Holding integrated alternating current charging and discharging device and working method thereof

Abstract

The invention discloses a holding integrated alternating current charging and discharging device and a working method thereof, and belongs to the technical field of new energy automobiles, the device comprises a gun head and accessories, and the accessories comprise a plug in adaptive connection with the gun head, and an adapter plug, a socket, a V2L power strip, a V2V power taking gun and a wall box in adaptive connection with the plug; the gun head and the accessory are provided with power lines and connecting contacts thereof, the gun head, the V2L power strip and the V2V power taking gun are provided with CC lines and connecting contacts thereof, resistors are connected in series between the CC lines and the ground wire, and one side of the resistor of the gun head is further connected in series with an SC switch. The working method comprises the steps that if the plug is not connected to a power supply, the gun head is connected to a target vehicle, the target vehicle detects the resistance value of the matched resistor through the CC line so as to enter a V2L mode, a V2V mode or a semi-connection state, after the plug is connected to the power supply in the semi-connection state, the SC switch is closed, and the charging mode is entered. According to the invention, the functions are rich, the cost is reduced, and the market competitiveness of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a fixed-integrated AC charging and discharging device and a working method thereof. Background Art

[0002] In the field of charging and discharging equipment, such as new energy vehicles, integrated charging and discharging technology is currently in the development and improvement stage, with a high level of technical expertise and broad application prospects. Taking new energy vehicles as an example, integrated charging and discharging technology means that new energy vehicles can not only charge from the power grid but also reverse power to external loads or the power grid when they need power, thus enabling new energy vehicles to function like "mobile power banks." The application of this integrated charging and discharging technology is particularly important when outdoor electrical equipment requires power or when other electric vehicles need to be charged in an emergency but no power module is available. It not only helps improve the efficiency of new energy vehicles but also supports the power grid during peak power demand periods, alleviating power pressure.

[0003] At present, new energy AC charging and discharging equipment generally has four forms: a) Mode 2, i.e., a portable charger, is generally equipped with a 10A or 16A plug for convenient travel use; b) AC pile mode, i.e., an AC fixed charger, generally requires a fixed installation and cannot be moved, and supports a maximum charging current of 32A; c) V2L mode, i.e., a new energy vehicle external discharge mode (AC 220V), generally supports 16A or 32A discharge; d) V2V mode, i.e., vehicle-to-vehicle charging, generally requires the new energy vehicle's V2L discharge equipment to be used in conjunction with a Mode 2 charger.

[0004] The traditional integrated charging and discharging solution has the following problems: 1) Single working mode: Traditional new energy vehicle charging and discharging equipment can only work in one mode. For the integrated charging and discharging products on the market, they only support two modes, lack an effective multi-mode management mechanism, and have poor flexibility and scalability. 2) Poor convenience: New energy vehicle owners generally install fixed AC piles. When they need to charge for long distances or when going out, it is not convenient. They need to purchase additional mode 2 chargers, V2L dischargers and other equipment. V2V charging is generally achieved by combining V2L equipment with mode 2 equipment. 3) High cost: For users, new energy vehicles need to be equipped with three types of equipment: charging piles, mode 2, and V2L, which is relatively expensive. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a fixed-integrated AC charging and discharging device and a working method thereof, so as to solve the technical problems of the traditional integrated charging and discharging solution having a single working mode, poor convenience and high cost.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In the first aspect, the present invention provides an integrated AC charging and discharging device, including a gun head and accessories, the accessories including a plug adapted to be connected to the gun head and a conversion plug, a socket, a V2L socket strip, a V2V power gun and a wall box adapted to be connected to the plug, the gun head and the accessories are all provided with power lines and their connection contacts, the gun head, the V2L socket strip, and the V2V power gun are all provided with CC lines and their connection contacts, a distribution resistor is connected in series between the CC line and the ground wire, and an SC switch is also connected in series on one side of the distribution resistor of the gun head.

[0007] Optionally, the gun head and the accessories are further provided with TS lines and connection contacts thereof; the accessories are all equipped with built-in temperature sensors or resistors of different resistance values, and the temperature sensors or resistors are connected to corresponding TS lines.

[0008] Optionally, the temperature sensor is assigned an independent ID number according to an internal ROM, or ID identification is performed through resistors of different resistance values.

