Power domain communication system and method and vehicle

Abstract

The invention provides a power domain communication system and method and a vehicle. The system comprises a power domain controller, a standby power domain controller and a power domain component. The power domain component is in communication connection with the power domain controller through the main network segment and the standby network segment; the power domain component is in communication connection with the standby power domain controller through the standby network segment; the power domain controller is in communication connection with the standby power domain controller through the standby network segment; the power domain controller performs signal transmission with the power domain component through the standby network segment under the condition that the main network segment is in a fault; the standby power domain controller performs signal transmission with the power domain component through the standby network segment under the condition that the power domain controller is in a fault state; and the power domain component performs rationality check on the signal transmitted by the standby network segment based on the historical signal transmitted by the main network segment, and executes a power related function after correcting the signal transmitted by the standby network segment based on a check result. The risk of power interruption of the whole vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of automotive communication technology, and in particular to a power domain communication system, method and vehicle. Background Art

[0002] As new energy vehicles become increasingly intelligent and powerful, the requirements for network communication reliability and stability are also becoming higher and higher. However, most current models use point-to-point communication. The core components of the vehicle power system include the power domain controller, battery management system, and drive motor. When the communication of any component fails (including busoff and communication loss), it will lead to power interruption of the entire vehicle, or directly cause the entire vehicle to suffer high voltage, thereby affecting the vehicle's driving safety. Summary of the Invention

[0003] In view of this, embodiments of the present application provide a power domain communication system, method, and vehicle, aiming to reduce the risk of vehicle power interruption.

[0004] A first aspect of an embodiment of the present application provides a power domain communication system, the system comprising: a power domain controller, a backup power domain controller, and a power domain component; the power domain component is communicatively connected to the power domain controller via a primary network segment, and is communicatively connected to the power domain controller via a backup network segment; the power domain component is communicatively connected to the backup power domain controller via a backup network segment; the power domain controller is communicatively connected to the backup power domain controller via a backup network segment; When the main network segment is in a communication failure state, the power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; The backup power domain controller transmits signals with the power domain components via the backup network segment to perform power-related functions when the power domain controller is in a faulty state; The power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the main network segment, and performs power-related functions after correcting the signal transmitted by the backup network segment based on the check result.

[0005] Optionally, the system further includes: The network segment allocation unit is used to select a target network segment as a backup network segment from a dedicated network segment and a shared network segment according to communication interface resources, wherein the shared network segment is a network segment shared with other controllers.

[0006] Optionally, in the case where the vehicle includes two drive motors, the first drive motor control unit is communicatively connected to the power domain controller via a primary network segment, and is communicatively connected to the power domain controller via a backup network segment; the first drive motor control unit is communicatively connected to the backup power domain controller via a backup network segment; and the second drive motor control unit is communicatively connected to the power domain controller via the first network segment; The power domain controller transmits signals with the second drive motor control unit through the first network segment to perform power-related functions.

[0007] Optionally, the system further includes: an intelligent driving control unit, the intelligent driving control unit being communicatively connected to the backup power domain controller, and being communicatively connected to the power domain controller: The intelligent driving control unit determines a virtual accelerator pedal signal corresponding to a driving scenario of the vehicle when the backup power domain controller and the backup network segment are enabled; The backup power domain controller transmits a virtual accelerator pedal signal through the backup network segment to control the driving torque of the vehicle.

[0008] Optionally, the system further includes: A signal receiving component, configured to simultaneously receive signals on the primary network segment and the backup network segment and, based on the signal on the primary network segment, execute power-related functions. The signal receiving component includes a power domain controller, a backup power domain controller, and a power domain component. The power domain component is used to execute power-related functions based on the signal currently transmitted by the backup network segment when the status change signal transmitted through the main network segment is completed.

[0009] Optionally, the system further includes a load rate determination unit and a transmission strategy determination unit: The load rate determining unit is configured to determine the load rate of the enabled standby network segment when the standby network segment is a shared network segment; The transmission strategy determining unit is configured to determine a signal transmission strategy corresponding to the load rate according to the load rate; The power domain controller is configured to perform signal transmission with the power domain components by using the enabled standby network segment and adopting the signal transmission strategy to execute power-related functions; The backup power domain controller is used to perform signal transmission with the power domain components by adopting the signal transmission strategy through the enabled backup network segment in the event of a power domain controller failure, so as to perform power-related functions.

[0010] Optionally, the system further includes: A load ratio comparison unit, configured to compare the load ratio after adopting the signal transmission strategy with a target threshold value to obtain a comparison result; A signal filtering unit is used to filter out power support signals that are not related to control in the power signal when the comparison result shows that the load rate is greater than or equal to the target threshold. The power signal is a signal transmitted between the power domain controller or the backup power domain controller and the power domain component.

[0011] Optionally, the power domain components include a power battery control unit, a generator control unit, and an engine control unit.

[0012] Optionally, the system further includes other controllers, which are communicatively connected to the power domain controller via a main network segment; The other controller is used to control the vehicle in collaboration with the power domain controller through the main network segment.

[0013] Optionally, the system further includes a DC converter and an AC-DC converter, wherein the DC converter and the AC-DC converter are communicatively connected to the power domain controller via a first network segment; The DC converter is configured to execute a corresponding control action according to the control signal received from the power domain controller; The AC-DC converter is used to perform corresponding control actions according to the control signal received from the power domain controller.

[0014] A second aspect of an embodiment of the present application provides a power domain communication method, which is applied to a power domain communication system according to the first aspect of the present application. The method includes: Determine the communication status of the main network segment and the working status of the power domain controller; According to the communication failure status of the main network segment and the normal status of the power domain controller, the power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; According to the fault status of the power domain controller, the backup power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; When the backup network segment is enabled, the power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the primary network segment; Based on the inspection result, the signal transmitted by the backup network segment is corrected by the power domain component, and the power-related function is executed based on the corrected signal.

