Vehicle redundant power grid method and apparatus therefor

Abstract

The application relates to a vehicle redundancy power grid method and device thereof, comprising: performing fault diagnosis on a vehicle power grid; when there is at least one fault in the vehicle power grid, obtaining a fault type of the at least one fault; obtaining a severity and a monitorability corresponding to the at least one fault according to the fault type of the at least one fault and a preset mapping relationship; wherein the preset mapping relationship is a mapping relationship between the fault type and the severity and a mapping relationship between the fault type and the monitorability; obtaining a current use mode; and determining a redundancy power grid health degree according to the current use mode and the severity and the monitorability corresponding to the at least one fault. Through the application, the technical problem that the vehicle power grid redundancy design brings about power supply fault diagnosis diversification and complication and safety risks can be solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle redundant power grid diagnostics, and specifically to a method and apparatus for vehicle redundant power grid. Background Technology

[0002] With the application of autonomous driving technology in vehicles, human intervention is minimal in high-level autonomous driving scenarios. All perception, calculation, decision-making, and control are completed automatically by the device. In the complex device workflow, even a small malfunction that causes some devices to become unusable can lead to serious consequences such as vehicle crashes and loss of life. Therefore, redundancy design is essential.

[0003] Compared to traditional vehicle power grid architectures, to meet the higher functional safety requirements of most intelligent driving-related modules and to accommodate redundant design for autonomous driving, the power grid architecture adapted to L3 and higher levels needs to have redundant power supply nodes. This requires diagnosing and controlling the switching of power supply channels during faults and reporting vehicle power grid fault information to eliminate single points of failure in traditional vehicle power supply systems. However, redundant design of the vehicle power grid leads to more diverse and complex power fault diagnosis, posing safety risks. Summary of the Invention

[0004] The purpose of this invention is to propose a vehicle redundant power grid method and apparatus to solve the technical problems that the redundancy design of the vehicle power grid leads to the diversification and complexity of power fault diagnosis and the existence of safety risks.

[0005] To achieve the above objectives, embodiments of this application provide a vehicle redundant power grid method, the method comprising:

[0006] Perform fault diagnosis on the vehicle's electrical system;

[0007] When there is at least one fault in the vehicle's electrical grid, obtain the fault type of the at least one fault;

[0008] The severity and monitorability of the at least one fault are obtained based on the fault type of the at least one fault and a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between fault type and severity and the mapping relationship between fault type and monitorability;

[0009] Obtain the current usage mode; wherein, the current usage mode includes the scenario mode when the user is preparing to use the vehicle or preparing to leave the vehicle, the scenario mode when the user is resting or entertaining in the vehicle, the scenario mode when the user is driving the vehicle and remote parking is activated;

[0010] The health of the redundant power grid is determined based on the current usage pattern and the severity and monitorability of the at least one fault.

[0011] Optionally, determining the health of the redundant power grid based on the current usage mode and the severity and monitorability of the at least one fault includes:

[0012] When at least two faults exist, the fault with the highest severity is determined, and the redundancy grid health is determined based on the current usage mode and the severity and monitorability corresponding to the fault with the highest severity.

[0013] Optionally, determining the health of the redundant power grid based on the current usage mode and the severity and monitorability of the at least one fault includes:

[0014] Calculate the sum of severity and monitorability corresponding to the fault with the highest severity.

[0015] Obtain the coefficient corresponding to the current usage mode;

[0016] The sum of the severity and the monitorability is multiplied by the coefficient to obtain the health value. The health of the redundant power grid is determined based on the comparison results of the health value with multiple preset value ranges. The multiple preset value ranges correspond to different redundant power grid health values.

[0017] Optionally, the fault diagnosis of the vehicle's electrical network includes:

[0018] Perform fault diagnosis on DC / DC equipment, main battery, auxiliary battery, smart electrical box, and domain controller;

[0019] The smart appliance box is electrically connected to the DC / DC device, the main battery, the auxiliary battery, and the domain controller. The domain controller is electrically connected to the load, which includes conventional loads and redundant loads. The DC / DC device, the smart appliance box, and the domain controller are all communicatively connected to the smart power distribution module.

[0020] Optionally, the steps for fault diagnosis of DC / DC equipment include:

[0021] If the intelligent power distribution module receives communication messages sent by the DC / DC device for a preset duration, it determines that the DC / DC device is communicating normally; if the intelligent power distribution module detects that the communication messages sent by the DC / DC device are lost or timed out, it determines that the DC / DC device is communicating faulty.

[0022] If the intelligent power distribution module receives a DC / DC status signal from the DC / DC device that is a failure value for a preset duration, then the DC / DC device is determined to be faulty; if the intelligent power distribution module receives a DC / DC status signal from the DC / DC device that is not a failure value for a preset duration, then the DC / DC device is determined to be powered normally.