[0009] Optionally, a first control board, a CP line and its connection contacts are also provided on the gun head. A first microprocessor and a CP circuit are provided on the first control board. The first microprocessor is connected to the control end of the SC switch, the input end of the CP circuit and the TS line on the gun head. The output end of the CP circuit is connected to the CP line.

[0010] Optionally, the wall box includes a box body and a box cover arranged on the box body, a relay is arranged on the power line of the wall box, a second control board and an opening and closing sensor are arranged in the box body, a second microprocessor is arranged on the second control board, the opening and closing sensor is arranged on one side of the box cover for detecting the opening and closing status of the box cover, the second microprocessor is connected to the opening and closing sensor and the control end of the relay, and the second microprocessor is used to control the opening and closing of the relay according to the opening and closing status of the box cover.

[0011] Optionally, the box body is further provided with an electromagnetic lock electrically connected to the second microprocessor, and the electromagnetic lock is used to lock the box cover in a closed state.

[0012] Optionally, a communication module electrically connected to the second microprocessor is further provided on the second control board, and the communication module is used for the second microprocessor to exchange information with the outside.

[0013] Optionally, a metering module electrically connected to the second microprocessor is further provided on the second control board. The metering module obtains the voltage and current on the incoming side of the socket through a voltage transformer and a current transformer, and calculates the power consumption.

[0014] In a second aspect, the present invention provides a working method applicable to the above-mentioned fixed-integrated AC charging and discharging device, comprising: If the plug is not connected to the power supply, the gun head is connected to the target vehicle, and the target vehicle detects the resistance of the resistor through the CC line; If the resistance of the resistor is the same as that of the V2L socket strip, the plug is connected to a V2L socket strip, and the V2L mode is entered; If the resistance of the resistor is the same as that of the V2V power gun, the plug is connected to a V2V power gun, and the V2V mode is entered; If the resistance value of the resistor is not the same as that of the V2L socket strip or V2V power gun, it will enter the semi-connected state and wait for the plug to be connected to the power supply; If the plug is connected to the power supply, the SC switch is closed, and the target vehicle detects the resistance of the distribution resistor through the CC line, which is the resistance of the distribution resistor of the gun head, and enters the charging mode.

[0015] Optionally, the plug is connected to a power source including: The plug is directly connected to the mains, or the plug is connected to the mains via a conversion plug, or the plug is connected to the mains via a wall box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a fixed, integrated AC charging and discharging device and operating method. By providing a charging head and various accessories, a single device can support Mode 2, V2L mode, V2V mode, and AC charging station mode, providing a variety of modes. Users can purchase and combine accessories and charging heads according to their needs, improving convenience and affordability. New energy vehicles typically operate in a wallbox (AC charging station) mode. Because the wallbox includes a security cover, it meets the common needs of AC charging station users. When traveling, the cover can be unlocked with authorization, and the charging cable can be removed and taken away, transforming to Mode 2, which allows for both charging and discharging, and also supports V2V charging in emergencies. Due to their different usage characteristics, the AC charging station and Mode 2 are difficult to achieve compatibility. This invention achieves both fixed and handheld operation through a single implementation mechanism. Removing the charging cable enables Mode 2, while reconnecting it transforms it into an AC charging station. Combined with these advantages, this invention offers multifunctionality while reducing costs and improving product market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a connection block diagram of the fixed-integrated AC charging and discharging device provided by an embodiment of the present invention; Figure 2 This is a connection block diagram of a gun head provided by an embodiment of the present invention; Figure 3 This is a connection block diagram of a wall box provided by an embodiment of the present invention; Figure 4 This is a connection diagram of the plug, conversion plug, socket, V2L socket strip, and V2V power gun provided by an embodiment of the present invention; Figure 5 is a schematic diagram of a working method of a fixed-integrated AC charging and discharging device provided by an embodiment of the present invention; Figure 6 This is a working flow chart of the fixed-integrated AC charging and discharging device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] Example 1:

[0020] like Figure 1 As shown, an embodiment of the present invention provides an integrated AC charging and discharging device, including a gun head and accessories. The accessories include a plug adapted to be connected to the gun head and a conversion plug, a socket, a V2L socket strip, a V2V power gun and a wall box adapted to be connected to the plug. The gun head and accessories are all provided with power lines (L line, N line, PE line) and their connection contacts. The gun head, V2L socket strip, and V2V power gun are all provided with CC lines and their connection contacts. A distribution resistor is connected in series between the CC line and the ground line, and an SC switch is also connected in series on one side of the distribution resistor of the gun head.

