CN114720789A - Direct-current charging interface external discharge connection equipment, vehicle and external discharge method - Google Patents
Direct-current charging interface external discharge connection equipment, vehicle and external discharge method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The invention discloses a direct-current charging interface external discharge connecting device, a vehicle and an external discharge method. The external discharge connecting device comprises a body and a connecting plug; the connecting plug is used for being connected with a direct current charging socket of a vehicle; the body is respectively provided with an output socket, an inverter, an external discharge switch and an external discharge controller; the output socket is used for being connected with electric equipment; the inverter is connected with the output socket; the external discharge switch is respectively connected with the connecting plug and the inverter; the external discharge controller is respectively connected with the inverter, the external discharge switch and the connecting plug and is used for: after a discharging permission instruction of the vehicle is received through the connecting plug, the external discharging switch is controlled to be closed, and the inverter is controlled to convert a direct-current power supply of a power battery system on the vehicle into an alternating-current power supply to be output to the output socket. The invention changes the connection interface from the AC charging port to the DC charging port, improves the adaptability of the external discharging function on the electric vehicle and is beneficial to reducing the vehicle cost.
Description
Technical Field
The invention relates to the technical field of automobile control, in particular to a direct-current charging interface external discharge connecting device, a vehicle and a direct-current charging interface external discharge method.
Background
At present, the external discharge function of the electric automobile is developed based on a vehicle-mounted bidirectional power supply system, and a direct current power supply of the automobile is inverted into 220V AC through a specific connecting device, so that the use scene of the electric automobile is enriched. However, the vehicle is equipped with a bidirectional power supply system, which increases the cost of the vehicle, and the connection interface is usually an ac charging interface, which is not favorable for the function to be popularized in the vehicle type with only a dc charging interface or without a vehicle-mounted bidirectional charger.
Disclosure of Invention
The invention aims to provide a direct-current charging interface external discharge connection device, a vehicle and a direct-current charging interface external discharge method, which can solve the problem that the existing external discharge function is generally developed based on a vehicle-mounted bidirectional charger, so that the vehicle cost is increased, and the connection interface is usually an alternating-current charging interface, which are not beneficial to popularization of the function on vehicle types with only a direct-current charging interface or without the vehicle-mounted bidirectional charger.
The embodiment of the invention provides a direct-current charging interface external discharge connecting device, which comprises a body and a connecting plug, wherein the body is provided with a first connecting hole and a second connecting hole;
the connecting plug is used for being connected with a direct current charging socket of a vehicle;
the body is respectively provided with an output socket, an inverter, an external discharge switch and an external discharge controller;
the output socket is used for being connected with electric equipment; the inverter is connected with the output socket; the external discharge switch is respectively connected with the connecting plug and the inverter; the external discharge controller is respectively connected with the inverter, the external discharge switch and the connecting plug, and is used for:
after a discharging permission instruction of the vehicle is received through the connecting plug, the external discharging switch is controlled to be closed, and the inverter is controlled to convert a direct-current power supply of a power battery system on the vehicle into an alternating-current power supply to be output to the output socket.
In one embodiment, the positive power supply electrode of the connection plug is used for being connected with the positive power supply electrode of the direct-current charging socket, and the negative power supply electrode of the connection plug is used for being connected with the negative power supply electrode of the direct-current charging socket;
the communication positive end of the connecting plug is used for being connected with the communication positive end of the direct-current charging socket, and the communication negative end of the connecting plug is used for being connected with the communication negative end of the direct-current charging socket;
the first resistor of the connecting plug is used for being connected with the first configuration end of the direct current charging socket, and the second configuration end of the connecting plug is used for being connected with the second resistor of the direct current charging socket;
the identification connection positive end of the connecting plug is used for being connected with the identification connection positive end of the direct-current charging socket, and the identification connection negative end of the connecting plug is used for being connected with the identification connection negative end of the direct-current charging socket.
In one embodiment, the external discharge connection device further comprises a sensor, wherein the sensor is arranged on the output socket and is used for acquiring temperature information and humidity information of the output socket;
the external discharge controller is also used for monitoring whether the external discharge process is abnormal or not according to the temperature information and the humidity information acquired by the sensor.
In one embodiment, the external discharge connection device further includes an active protection circuit breaker, and the active protection circuit breaker is mounted on the cable between the connection plug and the body and used for disconnecting the connection between the external discharge connection device and the vehicle after a fault occurs in the external discharge process.