[0015] A third aspect of an embodiment of the present application provides a vehicle, comprising a power domain communication system as described in the first aspect of the present application.

[0016] The power domain communication system provided by this application has the following advantages: An embodiment of the present application provides a power domain communication system, which includes: a power domain controller, a backup power domain controller, and a power domain component; the power domain component is communicatively connected to the power domain controller through a primary network segment, and is communicatively connected to the power domain controller through a backup network segment; the power domain component is communicatively connected to the backup power domain controller through a backup network segment; when the primary network segment is in a communication failure state, the power domain controller transmits signals to the power domain component through the backup network segment to perform power-related functions; when the power domain controller is in a failure state, the backup power domain controller transmits signals to the power domain component through the backup network segment to perform power-related functions; the power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the primary network segment, and performs power-related functions after correcting the target signal based on the check result. Therefore, the present application adds a backup domain controller and a backup network segment to the existing communication architecture. Even when the main network segment is in a communication failure state, the entire communication architecture can still be used by the power domain controller to transmit signals to the power domain components through the backup network segment, thereby executing power-related functions (such as the vehicle's extended range power generation function, driving function, high-voltage power on and off function, etc.); at the same time, even if the power domain controller fails, the backup power domain controller can be enabled to take over the relevant functions of the power domain controller through the backup network segment, which greatly reduces the risk of power interruption of the entire vehicle, thereby improving the driving safety of the vehicle. At the same time, when the backup network segment is enabled to transmit signals, the power domain components of the present application (such as the power battery control unit, generator control unit, engine control unit, etc.) will compare the signals transmitted within a short period of time after the backup network segment is enabled with the same type of signals transmitted by the main network segment immediately before the backup network segment is enabled to determine whether the signals transmitted after the backup network segment is enabled are reasonable. If they are unreasonable, they will be corrected and the corresponding power-related functions will be executed based on the corrected results, thereby better ensuring the safety of vehicle control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a structural diagram of a power domain communication system shown in one embodiment of the present application; Figure 2 A structural diagram of a power domain communication system including a first network segment is shown as an embodiment of the present application; Figure 3 This is a structural diagram of a power domain communication system including an intelligent driving control unit shown in one embodiment of the present application; Figure 4 This is a structural diagram showing a power domain communication system in which a backup network segment is a shared network segment according to an embodiment of the present application; Figure 5 The present invention is a flowchart of a power domain communication method according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] refer to Figure 1 , Figure 1 This is a structural diagram of a power domain communication system shown in one embodiment of the present application. Figure 1 As shown, the present application provides a power domain communication system, including: a power domain controller, a backup power domain controller, and a power domain component; the power domain component is communicatively connected to the power domain controller through a main network segment, and is communicatively connected to the power domain controller through a backup network segment; the power domain component is communicatively connected to the backup power domain controller through a backup network segment; the power domain controller is communicatively connected to the backup power domain controller through a backup network segment; when the main network segment is in a communication failure state, the power domain controller transmits signals to the power domain component through the backup network segment to perform power-related functions; when the power domain controller is in a failure state, the backup power domain controller transmits signals to the power domain component through the backup network segment to perform power-related functions; the power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the main network segment, and performs power-related functions after correcting the signal transmitted by the backup network segment based on the check result.

[0021] In this embodiment, the present application provides a power domain communication system including a power domain controller, a backup power domain controller and at least one power domain component. In the case where the power domain component includes multiple, such as Figure 1 As shown, each power domain component is communicated with the power domain controller through the main network segment, and each power domain component is communicated with the power domain controller through the backup network segment. At the same time, each power domain component is communicated with the backup power domain controller through the backup network segment, and the power domain controller is communicated with the backup power domain controller through the backup network segment.

[0022] In this embodiment, the power domain controller and the backup power domain controller in the power domain communication system monitor the communication status of the entire communication architecture. If the power domain controller is not faulty but detects a communication failure in the primary network segment, the power domain controller activates the backup network segment and transmits signals to and from the power domain components via the backup network segment to perform power-related functions. These power-related functions include, but are not limited to, vehicle range-extended power generation, driving, and high-voltage power up / down functions. The backup power domain controller determines the operating status of the power domain controller via the backup network segment it is communicating with. If it determines that the power domain controller is faulty, the backup power domain controller activates the backup network segment and transmits signals to and from the power domain components via the backup network segment to perform power-related functions. In this manner, the backup power domain controller takes over the relevant functions of the power domain controller. Upon receiving a signal transmitted by the power domain controller or the backup power domain controller via the backup network segment, the power domain component determines whether the signal is the first signal transmitted since the backup network segment was activated (e.g., after the backup network segment is activated, the first signal transmitted will undergo a plausibility check). If the signal is determined to be the first signal transmitted after the backup network segment is activated, the power domain component performs a rationality check on the first signal transmitted after the backup network segment is activated based on the last signal of the same type received through the primary network segment to determine whether the first signal is reasonable. If the first signal is determined to be reasonable, the power domain component performs the corresponding power-related function based on the first signal. If the first signal is determined to be unreasonable, the first signal is corrected based on the last signal received through the primary network segment, and the power domain component performs the corresponding power-related function based on the corrected first signal. For example, the last torque signal received by the power domain component through the main network segment is 50, and the first torque signal received by activating the backup network segment is 500. The first torque signal 500 is compared with the last torque signal 50, and it is determined that the first torque signal is unreasonable. The power domain component will not have such a large torque mutation between two adjacent torque signals. Therefore, the first torque signal is determined to be unreasonable. Therefore, based on the last torque signal 50 received by the power domain component through the main network segment, the first torque signal is corrected, such as setting the first torque signal to a preset multiple (such as 2 times) of the last torque signal 50. After obtaining the corrected first torque signal 100, the power domain component performs corresponding power-related functions based on the corrected first torque signal.

