Electric vehicle charging control system and method

Abstract

The invention discloses an electric vehicle charging control system and method, and belongs to the technical field of electric vehicle charging. The system comprises a plurality of charging interfaces (at least divided into a first group and a second group), a state detection unit and a control unit. The state detection unit is used for detecting the gun insertion state of each charging interface; and the control unit controls the two interfaces in the first group not to be charged at the same time and the two interfaces in the second group not to be charged at the same time according to the detection result. The system further comprises a communication detection unit which is used for judging whether the message with the specified ID is continuously received or not and generating a communication state variable according to the message. The control unit combines the gun insertion state variable and the communication state variable to execute differentiated charging control strategies under different working conditions of normal communication or interruption, such as single-port charging is allowed in a delayed manner and all output is closed in an overtime manner, so that the charging safety is improved.

Description

Technical Field

[0001] This application relates to the field of electric vehicle charging technology, and in particular to an electric vehicle charging control system and method. Background Technology

[0002] With the rapid development of new energy vehicles, electric vehicles are increasingly reliant on charging infrastructure. In certain application scenarios, such as bus depots, logistics parks, or shared charging platforms, to improve space utilization and wiring efficiency, an electric vehicle may be equipped with multiple charging ports (such as fast charging ports, slow charging ports, or front and rear dual charging ports). However, if multiple charging ports are simultaneously connected to an external power source for charging, the following problems may arise:

[0003] The simultaneous operation of multiple charging circuits may cause the vehicle's input power to exceed the rated capacity of the on-board charger or battery system, posing a safety hazard of overload or even thermal runaway.

[0004] Connecting charging devices with different charging protocols or voltage levels simultaneously may cause communication problems or hardware damage.

[0005] In a single-battery system architecture, charging multiple ports simultaneously does not improve charging efficiency; instead, it increases system complexity and cost.

[0006] In existing technologies, although some solutions prohibit the simultaneous use of multiple ports through software logic, they often rely on the global judgment of the central controller, lack fine-grained management of the combined state of local interfaces, and lack reliable fault tolerance mechanisms under abnormal conditions such as communication interruption, making it difficult to balance security and availability. Summary of the Invention

[0007] To address the aforementioned issues, this application provides an electric vehicle charging control system and method. The control unit implements interlock control logic for the first and second groups of charging interfaces, meaning that the two interfaces within each group cannot be charged simultaneously, thereby improving charging safety.

[0008] The first technical solution adopted in this application is: providing an electric vehicle charging control system, including:

[0009] Multiple charging ports, including at least a first set of charging ports and a second set of charging ports;

[0010] The status detection unit is used to detect the plug status of each charging port;

[0011] The control unit is connected to the status detection unit;

[0012] The control unit is configured to, based on the detection result of the status detection unit, prevent two interfaces in the first group of charging interfaces from charging simultaneously, and prevent two interfaces in the second group of charging interfaces from charging simultaneously.

[0013] In an optional embodiment, the first set of charging interfaces includes charging port 1 and charging port 3, and the second set of charging interfaces includes charging port 2 and charging port 4.

[0014] In an optional embodiment, the state detection unit is configured to generate a first state variable based on the plug-in state of the first group of charging ports, the first state variable representing the plug-in combination state of the first group of charging ports.

[0015] Furthermore, the state detection unit is configured to generate a second state variable based on the plug-in state of the second group of charging interfaces, wherein the second state variable represents the plug-in combination state of the second group of charging interfaces.

[0016] In an optional embodiment, a communication detection unit is further included, which is used to detect whether a message with a specified ID has been received and to generate a communication status variable; the communication status variable indicates whether a message with the specified ID has been received within a preset time period.

[0017] In an optional embodiment, the control unit is configured to:

[0018] In response to a change in the plug state of any charging port in the first group of charging ports, the charging operation of the first group of charging ports is controlled based on the first state variable and the communication state variable.