In one embodiment, the external discharging connection device further comprises a discharging key, a discharging display interface and an external power supply;
the discharging key is connected with the external discharging controller and used for receiving the input of discharging parameters; the discharge parameters comprise discharge duration and discharge electric quantity;
the discharge display interface is connected with the external discharge controller and is used for displaying discharge state information;
the external power supply is connected with the external discharge controller and used for supplying power to the external discharge controller.
An embodiment of the present invention further provides a vehicle, including:
a power battery system;
a human-computer interaction display system;
the direct current charging interface in any of the above embodiments is an external discharge connection device;
the direct current charging socket is used for being connected with the connecting plug of the external discharging connecting equipment; and
the vehicle controller is respectively connected with the power battery system, the human-computer interaction display system and the direct-current charging socket and is used for:
identifying whether the connecting plug is connected with the direct current charging socket or not by detecting voltage information on the direct current charging socket; sending a discharging permission instruction to the external discharging controller, and controlling a direct-current power supply of the power battery system to output to the external discharging connection equipment; and displaying the current external discharge information through the man-machine interaction display system.
In one embodiment, the vehicle further comprises a vehicle high-voltage contactor, and the vehicle controller is connected with the vehicle high-voltage contactor and is used for controlling the vehicle high-voltage contactor to be closed so as to control the energy output of the power battery system.
The embodiment of the invention also provides an external discharging method of a direct-current charging interface, which is applied to a vehicle in any one of the embodiments, and the method comprises the following steps:
the vehicle controller detects voltage information on the direct-current charging socket, sends a discharging permission instruction to the external discharging controller after recognizing that the connecting plug is connected with the direct-current charging socket, and controls a direct-current power supply of the power battery system to output to the external discharging connecting device;
and after receiving the discharge permission instruction through the connecting plug, the external discharge controller controls the external discharge switch to be closed, and controls the inverter to convert a direct-current power supply of the power battery system into an alternating-current power supply to be output to the output socket.
In a certain embodiment, the method further comprises:
the external discharge controller monitors whether the external discharge process is abnormal or not according to temperature information and humidity information collected by a sensor arranged on the output socket and sends monitoring information to the vehicle controller;
and the vehicle controller displays the current external discharge information and the monitoring information through the man-machine interaction display system.
In a certain embodiment, the method further comprises:
when the external discharge controller monitors that the external discharge process is abnormal, judging whether the fault reason is over-temperature alarm or not;
when the fault reason is judged not to be over-temperature alarm, the external discharge is finished;
when the fault reason is judged to be over-temperature alarm, further judging whether the current temperature reaches serious over-temperature;
if not, sending abnormal over-temperature information to the user equipment, and finishing external discharge;
if not, controlling the active protection circuit breaking device to actively break the connection between the connecting plug and the body so as to finish external discharge and send abnormal over-temperature information to the user equipment.
In one embodiment, before the step of controlling the external discharge switch to be closed after the external discharge controller receives the discharge allowing instruction through the connection plug, the method further includes:
self-checking the external discharge connection equipment and the vehicle to judge whether the external discharge connection equipment and the vehicle are normal or not;
if not, ending the external discharge function, and controlling a discharge display interface of the external discharge connection equipment and a human-computer interaction display system of the vehicle to display abnormal alarm information.
The direct-current charging interface external discharge connecting equipment, the vehicle and the direct-current charging interface external discharge method in the embodiment of the invention have the advantages that the connecting plug is directly connected with the direct-current charging socket of the vehicle, so that the conventional connecting interface is changed from an alternating-current charging interface into a direct-current charging interface, the adaptability of an external discharge function on the electric vehicle can be greatly improved, and the possibility of realizing external discharge is brought to some electric vehicles without a vehicle-mounted bidirectional charger; meanwhile, the external discharging function of the vehicle can be developed based on the old vehicle type which only has a direct-current charging interface or is not provided with the vehicle-mounted bidirectional charger instead of the existing vehicle-mounted bidirectional charger, so that the vehicle cost is reduced.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic connection diagram of an external discharge connection device and a vehicle of a dc charging interface according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of an external discharge connection device and a vehicle of a dc charging interface according to another embodiment of the present invention;
fig. 3 is a schematic flowchart of a method for discharging from the outside by using a dc charging interface according to an embodiment of the present invention;
fig. 4 is a schematic specific flowchart of a method for discharging from the outside by using a dc charging interface according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a connection between an external discharging connection device 100 and a vehicle 1000 according to a dc charging interface provided by an embodiment of the present invention. The external discharging connection device 100 with the direct-current charging interface provided by the embodiment of the invention comprises a body 10 and a connection plug 20.
