Fault detection method and apparatus, and terminal, vehicle end and storage medium

Abstract

A fault detection method and apparatus, and a terminal, a vehicle end and a storage medium, which relate to the field of new energy. The fault detection method is applied to a redundant power supply system, and comprises: controlling a dual-path isolation switch device to be in a switched-off state; making an adjustment so that a first voltage difference exists between a first voltage output by a first power supply and a second voltage output by a second power supply; acquiring a first electrical parameter of the dual-path isolation switch device; and on the basis of the first electrical parameter, determining a fault condition of the dual-path isolation switch device. By means of performing controlling to make a first voltage difference exist between a first power supply and a second power supply, and acquiring a first electrical parameter of a dual-path isolation switch device, whether the dual-path isolation switch device is normally switched off can be determined on the basis of the first electrical parameter, and thus whether the dual-path isolation switch device has a fault is accurately identified, thereby achieving the effect of instantly finding a fault of a redundant power supply system itself, and ensuring the power supply safety of a load.

Description

Fault detection methods, devices, terminals, vehicle-mounted components, and storage media

[0001] This application claims priority to Chinese Patent Application No. 202410808761.3, filed on June 20, 2024, with the China National Intellectual Property Administration, entitled “Fault Detection Method, Apparatus, Terminal, Vehicle End and Storage Medium”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy, and in particular to a fault detection method, device, terminal, vehicle end, and storage medium. Background Technology

[0003] With technological advancements, electricity, due to its convenience and efficiency, is applied to all aspects of production and daily life. Consequently, power supply security has gradually become a key concern. Power supply security typically includes redundant power supply, power supply reliability, power supply safety, power quality, and emergency response. Redundant power supply, a highly stable power supply measure, is commonly used to power critical equipment and systems, including industrial production, data centers, hospitals, and research institutions. Furthermore, with the rapid development of new energy vehicles, redundant power supply is being widely applied in their power supply systems to ensure their safe operation.

[0004] However, redundant power supply systems are also susceptible to failure. Therefore, how to detect the faults in redundant power supply systems in a timely manner is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a fault detection method, device, terminal, vehicle terminal, and storage medium. The method can promptly detect faults in the redundant power supply system itself, thereby enabling timely troubleshooting and ensuring the power supply safety of the load.

[0006] Firstly, this application provides a fault detection method applied to a redundant power supply system. The method involves the controller of the redundant power supply system performing the following operations: controlling a dual-path disconnector to be in an open state, adjusting the first voltage output from the first power supply to maintain a first voltage difference between the first voltage output from the first power supply and the second voltage output from the second power supply, acquiring the first electrical parameters of the dual-path disconnector, and determining the fault condition of the dual-path disconnector based on the first electrical parameters.

[0007] The fault detection method provided in this application controls the existence of a first voltage difference between the first power supply and the second power supply, and obtains the first electrical parameters of the dual-channel disconnecting switch device. Based on the first electrical parameters, it can determine whether the dual-channel disconnecting switch device is normally disconnected, thereby accurately identifying whether the dual-channel disconnecting switch device is faulty, and thus achieving the effect of timely detection of faults in the redundant power supply system itself, so as to ensure the power supply safety of the load.

[0008] Optionally, the aforementioned redundant power supply system includes a first power supply, a second power supply, a dual-channel disconnector, and a controller. The output terminals of the first power supply and the second power supply are respectively connected to the first and second terminals of the dual-channel disconnector. The output terminal of the first power supply is also connected to a first load, and the output terminal of the second power supply is also connected to a second load.

[0009] Optionally, the first electrical parameter mentioned above includes a second voltage difference between the first and second terminals of the dual-channel disconnector, a first current intensity on the dual-channel disconnector, or a first resistance value on the dual-channel disconnector.

[0010] Optionally, when the first electrical parameter is the second voltage difference, it can be determined whether the dual-channel disconnecting switch is normally disconnected based on the first voltage difference and the second voltage difference. For example, if the first voltage difference is equal to the second voltage difference, the dual-channel disconnecting switch is normally disconnected; or, if the first voltage difference is not equal to the second voltage difference, the dual-channel disconnecting switch is faulty.

[0011] Optionally, the first voltage difference can be preset or dynamically changed. For example, the first voltage difference can be 1V, 2V, or 3V, etc.

[0012] In one possible implementation, the fault detection method further includes performing the following operations via a controller: adjusting for a third voltage difference between the third voltage output from the first power supply and the fourth voltage output from the second power supply, and acquiring the second electrical parameters of the dual-channel disconnector device. Determining the fault condition of the dual-channel disconnector device based on the first electrical parameters includes: determining the fault condition of the dual-channel disconnector device based on the first and second electrical parameters. Wherein, the first voltage difference is less than 0 and the third voltage difference is greater than 0, or the first voltage difference is greater than 0 and the third voltage difference is less than 0.

[0013] The above-described implementation method controls the existence of a third voltage difference between the first power supply and the second power supply, and obtains the second electrical parameters of the dual-path disconnecting switch device. Based on the first and second electrical parameters, it can determine whether the dual-path disconnecting switch device is normally disconnected, thereby accurately identifying whether the dual-path disconnecting switch device is faulty. This enables timely detection of faults in the redundant power supply system itself, ensuring the power supply safety of the load.

[0014] Optionally, the second electrical parameter includes a second voltage difference between the first and second terminals of the dual-channel disconnector, a first current intensity on the dual-channel disconnector, or a first resistance value on the dual-channel disconnector.

[0015] Optionally, the third voltage difference can be preset or dynamically changed. For example, the first voltage difference can be 1V, 2V, or 3V, etc.

[0016] In another possible implementation, the first electrical parameter is a second voltage difference, and the second electrical parameter is a fourth voltage difference. The determination of whether the dual-channel disconnector is normally open is based on the first, second, third, and fourth voltage differences. For example, if the first voltage difference equals the second voltage difference and the third voltage difference equals the fourth voltage difference, the dual-channel disconnector is normally open. If the first voltage difference is not equal to the second voltage difference, and / or the third voltage difference is not equal to the fourth voltage difference, the dual-channel disconnector is faulty.

[0017] The above-described embodiments can accurately determine whether a dual-channel disconnector has dual-channel isolation functionality. For example, if the first voltage difference equals the second voltage difference and the third voltage difference equals the fourth voltage difference, the dual-channel disconnector has dual-channel isolation functionality and is fault-free. Conversely, if the first voltage difference is not equal to the second voltage difference, and / or the third voltage difference is not equal to the fourth voltage difference, the dual-channel disconnector lacks isolation functionality in at least one direction, indicating a fault in the dual-channel disconnector.

[0018] In another possible implementation, after controlling the dual-channel disconnector to be in the open state, the method further includes performing the following operations via the controller: acquiring the voltage output by the second power supply to obtain a second voltage or a fourth voltage; adjusting the first voltage output by the first power supply to be equal to the voltage obtained by adding the second voltage to the first voltage difference; and adjusting the third voltage output by the first power supply to be equal to the voltage obtained by adding the fourth voltage to the third voltage difference.

[0019] In the above embodiments, by acquiring the voltage output of the second power supply and determining the first voltage output of the first power supply based on the voltage output of the second power supply and the first voltage difference, the voltage difference between the first voltage output of the first power supply and the voltage output of the second power supply can be the first voltage difference with a small error, or even no error. Similarly, by determining the third voltage output of the first power supply based on the voltage output of the second power supply and the third voltage difference, the voltage difference between the third voltage output of the first power supply and the voltage output of the second power supply can be the third voltage difference with a small error, or even no error. Because the voltage difference between the first and second power supply outputs has a small error compared to the design value, this embodiment can achieve high detection accuracy, thereby accurately identifying whether there is a fault in the dual-path isolating switch device, and thus achieving the effect of timely detection of faults in the redundant power supply system itself, to ensure the power supply safety of the load.

[0020] In another possible implementation, the dual-channel disconnector is fault-free when the difference between the first voltage difference and the second voltage difference is less than or equal to a first threshold, and the difference between the third voltage difference and the fourth voltage difference is less than or equal to the first threshold. The dual-channel disconnector is faulty when the difference between the first voltage difference and the second voltage difference is greater than the first threshold, and / or the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold.

[0021] In the above embodiments, the method of determining whether the dual-channel disconnector device is faulty by using a first threshold can fully take into account the errors introduced by detection errors and imperfect circuits, thereby making the detection results more accurate.

[0022] Optionally, the first threshold can be 0V, 0.1V, or 0.2V.

[0023] Optionally, the size of the first threshold depends on the structure or materials of the redundant power supply system itself, and the size of the first threshold also depends on the accuracy of the detection device.

[0024] In another possible implementation, the dual-channel disconnector includes a first switch and a second switch. The source of the first switch is connected to the source of the second switch, the drain of the first switch is connected to the output of a first power supply, and the drain of the second switch is connected to the output of a second power supply. If the difference between a first voltage difference and a second voltage difference is greater than a first threshold, the first switch is faulty. If the difference between a third voltage difference and a fourth voltage difference is greater than the first threshold, the second switch is faulty.

[0025] In the above embodiment, the drain of the first switching device is connected to the output terminal of the first power supply, so that when the first switching device is normally disconnected, the voltage output by the first power supply will not affect the second power supply. The drain of the second switching device is connected to the output terminal of the second power supply, so that when the second switching device is normally disconnected, the voltage output by the second power supply will not affect the first power supply. Therefore, when the first voltage difference is greater than 0, if the first voltage difference is not equal to the second voltage difference, it indicates that the first switching device has not been normally disconnected, i.e., the first switching device is faulty. Similarly, when the third voltage difference is less than 0, if the third voltage difference is not equal to the fourth voltage difference, it indicates that the second switching device has not been normally disconnected, i.e., the second switching device is faulty. Obviously, this embodiment can accurately determine whether the first switching device and / or the second switching device in the dual-path isolating switching device are faulty, so that in the event of a fault in the redundant power supply system, the dual-path isolating switching device can be repaired in a timely manner to restore the redundant power supply capability of the redundant power supply system.