[0023] The intelligent power distribution module receives the DC / DC voltage value sent by the DC / DC device and determines the state of the DC / DC device's output voltage based on the DC / DC voltage value and a preset DC / DC device voltage state diagram; the state of the DC / DC device's output voltage includes normal, undervoltage, overvoltage, over-voltage, and over-voltage.

[0024] Optionally, the steps for fault diagnosis of the main battery include:

[0025] The intelligent power distribution module receives the main battery connection identifier sent by the domain controller. When the main battery disconnection identifier is "no disconnection", it determines that the main battery connection is normal. When the main battery disconnection identifier is "disconnection", it determines that the main battery has experienced a disconnection fault.

[0026] The intelligent power distribution module receives the main battery voltage value sent by the domain controller. When the main battery voltage value is greater than or equal to a preset voltage threshold, it determines that the main battery output voltage is normal; when the main battery voltage value is less than the preset voltage threshold, it determines that the main battery output voltage is undervoltage fault.

[0027] Optionally, the steps for fault diagnosis of the auxiliary battery include:

[0028] The intelligent power distribution module receives the secondary battery connection identifier sent by the domain controller. When the secondary battery disconnection identifier is "no disconnection", it determines that the secondary battery connection is normal. When the secondary battery disconnection identifier is "disconnection", it determines that the secondary battery has experienced a disconnection fault.

[0029] The intelligent power distribution module receives the secondary battery voltage value sent by the domain controller. When the secondary battery voltage value is greater than or equal to a preset voltage threshold, it determines that the secondary battery output voltage is normal; when the secondary battery voltage value is less than the preset voltage threshold, it determines that the secondary battery output voltage is undervoltage fault.

[0030] Optionally, the steps for troubleshooting the smart appliance box include:

[0031] If the intelligent power distribution module receives communication messages from the intelligent appliance box for a preset duration, it determines that the intelligent appliance box is communicating normally; if the intelligent power distribution module detects that the communication messages from the intelligent appliance box are lost or timed out, it determines that the intelligent appliance box is communicating faulty.

[0032] If the intelligent power distribution module receives a DC / DC power signal from the intelligent appliance box that is disconnected for a preset duration, it determines that there is an open circuit fault between the intelligent appliance box and the DC / DC device; if it receives a DC / DC power signal from the intelligent appliance box that is normal for a preset duration, it determines that the connection between the intelligent appliance box and the DC / DC device is normal.

[0033] If the intelligent power distribution module receives a disconnected main battery power signal from the intelligent electrical box after a preset duration, it determines that the connection between the intelligent electrical box and the main battery is open; if it receives a normal main battery power signal from the intelligent electrical box after a preset duration, it determines that the connection between the intelligent electrical box and the main battery is normal.

[0034] If the intelligent power distribution module receives a disconnected auxiliary battery power signal from the intelligent electrical box for a preset duration, it determines that there is an open circuit fault between the intelligent electrical box and the auxiliary battery; if it receives a normal auxiliary battery power signal from the intelligent electrical box for a preset duration, it determines that the connection between the intelligent electrical box and the auxiliary battery is normal.

[0035] Optionally, the steps for troubleshooting the domain controller include:

[0036] If the intelligent power distribution module receives communication messages from the domain controller for a preset duration, it determines that the domain controller is communicating normally; if the intelligent power distribution module detects that the domain controller's communication messages are lost or timed out, it determines that the domain controller is communicating faulty.

[0037] If the intelligent power distribution module receives a disconnected domain controller power signal from the intelligent appliance box for a preset duration, it determines that there is an open circuit fault in the connection between the domain controller and the intelligent appliance box; if the intelligent power distribution module receives a normal domain controller power signal from the intelligent appliance box for a preset duration, it determines that the connection between the domain controller and the intelligent appliance box is normal.

[0038] When the intelligent power distribution module receives a power signal from the intelligent electrical box indicating a short circuit to ground from the domain controller after a preset time, it determines that the main power supply of the domain controller is short-circuited to ground.

[0039] When the intelligent power distribution module receives an overload signal from the intelligent appliance box after a preset time, it determines that the main power supply of the domain controller is overloaded.

[0040] This application embodiment also provides a vehicle redundant power grid device, which can be used in the vehicle redundant power grid method described above;

[0041] The device includes:

[0042] The fault diagnosis module is used to diagnose faults in the vehicle's electrical system.

[0043] The fault type determination module is used to obtain the fault type of the at least one fault when there is at least one fault in the vehicle's electrical grid;

[0044] The query module is used to obtain the severity and monitorability of the at least one fault based on the fault type and a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between fault type and severity and the mapping relationship between fault type and monitorability.