The connection plug 20 is used to connect to the dc charging socket 400 of the vehicle 1000. The body 10 is provided with an output socket 30, an inverter 40, an external discharge switch 50, and an external discharge controller 60, respectively.
The outlet socket 30 is used for connecting to a consumer. The inverter 40 is connected to the output socket 30. The external discharge switch 50 is connected to the connection plug 20 and the inverter 40, respectively. The external discharge controller 60 is connected to the inverter 40, the external discharge switch 50, and the connection plug 20, respectively, and is configured to:
after receiving a discharge permission command of the vehicle 1000 through the connection plug 20, the external discharge switch 50 is controlled to be closed, and the inverter 40 is controlled to convert the direct-current power supply of the power battery system 200 on the vehicle 1000 into an alternating-current power supply and output the alternating-current power supply to the output socket 30.
The external discharge (V2L, Vehicle to Load) is to discharge the power battery of the electric Vehicle as the mobile power supply to the third party (outputting 220V 50Hz household alternating current), that is, to charge other loads.
In the embodiment of the present invention, the electric device is connected to the external discharge connection device 100 through the connection dc charging interface and the power battery system 200 of the vehicle 1000, so that the power battery system 200 of the vehicle 1000 can supply power to the electric device. Wherein, the electric equipment includes but is not limited to: electric lights, electric fans, electric barbecue grills, etc.
Specifically, the connection plug 20 is connected to the dc charging socket 400 of the vehicle 1000, and the electric device is connected to the output socket 30. After receiving the discharge permission instruction of the vehicle 1000, the external discharge controller 60 controls the external discharge switch 50 to be closed, so that the inverter 40 is electrically connected to the power battery system 200 of the vehicle 1000, and then controls the inverter 40 to convert the dc power of the power battery system 200 into the ac power, so that the electric equipment obtains the ac power from the output socket 30.
Referring to fig. 1, in one embodiment, the inverter 40 is a single-phase inverter 41, and the external discharge switch 50 includes an external discharge high-voltage contactor 51.
The single-phase inversion is that the converted alternating voltage is a single phase, namely AC 220V. Specifically, the output socket 30 corresponding to the single-phase inverter 41 has three insertion holes, which are respectively labeled as "N", "L", and "PE": l represents a fire line (marked with 'L' Live Wire) and is a red or brown line; n represents a blue or white line for a zero line (marked with a letter 'N' Null wire); PE denotes the line between the ground lines (marked with the letter 'E' Earth) alternating with yellow-green.
The external discharge high-voltage contactor 51 includes a pair of contact points K1 and K2, and the contact points K1 and K2 are respectively connected in series between the single-phase inverter 41 and the connection plug 20, and are both connected to the external discharge controller 60. The external discharge controller 60 controls the connection and disconnection of the contact points K1 and K2, so that power supply and distribution of the power battery system 200 are realized, and related protection for the external discharge connection device 100 and the vehicle 1000 is realized.
Therefore, compared with the prior art, the external discharging connection device 100 of the dc charging interface according to the embodiment of the present invention directly connects the connection plug 20 to the dc charging socket 400 of the vehicle 1000, so that the existing connection interface is changed from an ac charging interface to a dc charging interface, which can greatly improve the adaptability of the external discharging function on the electric vehicle, and bring the possibility of realizing external discharging for some electric vehicles without a vehicle-mounted bidirectional charger; meanwhile, the external discharging function of the vehicle 1000 may be developed based on an old vehicle type having only a dc charging interface or not configured with a vehicle-mounted bidirectional charger instead of the existing vehicle-mounted bidirectional charger, thereby reducing the vehicle cost.
Referring to fig. 1, in one embodiment, the connection plug 20 and the dc charging socket 400 of the vehicle 1000 are connected in the following manner:
the positive power supply DC + of the connection plug 20 is used for connecting with the positive power supply DC + of the DC charging socket 400, and the negative power supply DC-of the connection plug 20 is used for connecting with the negative power supply DC-of the DC charging socket 400.