[0026] Optionally, if the first voltage difference is less than 0 and the first voltage difference is not equal to the second voltage difference, it indicates that the second switching device has not opened normally, i.e., the second switching device is faulty. Similarly, if the third voltage difference is greater than 0 and the third voltage difference is not equal to the fourth voltage difference, it indicates that the first switching device has not opened normally, i.e., the first switching device is faulty.

[0027] Optionally, the first voltage difference is greater than 0, and the third voltage difference is less than 0. If the difference between the first and second voltage differences is greater than a first threshold, and the difference between the third and fourth voltage differences is less than or equal to the first threshold, the first switching device is faulty, and the second switching device is not faulty. If the difference between the first and second voltage differences is less than or equal to the first threshold, and the difference between the third and fourth voltage differences is greater than the first threshold, the first switching device is not faulty, and the second switching device is faulty.

[0028] Optionally, the first voltage difference is less than 0, and the third voltage difference is greater than 0. If the difference between the first and second voltage differences is greater than a first threshold, and the difference between the third and fourth voltage differences is less than or equal to the first threshold, the second switching device is faulty, and the first switching device is not faulty. If the difference between the first and second voltage differences is less than or equal to the first threshold, and the difference between the third and fourth voltage differences is greater than the first threshold, the second switching device is not faulty, and the first switching device is faulty.

[0029] In another possible implementation, the dual-channel disconnector includes a first switch and a second switch. The drain of the first switch is connected to the drain of the second switch, the source of the first switch is connected to the output terminal of a first power supply, and the source of the second switch is connected to the output terminal of a second power supply. If the difference between the first voltage difference and the second voltage difference is greater than a first threshold, the second switch is faulty. If the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold, the first switch is faulty.

[0030] In the above embodiment, the drain of the first switching device is connected to the drain of the second switching device, and the source of the first switching device is connected to the output terminal of the first power supply. This ensures that when the second switching device is normally disconnected, the voltage output by the first power supply will not affect the second power supply. Similarly, the source of the second switching device is connected to the output terminal of the second power supply, ensuring that when the first switching device is normally disconnected, the voltage output by the second power supply will not affect the first power supply. Therefore, if the first voltage difference is greater than 0, and the first voltage difference is not equal to the second voltage difference, it indicates that the second switching device has not disconnected normally, i.e., the second switching device is faulty. Likewise, if the third voltage difference is less than 0, and the third voltage difference is not equal to the fourth voltage difference, it indicates that the first switching device has not disconnected normally, i.e., the first switching device is faulty. Clearly, this embodiment can accurately determine whether the first and / or second switching devices in the dual-path isolating switching device are faulty, enabling timely repair of the dual-path isolating switching device in the event of a fault in the redundant power supply system, thereby restoring the redundant power supply capability of the redundant power supply system.

[0031] Optionally, the first voltage difference is greater than 0, and the third voltage difference is less than 0. If the difference between the first and second voltage differences is greater than a first threshold, and the difference between the third and fourth voltage differences is less than or equal to the first threshold, the second switching device is faulty, and the first switching device is not faulty. If the difference between the first and second voltage differences is less than or equal to the first threshold, and the difference between the third and fourth voltage differences is greater than the first threshold, the second switching device is not faulty, and the first switching device is faulty.

[0032] Optionally, the first voltage difference is less than 0, and the third voltage difference is greater than 0. If the difference between the first and second voltage differences is greater than a first threshold, and the difference between the third and fourth voltage differences is less than or equal to the first threshold, the first switching device is faulty, and the second switching device is not faulty. If the difference between the first and second voltage differences is less than or equal to the first threshold, and the difference between the third and fourth voltage differences is greater than the first threshold, the first switching device is not faulty, and the second switching device is faulty.

[0033] In another possible implementation, the absolute values ​​of the first voltage difference and / or the third voltage difference are greater than the second threshold.

[0034] The above-described implementation reduces the impact of detection errors, non-ideal circuits, and other factors on the detection results by ensuring that the absolute values ​​of the first voltage difference and / or the third voltage difference are greater than the second threshold, thereby improving the accuracy of the body measurement results. For example, the second threshold can be 0.5V, 1V, or 2V, etc.

[0035] In another possible implementation, the first electrical parameter is a first current intensity on the dual-channel disconnector, and the second electrical parameter is a second current intensity on the dual-channel disconnector. When both the first and second current intensities are zero, the dual-channel disconnector is fault-free. When the first and / or second current intensities are not zero, the dual-channel disconnector is faulty.

[0036] In the above embodiments, the first current intensity is the current intensity on the dual-channel disconnector when the voltage difference between the outputs of the first power supply and the second power supply is a first voltage difference. The second current intensity is the current intensity on the dual-channel disconnector when the voltage difference between the outputs of the first power supply and the second power supply is a third voltage difference. If both the first and second current intensities are zero, it indicates that the dual-channel disconnector is normally open and in an open-circuit state. Obviously, if the first current intensity and / or the second current intensity are not zero, it indicates that the dual-channel disconnector has not normally opened, i.e., the dual-channel disconnector is faulty. As can be seen from the above, determining whether a dual-channel disconnector is faulty by using current intensity is a relatively simple and effective method. For example, it is only necessary to determine whether both the first and second current intensities are zero to generate a judgment result.

[0037] In another possible implementation, the first electrical parameter is a first resistance value on the dual-channel disconnector, and the second electrical parameter is a second resistance value on the dual-channel disconnector. When both the first and second resistance values ​​are infinite, the dual-channel disconnector is fault-free. When the first and / or second resistance values ​​are less than the target resistance value, the dual-channel disconnector is faulty.

[0038] In the above embodiments, the first resistance value is the resistance value of the dual-channel isolating switch when the voltage difference between the first power supply and the second power supply is a first voltage difference. The second resistance value is the resistance value of the dual-channel isolating switch when the voltage difference between the first power supply and the second power supply is a second voltage difference. Clearly, when both the first and second resistance values ​​are infinite, it indicates that the dual-channel isolating switch is in an open state, meaning it is fault-free. Conversely, when the resistance values ​​of the first and / or second switching devices are less than the target value, it indicates that the dual-channel isolating switch is not in an open state, meaning it is faulty. As can be seen from the above, determining whether a dual-channel isolating switch is faulty by using its resistance value is a simple and effective method. For example, it is only necessary to determine whether both the first and second resistance values ​​are infinite to generate a judgment result.

[0039] Alternatively, a resistance value greater than 1*10^5Ω can be referred to as an infinite resistance value.

[0040] Optionally, the target resistance value can be a preset resistance value used to determine whether the circuit is open. For example, the target resistance value is 1*10^5Ω.

[0041] Another possible implementation is that the output voltage of the first power supply is adjustable and / or the output voltage of the second power supply is adjustable.

[0042] In the above embodiments, the output voltage of the first power supply is adjustable and / or the output voltage of the second power supply is adjustable. On the one hand, this enables the redundant power supply system to use the fault detection method provided in this application. On the other hand, it can meet the load's requirements for various voltages.

[0043] In another possible implementation, if the output voltage of the first power supply is adjustable, the second voltage is equal to the fourth voltage.

[0044] In the above embodiments, when the output voltage of the first power supply is adjustable, controlling the output voltage of the second power supply to be a fixed value can reduce the error introduced by variables, thereby improving the accuracy of the detection results.

[0045] In another possible implementation, where the output voltage of the second power supply is adjustable, the first voltage is equal to the third voltage.

[0046] In the above embodiments, when the output voltage of the second power supply is adjustable, controlling the output voltage of the first power supply to be a fixed value can reduce the error introduced by variables, thereby improving the accuracy of the detection results.

[0047] In another possible implementation, the absolute values ​​of the first voltage difference and the third voltage difference are equal.

[0048] In the above embodiments, the absolute values ​​of the first voltage difference and the third voltage difference are equal, which can reduce the error introduced by variables and thus improve the accuracy of the detection results.

[0049] Secondly, embodiments of this application provide a fault detection device, which includes a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program, causing the device to perform the fault detection method described in any of the first aspects above.

[0050] Optionally, the aforementioned fault detection device is a DC-DC converter.

[0051] Thirdly, embodiments of this application also provide a redundant power supply system, which includes a dual-path disconnector and the fault detection device described in the second aspect above.

[0052] Fourthly, embodiments of this application also provide a terminal device, which includes the fault detection device described in the second aspect or the redundant power supply system described in the third aspect.

[0053] Fifthly, a program is provided that, when executed by a processor, performs the method provided in any of the first aspects above.

[0054] Sixthly, a program product, such as a computer-readable storage medium, is provided, comprising the program of any one of the first aspects above.

[0055] A seventh aspect provides a computer-readable storage medium including a program, wherein when the program is run by a processor, the method provided in any of the first aspects is executed.

[0056] Eighthly, embodiments of this application provide a chip including a processor, the processor being configured to execute instructions, which, when executed, cause the chip to perform the fault detection method described in any of the first aspects above.

