Intelligent distribution box and charging and discharging control method

Abstract

The embodiment of the invention provides an intelligent distribution box and a charging and discharging control method, and the intelligent distribution box comprises a load metering board which comprises a plurality of controllable load loops, and at least one controllable load loop comprises a digital potentiometer; the charging and discharging integrated gun comprises a gun head and a gun line which are connected, and the gun head is used for being connected with an electric automobile; the control panel is electrically connected with the digital potentiometer, and the control panel is used for controlling the resistance value of the digital potentiometer so as to charge the electric vehicle through the charging and discharging integrated gun or discharge the electric vehicle to the intelligent distribution box through the charging and discharging integrated gun; wherein the digital potentiometer responds to an adjusting signal of the control panel so as to adjust a resistance value connected to the controllable load loop, the resistance value comprises a plurality of discharge resistance values, and the discharge resistance values are related to the type of the electric automobile. According to the technical scheme, the charging and discharging integrated gun is arranged in the distribution box, the resistance value is changed through the digital potentiometer, and discharging and charging of electric automobiles of different automobile types can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of power distribution boxes, and in particular to an intelligent power distribution box and a charging and discharging control method. Background Art

[0002] At present, with the increasing market share of new energy vehicles, the demand for home charging piles has also increased. In related technologies, home car charging piles are usually independently set up from distribution boxes, and there is no mutual linkage between the two. Therefore, this type of distribution box cannot provide home car charging piles with functions such as safe electricity use and smart electricity use; another existing smart distribution box deeply integrates the function of a car charging and discharging gun, and the two are combined into one, and its cost is relatively high. This type of smart distribution box can provide home car charging piles with functions such as safe electricity use and smart electricity use. Due to the different charging and discharging standards of new energy vehicles, the deeply integrated charging piles in the existing technology have poor adaptability. After installation, they cannot meet the user's needs of using different types of electric vehicles to reverse discharge home equipment and normal charging. Summary of the invention

[0003] In order to solve or improve the technical problem of poor adaptability of charging piles in the above-mentioned distribution box, one object of the present invention is to provide an intelligent distribution box.

[0004] Another object of the present invention is to provide a charge and discharge control method.

[0005] To achieve the above-mentioned purpose, the first aspect of the present invention provides an intelligent distribution box, comprising: a load metering board, the load metering board comprising multiple controllable load circuits, at least one controllable load circuit comprising a digital potentiometer; a charging and discharging integrated gun, comprising a connected gun head and a gun line, one end of the gun line is connected to at least one controllable load circuit gun head provided with a digital potentiometer for connecting an electric vehicle; a control board, electrically connected to the digital potentiometer, the control board is used to control the resistance value of the digital potentiometer to charge the electric vehicle through the charging and discharging integrated gun or for the electric vehicle to discharge to the intelligent distribution box through the charging and discharging integrated gun; wherein the digital potentiometer responds to an adjustment signal of the control board to adjust the resistance value connected to the controllable load circuit, the resistance value includes multiple discharge resistance values, and the discharge resistance value is related to the model of the electric vehicle.

[0006] The intelligent distribution box provided by the present invention includes a load metering board, a charging and discharging integrated gun, and a control board, wherein the load metering board is responsible for monitoring and managing the current and voltage of multiple controllable load circuits. By monitoring each circuit, accurate control of the charging and discharging process of the electric vehicle can be achieved, thereby improving the safety and efficiency of the system. Specifically, the load metering board includes multiple controllable load circuits, each of which can be connected to an electrical load, so that each controllable load circuit can be independently controlled, allowing personalized management of different electrical loads.

[0007] It should be emphasized that a digital potentiometer is integrated in one or more of the multiple controllable load circuits provided on the load metering board, and the resistance value connected to the controllable load circuit can be dynamically adjusted as needed, so that when the charging and discharging integrated gun is connected to the controllable load circuit, the resistance value can be adjusted to adapt to the charging and discharging needs of different electric vehicle models. It can be understood that the digital potentiometer is used to adjust the resistance value of the controllable load circuit, so that the system can flexibly adapt to the charging and discharging characteristics of different electric vehicles, and improve the compatibility and adaptability of the system.

[0008] The charging and discharging integrated gun serves as the physical connection interface between the electric vehicle and the intelligent distribution box, providing a reliable power transmission channel to ensure the safety and efficiency of the charging and discharging process.

[0009] The control board is mainly responsible for receiving external signals and adjusting the resistor of the digital potentiometer. By adjusting the resistance value of the digital potentiometer, the charging and discharging process can be accurately managed to meet the charging needs and the discharging needs corresponding to different vehicle models, thereby ensuring efficient and stable power transmission.

[0010] Among them, due to the unified charging standards, when controlling the integrated charge and discharge gun to charge the electric vehicle, the resistance value only needs to be adjusted to the same value, that is, the charging resistance value can meet the charging needs of the electric vehicle. However, due to different discharge standards, different models of different manufacturers will have different resistance values ​​when discharging. Therefore, by responding to the adjustment signal sent by the control board, the resistance value of the controllable load circuit connected to the digital potentiometer can be adjusted, that is, the discharge resistance value. The specific adjustment object is a plurality of discharge resistance values ​​suitable for different models, so that different models can meet the discharge needs of the intelligent distribution box when connected to the integrated charge and discharge gun in the intelligent distribution box, thereby improving the efficiency and compatibility of the discharge process.

