Fault monitoring processing method and system for controller backup power supply and storage medium

Abstract

The embodiment of the invention provides a fault monitoring and processing method and system for a controller backup power supply and a storage medium, and belongs to the technical field of safety of an electric driving system of an electric vehicle. The fault monitoring and processing method comprises the following steps: acquiring a bus voltage and a power supply voltage output by a backup power supply port; judging whether the bus voltage is greater than a preset first voltage threshold value or not; when it is judged that the bus voltage is larger than the first voltage threshold value, diagnosis of a backup power supply is started after a preset first time threshold value; and judging whether the backup power supply breaks down or not according to the power supply voltage and outputting a corresponding fault signal. The fault monitoring and processing method for the controller backup power supply can improve the robustness and effectiveness of monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle electric drive system safety, and in particular to a fault monitoring and processing method, system and storage medium for a controller backup power supply. Background Art

[0002] New energy vehicles are becoming an increasingly important member of the automotive industry and an indispensable tool for people to travel. As an important component of new energy vehicles, the electric drive system is mainly composed of a motor controller, a motor and a reducer. It is the key to converting electrical energy into driving force and carries important functions such as vehicle driving. Therefore, its reliability and safety are crucial to the electric drive system. In addition, with the release of the international functional safety standard ISO26262 and the national standard GB / T34590, people are paying more and more attention to the safety of the electric drive system.

[0003] As a low-voltage power supply for control power supply, its reliability is extremely important. In order to ensure that the system can continue to function normally when the low-voltage power supply is undervoltage or lost, adding a backup power supply is an effective means. Monitoring the power supply voltage of the backup power supply is the guarantee for the normal and stable operation of the controller system. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a method, system and storage medium for monitoring and processing the fault of a controller backup power supply. The method for monitoring and processing the fault of a controller backup power supply can improve the robustness and effectiveness of monitoring.

[0005] In order to achieve the above object, an embodiment of the present invention provides a fault monitoring and processing method for a controller backup power supply, comprising:

[0006] Obtain the bus voltage and the power voltage output by the backup power port;

[0007] Determining whether the bus voltage is greater than a preset first voltage threshold;

[0008] When it is determined that the bus voltage is greater than the first voltage threshold, starting diagnosis of the backup power supply after a preset first time threshold;

[0009] It is determined whether a backup power supply fails according to the power supply voltage and a corresponding fault signal is output.

[0010] Optionally, judging whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes:

[0011] Determining whether the power supply voltage comes from the first backup power supply port;

[0012] In the case where it is determined that the power supply voltage comes from the first backup power supply port, determining whether the power supply voltage is less than a preset first voltage lower limit threshold;

[0013] When it is determined that the power supply voltage is less than the first voltage lower limit threshold, determining that an undervoltage abnormality occurs in the backup power supply;

[0014] Obtaining a first abnormal number of undervoltage abnormalities of the backup power supply within a preset second time threshold;

[0015] Determine whether the first abnormal number is greater than a preset abnormal number threshold;

[0016] When it is determined that the first abnormal number is greater than the abnormal number threshold, a first backup power supply undervoltage fault is output.

[0017] Optionally, judging whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes:

[0018] Determine whether the power supply voltage is greater than a preset voltage recovery threshold within a preset third time threshold after the output of the first backup power supply undervoltage fault;

[0019] When it is determined that the power supply voltage is greater than the voltage recovery threshold within the third time threshold, it is determined that the undervoltage fault of the first backup power supply is recovered.

[0020] Optionally, judging whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes:

[0021] When it is determined that the power supply voltage is less than or equal to the voltage recovery threshold within the third time threshold, the backup power supply is turned off.

[0022] Optionally, judging whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes:

[0023] In the case where it is determined that the power supply voltage is greater than or equal to the first voltage lower limit threshold, determining whether the power supply voltage is greater than a preset first voltage upper limit threshold;

[0024] In the case where it is determined that the power supply voltage is greater than the first voltage upper limit threshold, determining that an overvoltage abnormality occurs in the backup power supply;

[0025] Obtaining a second abnormal number of times that the backup power supply has an overvoltage abnormality within the second time threshold;

[0026] Determine whether the second abnormal number is greater than the abnormal number threshold;

[0027] When it is determined that the second abnormal number is greater than the abnormal number threshold, outputting a first backup power supply overvoltage fault;

[0028] Turn off the backup power supply.