[0045] The mode determination module is used to obtain the current usage mode; wherein, the current usage mode includes the scenario mode when the user is preparing to use the vehicle or preparing to leave the vehicle, the scenario mode when the user is resting or entertaining in the vehicle, the scenario mode when the user is driving the vehicle and remote parking is activated.

[0046] The health determination module is used to determine the health of the redundant power grid based on the current usage mode and the severity and monitorability of the at least one fault.

[0047] This application provides a vehicle redundant power grid method and apparatus, which can perform real-time fault diagnosis on various functional devices of the vehicle redundant power grid. When at least one fault occurs in the vehicle redundant power grid, the severity and monitorability of the at least one fault are obtained, and the health of the redundant power grid is determined according to the current usage mode of the vehicle and the severity and monitorability of the at least one fault. The health of the redundant power grid can be broadcast to various nodes (e.g., the intelligent driving domain controller) through the vehicle's CAN bus. The logic design of the intelligent driving domain controller only needs to obtain the health of the redundant power grid and perform corresponding control based on the health of the redundant power grid, such as shutting down entertainment loads, which is beneficial to driving safety, makes the function simpler, and ensures the driving safety of autonomous driving. With the design of the vehicle's low-voltage redundant power grid, power supply faults are becoming more diverse and complex. This application proposes a vehicle power grid health concept and calculation, which is beneficial for problem troubleshooting. In summary, the method and apparatus of this application can solve the technical problems of diversified and complex power supply fault diagnosis and safety risks brought about by the redundant design of the vehicle power grid.

[0048] Other features and advantages of the embodiments of this application will be set forth in the following description. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a flowchart of a vehicle redundant power grid method according to one embodiment of the present invention.

[0051] Figure 2 This is a schematic diagram of a vehicle redundant power grid architecture according to one embodiment of the present invention.

[0052] Figure 3 This is a voltage state diagram of a DC / DC device in one embodiment of the present invention.

[0053] Figure 4 This is a schematic diagram of a vehicle redundant power grid device according to one embodiment of the present invention. Detailed Implementation

[0054] The detailed description of the accompanying drawings is intended to illustrate the presently preferred embodiments of the invention and is not intended to represent only the forms in which the invention can be implemented. It should be understood that the same or equivalent functions can be accomplished by different embodiments intended to be included within the spirit and scope of the invention.

[0055] See Figure 1 An embodiment of the present invention provides a vehicle redundant power grid method, comprising the following steps:

[0056] Step S1: Perform fault diagnosis on the vehicle's electrical grid.

[0057] Step S2: When there is at least one fault in the vehicle's electrical grid, obtain the fault type of the at least one fault.

[0058] Specifically, the fault types are shown in Table 1 below;

[0059] Step S3: Obtain the severity and monitorability of the at least one fault according to the fault type and the preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between fault type and severity and the mapping relationship between fault type and monitorability.

[0060] Specifically, the preset mapping relationship is shown in Table 1 below;

[0061] Table 1 - Mapping Relationship Table

[0062]

[0063]

[0064] As shown in Table 1 above, this embodiment sets four severity levels, namely S0, S1, S2 and S3, where the severity of S0, S1, S2 and S3 increases sequentially, with S0 being the lowest severity and S3 being the highest severity; and sets three monitorability levels, namely M1, M2 and M3, where the monitorability of M1, M2 and M3 increases sequentially, with M1 being the lowest monitorability and M3 being the highest monitorability.

[0065] Step S4: Obtain the current usage mode; wherein, the current usage mode includes the scenario mode when the user is preparing to use the vehicle or is preparing to leave the vehicle, the scenario mode when the user is resting or entertaining in the vehicle, the scenario mode when the user is driving the vehicle and remote parking is activated.

[0066] Step S5: Determine the health of the redundant power grid based on the current usage mode and the severity and monitorability of the at least one fault.

[0067] This embodiment's method can perform real-time fault diagnosis on various functional devices of the vehicle's redundant power grid. When at least one fault occurs in the vehicle's redundant power grid, the severity and monitorability of the at least one fault are obtained. Based on the vehicle's current usage mode and the severity and monitorability of the at least one fault, the health of the redundant power grid is determined. The health of the redundant power grid can be broadcast to various nodes (e.g., the intelligent driving domain controller) via the vehicle's CAN bus. The logic design of the intelligent driving domain controller only needs to obtain the health of the redundant power grid and perform corresponding control based on the health of the redundant power grid. For example, when the health of the redundant power grid is poor, entertainment loads can be shut down, which is beneficial to driving safety, simplifies the function, and ensures the driving safety of autonomous driving. With the design of the vehicle's low-voltage redundant power grid, power supply faults are becoming more diverse and complex. This embodiment proposes a vehicle power grid health concept and calculation, which is beneficial for problem troubleshooting. In summary, this embodiment's method can solve the technical problem that the redundant design of the vehicle power grid leads to the diversification and complexity of power supply fault diagnosis and the existence of safety risks.