[0011] It can be understood that in this solution, the handshake resistor (i.e., Rc resistor) originally provided in the charging gun or the discharging gun is transferred to the controllable load circuit located in the intelligent distribution box, and the digital potentiometer is arranged on the outside of the charging and discharging integrated gun. The resistance value of the digital potentiometer is directly adjusted through the control panel of the intelligent distribution box to realize the two-way energy flow between the electric vehicle and the power grid. The electric vehicle can be charged, that is, the current flows from the intelligent distribution box and the charging and discharging integrated gun to the electric vehicle, and the electric energy of the electric vehicle can also be fed back to the intelligent distribution box. For example, the electric energy of the electric vehicle is finally transmitted to the household power load through the charging and discharging integrated gun and the intelligent distribution box, thereby meeting the charging needs of the electric vehicle and the discharging needs of different models.

[0012] In addition, the above technical solution provided by the present invention may also have the following additional technical features:

[0013] In the above technical solution, the control board is used to communicate with the remote operation terminal, and the control board is used to receive the charging and discharging instructions issued by the remote operation terminal.

[0014] The control panel is connected to the remote operation terminal, so that the user can issue charging and discharging instructions through the remote operation terminal (such as mobile phone, computer, etc.) far away from the distribution box, which greatly improves the convenience and flexibility of operation.

[0015] It can be understood that the control panel is responsible for receiving the charging and discharging instructions issued by the remote operation terminal, and controls the charging and discharging operations of the distribution box according to these instructions. Users can manage the charging and discharging of electric vehicles without being on site, which is convenient for users. Users can operate the distribution box anywhere with a network connection, without having to go to the site in person, saving time and energy.

[0016] In the above technical solution, when the charge-discharge instruction is a charging instruction, the control board sends an adjustment signal to the digital potentiometer in response to the charging instruction to control the resistance value of the digital potentiometer to be adjusted to the charging resistance value.

[0017] When the charge and discharge instructions are specifically charging instructions, the charging instruction is the trigger signal for starting the entire charging operation. It is sent by the remote operation terminal (such as a mobile phone APP), so that the system switches to the charging mode and starts the charging process. After the control board receives the charging instruction, it needs to parse the instruction to determine that the current operation to be performed is a charging operation, and then adjust the resistance value of the digital potentiometer. Through the processing of the control board, the user's charging demand is converted into a specific operation of the digital potentiometer, realizing the conversion from user instructions to hardware control, ensuring that the charging operation can be carried out according to the predetermined parameters.

[0018] In this process, the digital potentiometer accurately adjusts its resistance value to the charging resistance value according to the adjustment signal sent by the control board. This charging resistance value is pre-set according to the charging requirements of the electric vehicle. Generally, based on regional standards, the charging resistance values ​​of different models are the same. Of course, different charging power may also lead to different corresponding charging resistance values.

[0019] When the remote operation terminal issues a charging command, the control board, as the intermediate control hub, receives the command and sends an adjustment signal to the digital potentiometer. The digital potentiometer adjusts the resistance value in response to this signal.

[0020] In the above technical solution, when the charge and discharge instruction is a discharge instruction, the control board is used to receive the vehicle model information corresponding to the discharge instruction. The control board sends an adjustment signal to the digital potentiometer in response to the discharge instruction to control the resistance value of the digital potentiometer to be adjusted to the discharge resistance value corresponding to the vehicle model information.

[0021] In this technical solution, the charge and discharge instructions are discharge instructions, which are issued by the remote operation terminal. At present, electric vehicles have different discharge resistance values ​​according to different models when discharging. Therefore, when determining that the charge and discharge instructions are discharge instructions, it is necessary to first clarify the specific model of the electric vehicle that is performing the discharge operation. After receiving the discharge instruction and its corresponding model information, the control board first integrates and processes this information.

[0022] It can be understood that the control board will pre-store a database of the corresponding relationship between the available vehicle models and the discharge resistance values, determine the discharge resistance value required for the vehicle model, and then make a decision to send an adjustment signal to the digital potentiometer.

[0023] The digital potentiometer accurately adjusts its own resistance value to the discharge resistance value corresponding to the vehicle model information according to the adjustment signal sent by the control board, thereby controlling the current in the discharge circuit.

[0024] In the above technical solution, the gun line includes a vehicle-pile connection detection line, and the control board is used to determine the connection status of the charging and discharging integrated gun and the electric vehicle through the vehicle-pile connection detection line. The control board is also used to adjust the resistance value of the digital potentiometer when the connection status is a successful connection state.

[0025] In this technical solution, the signal line also includes a vehicle-pile connection detection line (i.e., Control Pilot, CC line), which is used to monitor the connection between the charging and discharging integrated gun and the electric vehicle in real time, and provide the control board with information on whether the connection is successful. The control board determines the connection status between the charging and discharging integrated gun and the electric vehicle through the signal transmitted by the vehicle-pile connection detection line. If a successful connection is detected, the control board will send an adjustment signal to the digital potentiometer according to the current charging and discharging requirements, and adjust its resistance value to an appropriate value (such as charging resistance or discharge resistance corresponding to the vehicle model).

[0026] It can be understood that by first detecting the connection status and then adjusting the resistance value, it is possible to avoid misoperation when the connection is not complete, thereby improving the safety of the entire charging and discharging process.

[0027] The above technical solution includes: an integrated circuit bus, one end of the integrated circuit bus is connected to the control board, and the other end of the integrated circuit bus is connected to the digital potentiometer.