[0029] Optionally, judging whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal further includes:

[0030] In the case where it is determined that the power supply voltage does not come from the first backup power supply port, determining whether the power supply voltage comes from the second backup power supply port;

[0031] In the case where it is determined that the power supply voltage comes from the second backup power supply port, determining whether the power supply voltage is greater than a preset second voltage upper limit threshold or less than a preset second voltage lower limit threshold;

[0032] When it is determined that the power supply voltage is greater than the second voltage upper limit threshold or less than the second voltage lower limit threshold, determining that a range check abnormality occurs in the backup power supply;

[0033] Obtaining a third abnormal number of range check abnormalities of the backup power supply within the second time threshold;

[0034] Determine whether the third abnormal number is greater than the abnormal number threshold;

[0035] When it is determined that the third abnormal number is greater than the abnormal number threshold, a lower bridge backup power range check fault is output.

[0036] Optionally, a theoretical voltage value output by the first backup power port is 18V, and a theoretical voltage value output by the second backup power port is 15V.

[0037] On the other hand, the present invention further provides a fault monitoring and processing system for a controller backup power supply, wherein the fault monitoring and processing system comprises a monitoring controller for executing any of the fault monitoring and processing methods described above.

[0038] In yet another aspect, the present invention further provides a computer-readable storage medium storing instructions, wherein the instructions are used to be read by a computer so as to enable the computer to execute any of the above-mentioned fault monitoring and processing methods.

[0039] Through the above-mentioned technical scheme, the fault monitoring and processing method, system and storage medium of the controller backup power supply provided by the present invention propose different monitoring strategies for multiple backup power supplies, and provide different processing methods for possible faults of different backup power supplies, thereby achieving comprehensive monitoring of the backup power supply, improving the robustness and effectiveness of the monitoring, thereby providing the controller's power supply system with powerful information perception of the working status of the backup power supply, and improving the safety of the electric drive system.

[0040] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0042] Figure 1 is a flow chart of a method for monitoring and processing a fault of a controller backup power supply according to an embodiment of the present invention;

[0043] Figure 2 It is a flowchart of a method for determining whether a backup power supply fails according to a power supply voltage and outputting a corresponding fault signal according to a fault monitoring and processing method of a controller backup power supply according to an embodiment of the present invention;

[0044] Figure 3 is a detailed flow chart of a fault monitoring and processing method for a controller backup power supply according to an embodiment of the present invention;

[0045] Figure 4 It is a schematic diagram of a first backup power port and a second backup power port of a method for monitoring and processing a fault of a controller backup power supply according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0047] like Figure 1 FIG. 1 is a flow chart of a method for monitoring and processing a fault of a controller backup power supply according to an embodiment of the present invention. Figure 1 The fault monitoring and processing method may include the following steps:

[0048] In step S10, the bus voltage and the power supply voltage output by the backup power supply port are obtained;

[0049] In step S11, it is determined whether the bus voltage is greater than a preset first voltage threshold;

[0050] In step S12, when it is determined that the bus voltage is greater than the first voltage threshold, the diagnosis of the backup power supply is started after the preset first time threshold; when it is determined that the bus voltage is less than or equal to the first voltage threshold, the step of obtaining the voltage and the power supply voltage output by the backup power supply port is returned, that is, returning to step S10;

[0051] In step S13, it is determined whether the backup power supply fails according to the power supply voltage and a corresponding failure signal is output.

[0052] In this Figure 1 In the method shown, step S13 can be used to determine whether the backup power supply fails according to the power supply voltage and output a corresponding fault signal. In this embodiment, the method for determining whether the backup power supply fails according to the power supply voltage and outputting a corresponding fault signal can be in various forms known to those skilled in the art. In a preferred example of the present invention, the method for determining whether the backup power supply fails according to the power supply voltage and outputting a corresponding fault signal can include the following: Figure 2 The steps shown. Figure 2 In the method of determining whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal, the method may include the following steps:

[0053] In step S1300, it is determined whether the power supply voltage comes from the first backup power supply port;