[0023] In this embodiment, the present application analyzes the impact of communication failures in power domain related components and determines that the related components that need to be designed with network redundancy to reduce the risk of power interruption of the entire vehicle include at least a power domain controller, a power battery control unit, a generator control unit, an engine control unit, and a drive motor control unit. This is because the present application has found through analysis that for the power domain controller, after the network busoff, the power domain controller cannot receive information from all external controllers. Based on torque safety, high voltage safety, and battery safety considerations, the power domain controller will prohibit all functions except fault management. Therefore, in order to reduce the risk of power interruption of the entire vehicle, the present application sets a backup power domain controller for the power domain controller.

[0024] As for the drive motor control unit MCU (Microcontroller Unit), when the communication between the drive motor control unit MCU and the power domain controller is lost, the working status of the drive motor, such as the speed and output torque, is unknown. Continuing to use it may cause unexpected acceleration of the entire vehicle, resulting in a safety accident caused by a collision. Therefore, when the communication between the drive motor control unit MCU and the power domain controller is lost, the MCU needs to stop the torque output to ensure safety. Therefore, in order to reduce the risk of power interruption of the entire vehicle, this application sets a backup network segment for the drive motor control unit, so that the power domain controller can transmit signals with the drive motor control unit through the main network segment or the backup network segment, thereby avoiding the loss of communication between the drive motor control unit and the power domain controller as much as possible. At the same time, even if the communication between the drive motor control unit and the power domain controller is lost, this application can also use the backup power domain controller to transmit signals with the drive motor control unit through the backup network segment to achieve control of the drive motor control unit, thereby further reducing the risk of power interruption of the entire vehicle. Among them, the drive motor control unit mentioned here is for the drive motor control unit of a single-drive motor vehicle, and for a vehicle with dual drive motors, a new implementation method will be provided later to increase the failure risk of the vehicle. The first drive motor control unit in the new implementation method provided later is the same as the drive motor control unit mentioned here. The difference is that for the other drive motor control unit of the vehicle with dual drive motors (hereinafter referred to as the second drive motor control unit), this application will directly control the other drive motor control unit by the power domain controller through a first network segment different from the main network segment and the backup network segment.

[0025] As for the battery management system (BMS), when it detects that the vehicle dynamic control system (VDC) has lost communication with the battery control unit (BMS), the battery's state of charge (SOC), allowed charge and discharge power, fault status, and health status become unknown. Continuing to use the battery may worsen the battery's fault and lead to safety risks such as overvoltage in the vehicle. At this time, it is necessary to limit the charge and discharge power or reduce high voltage to protect the safety of the battery and the vehicle. Therefore, in order to reduce the risk of power outages in the vehicle, this application sets a backup network segment for the battery control unit (BMS) so that the power domain controller can transmit signals to the battery control unit (BMS) through the main network segment or the backup network segment, thereby minimizing communication loss between the battery control unit (BMS) and the power domain controller. Even if communication between the battery control unit (BMS) and the power domain controller is lost, this application can still use the backup power domain controller to transmit signals to the battery control unit (BMS) through the backup network segment to control the battery control unit (BMS), thereby further reducing the risk of power outages in the vehicle.

[0026] Regarding the Generator Control Unit (GCU), if communication between the GCU and the Power Domain Controller (PDC) is lost, the vehicle's actual operating status, including the generator's output power, voltage, and current, becomes unknown. Continuing to operate the generator could result in excessive or insufficient engine torque, leading to uncontrollable engine operation or even stalling. If the GCU's output power exceeds the vehicle's required power, there's a risk of overvoltage in the vehicle's high-voltage circuit or overcharging of the power battery. Therefore, upon detecting a loss of GCU communication, the PDC prohibits the GCU from continuing to operate. To mitigate the risk of vehicle power outages, this application establishes a backup network segment for the GCU. This allows the PDC to communicate with the GCU via either the primary or backup network segment, minimizing communication loss between the GCU and PDC. Furthermore, even if communication between the GCU and PDC is lost, the backup PDC can still communicate with the GCU via the backup network segment to control the GCU, further mitigating the risk of vehicle power outages.

[0027] As for the engine control unit EMS (Engine Management System), when the communication of the engine control unit EMS is lost, the engine output torque and speed information position, and the generator control unit GCU matched with it cannot control the power generation. Continuing to use may cause the speed or torque to exceed the limit, causing the engine to lose control, and at the same time cause the risk of vehicle overvoltage or power battery overcharge, so the engine needs to be shut down. Therefore, in order to reduce the risk of power interruption of the whole vehicle, this application sets a backup network segment for the engine control unit EMS, so that the power domain controller can transmit signals with the engine control unit EMS through the main network segment or the backup network segment, thereby avoiding the loss of communication between the engine control unit EMS and the power domain controller as much as possible. At the same time, even if the communication between the engine control unit EMS and the power domain controller is lost, this application can also use the backup power domain controller to transmit signals with the engine control unit EMS through the backup network segment to achieve control of the engine control unit EMS, thereby further reducing the risk of power interruption of the whole vehicle.