[0028] By setting up an integrated circuit bus, a communication bridge can be used between the control board and the digital potentiometer, so that the control board can send instructions to the digital potentiometer (such as instructions to adjust the resistance value). At the same time, the digital potentiometer can also feedback its status information (such as the current resistance value, whether it is working normally, etc.) to the control board through the bus.

[0029] Those skilled in the art can understand that in the intelligent distribution box system, the I2C bus only needs two wires, namely the serial data line (ie, Serial Data Line, SDA) and the serial clock line (ie, Serial Clock Line, SCL) to realize the communication between the control board and the digital potentiometer. Compared with other complex communication methods, it greatly simplifies the hardware wiring, reduces the complexity and cost of line connection, and also improves the reliability and maintainability of the system.

[0030] The present invention also proposes a charge and discharge control method, which is used for any of the above-mentioned intelligent distribution boxes. The charge and discharge control method includes: when the intelligent distribution box is connected to the electric vehicle through an integrated charge and discharge gun, receiving a charge and discharge instruction issued by a remote operation terminal; and adjusting the resistance value of the digital potentiometer according to the charge and discharge instruction.

[0031] In this solution, when the smart distribution box is connected to the electric vehicle through the integrated charging and discharging gun, the charging and discharging instructions issued by the remote operation terminal are obtained to ensure that a physical connection is established between the smart distribution box and the electric vehicle (through the integrated charging and discharging gun). On this basis, the charging and discharging instructions are obtained, which include but are not limited to charging, discharging, and specific charging or discharging parameters (such as charging current, discharge power, etc.). In this solution, since the received charging and discharging instructions are issued by the remote operation terminal, the user can achieve remote control during use. As long as the corresponding charging and discharging instructions are issued through the remote operation terminal, the smart distribution box can achieve the corresponding functions.

[0032] Among them, the remote operation terminal includes but is not limited to mobile terminals, fixed terminals, etc., and can be controlled through mini-programs or applications.

[0033] Specifically, based on the connection between the intelligent distribution box and the electric vehicle, the transmission and control of electric energy can be performed. By receiving the charging and discharging instructions issued by the remote operation terminal, the intelligent distribution box can perform charging or discharging operations according to the user's wishes.

[0034] Finally, depending on the type of charge or discharge command (charge or discharge) and the vehicle model information that may be involved (in the case of a discharge command), the resistance value of the digital potentiometer can be precisely adjusted to achieve appropriate current control.

[0035] In the above technical solution, receiving the charge and discharge instructions issued by the remote operation terminal specifically includes: receiving the charging instruction; adjusting the resistance value of the digital potentiometer according to the charging and discharging instruction, specifically includes: sending an adjustment signal to the digital potentiometer in response to the charging instruction to control the resistance value of the digital potentiometer to be adjusted to the charging resistance value.

[0036] In this solution, the charging command issued by the remote operation terminal is a signal to start the charging operation. When the intelligent distribution box receives this command, it needs to charge the connected electric vehicle. After receiving the charging command, the control board will send an adjustment signal to the digital potentiometer, thereby informing the digital potentiometer that the resistance value needs to be adjusted to a resistance value suitable for charging (charging resistance value).

[0037] After receiving the adjustment signal, the digital potentiometer will adjust its resistance value to the charging resistance value. This ensures that during the charging process, the current size meets the charging requirements of the electric vehicle, which can not only ensure the charging efficiency, but also avoid excessive current from damaging the battery.

[0038] In the above technical solution, receiving the charge and discharge instructions issued by the remote operation terminal specifically includes: receiving the discharge instruction; adjusting the resistance value of the digital potentiometer according to the charge and discharge instruction, specifically including: determining the vehicle model information related to the discharge instruction; sending an adjustment signal corresponding to the vehicle model information to the digital potentiometer to control the resistance value of the digital potentiometer to be adjusted to the discharge resistance value corresponding to the vehicle model information.

[0039] The discharge command sent by the remote operation terminal is a signal to start the electric vehicle to discharge to the intelligent distribution box. When the intelligent distribution box receives this command, it is ready to perform the discharge operation. Different models of electric vehicles require different resistance values ​​when discharging to ensure a safe and efficient discharge process. Therefore, it is necessary to determine the model information related to the discharge command so that the resistance value of the digital potentiometer can be adjusted to the appropriate discharge resistance value.

[0040] According to the determined vehicle model information, the control board sends a corresponding adjustment signal to the digital potentiometer. After receiving the adjustment signal, the digital potentiometer adjusts its own resistance value to the discharge resistance value corresponding to the vehicle model information. This ensures that during the discharge process, the current size meets the discharge requirements of the vehicle model, avoiding discharge problems caused by mismatched resistance values, such as low discharge efficiency and battery damage.

[0041] The above technical solution also includes: obtaining a confirmed discharge instruction of the electric vehicle; and controlling the charging and discharging integrated gun to discharge from the electric vehicle to the intelligent distribution box according to the confirmed discharge instruction.

[0042] After the smart distribution box receives the discharge command from the remote operation terminal and completes the adjustment of the digital potentiometer resistance value, it is necessary to further obtain the confirmation discharge command from the electric vehicle itself. It can be understood that a second confirmation before discharging can ensure that the discharge operation is carried out when both the electric vehicle and the smart distribution box are ready, thereby improving the safety and reliability of the discharge operation.