[0019] In response to a change in the plug state of any of the charging ports in the second group of charging ports, the charging operation of the second group of charging ports is controlled based on the second state variable and the communication state variable.

[0020] In an optional embodiment, the control unit is configured to:

[0021] When the communication status variable indicates that no message with the specified ID has been received, and the first status variable indicates that only one charging port in the first group of charging ports has a charging gun inserted, the inserted charging port is controlled to enter the charging state after a first preset time.

[0022] In an optional embodiment, the control unit is further configured to:

[0023] When the first state variable or the second state variable indicates that the charging port combination status of the corresponding group of charging ports is no charging port or invalid, and the communication state variable indicates that the message with the specified ID has not been received, a control signal is output to stop charging of all charging ports after the timer exceeds the second preset time.

[0024] In an optional embodiment, the control unit is further configured to:

[0025] When the communication status variable indicates that a message with the specified ID has been received, the charging status of the corresponding group of charging interfaces is controlled based on the first status variable or the second status variable, including:

[0026] If the first state variable indicates that only one charging port in the first group of charging ports has a charging gun plugged in, then control the plugged charging port to enter the charging state.

[0027] If the first state variable indicates that both charging ports in the first group of charging ports are plugged in, then maintain the current charging state.

[0028] If the first state variable indicates that there is no charging gun or the first group of charging ports is in an invalid state, then charging at all charging ports is stopped.

[0029] The second technical solution adopted in this application is: providing a charging control method for electric vehicles, including the following steps:

[0030] The insertion status of multiple charging ports is detected, wherein the multiple charging ports include at least a first group of charging ports and a second group of charging ports.

[0031] Based on the charging port status, the system controls two ports in the first group of charging ports to prevent them from charging simultaneously, and also controls two ports in the second group of charging ports to prevent them from charging simultaneously.

[0032] In an optional embodiment, the control steps include:

[0033] A first state variable is generated based on the plug-in state of the first group of charging ports, and the first state variable represents the plug-in combination state of the first group of charging ports.

[0034] A second state variable is generated based on the plug-in state of the second set of charging ports. The second state variable represents the plug-in combination state of the second set of charging ports.

[0035] Based on the first state variable and the second state variable, control the charging operation of the first group of charging interfaces and the second group of charging interfaces.

[0036] Due to the adoption of the above technical solution, this application has at least one of the following beneficial effects compared with the prior art:

[0037] 1. The control unit implements interlock control logic for the first and second groups of charging interfaces, meaning that the two interfaces in each group cannot be charged at the same time, thus improving charging safety.

[0038] 2. The communication detection unit determines whether a specified ID message is continuously received and distinguishes between two operating modes: normal communication and communication interruption, thereby preventing false triggering and improving operational reliability.

[0039] 3. When an invalid charging port is detected (such as both ports being inserted at the same time but the system does not allow simultaneous charging) or when there is no valid charging request for a long time, the system can actively stop all charging outputs to reduce energy waste and component wear. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] in:

[0042] Figure 1 A schematic diagram of the framework of an electric vehicle charging control system provided in an embodiment of this application;

[0043] Figure 2 This is a schematic flowchart of an electric vehicle charging control method provided in an embodiment of this application. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] With the increasing prevalence of electric vehicles, the demand for intelligent and safe charging equipment is growing. In existing charging systems, multiple charging interfaces are often controlled independently, lacking an effective collaborative management mechanism, which can easily lead to problems such as unreasonable allocation of charging resources, system overload, or charging conflicts. Especially in multi-gun charging scenarios, preventing multiple interfaces under the same power module from charging simultaneously has become crucial for improving system safety and efficiency. This application improves charging safety by setting up a status detection unit and a control unit, and limiting two interfaces in the same group of charging interfaces to not charging simultaneously. Figure 1 As shown, Figure 1 This is a schematic diagram of the framework of an electric vehicle charging control system provided in an embodiment of this application, including multiple charging interfaces, a status detection unit, and a control unit.