[0057] The beneficial effects of some solutions in aspects two through eight of this application can be referenced to the beneficial effects of the technical solution in aspect one. Attached Figure Description

[0058] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1A is a schematic diagram of a redundant power supply system provided in an embodiment of this application;

[0060] Figure 1B is a schematic diagram of a power supply provided in an embodiment of this application;

[0061] Figure 2 is a schematic diagram of another redundant power supply system provided in an embodiment of this application;

[0062] Figures 3A and 3B are schematic diagrams of a dual-channel disconnector device provided in an embodiment of this application;

[0063] Figure 4 is a flowchart illustrating a fault detection method provided in an embodiment of this application;

[0064] Figure 5 is a flowchart illustrating another fault detection method provided in an embodiment of this application;

[0065] Figure 6A or Figure 6C is a simplified schematic diagram of the dual-channel disconnector device shown in Figure 3A;

[0066] Figure 6B or Figure 6D is a simplified schematic diagram of the dual-channel disconnector device shown in Figure 3B;

[0067] Figure 7 is a flowchart illustrating another fault detection method provided in an embodiment of this application;

[0068] Figure 8 is a flowchart illustrating another fault detection method provided in an embodiment of this application;

[0069] Figure 9 is a flowchart illustrating another fault detection method provided in an embodiment of this application. Detailed Implementation

[0070] The embodiments described in this application are merely some, not all, of the embodiments described herein. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0071] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. In this application, "at least one" means one or more, and "more than one" means two or more. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0072] The following is an exemplary introduction to some of the technical terms used in the embodiments of this application.

[0073] 1. Redundant power supply

[0074] Redundant power supply refers to using multiple independent power sources in a power supply system to ensure that the system can still provide power to the load and maintain its normal operation even if some power sources fail. This approach aims to improve the reliability and stability of the power supply system, which is especially crucial for critical equipment. Redundancy types in power supply typically include power input redundancy, power loop redundancy, and power module redundancy, among which:

[0075] 1) Power input redundancy refers to including multiple power sources in the power supply system that can directly supply power to the load, so as to ensure that the load can obtain power from other power sources in the event of failure of some power sources.

[0076] In one possible implementation, the redundant power supply system includes two power supply circuits to supply power to two loads respectively, and both loads can achieve the target function, thereby achieving the effect of redundant power supply. As shown in Figure 1A, the redundant power supply system 100 includes a first power supply 101, a second power supply 102, a first dual-channel isolation switch device 103, and a controller 104, and supplies power to the first load and the second load.

[0077] The output terminals of the first power supply 101 and the second power supply 102 are respectively connected to the first and second terminals of the first dual-channel disconnector device 103, which is equivalent to the first power supply 101 and the second power supply 102 being connected to the two ends of the first dual-channel disconnector device 103. For example, the first power supply 101 and / or the second power supply 102 include one or more of lead-acid batteries, lithium-ion batteries, sodium-ion batteries, or supercapacitors. A detailed description of the first dual-channel disconnector device 103 can be found in Figures 3A or 3B below, and will not be elaborated upon here.

[0078] The output terminal of the first power supply 101 is also connected to the first load to form a first power supply circuit. The output terminal of the second power supply 102 is also connected to the second load to form a second power supply circuit. The first power supply circuit and the second power supply circuit are used to supply power to the first load and the second load, respectively, to realize the function of redundant power supply, thereby ensuring the power supply safety of the load and thus realizing the safe and stable operation of the load.

[0079] The first load and the second load can perform the same function. For example, both the first load and the second load can perform functions such as braking or vehicle steering.

[0080] The controller 104 is used to control the state of the first dual-channel isolation switch device 103, the output voltage of the first power supply 101, or the output voltage of the second power supply 102, etc.

[0081] For example, when the first power supply circuit and the second power supply circuit are normal, the controller 104 can control the first dual-channel isolation switch device 103 to be in the closed state, and the voltage output by the first power supply 101 is slightly higher than the voltage output by the second power supply 102. For example, the voltages output by the first power supply 101 and the second power supply 102 are 12V and 10V, respectively.

[0082] For example, in the event of a fault in either the first or second power supply circuit, the controller 104 can control the first dual-channel disconnector 103 to be in an open state to isolate the first and second power supply circuits, thereby ensuring that at least one load can operate normally. For instance, if a fault such as an open circuit, overcurrent, or overvoltage occurs in the first power supply circuit, the controller 104 can ensure that the fault in the first power supply circuit will not interfere with the second power supply circuit by controlling the first dual-channel disconnector 103 to allow the second power supply 102 to supply power to the second load through the second power supply circuit.

[0083] Of course, when the output voltage of the first power supply 101 is adjustable and / or the output voltage of the second power supply 102 is adjustable, the controller 104 can also control the output voltage of the first power supply 101 and / or the second power supply 102 to meet the load requirements.

[0084] Optionally, the connection method between the controller 104 and the first power supply 101, the second power supply 102, and the first dual-channel disconnector device 103 is not limited in this application. For example, the connection method between the controller 104 and the first power supply 101, the second power supply 102, and the first dual-channel disconnector device 103 can be an electrical connection or a wireless signal connection.

[0085] Optionally, the output voltage of the first power supply 101 is adjustable, and / or the output voltage of the second power supply 102 is adjustable. For example, referring to Figure 1B, the first power supply 101 includes a direct current to direct current converter (DCDC), through which the output voltage of the first power supply 101 is adjustable. As another example, the second power supply 102 includes a DCDC, through which the output voltage of the second power supply 102 is adjustable.

[0086] Optionally, the controller 104 can be integrated with the DC-DC converter. For example, the controller 104 and the DC-DC converter can be integrated on a circuit board or a chip. Alternatively, the controller 104 can be a separate circuit board or chip.

[0087] Optionally, the redundant power supply system 100 further includes one or more detection devices for detecting the electrical parameters of the first power supply 101, the second power supply 102, and the first dual-channel isolation switch device 103. For example, the detection device may detect the output voltage of the first power supply 101, the output voltage of the second power supply 102, the voltage difference across the first dual-channel isolation switch device 103, the current of the first dual-channel isolation switch device 103, or the on-resistance of the first dual-channel isolation switch device 103. This application does not limit the detection device used to implement the above detection functions; for example, the detection device implementing the above detection functions may be one detection device or multiple detection devices. For another example, the output voltage of the first power supply 101, the output voltage of the second power supply 102, and the voltage difference across the first dual-channel isolation switch device 103 (first terminal and second terminal) can be detected by a voltage detection circuit (voltage sensor), and the current of the first dual-channel isolation switch device 103 can be detected by a current detection circuit (current sensor). Obviously, the on-resistance of the first dual-channel disconnector 103 can be calculated from the voltage difference across the first dual-channel disconnector 103 and the current in the first dual-channel disconnector 103. Alternatively, the on-resistance of the first dual-channel disconnector 103 can be directly detected by a detection device. For example, the on-resistance of the first dual-channel disconnector 103 can be detected by a resistance detection circuit (resistance sensor).

[0088] In another possible implementation, the redundant power supply system includes three power supply circuits to supply power to three loads respectively, and all three loads can achieve the target function, thereby achieving the effect of redundant power supply. As shown in Figure 2, the redundant power supply system 100 includes a first power supply 101, a second power supply 102, a third power supply 105, a first dual-channel isolation switch device 103, a second dual-channel isolation switch device 106, and a controller 104, and supplies power to the first load, the second load, and the third load.

[0089] To avoid redundancy, the descriptions of the second power supply 102, the first dual-channel isolation switch device 103, the first load, and the second load in Figure 2 can be found in the corresponding content in Figure 1A above, and will not be repeated here.

[0090] The output terminals of the first power supply 101 and the third power supply 105 shown in Figure 2 are respectively connected to the first terminal and the second terminal of the second dual-channel isolation switch device 106. The output terminal of the third power supply 105 is also connected to the third load to form a third power supply circuit.

[0091] The first load, the second load, and the third load can all perform the same function. For example, the first load, the second load, and the third load can all perform functions such as braking or vehicle steering.

[0092] The controller 104 is also used to control the state of the second dual-channel disconnector device 106. For a specific example, please refer to the description of the controller 104 controlling the first dual-channel disconnector device 103 in Figure 1A above, which will not be repeated here. Similarly, the description of the second dual-channel disconnector device 106 can be referred to the description of the first dual-channel disconnector device 103 in Figure 1A above, which will not be repeated here.

[0093] It is understandable that the redundant power supply system 100 shown in Figure 2 includes more power supply loops, enabling it to provide safer and more stable power to the load. Of course, the redundant power supply system 100 may also include more power supply loops or more power sources to provide safer and more stable power; for the sake of simplicity, these will not be listed here.

[0094] 2) Power circuit redundancy refers to using multiple power circuits or power channels in a power supply system to ensure that the load can still draw power from other power circuits in the event of a failure in some power circuits. Specific implementation details can be found in existing technologies and will not be elaborated here.

[0095] 3) Power module redundancy refers to using multiple power modules in a power supply system so that if some power modules fail, the others can continue to provide power to the system. For specific implementation details, please refer to the relevant descriptions in existing technologies; they will not be elaborated upon here.

[0096] 2. Dual-channel disconnector device

[0097] Dual-channel disconnect switches are typically used to achieve circuit isolation or power switching functions, ensuring safe maintenance, repair, or emergency handling of circuits. For example, as shown in Figure 1A, when the main power supply fails, the dual-channel disconnect switch can promptly isolate the main power supply and activate the backup power supply to power the load, maintaining normal load operation. Similarly, when the backup power supply fails, the dual-channel disconnect switch can also promptly isolate the backup power supply, preventing interference from the backup power supply to the main power supply.

[0098] In one possible design, the dual-channel disconnector device, as shown in Figure 3A, includes a first switch device and a second switch device. The source of the first switch device is connected to the source of the second switch device, and the drain of the first switch device and the drain of the second switch device are respectively connected to the first terminal and the second terminal of the dual-channel disconnector device.