The communication positive terminal S + of the connection plug 20 is used for connecting with the communication positive terminal S + of the dc charging socket 400, and the communication negative terminal S-of the connection plug 20 is used for connecting with the communication negative terminal S-of the dc charging socket 400.
The first resistor R4 of the connector plug 20 is used to connect to the first configuration terminal CC1 of the dc charging socket 400, and the second configuration terminal CC2 of the connector plug 20 is used to connect to the second resistor R3 of the dc charging socket 400.
The identification connection positive terminal a + of the connection plug 20 is used for being connected with the identification connection positive terminal a + of the dc charging socket 400, and the identification connection negative terminal a-of the connection plug 20 is used for being connected with the identification connection negative terminal a-of the dc charging socket 400.
In the embodiment of the present invention, DC + of the DC charging socket 400 is connected to DC + of the connection plug 20, and DC-of the DC charging socket 400 is connected to DC-of the connection plug 20 for high voltage transmission.
The S + of the DC charging socket 400 is connected with the S + of the connecting plug 20, and the S-of the DC charging socket 400 is connected with the S-of the connecting plug 20 for CAN signal transmission. The communication positive terminal S + and the communication negative terminal S-are networks used as power batteries to communicate with the externally connected discharging device 100.
The resistor R3 of the dc charging socket 400 is connected to the CC2 of the connection plug 20, and the CC1 of the dc charging socket 400 is connected to the resistor R4 of the connection plug 20, so as to recognize whether the dc charging socket 400 and the connection plug 20 are normally connected. Wherein, CC1 and CC2 are used for transmitting Configuration signals.
The a + of the dc charging socket 400 is connected to the a + of the connection plug 20, and the a-of the dc charging socket 400 is connected to the a-of the connection plug 20, and is configured to wake up the vehicle 1000 and identify whether the connected external device is the external discharge connection device 100.
In actual operation, the dc charging socket 400 determines whether the external discharge connection device 100 and the vehicle 1000 are normally connected by determining whether the voltage between a + and a-is 6V. If the voltage between the A + and the A-is 6V, it indicates that the connection between the external discharge connection device 100 and the vehicle 1000 is normal; if the voltage between a + and a-is not 6V, it indicates that the connection between the external discharge connection device 100 and the vehicle 1000 is abnormal, and the vehicle 1000 does not perform external discharge, so that the external discharge connection device 100 and the vehicle 1000 are not damaged.
Therefore, compared with the prior art, the embodiment of the invention increases the voltage signal, CAN identify the connection state of the external discharge connection device 100 and the vehicle 1000, and realizes real-time CAN communication between the external discharge connection device 100 and the vehicle 1000 through the communication positive terminal S + and the communication negative terminal S-, thereby improving the safety of the external discharge process.
Referring to fig. 2, fig. 2 is a schematic connection diagram of a dc charging interface external discharge connection device 100 and a vehicle 1000 according to another embodiment of the present invention.
In one embodiment, the external discharge connection apparatus 100 further includes a sensor 70, and the sensor 70 is disposed on the output socket 30 and is used for collecting temperature information and humidity information of the output socket 30. The external discharge controller 60 is further configured to monitor whether the external discharge process is abnormal according to the temperature information and the humidity information collected by the sensor 70.
Most of V2L (Vehicle to Load) functions and V2V (Vehicle to Vehicle mutual charging) functions of the conventional electric Vehicle are designed based on a national standard alternating current charging control circuit, so that signal interaction between the power strip and the Vehicle is lacked, and the abnormity of some power strips cannot be monitored in real time.
In order to solve the above problem, in the embodiment of the present invention, the sensor 70 is disposed on the output socket 30, the sensor 70 collects temperature information and humidity information of the output socket 30, the external discharge controller 60 monitors whether an external discharge process is abnormal according to the temperature information and humidity information collected by the sensor 70, and then sends the monitoring information to the vehicle 1000 through CAN communication.
Therefore, the embodiment of the present invention, through the real-time CAN communication between the external discharge connection device 100 and the vehicle 1000, CAN monitor the state of the external discharge connection device 100 in real time, and alarm an abnormality, and particularly, when the external discharge connection device 100 catches fire due to an extreme over-temperature abnormality, CAN disconnect the device 100 from the vehicle 1000, thereby reducing the risk of the vehicle 1000 being burned.
Referring to fig. 2, in one embodiment, the external discharge connection device 100 further includes an active protection breaker 80, and the active protection breaker 80 is mounted on a cable between the connection plug 20 and the body 10 and used for disconnecting the external discharge connection device 100 from the vehicle 1000 after a fault occurs in the external discharge process.
