Intelligent distribution box and charging and discharging control method

Abstract

The embodiment of the invention provides an intelligent power distribution box and a charging and discharging control method, the intelligent power distribution box comprises a load metering board, the load metering board comprises a plurality of controllable load loops, at least one controllable load loop comprises a change-over switch and a plurality of access loops, the plurality of access loops are different in resistance value, and the change-over switch is connected with the load metering board. The change-over switch is used for communicating with one of the plurality of access loops; the charging and discharging integrated gun is in communication connection with the load metering plate through a signal line, a power line of the charging and discharging integrated gun is connected with at least one controllable load loop, the access loop comprises at least part of the signal line, and the charging and discharging integrated gun is used for being connected with an electric automobile; the access loop comprises a charging loop and at least one discharging loop, and a handshake resistor of the discharging loop is 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, and discharging and charging of different types of electric automobiles can be achieved through switching of the multiple access loops.

Description

Technical Field

[0001] The present invention relates to the field of distribution boxes, and in particular to an intelligent 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, including: a load metering board, the load metering board includes multiple controllable load circuits, at least one controllable load circuit includes a switching switch and multiple access circuits, each access circuit is provided with a handshake resistor, the resistance values ​​of the handshake resistors in the multiple access circuits are different, and the switching switch is used to connect one of the multiple access circuits; a charging and discharging integrated gun, the charging and discharging integrated gun is communicatively connected to the load metering board through a signal line, and the power line of the charging and discharging integrated gun is connected to at least one controllable load circuit, the access circuit includes at least part of the signal line, and the charging and discharging integrated gun is used to connect an electric vehicle; a control board, which is electrically connected to the load metering board, and the control board is used to monitor the charging and discharging integrated gun or control the charging and discharging integrated gun to charge the electric vehicle or discharge the electric vehicle to the intelligent distribution box; wherein, the access circuit includes a charging circuit and at least one discharging circuit, and the handshake resistor of the discharging circuit 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 a plurality of controllable load circuits mainly divide the load of the distribution box into circuits, so as to facilitate the separate control and management of different loads. For example, loads of different powers and different importance (such as lighting circuits, high-power electrical circuits, etc.) can be distinguished so as to reasonably allocate power resources in different charging and discharging scenarios.

[0007] The flexibility of the distribution box in load management is improved, and it can better adapt to complex power demand. For example, when electric vehicles are discharging, the power supply of important loads can be prioritized.

[0008] By limiting at least one controllable load circuit to include a switching switch and multiple access circuits, and the resistance values ​​of the handshake resistors set in the access circuits are different, because different vehicle models have different requirements for the resistance value in the circuit during charging and discharging, by limiting the access circuit to include a charging circuit and a discharging circuit, the handshake resistance of the discharge circuit is related to the model of the electric vehicle. Through the above settings, the user can manually operate the switching switch or remotely control the switching switch to select a suitable access circuit for connection according to the model of the electric vehicle and the charging and discharging requirements, thereby adapting to the charging and discharging requirements of different vehicle models.

[0009] The purpose of selecting access circuits with different resistance values ​​is to match the charging and discharging systems of different models. By providing a variety of resistance values, it can be ensured that the smart distribution box is compatible with the charging and discharging operations of various models. It can be understood that when charging, the handshake resistance of electric vehicles of different models is the same, and when discharging, there will be differentiated handshake resistances depending on the model. By integrating and transferring the resistance originally located on the charging gun or the discharging gun to the inside of the distribution box, the versatility of the smart distribution box is greatly improved, which can be compatible with various models of electric vehicles and expand the scope of application of the product.

[0010] In actual applications, users can easily perform simple switching operations according to their own vehicle models without the need for complicated circuit modifications or additional equipment, which improves the user experience.

[0011] The integrated charge and discharge gun is connected to the load metering board through a signal line, so that the integrated charge and discharge gun can exchange information with the load metering board.

[0012] By limiting the connection between the power line and the controllable load circuit, 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 and the charging and discharging gun of the distribution box; when discharging, the battery power of the electric vehicle can be used to power the household load through the charging and discharging gun 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.

[0013] In addition, the control panel is electrically connected to the load metering board. The control panel can obtain various information on the load metering board, such as the current, voltage and other parameters of each load circuit, and can also send control instructions to the load metering board. This enables the control panel to comprehensively monitor and manage the load conditions of the entire distribution box. It realizes centralized control and management of the distribution box load and improves the intelligence of the system.

[0014] The control panel can also control the charging and discharging gun to charge or discharge the electric vehicle. According to the user's settings, the state of the electric vehicle, and the needs of the household load, the control panel can send instructions to the charging and discharging gun to switch the charging and discharging functions. For example, when the power grid is sufficient and the battery of the electric vehicle is low, the control panel can control the charging and discharging gun to charge the electric vehicle; when the household power outage occurs and the battery of the electric vehicle is sufficient, the control panel can control the charging and discharging gun to discharge the electric vehicle to the household load.

[0015] In addition, the above technical solution provided by the present invention may also have the following additional technical features:

[0016] In the above technical solution, the switch has multiple gears, each access circuit is set corresponding to a gear, and at least one gear is a closed gear.

[0017] In this solution, the switching switch includes multiple gears. By switching to the corresponding gear, different gears correspond to different functions or settings, which are access circuits corresponding to handshake resistors with different resistance values.

[0018] It should be added that since each access circuit is set corresponding to a gear position, this one-to-one setting ensures that when the user selects a specific gear position, the access circuit of the corresponding resistance value can be accurately connected to the circuit. This is to meet the precise requirements of different models for circuit resistance values ​​during charging and discharging. For example, a certain model requires a specific resistance value to determine the charging current and power when charging. By associating the access circuit corresponding to the model with a specific gear position, the user only needs to rotate the knob to that gear position to achieve accurate circuit matching and ensure the normal charging process.

[0019] In addition, by setting at least one gear position to the off gear, a safety protection mechanism can be provided for the system under the effect of the off gear. When the distribution box does not need to perform charging and discharging operations, or when performing equipment maintenance or troubleshooting, the knob switch can be switched to the off gear. When in the off gear, all access circuits are disconnected from the circuit, avoiding accidental charging and discharging caused by misoperation or circuit failure, and ensuring the safety of equipment and personnel.

[0020] The above technical solution also includes: a control unit, which is arranged in a controllable load circuit, and the control unit is used to connect to the remote operation terminal signal. When the switching switch is in the closed position, the control unit responds to the control instruction of the remote operation terminal and connects to one of the multiple access circuits.

[0021] By setting up a control unit and setting it in a controllable load circuit, it can directly operate each access circuit in the circuit. Since the main function of the control unit is to connect to the remote operation terminal signal, it gives the user the ability to remotely control the smart distribution box. Users can operate it at a location far away from the distribution box through remote operation terminals such as mobile phones and computers. For example, when the user is not at home but needs to adjust the charging and discharging mode according to the power status of the electric vehicle or the household electricity demand, the corresponding operation can also be performed, which greatly improves the user experience of the smart distribution box. Users can control the distribution box according to actual needs anytime and anywhere, without being restricted by geographical location.

[0022] When the switch is in the off position, the control unit responds to the control command of the remote operation terminal and connects one of the multiple access circuits. The above solution not only retains the convenience of local manual operation (through the knob switch), but also increases the flexibility of remote control. When the switch is in the off position, local manual operation is restricted, but the remote operation terminal can still control the distribution box through the control unit.

