CN113858992B - Charging switching device, vehicle and direct-current charging control method - Google Patents

Charging switching device, vehicle and direct-current charging control method Download PDF

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Publication number
CN113858992B
CN113858992B CN202010617187.5A CN202010617187A CN113858992B CN 113858992 B CN113858992 B CN 113858992B CN 202010617187 A CN202010617187 A CN 202010617187A CN 113858992 B CN113858992 B CN 113858992B
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terminal
charging
connection
vehicle
switch
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CN113858992A (en
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南天宇
罗建兴
赵颖
石雷
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
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • 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
    • B60L53/60—Monitoring or controlling charging stations
    • 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
    • B60L53/66—Data transfer between charging stations and vehicles
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of 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 provides a charging switching device, a vehicle and a direct current charging control method, wherein the charging switching device comprises the following components: a direct current side connection port; an alternating current side connection port; the first end of the identification resistor is connected to the connecting wire of the first grounding terminal and the second grounding terminal, and the second end of the identification resistor is connected to the connecting wire of the first connection confirmation terminal and the second connection confirmation terminal; the temperature detection module is used for detecting the charging temperature; the switch module is connected with the temperature detection module and is used for controlling the disconnection of at least one branch circuit among the connection confirmation branch circuit, the connection control confirmation branch circuit and the branch circuit where the identification resistor is located when the charging temperature exceeds the temperature threshold value.

Description

Charging switching device, vehicle and direct-current charging control method
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to a charging switching device, a vehicle, and a direct current charging control method.
Background
Along with the rapid development of new energy vehicles and the stable construction of related charging auxiliary facilities such as direct current charging piles, alternating current charging piles and alternating current-direct current charging piles, the charging convenience and safety of the new energy vehicles gradually become one of main factors of vehicle purchase selection of vehicle owners.
At present, the plug-in type power vehicle has the defects of insufficient charging facilities, inconvenient charging and the like caused by factors such as occupation of oil vehicles, damage of facilities, construction of stations and the like, and can be connected with a vehicle-mounted alternating current charging socket through a charging switching device, so that the plug-in type hybrid vehicle is charged by the direct current charging device.
However, in the actual use process of the charging switching device, if the switching device is not in full contact with the charging gun or the charging interface of the vehicle or the charging gun and the switching device have quality problems, in the charging process, the switching device is connected with high-power charging equipment, a larger current passes through a contact point of the switching device, the switching device can work for a long time in a carrying way under the condition of no protection device, the heating value between the switching device and the charging equipment is gradually increased, the heat accumulation is continuously increased, short circuit can occur, and dangerous consequences such as fire disaster and the like are even caused.
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 adapter device, which can avoid the problem of overheat of the device during charging, and improve charging safety.
A second object of the invention is to propose a vehicle.
A third object of the present invention is to provide a dc charging control method.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a charging adapter, including: the direct-current side connection port is suitable for being connected with direct-current charging equipment in a matching way and comprises a direct-current power supply positive terminal, a direct-current power supply negative terminal, a first communication terminal, a second communication terminal, a first grounding terminal, a first connection confirmation terminal and a first connection control confirmation terminal; an ac side connection port adapted to be matingly 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 ac-to-phase terminal, a third ac-to-phase terminal, a second ground terminal, a second connection confirmation 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 terminal, the first communication terminal is electrically connected with the second alternating current terminal, the second communication terminal is electrically connected with the third alternating current terminal, the first grounding terminal is electrically connected with the second grounding terminal, the first connection confirmation terminal is connected with the second connection confirmation terminal to form a connection confirmation branch, and the first connection control confirmation terminal is electrically connected with the second connection control confirmation terminal to form a connection control confirmation branch; the first end of the identification resistor is connected to the connecting line of the first grounding terminal and the second grounding terminal, and the second end of the identification resistor is connected to the connecting line of the first connection confirmation terminal and the second connection confirmation terminal; the temperature detection module is used for detecting the charging temperature; and the switch module is connected with the temperature detection module and is used for controlling at least one branch circuit among the connection confirmation branch circuit, the connection control confirmation branch circuit and the branch circuit where the identification resistor is positioned to be disconnected when the charging temperature exceeds a temperature threshold value.