[0099] In another possible design, the dual-channel disconnector device, as shown in Figure 3B, includes a first switch device and a second switch device. The drain of the first switch device is connected to the drain of the second switch device, and the source of the first switch device and the source of the second switch device are respectively connected to the first terminal and the second terminal of the dual-channel disconnector device.

[0100] Optionally, the dual-channel isolation switching device includes a gate-turn-off thyristor (GTO), a metal-oxide-semiconductor field-effect transistor (MOSFET), an insulated-gate bipolar transistor (IGBT), a gallium nitride transistor, or a silicon carbide transistor, etc. For example, the first and second switching devices shown in Figure 3A are both GTOs.

[0101] Based on the descriptions in Figures 1A, 3A, and 3B above, it can be seen that a dual-path disconnector can isolate a faulty power supply circuit to prevent unnecessary interference to the remaining power supply circuits, thereby ensuring that the remaining power supply circuits can maintain the normal operation of the load. However, dual-path disconnectors are also susceptible to failure. When a dual-path disconnector fails, the redundant power supply system cannot perform its redundant power supply function, and therefore cannot provide a safe and stable power supply to the load.

[0102] Therefore, this application provides a fault detection method, device, terminal, vehicle-side component, and storage medium, relating to the new energy field. The fault detection method provided in this application can promptly detect and identify potential faults in the redundant power supply system itself (dual-path isolating switch device) by adjusting the voltage of the power supply in the redundant power supply system, thereby improving power supply safety.

[0103] Please refer to Figure 4, which is a flowchart illustrating a fault detection method provided in an embodiment of this application. The fault detection method shown in Figure 4 may include one or more steps S401 to S404. For example, some solutions may only include steps S401 and S404. It should be understood that, for ease of description, the method is described in the order of steps S401 to S404, and is not intended to limit the execution to this specific order. This application embodiment does not limit the order of execution, execution time, or number of executions of the above one or more steps. Steps S401 to S404 are detailed as follows:

[0104] Step S401: The controller controls the dual-channel disconnect switch to be in the open state.

[0105] The controller is, for example, the controller 104 shown in Figure 1A or Figure 2. The dual-channel disconnector is, for example, the first dual-channel disconnector 103 shown in Figure 1A or the second dual-channel disconnector 106 shown in Figure 2. For detailed descriptions of the controller 104, the first dual-channel disconnector 103, and the second dual-channel disconnector 106, please refer to the relevant descriptions in Figure 1A or Figure 2, which will not be repeated here. For the sake of brevity, the fault detection method shown in Figure 4 will be described exemplarily using the first dual-channel disconnector 103 as an example.

[0106] For example, the controller sends a control command to the dual-channel disconnector device, which controls the device to be in the open state. Clearly, when the dual-channel disconnector device is fault-free, it will open or close normally according to the control command. However, if the dual-channel disconnector device is faulty, it may not function as a circuit isolator, i.e., it may not disconnect in a timely manner.

[0107] It is understood that the method of controlling a dual-channel disconnector to be in an open / closed state typically depends on the structure or materials of the dual-channel disconnector. Therefore, this application does not limit how to control the dual-channel disconnector to be in an open state. Taking the dual-channel disconnector shown in Figure 3A as an example, the dual-channel disconnector can be controlled to be in an open state by applying a low voltage to the gates of the first and second switching devices. Correspondingly, the dual-channel disconnector can be controlled to be in a closed state by applying a high voltage to the gates of the first and second switching devices.

[0108] Step S402: Adjust the first voltage difference between the first voltage output of the first power supply and the second voltage output of the second power supply.

[0109] The first power supply is, for example, the first power supply 101 shown in Figure 1A or Figure 2 above, and the second power supply is, for example, the second power supply 102 shown in Figure 1A or Figure 2 above. For a detailed description of the first power supply 101 and the second power supply 102, please refer to the relevant descriptions in Figure 1A or Figure 2 above, which will not be repeated here.

[0110] The aforementioned first voltage difference can be a fixed value. For example, it can be preset to equal -2V, -3V, -4V, 2V, 3V, or 4V. Alternatively, the first voltage difference can be a dynamically changing value. For instance, it can be set to change periodically with the number of detections, where the number of detections can be the number of times the fault detection method provided in this application is executed. For example, the first voltage difference changes periodically with the number of detections in the order of 2V, 3V, and 4V. It is understood that if the first voltage difference is not set appropriately, the detection results may be inaccurate. By allowing the first voltage difference to change periodically, multiple different first voltage differences can be used to detect faults, thereby reducing the impact of inaccurate fault detection results due to an unreasonable first voltage difference setting, and thus ensuring the stable operation of the load. Clearly, regardless of whether the first voltage difference is a fixed or dynamically changing value, it is a known value before adjusting the first voltage output of the first power supply to establish a first voltage difference between the second voltage output of the second power supply. For example, before adjusting for a first voltage difference between the first voltage output of the first power supply and the second voltage output of the second power supply, it can be known that the first voltage difference is 2V.

[0111] The first voltage difference can take any non-zero value. For example, the range of the first voltage difference is -10V to -1V and 1V to 10V. The first voltage difference V1, the first voltage Va, and the second voltage Vb satisfy the following relationship: V1 = Va - Vb. That is, when the first voltage is greater than the second voltage, the first voltage difference is positive. When the first voltage is less than the second voltage, the first voltage difference is negative.

[0112] As described in Figure 1A above, the output voltage of the first power supply 101 is adjustable and / or the output voltage of the second power supply 102 is adjustable. Based on whether the output voltages of the first power supply 101 and the second power supply 102 are adjustable, a first voltage difference between the first voltage and the second voltage can be achieved through the following methods.

[0113] Option 1: The output voltage of the first power supply 101 is adjustable, while the output voltage of the second power supply 102 is fixed. By adjusting the first voltage output by the first power supply 101, a first voltage difference is achieved between the first voltage and the second voltage.

[0114] For example, the first power supply 101 includes a DC-DC circuit, making its output voltage adjustable. The second power supply 102 does not include a DC-DC circuit, and its output voltage is a fixed value (e.g., 5V, 10V, or 15V). Therefore, a first voltage difference can be achieved between the first and second voltages by adjusting the first voltage output of the first power supply 101. For example, if the first voltage difference is 2V and the second voltage output of the second power supply 102 is 10V, the first voltage output of the first power supply 101 can be adjusted to 12V. As another example, if the first voltage difference is -2V and the second voltage output of the second power supply 102 is 10V, the first voltage output of the first power supply 101 can be adjusted to 8V.

[0115] In some possible design schemes, the second power supply 102 is a battery, and its output voltage will fluctuate within a certain range. For example, when the battery is fully charged, its output voltage will be higher. When the battery is undercharged, its output voltage will be lower. For example, the output voltage of the second power supply 102 is 10V ± 0.2V, meaning the rated output voltage of the second power supply 102 is 10V, and it may fluctuate by 0.2V depending on its charge level. Therefore, this application also provides a possible implementation to reduce the error caused by the fluctuating voltage of the second power supply 102.

[0116] One possible implementation is to adjust the first voltage output by the first power supply to be equal to the voltage obtained by adding the second voltage to the difference between the first voltage and the second voltage.

[0117] For example, before controlling the first power supply 101 to output a first voltage, the second voltage output by the second power supply 102 is first acquired. For instance, the second voltage output by the second power supply 102 can be acquired using a voltage detection circuit (voltage sensor). Alternatively, the voltage at the second terminal of the first dual-channel isolation switch device 103 can be used as the second voltage output by the second power supply 102. After acquiring the second voltage, the first voltage output by the first power supply 101 is equal to the voltage obtained by adding the second voltage to the first voltage difference. For example, if the acquired second voltage is 10.2V and the first voltage difference is 2V, then the first voltage output by the first power supply 101 is equal to 10.2V + 2V = 12.2V. As another example, if the acquired second voltage is 9.8V and the first voltage difference is -2V, then the first voltage output by the first power supply 101 is equal to 9.8V + (-2V) = 7.8V. As can be seen, this method can make the actual voltage difference between the first power supply 101 and the second power supply 102 equal to the first voltage difference, thereby minimizing the error caused by the floating voltage of the second power supply 102 and improving the accuracy of fault detection.

[0118] It should be noted that when the first dual-channel disconnector 103 is fault-free, the voltage at its second terminal is equal to the actual output voltage of the second power supply 102. When the first dual-channel disconnector 103 is faulty, because it may carry current and act as a voltage divider, the voltage at its second terminal may not be equal to the actual output voltage of the second power supply 102. However, regardless of whether the first dual-channel disconnector 103 is faulty, the voltage at its second terminal can be used as the second output voltage of the second power supply 102, and it will not affect the final fault detection result. A detailed discussion of this inference can be found in Figures 5 or 7 below, which will not be elaborated here. Clearly, the voltage at the second terminal of the first dual-channel disconnector 103 mentioned above is the voltage measured when the first dual-channel disconnector 103 is in the open state.

[0119] Option 2: The output voltage of the first power supply 101 is fixed, while the output voltage of the second power supply 102 is adjustable. By adjusting the second voltage output by the second power supply 102, a first voltage difference is achieved between the first voltage and the second voltage.

[0120] For example, the first power supply 101 does not include a DC-DC circuit, and its output voltage is a fixed value (e.g., 5V, 10V, or 15V). The second power supply 102 includes a DC-DC circuit, making its output voltage adjustable. Therefore, a first voltage difference between the first voltage and the second voltage can be achieved by adjusting the second voltage output by the second power supply 102. For specific implementation details, please refer to the description in Scheme 1 above; further elaboration is omitted here.