[0023] In the above technical solution, the access circuit includes a charging circuit and a discharging circuit. When the switching switch is in the off position and the intelligent distribution box is in an off-grid state, the control unit responds to the control instruction of the remote operation terminal to connect the charging circuit or the discharging circuit in the access circuit corresponding to the control instruction.

[0024] In this technical solution, the access circuit is mainly divided into a charging circuit and a discharging circuit, so that the intelligent distribution box can clearly realize two different functions. The charging circuit is mainly used to transmit the power of the external power source (such as the power grid) to the electric vehicle to replenish the battery power of the electric vehicle; the discharging circuit is used to transmit the battery power of the electric vehicle to the household load or other electrical equipment to realize the power supply function of the electric vehicle to the external equipment.

[0025] Designing the circuits according to the different characteristics of charging and discharging can optimize the transmission and conversion process of electric energy, reduce energy loss, and improve energy utilization efficiency. When the switch is in the off position and the intelligent distribution box is off-grid, the control unit responds to the control instruction of the remote operation terminal and connects the charging circuit or the discharging circuit corresponding to the control instruction in the access circuit. When the intelligent distribution box is off-grid, the local manually operated switch is in the off position. In this case, the distribution box can still be controlled by the remote operation terminal to connect the charging circuit or the discharging circuit.

[0026] When the switch is turned off, local manual operation is prohibited, which is a safety measure to prevent local misoperation. Allowing the remote operation terminal to control in this case not only ensures safety, but also provides operational flexibility in special circumstances. This design embodies the synergy of safety and remote control functions, allowing the intelligent distribution box to be effectively controlled in different states.

[0027] In emergency situations such as off-grid situations, users can realize charging or discharging functions through remote operation, provide emergency power support for the family or ensure the charging needs of electric vehicles, improving the emergency guarantee capability of household electricity use.

[0028] The above technical solution also includes: a return device electrically connected to the control unit, and the return device is used to control the switching switch to switch to the closed position; wherein the control unit controls the movement of the return device to switch the switching switch to the closed position in response to the control instruction.

[0029] In this technical solution, a return device electrically connected to the control unit is provided, which can receive a command signal from the control unit to ensure that under specific circumstances (such as system failure, abnormal operation or after completion of charging and discharging operations), the switch can automatically switch to the off position and cut off the circuit connection, thereby avoiding potential safety risks such as leakage, overload, etc.

[0030] Specifically, the control unit controls the movement of the return device in response to the control instruction to switch the switch to the closed position. The control unit controls the action of the return device according to the received control instruction (such as an instruction from the remote operation terminal or a preset instruction within the system).

[0031] In the above technical solution, the multiple access circuits include a charging circuit. When the charging circuit is connected, the electric energy flows to the electric vehicle through the power line of the integrated charging and discharging gun.

[0032] The charging circuit is set up by the intelligent distribution box for the charging function of electric vehicles, ensuring that electrical energy can be effectively transmitted from an external power source (such as the power grid) to the battery of the electric vehicle. Different electric vehicles may have different charging requirements (such as charging power, charging voltage, etc.), and the existence of the charging circuit provides an infrastructure to meet these diverse needs.

[0033] As the physical medium for power transmission, the power line of the integrated charging and discharging gun connects the intelligent distribution box and the electric vehicle, connecting the charging circuit in the distribution box with the charging interface of the electric vehicle to ensure that power can flow smoothly between the two. Since electric vehicles of different brands and models may have different charging interface standards, the power line design of the integrated charging and discharging gun needs to have a certain degree of versatility and be able to adapt to a variety of models.

[0034] In the above technical solution, the multiple access circuits include at least one discharge circuit. When the discharge circuit is connected, the electric energy of the electric vehicle supplies power to at least one controllable load circuit.

[0035] In this solution, the access circuit includes one or more discharge circuits, so that electric vehicles can not only be consumers of electric energy, but also providers of electric energy under certain circumstances, which expands the use scenarios of electric vehicles and improves their energy utilization value. When the power supply of the power grid is interrupted, the electric energy of the electric vehicle can be used to supply power to the controllable load circuit through the discharge circuit, ensuring basic power demand.

[0036] When a home or other place faces a power outage, connecting the discharge circuit allows the electric vehicle's power to flow to the controllable load circuit, providing power support for important loads such as lighting, communication equipment, and small household appliances, ensuring the normal operation of basic life and work during the power outage.

[0037] The above technical solution also includes: an on-grid and off-grid state adjustment device, which is arranged on the control panel, and is used to control the smart distribution box to be in an on-grid state or an off-grid state; wherein, after the smart distribution box is in an off-grid state, a discharge circuit is connected.

[0038] In this technical solution, the on-grid and off-grid status adjustment device is set on the control panel, so that the control panel can obtain and process various information related to the on-grid and off-grid status, such as grid connection status, household load demand, electric vehicle charging and discharging status, etc.

[0039] Due to the proximity to other circuit components of the control board, the relevant control signals can be transmitted and processed more efficiently during the on-grid and off-grid state adjustment process.

[0040] When connected to the grid, the smart distribution box can interact with the external power grid to exchange electric energy and realize functions such as normal charging and supplying power to household loads.

[0041] By controlling the on-grid and off-grid status, the smart distribution box can select the optimal operating mode based on the grid’s electricity price policy, power supply stability, and the actual conditions of household loads and electric vehicles.

[0042] When the smart distribution box is off-grid, the external power grid cannot provide power support. At this time, connecting a discharge loop can immediately start the electric vehicle's power supply function to the household load, ensuring that important loads in the home (such as lighting, refrigerators, etc.) continue to receive power supply during the power outage and maintain the family's basic living needs.

[0043] The above technical solution also includes: a control unit, which is electrically connected to multiple access circuits, and the control unit is used to determine the connectivity status of each access circuit; wherein the control unit is used to respond to the discharge switching instruction of the switching switch when the intelligent distribution box is in an off-grid state and all connectivity states are disconnected, so that the discharge circuit corresponding to the discharge switching instruction in the access circuit is connected.

[0044] By setting up a control unit and electrically connecting the control unit to multiple access circuits, the control unit can directly obtain the electrical parameters and status information of each access circuit. This allows the control unit to accurately determine the connectivity status of each access circuit in real time, including whether it is in an on or off state. The control unit can control the on and off of each access circuit individually according to actual needs, thereby achieving precise regulation of the overall function of the intelligent distribution box.

[0045] The control unit continuously monitors the connectivity status of each access circuit, which is essential to ensure the normal operation of the intelligent distribution box. By understanding the on / off status of each access circuit, the system can determine whether the current circuit configuration meets the expected working mode (such as charging mode or discharging mode).

[0046] When the connectivity of a certain access circuit is abnormal (such as accidental disconnection or short circuit), the control unit can detect it in time and send out the corresponding fault signal. This helps to find and solve potential circuit problems in time and improve the reliability and stability of the system.

[0047] When the smart distribution box is off-grid and all access circuits are disconnected, the system is in a standby state with no power output. At this time, if the user issues a discharge switching command through the switch, the control unit will respond to this command and connect the discharge circuit corresponding to the command in the access circuit. In this way, the electric energy of the electric vehicle can be output through the discharge circuit to provide emergency power support for household loads.