According to the charging switching device provided by the embodiment of the invention, the temperature detection module and the switch module are arranged in the charging switching device, when a vehicle is subjected to direct current charging, the direct current side connecting port of the charging switching device is connected with the direct current charging equipment in a matching way, the alternating current side connecting port is connected with the vehicle-mounted alternating current charging socket in a matching way, the direct current charging equipment charges the vehicle-mounted end through the charging switching device, in the direct current charging process, the temperature detection module is used for detecting the charging temperature in real time, and as the switch module is connected with the temperature detection module, when the temperature detection module detects that the charging temperature exceeds the temperature threshold value, the switch module controls at least one of the connection confirmation branch, the connection control confirmation branch and the branch where the identification resistor is located to be disconnected, and the connection confirmation or connection control confirmation link in the direct current charging process is interrupted, so that the vehicle-mounted end cannot normally receive direct current charging signals, the direct current charging process of the vehicle is interrupted, the protection of the direct current charging process is realized, the condition that the direct current charging equipment and the charging switching device are continuously increased in temperature to cause short circuit to occur is avoided, and the charging safety is improved.
In some embodiments, the temperature detection module is disposed at an end of the positive terminal of the dc power supply, and the temperature sensor is disposed at the end of the terminal to detect the highest temperature of the terminal, so as to protect the circuit in time when the temperature reaches the temperature threshold.
In some embodiments, the temperature detection module is disposed at an end of the negative terminal of the dc power supply, and the temperature sensor is disposed at the end and can detect the highest temperature of the terminal, so that when the temperature reaches the temperature threshold, the circuit can be protected in time.
In some embodiments, the first connection confirmation terminal and the second connection confirmation terminal are connected with a first node; the switch module includes: the first end of the first switch is connected with the second end of the identification resistor, and the second end of the first switch is connected with the first node; the control unit is connected with the temperature detection module and is used for controlling the first switch to be disconnected when the charging temperature exceeds the temperature threshold value, detecting the charging temperature through the temperature detection module, controlling the first switch to be disconnected when the charging temperature is overlarge, avoiding the occurrence of the overlarge charging temperature, causing the charging switching device to be connected with charging equipment and being unable to be disconnected, and reducing the charging convenience.
In some embodiments, the switch module further comprises: a second switch, a first end of which is connected with the first connection confirmation terminal, and a second end of which is connected with the first node; the control unit is also used for controlling the first switch to be closed and controlling the second switch to be opened when the charging temperature exceeds the temperature threshold value, and controlling the second switch to be opened through the control unit when the charging temperature is too high, so as to terminate the charging process and protect the safety of the charging circuit.
In some embodiments, the switch module further comprises: a third switch, a first end of which is connected to the first node, and a second end of which is connected to the second connection confirmation terminal; the control unit is further used for controlling the first switch and the second switch to be closed and controlling the third switch to be opened when the charging temperature exceeds the temperature threshold value, and controlling the third switch unit to be opened when the charging temperature is too high, so that the charging process is stopped, and the safety of the charging circuit is protected.
In some embodiments, the switch module further comprises: a fourth switch, a first end of which is connected with the first connection control confirmation terminal, and a second end of which is connected with the second connection control confirmation terminal; the control unit is further used for controlling the fourth switch to be turned off when the charging temperature exceeds the temperature threshold value, and controlling the third switch unit to be turned off when the charging temperature is too high, so that the charging process is stopped, and the safety of the charging circuit is protected.
In order to achieve the above object, a second aspect of the present invention provides a vehicle including: a vehicle-mounted alternating-current charging socket for matching with the charging switching device described in the above embodiment, the vehicle-mounted alternating-current charging socket including a third connection confirmation terminal and a third connection control confirmation terminal; a vehicle control device connected to the third connection confirmation terminal to acquire a first detection signal, the vehicle control device connected to the third connection control confirmation terminal to acquire a second detection signal; the vehicle control device is used for controlling the direct current charging state according to the first detection signal and the second detection signal.