In the embodiment of the present invention, the active protection breaker 80 is mounted on the cable between the connection plug 20 and the body 10, and is used for disconnecting the external discharge connection device 100 from the vehicle 1000 after a high-temperature ignition fault occurs to the external discharge connection device 100, so as to avoid further damage to the vehicle 1000.
Referring to fig. 2, in an embodiment, the external discharging connection device 100 further includes a discharging button 90, a discharging display interface 110, and an external power source 120. The discharging key 90 is connected to the external discharging controller 60 and is configured to receive input of discharging parameters; the discharge parameters include discharge duration and discharge capacity. The discharge display interface 110 is connected to the external discharge controller 60 and is used to display discharge state information. The external power source 120 is connected to the external discharge controller 60 and is configured to supply power to the external discharge controller 60.
The external discharge controller 60 according to the embodiment of the present invention is connected to the external power source 120, and the external power source 120 is used for providing a basic working power source.
In one embodiment, the external power source 120 is an external 12V power source, and the external 12V power source may be connected to a cigarette lighter or other 12V power source.
The external discharge controller 60 is connected to the discharge key 90 for identifying the discharge operation intention of the user, and meanwhile, the user can set the discharge parameters (such as discharge duration, discharge capacity, etc.) conveniently.
In addition, the external discharge controller 60 is connected to the discharge display interface 110, and is configured to display discharge status information to a user, for example, to light up the discharge display interface 110 of the external discharge connection device 100 to indicate that the display system is normal, and for example, after a high-temperature ignition fault occurs to the external discharge connection device 100, the discharge display interface 110 displays an abnormal alarm message.
In order to better understand the inventive concept of the present invention, please refer to fig. 4 and the above-mentioned embodiment, in the practical use process, the operation flow of the external discharging connection device 100 of the embodiment of the present invention when operating is as follows:
(1) firstly, an external 12V power supply is connected with a cigarette lighter of a vehicle 1000 or an external 12V power supply in other forms;
(2) the discharge state, such as discharge duration, discharge capacity, etc., is set by the discharge key 90;
(3) the connecting plug 20 is connected with the direct current charging socket 400, and the direct current charging socket 400 identifies that the connecting device is the direct current charging interface external discharging connecting device 100 in the embodiment of the invention by detecting that the voltage between A + and A-is 6V;
(4) discharge is initiated through the discharge button 90;
(5) after discharging, the external discharging high-voltage contactor 51 and the vehicle high-voltage contactor 600 of the vehicle 100 are closed, and the single-phase inverter 41 converts the direct-current power supply of the power battery system 200 into an alternating-current power supply and outputs the alternating-current power supply to the output socket 30;
(6) a user may connect a powered device to output receptacle 30;
(7) the sensor 70 collects temperature information and humidity information on the output socket 30 in real time, processes relevant information for the external discharge controller 60, displays the information to a user through the discharge display interface 110, and can give an alarm in time and end discharge if an abnormal condition occurs;
(8) when the discharging is normally finished, the discharging function can be finished after the setting of the discharging button 90.
Referring to fig. 2, a vehicle 1000 according to an embodiment of the present invention includes: the power battery system 200, the human-computer interaction display system 300, the external discharging connection device 100 of the direct current charging interface in any one of the above embodiments, the direct current charging socket 400 and the vehicle controller 500.
The dc charging socket 400 is used to connect with the connection plug 20 of the external discharge connection apparatus 100.
The vehicle controller 500 is respectively connected with the power battery system 200, the human-computer interaction display system 300 and the direct current charging socket 400, and is used for:
identifying whether the connection plug 20 is connected to the dc charging socket 400 by detecting voltage information on the dc charging socket 400; sending a discharge permission instruction to the external discharge controller 60, and controlling the dc power supply of the power battery system 200 to output to the external discharge connection device 100; and displaying the current external discharge information through the man-machine interaction display system 300.
The vehicle 1000 according to the embodiment of the present invention may be a pure electric vehicle or a hybrid electric vehicle.
Referring to fig. 2, in one embodiment, the vehicle 1000 further includes a vehicle high voltage contactor 600, and the vehicle controller 500 is connected to the vehicle high voltage contactor 600 and is configured to control the vehicle high voltage contactor 600 to close to control the energy output of the power battery system 200.