[0048] The design of the switch provides users with an intuitive and convenient manual operation method. In this special case, users can independently decide whether to start the discharge function and select a specific discharge circuit according to actual needs. This flexibility of manual operation is very important in some emergency situations (such as sudden power outages in the power grid and the need to immediately start emergency power supply). It enables users to quickly and directly control the discharge operation of the smart distribution box.

[0049] The above technical solution also includes: a control unit electrically connected to multiple access circuits, and the control unit is used to determine the connectivity status of each access circuit; wherein, when all connectivity statuses are disconnected, in response to a charging switching instruction of the switching switch, the charging circuit in the access circuit is connected.

[0050] In this solution, the control unit determines the connectivity status of each access circuit by detecting the current, voltage and other signals in the access circuit. If there is current passing through, it means that the circuit is in a connected state; conversely, if there is no current passing through, it means that the circuit is in a disconnected state. Then, according to the connectivity status of the access circuit, the system can reasonably adjust the charging and discharging strategy to improve energy utilization efficiency.

[0051] When the connection status of all access circuits is disconnected, there is no charging or discharging operation currently. At this time, the user can issue a charging switching instruction through the switch, and after receiving the instruction, the control unit will connect the charging circuits in the access circuits and start charging the electric vehicle.

[0052] When an electric vehicle is running low on power and needs emergency charging, users can quickly start the charging process by switching on a switch, even if all previously connected circuits were disconnected.

[0053] The present invention also proposes a charging and discharging control method, which is used for any of the above-mentioned intelligent distribution boxes. The switching switch of the intelligent distribution box includes a switching switch with multiple gears, each access circuit is set corresponding to a gear, and at least one gear is a closed gear. The charging and discharging control method includes: when the intelligent distribution box is connected to the electric vehicle through an integrated charging and discharging gun, obtaining charging and discharging instructions; connecting one of the multiple access circuits according to the charging and discharging instructions.

[0054] 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 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), which is a prerequisite for charging and discharging operations. On this basis, the charging and discharging instructions are obtained, which may include charging, discharging, and specific charging or discharging parameters (such as charging current, discharge power, etc.). By obtaining these instructions, the smart distribution box can understand the needs of the electric vehicle and perform corresponding operations.

[0055] According to the acquired charge and discharge instructions, a matching circuit is selected from multiple access circuits for connection. Since each access circuit has a different resistance value, it can adapt to different charging and discharging requirements. By selecting a suitable access circuit, the intelligent distribution box can provide the required charging current or discharge power for the electric vehicle to ensure the safe and efficient charging and discharging process. It realizes precise control of the charging and discharging process of electric vehicles, and can flexibly adjust the access circuit according to different models and charging and discharging requirements, thereby improving the efficiency and quality of charging and discharging.

[0056] It avoids charging and discharging problems caused by mismatched access circuits, such as slow charging speed and unstable discharge, and prolongs the service life of electric vehicle batteries. It also improves the versatility and adaptability of the smart distribution box.

[0057] By accurately obtaining the charge and discharge instructions and selecting the appropriate access circuit according to the instructions, the charge and discharge process can be optimized, the transmission efficiency of electric energy can be improved, and energy loss can be reduced.

[0058] 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.

[0059] In the above technical solution, obtaining the charge and discharge instructions specifically includes: obtaining manual charge and discharge instructions; connecting one of the multiple access circuits according to the charge and discharge instructions, specifically including: when the connection state of each access circuit is disconnected, responding to the charge and discharge switching instruction of the knob switch, connecting the charging circuit or the discharging circuit in the access circuit.

[0060] By obtaining the manual charge and discharge instructions of the electric vehicle, the user can issue the charge and discharge instructions directly on the electric vehicle, which reflects the user's active control over the charge and discharge process. This manual instruction acquisition method enables the user to flexibly decide the charging or discharging operation of the electric vehicle according to their actual needs and usage scenarios.

[0061] Different users may have different electricity needs and schedules. Through manual charging and discharging instructions, users can choose the right time to charge or discharge according to their specific circumstances, such as the remaining power of the electric vehicle, travel plans, etc., to better meet personalized needs.

[0062] When the connection state of each connected circuit is disconnected, in response to the charge and discharge switching instruction of the knob switch, the charging circuit or the discharging circuit in the connected circuit is connected.

[0063] Before switching the charge and discharge circuits, ensure that the connectivity of each access circuit is disconnected, which can avoid current short circuit or other safety problems during the switching process, thereby improving the safety of the charge and discharge operation.

[0064] In response to the charge and discharge switching instructions of the knob switch, the charging circuit or the discharging circuit in the access circuit can be accurately selected and connected. The design of the knob switch allows the user to operate intuitively and select the charging or discharging mode according to actual needs, which improves the accuracy and convenience of operation.

[0065] By disconnecting all access circuits before switching the circuit, the potential safety hazards caused by misoperation or circuit failure are effectively reduced, thus ensuring the safety of users’ lives and property.

[0066] In the above technical solution, obtaining the charge and discharge instructions specifically includes: obtaining remote charge and discharge instructions; connecting one of the multiple access circuits according to the charge and discharge instructions, specifically including: when the switching switch is in the off position, the control unit responds to the control instruction of the remote operation terminal, and connects the charging circuit or the discharging circuit corresponding to the control instruction among the multiple access circuits.

[0067] Obtaining remote charging and discharging instructions enables users to control the charging and discharging process when they are far away from the smart distribution box and electric vehicles. This provides great convenience for users.

[0068] When the switch is in the off position, the control unit responds to the control command of the remote operation terminal to connect the charging circuit or the discharging circuit among the multiple access circuits. When the switch is in the off position, local manual operation is restricted. At this time, the connection of the charging and discharging circuits can be controlled by the remote operation terminal, which not only ensures the safety of local operation (avoiding misoperation) but also provides the flexibility of remote control.

[0069] In some special circumstances, such as when a local emergency occurs (such as fire, electric leakage, etc.) and manual operation becomes unsafe, or when the user forgets to put the knob switch in the correct position, remote operation can still be used to ensure that the charging and discharging needs of the electric vehicle are met, thereby ensuring the charging needs of household electricity or electric vehicles.

[0070] In the above technical solution, when the charge and discharge instruction is a discharge instruction, before connecting one of the multiple access circuits according to the charge and discharge instruction, it also includes: controlling the intelligent distribution box to be in an off-grid state.

[0071] Putting the smart distribution box in an off-grid state can avoid affecting the power grid during the discharge process, and also prevent abnormal conditions of the power grid from interfering with the discharge operation, thereby ensuring the safety and stability of the discharge process. In the off-grid state, the smart distribution box can completely rely on the power of the electric vehicle to power household loads or other devices, realizing the function of the electric vehicle as an independent power source, meeting the emergency power demand in the event of a power outage or other special circumstances.

[0072] Understandably, the off-grid state helps to better control the discharge process.

[0073] In the above technical solution, when the charge and discharge instruction is a discharge instruction, after connecting one of the multiple access circuits according to the charge and discharge instruction, it also includes: obtaining a discharge instruction issued by the electric vehicle; and controlling the electric vehicle to power at least one controllable load circuit according to the discharge instruction.

[0074] In the discharge state, by obtaining the discharge instructions issued by the electric vehicle, various key information about the discharge, such as discharge power, discharge duration, etc., is included, so that the smart distribution box can accurately control the discharge process according to the actual capacity of the electric vehicle and the needs of the user.