According to the vehicle provided by the embodiment of the invention, when the vehicle is charged by direct current, the vehicle-mounted alternating current charging socket is connected with the charging switching device in a matching way, the vehicle control device controls the direct current charging state according to the acquired first detection signal and second detection signal, the current charging temperature is perceived in real time, and when the charging temperature is too high, the charging circuit can be disconnected in time, so that the direct current charging safety is improved.
In order to achieve the above object, a third aspect of the present invention provides a dc charging control method, including: acquiring a first detection signal and a second detection signal; and controlling the direct current charging state according to the first detection signal and the second detection signal.
According to the direct current charging control method provided by the embodiment of the invention, the direct current charging state is controlled according to the detection signals by acquiring the first detection signal and the second detection signal, so that the protection of the direct current charging process is realized, the charging flow can be interrupted in time when the charging temperature is too high, the condition of short circuit caused by continuous temperature rise of the direct current charging equipment and the charging switching device is avoided, and the direct current charging safety is improved.
In some embodiments, controlling the dc charge state according to the first detection signal and the second detection signal includes: any one of the first detection signal and the second detection signal is abnormal, and direct current charging is terminated; or the first detection signal and the second detection signal are normal, the fact that the vehicle is connected with the charging switching device and the direct-current charging equipment is confirmed, direct-current charging is started, the charging state of the vehicle is controlled according to whether the detection signals are normal or not, and the safety of the charging circuit is improved.
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 a DC charging device for charging a vehicle according to one embodiment of the invention;
fig. 2 is a schematic circuit diagram of a charge switching device according to one embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a dc charging device for dc charging a vehicle through a switching device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a control flow of the charge switching device when the charge temperature is too high according to an embodiment of the present invention;
FIG. 5 is a block diagram of a vehicle according to one embodiment of the invention;
fig. 6 is a flowchart of a direct current charge control method according to an embodiment of the present invention.
Detailed Description
In the embodiment, as shown in fig. 1, when a vehicle with a vehicle-mounted alternating-current charging socket is charged by adopting direct-current charging equipment, the direct-current charging equipment and the vehicle-mounted alternating-current charging socket cannot be matched in structure and function and cannot be directly connected, and a charging switching device is adopted, so that the direct-current charging equipment is physically connected with the vehicle-mounted alternating-current charging socket in a transit connection mode, and the direct-current charging function of the vehicle is realized.
Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.
A charge changeover device according to an embodiment of the first aspect of the present invention is described below with reference to fig. 2 to 4.
As shown in fig. 2 and 3, the charging adapter 1 according to the embodiment of the present invention includes a dc side connection port 10, an ac side connection port 20, an identification resistor R5, a temperature detection module 40, and a switch module 50.
The direct current side connection port 10 is suitable for being connected with a direct current charging device in a matching way, and the direct current side connection port 10 comprises a direct current power supply positive terminal DC+, a direct current power supply negative terminal DC-, a first communication terminal S+, a second communication terminal S-, a first grounding terminal PE, a first connection confirmation terminal CC2 and a first connection control confirmation terminal CC1; the ac side connection port 20 is adapted to be connected in a mating manner with the vehicle-mounted ac charging receptacle, and the ac side connection port 20 includes a first ac-to-ac terminal L1, a neutral terminal N, a second ac-to-phase terminal L2, and a third ac-to-phase terminal L3, a second ground terminal PE, a second connection confirmation terminal CC, and a second connection control confirmation terminal CP; the direct current power supply positive electrode terminal DC+ is electrically connected with the first alternating current terminal L1, the direct current power supply negative electrode terminal DC-is electrically connected with the neutral line terminal N, the first communication terminal S+ is electrically connected with the second alternating current terminal L2, the second communication terminal S-is electrically connected with the third alternating current terminal L3, the first grounding terminal PE is electrically connected with the second grounding terminal PE, the first connection confirmation terminal CC2 is connected with the second connection confirmation terminal CC to form a connection confirmation branch, and the first connection control confirmation terminal CC1 is electrically connected with the second connection control confirmation terminal CP to form a connection control confirmation branch; the first end of the identification resistor R5 is connected to the connecting line of the first grounding terminal PE and the second grounding terminal PE, and the second end of the identification resistor R5 is connected to the connecting line of the first connection confirmation terminal CC2 and the second connection confirmation terminal CC; the temperature detection module 40 is used for detecting the charging temperature; the switch module 50 is connected to the temperature detection module 40, and is configured to control at least one of the connection confirmation branch, the connection control confirmation branch, and the branch where the identification resistor R5 is located to be disconnected when the charging temperature exceeds the temperature threshold.