[0021] The embodiment of the present invention can realize a product device supporting mode two, V2L mode, V2V mode and AC pile mode. Mode two, that is, connecting the target vehicle through the gun head, connecting the plug to the power supply through the conversion plug, entering the charging mode, and charging the target vehicle. AC pile mode, that is, connecting the target vehicle through the gun head, connecting the plug to the power supply through the wall box, entering the charging mode, and charging the target vehicle. V2L mode, that is, connecting the target vehicle through the gun head, connecting the plug to the V2L socket strip, entering the discharge mode, and supplying power to the load on the V2L socket strip. V2V mode, that is, connecting the target vehicle through the gun head, connecting the plug to the V2V power gun, and the V2V power gun is connected to the discharge vehicle to charge the vehicle connected to the gun head.

[0022] Due to the existence of Mode 2, AC charging station mode, V2L mode, and V2V model, both the vehicle and the microprocessor controlling the steering circuit need to know the current operating mode in order to perform corresponding control. Specifically, in this embodiment, resistors RC1, RC2, and RC3 are connected in series between the CC line and the ground line of the gun head, V2L socket strip, and V2V power gun. The vehicle side sets different resistance values ​​for the resistors RC1, RC2, and RC3. By detecting the resistance values, it can identify and judge the connected accessories, and then determine the operating mode. The microprocessor controlling the steering circuit identifies the operating mode through the ID recognition function of the TS signal, thus solving the problem of traditional products with a single operating mode.

[0023] like Figure 2 As shown, the gun head is also provided with a first control board, a CP line and its connection contacts, a TS line and its connection contacts. The first control board is provided with a first microprocessor and a CP circuit. The first microprocessor is connected to the control end of the SC switch, the input end of the CP circuit and the TS line on the gun head. The output end of the CP circuit is connected to the CP line.

[0024] In electric vehicle charging systems, CC (Connection Confirmation) and CP (Control and Control) play crucial roles. The CC signal line electronically and mechanically indicates the status of the vehicle plug connected to the vehicle and / or the power plug connected to the power supply. When a successful connection is established, the vehicle side verifies the connection between the plug and the vehicle using CC resistance, confirming the operating mode and the maximum operating current of the working cable. CP, or Control and Confirmation, is primarily responsible for controlling the electric vehicle during the charging process. It establishes communication with the vehicle side through voltage levels and PWM, ensuring that the vehicle's OBC receives the correct charging instructions, thereby ensuring controllable charging.

[0025] As a further expansion, the first microprocessor can also be connected to functional modules such as current sampling module, voltage sampling module, sticky detection module, leakage current acquisition module, temperature sampling module, LED control module, grounding detection module, BT module and radio frequency cover opening module, thereby realizing rich functional applications. A relay is set on the power line, and the relay is connected to the first microprocessor to achieve power-off protection. The low-voltage electricity inside the gun head is taken from the power line, and the AC-DC module and LDO module convert the AC power into DC power such as 12V, 5V, 3.3V for use by the first microprocessor and other chips.

[0026] like Figure 3As shown, the wall box includes a box body and a box cover arranged on the box body, a relay is arranged on the power line of the wall box, a second control board and an opening and closing sensor are arranged in the box body, a second microprocessor is arranged on the second control board, the opening and closing sensor is arranged on one side of the box cover for detecting the opening and closing status of the box cover, the second microprocessor is connected to the opening and closing sensor and the control end of the relay, and the second microprocessor is used to control the opening and closing of the relay according to the opening and closing status of the box cover.

[0027] In the AC charging pile mode, the box cover opening and closing sensor can select a Hall sensor or a limit switch as needed. By detecting the position change of the box cover, the open and closed state of the box cover can be determined. In the open state, the second microprocessor disconnects the relay, and the wall box outputs power to the outside; when the plug is connected to the power line or the built-in socket in the wall box and the box cover is closed, the second microprocessor turns on the relay, and the wall box can output electrical energy to the outside.