[0075] Different electric vehicles may have different discharge characteristics and limitations. By obtaining the discharge instructions issued by them, the smart distribution box can better adapt to the specific conditions of the electric vehicle and achieve collaborative work between the two.

[0076] According to the discharge instruction, the electric vehicle is controlled to supply power to at least one controllable load circuit. According to the discharge instruction, the intelligent distribution box can accurately control the electric vehicle to supply power to a specific controllable load circuit. This helps to distribute power according to user needs and load priority in homes or other power consumption scenarios.

[0077] 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

[0078] Figure 1 A schematic structural diagram of an intelligent distribution box according to an embodiment of the present invention is shown;

[0079] Figure 2 A schematic diagram of the structure of a knob switch according to an embodiment of the present invention is shown;

[0080] Figure 3 A schematic diagram of AC pile charging mode control guidance according to an embodiment of the present invention is shown;

[0081] Figure 4A discharge guiding principle diagram of a vehicle discharge mode according to an embodiment of the present invention is shown;

[0082] Figure 5 The schematic diagram of the structure of the charging and discharging integrated gun head and its connection line in the related art is shown;

[0083] Figure 6 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;

[0084] Figure 7 A schematic diagram of a charge and discharge control logic flow according to an embodiment of the present invention is shown;

[0085] Figure 8 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;

[0086] Fig. 9 A schematic diagram showing a structure in which a control unit is connected to multiple access loops according to an embodiment of the present invention;

[0087] Fig.10 A schematic diagram showing a structure in which a control unit is connected to an on-grid or off-grid state adjustment device according to an embodiment of the present invention;

[0088] Fig.11 A schematic diagram of the structure of a knob switch according to an embodiment of the present invention is shown;

[0089] Fig.12 A schematic diagram of a circuit topology of multiple access loops according to an embodiment of the present invention is shown;

[0090] Fig.13 A schematic flow chart of a charge and discharge control method according to an embodiment of the present invention is shown.

[0091] in, Figures 1 to 13 The corresponding relationship between the reference numerals and the component names is as follows:

[0092] 100: intelligent distribution box; 102: load metering board; 1022: controllable load circuit; 1042: switching switch; 105: access circuit; 1052: charging circuit; 1054: discharging circuit; 106: charging and discharging gun; 1062: signal line; 1064: power line; 108: control board; 110: knob switch; 1102: closing gear; 112: control unit; 114: return device; 116: on-grid and off-grid state adjustment device; 118: handshake resistor. DETAILED DESCRIPTION

[0093] 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.

[0094] 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.

[0095] Refer to the following Figures 1 to 13 An intelligent distribution box and a charge-discharge control method provided according to some embodiments of the present invention are described.

[0096] like Figure 1 and Figure 8 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 a plurality of controllable load circuits 1022 mainly divide the load of the distribution box into circuits, so as to facilitate the separate control and management of different loads. For example, loads of different powers and different importance (such as lighting circuits, high-power electrical circuits, etc.) can be distinguished so as to reasonably allocate power resources in different charging and discharging scenarios.

[0097] The flexibility of the distribution box in load management is improved, and it can better adapt to complex power demand. For example, when electric vehicles are discharging, the power supply of important loads can be prioritized.

[0098] like Figure 6 As shown, by limiting at least one controllable load circuit 1022 to include a switching switch 1042 and multiple access circuits 105, and the resistance value of the handshake resistor 118 set in the access circuit 105 is different, because different car models have different requirements for the resistance value in the circuit during charging and discharging, by limiting the access circuit to include a charging circuit and a discharging circuit, the handshake resistor 118 of the discharge circuit is related to the model of the electric vehicle. Through the above settings, the user can manually operate the switching switch 1042 or remotely control the switching switch 1042 to select a suitable access circuit 105 for connection according to the model of the electric vehicle and the charging and discharging requirements, thereby adapting to the charging and discharging requirements of different car models.

[0099] The access loop 105 with different resistance values ​​is selected to match the charging and discharging systems of different models. For example, the charging and discharging control systems of different models may determine the parameters of charging or discharging (such as current, power, etc.) by detecting the resistance value in the circuit. By providing a variety of resistance value options, it can be ensured that the intelligent distribution box 100 is compatible with the charging and discharging operations of various models. It can be understood that when charging, the handshake resistors 118 of electric vehicles of different models are the same, and when discharging, there will be differentiated handshake resistors 118 according to the different models. By transferring the integrated resistance originally located on the charging gun or the discharge gun to the inside of the distribution box, the versatility of the intelligent distribution box 100 is greatly improved, and it can be compatible with electric vehicles of various models, expanding the scope of application of the product.

[0100] In actual applications, users can easily perform simple switching operations according to their own vehicle models without the need for complicated circuit modifications or additional equipment, which improves the user experience.

[0101] The charging and discharging gun 106 is connected to the load metering board 102 through a signal line 1062, so that the charging and discharging gun 106 can exchange information with the load metering board 102. For example, the charging and discharging gun 106 can transmit the status information of the electric vehicle (such as battery power, charging and discharging capacity, etc.) to the load metering board 102, and can also receive control instructions from the load metering board 102 (such as starting charging, stopping discharging, etc.).

[0102] By limiting the connection between the power line 1064 and the controllable load circuit, a power transmission channel between the electric vehicle and the distribution box is established. Figure 8 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).

[0103] In addition, the control board 108 is electrically connected to the load metering board 102. The control board 108 can obtain various information on the load metering board 102, such as the current, voltage and other parameters of each load circuit, and can also send control instructions to the load metering board 102. This enables the control board 108 to comprehensively monitor and manage the load conditions of the entire distribution box. Centralized control and management of the distribution box load is achieved, and the intelligence level of the system is improved. For example, when charging an electric car, the control board 108 can reasonably adjust the charging power according to the information fed back by the load metering board 102 to avoid affecting other household loads; when discharging, the discharge power can be controlled according to the load demand to ensure a stable supply of electricity.

[0104] The control board 108 can monitor the working status of the charging and discharging integrated gun 106 in real time, including the connection status (whether it is correctly connected to the electric vehicle), charging and discharging current, voltage and other parameters.

[0105] For example, if the connection of the charging and discharging integrated gun 106 is detected to be abnormal (such as looseness, short circuit, etc.), an alarm can be issued in time and corresponding measures can be taken (such as stopping the charging and discharging operation). The safety and reliability of the system are improved, and various problems in the charging and discharging process can be discovered and handled in time, protecting the safety of electric vehicles and household distribution box equipment.

[0106] The control panel 108 can also control the charging and discharging gun 106 to charge or discharge the electric vehicle. According to the user's settings, the state of the electric vehicle, and the needs of the household load, the control panel 108 can send instructions to the charging and discharging gun 106 to switch the charging and discharging functions. For example, when the power grid is sufficient and the battery power of the electric vehicle is low, the control panel 108 can control the charging and discharging gun 106 to charge the electric vehicle; when the household power outage occurs and the battery power of the electric vehicle is sufficient, the control panel 108 can control the charging and discharging gun 106 to discharge the electric vehicle to the household load.

[0107] In one embodiment, optionally, the switch 1042 is a knob switch 110 with multiple gears. The knob switch 110 is a physical switch, and the user can easily switch to the corresponding gear by rotating the knob according to the model of the electric vehicle and the specific charging and discharging requirements. This design is similar to the FM knob of a radio, and different gears correspond to different functions or settings, which here correspond to access circuits 105 with different resistance values. It can be understood that compared with other complex switching methods, the knob switch 110 is simple to operate and does not require special tools or expertise. The user can quickly switch between different gears, which improves the operating efficiency, especially when it is necessary to frequently switch the charging and discharging mode or change different models for charging and discharging, this convenience is more obvious.