In the embodiment, when the vehicle is in ac charging, the ac charging device is matched with the vehicle-mounted ac charging socket, and the ac charging device is directly connected to the vehicle-mounted ac charging socket without the charging switching device 1, so that the ac charging function of the vehicle is realized.
The following describes the process of dc charging a vehicle in detail with reference to fig. 3, and as shown in fig. 3, a schematic circuit diagram of a dc charging device for dc charging a vehicle through a switching device according to an embodiment of the present invention is shown. When the vehicle is charged in a direct current mode, the direct current charging equipment is not matched with the vehicle-mounted alternating current charging socket, the physical connection between the direct current charging equipment and the vehicle-mounted alternating current charging socket is realized through the charging switching device 1, the positive terminal DC+ of the direct current power supply is electrically connected with the first alternating current terminal L1, the negative terminal DC-neutral terminal N of the direct current power supply is connected for transmitting a direct current charging signal so as to charge the vehicle-mounted end, the first communication terminal S+ is electrically connected with the second alternating current terminal L2, the second communication terminal S-is electrically connected with the third alternating current terminal L3, the direct current charging message interaction between the direct current charging equipment and the vehicle-mounted end is realized, the first charging connection confirmation terminal CC2 is used for transmitting a direct current charging connection signal, the first control connection confirmation terminal CC1 is used for carrying out the direct current charging message interaction with the direct current end of the direct current charging equipment, and the first connection confirmation terminal CC2 is connected with the second grounding terminal CC to form a confirmation branch, and transmits a direct current charging connection signal to the vehicle-mounted end, namely, the direct current charging connection signal is used for determining whether the direct current charging equipment is connected with the charging switching device 1, the first connection control confirmation terminal CC1 is connected with the second connection control confirmation terminal CP to form a confirmation branch, the direct current input to the vehicle-mounted end is controlled to be within a charging allowable range, charging safety is protected, when the direct current charging equipment is in high power, the direct current power supply positive terminal DC+ and the direct current power supply negative terminal DC-have high current to pass through, so that the heat of the direct current charging equipment and the charging switching device 1 is gradually increased, the charging safety hidden danger exists, the temperature detection module 40 is arranged in the charging switching device 1, the charging temperature in the direct current charging process is detected in real time by adopting the temperature detection module 40, when the charging temperature exceeds the temperature threshold value, the switch module 50 controls the connection confirmation branch, the connection control branch and the identification resistor R5 to be opened or closed on the branch, and interferes with the connection confirmation link and the connection control link in the direct current charging process, so that the connection confirmation terminal CC of the vehicle-mounted terminal cannot receive a direct current charging connection signal, the connection control confirmation terminal CP of the vehicle-mounted terminal cannot receive a direct current power charging signal, and the detection signal is abnormal, thereby terminating the direct current charging process, preventing the charging process from being interrupted in time due to the excessively high charging temperature in the direct current charging process, causing overheat condition of the charging switching device 1 or the direct current charging equipment, heating and expanding the equipment shell, and after the charging is finished, the connection between the equipment is difficult to be disconnected, so that the charging convenience is reduced.
According to the charging switching device 1 of the embodiment of the invention, the temperature detection module 40 and the switch module 50 are arranged in the charging switching device 1, when a vehicle is charged in a direct current manner, the direct current side connection port 10 of the charging switching device 1 is connected with direct current charging equipment in a matching manner, the alternating current side connection port 20 is connected with a vehicle-mounted alternating current charging socket in a matching manner, the direct current charging equipment charges a vehicle-mounted end through the charging switching device 1, in the direct current charging process, the temperature detection module 40 detects the charging temperature in real time, the switch module 50 is connected with the temperature detection module 40, when the temperature detection module 40 detects that the charging temperature exceeds a temperature threshold value, at least one of a connection confirmation branch, a connection control confirmation branch and a branch where the identification resistor R5 is located is disconnected, and the connection confirmation or connection control confirmation link in the direct current charging process is interrupted, so that the direct current charging process of the vehicle-mounted end cannot normally receive a direct current charging signal is interrupted, the protection of the direct current charging process of the vehicle is realized, the direct current charging process is avoided, the direct current charging equipment and the charging switching device 1 is prevented from continuously rising in temperature due to the serious consequences, and the user experience is improved.