[0028] To further enhance the wallbox's security and privacy, an electromagnetic lock electrically connected to the second microprocessor can be installed within the wallbox to lock the lid when closed. A communication module electrically connected to the second microprocessor is also installed on the second control board, enabling the second microprocessor to exchange information with the outside world. The communication module can be equipped with a variety of chips, including RFID, BT, and 4G. Users can use this communication module to authorize the electromagnetic lock to open or close.

[0029] As a further development, the second control board can also be equipped with a metering module electrically connected to the second microprocessor. This module uses voltage and current transformers to obtain the voltage and current on the incoming side of the socket and calculates power usage. A light board electrically connected to the second microprocessor can also be installed within the box to provide fill light in dark environments and display status, enhancing the user experience.

[0030] like Figure 4 As shown, the connection block diagram of the plug, conversion plug, socket, V2L socket strip, and V2V power gun.

[0031] The plug is used to connect to the gun head. Its input and output terminals are electrically connected through the power line and CC line, and can be connected to the contacts of the gun head, thus converting the connection method of the gun head to a standard plug connection. The plug generally adopts the 32A national standard plug. For convenience, it is generally equipped with a 10A or 16A conversion plug.

[0032] The V2L socket strip is used to connect to a plug or conversion plug. The V2L socket strip generally uses a 16A or 32A V2L socket strip. The connection of the gun head, plug, and socket strip can realize the working state of the V2L mode. The gun head draws power from the vehicle, transfers it to the plug, and then transfers it to the V2L socket strip for use by the load.

[0033] The V2V charging gun is used to connect to the plug. The connection and use of the gun head, plug and V2V charging gun can realize the working state of V2V mode. The V2V power gun draws electricity from the vehicle, transfers it to the plug, and then to the gun head to charge other vehicles.

[0034] like Figure 5 As shown, an embodiment of the present invention provides a working method applicable to the above-mentioned fixed-integrated AC charging and discharging device, comprising the following steps: If the plug is not connected to the power supply, the gun head is connected to the target vehicle, and the target vehicle detects the resistance of the resistor through the CC line; If the resistance of the resistor matches that of the V2L socket strip, the plug is connected to a V2L socket strip and the system enters V2L mode. If the resistance of the resistor is the same as that of the V2V power gun, the plug is connected to a V2V power gun, and the V2V mode is entered; If the resistance value of the resistor is not the same as that of the V2L socket strip or V2V power gun, it will enter the semi-connected state and wait for the plug to be connected to the power supply; If the plug is connected to the power supply, the SC switch is closed, and the target vehicle detects the resistance of the distribution resistor through the CC line, which is the resistance of the distribution resistor of the gun head, and enters the charging mode; Wait for the PWM wave of the CP line and determine the maximum charging current through the PWM wave for charging.

[0035] Since most vehicles do not have V2V function, in order to be compatible with different vehicles, the resistance values ​​of the V2L socket and the V2V power gun are set to the same value. When the V2V power gun is inserted into the power-collecting vehicle, the vehicle enters V2L mode for discharge, and the plug is inserted into the V2V power gun to collect power and charge the charged vehicle, at which time it enters V2V mode.

[0036] Among them, the plug access power supply includes: The plug is directly connected to the mains, or the plug is connected to the mains through a conversion plug, or the plug is connected to the mains through a wall box.

[0037] As a further extension, accessories can include built-in temperature sensors connected to corresponding TS cables. The TS contacts transmit the temperature sensor's signal to the first microprocessor on the gun head, enabling temperature monitoring of each component and immediate detection of overheating components, thereby improving work safety.

[0038] Although the embodiment of the present invention has already performed working mode identification through the resistors RC1, RC2, and RC3, it is also possible to assign an independent ID identification number to each component according to the internal ROM of the temperature sensor, and realize accurate identification of the component by reading the ROM through the first microprocessor.