[0028] An embodiment of the present application provides a power domain communication system, which includes: a power domain controller, a backup power domain controller, and a power domain component; the power domain component is communicatively connected to the power domain controller through a primary network segment, and is communicatively connected to the power domain controller through a backup network segment; the power domain component is communicatively connected to the backup power domain controller through a backup network segment; when the primary network segment is in a communication failure state, the power domain controller transmits signals to the power domain component through the backup network segment to perform power-related functions; when the power domain controller is in a failure state, the backup power domain controller transmits signals to the power domain component through the backup network segment to perform power-related functions; the power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the primary network segment, and performs power-related functions after correcting the target signal based on the check result. Therefore, the present application adds a backup domain controller and a backup network segment to the existing communication architecture. Even when the main network segment is in a communication failure state, the entire communication architecture can still be used by the power domain controller to transmit signals to the power domain components through the backup network segment, thereby executing power-related functions (such as the vehicle's extended range power generation function, driving function, high-voltage power on and off function, etc.); at the same time, even if the power domain controller fails, the backup power domain controller can be enabled to take over the relevant functions of the power domain controller through the backup network segment, which greatly reduces the risk of power interruption of the entire vehicle, thereby improving the driving safety of the vehicle. At the same time, when the backup network segment is enabled to transmit signals, the power domain components of the present application (such as the power battery control unit, generator control unit, engine control unit, etc.) will compare the signals transmitted within a short period of time after the backup network segment is enabled with the same type of signals transmitted by the main network segment immediately before the backup network segment is enabled to determine whether the signals transmitted after the backup network segment is enabled are reasonable. If they are unreasonable, they will be corrected and the corresponding power-related functions will be executed based on the corrected results, thereby better ensuring the safety of vehicle control.

[0029] In conjunction with the above embodiments, in one implementation, an embodiment of the present application further provides a power domain communication system. In the power domain communication system, the system further includes: a network segment allocation unit configured to select a target network segment as a backup network segment from a dedicated network segment and a shared network segment based on communication interface resources, where the shared network segment is a network segment shared with other controllers.

[0030] In this embodiment, the backup network segment in this application can be a dedicated network segment or a shared network segment shared with other controllers. Specifically: when the power domain controller is not faulty but detects that the main network segment is in a communication failure state, when the power domain controller enables the backup network segment, the network segment allocation unit in the power domain controller selects a network segment from the dedicated network segment and the shared network segment based on the current communication interface resources of the entire vehicle. The selected network segment is the target network segment, and the selected target network segment is used as the backup network segment for signal transmission between the power domain controller and the power domain components. When the communication interface resources of the entire vehicle are sufficient, a dedicated network segment is selected as the backup network segment for signal transmission between the power domain controller and the power domain components, and when the communication interface resources of the entire vehicle are insufficient, a shared network segment is selected as the backup network segment for signal transmission between the power domain controller and the power domain components. When the standby power domain controller determines that the power domain controller is in a faulty state through a standby network segment that is in communication with the power domain controller, and the standby power domain controller activates the standby network segment to transmit signals with the power domain components, the network segment allocation unit in the standby power domain controller selects a network segment from the dedicated network segment and the shared network segment based on the current vehicle's communication interface resources. The selected network segment is the target network segment, and the selected target network segment is used as the standby network segment for signal transmission between the standby power domain controller and the power domain components. When the vehicle's communication interface resources are sufficient, a dedicated network segment is selected as the standby network segment for signal transmission between the standby power domain controller and the power domain components. When the vehicle's communication interface resources are insufficient, a shared network segment is selected as the standby network segment for signal transmission between the standby power domain controller and the power domain components.

[0031] In combination with the above embodiments, in one embodiment, the present application also provides a power domain communication system. In this power domain communication system, when the vehicle includes two drive motors, the first drive motor control unit is connected to the power domain controller via a primary network segment and is connected to the power domain controller via a backup network segment; the first drive motor control unit is connected to the backup power domain controller via a backup network segment; the second drive motor control unit is connected to the power domain controller via a first network segment; and the power domain controller transmits signals to the second drive motor control unit via the first network segment to perform power-related functions.

[0032] In this embodiment, if Figure 2As shown, in the case where the whole vehicle includes two drive motors, a power domain communication system provided by the present application will set a corresponding drive motor control unit for each drive motor respectively, and the communication connection mode between the first drive motor control unit and the power domain controller and the backup power domain controller is the same as the communication connection mode between the power domain components and the power domain controller and the backup power domain controller mentioned above. At the same time, the communication mode between the first drive motor control unit and the power domain controller and the backup power domain controller is also the same as the communication mode between the power domain components and the power domain controller and the backup power domain controller mentioned above, which will not be repeated here. The first drive motor control unit is communicated with the power domain controller through the main network segment, and is communicated with the power domain controller through the backup network segment. At the same time, the first drive motor control unit is communicated with the backup power domain controller through the backup network segment. The second drive motor control unit is connected to the power domain controller through another first network segment different from the main network segment and the backup network segment. The power domain controller transmits signals with the second drive motor control unit through the first network segment to perform power-related functions.

[0033] In this embodiment, when the synchronous motor rotates, an induced electromotive force is generated. The voltage of this electromotive force increases as the speed increases. If the induced electromotive force exceeds the limit and the drive motor control unit does not have corresponding voltage reduction measures, it may cause an overvoltage fault in the high-voltage circuit of the entire vehicle. Therefore, when the synchronous motor loses communication (the power domain controller cannot receive the working status of the synchronous motor), the power domain controller generally takes the approach of limiting the speed of the entire vehicle. For a vehicle with two or more drive motors, through the power domain communication system of the present application, when the synchronous motor controlled by the first drive motor control unit loses communication on the main network segment, the problem of communication loss on the main network segment can be solved through the backup network segment. At the same time, even if the synchronous motor controlled by the first drive motor control unit loses communication on the backup network segment, the other synchronous motor controlled by the second drive motor control unit can still continue to output torque through the power domain controller and the first network segment, thereby effectively reducing the risk of failure.