[0108] It should be added that, since each access circuit 105 is set corresponding to a gear position, this one-to-one setting ensures that when the user selects a specific gear position, the access circuit 105 of the corresponding resistance value can be accurately connected to the circuit. This is to meet the precise requirements of different vehicle models for circuit resistance values ​​during charging and discharging. For example, a certain vehicle model requires a specific resistance value to determine the charging current and power during charging. By associating the access circuit 105 corresponding to the vehicle model with a specific gear position, the user only needs to rotate the knob to the gear position to achieve accurate circuit matching and ensure the normal progress of the charging process.

[0109] In addition, if Figure 2 As shown, by setting at least one gear position as the closing gear 1102, a safety protection mechanism can be provided for the system under the action of the closing gear 1102. When the distribution box does not need to perform charging and discharging operations, or when performing equipment maintenance or troubleshooting, the knob switch 110 can be switched to the closing gear 1102. When in the closing gear 1102, all access loops 105 are disconnected from the circuit, avoiding accidental charging and discharging caused by misoperation or circuit failure, and ensuring the safety of equipment and personnel.

[0110] In one embodiment, optionally, Fig. 9 As shown, by setting a control unit 112 and setting it in a controllable load loop, it can directly operate each access loop 105 in the loop. Since the main function of the control unit 112 is to connect with the remote operation terminal signal, the user is given the ability to remotely control the smart distribution box 100. The user can operate it at a location far away from the distribution box through a remote operation terminal such as a mobile phone or computer (such as a special smart home APP or web control interface). For example, when the user is not at home but needs to adjust the charging and discharging mode according to the power status of the electric vehicle or the household power demand, the corresponding operation can also be performed, which greatly improves the user's experience of using the smart distribution box 100. The user can control the distribution box according to actual needs anytime and anywhere, without being restricted by geographical location.

[0111] When the switch 1042 is in the closed position 1102, the control unit 112 responds to the control command of the remote operation terminal and connects one of the multiple access loops 105. The above solution not only retains the convenience of local manual operation (through the knob switch 110), but also increases the flexibility of remote control. When the switch 1042 is in the closed position 1102, the local manual operation is restricted, but the remote operation terminal can still control the distribution box through the control unit 112. For example, when an emergency occurs locally (such as fire, leakage, etc.) and manual operation is unsafe, the distribution box can be controlled through remote operation, or when the user forgets to put the knob switch 110 in the correct position, it can also be corrected through remote operation.

[0112] Under the premise of ensuring safety (local manual operation is invalid when the gear 1102 is closed, avoiding the risk of misoperation), the user is given more control options. This design enables the intelligent distribution box 100 to better adapt to various complex usage scenarios, meeting the user's needs for safety without sacrificing the flexibility brought by remote control.

[0113] In one embodiment, the access circuit 105 is optionally divided into a charging circuit 1052 and a discharging circuit 1054, so that the intelligent distribution box 100 can clearly realize two different functions. The charging circuit 1052 is mainly used to transmit the electric energy of the external power source (such as the power grid) to the electric vehicle to replenish the battery power of the electric vehicle; the discharging circuit 1054 is used to transmit the battery power of the electric vehicle to the household load or other electrical equipment to realize the power supply function of the electric vehicle to the external equipment.

[0114] In different usage scenarios, users have different requirements for charging and discharging. For example, when the grid power is sufficient and the electric vehicle power is low, the charging circuit 1052 needs to be used for charging; and when the household power is off and the electric vehicle power is sufficient, the discharging circuit 1054 needs to be used to power the household load. By distinguishing between the charging circuit 1052 and the discharging circuit 1054, the intelligent distribution box 100 can better meet these diverse needs.

[0115] By designing the circuits according to the different characteristics of charging and discharging, the transmission and conversion process of electric energy can be optimized, energy loss can be reduced, and energy utilization efficiency can be improved. For example, the charging circuit 1052 can adopt a suitable charging strategy (such as constant current charging, constant voltage charging, etc.) according to the charging requirements of the electric vehicle, and the discharging circuit 1054 can adjust the discharge power according to the characteristics of the household load, thereby achieving efficient utilization of energy.

[0116] When the switching switch 1042 is in the closed position 1102 and the smart distribution box 100 is in an off-grid state, the control unit 112 responds to the control instruction of the remote operation terminal to connect the charging circuit 1052 or the discharging circuit 1054 corresponding to the control instruction in the access circuit 105. When the smart distribution box 100 is in an off-grid state (for example, a power outage due to a household power grid failure), the locally manually operated switching switch 1042 is in the closed position 1102. In this case, the distribution box can still be controlled by the remote operation terminal to connect the charging circuit 1052 or the discharging circuit 1054.

[0117] For example, if an electric vehicle needs to be charged urgently (there may be a backup power source available for charging), or if an electric vehicle needs to be used to power critical household loads (such as refrigerators, emergency lighting, etc.), this can be achieved through remote operation.

[0118] When the switch 1042 is turned off at position 1102, local manual operation is prohibited, which is a safety measure to prevent local misoperation. Allowing the remote operation terminal to control in this case not only ensures safety, but also provides operational flexibility in special circumstances. This design embodies the coordination of safety and remote control functions, so that the intelligent distribution box 100 can be effectively controlled in different states.

[0119] In emergency situations such as off-grid situations, users can realize charging or discharging functions through remote operation, provide emergency power support for the family or ensure the charging needs of electric vehicles, improving the emergency guarantee capability of household electricity use.

[0120] In one embodiment, optionally, Fig.11 As shown, by setting a return device 114 electrically connected to the control unit 112, the return device 114 can receive a command signal from the control unit 112 to ensure that under specific circumstances (such as system failure, abnormal operation or after completing the charging and discharging operation), the knob switch 110 can automatically switch to the closing position 1102 to cut off the circuit connection, thereby avoiding potential safety risks such as leakage, overload, etc.

[0121] Specifically, the control unit 112 controls the return device 114 to move in response to the control instruction so that the knob switch 110 switches to the closed position 1102. The control unit 112 controls the action of the return device 114 according to the received control instruction (such as an instruction from the remote operation terminal or a preset instruction within the system).

[0122] In one embodiment, optionally, a charging circuit 1052 is provided for the charging function of the electric vehicle to ensure that electric energy can be effectively transmitted from an external power source (such as a power grid) to the battery of the electric vehicle. Different electric vehicles may have different charging requirements (such as charging power, charging voltage, etc.), and the existence of the charging circuit 1052 provides an infrastructure for meeting these diverse requirements.

[0123] like Figure 6 As shown, the power line 1064 of the integrated charging and discharging gun 106 serves as a physical medium for power transmission, connecting the intelligent distribution box 100 and the electric vehicle, connecting the charging circuit 1052 in the distribution box with the charging interface of the electric vehicle, and ensuring that power can flow smoothly between the two. Since electric vehicles of different brands and models may have different charging interface standards, the design of the power line 1064 of the integrated charging and discharging gun 106 needs to have a certain degree of versatility and be able to adapt to a variety of vehicle models.