[0121] In some possible design schemes, the first power supply 101 is a battery, and its output voltage will fluctuate within a certain range. In this design scheme, how to reduce the error caused by the fluctuating voltage of the first power supply 101 can be referred to the relevant description of Scheme 1 above, which will not be repeated here.

[0122] Option 3: The output voltage of the first power supply 101 is adjustable, and the output voltage of the second power supply 102 is adjustable. By adjusting the first voltage output by the first power supply 101 and / or the second voltage output by the second power supply 102, a first voltage difference is achieved between the first voltage and the second voltage.

[0123] For example, both the first power supply 101 and the second power supply 102 include a DC-DC circuit, making the output voltages of both power supplies adjustable. Therefore, a first voltage difference between the first and second voltages can be achieved by adjusting the first voltage output by the first power supply 101 and / or the second voltage output by the second power supply 102. For example, when the first voltage difference is 2V, the first and second voltages can be controlled to be 10V and 8V respectively, or 14V and 12V respectively, etc. As another example, when the first voltage difference is -2V, the first and second voltages can be controlled to be 8V and 10V respectively, or 10V and 12V respectively, etc.

[0124] Clearly, in Scheme 3, both the first power supply 101 and the second power supply 102 can output the specified voltage without introducing floating voltage errors. This provides an accurate first voltage difference for subsequent fault detection, thereby improving the accuracy of fault detection and generating accurate fault detection results.

[0125] Step S403: Obtain the first electrical parameters of the dual-channel disconnector device.

[0126] The first electrical parameter includes any one of voltage, current, or resistance. Voltage refers to the voltage across the dual-channel disconnector, i.e., the voltage difference across the dual-channel disconnector (hereinafter referred to as the second voltage difference). Current refers to the current intensity across the dual-channel disconnector (hereinafter referred to as the first current intensity). Resistance refers to the resistance of the dual-channel disconnector (hereinafter referred to as the first resistance value).

[0127] For instructions on how to obtain the first electrical parameters of the dual-channel disconnector device, please refer to the relevant description in Figure 1A above, which will not be repeated here. It should be noted that the second voltage difference can be positive or negative. Taking Figure 3A as an example, if the voltage at the first terminal of the dual-channel disconnector device is greater than the voltage at the second terminal, then the second voltage difference is positive. For example, if the voltage at the first terminal is 10V and the voltage at the second terminal is 8V, then the second voltage difference is equal to 10V - 8V = 2V. If the voltage at the first terminal of the dual-channel disconnector device is less than the voltage at the second terminal, then the second voltage difference is negative. For example, if the voltage at the first terminal is 10V and the voltage at the second terminal is 12V, then the second voltage difference is equal to 10V - 12V = -2V.

[0128] Step S404: Determine the fault status of the dual-channel disconnector based on the first electrical parameter.

[0129] Next, taking the first electrical parameter as an example, which is the second voltage difference, the first current intensity, or the first resistance value, we will introduce how to judge the fault condition of the dual-channel disconnector device based on the first electrical parameter.

[0130] Case 1: The first electrical parameter is the second voltage difference.

[0131] If the first voltage difference is not equal to the second voltage difference, the dual-channel disconnector device is faulty. For example, referring to Figure 1A above, when the first dual-channel disconnector device 103 is normally disconnected, and the voltage difference between the outputs of the first power supply 101 and the second power supply 102 is equal to the first voltage difference, the second voltage difference across the first dual-channel disconnector device 103 should be equal to the first voltage difference. Therefore, if the first voltage difference is not equal to the second voltage difference, the first dual-channel disconnector device 103 is faulty. For example, if the first voltage difference is 2V and the second voltage difference is 1V or 0V, the first dual-channel disconnector device 103 is faulty.

[0132] Optionally, the first dual-channel disconnector 103 is the dual-channel disconnector shown in Figure 3A. When the second voltage difference satisfies the condition that 0 < second voltage difference < first voltage difference, the first disconnector is faulty. When the second voltage difference is equal to 0, both the first and second disconnectors are faulty.

[0133] Of course, in some scenarios, even if the dual-channel disconnector is normally disconnected, the first voltage difference may not be equal to the second voltage difference due to interference from various components in the circuit. Therefore, in one possible implementation, the dual-channel disconnector is considered faulty only when the difference between the first and second voltage differences is greater than a first threshold. For example, the dual-channel disconnector is considered faulty only when the second voltage difference satisfies: 0 ≤ second voltage difference < (first voltage difference - first threshold). As another example, if the first dual-channel disconnector 103 is the dual-channel disconnector shown in Figure 3A, the first disconnector is faulty when the second voltage difference satisfies: 0 < second voltage difference < (first voltage difference - first threshold). When the second voltage difference is equal to 0, both the first and second disconnectors are faulty.

[0134] Case 2: The first electrical parameter is the first current intensity.

[0135] If the first current intensity is not equal to 0, the dual-channel disconnector device is faulty. For example, referring to Figure 1A above, when the first dual-channel disconnector device 103 is normally disconnected, the first power supply circuit and the second power supply circuit are open. Therefore, no current flows through the first dual-channel disconnector device 103, and its first current intensity is 0. Correspondingly, if the current intensity of the first dual-channel disconnector device 103 is not equal to 0, it indicates that it has not completed the disconnection as instructed, meaning the first dual-channel disconnector device 103 is faulty.

[0136] Case 3: The first electrical parameter is the first resistance value.

[0137] If the resistance value of the first dual-channel disconnector is not infinite, the dual-channel disconnector device is faulty. For example, referring to Figure 1A above, when the first dual-channel disconnector device 103 is normally disconnected, there is an open circuit between the first and second power supply circuits. Therefore, the resistance value of the first dual-channel disconnector device 103 is equivalent to infinity. Correspondingly, if the resistance value of the first dual-channel disconnector device 103 is not infinite, it indicates that it has not disconnected as instructed, meaning the first dual-channel disconnector device 103 is faulty.

[0138] As described above, by controlling the existence of a first voltage difference between the first power supply and the second power supply, and obtaining the first electrical parameters of the dual-channel disconnector, it is possible to determine whether the dual-channel disconnector is properly disconnected, thereby accurately identifying whether the dual-channel disconnector is faulty, and thus achieving the effect of timely detection of faults in the redundant power supply system itself, so as to ensure the power supply safety of the load.

[0139] Please refer to Figure 5, which is a flowchart illustrating another fault detection method provided in this application embodiment. The fault detection method shown in Figure 5 may include one or more steps S501 to S506. For example, some solutions may only include steps S501 and S506. It should be understood that, for ease of description, the method is described in the order of steps S501 to S506, and is not intended to limit the execution to this order. This application embodiment does not limit the order of execution, execution time, or number of executions of the above one or more steps. Steps S501 to S506 are as follows:

[0140] Step S501: The controller controls the dual-channel disconnector to be in the open state. For a detailed implementation, please refer to the description of step S401 above; it will not be repeated here.

[0141] Step S502: Adjust the voltage difference between the first voltage output by the first power supply and the second voltage output by the second power supply. For detailed implementation, please refer to the description of step S402 above; it will not be repeated here.

[0142] Step S503: Obtain the first electrical parameters of the dual-channel disconnector. For detailed implementation, please refer to the description of step S403 above; it will not be repeated here.

[0143] Step S504: Adjust the third voltage output of the first power supply to have a third voltage difference with the fourth voltage output of the second power supply.

[0144] The first power supply is, for example, the first power supply 101 shown in Figure 1A or Figure 2 above, and the second power supply is, for example, the second power supply 102 shown in Figure 1A or Figure 2 above. For a detailed description of the first power supply 101 and the second power supply 102, please refer to the relevant descriptions in Figure 1A or Figure 2 above, which will not be repeated here.

[0145] The aforementioned second voltage difference can be a fixed value or a dynamically changing value. For a detailed explanation, please refer to the corresponding description in step S402 above.

[0146] The third voltage difference can take any non-zero value. For example, the range of the third voltage difference is -10V to -1V and 1V to 10V. The third voltage difference V3, the third voltage Vc, and the fourth voltage Vd satisfy the following relationship: V3 = Vc - Vd. That is, when the third voltage is greater than the fourth voltage, the third voltage difference is positive. When the third voltage is less than the fourth voltage, the third voltage difference is negative.

[0147] As described in Figure 1A above, the output voltage of the first power supply 101 is adjustable and / or the output voltage of the second power supply 102 is adjustable. Based on whether the output voltages of the first power supply 101 and the second power supply 102 are adjustable, a third voltage difference between the third and fourth voltages can be achieved through the following methods.

[0148] Option 1: The output voltage of the first power supply 101 is adjustable, while the output voltage of the second power supply 102 is fixed. A third voltage difference is achieved between the third and fourth voltages by adjusting the third voltage output by the first power supply 101. One possible implementation is to adjust the third voltage output by the first power supply to be equal to the voltage obtained by adding the fourth voltage to the third voltage difference. For specific implementation details, please refer to the description of Option 1 in Figure 4 above; further elaboration is omitted here.

[0149] It is understandable that when the output voltage of the first power supply 101 is adjustable and the output voltage of the second power supply 102 is a fixed value, the first voltage is not equal to the third voltage, and the second voltage is equal to the fourth voltage. This method shows that the voltage output by the first power supply 101 is variable, while the voltage output by the second power supply 102 is a fixed value. This method can reduce the error introduced by the variable, thereby improving the accuracy of the detection results.