[0034] In conjunction with the above embodiments, in one implementation, an embodiment of the present application further provides a power domain communication system. In this power domain communication system, the system further includes: an intelligent driving control unit, the intelligent driving control unit being communicatively connected to the backup power domain controller, and the power domain controller; the intelligent driving control unit, when the backup power domain controller and the backup network segment are enabled, determines a virtual accelerator pedal signal corresponding to the vehicle's driving scenario based on the vehicle's driving scenario; the backup power domain controller transmits the virtual accelerator pedal signal via the backup network segment to control the vehicle's driving torque.

[0035] In this embodiment, the accelerator pedal usually uses 6-way signals. Due to its structural limitations, the accelerator pedal can only be connected to one controller (i.e., the power domain controller). In order to solve the problem that after the backup power domain controller takes over the relevant functions of the power domain controller, the vehicle can be controlled based on the accelerator pedal signal, such as Figure 3 As shown, the power domain communication system provided by the present application also includes an intelligent driving control unit, which is communicatively connected to the backup power domain controller. At the same time, when the backup power domain controller and the backup network segment are enabled, the intelligent driving control unit will determine the virtual accelerator pedal signal corresponding to the driving scenario based on the vehicle's driving scenario. The intelligent driving control unit sends the determined virtual accelerator pedal signal to the backup power domain controller, which in turn transmits the virtual accelerator pedal signal to the corresponding power domain component through the backup network segment, thereby achieving drive torque control of the vehicle. Among them, the vehicle's intelligent driving control unit is the main control unit responsible for the intelligent driving function. Some call it an autonomous driving control unit (ADCU), and some call it an intelligent driving domain controller (IDDC). It is the core module in the vehicle's electronic and electrical architecture that is responsible for integrating sensor data, executing decision algorithms, and controlling vehicle actuators. For example, the intelligent driving control unit determines to obtain a virtual accelerator pedal signal corresponding to the driving scenario by analyzing the vehicle's current location on a congested urban road and the average speed of multiple vehicles in front as well as the safety distance that needs to be maintained, and sends the virtual accelerator pedal signal to the backup power domain controller; and the intelligent driving control unit determines to obtain a virtual accelerator pedal signal corresponding to the driving scenario by analyzing the vehicle's current location on a highway and the average speed of multiple vehicles in front as well as the safety distance that needs to be maintained, and sends the virtual accelerator pedal signal to the backup power domain controller.

[0036] In this embodiment, the intelligent driving control unit is also communicated with the power domain controller to achieve real-time coordination of autonomous driving decision-making and power execution. At the same time, when the backup power domain controller takes over the relevant functions of the power domain controller, the backup power domain controller not only transmits the virtual accelerator pedal signal through the backup network segment to control the driving torque of the vehicle, but also works with the intelligent driving control unit to perform real-time coordination of autonomous driving decision-making and power execution.

[0037] In conjunction with the above embodiments, in one implementation, an embodiment of the present application further provides a power domain communication system. In this power domain communication system, a signal receiving component is configured to simultaneously receive signals on a primary network segment and a backup network segment, and execute power-related functions based on the signal on the primary network segment. The signal receiving component includes a power domain controller, a backup power domain controller, and a power domain component. The power domain component is configured to execute power-related functions based on the signal currently transmitted by the backup network segment when the state change signal transmitted via the primary network segment is completed.

[0038] In this embodiment, since the same signals of the main network segment and the backup network segment are theoretically synchronized and identical, but in reality, affected by factors such as signal priority, transceiver processing capabilities, and electromagnetic interference, the instructions sent by the same signal sending component on the two network segments may arrive at the signal receiving component at the same time, resulting in inconsistent signals. In order to solve this problem, the present application takes the signal on the main network segment as a higher priority signal. If the signal receiving component receives signals on the main network segment and the backup network segment at the same time, it executes and implements power-related functions based on the signal on the main network segment. Specifically, when the signal receiving component receives signals on the main network segment and the backup network segment at the same time, it executes and implements power-related functions based on the signal on the main network segment. The signal receiving component may refer to a power domain controller, a backup power domain controller, or a power domain component.

[0039] In this embodiment, during a vehicle's normal high-voltage power-down process, the battery management system (BMS) first disconnects the high-voltage relay after the current drops to a certain level. After disconnecting the high-voltage relay, the peripheral circuits are actively discharged. The present applicant has discovered that if this discharge process is not followed and high-voltage power-up control is initiated immediately after receiving a high-voltage power-up during a high-voltage power-down process, the BMS will report a high-voltage relay stuck fault, preventing high-voltage power-up. This is because if high-voltage power-up is initiated without completing high-voltage discharge, the detected voltage difference across the high-voltage relay will exhibit sticking characteristics, resulting in a sticking fault report and preventing power-up. To address this issue, the present applicant determines whether the signal transmitted by the primary network segment prior to enabling the backup network segment for signal transmission is a state change signal. If it is a state change signal, the corresponding power-related function will not be immediately executed based on the signal transmitted by the enabled backup network segment. Instead, the corresponding power-related function will be executed based on the signal transmitted by the enabled backup network segment after the state change signal is executed.

[0040] In combination with the above embodiments, in one embodiment, the embodiment of the present application further provides a power domain communication system. In the power domain communication system, the system further includes a load rate determination unit and a transmission strategy determination unit; the load rate determination unit is used to determine the load rate of the enabled standby network segment when the standby network segment is a shared network segment; the transmission strategy determination unit is used to determine the signal transmission strategy corresponding to the load rate according to the load rate; the power domain controller is used to transmit signals with the power domain components through the enabled standby network segment using the signal transmission strategy to perform power-related functions; the standby power domain controller is used to transmit signals with the power domain components through the enabled standby network segment using the signal transmission strategy to perform power-related functions in the event of a power domain controller failure.