[0048] The multiple charging interfaces include at least a first group of charging interfaces and a second group of charging interfaces; in this embodiment, four DC charging interfaces are configured: charging port 1, charging port 2, charging port 3 and charging port 4; wherein, charging port 1 and charging port 3 are divided into the first group, located on the same side of the vehicle or sharing the same charging circuit; charging port 2 and charging port 4 are divided into the second group, serving the other side or backup charging needs; that is, the first group of charging interfaces includes charging port 1 and charging port 3, and the second group of charging interfaces includes charging port 2 and charging port 4.

[0049] The status detection unit is used to detect the insertion status of each charging port; each charging port is equipped with a micro switch or CC / CP signal detection circuit, which constitutes the status detection unit, used to determine in real time whether the charging gun has been inserted into the port. If the charging gun is inserted, it is in the insertion status.

[0050] The control unit is connected to the status detection unit; the status signal is transmitted to the vehicle controller (VCU) or a dedicated charging management module as the control unit; the control unit is configured to: based on the detection results of the status detection unit, prevent two ports in the first group of charging ports from charging simultaneously, and prevent two ports in the second group of charging ports from charging simultaneously; that is, if charging port 1 and charging port 3 in the first group are detected to be plugged in at the same time, only one of them (such as the one that is plugged in first) is allowed to enter the charging process, and the other will not start charging even if it is plugged in; similarly, if charging port 2 and charging port 4 in the second group are plugged in at the same time, they are also prohibited from charging simultaneously; once a port starts charging, the other port in the same group will be locked until the current charging ends, even if it is plugged in later; mutual exclusion of charging ports in the same group can be achieved through software state machine or hardware interlock relay to ensure that dual-path parallel charging cannot be formed at the physical level.

[0051] It should be clarified that in this embodiment, there are two sets of charging interfaces, each set of charging interfaces including two charging ports; in other embodiments, there may be three sets of charging interfaces, four sets of charging interfaces, etc.; each set of charging interfaces may include three charging ports, four charging ports, etc., and no limitation is made in this regard.

[0052] Two charging ports within the same group typically share the same charging circuit or battery input path; if charged simultaneously, the total current may exceed the rated capacity of the cable, relay, or battery system, leading to overheating or even fire. This application fundamentally avoids such risks through mandatory mutual exclusion control. Furthermore, it eliminates the need for a separate, independent charging channel (such as double the DC / DC module or fuse) for each group of ports, allowing for the reuse of some power electronic components while meeting safety requirements, thus saving space and cost.

[0053] The state detection unit is configured to generate a first state variable based on the plug-in state of the first group of charging ports, the first state variable representing the plug-in combination state of the first group of charging ports.

[0054] Furthermore, the status detection unit is configured to generate a second status variable based on the plug-in status of the second set of charging ports, the second status variable representing the plug-in combination status of the second set of charging ports.

[0055] The state detection unit is configured to generate a state variable F based on the plug-in status of charging port 1 and charging port 3, and its logic is as follows:

[0056] If neither charging port 1 nor charging port 3 is plugged in, then F = 0;

[0057] If charging port 1 is not plugged in and charging port 3 is plugged in, then F = 1;

[0058] If charging port 1 is plugged in and charging port 3 is not plugged in, then F = 2;

[0059] If charging port 1 and charging port 3 are both plugged in, then F = 3;

[0060] Otherwise, F = 4.

[0061] The state detection unit is configured to generate a state variable G based on the insertion status of charging port 2 and charging port 4, and its logic is as follows:

[0062] If neither charging port 2 nor charging port 4 is plugged in, then G = 0;

[0063] If charging port 2 is not plugged in and charging port 4 is plugged in, then G = 1;

[0064] If charging port 2 is plugged in and charging port 4 is not plugged in, then G = 2;

[0065] If charging port 2 and charging port 4 are both plugged in, then G = 3;

[0066] Otherwise, G = 4.

