s+ and a second charging communication port S-. The first charging communication port s+ and the second charging communication port S-are both connected with the control board 6, and are used for performing direct current charging message interaction with the direct current charging pile, and the control board 6 is also used for sending a charging adjustment instruction to the direct current charging pile when determining that the output direct current of the direct current charging pile exceeds the vehicle-mounted charging allowable range according to the direct current charging message. That is, the charging adapter 20 of the embodiment of the invention not only needs to dock the interface of the charging adapter 20, but also needs to communicate with the direct current charging device, so as to control the voltage and power of the direct current charging within the allowable range of vehicle charging, that is, the input voltage and power safety range of the vehicle-mounted power supply, for example, control the direct current output voltage to 220 (±15%) V and the power to the power of the vehicle-mounted power supply, thereby ensuring the input safety of the vehicle-mounted charger.
In an embodiment, as shown in fig. 5, the dc charging stand 4 further includes a first charging connection port CC2 and a second charging connection port CC1. The first charging connection port CC2 and the second charging connection port CC1 are both connected with the control board 6, and are used for inputting a direct current charging connection signal, and a charging mode identification unit is provided on the control board 6, and generates a direct current charging identification signal based on the direct current charging connection signal. That is, the charging adapter 20 of the embodiment of the present invention follows a standard ac charging form, and generates a dc charging identification signal through the charging mode identification unit, for example, the charging adapter can inform the vehicle-mounted charger that the charging is dc charging in a specific identification resistor or PWM wave characteristic value form, and adjusts the charging control strategy of the vehicle-mounted charger.
In the embodiment, as shown in fig. 5, the ac charging head 5 further includes a first connection detection port CC and a second connection detection port CP. The first connection detection port CC and the second connection detection port CP are both connected with the control board 6, and are used for outputting a direct current charging identification signal to the vehicle-mounted charger. That is, after the direct current charging seat 4 is connected with the direct current charging pile, the control board 6 can identify the direct current charging connection signal through the first charging connection port CC2 and the second charging connection port CC1, and generate a direct current charging identification signal, and then transmit the direct current charging identification signal to the vehicle-mounted charger through the first connection detection port CC and the second connection detection port CP, so that the vehicle-mounted charger knows that the charging mode is direct current charging.
In an embodiment, as shown in fig. 5, the dc charging stand 4 further includes a first backup port a+ and a second backup port a-. Wherein, the first standby port a+ and the second standby port a-are both connected with the control board 6, so as to facilitate the subsequent function expansion of the charging adapter 20.
A fourth aspect of the invention provides a vehicle, as shown in fig. 6, the vehicle 30 of the embodiment of the invention includes the battery 8, the vehicle-mounted ac outlet 7, and the vehicle-mounted charger 10 of the above embodiment.
The vehicle-mounted alternating current socket 7 is used for being matched and connected with the charging adapter provided by the embodiment; the vehicle-mounted charger 10 is connected to the vehicle-mounted ac outlet 7, and is configured to charge the battery 8 with dc power. Specifically, when the vehicle 30 is charged by using the direct-current charging pile, the direct-current charging pile is connected to the vehicle-mounted charger 10 through the vehicle-mounted alternating-current socket 7 in a matched manner with the charging adapter provided in the above embodiment, and the direct-current charging pile is connected to the vehicle-mounted charger 10, and the direct-current charging pile is converted into the direct-current required by the battery 8 through boost conversion in the vehicle-mounted charger 10, so that the direct-current charging function is realized.
According to the vehicle 30 provided by the embodiment of the invention, when direct current charging is performed, the vehicle is connected with the charging adapter in a matched manner through the vehicle-mounted alternating current socket 8, direct current enters the vehicle-mounted charger 10 through the charging adapter, the vehicle-mounted alternating current socket 8, and the charging pile input power supply is regulated and controlled through the vehicle-mounted charger 10, so that the direct current charging of the battery 7 is completed, the direct current charging function of the vehicle is realized, the charging adapter is not required to perform power conversion, and the conversion efficiency is improved.
The following description is given by way of example of the process of dc charging a vehicle in conjunction with fig. 7, and the detailed process is as follows.
For a direct current charging pile terminal:
and S4, inserting a charging adapter, namely docking the charging adapter with the direct current gun, and executing the step S5.
And S5, the direct-current charging pile provides an auxiliary power supply for a control panel of the charging adapter through an auxiliary power supply terminal connection loop so as to wake up the control panel, and the step S6 is executed.
And S6, carrying out direct-current charging message interaction, namely communicating the direct-current charging pile with a control board inside the charging adapter so as to control the charging signal of the direct-current charging pile within the vehicle-mounted charging allowable range, and executing the step S7.
Step S7, outputting direct current.
For a charging transfer headend:
step S8, inserting a direct current gun and inserting an on-vehicle alternating current socket, and executing step S9.
And S9, providing an auxiliary power supply based on the direct-current charging pile to wake up the control board, detecting a direct-current charging connection signal by the control board, sending a direct-current charging identification signal to the vehicle-mounted charger end, and executing the step S10.
And step S10, receiving a direct-current charging identification signal based on the vehicle-mounted charger, feeding back a charging adjustment signal to the control board, and further carrying out direct-current charging message interaction between the control board and the direct-current charging pile end so as to control the charging signal of the direct-current charging pile within the vehicle-mounted charging allowable range, and executing step S11.