[0041] In this embodiment, the backup network segment in the power domain communication system provided by this application may be a network segment shared with other controllers, such as Figure 4 As shown in the figure, the controller used to interact with the suspension control unit, the brake control unit and the power steering control unit shares a network segment with the backup power domain controller and the power domain controller (this network segment is also the backup network segment). In the case where the backup network segment in the power domain communication system provided by the present application is a shared network segment, in order to avoid affecting the control process between the controller and the control unit that originally performs signal transmission on the shared network segment, thereby affecting the original normal control of the vehicle. The power domain communication system provided by the present application will monitor the load condition of the backup network segment shared with other controllers in real time, and adjust the signal transmission strategy of the backup network segment based on the load condition.

[0042] Specifically, the power domain controller includes a load rate determination unit and a transmission strategy unit, and the standby power domain controller also includes a load rate determination unit and a transmission strategy unit. The load rate determination unit is used to determine the load rate of the enabled standby network segment when the enabled standby network segment is a shared network segment, and the transmission strategy determination unit is used to determine the signal transmission strategy corresponding to the load rate based on the load rate determined by the load rate determination unit. An optional implementation method is: as long as the load rate exceeds the set threshold, a signal transmission strategy for reducing the load rate is enabled, and the signal transmission strategy includes but is not limited to increasing the signal period between the power domain controller and the power domain component or the standby power domain controller and the power domain component transmitted through the standby network segment, or the standby network segment uses event triggering to transmit the signal between the power domain controller and the power domain component or the standby power domain controller and the power domain component. The set threshold can be set according to the actual application scenario and is not specifically limited here. In the case where the power domain controller transmits signals to the power domain components through the enabled backup network segment during the signal transmission process, the load rate determination unit and the transmission strategy unit of the power domain controller determine the load rate and the signal transmission strategy corresponding to the load rate. After determining the corresponding signal transmission strategy, the power domain controller sends the corresponding communication parameters to the power domain components to control the power domain components to transmit signals to the power domain controller according to the signal transmission strategy. The power domain controller is used to, after determining the signal transmission strategy corresponding to the load rate, transmit signals to the power domain components through the enabled backup network segment using the signal transmission strategy to perform power-related functions.

[0043] In the case where the standby power domain controller transmits signals to the power domain components through the enabled standby network segment during the signal transmission process (that is, when the power domain controller fails and cannot control the power domain components), the load rate determination unit and the transmission strategy unit of the standby power domain controller determine the load rate and the signal transmission strategy corresponding to the load rate. After determining the corresponding signal transmission strategy, the standby power domain controller sends the corresponding communication parameters to the power domain components to control the power domain components to transmit signals with the standby power domain controller according to the signal transmission strategy. The standby power domain controller is used to perform signal transmission with the power domain components through the enabled standby network segment using the signal transmission strategy after determining the signal transmission strategy corresponding to the load rate to perform power-related functions.

[0044] In conjunction with the above embodiments, in one embodiment, the present application also provides a power domain communication system. In the power domain communication system, the system further includes: a load rate comparison unit, configured to compare the load rate after adopting the signal transmission strategy with a target threshold to obtain a comparison result; and a signal filtering unit, configured to filter out power support signals not related to control from the power signal when the comparison result indicates that the load rate is greater than or equal to the target threshold, wherein the power signal is a signal transmitted between the power domain controller or the backup power domain controller and the power domain components.

[0045] In this embodiment, if the load rate of the backup network segment is still high after a signal transmission strategy to reduce the load rate is adopted between the power domain controller or the backup power domain controller and the power domain component, this application will further reduce the communication load rate between the power domain controller or the backup power domain controller and the power domain component to avoid subsequent impact on the control process between the controller and control unit that originally performed signal transmission on the backup network segment as a shared network segment.

[0046] Specifically, the power domain controller includes a load ratio comparison unit and a signal filtering unit, while the standby power domain controller also includes a load ratio comparison unit and a signal filtering unit. During signal transmission, when the power domain controller transmits signals to the power domain components via an activated standby network segment, the load ratio determination unit of the power domain controller determines the total load ratio of the standby network segment after the signal transmission strategy with a reduced load ratio is adopted. The load ratio comparison unit of the power domain controller compares this total load ratio with a target threshold to obtain a corresponding comparison result. The target threshold is less than or equal to a set threshold used to enable the signal transmission strategy with a reduced load ratio. For example, if the set threshold is 50 and the target threshold is 40, and the load ratio is 60, which is greater than the set threshold of 50, the signal transmission strategy with a reduced load ratio will be adopted for signal transmission. However, the reduced load ratio of 48 is still higher than the target threshold of 40 (i.e., although the current load ratio after the load ratio reduction is lower than the set threshold, it has not reached the desired reduction level, i.e., it has not fallen below the target threshold of 40). Therefore, to prevent the load ratio from subsequently exceeding the set threshold, the load ratio will be further reduced. The signal filtering unit of the power domain controller, when the comparison result determined by the load rate comparison unit of the power domain controller is that the total load rate is greater than or equal to the target threshold, further filters out the power support signals in the power signal that are not related to control, so as to further reduce the load rate of the backup network segment. The power domain controller sends corresponding communication parameters to the power domain components to control the power domain components to not only transmit signals between the power domain controller and the power domain controller according to the signal transmission strategy, but also transmit signals between the power domain controller and the power domain controller according to the filtering strategy (i.e., filtering out the power support signals in the power signal that are not related to control). Among them, the power signal is the signal transmitted between the power domain controller or the backup power domain controller and the power domain component, the power support signal is the fault signal, human-machine display signal, observation signal, etc. related to the power domain, and the control-related signal is the signal related to the extended-range power generation function, the driving function, the high-voltage power on and off function, etc.