[0067] The status variables are sent to the control unit in integer form via an internal bus (such as SPI or CAN). The control unit performs corresponding charging enable, delayed start, or emergency shutdown operations based on the values ​​of F and G and the communication status. For example, when F = 2 (only charging port 1 is plugged in) and communication is normal, the control unit immediately allows charging port 1 to charge. If charging port 3 is subsequently plugged in, F becomes 3, and the control unit maintains charging port 1 but prohibits charging port 3 from starting, thereby achieving interlocking within the group.

[0068] The electric vehicle charging control system also includes a communication detection unit (not shown in the figure), which is used to detect whether a message with a specified ID has been received and to generate a communication status variable. The communication status variable indicates whether a message with a specified ID has been received within a preset time. If a message with a specified ID is received within the preset time, a status variable L is generated. If not received, L = 0; otherwise, L = 1.

[0069] In one embodiment, the communication detection unit is configured to continuously listen for periodic messages from the battery management system (BMS), which has a standard CAN identifier (ID) of 0x350. These messages are sent every 100 milliseconds and contain key information such as battery voltage, current, temperature, and charging permission commands.

[0070] The communication detection unit has a timer and a status register inside, and executes the following logic to generate the communication status variable L:

[0071] If a valid message with ID 0x350 is continuously received within 500 milliseconds (preset time), the communication link is considered to be normal, and L=1.

[0072] If the ID message is not received within 500 milliseconds, or if the received message has a verification error or abnormal content, then communication is considered interrupted, and L=0.

[0073] The state variable L is output to the control unit in real time, and participates in the charging decision together with the plug-in state variables (such as F and G). For example:

[0074] When L=1 (communication is normal) and only one port in the first group is plugged in (F=2), the control unit immediately allows that port to charge;

[0075] When L=0 (communication interrupted) and the second group is in single-plug state (G=1), the control unit starts a 2-second delay confirmation mechanism: if L has not recovered to 1 within 2 seconds, but G is still 1, charging is cautiously allowed; if L recovers to 1 during this period, it is processed according to normal logic.

[0076] If L=0 persists for more than 10 seconds and no guns are plugged into any of the interfaces (F=G=0), the system will disconnect the high-voltage relay and enter a low-power standby mode to prevent accidental operation under unknown battery conditions.

[0077] The control unit is configured as follows:

[0078] In response to a change in the plug state of any charging port in the first group of charging ports, the charging operation of the first group of charging ports is controlled based on a first state variable and a communication state variable.

[0079] In response to a change in the plug state of any charging port in the second group of charging ports, the charging operation of the second group of charging ports is controlled based on the second state variable and the communication state variable.

[0080] When either charging port 1 or charging port 3 is inserted or removed (i.e., the first group of insertion states changes), the status detection unit immediately updates the F value and triggers the control unit to execute the first group of charging control logic. For example:

[0081] If L=1 (communication is normal) and F changes from 0 to 2 (only charging port 1 is plugged in), the control unit immediately outputs a charging enable signal to charging port 1;

[0082] If L=0 (communication interrupted) and F changes from 0 to 3 (dual-port charging), the control unit determines it to be in an invalid or conflicting state, does not start any charging, and may record a fault code.

[0083] Similarly, when either charging port 2 or charging port 4 changes state, the G value is updated, and the control unit makes a second set of charging actions based on G and L. For example:

[0084] If L = 0 and G changes from 0 to 1 (only charging port 4 is plugged in), the control unit starts a 3-second delay timer; if G remains at 1 within 3 seconds and L has not recovered, charging port 4 is cautiously allowed to prevent misjudgment due to momentary interference.

[0085] If L=1 and G=3 (dual-port charging), the control unit maintains the current charging state (if charging port 2 is already charging, it will continue charging; charging port 4 will not start even if it is inserted).