In the present embodiment, the vehicle high-voltage contactor 600 includes a pair of contact points K5 and K6, and the contact points K5 and K6 are respectively connected in series between the dc charging socket 400 and the power battery system 200, and are both connected to the vehicle controller 500. The vehicle controller 500 controls the connection and disconnection of the contact points K5 and K6, so that the power supply and distribution of the power battery system 200 to the outside and the related protection of the external discharge connection device 100 and the vehicle 1000 are realized.
Referring to fig. 3, fig. 3 is a schematic flow chart of a method for discharging from the outside by using a dc charging interface according to an embodiment of the present invention. The direct-current charging interface external discharging method provided by the embodiment of the invention is applied to the vehicle 1000 in any one of the embodiments, and comprises the following steps:
s10, the vehicle controller 500 detects the voltage information on the dc charging socket 400, and after the connection plug 20 is connected to the dc charging socket 400, sends a discharge permission instruction to the external discharge controller 60, and controls the dc power supply of the power battery system 200 to output to the external discharge connection device 100;
s20, after receiving the discharge permission command via the connection plug 20, the external discharge controller 60 controls the external discharge switch 50 to be closed, and controls the inverter 40 to convert the dc power of the power battery system 200 into ac power and output the ac power to the output socket 30.
In the embodiment of the present invention, the vehicle controller 500 identifies whether the current connection device is the external discharge connection device 100 of the dc charging interface in the embodiment of the present invention by detecting that the voltage between a + and a-on the dc charging socket 400 is 6V, and if so, sends a discharge permission instruction to the external discharge controller 60 to prepare the external discharge connection device 100 for external discharge, for example, the external discharge controller 60 controls the external discharge switch 50 to be closed. Meanwhile, the vehicle controller 500 controls the dc power of the power battery system 200 to be output to the external discharge connection apparatus 100, and the external discharge controller 60 controls the inverter 40 to convert the dc power of the power battery system 200 into the ac power to be output to the output socket 30. In this manner, power battery system 200 of vehicle 1000 can supply power to the electric device.
Therefore, compared with the prior art, the vehicle 1000 according to the embodiment of the invention changes the connection interface from the ac charging port to the dc charging port, so that the adaptability of the external discharge function on the electric vehicle can be greatly improved, and the possibility of realizing the external discharge is brought to some electric vehicles without a vehicle-mounted bidirectional charger. Meanwhile, the external discharging function of the vehicle 1000 may be developed based on an old vehicle type having only a dc charging interface or not configured with a vehicle-mounted bidirectional charger instead of the existing vehicle-mounted bidirectional charger, thereby reducing the vehicle cost.
Referring to fig. 4, fig. 4 is a schematic flowchart of a method for discharging from outside by using a dc charging interface according to another embodiment of the present invention. In one embodiment, the method further comprises the steps of:
s30, the external discharge controller 60 monitors whether the external discharge process is abnormal according to the temperature information and humidity information collected by the sensor 70 disposed on the output socket 30, and sends the monitoring information to the vehicle controller 500;
and S40, the vehicle controller 500 displays the current external discharge information and the monitoring information through the man-machine interaction display system 300.
The external discharge controller of the embodiment of the invention monitors whether the external discharge process is abnormal or not by arranging the temperature information and the humidity information of the output socket 30, which are acquired by the sensor 70, on the output socket 30, and then sends the monitoring information to the vehicle controller 500 through CAN communication, and further displays the current external discharge information and the monitoring information through the man-machine interaction display system 300, so that the man-machine interaction display system 300 displays abnormal alarm information after the external discharge connection device 100 has a high-temperature ignition fault.
Therefore, the embodiment of the present invention CAN monitor the state of the external discharge connection device 100 in real time and alarm an abnormality through the real-time CAN communication between the external discharge connection device 100 and the vehicle 1000, and particularly, when the external discharge connection device 100 catches fire due to an extreme over-temperature abnormality, the external discharge connection device 100 CAN be disconnected from the vehicle 1000, thereby reducing the risk of the vehicle 1000 being burned. Meanwhile, the CAN communication between the external discharge connection device 100 and the vehicle 1000 is added, the man-machine interaction display system 300 of the vehicle 1000 is optimized, and the vehicle 1000 CAN give an alarm for abnormality in real time.