[0047] Specifically, during the signal transmission process, when the backup power domain controller transmits signals to the power domain components via an enabled backup network segment, the backup power domain controller's load rate determination unit determines the total load rate of the backup network segment after adopting the signal transmission strategy that reduces the load rate. The backup power domain controller's load rate comparison unit compares the determined total load rate with a target threshold to obtain a corresponding comparison result. The target threshold is less than or equal to the set threshold used to enable the signal transmission strategy that reduces the load rate. The backup power domain controller's signal filtering unit, if the comparison result determined by the backup power domain controller's load rate comparison unit is that the total load rate is greater than or equal to the target threshold, further filters out power support signals unrelated to control in the power signal to further reduce the load rate of the backup network segment. The backup power domain controller issues corresponding communication parameters to the power domain components to control the power domain components to transmit signals to and from the backup power domain controller not only in accordance with the signal transmission strategy, but also in accordance with the filtering strategy (i.e., filtering out power support signals unrelated to control in the power signal).

[0048] In this embodiment, as shown in Table 1 below, Table 1 shows signals related to control.

[0049] Table 1

[0050] In conjunction with the above embodiments, in one implementation, an embodiment of the present application further provides a power domain communication system. In this power domain communication system, the system further includes: another controller, the other controller being communicatively connected to the power domain controller via a primary network segment; the other controller being configured to collaboratively control the vehicle with the power domain controller via the primary network segment.

[0051] In this embodiment, if Figure 4 As shown, a power domain communication system provided by the present application also includes other controllers of the vehicle that are connected to the power domain controller through the main network segment. The other controllers are connected to the power domain controller through the main network segment to collaboratively control the vehicle, wherein the other controllers include at least any one of the chassis domain controller, the body domain controller, the cockpit domain controller, etc.

[0052] In conjunction with the above embodiments, in one implementation, an embodiment of the present application further provides a power domain communication system. In this power domain communication system, the system further includes a DC converter and an AC / DC converter, wherein the DC converter and the AC / DC converter are communicatively connected to a power domain controller via a first network segment; the DC converter is configured to execute corresponding control actions based on control signals received from the power domain controller; and the AC / DC converter is configured to execute corresponding control actions based on control signals received from the power domain controller.

[0053] In this embodiment, if Figure 4 As shown, the power domain communication system provided by the present application further includes a DC converter and an AC-DC converter, which are communicatively connected to the power domain controller via a first network segment. The DC converter receives a control signal sent by the power domain controller via the first network segment and performs corresponding control actions based on the received control signal, such as enabling the DC converter based on the received corresponding control signal, performing corresponding voltage regulation based on the received corresponding control signal, etc. The AC-DC converter receives a control signal sent by the power domain controller via the first network segment and performs corresponding control actions based on the received control signal, such as switching the charging mode based on the received corresponding control signal, dynamically adjusting the charging state based on the received battery SOC (state of charge) signal, etc.

[0054] Based on the same inventive concept, an embodiment of the present application provides a power domain communication method, which is applied to a power domain communication system provided in the first aspect of the present application, such as Figure 5 As shown, the method includes: Step S1: Determine the communication status of the main network segment and the working status of the power domain controller; Step S2: Based on the communication failure status of the primary network segment and the normal status of the power domain controller, the power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; Step S3: Based on the fault status of the power domain controller, the backup power domain controller transmits signals with the power domain components via the backup network segment to perform power-related functions; Step S4: When the backup network segment is enabled, the power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the primary network segment; Step S5: Based on the inspection result, the signal transmitted by the backup network segment is corrected by the power domain component, and power-related functions are executed based on the corrected signal.

[0055] Optionally, the method further includes: selecting a target network segment as a backup network segment from a dedicated network segment and a shared network segment by a network segment allocation unit according to communication interface resources, wherein the shared network segment is a network segment shared with other controllers.

[0056] Optionally, in the case where the vehicle includes two drive motors, the first drive motor control unit, as a power domain component, transmits signals with the power domain controller through the main network segment or the backup network segment, or transmits signals with the backup power domain controller through the backup network segment; The power domain controller transmits signals with the second drive motor control unit through the first network segment to perform power-related functions.

[0057] Optionally, the method further includes: when the backup power domain controller and the backup network segment are enabled, the intelligent driving control unit determines, according to the driving scenario of the vehicle, a virtual accelerator pedal signal corresponding to the driving scenario; The backup power domain controller transmits a virtual accelerator pedal signal through the backup network segment to control the driving torque of the vehicle.

[0058] Optionally, the method further includes: In the case of simultaneously receiving signals on the primary network segment and the backup network segment, the signal receiving component performs power-related functions based on the signal on the primary network segment, and the signal receiving component includes a power domain controller, a backup power domain controller and a power domain component; When the state change signal transmitted through the main network segment is executed, the power domain component performs power-related functions based on the signal currently transmitted by the backup network segment.

[0059] Optionally, the method further includes: In the case where the standby network segment is a shared network segment, the load rate determining unit determines the load rate of the enabled standby network segment; According to the load rate, the transmission strategy determining unit determines a signal transmission strategy corresponding to the load rate; The power domain controller uses the signal transmission strategy to transmit signals to the power domain components through the enabled standby network segment to perform power-related functions; In the event of a power domain controller failure, the backup power domain controller uses the enabled backup network segment and the signal transmission strategy to perform signal transmission with the power domain components to execute power-related functions.