[0054] In step S1301, when it is determined that the power supply voltage comes from the first backup power supply port, it is determined whether the power supply voltage is less than a preset first voltage lower limit threshold;

[0055] In step S1302, when it is determined that the power supply voltage is less than the first voltage lower limit threshold, it is determined that the backup power supply has an undervoltage abnormality;

[0056] In step S1303, the first abnormal number of undervoltage abnormalities of the backup power supply within a preset second time threshold is obtained;

[0057] In step S1304, it is determined whether the first abnormal number is greater than a preset abnormal number threshold;

[0058] In step S1305, when it is determined that the first abnormal number is greater than the abnormal number threshold, a first backup power supply undervoltage fault is output;

[0059] In step S1306, it is determined whether the power supply voltage is greater than a preset voltage recovery threshold within a preset third time threshold after the output of the first backup power supply undervoltage fault;

[0060] In step S1307, when it is determined that the power supply voltage is greater than the voltage recovery threshold within the third time threshold, it is determined that the undervoltage fault of the first backup power supply is recovered;

[0061] In step S1308, when it is determined that the power supply voltage is less than or equal to the voltage recovery threshold within the third time threshold, the backup power supply is turned off;

[0062] In step S1309, when it is determined that the power supply voltage is greater than or equal to the first voltage lower limit threshold, it is determined whether the power supply voltage is greater than a preset first voltage upper limit threshold;

[0063] In step S1310, when it is determined that the power supply voltage is greater than the first voltage upper limit threshold, it is determined that an overvoltage abnormality occurs in the backup power supply;

[0064] In step S1311, a second abnormal number of overvoltage abnormalities of the backup power supply within a second time threshold is obtained;

[0065] In step S1312, it is determined whether the second abnormal number is greater than the abnormal number threshold;

[0066] In step S1313, when it is determined that the second abnormal number is greater than the abnormal number threshold, the first backup power supply overvoltage fault is output; after the first backup power supply overvoltage fault is output, the step of shutting down the backup power supply is executed, that is, step S1308 is executed;

[0067] In step S1314, when it is determined that the power supply voltage does not come from the first backup power supply port, it is determined whether the power supply voltage comes from the second backup power supply port;

[0068] In step S1315, when it is determined that the power supply voltage comes from the second backup power supply port, it is determined whether the power supply voltage is greater than a preset second voltage upper limit threshold or less than a preset second voltage lower limit threshold;

[0069] In step S1316, when it is determined that the power supply voltage is greater than the second voltage upper limit threshold or less than the second voltage lower limit threshold, it is determined that a range check abnormality occurs in the backup power supply;

[0070] In step S1317, a third abnormal number of range check abnormalities of the backup power supply within the second time threshold is obtained;

[0071] In step S1318, it is determined whether the third abnormal number is greater than the abnormal number threshold;

[0072] In step S1319, when it is determined that the third abnormal number is greater than the abnormal number threshold, a lower bridge backup power range check fault is output.

[0073] In this implementation, the theoretical voltage values ​​output by the first backup power port and the second backup power port can be various values ​​known to those skilled in the art. In a preferred example of the present invention, the theoretical voltage value output by the first backup power port is 18V, and the theoretical voltage value output by the second backup power port is 15V. Figure 4 As shown, the bus voltage generates 4 backup power supplies through a transformer, wherein VDD18_EM is the SBC backup power supply (the first backup power supply), and VDD15_LU / LV / LW are the backup power supplies for the IGBT lower bridge drive power supply (the second backup power supply).

[0074] On the other hand, the present invention also provides a fault monitoring and processing system for a controller backup power supply, the fault monitoring and processing system comprising a monitoring controller for executing any of the above-mentioned fault monitoring and processing methods, the fault monitoring and processing method being specifically as follows: Figures 1 to 4 shown.

[0075] In yet another aspect, the present invention further provides a computer-readable storage medium storing instructions, wherein the instructions are used to be read by a computer so as to enable the computer to execute any of the above-mentioned fault monitoring and processing methods.

[0076] Through the above-mentioned technical scheme, the fault monitoring and processing method, system and storage medium of the controller backup power supply provided by the present invention propose different monitoring strategies for multiple backup power supplies, and provide different processing methods for possible faults of different backup power supplies, thereby achieving comprehensive monitoring of the backup power supply, improving the robustness and effectiveness of the monitoring, thereby providing the controller's power supply system with powerful information perception of the working status of the backup power supply, and improving the safety of the electric drive system.