[0043] Once the confirmed discharge instruction from the electric vehicle is obtained, the control panel of the smart distribution box will control the charging and discharging integrated gun to realize the transmission of electric energy from the electric vehicle to the smart distribution box, that is, start the discharge operation, and realize the transfer of electric energy from the electric vehicle to the smart distribution box. In the event of a power outage or other emergency, the electric energy of the electric vehicle can provide power support for household loads, etc., thereby improving energy utilization efficiency and emergency power supply capabilities.

[0044] Additional aspects and advantages of the technical solutions of the present invention will become apparent in the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic structural diagram of an intelligent distribution box according to an embodiment of the present invention is shown;

[0046] Figure 2 A schematic diagram of AC pile charging mode control guidance according to an embodiment of the present invention is shown;

[0047] Figure 3 A discharge guiding principle diagram of a vehicle discharge mode according to an embodiment of the present invention is shown;

[0048] Figure 4 The schematic diagram of the structure of the charging and discharging integrated gun head and its connection line in the related art is shown;

[0049] Figure 5 A schematic diagram of the structure of setting an access loop in an intelligent distribution box according to an embodiment of the present invention is shown;

[0050] Figure 6 A schematic diagram of a charge and discharge control logic flow according to an embodiment of the present invention is shown;

[0051] Figure 7 A schematic diagram showing a structure in which an intelligent distribution box is connected to other devices according to an embodiment of the present invention;

[0052] Figure 8 A schematic flow chart of a charge and discharge control method according to an embodiment of the present invention is shown.

[0053] in, Figures 1 to 8 The corresponding relationship between the reference numerals and the component names is as follows:

[0054] 100: intelligent distribution box; 102: load metering board; 103: controllable load circuit; 104: digital potentiometer; 106: charging and discharging integrated gun; 1062: signal line; 1063: integrated circuit bus; 1064: power line; 1072: gun head; 1074: gun line; 108: control board. DETAILED DESCRIPTION

[0055] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0056] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0057] Refer to the following Figures 1 to 8 An intelligent distribution box and a charge-discharge control method provided according to some embodiments of the present invention are described.

[0058] like Figure 1 As shown, the present invention proposes an intelligent distribution box 100, including a load metering board 102, a charging and discharging integrated gun 106 and a control board 108, wherein the load metering board 102 is responsible for monitoring and managing the current and voltage of multiple controllable load circuits 103. By monitoring each circuit, accurate control of the charging and discharging process of the electric vehicle can be achieved, thereby improving the safety and efficiency of the system. Specifically, the load metering board 102 includes multiple controllable load circuits 103, each of which can be connected to an electrical load, so that each controllable load circuit 103 can be independently controlled, allowing personalized management of different electrical loads.

[0059] It should be emphasized that a digital potentiometer 104 is integrated on one or more of the multiple controllable load circuits 103 provided on the load metering board 102, and the resistance value connected to the controllable load circuit 103 can be dynamically adjusted as needed, so that when the charging and discharging integrated gun 106 is connected to the controllable load circuit, the charging and discharging requirements of different electric vehicle models can be adapted by adjusting the resistance value. It can be understood that the digital potentiometer 104 is used to adjust the resistance value of the controllable load circuit 103, so that the system can flexibly adapt to the charging and discharging characteristics of different electric vehicles, thereby improving the compatibility and adaptability of the system.

[0060] The integrated charging and discharging gun 106 serves as a physical connection interface between the electric vehicle and the intelligent distribution box, and specifically includes a connected gun head 1072 and a gun line 1074, wherein the gun head 1072 is used to connect to the AC port of the electric vehicle, and the gun line 1074 may include a signal line 1062 for transmitting signals and a power line 1064 for transmitting current, thereby providing a reliable power transmission channel to ensure the safety and efficiency of the charging and discharging process.

[0061] The control board 108 is mainly responsible for receiving external signals and adjusting the resistor of the digital potentiometer 104. By adjusting the resistance value of the digital potentiometer 104, the charging and discharging process can be accurately managed to meet the charging requirements and the discharging requirements corresponding to different vehicle models, thereby ensuring efficient and stable power transmission.

[0062] Among them, due to the unified charging standards, when controlling the charging and discharging integrated gun 106 to charge the electric vehicle, the resistance value only needs to be adjusted to the same value to meet the charging needs of the electric vehicle. However, due to different discharge standards, different models of different manufacturers will have different resistance values ​​when discharging. Therefore, by responding to the adjustment signal sent by the control board 108, the resistance value of the controllable load circuit 103 connected to the digital potentiometer 104 can be adjusted. The specific adjustment object is a plurality of discharge resistance values ​​adapted to different models, so that different models can meet the discharge needs of the intelligent distribution box when connected to the charging and discharging integrated gun 106 in the intelligent distribution box, thereby improving the efficiency and compatibility of the discharge process.

[0063] It can be understood that in this solution, the handshake resistor (i.e., Rc resistor) originally provided in the charging gun or the discharging gun is transferred to the controllable load circuit 103 located in the intelligent distribution box, and the digital potentiometer 104 is provided outside the charging and discharging integrated gun 106. The resistance value of the digital potentiometer 104 is directly adjusted through the control board 108 of the intelligent distribution box to realize the two-way energy flow between the electric vehicle and the power grid, which can not only charge the electric vehicle, but also feed the electric energy of the electric vehicle back to the power grid, thereby meeting the charging needs of the electric vehicle and the discharging needs of different models.