[0086] The control unit is configured as follows:

[0087] When the communication status variable indicates that no message with the specified ID has been received, and the first status variable indicates that only one charging port in the first group of charging ports has been plugged in, the plugged charging port is controlled to enter the charging state after a first preset time.

[0088] If the communication detection unit does not receive the message within 500 milliseconds, it determines that the communication is interrupted and sets the communication status variable L to 0.

[0089] The state detection unit generates a first state variable F based on the insertion status of charging port 1 and port 3: when only charging port 1 is inserted, F = 2; when only charging port 3 is inserted, F = 1.

[0090] The control unit is configured to start a first preset timer (e.g., 3 seconds) when L=0 (communication interruption) and F=1 or F=2 (i.e., only one interface in the first group has a gun inserted).

[0091] During this period, the control unit continuously monitors whether F remains in a single-plug state and L has not yet been restored. If the conditions are still met after 3 seconds (i.e., the plug-in state is stable and communication has not yet been restored), the control unit determines that the operation is the user's true intention rather than a momentary interference, allows the plugged-in interface (such as charging port 1) to enter the charging state, outputs an enable signal to close the corresponding charging relay, and starts the charging process.

[0092] The control unit is also configured as follows:

[0093] When the first or second state variable indicates that the charging port combination of the corresponding group of charging ports is in a state of no charging port or invalid, and the communication state variable indicates that no message with the specified ID has been received, the system outputs a control signal to stop charging of all charging ports after the timer exceeds the second preset time. When the vehicle is parked at the station, the user unplugs all charging guns (F=0, G=0), but CAN communication is interrupted due to BMS failure (L=0). The system will not immediately cut off the power, but will wait 10 seconds to confirm that the state is stable before safely shutting off the charging circuit. This avoids premature shutdown due to misjudgment of instantaneous gun unplugging and also prevents long-term maintenance of high-voltage output in an unsupervised state.

[0094] The control unit is also configured as follows:

[0095] When the communication status variable indicates that a message with a specified ID has been received, the charging status of the corresponding group of charging interfaces is controlled based on either the first or second status variable, including:

[0096] If the first state variable indicates that only one charging port in the first group of charging ports has a charging gun plugged in, then control the plugged charging port to enter the charging state.

[0097] If the first state variable indicates that both charging ports in the first group of charging ports are plugged in, then maintain the current charging state.

[0098] If the first state variable indicates that there is no charging gun or the first group of charging ports is in an invalid state, then charging at all charging ports will be stopped.

[0099] When the user inserts only the charging port 1, the status detection unit outputs F=2 (indicating that only port 1 is plugged in). The control unit recognizes F=1 or 2 and L=1, immediately sends a charging permission command to charging port 1, closes the corresponding relay, and starts the charging process.

[0100] If the user inserts the charger into port 3 while port 1 is charging, F changes to 3 (dual-port charging). Since the system does not allow dual charging in the same group, the control unit does not start charging through port 3, but keeps the existing charging state of port 1 unchanged to avoid interrupting the ongoing legitimate charging process.

[0101] If the user unplugs all charging guns, F=0 and G=0; or if F=4 (invalid state) is caused by sensor failure, the control unit determines that there is no valid charging request or there is an abnormality, and then outputs a control signal to cut off the high voltage output of all charging interfaces to ensure that the system returns to the safe baseline state.

[0102] This application also provides a charging control method for electric vehicles, such as... Figure 2 As shown, Figure 2 A flowchart illustrating an embodiment of the electric vehicle charging control method provided in this application includes the following steps:

[0103] The system detects the plug-in status of multiple charging ports, including at least a first group of charging ports and a second group of charging ports.

[0104] Based on the charging gun status, the system controls two ports in the first group of charging ports to prevent them from charging simultaneously, and also controls two ports in the second group of charging ports to prevent them from charging simultaneously.

[0105] The control steps include:

[0106] A first state variable is generated based on the plug-in state of the first set of charging ports. The first state variable represents the plug-in combination state of the first set of charging ports.