In some embodiments, as shown in fig. 2, the temperature detection module 40 is disposed at an end of the positive terminal dc+ of the DC power supply, when the DC power supply is charged, the positive terminal dc+ of the DC power supply is used for transmitting a DC charging signal, when the DC charging current is too large, the positive terminal dc+ of the DC power supply has a larger current passing through, the temperature detection module 40 is disposed at an end of the terminal, and when the temperature of the terminal reaches a temperature threshold, the switch module 50 is used for interrupting the connection confirmation branch or the charging connection control confirmation branch by controlling at least one disconnection, interrupting the DC charging process in time, preventing the charging temperature from rising continuously, protecting the charging circuit, and providing user experience.
In some embodiments, as shown in fig. 2, the temperature detection module 40 is disposed at an end of the negative terminal DC-of the DC power supply, and when the DC power supply is charged, the negative terminal DC-of the DC power supply is used for transmitting a DC charging signal, and when the DC charging current is too large, a larger current passes through the negative terminal DC-of the DC power supply, the temperature detection module 40 is disposed at an end of the terminal, and when the temperature of the terminal reaches a temperature threshold, the switch module 50 is used for interrupting the connection confirmation branch or the charging connection control confirmation branch by controlling at least one disconnection, so as to interrupt the DC charging process in time, prevent the charging temperature from rising continuously, protect the charging circuit, and provide user experience.
In some embodiments, as shown in fig. 3, a first node a is provided on a connection line of the first connection confirmation terminal CC2 and the second connection confirmation terminal CC; the switch module 50 includes a first switch 51 and a control unit, a first end of the first switch 51 is connected to a second end of the identification resistor R5, and a second end of the first switch 51 is connected to a first node; the control unit is connected to the temperature detection module 40 for controlling the first switch 51 to be opened when the charging temperature exceeds a temperature threshold.
In an embodiment, as shown in fig. 3, when the vehicle performs dc charging, the dc side connection port 10 of the charging switching device 1 is connected with the dc end of the dc charging device in a matching manner, two ends of the resistor R3 of the dc end of the dc charging device are respectively connected with the connection confirmation terminal CC and the ground terminal of the dc end, the ac side connection port 20 is connected with the ac end of the vehicle in a matching manner, the dc charging signal is subjected to dc charging for the vehicle-mounted end via the charging switching device 1, the temperature detection module 40 detects the charging temperature of the dc charging in real time, when the charging temperature exceeds the temperature threshold, that is, the dc charging has an over-temperature phenomenon, the control unit controls the first switch 51 to be turned off, cuts off the circuit where the identification resistor R5 is located, is connected with the second connection confirmation terminal CC of the charging switching device 1 only through the resistor R3, the connection confirmation signal received by the connection confirmation terminal CC of the vehicle-mounted ac end is abnormal, the signal of the detection point 3 is abnormal, and the vehicle control device 30 at the vehicle-mounted end terminates the dc charging process, and when the temperature detection module 40 detects that the charging temperature is lower than the temperature threshold, the control module closes each branch, and the normal dc charging flow is restored.
In some embodiments, as shown in fig. 3, the switch module 50 further includes a second switch 53, a first end of the second switch 53 is connected to the first connection confirmation terminal CC2, and a second end of the second switch 53 is connected to the first node a; the control unit is further configured to control the first switch 51 to be closed and the second switch 53 to be opened when the charging temperature exceeds the temperature threshold.