[0064] For example, loads of different powers and importance (such as lighting circuits, high-power electrical circuits, etc.) can be differentiated to reasonably allocate power resources in different charging and discharging scenarios. The flexibility of the distribution box for load management is improved, and it can better adapt to complex power demand, such as Figure 7 As shown, when charging, the power of the power grid (GRID in the figure) can be transmitted to the smart distribution box 100 through alternating current (AC in the figure), and then transmitted to the battery of the electric vehicle through the controllable load circuit and the charging and discharging integrated gun 106; when discharging, the battery power of the electric vehicle can be supplied to the household load (LOAD in the figure) through the charging and discharging integrated gun 106 and the controllable load circuit, realizing two-way communication and power transmission between the electric vehicle and the household distribution box, and providing a hardware foundation for the intelligent charging and discharging function. Among them, the power transmission between the electric vehicle and the smart distribution box 100 is through alternating current (AC in the figure).

[0065] like Figure 5As shown, the integrated charge and discharge gun 106 is communicatively connected with the load metering board 102 via a signal line 1062 , so that the integrated charge and discharge gun 106 can exchange information with the load metering board 102 .

[0066] By limiting the connection between the power line 1064 and the controllable load circuit 103, a power transmission channel between the electric vehicle and the distribution box is established. When charging, the power of the power grid can be transmitted to the battery of the electric vehicle through the controllable load circuit 103 and the charging and discharging integrated gun 106 of the distribution box; when discharging, the battery power of the electric vehicle can be used to supply power to the household load through the charging and discharging integrated gun 106 and the controllable load circuit 103, realizing two-way communication and power transmission between the electric vehicle and the household distribution box, and providing a hardware foundation for the intelligent charging and discharging function.

[0067] In one embodiment, the control panel 108 is optionally connected to a remote operation terminal for communication, so that a user can issue charging and discharging instructions through a remote operation terminal (such as a mobile phone, computer, etc.) away from the distribution box, which greatly improves the convenience and flexibility of operation.

[0068] It can be understood that the control panel 108 is responsible for receiving the charging and discharging instructions issued by the remote operation terminal, and controls the charging and discharging operation of the distribution box according to these instructions. The user can manage the charging and discharging of the electric vehicle without being on site, which is convenient for the user. The user can operate the distribution box anywhere with a network connection, without having to go to the site in person, saving time and energy.

[0069] In one embodiment, optionally, when the charge and discharge instructions are specifically charging instructions, the charging instruction is a trigger signal for starting the entire charging operation, which is sent by a remote operation terminal (such as a mobile phone APP), so that the system switches to a charging mode and starts the charging process. After the control board 108 receives the charging instruction, it needs to parse the instruction to determine that the current operation to be performed is a charging operation, and then adjust the resistance value of the digital potentiometer 104. Through the processing of the control board 108, the user's charging demand is converted into a specific operation of the digital potentiometer 104, thereby realizing the conversion from user instructions to hardware control, ensuring that the charging operation can be performed according to predetermined parameters.

[0070] In this process, the digital potentiometer 104 accurately adjusts its resistance value to the charging resistance value according to the adjustment signal sent by the control board 108. The charging resistance value is pre-set according to the charging requirements of the electric vehicle. Generally, based on regional standards, the charging resistance values ​​of different models are the same. Of course, different charging power may also lead to different corresponding charging resistance values.

[0071] When the remote operation terminal issues a charging instruction, the control board 108, as an intermediate control hub, receives the instruction and sends an adjustment signal to the digital potentiometer 104. The digital potentiometer 104 adjusts the resistance value in response to the signal.

[0072] In one embodiment, the charge and discharge instruction is optionally a discharge instruction, which is issued by a remote operation terminal. Since electric vehicles have different discharge resistance values ​​according to different vehicle models when discharging, when determining that the charge and discharge instruction is a discharge instruction, it is necessary to first clarify the specific vehicle model of the electric vehicle that is performing the discharge operation. After receiving the discharge instruction and its corresponding vehicle model information, the control board 108 first integrates and processes the information.

[0073] It can be understood that the control board 108 will pre-store a database of the corresponding relationship between the available vehicle models and the discharge resistance values, determine the discharge resistance value required for the vehicle model, and then make a decision to send an adjustment signal to the digital potentiometer 104.

[0074] The digital potentiometer 104 accurately adjusts its own resistance value to the discharge resistance value corresponding to the vehicle model information according to the adjustment signal sent by the control board 108, thereby controlling the current size in the discharge circuit.

[0075] In one embodiment, optionally, Figure 5 As shown, the gun line also includes a vehicle-pile connection detection line (i.e., Control Pilot, CC line), which is used to monitor the connection between the charging and discharging integrated gun 106 and the electric vehicle in real time, and provide information about whether the connection is successful to the control board 108. Among them, the control board 108 determines the connection status between the charging and discharging integrated gun 106 and the electric vehicle through the signal transmitted by the vehicle-pile connection detection line. If the connection is detected to be successful, the control board 108 will send an adjustment signal to the digital potentiometer 104 according to the current charging and discharging demand, and adjust its resistance value to an appropriate value (such as charging resistance or discharge resistance value corresponding to the vehicle model).

[0076] It can be understood that by first detecting the connection status and then adjusting the resistance value, it is possible to avoid misoperation when the connection is not complete, thereby improving the safety of the entire charging and discharging process.

[0077] In one embodiment, optionally, an integrated circuit bus 1063 is set to act as a communication bridge between the control board 108 and the digital potentiometer 104, so that the control board 108 can send instructions (such as instructions to adjust the resistance value) to the digital potentiometer 104. At the same time, the digital potentiometer 104 can also feedback its status information (such as the current resistance value, whether it is working normally, etc.) to the control board 108 through the bus.