[0150] Option 2: The output voltage of the first power supply 101 is fixed, while the output voltage of the second power supply 102 is adjustable. A third voltage difference is achieved between the third and fourth voltages by adjusting the third voltage output by the second power supply 102. One possible implementation is to adjust the fourth voltage output by the second power supply to be equal to the voltage obtained by subtracting the third voltage from the third voltage difference. For specific implementation details, please refer to the description of Option 1 in Figure 4 above; further elaboration is omitted here.

[0151] It is understandable that when the output voltage of the first power supply 101 is a fixed value and the output voltage of the second power supply 102 is adjustable, the first voltage is equal to the third voltage, but the second voltage is not equal to the fourth voltage. This method shows that the voltage output by the first power supply 101 is a fixed value, while the voltage output by the second power supply 102 is variable. This method can reduce the error introduced by the variable, thereby improving the accuracy of the detection results.

[0152] Option 3: The output voltage of the first power supply 101 is adjustable, and the output voltage of the second power supply 102 is adjustable. By adjusting the third voltage output by the first power supply 101 and / or the fourth voltage output by the second power supply 102, a third voltage difference is achieved between the third and fourth voltages.

[0153] The above analysis shows that reducing the error introduced by variables can improve the accuracy of the detection results. Therefore, even if the output voltages of the first power supply 101 and the second power supply 102 are both adjustable, it is possible to make the first voltage equal to the third voltage, or the second voltage equal to the fourth voltage.

[0154] The specific implementation of the above three schemes can be referred to the corresponding description in step S402 above, and will not be repeated here.

[0155] In one possible implementation, the values ​​of the first voltage difference and the third voltage difference can be any of the following relationships.

[0156] Relationship 1: The first voltage difference is greater than 0, and the third voltage difference is less than 0;

[0157] Relationship 2: The first voltage difference is less than 0, and the third voltage difference is greater than 0.

[0158] In another possible implementation, the absolute value of the first voltage difference and / or the third voltage difference is greater than a second threshold. The second threshold can be a preset value or a dynamically changing value; this application does not limit this. By ensuring that the absolute value of the first voltage difference and / or the third voltage difference is greater than the second threshold, the influence of factors such as detection errors and non-ideal circuits on the detection results can be reduced, thereby improving the accuracy of the body measurement results. For example, the second threshold can be 0.5V, 1V, or 2V, etc.

[0159] Clearly, regardless of "Relationship 1" or "Relationship 2," the first voltage difference and the third voltage difference are both positive and negative. This method can detect the bidirectional conductivity of the dual-channel disconnector, thereby accurately determining whether the dual-channel disconnector is faulty and which of the dual-channel disconnectors is faulty. The specific detection logic can be found in the relevant description in step S506, which will not be detailed here.

[0160] Step S505: Obtain the second electrical parameters of the dual-channel isolation switch device.

[0161] The second electrical parameter also includes any one of voltage, current, or resistance. Voltage refers to the voltage across the dual-channel disconnector, i.e., the voltage difference across the dual-channel disconnector (hereinafter referred to as the fourth voltage difference). Current refers to the current intensity across the dual-channel disconnector (hereinafter referred to as the second current intensity). Resistance is the resistance of the dual-channel disconnector (hereinafter referred to as the second resistance value).

[0162] Regarding how to obtain the second electrical parameters of the dual-channel disconnector device, please refer to the relevant description in Figure 1A above, which will not be repeated here. It should be noted that the second voltage difference can be positive or negative. Taking Figure 3A as an example, if the voltage at the first terminal of the dual-channel disconnector device is greater than the voltage at the second terminal, then the third voltage difference is positive. If the voltage at the first terminal of the dual-channel disconnector device is less than the voltage at the second terminal, then the fourth voltage difference is negative. Further details regarding the third voltage difference can be found in the description of the first voltage difference in step S403 above, which will not be repeated here.

[0163] Optionally, the first electrical parameter and the second electrical parameter have the same properties. For example, both the first and second electrical parameters can be voltage, current, or resistance. By making the first and second electrical parameters have the same properties, a unified judgment standard can be used, making it easier to generate the final detection result. Of course, even if the first and second electrical parameters have different properties, the final detection result can still be generated. For specific implementation methods, please refer to the relevant description of step S506 below, which will not be detailed here.

[0164] Step S506: Determine the fault status of the dual-channel disconnector based on the first electrical parameter and the second electrical parameter.

[0165] The following sections will describe how to determine the fault status of the dual-path disconnector based on the attributes of the first and second electrical parameters. It should be noted that all examples provided below are based on Figures 1A, 3A, and 3B, and the relationship between the first voltage difference and the third voltage difference is "Relationship One" as shown in step S504. For redundant power supply systems with the structure shown in Figure 2, or where the relationship between the first and third voltage differences is "Relationship Two" as shown in step S504, the following examples can also be used to determine whether the dual-path disconnector is faulty. To avoid redundancy, specific examples will not be provided.

[0166] Case 1: The first electrical parameter is the second voltage difference, and the second electrical parameter is the fourth voltage difference.

[0167] In this case, the fault status of the dual-channel disconnector can be determined based on the first voltage difference, the second voltage difference, the third voltage difference, and the fourth voltage difference. The fault status of the dual-channel disconnector includes whether it is faulty or not. If it is faulty, it can be further divided into a fault in the first disconnector and / or a fault in the second disconnector.

[0168] One possible way to determine this is that if the first voltage difference equals the second voltage difference and the third voltage difference equals the fourth voltage difference, the dual-channel disconnector is fault-free.

[0169] The first voltage difference equals the second voltage difference, indicating that the difference between the output voltage of the first power supply and the output voltage of the second power supply is equal to the voltage difference across the dual-channel disconnector. Since the first voltage difference is greater than 0, it can be concluded that the circuit from the first terminal to the second terminal of the dual-channel disconnector is open.

[0170] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, the first terminal of the dual-channel disconnector device is in an open-circuit state to the second terminal only when the first switch is normally disconnected. Taking the dual-channel disconnector device shown in Figure 3B as an example, the first terminal of the dual-channel disconnector device is in an open-circuit state to the second terminal only when the second switch is normally disconnected. Therefore, the first voltage difference equals the second voltage difference, which confirms that one of the switches in the dual-channel disconnector device is fault-free.

[0171] The third voltage difference equals the fourth voltage difference, indicating that the difference between the output voltage of the first power supply and the output voltage of the second power supply is equal to the voltage difference across the dual-channel disconnector. Since the third voltage difference is greater than 0, it can be concluded that the second terminal of the dual-channel disconnector is open-circuited to the first terminal.

[0172] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, the second terminal of the dual-channel disconnector device is in an open-circuit state to the first terminal only when the second switch device is normally disconnected. Taking the dual-channel disconnector device shown in Figure 3B as an example, the second terminal of the dual-channel disconnector device is in an open-circuit state to the first terminal only when the first switch device is normally disconnected.

[0173] Therefore, the third voltage difference equals the fourth voltage difference, which confirms that the other switch in the dual-channel disconnector is fault-free. Combined with the above-mentioned judgment structure that the first voltage difference equals the second voltage difference, it can be determined that both switches in the dual-channel disconnector are fault-free.

[0174] In one possible implementation, the dual-channel disconnector is fault-free when the difference between the first voltage difference and the second voltage difference is less than or equal to a first threshold, and the difference between the third voltage difference and the fourth voltage difference is less than or equal to the first threshold.

[0175] The first threshold depends on factors such as detection error and non-ideal circuits. For example, the first threshold is equal to 0.1V or 0.2V.

[0176] For example, when the first voltage difference and the second voltage difference are less than or equal to a first threshold, the first terminal of the dual-channel disconnector is considered to be in an open-circuit state to the second terminal. When the third voltage difference and the fourth voltage difference are less than or equal to the first threshold, the second terminal of the dual-channel disconnector is considered to be in an open-circuit state to the first terminal. Specific examples can be found in the corresponding descriptions above, and will not be repeated here.

[0177] Another possible way to determine this is that if the first voltage difference is equal to the second voltage difference, and the third voltage difference is not equal to the fourth voltage difference, then the dual-channel disconnector is faulty.

[0178] Based on the above analysis, when the first voltage difference is greater than 0 and the third voltage difference is less than 0, the first voltage difference equals the second voltage difference, indicating that the first terminal of the dual-channel disconnector is open-circuit to the second terminal. Correspondingly, when the third voltage difference is not equal to the fourth voltage difference, it indicates that the second terminal of the dual-channel disconnector is closed-circuit to the first terminal. The condition that the third voltage difference is not equal to the fourth voltage difference includes either the third voltage difference being less than the fourth voltage difference, or the third voltage difference being greater than the fourth voltage difference.

[0179] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, based on the above description, it can be seen that: if the first voltage difference is equal to the second voltage difference, it indicates that the first disconnector device is fault-free; correspondingly, if the third voltage difference is not equal to the fourth voltage difference, it indicates that the second disconnector device is faulty. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, based on the above description, it can be seen that: if the first voltage difference is equal to the second voltage difference, it indicates that the second disconnector device is fault-free; correspondingly, if the third voltage difference is not equal to the fourth voltage difference, it indicates that the first disconnector device is faulty.

[0180] Optionally, continuing with the example of the dual-channel disconnector device shown in Figure 3A, when the first disconnector device is fault-free but the second disconnector device is faulty, the first disconnector device is equivalent to a diode, and the second disconnector device is equivalent to a closed circuit. The cathode of the diode is connected to the first terminal of the dual-channel disconnector device, and the anode of the diode is connected to the source of the second disconnector device, as shown in Figure 6A. Therefore, when the first voltage difference is greater than 0, due to the action of the diode, the dual-channel disconnector device is equivalent to an open circuit, making the first voltage difference equal to the second voltage difference. When the third voltage difference is less than 0, the diode conducts and shares a portion of the voltage, making the dual-channel disconnector device equivalent to a closed circuit, and the third voltage difference is greater than the fourth voltage difference.