[0124] In one embodiment, the access circuit 105 optionally includes one or more discharge circuits 1054, so that the electric vehicle can not only be a consumer of electric energy, but also a provider of electric energy under certain circumstances, which expands the use scenarios of electric vehicles and improves their energy utilization value. When the power supply of the power grid is interrupted, the electric energy of the electric vehicle can be used to supply power to the controllable load circuit through the discharge circuit 1054, ensuring basic power demand.

[0125] When a home or other place faces a power outage, connecting the discharge circuit 1054 can allow the electric energy of the electric vehicle to flow to the controllable load circuit, providing power support for important loads such as lighting, communication equipment, small household appliances, etc., ensuring the normal operation of basic life and work during the power outage.

[0126] In one embodiment, optionally, Fig.10 As shown, the on-grid and off-grid state adjustment device 116 is set on the control board 108, so that the control board 108 can obtain and process various information related to the on-grid and off-grid state, such as the grid connection state, household load demand, electric vehicle charging and discharging state, etc.

[0127] Due to the proximity of other circuit elements of the control board 108, the relevant control signals can be transmitted and processed more efficiently during the on-grid and off-grid state adjustment process. For example, when it is necessary to switch from the on-grid state to the off-grid state, the control board 108 can quickly pass the instruction to the on-grid and off-grid state adjustment device 116, and the on-grid and off-grid state adjustment device 116 can also timely feed back its own state information to the control board 108 so that the control board 108 can make further decisions.

[0128] In the grid-connected state, the smart distribution box 100 can interact with the external power grid to exchange electric energy and realize normal charging and power supply to household loads. For example, when the power grid is sufficient, the smart distribution box 100 can transmit the power of the grid to the electric vehicle for charging and supply power to the household loads at the same time. In the off-grid state, the smart distribution box 100 can operate independently, mainly relying on the discharge of the electric vehicle to provide power support for the household load. This function enables the smart distribution box 100 to adapt to different power grid environments, and can guarantee the household's electricity needs whether the power grid is operating normally or in the event of a fault (such as a power outage).

[0129] By controlling the on-grid and off-grid states, the smart distribution box 100 can select the optimal operation mode according to the power grid's electricity price policy, power supply stability, and the actual conditions of household loads and electric vehicles. For example, when the difference between the peak and valley electricity prices of the power grid is large, the distribution box can be set to the on-grid charging state during the valley power period to charge the electric vehicle to reduce the electricity cost; when the power grid is out of power, it can be switched to the off-grid state to use the electric energy of the electric vehicle to power the household load, thereby realizing the rational use of energy.

[0130] When the smart distribution box 100 is off-grid, the external power grid cannot provide power support. At this time, connecting a discharge loop 1054 can immediately start the electric vehicle's power supply function to the household loads, ensuring that important loads in the home (such as lighting, refrigerators, etc.) continue to receive power supply during the power outage to maintain the family's basic living needs.

[0131] In one embodiment, optionally, by providing a control unit 112 and electrically connecting the control unit 112 to multiple access loops 105, the control unit 112 can directly obtain the electrical parameters and status information of each access loop 105. This enables the control unit 112 to determine the connectivity status of each access loop 105 in real time and accurately, including whether it is in an on or off state. The control unit 112 can control the on and off of each access loop 105 individually according to actual needs, thereby achieving precise regulation of the overall function of the intelligent distribution box 100.

[0132] The control unit 112 continuously monitors the connectivity status of each access loop 105. By understanding the connectivity status of each access loop 105, the system can determine whether the current circuit configuration meets the expected working mode (such as charging mode or discharging mode).

[0133] When the connectivity of a certain access loop 105 is abnormal (such as accidental disconnection or short circuit), the control unit 112 can detect it in time and send a corresponding fault signal, which helps to find and solve potential circuit problems in time and improve the reliability and stability of the system.

[0134] When the intelligent distribution box 100 is off-grid and all access circuits 105 are originally disconnected, the system is in a standby state with no power output. At this time, if the user issues a discharge switching instruction through the knob switch 110, the control unit 112 will respond to the instruction and connect the discharge circuit 1054 corresponding to the instruction in the access circuit 105. In this way, the electric energy of the electric vehicle can be output through the discharge circuit 1054 to provide emergency power support for household loads.

[0135] The design of the knob switch 110 provides the user with an intuitive and convenient manual operation mode. In this special case, the user can independently decide whether to start the discharge function and select a specific discharge circuit 1054 according to actual needs. This flexibility of manual operation enables the user to quickly and directly control the discharge operation of the intelligent distribution box 100 in some emergency situations (such as a sudden power outage in the power grid and the need to immediately start emergency power supply).

[0136] In one embodiment, the control unit 112 can optionally determine the connectivity status of each access loop 105 by detecting signals such as current and voltage in the access loop 105. If current passes through, it means that the loop is in a connected state; conversely, if no current passes through, it means that the loop is in a disconnected state. The system can then reasonably adjust the charging and discharging strategy according to the connectivity status of the access loop 105 to improve energy efficiency.

[0137] When the connection status of all access circuits 105 is disconnected, no charging or discharging operation is currently being performed. At this time, the user can issue a charging switching instruction through the knob switch 110, and after receiving the instruction, the control unit 112 will connect the charging circuit 1052 in the access circuit 105 to start charging the electric vehicle.

[0138] When the electric vehicle is low on power and needs emergency charging, the user can quickly start the charging process through the knob switch 110 even if all access circuits 105 are previously disconnected.

[0139] The present invention also provides a charge and discharge control method for any of the above-mentioned intelligent distribution boxes, wherein the switch of the intelligent distribution box includes a knob switch with multiple gears, each access circuit is set corresponding to a gear, and at least one gear is a closed gear, such as Fig.13 As shown, the charge and discharge control method includes: step S102: when the intelligent distribution box is connected to the electric vehicle through a charge and discharge integrated gun, obtaining a charge and discharge instruction; step S104: connecting one of the multiple access loops according to the charge and discharge instruction.

[0140] When the smart distribution box is connected to the electric vehicle through the charging and discharging gun, the charging and discharging instructions are obtained to ensure that a physical connection is established between the smart distribution box and the electric vehicle (through the charging and discharging gun), which is a prerequisite for charging and discharging operations. On this basis, the charging and discharging instructions are obtained, which may include charging, discharging, and specific charging or discharging parameters (such as charging current, discharge power, etc.). By obtaining these instructions, the smart distribution box can understand the needs of the electric vehicle and perform corresponding operations.

[0141] According to the acquired charge and discharge instructions, a matching circuit is selected from multiple access circuits for connection. Since each access circuit has a different resistance value, it can adapt to different charging and discharging requirements. By selecting a suitable access circuit, the intelligent distribution box can provide the required charging current or discharge power for the electric vehicle to ensure the safe and efficient charging and discharging process. It realizes precise control of the charging and discharging process of electric vehicles, and can flexibly adjust the access circuit according to different models and charging and discharging requirements, thereby improving the efficiency and quality of charging and discharging.

[0142] It avoids charging and discharging problems caused by mismatched access circuits, such as slow charging speed and unstable discharge, and prolongs the service life of electric vehicle batteries. It also improves the versatility and adaptability of the smart distribution box.

[0143] By accurately obtaining the charge and discharge instructions and selecting the appropriate access circuit according to the instructions, the charge and discharge process can be optimized, the transmission efficiency of electric energy can be improved, and energy loss can be reduced.