[0078] Those skilled in the art can understand that in the intelligent distribution box 100 system, the I2C bus only needs two lines (data line SDA and clock line SCL) to realize the communication between the control board 108 and the digital potentiometer 104. Compared with other complex communication methods, it greatly simplifies the hardware wiring, reduces the complexity and cost of line connection, and also improves the reliability and maintainability of the system.

[0079] The present invention also provides a charge and discharge control method for any of the above intelligent distribution boxes, such as Figure 8 As shown, the charge and discharge control method includes: step S102: when the intelligent distribution box is connected to the electric vehicle through the charge and discharge integrated gun, receiving the charge and discharge instructions issued by the remote operation terminal; step S104: adjusting the resistance value of the digital potentiometer according to the charge and discharge instructions.

[0080] When the smart distribution box is connected to the electric vehicle through the integrated charging and discharging gun, the charging and discharging instructions issued by the remote operation terminal are obtained to ensure that a physical connection is established between the smart distribution box and the electric vehicle (through the integrated charging and discharging gun). On this basis, the charging and discharging instructions are obtained, which include but are not limited to charging, discharging, and specific charging or discharging parameters (such as charging current, discharge power, etc.). In this solution, since the received charging and discharging instructions are issued by the remote operation terminal, the user can achieve remote control during use. As long as the corresponding charging and discharging instructions are issued through the remote operation terminal, the smart distribution box can achieve the corresponding functions.

[0081] Among them, the remote operation terminal includes but is not limited to mobile terminals, fixed terminals, etc., and can be controlled through mini-programs or applications.

[0082] Specifically, based on the connection between the intelligent distribution box and the electric vehicle, the transmission and control of electric energy can be performed. By receiving the charging and discharging instructions issued by the remote operation terminal, the intelligent distribution box can perform charging or discharging operations according to the user's wishes.

[0083] Finally, depending on the type of charge or discharge command (charge or discharge) and the vehicle model information that may be involved (in the case of a discharge command), the resistance value of the digital potentiometer can be precisely adjusted to achieve appropriate current control.

[0084] This method can adapt to the charging and discharging needs of a variety of different vehicle models. By flexibly selecting the access circuit, the intelligent distribution box can cooperate well with various electric vehicles, thereby improving the compatibility and versatility of the system.

[0085] Furthermore, receiving the charge and discharge instructions issued by the remote operation terminal specifically includes: receiving the charging instruction; adjusting the resistance value of the digital potentiometer according to the charging and discharging instruction, specifically including: sending an adjustment signal to the digital potentiometer in response to the charging instruction to control the resistance value of the digital potentiometer to be adjusted to the charging resistance value.

[0086] The charging command sent by the remote operation terminal is a signal to start the charging operation. When the intelligent distribution box receives this command, it needs to charge the connected electric vehicle. After receiving the charging command, the control board will send an adjustment signal to the digital potentiometer, thereby informing the digital potentiometer that the resistance value needs to be adjusted to a resistance value suitable for charging (charging resistance value).

[0087] After receiving the adjustment signal, the digital potentiometer will adjust its resistance value to the charging resistance value. This ensures that during the charging process, the current size meets the charging requirements of the electric vehicle, which can not only ensure the charging efficiency, but also avoid excessive current from damaging the battery.

[0088] Furthermore, receiving the charge and discharge instructions issued by the remote operation terminal specifically includes: receiving the discharge instructions; adjusting the resistance value of the digital potentiometer according to the charge and discharge instructions, specifically including: determining the vehicle model information related to the discharge instructions; sending an adjustment signal corresponding to the vehicle model information to the digital potentiometer to control the resistance value of the digital potentiometer to be adjusted to the discharge resistance value corresponding to the vehicle model information.

[0089] The discharge command sent by the remote operation terminal is a signal to start the electric vehicle to discharge to the intelligent distribution box. When the intelligent distribution box receives this command, it is ready to perform the discharge operation. Different models of electric vehicles require different resistance values ​​when discharging to ensure a safe and efficient discharge process. Therefore, it is necessary to determine the model information related to the discharge command so that the resistance value of the digital potentiometer can be adjusted to the appropriate discharge resistance value.

[0090] According to the determined vehicle model information, the control board sends a corresponding adjustment signal to the digital potentiometer. After receiving the adjustment signal, the digital potentiometer adjusts its own resistance value to the discharge resistance value corresponding to the vehicle model information. This ensures that during the discharge process, the current size meets the discharge requirements of the vehicle model, avoiding discharge problems caused by mismatched resistance values, such as low discharge efficiency and battery damage.

[0091] Furthermore, it also includes: obtaining a confirmed discharge instruction of the electric vehicle; and controlling the charge-discharge integrated gun to discharge from the electric vehicle to the intelligent distribution box according to the confirmed discharge instruction.

[0092] After the smart distribution box receives the discharge command from the remote operation terminal and completes the adjustment of the digital potentiometer resistance value, it is necessary to further obtain the confirmation discharge command from the electric vehicle itself. It can be understood that a second confirmation before discharging can ensure that the discharge operation is carried out when both the electric vehicle and the smart distribution box are ready, thereby improving the safety and reliability of the discharge operation.