And S11, judging whether the vehicle-mounted power supply allows direct-current charging or not, namely, after the vehicle-mounted charger end is inserted in the recognition charging adapter and the charging signal of the direct-current charging pile is determined to be controlled within the vehicle-mounted charging allowable range, feeding back a vehicle-mounted charging allowable signal to the control board, and executing the step S12 by the control board according to the received vehicle-mounted charging allowable signal.
Step S12, the relays K1 and K2 are closed, and direct current is output.
For a vehicle-mounted charger end:
step S13, inserting a charging adapter, and executing step S14.
And S14, the vehicle-mounted charger wakes up, identifies the inserted charging adapter, and executes the step S15.
And S15, starting a direct-current charging process by the vehicle-mounted charger according to the direct-current charging identification signal sent by the charging adapter head end, namely sending a charging adjustment signal to the control board by the vehicle-mounted charger, and feeding back the vehicle-mounted charging permission signal to the charging adapter after determining that the charging signal of the direct-current charging pile is controlled within the vehicle-mounted charging permission range, and executing the step S16.
And S16, inputting the direct current into a vehicle-mounted charger through a direct current charging pile and a charging adapter, and enabling the vehicle to enter a direct current charging state.
Therefore, according to the process of carrying out direct current charging on the vehicle, based on the charging adapter provided by the embodiment of the invention, when the whole charging loop is seen, the direct current charging pile and the vehicle-mounted charger are arranged from the power grid to the battery, the vehicle-mounted charger regulates and controls the input power supply of the charging pile, the middle conversion module is saved, the overall conversion efficiency is improved, and the use requirement of the vehicle on the direct current charging pile is met.
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). Additionally, the computer-readable medium may even be paper or other suitable medium upon 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 part of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, 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 as 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 (8)

1. The charging adapter is characterized in that the charging adapter is connected with a vehicle during direct current charging, the vehicle comprises a vehicle-mounted battery, a vehicle-mounted alternating current socket and a vehicle-mounted charger, the vehicle-mounted alternating current socket is connected with the charging adapter during direct current charging, and the vehicle-mounted charger is connected with the vehicle-mounted alternating current socket and is used for carrying out direct current charging on the vehicle-mounted battery;
the vehicle-mounted charger comprises an AC/DC module, a DC/DC module and a control module, wherein the control module is used for detecting direct current, controlling the AC/DC module to be conducted so as to transmit the direct current and controlling the DC/DC module to convert the direct current into direct current required by a vehicle-mounted battery, and the control module is also used for detecting a direct current charging identification signal, determining that a charging adapter is connected and feeding back a vehicle-mounted charging permission signal to the charging adapter when the fact that the vehicle meets the direct current charging condition is determined;
the charging adapter includes:
the direct current charging seat comprises a first power input port for inputting positive direct current and a second power input port for inputting negative direct current;
an alternating current charging head comprising a first power output port for outputting the positive direct current and a second power output port for outputting the negative direct current;
the first end of the first switch unit is connected with the first power input port, and the second end of the first switch unit is connected with the first power output port;
the first end of the second switch unit is connected with the second power input port, and the second end of the second switch unit is connected with the second power output port;
and the control board is respectively connected with the first switch unit and the second switch unit and is used for responding to the vehicle-mounted charging permission signal and controlling the first switch unit and the second switch unit to be closed.
2. The charging adapter of claim 1, wherein the dc charging cradle further comprises:
the first charging communication port and the second charging communication port are connected with the control board and used for carrying out direct-current charging message interaction with the direct-current charging pile;
and the control board is also used for sending a charging adjustment instruction to the direct-current charging pile when the output direct current of the direct-current charging pile is determined to exceed the vehicle-mounted charging allowable range according to the direct-current charging message.
3. The charging adapter of claim 2, wherein the dc charging cradle further comprises:
the first charging connection port and the second charging connection port are connected with the control board and are used for inputting direct-current charging connection signals;
the control panel is provided with a charging mode identification unit, and the charging mode identification unit generates a direct-current charging identification signal based on the direct-current charging connection signal.
4. A charging adapter according to claim 3, wherein the ac charging head further comprises:
the first connection detection port and the second connection detection port are connected with the control board and used for outputting the direct current charging identification signal to the vehicle-mounted charger.
5. The charging adapter of claim 4, wherein the dc charging cradle further comprises:
the first standby port and the second standby port are connected with the control board.
6. A vehicle, characterized by comprising:
a vehicle-mounted ac outlet for connection with the charging adapter of any one of claims 1-5 when used for dc charging.
7. A method of controlling direct current charging of a vehicle for use in the vehicle of claim 6, comprising:
detecting direct current;
controlling the conduction of an AC/DC module of the vehicle-mounted charger to transmit direct current;
and controlling a DC/DC module of the vehicle-mounted charger to convert the direct current into direct current required by a vehicle-mounted battery so as to charge the vehicle-mounted battery.
8. The method of controlling direct current charging of a vehicle of claim 7, wherein prior to detecting direct current, the method further comprises:
when the direct-current charging identification signal is detected, determining that the direct-current charging adapter is connected;
after the direct-current charging adapter is determined to be connected, determining whether a vehicle meets a direct-current charging condition or not;
and the vehicle meets the direct-current charging condition, and feeds back a vehicle-mounted charging permission signal to the charging adapter.
CN202010617197.9A 2020-06-30 2020-06-30 Vehicle-mounted charger, method for controlling direct-current charging of vehicle, charging adapter and vehicle Active CN113859003B (en)

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