[0144] 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.

[0145] Further, obtaining charging and discharging instructions specifically includes: obtaining manual charging and discharging instructions; connecting one of multiple access circuits according to the charging and discharging instructions, specifically including: when the connection state of each access circuit is disconnected, responding to the charging and discharging switching instruction of the knob switch, connecting the charging circuit or the discharging circuit in the access circuit.

[0146] By obtaining the manual charge and discharge instructions of the electric vehicle, the user can issue the charge and discharge instructions directly on the electric vehicle, which reflects the user's active control over the charge and discharge process. This manual instruction acquisition method enables the user to flexibly decide the charging or discharging operation of the electric vehicle according to their actual needs and usage scenarios.

[0147] Different users may have different electricity needs and schedules. Through manual charging and discharging instructions, users can choose the right time to charge or discharge according to their specific circumstances, such as the remaining power of the electric vehicle, travel plans, etc., to better meet personalized needs.

[0148] When the connection state of each access circuit is disconnected, in response to the charge and discharge switching instruction of the knob switch, the charging circuit or the discharging circuit in the access circuit is connected.

[0149] Before switching the charge and discharge circuits, ensure that the connectivity of each access circuit is disconnected, which can avoid current short circuit or other safety problems during the switching process, thereby improving the safety of the charge and discharge operation.

[0150] In response to the charge and discharge switching instructions of the knob switch, the charging circuit or the discharging circuit in the access circuit can be accurately selected and connected. The design of the knob switch allows the user to operate intuitively and select the charging or discharging mode according to actual needs, which improves the accuracy and convenience of operation.

[0151] By disconnecting all access circuits before switching the circuit, the potential safety hazards caused by misoperation or circuit failure are effectively reduced, thus ensuring the safety of users’ lives and property.

[0152] Furthermore, obtaining charging and discharging instructions specifically includes: obtaining remote charging and discharging instructions; connecting one of multiple access circuits according to the charging and discharging instructions, specifically including: when the switching switch is in the off position, the control unit responds to the control instruction of the remote operation terminal, and connects the charging circuit or the discharging circuit corresponding to the control instruction among the multiple access circuits.

[0153] Obtaining remote charge and discharge instructions enables users to control the charge and discharge process away from the smart distribution box and electric vehicles. This provides great convenience for users. For example, when users are not at home but need to control the charge and discharge according to the power status of the electric vehicle or the household electricity demand, they can send charge and discharge instructions through a remote operation terminal (such as a mobile phone APP). Users can operate the charge and discharge process without being on site, which greatly improves the convenience of use and improves user satisfaction with the entire smart charge and discharge system.

[0154] When the switch is in the off position, the control unit responds to the control command of the remote operation terminal to connect the charging circuit or the discharging circuit among the multiple access circuits. When the switch is in the off position, local manual operation is restricted. At this time, the connection of the charging and discharging circuits can be controlled by the remote operation terminal, which not only ensures the safety of local operation (avoiding misoperation) but also provides the flexibility of remote control.

[0155] In some special circumstances, such as when a local emergency occurs (such as fire, electric leakage, etc.) and manual operation becomes unsafe, or when the user forgets to put the knob switch in the correct position, remote operation can still be used to ensure that the charging and discharging needs of the electric vehicle are met, thereby ensuring the charging needs of household electricity or electric vehicles.

[0156] Furthermore, in the case where the charge and discharge instruction is a discharge instruction, before connecting one of the multiple access loops according to the charge and discharge instruction, it also includes: controlling the intelligent distribution box to be in an off-grid state.

[0157] Putting the smart distribution box in an off-grid state can avoid affecting the power grid during the discharge process, and also prevent abnormal conditions of the power grid from interfering with the discharge operation, thereby ensuring the safety and stability of the discharge process. In the off-grid state, the smart distribution box can completely rely on the power of the electric vehicle to power household loads or other devices, realizing the function of the electric vehicle as an independent power source, meeting the emergency power demand in the event of a power outage or other special circumstances.

[0158] It can be understood that the off-grid state helps to better control the discharge process. For example, the discharge power, voltage, current and other parameters can be adjusted more accurately to adapt to different load requirements and improve the discharge efficiency and energy utilization.

[0159] Furthermore, in the case where the charge and discharge instruction is a discharge instruction, after connecting one of the multiple access circuits according to the charge and discharge instruction, it also includes: obtaining a discharge instruction issued by the electric vehicle; and controlling the electric vehicle to supply power to at least one controllable load circuit according to the discharge instruction.

[0160] In the discharge state, by obtaining the discharge instructions issued by the electric vehicle, various key information about the discharge, such as discharge power, discharge duration, etc., is included, so that the smart distribution box can accurately control the discharge process according to the actual capacity of the electric vehicle and the needs of the user.

[0161] Different electric vehicles may have different discharge characteristics and limitations. By obtaining the discharge instructions issued by them, the smart distribution box can better adapt to the specific conditions of the electric vehicle and achieve collaborative work between the two.

[0162] According to the discharge instruction, the electric vehicle is controlled to supply power to at least one controllable load circuit. According to the discharge instruction, the intelligent distribution box can accurately control the electric vehicle to supply power to a specific controllable load circuit. This helps to distribute power according to user needs and load priority in homes or other power usage scenarios. For example, important loads (such as refrigerators, emergency lighting, etc.) can be powered first to ensure the normal operation of key equipment in situations such as power outages.

[0163] 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 (V2L) on the market, which can realize the function of electric vehicles discharging loads. The principle is to use the gun line to the power strip device to allow the car to recognize the discharge demand on the gun line, so that the OBC on the car can continuously output power to the power strip.

[0164] 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 relatively low power, generally only 3.6kW of external discharge power. This solution integrates AC charging piles and AC discharge equipment, and designs different gears on the charging piles to be compatible with different vehicle models. At the same time, it integrates the home distribution box, so that electric vehicles can directly power the home distribution box, so that when the home power outage occurs, the electric vehicles can continuously power the electrical equipment in the house.

[0165] like Figure 3 As shown, Figure 3This is the control guidance schematic diagram of the AC charging mode. When the voltage at the charging pile detection point four 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 power supply interface CP 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.

[0166] 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.

[0167] like Figure 4 As shown, Figure 4 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.

[0168] 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:

[0169] Charging and discharging conditions of different models Rc resistance 7~12KW charging 150Ω The first type of vehicle discharge 75Ω The second type of vehicle discharge 2KΩ Other models 3.3KΩ

[0170] Among them, the first model may be an electric car of Hyundai Motor, and the second model may be an electric car of BYD.

[0171] 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 5 shown.

[0172] In order to adapt to the charging and discharging switching of electric vehicles and 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 the distribution box is connected in parallel with different resistors in the above table. Then the user can manually switch the Rc resistor according to their own model and different charging and discharging requirements. The specific schematic diagram is as follows Figure 6 As shown, Rc is embedded in the distribution box, and the four resistors with different resistance values ​​(150Ω, 75Ω, 2KΩ, 3.3KΩ) in the above table are connected in parallel and a manual switch is used to connect one of the resistors to the loop. The user can switch the resistor connected to the loop 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. The above functions are specifically implemented through Fig.12 Schematic diagram of the implementation, Fig.12 The specific circuit topology diagram of the charging circuit and multiple discharging circuits is shown in FIG.