[0093] Once the confirmed discharge instruction from the electric vehicle is obtained, the control panel of the smart distribution box will control the charging and discharging integrated gun to realize the transmission of electric energy from the electric vehicle to the smart distribution box, that is, start the discharge operation, and realize the transfer of electric energy from the electric vehicle to the smart distribution box. In the event of a power outage or other emergency, the electric energy of the electric vehicle can provide power support for household loads, etc., thereby improving energy utilization efficiency and emergency power supply capabilities.

[0094] In a specific embodiment, the principle of the AC charging pile is to control the vehicle-mounted OBC to charge the electric vehicle, thereby realizing the discharge function of the power grid to the electric vehicle. At present, there is a new AC discharge device (Vehicle to Load, V2L) on the market, which can realize the function of electric vehicles discharging loads. The principle is to use a device that converts the gun line to the power strip, so that the car can recognize the discharge demand on the gun line, so that the on-board charger (On-Board Charger, OBC) on the car can continuously output power to the power strip.

[0095] However, V2L devices have several pain points. One is that they can only discharge to the power strip but not to the home power grid. Another is that they are limited by the design of the discharge power strip, which has a low power output, generally only 3.6kW of external discharge power. This solution combines AC charging piles and AC discharge equipment, and integrates the charging piles into the home distribution box. At the same time, a digital potentiometer for adjusting the resistance value is set in the home distribution box to be compatible with different car models, so that electric vehicles can directly power the home distribution box, so that when the home power outage occurs, the electric vehicle can continuously power the electrical equipment in the house.

[0096] like Figure 2 As shown, Figure 2This is the control guidance schematic diagram of the AC charging mode. When the voltage at the charging pile detection point 4 is 0V, it means that the power supply interface CC is connected normally. The electric vehicle determines whether the plug is fully connected to the car by detecting the resistance value between the detection point 3 and PE. Then the voltage at the charging pile detection point 1 is Vcc×(R3 / (R1+R3)), indicating that the control signal line of the power supply interface (i.e. Control Pilot, CP line) is connected normally. The charging pile starts the charging signal, and S1 switches from +12V to PWM signal. When the car receives the charging start signal, S2 is closed. The charging pile detects that the PWM peak voltage is V2=Vcc×((R2 / / R3) / (R1+(R2 / / R3))), then K1 and K2 are closed to start charging.

[0097] Among them, R1, R2 and R3 are Figure 2 The resistance value of the corresponding circuit components. Vcc is the voltage that provides power to the charging pile control and detection circuit.

[0098] Detection point 3 determines whether CC is connected by detecting the access circuit (grounding). If grounding is detected, CC is considered to be connected. Different resistance values ​​correspond to different charging (discharging) current values. The CC signal is used to determine the charging current allowed by the cable specifications of the charging and discharging integrated gun.

[0099] like Figure 3 As shown, Figure 3 This is the discharge guidance schematic diagram of the automobile discharge mode. The discharge vehicle control circuit determines whether the vehicle plug and the vehicle socket are fully connected by measuring the resistance value between the detection point 3' and PE. After full connection, the voltage of the detection point 2' determines whether it is allowed to enter the discharge state. After the detection point 2' is less than 1V and the operator sets the V2L discharge mode, the switch S4 switches to the discharge control circuit. Then close K1 and K2 to enter the discharge mode; the discharge vehicle control device confirms the rated capacity of the current conductive connection component (cable) by measuring the resistance value between the detection point 3' and PE.

[0100] Electric vehicles use the resistance value from the CC signal at detection point 3 to PE to determine whether they are in the charging or discharging state and the rated capacity of charging and discharging. Different models are adapted to different charging and discharging resistances. The following table shows the charging and discharging conditions of different models with different Rc resistance values:

[0101] Charging and discharging conditions of different models Rc resistance 7~12KW charging 150Ω Modern car discharge 75Ω BYD Discharge 2KΩ Other models 3.3KΩ

[0102] In the traditional solution, the Rc resistor (i.e., the handshake resistor) is integrated into the charging and discharging integrated gun line. The specific principle is as follows: Figure 4As shown, L1 and N are the live wire and neutral wire of the charging gun head respectively, S3 and R4 are the switch and fixed value resistor in the charging gun head respectively, and the PE line is the protective grounding line. The line is used to provide grounding protection for electrical equipment to ensure that in the event of a fault, the current can be safely released through the ground wire to prevent the electric vehicle or charging pile from electric shock. The PE line connects the grounding terminal of the charging pile and the grounding terminal of the electric vehicle (such as the metal body). The CP line is a control guide line used for communication and control during the charging process. It is mainly used for signal exchange between electric vehicles and charging piles to ensure the safety and effectiveness of the charging process. Through the CP line, the charging pile can exchange charging status information with the electric vehicle, confirm the charging power, and control the start and stop of charging.

[0103] The CC line is a charging cable used to provide current transmission during the charging process. It is the main power line that transmits the charging current between the electric vehicle and the charging pile. Between the charging pile and the electric vehicle, the CC line connects the power source and the vehicle's charging port to provide power to the battery.

[0104] In order to adapt to the charging and discharging switching of electric vehicles, as well as the charging and discharging modes of various models, the Rc (handshake resistor) integrated into the AC gun line is transplanted into the distribution box, and Rc is replaced with a digital potentiometer. Then the user can adjust and change the resistance value of the digital potentiometer according to their own vehicle model and different charging and discharging requirements. That is, the user can change the resistance of the access circuit in the distribution box in real time according to the vehicle model and charging and discharging requirements to meet the use requirements of the electric vehicle.