[0068] In some embodiments, step S5 specifically includes:

[0069] Step S51: When at least two faults exist, determine the fault with the highest severity.

[0070] Specifically, for example, if there is a main battery disconnection fault and a DC / DC device communication fault, according to Table 1, the severity of the main battery disconnection fault is S3 and the severity of the DC / DC device communication fault is S0. Therefore, the main battery disconnection fault is selected. According to the main battery disconnection fault and Table 1, the severity is S3 and the monitorability is M3.

[0071] Step S52: Determine the health of the redundant power grid based on the current usage mode and the severity and monitorability of the fault with the highest severity.

[0072] Specifically, as in the example above, based on the main battery disconnection fault and the severity of the fault as S3 and the monitorability as M3 obtained from Table 1, the health of the redundant power grid is determined according to the current usage mode, S3, and M3.

[0073] In some embodiments, step S52 specifically includes:

[0074] Step S521: Calculate the sum of severity and monitorability corresponding to the fault with the highest severity.

[0075] Specifically, as in the example above, the redundancy grid health is determined based on the current usage mode and S3 and M3, and S3+M3 is calculated.

[0076] For example, the specific parameter values ​​and descriptions of severity are shown in Table 2 below;

[0077] Table 2 - Severity Parameters

[0078] S0 Low fault rate of power grid 0.9 S1 Medium faults in power grid 0.6 S2 Severe power grid failure 0.4 S3 Major power grid failure 0.1

[0079] For example, the specific parameter values ​​and descriptions of the monitorability are shown in Table 3 below;

[0080] Table 3 - Monitorability Parameters

[0081] M0 Full-scene visibility 1 M1 Most scenes are visible 0.7 M2 Some scenes are visible 0.5 M3 A small portion of the scene is visible. 0.3

[0082] Step S522: Obtain the coefficient corresponding to the current usage mode;

[0083] For example, the coefficients for usage patterns are shown in Table 4 below;

[0084] Table 4 - Usage Pattern Coefficient

[0085] standby Scenarios where the user is preparing to use the vehicle or is preparing to leave the vehicle. 1 comfort Scenarios where users rest or enjoy entertainment inside the car. 0.8 DRV In scenarios where users are driving the vehicle and remote parking is activated. 0.5

[0086] Step S523: Multiply the sum of the severity and the monitorability by the coefficient to obtain the health value, and determine the redundant power grid health based on the comparison results of the health value with multiple preset value ranges; wherein, the multiple preset value ranges correspond to different redundant power grid health.

[0087] Specifically, if the usage mode is U and the health value is HL, as in the example above, then: HL = (S3 + M3) * U.

[0088] For example, the health of the redundant power grid is divided into low, medium, high, and relatively high, with each of these four levels corresponding to a different preset value range. The health of the redundant power grid is determined as low, medium, high, or relatively high based on the preset value range into which the health value HL falls.

[0089] Furthermore, the power grid health corresponding to different usage modes is shown in Tables 5-7 below;

[0090] Table 5 - Stanby Mode Health

[0091]

[0092]

[0093] Table 6 - Comfort Mode Health

[0094]

[0095] Table 7 - DRV Mode Health

[0096]

[0097]

[0098] In some embodiments, step S1 specifically includes:

[0099] Perform fault diagnosis on DC / DC equipment, main battery, auxiliary battery, smart electrical box, and domain controller; specifically, the fault types can be found in Table 1.

[0100] Among them, such as Figure 2 The diagram shows the vehicle redundant power grid architecture in this embodiment. Figure 2 In the context, the smart appliance box ( Figure 2 The CCU (Central Control Unit) is respectively connected to the DC / DC device ( Figure 2 (DC-CDC), main storage battery ( Figure 2 EBS1), auxiliary battery ( Figure 2 EBS2), Domain Controller ( Figure 2 The domain controller (ZCU) is electrically connected to the load, which includes conventional loads and redundant loads. Figure 2 The diagram shows multiple conventional and redundant loads. The DC / DC device, smart appliance box, and domain controller are all communicatively connected to the smart power distribution module. Figure 2 The dashed line (can be connected via CANFD bus) indicates that the main and auxiliary batteries are grounded, and are connected to the domain controller via a LIN bus. Figure 2 (middle dashed line).