Referring to fig. 4, in one embodiment, the method further includes the following steps:
s50, when the external discharge controller 60 monitors that the external discharge process is abnormal, judging whether the fault reason is over-temperature alarm;
s51, when the fault reason is judged not to be over-temperature alarm, the external discharge is finished;
s52, when judging that the fault cause is over-temperature alarm, further judging whether the current temperature reaches serious over-temperature;
s521, if not, sending abnormal over-temperature information to the user equipment, and finishing external discharge;
and S522, if not, controlling the active protection circuit-breaking device 80 to actively disconnect the connection plug 20 and the body 10 so as to end external discharge and send abnormal over-temperature information to the user equipment.
In the embodiment of the present invention, the external discharge controller 60 monitors whether an abnormality occurs in the external discharge process in real time. If an abnormality occurs and the failure cause is not an over-temperature alarm, the current external discharge function is still ended, so as to ensure the safety of the external discharge connection device 100 and the vehicle 1000. If an abnormality occurs and the cause of the failure is an over-temperature alarm, it is necessary to further determine whether the current temperature has reached a serious over-temperature, and if so, the connection between the external discharge connection device 100 and the vehicle 1000 needs to be immediately disconnected. In one embodiment, the active protection circuit breaker 80 is controlled to actively disconnect the cable between the connection plug 20 and the body 10 to stop the external discharge and alert the user that the current abnormal over-temperature needs to be immediately handled. If the current temperature does not reach the serious over-temperature, the current external discharging function is still ended, so that the safety of the external discharging connection device 100 and the vehicle 1000 is ensured, and a user is reminded that the current abnormal over-temperature needs to be immediately processed.
Referring to fig. 4, in an embodiment, before the external discharge controller 60 controls the external discharge switch 50 to close after receiving the discharge enable command through the connection plug 20 at step S20, the method further includes the following steps:
s60, performing self-test on the external discharge connection equipment 100 and the vehicle 1000 to judge whether the external discharge connection equipment 100 and the vehicle 1000 are normal;
and S61, if not, ending the external discharge function, and controlling the discharge display interface 110 of the external discharge connection equipment 100 and the man-machine interaction display system 300 of the vehicle 1000 to display abnormal alarm information.
In the embodiment of the present invention, if it is determined that the external discharge connection device 100 or the vehicle 1000 is abnormal after the self-fault is inspected, the external discharge is performed in step S20.
If the external discharge connection device 100 or the vehicle 1000 is found to be abnormal after the self fault is inspected, the external discharge function is ended, and the discharge display interface 110 of the external discharge connection device 100 and the human-computer interaction display system 300 of the vehicle 1000 are controlled to display abnormal alarm information.
Thus, the external discharge connection device 100 and the vehicle 1000 in the embodiment of the present invention eliminate the abnormality through a self-test manner, and improve the safety of the external discharge connection device 100 and the vehicle 1000.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the computer program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (11)
1. A direct current charging interface external discharge connection device is characterized by comprising a body and a connection plug;
the connecting plug is used for being connected with a direct current charging socket of a vehicle;
the body is respectively provided with an output socket, an inverter, an external discharge switch and an external discharge controller;
the output socket is used for being connected with electric equipment; the inverter is connected with the output socket; the external discharge switch is respectively connected with the connecting plug and the inverter; the external discharge controller is respectively connected with the inverter, the external discharge switch and the connecting plug, and is used for:
after a discharging permission instruction of the vehicle is received through the connecting plug, the external discharging switch is controlled to be closed, and the inverter is controlled to convert a direct-current power supply of a power battery system on the vehicle into an alternating-current power supply to be output to the output socket.
2. The direct current charging interface external discharge connection device as claimed in claim 1,
the power supply positive electrode of the connecting plug is used for being connected with the power supply positive electrode of the direct-current charging socket, and the power supply negative electrode of the connecting plug is used for being connected with the power supply negative electrode of the direct-current charging socket;
the communication positive end of the connecting plug is used for being connected with the communication positive end of the direct-current charging socket, and the communication negative end of the connecting plug is used for being connected with the communication negative end of the direct-current charging socket;
the first resistor of the connecting plug is used for being connected with the first configuration end of the direct current charging socket, and the second configuration end of the connecting plug is used for being connected with the second resistor of the direct current charging socket;
the identification connection positive end of the connecting plug is used for being connected with the identification connection positive end of the direct-current charging socket, and the identification connection negative end of the connecting plug is used for being connected with the identification connection negative end of the direct-current charging socket.