In the embodiment, when the vehicle performs dc charging, the dc charging device performs dc charging for the vehicle-mounted terminal through the charging switching device 1, the temperature detection module 40 detects the charging temperature of the dc charging in real time, when the charging temperature exceeds the temperature threshold, that is, the dc charging has an over-temperature phenomenon, the control unit controls the first switch 51 to be closed and controls the second switch 53 to be opened, cuts off the connection confirmation branch, that is, the branch where the resistor R3 is located, and connects only through the second connection confirmation terminal CC of the resistor R5 of the charging switching device 1, the connection confirmation terminal CC of the vehicle-mounted ac terminal cannot receive a dc connection signal, the signal of the detection point 3 is abnormal, the vehicle control device 30 of the vehicle-mounted terminal terminates the dc charging process, and when the temperature detection module 40 detects that the charging temperature is lower than the temperature threshold, the control switch module closes each branch, and resumes the normal dc charging flow.
In some embodiments, as shown in fig. 3, the switch module 50 further includes a third switch 54, a first end of the third switch 54 is connected to the first node a, and a second end of the third switch 54 is connected to the second connection confirmation terminal CC; the control unit is further configured to control the first switch 51 and the second switch 53 to be turned on and control the third switch 54 to be turned off when the charging temperature exceeds a temperature threshold, and control the direct current charging device to perform direct current charging for the vehicle-mounted terminal via the charging switching device 1 when the vehicle is in direct current charging, the temperature detection module 40 detects the charging temperature of the direct current charging in real time, when the charging temperature exceeds the temperature threshold, that is, the direct current charging has an over-temperature phenomenon, the control unit controls the first switch 51 and the second switch 53 to be turned on and controls the third switch 54 to be turned off, that is, the branches where the resistors R3 and R5 are located are turned off, the signal of the detection point 3 is abnormal, the vehicle control device 30 at the vehicle-mounted terminal terminates the direct current charging process, and when the temperature detection module 40 detects that the charging temperature is lower than the temperature threshold, control the switch module to turn on each branch, and resume a normal direct current charging flow.
In some embodiments, as illustrated in fig. 3, the switch module 50 further includes a fourth switch 55, a first end of the fourth switch 55 is connected to the first connection control confirm terminal CC1, and a second end of the fourth switch 55 is connected to the second connection control confirm terminal CP; the control unit is further configured to control the fourth switch to be turned off when the charging temperature exceeds the temperature threshold, and when the vehicle performs dc charging, the temperature detection module 40 detects the charging temperature of the dc charging in real time, and when the charging temperature exceeds the temperature threshold, that is, the dc charging has an over-temperature phenomenon, control the fourth switch 55 to be turned off, disconnect the connection control confirmation branch, connect the connection control confirmation terminal CP of the vehicle-mounted terminal, and fail to perform dc message interaction with the vehicle-mounted terminal, the signal at the detection point 2 is abnormal, the vehicle control device 30 at the vehicle-mounted terminal terminates the dc charging process, and when the temperature detection module 40 detects that the charging temperature is lower than the temperature threshold, control the switch module to close each branch, and resume the normal dc charging process.
The following describes in detail a schematic diagram of a control flow of the charge switching device when the charge temperature is too high according to an embodiment of the present invention with reference to fig. 4, wherein specific steps of the control flow are as follows:
step S11, start.
Step S12, judging whether the charging temperature exceeds a temperature threshold, if so, executing step S13; if not, go to step S14.
Step S13, the branch where the identification resistor R5 or R3 is located is cut off, and the signal of the detection point 3 is abnormal.
Step S14, the charging circuit normally performs a charging process.
And S15, cutting off the branches of the resistors R3 and R5, and detecting that the signal of the point 3 is abnormal.
And S16, cutting off the CP detection circuit, and monitoring abnormal signals of the point 2.
Step S17, the charging process is terminated.