[0101] In some embodiments, step S1, the step of fault diagnosis of the DC / DC device, includes:

[0102] Step S111: If the intelligent power distribution module continuously receives communication messages sent by the DC / DC device for a preset duration, it is determined that the DC / DC device is communicating normally; if the intelligent power distribution module detects that the communication messages sent by the DC / DC device are lost or timed out, it is determined that the DC / DC device is communicating faulty; specifically, the communication messages of the DC / DC device are periodic messages sent according to a preset periodic time.

[0103] Step S112: If the intelligent power distribution module receives a DC / DC status signal from the DC / DC device that is a failure value (e.g., IPS_DCDCModeSt = Failure) for a preset duration, then the power supply of the DC / DC device is determined to be faulty; if the intelligent power distribution module receives a DC / DC status signal from the DC / DC device that is not a failure value (e.g., IPS_DCDCModeSt ≠ Failure) for a preset duration, then the power supply of the DC / DC device is determined to be normal.

[0104] Step S113: The intelligent power distribution module receives the DC / DC voltage value sent by the DC / DC device, and determines the state of the DC / DC device output voltage according to the DC / DC voltage value and the preset DC / DC device voltage state diagram; the state of the DC / DC device output voltage includes normal, undervoltage, overvoltage, overvoltage, and overvoltage.

[0105] Specifically, in this embodiment, the voltage state diagram of the DC / DC device is as follows: Figure 3 As shown, see reference Figure 3 When a received DC / DC voltage value is between 11.0V and 16.0V, the output voltage is considered normal. If a received DC / DC voltage value is between 8.5V and 11.5V for 10 consecutive seconds, the output voltage is considered undervoltage. If a received DC / DC voltage value is less than 9.0V for 10 consecutive seconds, the output voltage is considered overvoltage or undervoltage. If a received DC / DC voltage value is between 15.5V and 17.0V for 3 consecutive seconds, the output voltage is considered overvoltage. If a received DC / DC voltage value is greater than 16.5V for 2 consecutive seconds, the output voltage is considered overvoltage. When the voltage value is within the hysteresis range, the voltage state defaults to the previous state.

[0106] In some embodiments, step S1, the step of fault diagnosis of the main battery, includes:

[0107] In step S121, the intelligent power distribution module receives the main battery connection identifier sent by the domain controller. When the main battery disconnection identifier is "no disconnection" (e.g., EBSF_BattDisconnectionFlag = no batterydisconnection), the main battery connection is determined to be normal. When the main battery disconnection identifier is "disconnection" (e.g., EBSF_BattDisconnectionFlag = battery disconnection), the main battery disconnection fault is determined to have occurred.

[0108] In step S122, the intelligent power distribution module receives the main battery voltage value sent by the domain controller. When the main battery voltage value is greater than or equal to a preset voltage threshold, it is determined that the main battery output voltage is normal; when the main battery voltage value is less than the preset voltage threshold, it is determined that the main battery output voltage is undervoltage fault. Specifically, the preset voltage threshold is, for example, 8V.

[0109] In some embodiments, step S1, the step of fault diagnosis of the auxiliary battery, includes:

[0110] Step S131: The intelligent power distribution module receives the secondary battery connection identifier sent by the domain controller. When the secondary battery disconnection identifier is "no disconnection" (e.g., EBST_BattDisconnectionFlag = no batterydisconnection), the secondary battery connection is determined to be normal. When the secondary battery disconnection identifier is "disconnection" (e.g., ...), the connection is determined to be normal.

[0111] When EBST_BattDisconnectionFlag = battery disconnection, it is determined that the auxiliary battery has experienced a disconnection fault.

[0112] In step S132, the intelligent power distribution module receives the secondary battery voltage value sent by the domain controller. When the secondary battery voltage value is greater than or equal to a preset voltage threshold, it is determined that the secondary battery output voltage is normal; when the secondary battery voltage value is less than the preset voltage threshold, it is determined that the secondary battery output voltage is undervoltage fault. Specifically, the preset voltage threshold is, for example, 8V.

[0113] In some embodiments, step S1, the step of fault diagnosis of the smart appliance box, includes:

[0114] Step S141: If the intelligent power distribution module continuously receives communication messages from the intelligent electrical box for a preset duration, it is determined that the communication of the intelligent electrical box is normal; if the intelligent power distribution module detects that the communication messages of the intelligent electrical box are lost or timed out, it is determined that the communication of the intelligent electrical box is faulty; specifically, the communication messages of the intelligent electrical box are periodic messages sent according to a preset periodic time.

[0115] In step S142, when the intelligent power distribution module receives a DC / DC power signal from the intelligent appliance box that is disconnected (e.g., IPDS_DCDCPowerFaultSt=Open) for a preset duration, it determines that the connection between the intelligent appliance box and the DC / DC device is open-circuit fault; when it receives a DC / DC power signal from the intelligent appliance box that is normal (e.g., IPS_DCDCPowerFaultSt=Normal) for a preset duration, it determines that the connection between the intelligent appliance box and the DC / DC device is normal.