[0105] like Figure 6 As shown, a control logic of charging and discharging is proposed, including: step S202: confirm the use demand; step S204: determine whether the interface or mobile phone APP selection is charging; if so, step S2062: the distribution box charges the electric car; step S2082: remote control through MCU; step S2102: the AC gun line and the electric car are successfully connected, and the MCU makes the digital potentiometer resistance value the charging resistance value through the I2C bus. When CC samples that the AC pile is successfully connected, the MCU starts to communicate with the vehicle end through the PWM handshake signal and controls the relay to charge. If the judgment result of step S204 is no, step S2064 is executed: the electric car discharges the distribution box; step S2084: remote control is performed through MCU; step S2104: the AC gun completes the connection with the electric car, and the MCU controls the resistance value of the digital potentiometer according to the issued vehicle model; step S212: the electric car confirms the discharge operation and discharges.

[0106] First, you need to determine the usage requirements, whether to charge or discharge the vehicle. Both charging and discharging can be selected through the mobile phone APP or interface. For discharging, you can select the corresponding model, and the microcontroller unit (MCU) will automatically set the matching resistance value of the corresponding model to achieve the discharge function. If there are new models in the future, as long as the mobile phone APP is upgraded, the mobile phone APP will correctly send the corresponding discharge resistance value, and this device can support it without replacing the device, thereby improving the adaptability of the product.

[0107] According to the intelligent distribution box and the charge and discharge control method provided by the present invention, the charge and discharge integrated gun is built into the distribution box, and the resistance value is changed by using a digital potentiometer, so that the discharge and charging of different types of electric vehicles can be realized.

[0108] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0109] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0110] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent distribution box, characterized in that: include: A load metering board, the load metering board comprising a plurality of controllable load circuits, at least one of the controllable load circuits comprising a digital potentiometer; A charging and discharging integrated gun, comprising a connected gun head and a gun line, one end of the gun line is connected to at least one controllable load circuit provided with the digital potentiometer, and the gun head is used to connect to an electric vehicle; A control board, electrically connected to the digital potentiometer, the control board is used to control the resistance value of the digital potentiometer so as to charge the electric vehicle through the charging and discharging integrated gun or discharge the electric vehicle to the intelligent distribution box through the charging and discharging integrated gun; The digital potentiometer responds to the adjustment signal of the control board to adjust the resistance value connected to the controllable load loop, and the resistance value includes a plurality of discharge resistance values, and the discharge resistance value is related to the model of the electric vehicle.

2. The intelligent distribution box according to claim 1, characterized in that: The control panel is used for communication connection with the remote operation terminal, and the control panel is used for receiving the charge and discharge instructions issued by the remote operation terminal.

3. The intelligent distribution box according to claim 2, characterized in that: The resistance value includes a charging resistance value. When the charge-discharge instruction is a charging instruction, the control board sends the adjustment signal to the digital potentiometer in response to the charging instruction to control the resistance value of the digital potentiometer to be adjusted to the charging resistance value.

4. The intelligent distribution box according to claim 2, characterized in that: When the charge and discharge instruction is a discharge instruction, the control board is used to receive vehicle type information corresponding to the discharge instruction. In response to the discharge instruction, the control board sends the adjustment signal to the digital potentiometer to control the resistance value of the digital potentiometer to be adjusted to the discharge resistance value corresponding to the vehicle type information.

5. The intelligent distribution box according to any one of claims 1 to 4, characterized in that: The gun line includes a vehicle-pile connection detection line, and the control board is used to determine the connection status of the charging and discharging integrated gun and the electric vehicle through the vehicle-pile connection detection line. The control board is also used to adjust the resistance value of the digital potentiometer when the connection status is a successful connection state.

6. The intelligent distribution box according to any one of claims 1 to 4, characterized in that: include: An integrated circuit bus, one end of which is connected to the control board, and the other end of which is connected to the digital potentiometer.

7. A charge and discharge control method, characterized in that: For the intelligent distribution box according to any one of claims 1 to 6, the charging and discharging control method comprises: When the intelligent distribution box is connected to the electric vehicle via a charging and discharging integrated gun, receiving a charging and discharging instruction issued by a remote operation terminal; The resistance value of the digital potentiometer is adjusted according to the charge and discharge instruction.

8. The charge and discharge control method according to claim 7, characterized in that: The receiving of the charge and discharge instruction sent by the remote operation terminal specifically includes: Receive charging instructions; The step of adjusting the resistance value of the digital potentiometer according to the charge and discharge instruction specifically includes: In response to the charging instruction, the adjustment signal is sent to the digital potentiometer to control the resistance value of the digital potentiometer to be adjusted to the charging resistance value.

9. The charge and discharge control method according to claim 7, characterized in that: The receiving of the charge and discharge instruction sent by the remote operation terminal specifically includes: receiving a discharge instruction; The step of adjusting the resistance value of the digital potentiometer according to the charge and discharge instruction specifically includes: Determining vehicle model information related to the discharge instruction; An adjustment signal corresponding to the vehicle model information is sent to the digital potentiometer to control the resistance value of the digital potentiometer to be adjusted to a resistance value corresponding to the vehicle model information.

10. The charge and discharge control method according to claim 9, characterized in that: Also includes: Obtaining a confirmation discharge instruction of the electric vehicle; According to the confirmed discharge instruction, the charging and discharging integrated gun is controlled to discharge from the electric vehicle to the intelligent distribution box.

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