[0181] Optionally, continuing with the example of the dual-channel disconnector device shown in Figure 3B, when the first disconnector device is faulty and the second disconnector device is not faulty, the first disconnector device is equivalent to a closed circuit, and the second disconnector device is equivalent to a diode. The anode of the diode is connected to the second terminal of the dual-channel disconnector device, and the cathode of the diode is connected to the drain of the first disconnector device, as shown in Figure 6B. Therefore, when the first voltage difference is greater than 0, due to the action of the diode, the dual-channel disconnector device is equivalent to an open circuit, making the first voltage difference equal to the second voltage difference. When the third voltage difference is less than 0, the diode conducts and shares a portion of the voltage, making the dual-channel disconnector device equivalent to a closed circuit, and the third voltage difference is greater than the fourth voltage difference.

[0182] In one possible implementation, the dual-channel disconnector is faulty if the difference between the first voltage difference and the second voltage difference is less than or equal to a first threshold, and the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold.

[0183] The first threshold depends on factors such as detection error and non-ideal circuits. For example, the first threshold is equal to 0.1V or 0.2V.

[0184] For example, if the difference between the first voltage difference and the second voltage difference is less than or equal to the first threshold, the first terminal of the dual-channel disconnector is considered to be in an open-circuit state to the second terminal. If the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold, the second terminal of the dual-channel disconnector is considered to be in a closed-circuit state to the first terminal. Specific examples can be found in the corresponding descriptions above, and will not be repeated here.

[0185] Another possible way to determine this is that if the first voltage difference is not equal to the second voltage difference, and the third voltage difference is equal to the fourth voltage difference, then the dual-channel disconnector is faulty.

[0186] Based on the above analysis, when the first voltage difference is greater than 0 and the third voltage difference is less than 0, the third voltage difference equals the fourth voltage difference, indicating that the second terminal of the dual-channel disconnector is open-circuited to the first terminal. Conversely, when the first voltage difference is not equal to the second voltage difference, it indicates that the first terminal of the dual-channel disconnector is closed-circuited to the second terminal. The condition that the first voltage difference is not equal to the second voltage difference includes either the first voltage difference being less than the second voltage difference, or the first voltage difference being greater than the second voltage difference.

[0187] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, based on the above description, it can be seen that: a third voltage difference equal to a fourth voltage difference indicates that the second disconnector device is fault-free; correspondingly, a first voltage difference not equal to a second voltage difference indicates that the first disconnector device is faulty. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, based on the above description, it can be seen that: a third voltage difference equal to a fourth voltage difference indicates that the first disconnector device is fault-free; correspondingly, a first voltage difference not equal to a second voltage difference indicates that the second disconnector device is faulty.

[0188] Optionally, continuing with the example of the dual-channel disconnector device shown in Figure 3A, when the first disconnector device is faulty and the second disconnector device is not faulty, the first disconnector device is equivalent to a closed circuit, and the second disconnector device is equivalent to a diode. The anode of the diode is connected to the source of the first disconnector device, and the cathode of the diode is connected to the second terminal of the dual-channel disconnector device, as shown in Figure 6C. Therefore, when the first voltage difference is greater than 0, due to the action of the diode, the dual-channel disconnector device is equivalent to an open circuit, making the first voltage difference equal to the second voltage difference. When the third voltage difference is less than 0, the diode conducts and shares a portion of the voltage, making the dual-channel disconnector device equivalent to a closed circuit, and the third voltage difference is greater than the fourth voltage difference.

[0189] Optionally, continuing with the example of the dual-channel disconnector device shown in Figure 3B, when the first disconnector device is fault-free but the second disconnector device is faulty, the first disconnector device is equivalent to a diode, and the second disconnector device is equivalent to a closed circuit. The anode of the diode is connected to the first terminal of the dual-channel disconnector device, and the cathode of the diode is connected to the drain of the second disconnector device, as shown in Figure 6D. Therefore, when the first voltage difference is greater than 0, the diode conducts and shares a portion of the voltage, making the dual-channel disconnector device equivalent to a closed circuit, and the first voltage difference is greater than the second voltage difference. When the third voltage difference is less than 0, the dual-channel disconnector device is equivalent to an open circuit, making the third voltage difference equal to the fourth voltage difference.

[0190] In one possible implementation, the dual-channel disconnector is faulty if the difference between the first voltage difference and the second voltage difference is greater than a first threshold, and the difference between the third voltage difference and the fourth voltage difference is less than or equal to the first threshold.

[0191] The first threshold depends on factors such as detection error and non-ideal circuits. For example, the first threshold is equal to 0.1V or 0.2V.

[0192] For example, if the difference between the first voltage difference and the second voltage difference is greater than a first threshold, the first terminal of the dual-channel disconnector is considered to be in a closed-circuit state from the second terminal to the second terminal. If the difference between the third voltage difference and the fourth voltage difference is less than or equal to the first threshold, the second terminal of the dual-channel disconnector is considered to be in a closed-circuit state from the first terminal. Specific examples can be found in the corresponding descriptions above, and will not be repeated here.

[0193] Another possible way to determine this is that if the first voltage difference is not equal to the second voltage difference, and the third voltage difference is not equal to the fourth voltage difference, then the dual-channel disconnector is faulty.

[0194] Based on the above analysis, when the first voltage difference is greater than 0 and the third voltage difference is less than 0, the first voltage difference is not equal to the second voltage difference, indicating that the first terminal of the dual-channel disconnector is in a closed-circuit state to the second terminal. Correspondingly, when the third voltage difference is not equal to the fourth voltage difference, it indicates that the second terminal of the dual-channel disconnector is in a closed-circuit state to the first terminal. Here, "the first voltage difference is not equal to the second voltage difference" includes either "the first voltage difference is less than the second voltage difference" or "the first voltage difference is greater than the second voltage difference." Similarly, "the third voltage difference is not equal to the fourth voltage difference" includes either "the third voltage difference is less than the fourth voltage difference" or "the third voltage difference is greater than the fourth voltage difference."

[0195] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, based on the above description, it can be seen that: if the first voltage difference is not equal to the second voltage difference, it indicates that the first disconnector device is faulty; correspondingly, if the third voltage difference is not equal to the fourth voltage difference, it indicates that the second disconnector device is faulty. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, based on the above description, it can be seen that: if the first voltage difference is not equal to the second voltage difference, it indicates that the second disconnector device is faulty; correspondingly, if the third voltage difference is not equal to the fourth voltage difference, it indicates that the first disconnector device is faulty. Specific examples can be found in the corresponding descriptions above, and will not be repeated here.

[0196] In one possible implementation, the dual-channel disconnector is faulty if the difference between the first voltage difference and the second voltage difference is greater than a first threshold, and the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold.

[0197] The first threshold depends on factors such as detection error and non-ideal circuits. For example, the first threshold is equal to 0.1V or 0.2V.

[0198] For example, if the difference between the first voltage difference and the second voltage difference is greater than a first threshold, the first terminal of the dual-channel disconnector is considered to be in a closed-circuit state to the second terminal. If the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold, the second terminal of the dual-channel disconnector is considered to be in a closed-circuit state to the first terminal. Specific examples can be found in the corresponding descriptions above, and will not be repeated here.

[0199] Of course, the above examples are all based on the premise that the first voltage difference is greater than 0 and the third voltage difference is less than 0, for illustrative purposes. When the first voltage difference is less than 0 and the third voltage difference is greater than 0, the same judgment result can be obtained by following the above analysis logic. To avoid redundancy, this will not be elaborated further here.

[0200] Case 2: The first electrical parameter is the first current intensity, and the second electrical parameter is the second current intensity.

[0201] In this case, the fault status of the dual-channel disconnector can be determined based on the first current intensity and the second current intensity. The fault status of the dual-channel disconnector includes whether it is faulty or not. If it is faulty, it can be further divided into a fault in the first disconnector and / or a fault in the second disconnector.

[0202] One possible way to determine this is that if both the first and second current intensities are zero, the dual-channel disconnector is fault-free.

[0203] The first current intensity is the current intensity across the dual-channel disconnector when the voltage difference between the first and second power supplies is a first voltage difference. The second current intensity is the current intensity across the dual-channel disconnector when the voltage difference between the first and second power supplies is a third voltage difference. If both the first and second current intensities are zero, it indicates that the dual-channel disconnector is normally open and in an open-circuit state.

[0204] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, the first current intensity and the second current intensity are both 0, indicating that the first end of the dual-channel disconnector device is in an open circuit state from the second end, and the second end of the dual-channel disconnector device is also in an open circuit state from the first end. Therefore, it can be determined that the dual-channel disconnector device is normally disconnected and has no fault.

[0205] Another possible way to determine this is that if the first current intensity is 0 and the second current intensity is greater than 0, the dual-channel disconnector device is faulty.

[0206] Based on the above analysis, the first current intensity of 0 indicates that there is a normally disconnected switch in the dual-channel disconnector system, while the second current intensity greater than 0 indicates that there is a faulty switch in the dual-channel disconnector system.

[0207] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, a first current intensity of 0 indicates that the first disconnector device is fault-free, and correspondingly, a second current intensity greater than 0 indicates that the second disconnector device is faulty. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, a first current intensity of 0 indicates that the second disconnector device is fault-free, and correspondingly, a second current intensity greater than 0 indicates that the first disconnector device is faulty.

[0208] Another possible way to determine this is that if the first current intensity is greater than 0 and the second current intensity is 0, then the dual-channel disconnector is faulty.