[0107] A second state variable is generated based on the plug-in state of the second set of charging ports. The second state variable represents the plug-in combination state of the second set of charging ports.

[0108] Based on the first state variable and the second state variable, the charging operation of the first set of charging interfaces and the second set of charging interfaces is controlled.

[0109] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0110] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0111] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0112] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A charging control system for electric vehicles, characterized in that, include: Multiple charging ports, including at least a first set of charging ports and a second set of charging ports; The status detection unit is used to detect the plug status of each charging port; The control unit is connected to the status detection unit; The control unit is configured to, based on the detection result of the status detection unit, prevent two interfaces in the first group of charging interfaces from charging simultaneously, and prevent two interfaces in the second group of charging interfaces from charging simultaneously.

2. The system according to claim 1, characterized in that, The first set of charging interfaces includes charging port 1 and charging port 3, and the second set of charging interfaces includes charging port 2 and charging port 4.

3. The system according to claim 1 or 2, characterized in that, The state detection unit is configured to generate a first state variable based on the plug-in state of the first group of charging interfaces, wherein the first state variable represents the plug-in combination state of the first group of charging interfaces. Furthermore, the state detection unit is configured to generate a second state variable based on the plug-in state of the second group of charging interfaces, wherein the second state variable represents the plug-in combination state of the second group of charging interfaces.

4. The system according to claim 3, characterized in that, It also includes a communication detection unit, used to detect whether a message with a specified ID has been received and to generate a communication status variable; the communication status variable indicates whether a message with the specified ID has been received within a preset time period.

5. The system according to claim 4, characterized in that, The control unit is configured to: In response to a change in the plug state of any charging port in the first group of charging ports, the charging operation of the first group of charging ports is controlled based on the first state variable and the communication state variable. In response to a change in the plug state of any of the charging ports in the second group of charging ports, the charging operation of the second group of charging ports is controlled based on the second state variable and the communication state variable.

6. The system according to claim 5, characterized in that, The control unit is configured to: When the communication status variable indicates that no message with the specified ID has been received, and the first status variable indicates that only one charging port in the first group of charging ports has a charging gun inserted, the inserted charging port is controlled to enter the charging state after a first preset time.

7. The system according to claim 5, characterized in that, The control unit is also configured to: When the first state variable or the second state variable indicates that the charging port combination status of the corresponding group of charging ports is no charging port or invalid, and the communication state variable indicates that the message with the specified ID has not been received, a control signal is output to stop charging of all charging ports after the timer exceeds the second preset time.

8. The system according to claim 5, characterized in that, The control unit is also configured to: When the communication status variable indicates that a message with the specified ID has been received, the charging status of the corresponding group of charging interfaces is controlled based on the first status variable or the second status variable, including: If the first state variable indicates that only one charging port in the first group of charging ports has a charging gun plugged in, then control the plugged charging port to enter the charging state. If the first state variable indicates that both charging ports in the first group of charging ports are plugged in, then maintain the current charging state. If the first state variable indicates that there is no charging gun or the first group of charging ports is in an invalid state, then charging at all charging ports is stopped.

9. A charging control method for electric vehicles, characterized in that, Includes the following steps: The insertion status of multiple charging ports is detected, wherein the multiple charging ports include at least a first group of charging ports and a second group of charging ports. Based on the charging port status, the system controls two ports in the first group of charging ports to prevent them from charging simultaneously, and also controls two ports in the second group of charging ports to prevent them from charging simultaneously.

10. The method according to claim 9, characterized in that, The control steps include: A first state variable is generated based on the plug-in state of the first group of charging ports, and the first state variable represents the plug-in combination state of the first group of charging ports. A second state variable is generated based on the plug-in state of the second set of charging ports. The second state variable represents the plug-in combination state of the second set of charging ports. Based on the first state variable and the second state variable, control the charging operation of the first group of charging interfaces and the second group of charging interfaces.

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