[0173] like Figure 7 As shown, a control logic is proposed, including: step S202: confirming the use demand; step S204: judging whether to charge or discharge; step S2062: determining whether the distribution box charges the electric vehicle; step S2082: in the case of manual switch control, executing step S2102: confirming that the four control pins of the MCU are set to a low level; step S2122: connecting the AC gun line to the electric vehicle, manually switching the switch to the charging gear, when the pp samples the voltage corresponding to the charging resistor, the MCU starts to communicate with the vehicle end through the PWM handshake signal and controls the relay to charge; step S2084: in the case of remote control through the MCU, executing step S2104: ensuring that the knob switch is in the off gear; step S2124: the AC gun line and the electric vehicle are successfully connected, and the MCU is controlled to make V2L_4 at a high level. When the pp 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. Step S2064: Determine that the tram discharges the distribution box; Step S2086: Under manual switch control, execute step S2106: Confirm that the four control pins of the MCU are set to a low level and the distribution box is off-grid; Step S2126: The AC gun line completes the connection with the electric vehicle, and uses the manual switch to adjust to the discharge position of the corresponding vehicle model; Step S2088: Under remote control through the MCU, execute step S2108: First, ensure that the knob switch is in the off position and the distribution box is off-grid; Step S2128: The AC gun completes the connection with the tram, and controls the MCU to turn on the corresponding circuit according to the vehicle model used; Step S214: The tram confirms the discharge operation and discharges.

[0174] First, you need to determine the usage requirements, whether to charge or discharge the vehicle. Regardless of charging or discharging, you can choose to switch manually or use the MCU for remote control. If you use a manual switch to control, you must ensure that the 4 control pins of the MCU are all low before control, and then manually switch the resistor according to the actual charging and discharging requirements; similarly, if you want to use the MCU for remote control, you need to confirm that the knob switch is in the OFF position before use, and then control the corresponding circuit conduction according to the needs.

[0175] According to the intelligent distribution box and the charge and discharge control method provided by the present invention, the integrated charge and discharge gun is built into the distribution box, and the discharge and charging of different types of electric vehicles can be realized by switching multiple access circuits.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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 switching switch and a plurality of access circuits, each of the access circuits being provided with a handshake resistor, the resistance values ​​of the handshake resistors in the plurality of access circuits being different, and the switching switch being used to connect one of the plurality of access circuits; A charging and discharging integrated gun, wherein the charging and discharging integrated gun is communicatively connected to the load metering board via a signal line, and a power line of the charging and discharging integrated gun is connected to at least one of the controllable load circuits, the access circuit includes at least part of the signal line, and the charging and discharging integrated gun is used to connect to an electric vehicle; A control board, electrically connected to the load metering board, the control board being used to monitor the integrated charging and discharging gun or control the integrated charging and discharging gun to charge the electric vehicle or discharge the electric vehicle to the intelligent distribution box; Wherein, the access circuit includes a charging circuit and at least one discharging circuit, and the handshake resistance of the discharging circuit is related to the model of the electric vehicle.

2. The intelligent distribution box according to claim 1, characterized in that: The switching switch includes a plurality of gears, each access circuit is arranged corresponding to one of the gears, and at least one of the gears is a closed gear.

3. The intelligent distribution box according to claim 2, characterized in that: Also includes: A control unit is provided in the controllable load circuit, and the control unit is used to be connected to the remote operation terminal signal. When the switching switch is in the closed position, the control unit responds to the control instruction of the remote operation terminal and connects to one of the multiple access circuits.

4. The intelligent distribution box according to claim 3, characterized in that: The access circuit includes a charging circuit and a discharging circuit. When the switching switch is in the off position and the intelligent distribution box is in an off-grid state, the control unit responds to the control instruction of the remote operation terminal to connect the charging circuit or the discharging circuit in the access circuit corresponding to the control instruction.

5. The intelligent distribution box according to claim 3, characterized in that: Also includes: A return device, electrically connected to the control unit, and used to control the switch to switch to the off position; Wherein, the control unit controls the return device to move in response to the control instruction so that the switch is switched to the closing position.

6. The intelligent distribution box according to any one of claims 1 to 5, characterized in that: The multiple access circuits include a charging circuit. When the charging circuit is connected, electric energy flows to the electric vehicle through the power line of the integrated charging and discharging gun.

7. The intelligent distribution box according to any one of claims 1 to 5, characterized in that: The multiple access circuits include at least one discharge circuit. When the discharge circuit is connected, the electric energy of the electric vehicle supplies power to at least one controllable load circuit.

8. The intelligent distribution box according to claim 7, characterized in that: Also includes: A grid-connected or off-grid state adjustment device is provided on the control panel, and is used to control the intelligent distribution box to be in a grid-connected state or an off-grid state; Wherein, after the intelligent distribution box is in an off-grid state, one of the discharge circuits is connected.

9. The intelligent distribution box according to claim 2, characterized in that: Also includes: A control unit, electrically connected to the plurality of access loops, the control unit being used to determine a connectivity status of each of the access loops; The control unit is used for connecting the discharge circuit corresponding to the discharge switching instruction in the access circuit in response to the discharge switching instruction of the switching switch when the intelligent distribution box is in an off-grid state and all the connected states are disconnected.

10. The intelligent distribution box according to claim 2, characterized in that: Also includes: A control unit, electrically connected to the plurality of access loops, the control unit being used to determine a connectivity status of each of the access loops; Wherein, when all the connection states are disconnected, in response to the charging switching instruction of the switching switch, the charging circuit in the access circuit is connected.

11. A charge and discharge control method, characterized in that: The intelligent distribution box according to any one of claims 1 to 10, wherein the switch of the intelligent distribution box comprises a plurality of gears, each access circuit is provided corresponding to one of the gears, and at least one of the gears is a closed gear, and the charge and discharge control method comprises: When the intelligent distribution box is connected to the electric vehicle via a charging and discharging integrated gun, a charging and discharging instruction is obtained; One of the plurality of access circuits is connected according to the charge and discharge instruction.

12. The charge and discharge control method according to claim 11, characterized in that: The obtaining of the charge and discharge instruction specifically includes: Get manual charge and discharge instructions; The connecting one of the plurality of access circuits according to the charge and discharge instruction specifically includes: When the connection state of each of the connected circuits is disconnected, in response to the charge-discharge switching instruction of the switch, the charging circuit or the discharging circuit in the connected circuit is connected.

13. The charge and discharge control method according to claim 11, characterized in that: The obtaining of the charge and discharge instruction specifically includes: Get remote charging and discharging instructions; The connecting one of the plurality of access circuits according to the charge and discharge instruction specifically includes: When the switching switch is in the off position, in response to a control instruction of the remote operation terminal, the charging circuit or the discharging circuit corresponding to the control instruction is connected among the plurality of access circuits.

14. The charge and discharge control method according to any one of claims 11 to 13, characterized in that: In the case where the charge-discharge instruction is a discharge instruction, before connecting one of the plurality of access circuits according to the charge-discharge instruction, the method further includes: The intelligent distribution box is controlled to be in an off-grid state.

15. The charge and discharge control method according to any one of claims 11 to 13, characterized in that: In the case where the charge-discharge instruction is a discharge instruction, after connecting one of the plurality of access loops according to the charge-discharge instruction, the method further includes: Obtaining a discharge instruction issued by the electric vehicle; The electric vehicle is controlled to supply power to at least one of the controllable load circuits according to the discharge instruction.

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