[0077] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0078] The present application is described with reference to the flowcharts and / or block diagrams of the methods, 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 device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. 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.

[0079] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0080] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0081] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0082] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0083] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0084] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0085] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for monitoring and processing a fault of a controller backup power supply, characterized in that: The fault monitoring and processing method comprises: Obtain the bus voltage and the power voltage output by the backup power port; Determining whether the bus voltage is greater than a preset first voltage threshold; When it is determined that the bus voltage is greater than the first voltage threshold, starting diagnosis of the backup power supply after a preset first time threshold; It is determined whether a backup power supply fails according to the power supply voltage and a corresponding fault signal is output.

2. The fault monitoring and processing method according to claim 1, characterized in that: Determining whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes: Determining whether the power supply voltage comes from the first backup power supply port; In the case where it is determined that the power supply voltage comes from the first backup power supply port, determining whether the power supply voltage is less than a preset first voltage lower limit threshold; When it is determined that the power supply voltage is less than the first voltage lower limit threshold, determining that an undervoltage abnormality occurs in the backup power supply; Obtaining a first abnormal number of undervoltage abnormalities of the backup power supply within a preset second time threshold; Determining whether the first abnormal number is greater than a preset abnormal number threshold; When it is determined that the first abnormal number is greater than the abnormal number threshold, a first backup power supply undervoltage fault is output.

3. The fault monitoring and processing method according to claim 2, characterized in that: Determining whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes: Determine whether the power supply voltage is greater than a preset voltage recovery threshold within a preset third time threshold after the output of the first backup power supply undervoltage fault; When it is determined that the power supply voltage is greater than the voltage recovery threshold within the third time threshold, it is determined that the undervoltage fault of the first backup power supply is recovered.

4. The fault monitoring and processing method according to claim 3, characterized in that: Determining whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes: When it is determined that the power supply voltage is less than or equal to the voltage recovery threshold within the third time threshold, the backup power supply is turned off.

5. The fault monitoring and processing method according to claim 2, characterized in that: Determining whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal includes: In the case where it is determined that the power supply voltage is greater than or equal to the first voltage lower limit threshold, determining whether the power supply voltage is greater than a preset first voltage upper limit threshold; In the case where it is determined that the power supply voltage is greater than the first voltage upper limit threshold, determining that an overvoltage abnormality occurs in the backup power supply; Obtaining a second abnormal number of times that the backup power supply has an overvoltage abnormality within the second time threshold; Determine whether the second abnormal number is greater than the abnormal number threshold; When it is determined that the second abnormal number is greater than the abnormal number threshold, outputting a first backup power supply overvoltage fault; Turn off the backup power supply.

6. The fault monitoring and processing method according to claim 2, characterized in that: The method further comprises: determining whether a backup power supply fails according to the power supply voltage and outputting a corresponding fault signal; In the case where it is determined that the power supply voltage does not come from the first backup power supply port, determining whether the power supply voltage comes from the second backup power supply port; In the case where it is determined that the power supply voltage comes from the second backup power supply port, determining whether the power supply voltage is greater than a preset second voltage upper limit threshold or less than a preset second voltage lower limit threshold; When it is determined that the power supply voltage is greater than the second voltage upper limit threshold or less than the second voltage lower limit threshold, determining that a range check abnormality occurs in the backup power supply; Obtaining a third abnormal number of range check abnormalities of the backup power supply within the second time threshold; Determine whether the third abnormal number is greater than the abnormal number threshold; When it is determined that the third abnormal number is greater than the abnormal number threshold, a lower bridge backup power range check fault is output.

7. The fault monitoring and processing method according to claim 6, characterized in that: The theoretical voltage value output by the first backup power port is 18V, and the theoretical voltage value output by the second backup power port is 15V.

8. A fault monitoring and processing system for a controller backup power supply, characterized in that: The fault monitoring and processing system comprises a monitoring controller, which is used to execute the fault monitoring and processing method according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and the instructions are used to be read by a computer so that the computer executes the fault monitoring and processing method according to any one of claims 1 to 7.

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