[0116] Step S143: When the intelligent power distribution module receives a main battery power signal from the intelligent electrical box indicating disconnection (e.g., IPDS_BAT1 PowerFaultSt = Open) for a preset duration, it determines that there is an open circuit fault between the intelligent electrical box and the main battery; when it receives a main battery power signal from the intelligent electrical box indicating normal operation for a preset duration (e.g., ...

[0117] When IPDS_BAT1PowerFaultS=Normal), it is determined that the smart appliance box is connected to the main battery normally; specifically, the preset duration is, for example, 100 milliseconds.

[0118] In step S144, when the intelligent power distribution module receives a power signal from the intelligent electrical box indicating that the auxiliary battery power is disconnected (e.g., IPDS_BAT2PowerFaultSt=Open) for a preset duration, it determines that there is an open circuit fault between the intelligent electrical box and the auxiliary battery; when it receives a power signal from the intelligent electrical box indicating that the auxiliary battery power is normal (IPDS_BAT2PowerFaultSt=Normal) for a preset duration, it determines that the connection between the intelligent electrical box and the auxiliary battery is normal; specifically, the preset duration is, for example, 100 milliseconds.

[0119] In some embodiments, step S1, the step of fault diagnosis of the domain controller, includes:

[0120] Step S151: If the intelligent power distribution module receives communication messages from the domain controller for a preset duration, it determines that the domain controller is communicating normally; if the intelligent power distribution module detects that the domain controller's communication messages are lost or timed out, it determines that the domain controller is communicating faulty; specifically, the domain controller's communication messages are periodic messages sent according to a preset periodic time.

[0121] In step S152, when the intelligent power distribution module receives a domain controller power signal from the intelligent appliance box indicating that the connection between the domain controller and the intelligent appliance box is open (e.g., IPDS_ZCUPowerFaultSt=Open) after a preset duration, it determines that the connection between the domain controller and the intelligent appliance box is open. When the intelligent power distribution module receives a domain controller power signal from the intelligent appliance box indicating that the connection between the domain controller and the intelligent appliance box is normal (e.g., IPS_ZCUPowerFaultSt=Normal) after a preset duration, it determines that the connection between the domain controller and the intelligent appliance box is normal. Specifically, the preset duration is, for example, 100 milliseconds.

[0122] Step S153: When the intelligent power distribution module receives a domain controller power signal from the intelligent appliance box indicating a short circuit to ground (e.g., IPDS_ZCUPowerFaultSt = Circuit short to ground) after a continuously preset duration, it determines that the domain controller main power supply has a short circuit to ground fault; specifically, the continuously preset duration is, for example, 100 milliseconds.

[0123] Step S154: When the intelligent power distribution module receives a domain controller power signal from the intelligent appliance box indicating an overload (e.g., IPDS_ZCUPowerFaultSt = Overload) after a continuously preset duration, it determines that the domain controller main power supply is overloaded; specifically, the continuously preset duration is, for example, 100 milliseconds.

[0124] In some embodiments, the intelligent power distribution module calculates the redundant grid health using the mode coefficient through logic and broadcasts the vehicle grid health via the CAN bus / CANFD bus. When the intelligent driving domain controller ADC receives the current redundant grid health as high, medium, or low, it restricts the activation of the autonomous driving function.

[0125] In some embodiments, the intelligent power distribution module calculates the redundant power grid health using the mode coefficient through logic and broadcasts the vehicle power grid health via the CAN bus / CANFD bus. When the intelligent driving domain controller ADC receives the current redundant power grid health as medium or low, it sends a command to the domain controller to shut down the power supply of certain entertainment loads to ensure that the redundant loads are powered normally and the vehicle can be parked safely.

[0126] Corresponding to the vehicle redundant power grid method of the above embodiments, another embodiment of the present invention provides a vehicle redundant power grid diagnostic device, see below. Figure 4 The apparatus in this embodiment includes:

[0127] Fault diagnosis module 1 is used to diagnose faults in the vehicle's electrical system;

[0128] Fault type determination module 2 is used to obtain the fault type of the at least one fault when there is at least one fault in the vehicle's electrical grid;

[0129] The query module 3 is used to obtain the severity and monitorability of the at least one fault based on the fault type of the at least one fault and a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between fault type and severity and the mapping relationship between fault type and monitorability;

[0130] The mode determination module 4 is used to obtain the current usage mode; wherein, the current usage mode includes the scenario mode when the user is preparing to use the vehicle or preparing to leave the vehicle, the scenario mode when the user is resting or entertaining in the vehicle, the scenario mode when the user is driving the vehicle and remote parking is activated.