3. The direct-current charging interface external discharge connection device as claimed in claim 1, wherein the external discharge connection device further comprises a sensor, the sensor is disposed on the output socket and is configured to collect temperature information and humidity information of the output socket;
the external discharge controller is also used for monitoring whether the external discharge process is abnormal or not according to the temperature information and the humidity information acquired by the sensor.
4. The direct-current charging interface external discharge connection device according to claim 1, further comprising an active protection breaker device, wherein the active protection breaker device is mounted on a cable between the connection plug and the body and is configured to disconnect the external discharge connection device from the vehicle after a fault occurs during an external discharge process.
5. The direct-current charging interface external discharge connection device according to any one of claims 1 to 4, wherein the external discharge connection device further comprises a discharge key, a discharge display interface and an external power supply;
the discharging key is connected with the external discharging controller and used for receiving the input of discharging parameters; the discharge parameters comprise discharge duration and discharge electric quantity;
the discharge display interface is connected with the external discharge controller and is used for displaying discharge state information;
the external power supply is connected with the external discharge controller and used for supplying power to the external discharge controller.
6. A vehicle, characterized by comprising:
a power battery system;
a human-computer interaction display system;
the direct current charging interface external discharge connection device according to any one of claims 1 to 5;
the direct current charging socket is used for being connected with a connecting plug of the external discharging connecting equipment; and
the vehicle controller is respectively connected with the power battery system, the human-computer interaction display system and the direct-current charging socket and is used for:
identifying whether the connecting plug is connected with the direct current charging socket or not by detecting voltage information on the direct current charging socket; sending a discharging permission instruction to the external discharging controller, and controlling a direct-current power supply of the power battery system to output to the external discharging connection equipment; and displaying the current external discharge information through the man-machine interaction display system.
7. The vehicle of claim 6, further comprising a vehicle high voltage contactor, wherein the vehicle controller is coupled to the vehicle high voltage contactor and is configured to control the vehicle high voltage contactor to close to control the energy output of the power battery system.
8. A direct current charging interface external discharge method is applied to the vehicle according to claim 6 or 7, and the method comprises the following steps:
the vehicle controller detects voltage information on the direct-current charging socket, sends a discharging permission instruction to the external discharging controller after recognizing that the connecting plug is connected with the direct-current charging socket, and controls a direct-current power supply of the power battery system to output to the external discharging connecting device;
and after receiving the discharge permission instruction through the connecting plug, the external discharge controller controls the external discharge switch to be closed, and controls the inverter to convert a direct-current power supply of the power battery system into an alternating-current power supply to be output to the output socket.
9. The external discharging method of the DC charging interface of claim 8, further comprising:
the external discharge controller monitors whether the external discharge process is abnormal or not according to temperature information and humidity information acquired by a sensor arranged on the output socket and sends monitoring information to the vehicle controller;
and the vehicle controller displays the current external discharge information and the monitoring information through the man-machine interaction display system.
10. The external discharging method of the dc charging interface of claim 9, further comprising:
when the external discharge controller monitors that the external discharge process is abnormal, judging whether the fault reason is over-temperature alarm or not;
when the fault reason is judged not to be over-temperature alarm, the external discharge is finished;
when the fault reason is judged to be over-temperature alarm, further judging whether the current temperature reaches serious over-temperature;
if not, sending abnormal over-temperature information to the user equipment, and finishing external discharge;
if not, controlling the active protection circuit breaking device to actively break the connection between the connecting plug and the body so as to finish external discharge and send abnormal over-temperature information to the user equipment.
11. The external discharging method of the dc charging interface of claim 9, wherein before the step of controlling the external discharging switch to be closed by the external discharging controller after receiving the discharging permission command through the connection plug, the method further comprises:
self-checking the external discharge connection equipment and the vehicle to judge whether the external discharge connection equipment and the vehicle are normal or not;
if not, ending the external discharge function, and controlling a discharge display interface of the external discharge connection equipment and a human-computer interaction display system of the vehicle to display abnormal alarm information.
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| CN202110011539.7A CN114720789A (en) | 2021-01-05 | 2021-01-05 | Direct-current charging interface external discharge connection equipment, vehicle and external discharge method |
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| CN202110011539.7A CN114720789A (en) | 2021-01-05 | 2021-01-05 | Direct-current charging interface external discharge connection equipment, vehicle and external discharge method |
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