In summary, according to the charging switching device 1 of the embodiment of the present invention, by setting the temperature detection module 40 and the switch module 50 in the charging switching device 1, when the vehicle performs dc charging, the dc side connection port 10 of the charging switching device 1 is connected with the dc charging device in a matching manner, the ac side connection port 20 is connected with the vehicle-mounted ac charging socket in a matching manner, the dc charging device charges the vehicle-mounted terminal through the charging switching device 1, in the dc charging process, the temperature detection module 40 detects the charging temperature in real time, the switch module 50 is connected with the temperature detection module 40, and when the temperature detection module 40 detects that the charging temperature exceeds the temperature threshold value, the switch module 50 controls at least one of the connection confirmation branch, the connection control confirmation branch and the branch where the identification resistor R5 is located to be disconnected, and the connection confirmation or connection control confirmation link in the dc charging process is interrupted, so that the vehicle-mounted terminal cannot normally receive the dc charging signal, thereby interrupting the dc charging process of the vehicle, realizing protection of the dc charging process, and improving the user experience.
A vehicle according to an embodiment of the second aspect of the present invention is described below with reference to the accompanying drawings.
Fig. 5 is a block diagram of a vehicle according to a second aspect of the present invention, and as shown in fig. 5, a block diagram 60 of the second aspect of the present invention includes an in-vehicle ac charging outlet 61 and a vehicle control device 30.
Wherein the in-vehicle ac charging receptacle 61 is for matching with the charging adapter 1 mentioned in the above embodiment, the in-vehicle ac charging receptacle 61 includes a third connection confirmation terminal CC and a third connection control confirmation terminal CP; the vehicle control device 30 is connected to the third connection confirmation terminal CC to acquire the first detection signal, and the vehicle control device 30 is connected to the third connection control confirmation terminal CP to acquire the second detection signal; the vehicle control device 30 is configured to control the dc charge state based on the first detection signal and the second detection signal.
According to the vehicle 60 of the embodiment of the present invention, the vehicle-mounted ac charging socket 61 is matched with the charging switching device 1 mentioned in the above embodiment to implement dc charging of the vehicle, the temperature detection module 40 detects the charging temperature in real time, the switch module 50 is connected with the temperature detection module 40, and when the temperature detection module 40 detects that the charging temperature exceeds the temperature threshold, the switch module 50 controls at least one of the connection confirmation branch, the connection control confirmation branch and the branch where the identification resistor R5 is located to be disconnected, and the connection confirmation or the connection control confirmation link in the dc charging process is interrupted, so that the vehicle-mounted terminal cannot normally receive the dc charging signal, thereby interrupting the dc charging process of the vehicle and implementing protection of dc charging.
A dc charge control method according to an embodiment of the third aspect of the present invention is described below with reference to the drawings.
Fig. 6 is a flowchart of a dc charging control method according to an embodiment of the third aspect of the present invention, and as shown in fig. 6, the dc charging control method according to the embodiment of the third aspect of the present invention at least includes step S22 and step S23.
Step S22, acquiring a first detection signal and a second detection signal.
In the embodiment, when the vehicle is charged in a direct current, the charging switching device 1 is used for charging the vehicle in a direct current, the vehicle control device obtains the first detection signal through the connection confirmation terminal of the vehicle-mounted terminal, and obtains the second detection signal through the connection control confirmation terminal.
Step S23, controlling the direct current charging state according to the first detection signal and the second detection signal.
In an embodiment, the vehicle control device determines whether the detection point signal is abnormal according to the received first detection signal and second detection signal, and controls the direct current charging flow according to the detection signal.
According to the direct current charging control method provided by the embodiment of the invention, the protection of the direct current charging process is realized by acquiring the first detection signal and the second detection signal, and when the charging temperature is too high, the charging flow can be timely interrupted, so that the situation that the temperature of the direct current charging equipment and the charging switching device 1 is continuously increased to cause short circuit is avoided, and the charging safety is improved.
In some embodiments, controlling the dc charge state according to the first detection signal and the second detection signal includes any one of the first detection signal and the second detection signal being abnormal, terminating the dc charge; or, the first detection signal and the second detection signal are normal, the vehicle is confirmed to be connected with the charging switching device and the direct current charging equipment, direct current charging is started, in the direct current charging process, the temperature detection module detects the charging temperature in real time, and when the temperature detection module detects that the charging temperature exceeds the temperature threshold value, at least one of the connection confirmation branch, the connection control confirmation branch and the branch where the identification resistor is located is controlled to be disconnected, and the connection confirmation or the connection control confirmation link in the direct current charging process is interrupted, so that the protection of the direct current charging process is realized.