[0131] The health determination module 5 is used to determine the health of the redundant power grid based on the current usage mode and the severity and monitorability of the at least one fault.

[0132] The vehicle redundancy power grid diagnostic device described above is merely illustrative. The modules described as separate components may or may not be physically separate. The components of a module may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the vehicle redundancy power grid diagnostic device solution in the embodiments.

[0133] It should be noted that the vehicle redundant power grid diagnostic device of the above embodiments corresponds to the vehicle redundant power grid method of the above embodiments. Therefore, the parts of the vehicle redundant power grid diagnostic device of the above embodiments that are not described in detail can be obtained by referring to the content of the vehicle redundant power grid method of the above embodiments. That is, the specific steps recorded in the vehicle redundant power grid method of the above embodiments can be understood as the functions that the vehicle redundant power grid diagnostic device of the above embodiments can achieve, and will not be repeated here.

[0134] Furthermore, if the vehicle redundant power grid diagnostic device of the above embodiments is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium.

[0135] Another embodiment of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the vehicle redundant power grid method as described in the above embodiments.

[0136] Specifically, the computer-readable storage medium may include any entity or recording medium capable of carrying the computer program instructions, such as a USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media.

[0137] Another embodiment of the present invention provides an electronic device including a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle redundant power grid method described in the above embodiments.

[0138] The electronic device may also include a bus connecting different components, including memory and processor. The memory may include a computer-readable medium in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The memory may also include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of this application. The electronic device may also communicate with one or more external devices (e.g., keyboard, pointing device, display, etc.), and with one or more devices that enable a user to interact with the electronic device, and / or with any device (e.g., a network interface card) that enables the electronic device to communicate with one or more other computing devices, such communication may be performed via an input / output (I / O) interface, and the electronic device may also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via a network adapter.

[0139] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for diagnosing redundant power grids in vehicles, characterized in that, The method includes: Perform fault diagnosis on the vehicle's electrical system; When there is at least one fault in the vehicle's electrical grid, obtain the fault type of the at least one fault; The severity and monitorability of the at least one fault are obtained based on the fault type of the at least one fault and a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between fault type and severity and the mapping relationship between fault type and monitorability; Obtain the current usage mode; wherein, the current usage mode includes the scenario mode when the user is preparing to use the vehicle or preparing to leave the vehicle, the scenario mode when the user is resting or entertaining in the vehicle, the scenario mode when the user is driving the vehicle and remote parking is activated; The health of the redundant power grid is determined based on the current usage pattern and the severity and monitorability of the at least one fault. The determination of the health status of the redundant power grid includes: Calculate the sum of severity and monitorability for the fault with the highest severity among the at least one faults; Obtain the coefficient corresponding to the current usage mode; The sum of the severity and the monitorability is multiplied by the coefficient to obtain the health value. The health of the redundant power grid is determined based on the comparison results of the health value with multiple preset value ranges. The multiple preset value ranges correspond to different redundant power grid health values.

2. The vehicle redundant power grid diagnostic method according to claim 1, characterized in that, The fault diagnosis of the vehicle's electrical network includes: Perform fault diagnosis on DC / DC equipment, main battery, auxiliary battery, smart electrical box, and domain controller; The smart appliance box is electrically connected to the DC / DC device, the main battery, the auxiliary battery, and the domain controller. The domain controller is electrically connected to the load, which includes conventional loads and redundant loads. The DC / DC device, the smart appliance box, and the domain controller are all communicatively connected to the smart power distribution module.

3. The vehicle redundant power grid diagnostic method according to claim 2, characterized in that, The steps for troubleshooting DC / DC equipment include: If the intelligent power distribution module receives communication messages sent by the DC / DC device for a preset duration, it determines that the DC / DC device is communicating normally; if the intelligent power distribution module detects that the communication messages sent by the DC / DC device are lost or timed out, it determines that the DC / DC device is communicating faulty. If the intelligent power distribution module receives a DC / DC status signal from the DC / DC device that is a failure value for a preset duration, then the DC / DC device is determined to be faulty; if the intelligent power distribution module receives a DC / DC status signal from the DC / DC device that is not a failure value for a preset duration, then the DC / DC device is determined to be powered normally. The intelligent power distribution module receives the DC / DC voltage value sent by the DC / DC device and determines the state of the DC / DC device's output voltage based on the DC / DC voltage value and a preset DC / DC device voltage state diagram; the state of the DC / DC device's output voltage includes normal, undervoltage, overvoltage, over-voltage, and over-voltage.