[0060] Optionally, the method further includes: comparing the load rate after adopting the signal transmission strategy with a target threshold value by a load rate comparison unit to obtain a comparison result; When the comparison result shows that the load rate is greater than or equal to the target threshold, the power support signal irrelevant to the control in the power signal is filtered out by the signal filtering unit, and the power signal is a signal transmitted between the power domain controller or the backup power domain controller and the power domain component.

[0061] Optionally, the power domain components include a power battery control unit, a generator control unit, and an engine control unit.

[0062] Based on the same inventive concept, an embodiment of the present application provides a vehicle, including a power domain communication system described in the second aspect of the present application.

[0063] As for the method embodiment, since it is basically similar to the system embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0064] It should be noted that for the method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the order of the actions described, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the embodiments of the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the embodiments of the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0067] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0068] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0069] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0070] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0071] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0072] The above is a detailed introduction to a power domain communication system, method and vehicle provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A power domain communication system, characterized in that: The system includes: a power domain controller, a backup power domain controller, and a power domain component; the power domain component is communicatively connected to the power domain controller via a primary network segment, and is communicatively connected to the power domain controller via a backup network segment; the power domain component is communicatively connected to the backup power domain controller via a backup network segment; the power domain controller is communicatively connected to the backup power domain controller via a backup network segment; When the main network segment is in a communication failure state, the power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; The backup power domain controller transmits signals with the power domain components via the backup network segment to perform power-related functions when the power domain controller is in a faulty state; The power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the main network segment, and performs power-related functions after correcting the signal transmitted by the backup network segment based on the check result.

2. A power domain communication system according to claim 1, characterized in that: The system further comprises: The network segment allocation unit is used to select a target network segment as a backup network segment from a dedicated network segment and a shared network segment according to communication interface resources, wherein the shared network segment is a network segment shared with other controllers.

3. The power domain communication system according to claim 1, characterized in that: In the case where the vehicle includes two drive motors, the first drive motor control unit is communicatively connected to the power domain controller via the primary network segment and is communicatively connected to the power domain controller via the backup network segment; the first drive motor control unit is communicatively connected to the backup power domain controller via the backup network segment; The second drive motor control unit is communicatively connected to the power domain controller via the first network segment; The power domain controller transmits signals with the second drive motor control unit through the first network segment to perform power-related functions.

4. A power domain communication system according to claim 2, characterized in that: The system further includes: an intelligent driving control unit, the intelligent driving control unit being communicatively connected to the backup power domain controller, and being communicatively connected to the power domain controller: The intelligent driving control unit determines a virtual accelerator pedal signal corresponding to a driving scenario of the vehicle when the backup power domain controller and the backup network segment are enabled; The backup power domain controller transmits a virtual accelerator pedal signal through the backup network segment to control the driving torque of the vehicle.

5. A power domain communication system according to claim 2, characterized in that: A signal receiving component, configured to simultaneously receive signals on the primary network segment and the backup network segment and, based on the signal on the primary network segment, execute power-related functions. The signal receiving component includes a power domain controller, a backup power domain controller, and a power domain component. The power domain component is used to execute power-related functions based on the signal currently transmitted by the backup network segment when the status change signal transmitted through the main network segment is completed.

6. A power domain communication system according to claim 2, characterized in that: The system further includes a load ratio determination unit and a transmission strategy determination unit; The load rate determining unit is configured to determine the load rate of the enabled standby network segment when the standby network segment is a shared network segment; The transmission strategy determining unit is configured to determine a signal transmission strategy corresponding to the load rate according to the load rate; The power domain controller is configured to perform signal transmission with the power domain components by using the enabled standby network segment and adopting the signal transmission strategy to execute power-related functions; The backup power domain controller is used to perform signal transmission with the power domain components by adopting the signal transmission strategy through the enabled backup network segment in the event of a power domain controller failure, so as to perform power-related functions.

7. A power domain communication system according to claim 6, characterized in that: The system further comprises: A load ratio comparison unit, configured to compare the load ratio after adopting the signal transmission strategy with a target threshold value to obtain a comparison result; A signal filtering unit is used to filter out power support signals that are not related to control in the power signal when the comparison result shows that the load rate is greater than or equal to the target threshold. The power signal is a signal transmitted between the power domain controller or the backup power domain controller and the power domain component.

8. The power domain communication system according to claim 1, characterized in that: The power domain components include a power battery control unit, a generator control unit, and an engine control unit.

9. The power domain communication system according to claim 1, characterized in that: The system further includes other controllers, which are communicatively connected to the power domain controller via a main network segment; The other controller is used to control the vehicle in collaboration with the power domain controller through the main network segment.

10. The power domain communication system according to claim 3, characterized in that: The system further comprises a DC converter and an AC-DC converter, wherein the DC converter and the AC-DC converter are communicatively connected to the power domain controller via a first network segment; The DC converter is configured to execute a corresponding control action according to the control signal received from the power domain controller; The AC-DC converter is used to perform corresponding control actions according to the control signal received from the power domain controller.

11. A power domain communication method, characterized in that: Applied to a power domain communication system according to any one of claims 1 to 10, the method comprising: Determine the communication status of the main network segment and the working status of the power domain controller; According to the communication failure status of the main network segment and the normal status of the power domain controller, the power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; According to the fault status of the power domain controller, the backup power domain controller transmits signals with the power domain components through the backup network segment to perform power-related functions; When the backup network segment is enabled, the power domain component performs a rationality check on the signal transmitted by the backup network segment based on the historical signal transmitted by the primary network segment; Based on the inspection result, the signal transmitted by the backup network segment is corrected by the power domain component, and the power-related function is executed based on the corrected signal.

12. A vehicle, characterized in that: A power domain communication system comprising any one of claims 1 to 10.

Images