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 in a matching way and comprises a direct-current power supply positive terminal, a direct-current power supply negative terminal, a first communication terminal, a second communication terminal, a first grounding terminal, a first connection confirmation terminal and a first connection control confirmation terminal;
an ac side connection port adapted to be matingly 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 ac-to-phase terminal, a third ac-to-phase terminal, a second ground terminal, a second connection confirmation 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 terminal, the first communication terminal is electrically connected with the second alternating current terminal, the second communication terminal is electrically connected with the third alternating current terminal, the first grounding terminal is electrically connected with the second grounding terminal, the first connection confirmation terminal is connected with the second connection confirmation terminal to form a connection confirmation branch, and the first connection control confirmation terminal is electrically connected with the second connection control confirmation terminal to form a connection control confirmation branch;
the first end of the identification resistor is connected to the connecting line of the first grounding terminal and the second grounding terminal, and the second end of the identification resistor is connected to the connecting line of the first connection confirmation terminal and the second connection confirmation terminal;
the temperature detection module is used for detecting the charging temperature;
and the switch module is connected with the temperature detection module and is used for controlling at least one branch circuit among the connection confirmation branch circuit, the connection control confirmation branch circuit and the branch circuit where the identification resistor is positioned to be disconnected when the charging temperature exceeds a temperature threshold value.
2. The charge switching device according to claim 1, wherein the temperature detection module is provided at an end of the positive terminal of the direct current power supply.
3. The charging adapter of claim 1, wherein the temperature detection module is disposed at an end of the negative terminal of the dc power source.
4. The charge switching device according to claim 1, wherein,
a first node is arranged on a connecting line of the first connection confirmation terminal and the second connection confirmation terminal;
the switch module includes:
the first end of the first switch is connected with the second end of the identification resistor, and the second end of the first switch is connected with the first node;
and the control unit is connected with the temperature detection module and used for controlling the first switch to be disconnected when the charging temperature exceeds the temperature threshold value.
5. The charge transfer apparatus of claim 4 wherein the switch module further comprises:
a second switch, a first end of which is connected with the first connection confirmation terminal, and a second end of which is connected with the first node;
the control unit is further used for controlling the first switch to be closed and controlling the second switch to be opened when the charging temperature exceeds the temperature threshold.
6. The charge transfer apparatus of claim 5, wherein the switch module further comprises:
a third switch, a first end of which is connected to the first node, and a second end of which is connected to the second connection confirmation terminal;
the control unit is further used for controlling the first switch and the second switch to be closed and controlling the third switch to be opened when the charging temperature exceeds the temperature threshold.
7. The charge transfer apparatus of claim 6, wherein the switch module further comprises:
a fourth switch, a first end of which is connected with the first connection control confirmation terminal, and a second end of which is connected with the second connection control confirmation terminal;
the control unit is further configured to control the fourth switch to be turned off when the charging temperature exceeds the temperature threshold.
8. A vehicle, characterized by comprising:
an in-vehicle alternating-current charging socket for matching with the charging adapter of any one of claims 1 to 7, the in-vehicle alternating-current charging socket including a third connection confirmation terminal and a third connection control confirmation terminal;
a vehicle control device connected to the third connection confirmation terminal to acquire a first detection signal, the vehicle control device connected to the third connection control confirmation terminal to acquire a second detection signal;
the vehicle control device is used for controlling the direct current charging state according to the first detection signal and the second detection signal.
9. A direct current charging control method for the vehicle according to claim 8, comprising:
acquiring a first detection signal and a second detection signal;
and controlling the direct current charging state according to the first detection signal and the second detection signal.
10. The direct current charging control method according to claim 9, wherein controlling the direct current charging state based on the first detection signal and the second detection signal comprises:
any one of the first detection signal and the second detection signal is abnormal, and direct current charging is terminated;
or, the first detection signal and the second detection signal are normal, the vehicle is confirmed to be connected with the charging switching device and the direct-current charging equipment, and the direct-current charging is started.
CN202010617187.5A 2020-06-30 2020-06-30 Charging switching device, vehicle and direct-current charging control method Active CN113858992B (en)

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