4. The vehicle redundant power grid diagnostic method according to claim 2, characterized in that, The steps for diagnosing faults in the main battery include: The intelligent power distribution module receives the main battery connection identifier sent by the domain controller. When the main battery disconnection identifier is "no disconnection", it determines that the main battery connection is normal. When the main battery disconnection identifier is "disconnection", it determines that the main battery has experienced a disconnection fault. The intelligent power distribution module receives the main battery voltage value sent by the domain controller. When the main battery voltage value is greater than or equal to a preset voltage threshold, it determines that the main battery output voltage is normal; when the main battery voltage value is less than the preset voltage threshold, it determines that the main battery output voltage is undervoltage fault.

5. The vehicle redundant power grid diagnostic method according to claim 2, characterized in that, The steps for diagnosing faults in a secondary battery include: The intelligent power distribution module receives the secondary battery connection identifier sent by the domain controller. When the secondary battery disconnection identifier is "no disconnection", it determines that the secondary battery connection is normal. When the secondary battery disconnection identifier is "disconnection", it determines that the secondary battery has experienced a disconnection fault. The intelligent power distribution module receives the secondary battery voltage value sent by the domain controller. When the secondary battery voltage value is greater than or equal to a preset voltage threshold, it determines that the secondary battery output voltage is normal; when the secondary battery voltage value is less than the preset voltage threshold, it determines that the secondary battery output voltage is undervoltage fault.

6. The vehicle redundant power grid diagnostic method according to claim 2, characterized in that, The steps for troubleshooting smart appliance boxes include: If the intelligent power distribution module receives communication messages from the intelligent appliance box for a preset duration, it determines that the intelligent appliance box is communicating normally; if the intelligent power distribution module detects that the communication messages from the intelligent appliance box are lost or timed out, it determines that the intelligent appliance box is communicating faulty. If the intelligent power distribution module receives a DC / DC power signal from the intelligent appliance box that is disconnected for a preset duration, it determines that there is an open circuit fault between the intelligent appliance box and the DC / DC device; if it receives a DC / DC power signal from the intelligent appliance box that is normal for a preset duration, it determines that the connection between the intelligent appliance box and the DC / DC device is normal. If the intelligent power distribution module receives a disconnected main battery power signal from the intelligent electrical box after a preset duration, it determines that there is an open circuit fault between the intelligent electrical box and the main battery; if it receives a normal main battery power signal from the intelligent electrical box after a preset duration, it determines that the connection between the intelligent electrical box and the main battery is normal. If the intelligent power distribution module receives a disconnected auxiliary battery power signal from the intelligent electrical box for a preset duration, it determines that there is an open circuit fault between the intelligent electrical box and the auxiliary battery; if it receives a normal auxiliary battery power signal from the intelligent electrical box for a preset duration, it determines that the connection between the intelligent electrical box and the auxiliary battery is normal.

7. The vehicle redundant power grid diagnostic method according to claim 2, characterized in that, The steps for troubleshooting a domain controller include: If the intelligent power distribution module receives communication messages from the domain controller for a preset duration, it determines that the domain controller is communicating normally; if the intelligent power distribution module detects that the domain controller's communication messages are lost or timed out, it determines that the domain controller is communicating faulty. If the intelligent power distribution module receives a disconnected domain controller power signal from the intelligent appliance box for a preset duration, it determines that there is an open circuit fault in the connection between the domain controller and the intelligent appliance box; if the intelligent power distribution module receives a normal domain controller power signal from the intelligent appliance box for a preset duration, it determines that the connection between the domain controller and the intelligent appliance box is normal. When the intelligent power distribution module receives a power signal from the intelligent electrical box indicating a short circuit to ground from the domain controller after a preset time, it determines that the main power supply of the domain controller is short-circuited to ground. When the intelligent power distribution module receives an overload signal from the intelligent appliance box after a preset time, it determines that the main power supply of the domain controller is overloaded.

8. A vehicle redundant power grid diagnostic device, characterized in that, The device is used to implement the vehicle redundant power grid diagnostic method according to any one of claims 1 to 7; The device includes: The fault diagnosis module is used to diagnose faults in the vehicle's electrical system. The fault type determination module is used to obtain the fault type of the at least one fault when there is at least one fault in the vehicle's electrical grid; The query module is used to obtain the severity and monitorability of the at least one fault based on the fault type of the at least one fault and a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between fault type and severity and the mapping relationship between fault type and monitorability; The mode determination module is used to obtain the current usage mode; wherein, the current usage mode includes the scenario mode when the user is preparing to use the vehicle or preparing to leave the vehicle, the scenario mode when the user is resting or entertaining in the vehicle, the scenario mode when the user is driving the vehicle and remote parking is activated. The health determination module is used to determine the health of the redundant power grid based on the current usage mode and the severity and monitorability of the at least one fault.

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