[0039] Combined with the ID number, such as Figure 6 As shown, an embodiment of the present invention provides a workflow diagram applicable to the above-mentioned fixed integrated AC charging and discharging device: After the device is powered on, the MCU detects the power source through the voltage detection circuits on both sides of the internal main relay. If it comes from a vehicle, the first microprocessor reads the device ID and enters the corresponding 16A or 32A discharge mode; if the power source is the power supply end, the ID of each component is read. If only a 32A plug is detected, to prevent the user from using a non-standard socket, the system enters the 8A charging mode; when a 32A socket is detected, it enters the 32A charging mode; when a 10A or 16A adapter is detected, it enters the 10A or 16A charging mode; when a wall box component is detected, it enters the charging pile mode; when a V2V power gun is detected (the V2V power current is 32A in the figure), it enters the V2V charging mode.

[0040] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0041] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0042] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0043] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fixed integrated AC charging and discharging device, characterized in that: It includes a gun head and accessories, and the accessories include a plug that is adapted to be connected to the gun head and a conversion plug, socket, V2L socket strip, V2V power gun and wall box that are adapted to be connected to the plug. The gun head and the accessories are all provided with power lines and their connection contacts. The gun head, the V2L socket strip and the V2V power gun are all provided with CC lines and their connection contacts. A distribution resistor is connected in series between the CC line and the ground wire, and an SC switch is also connected in series on one side of the distribution resistor of the gun head.

2. The fixed-integrated AC charging and discharging device according to claim 1, characterized in that: The gun head and the accessories are also provided with TS lines and their connection contacts; the accessories are all equipped with built-in temperature sensors or resistors of different resistance values, and the temperature sensors or resistors are connected to the corresponding TS lines.

3. The fixed-integrated AC charging and discharging device according to claim 2, characterized in that: The temperature sensor is assigned an independent ID number according to the internal ROM, or ID identification is performed through resistors of different resistance values.

4. The fixed-integrated AC charging and discharging device according to claim 3, characterized in that: The gun head is also provided with a first control board, a CP line and its connection contacts. The first control board is provided with a first microprocessor and a CP circuit. The first microprocessor is connected to the control end of the SC switch, the input end of the CP circuit and the TS line on the gun head. The output end of the CP circuit is connected to the CP line.

5. The fixed-integrated AC charging and discharging device according to claim 1, characterized in that: The wall box includes a box body and a box cover arranged on the box body. A relay is arranged on the power line of the wall box. A second control board and an opening and closing sensor are arranged in the box body. A second microprocessor is arranged on the second control board. The opening and closing sensor is arranged on one side of the box cover for detecting the opening and closing status of the box cover. The second microprocessor is connected to the opening and closing sensor and the control end of the relay. The second microprocessor is used to control the opening and closing of the relay according to the opening and closing status of the box cover.

6. The fixed-integrated AC charging and discharging device according to claim 5, characterized in that: The box body is further provided with an electromagnetic lock electrically connected to the second microprocessor, and the electromagnetic lock is used to lock the box cover in a closed state.

7. The fixed-integrated AC charging and discharging device according to claim 5, characterized in that: The second control board is also provided with a communication module electrically connected to the second microprocessor, and the communication module is used for the second microprocessor to exchange information with the outside.

8. The fixed-integrated AC charging and discharging device according to claim 5, characterized in that: The second control board is also provided with a metering module electrically connected to the second microprocessor. The metering module obtains the voltage and current on the incoming side of the socket through a voltage transformer and a current transformer, and calculates the power consumption.

9. A working method applicable to the fixed-integrated AC charging and discharging device according to any one of claims 1 to 8, characterized in that: include: If the plug is not connected to the power supply, the gun head is connected to the target vehicle, and the target vehicle detects the resistance of the resistor through the CC line; If the resistance of the resistor is the same as that of the V2L socket strip, the plug is connected to a V2L socket strip, and the V2L mode is entered; If the resistance of the resistor is the same as that of the V2V power gun, the plug is connected to a V2V power gun, and the V2V mode is entered; If the resistance value of the resistor is not the same as that of the V2L socket strip or V2V power gun, it will enter the semi-connected state and wait for the plug to be connected to the power supply; If the plug is connected to the power supply, the SC switch is closed, and the target vehicle detects the resistance of the distribution resistor through the CC line, which is the resistance of the distribution resistor of the gun head, and enters the charging mode.

10. The operating method of the fixed-integrated AC charging and discharging device according to claim 9, characterized in that: The plug is connected to the power supply and includes: The plug is directly connected to the mains, or the plug is connected to the mains via a conversion plug, or the plug is connected to the mains via a wall box.

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