[0209] A first current intensity greater than 0 indicates that at least one of the dual-channel disconnecting devices is faulty, while a second current intensity of 0 indicates that there is another normally disconnecting device in the dual-channel disconnecting device.

[0210] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, a first current intensity greater than 0 indicates that the first disconnector device is faulty, and correspondingly, a second current intensity of 0 indicates that the second disconnector device is not faulty. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, a first current intensity greater than 0 indicates that the second disconnector device is faulty, and correspondingly, a second current intensity of 0 indicates that the first disconnector device is not faulty.

[0211] Another possible way to determine this is that if both the first and second current intensities are greater than 0, the dual-channel disconnector is faulty.

[0212] If both the first and second current intensities are greater than 0, it indicates that neither of the two switches in the dual-channel disconnector has properly disconnected, therefore the dual-channel disconnector is faulty. Specific examples can be found in the corresponding content above, and will not be repeated here.

[0213] Case 3: The first electrical parameter is the first resistance value, and the second electrical parameter is the second resistance value.

[0214] In this case, the fault status of the dual-channel disconnector can be determined based on the first resistance value and the second resistance value. The fault status of the dual-channel disconnector includes whether it is faulty or not. If it is faulty, it can be further divided into a fault in the first disconnector and / or a fault in the second disconnector.

[0215] One possible way to determine this is that if both the first and second resistance values ​​are infinite, the dual-channel disconnector is fault-free.

[0216] The first resistance value is the resistance value of the dual-channel disconnector when the voltage difference between the outputs of the first power supply and the second power supply is a first voltage difference. The second resistance value is the resistance value of the dual-channel disconnector when the voltage difference between the outputs of the first power supply and the second power supply is a second voltage difference.

[0217] Obviously, when both the first and second resistance values ​​are infinite, it indicates that the dual-channel disconnector is in the open state, meaning that the dual-channel disconnector is fault-free.

[0218] For example, a resistance value greater than 1*10^5Ω can be described as an infinite resistance value.

[0219] Another possible way to determine this is if the first resistance value is infinite and the second resistance value is less than the target resistance value, indicating that the dual-channel disconnector is fault-free.

[0220] Based on the above analysis, the first resistance value being infinite indicates that one of the dual-channel disconnecting devices is normally open, while the second resistance value being less than the target resistance value indicates that another device in the dual-channel disconnecting device is faulty. The target resistance value can be a preset value used to determine whether the circuit is open. For example, the target resistance value could be 1*10^5Ω.

[0221] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, an infinite first resistance value indicates that the first disconnector device is fault-free; correspondingly, a second resistance value less than the target resistance value indicates that the second disconnector device is faulty. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, an infinite first resistance value indicates that the second disconnector device is fault-free; correspondingly, a second resistance value less than the target resistance value but greater than 0 indicates that the first disconnector device is faulty.

[0222] Another possible way to determine this is that if the first resistance value is less than the target resistance value and the second resistance value is infinite, then the dual-channel disconnector is fault-free.

[0223] Based on the above analysis, it can be seen that the first resistance value is less than the target resistance value, indicating that at least one of the dual-channel disconnector devices is faulty, while the second resistance value is infinite, indicating that there is another fault-free device in the dual-channel disconnector device.

[0224] For example, taking the dual-channel disconnector device shown in Figure 3A as an example, a first resistance value less than the target resistance value indicates a fault in the first disconnector device; correspondingly, a second resistance value of infinity indicates that the second disconnector device is fault-free. Similarly, taking the dual-channel disconnector device shown in Figure 3B as an example, a first resistance value less than the target resistance value indicates a fault in the second disconnector device; correspondingly, a second resistance value of infinity indicates that the first disconnector device is fault-free.

[0225] Another possible way to determine this is that if both the first resistance value and the second resistance value are less than the target resistance value, the dual-channel disconnector is faulty.

[0226] If both the first and second resistance values ​​are less than the target resistance value, it indicates that neither of the two switches in the dual-channel disconnector has properly disconnected, therefore the dual-channel disconnector is faulty. For a specific example, please refer to the corresponding content above; it will not be repeated here.

[0227] In this embodiment, by adjusting the voltage output of the power supply connected to both ends of the dual-channel disconnector and obtaining the electrical parameters of the dual-channel disconnector, it is possible to analyze whether the dual-channel disconnector has malfunctioned and which of the two disconnector devices has malfunctioned. This allows for timely detection of faults in the redundant power supply system itself, enabling prompt fault handling to ensure the safety of the load's power supply.

[0228] Please refer to Figure 7 next, which is a flowchart illustrating another fault detection method provided in an embodiment of this application. It is understood that the steps in this embodiment can be considered reasonable modifications or supplements to the embodiment in Figure 5 above; or, it is understood that the fault detection method in this embodiment can also be considered an embodiment that can be executed independently, and this application does not impose any limitations on this.

[0229] The fault detection method may include one or more steps from S701 to S706. It should be understood that, for ease of description, the method is described in the order of steps S701 to S706, and is not intended to limit the execution to this order. This application embodiment does not limit the order of execution, execution time, or number of executions of the above one or more steps. Steps S701 to S706 are as follows:

[0230] Step S701: Control the dual-channel isolating switch device to disconnect.

[0231] The dual-channel disconnector device is, for example, the first dual-channel disconnector device 103 or the second dual-channel disconnector device 106 described above. For details on the specific implementation of controlling the disconnector device to open, please refer to the description of step S401 above; it will not be repeated here.

[0232] Step S702: Obtain the first voltage V1 output by the first power supply.

[0233] The first power source is, for example, the first power source 101 described above. Exemplarily, the first voltage V1 output by the first power source 101 can be obtained through a voltage detection circuit (voltage sensor). The specific implementation method can be found in the description of step S402 above, and will not be repeated here.

[0234] Of course, the first power source can also be the second power source 102 or the third power source 105, etc. The embodiments described below use the first power source 101 as an example. When the first power source is the second power source 102 or the third power source 105, the specific implementation using the first power source 101 can be referred to.

[0235] Step S703: Control the second power supply to output the second voltage V2, V2 = V1 + ΔV.

[0236] The second power supply is, for example, the second power supply 102 described above, and it can also be the third power supply 105 described above. For example, when the dual-channel disconnector is the first dual-channel disconnector 103, the second power supply can be the second power supply 102 described above. When the dual-channel disconnector is the second dual-channel disconnector 106, the second power supply can be the third power supply 105 described above. The following description will exemplify the use of the second power supply 102 as the second power supply and the first dual-channel disconnector 103 as the dual-channel disconnector.

[0237] The value of ΔV can be positive or negative. When ΔV is positive, V2 is greater than V1. When ΔV is negative, V2 is less than V1.

[0238] Step S704: Determine whether the voltage difference across the dual-channel disconnector is equal to ΔV.

[0239] For example, the voltage across the dual-channel disconnector can be collected, and the voltage difference across the dual-channel disconnector can be calculated. This voltage difference is, for example, the second voltage difference mentioned above. This application does not limit how the voltage across the dual-channel disconnector is collected. For example, the voltage across the dual-channel disconnector can be collected separately using a voltage sensor. Regarding how to calculate the voltage difference across the dual-channel disconnector, please refer to the description of step S403 above, which will not be repeated here.

[0240] Optionally, if the voltage difference across the dual-channel disconnector is not equal to ΔV, then the dual-channel disconnector is determined to be faulty.

[0241] Optionally, if the voltage difference across the dual-channel disconnector is not equal to ΔV, the value of ΔV and the structure of the dual-channel disconnector can be used to further determine which of the two disconnector devices is faulty. The specific determination process can be found in the description of step S506 above, and will not be repeated here.

[0242] Optionally, if the voltage difference across the dual-channel disconnector is equal to ΔV, then step S705 is executed to further determine the dual-channel disconnector.

[0243] Optionally, steps S703 and S704 are executed cyclically to obtain the voltage difference across multiple dual-channel disconnecting devices, thereby more accurately determining whether the voltage difference across the dual-channel disconnecting devices is equal to ΔV, and thus more accurately identifying whether a fault exists in the dual-channel disconnecting devices. This application does not limit the number of times steps S703 and S704 are executed cyclically. For example, they can be executed i times, where i is an integer greater than 1. For example, i could be 3, 5, or 7, etc.

[0244] Step S705: Control the second power supply to output the second voltage V3, V3 = V1 - ΔV.

[0245] For a detailed description of the second power source, please refer to the description of step S703 above, which will not be repeated here.

[0246] The value of ΔV can be positive or negative. When ΔV is positive, V2 is greater than V1, and V3 is less than V1. When ΔV is negative, V2 is less than V1, and V3 is greater than V1.

[0247] Step S706: Determine whether the voltage difference across the dual-channel disconnector is equal to -ΔV.

[0248] For example, the voltage across the dual-channel disconnector can be collected, and the voltage difference across the dual-channel disconnector can be calculated. This voltage difference is, for example, the fourth voltage difference mentioned above. This application does not limit how the voltage across the dual-channel disconnector is collected. For example, the voltage across the dual-channel disconnector can be collected separately using a voltage sensor. Regarding how to calculate the voltage difference across the dual-channel disconnector, please refer to the description of step S403 above, which will not be repeated here.

[0249] Optionally, if the voltage difference across the dual-channel disconnector is not equal to -ΔV, then the dual-channel disconnector is determined to be faulty. If the voltage difference across the dual-channel disconnector is equal to -ΔV, then the dual-channel disconnector is determined to be fault-free.

[0250] Optionally, if the voltage difference across the dual-channel disconnector is not equal to ΔV, the faulty component can be determined based on the value of ΔV and the structure of the dual-channel disconnector. The specific determination process can be found in step S506 above, and will not be repeated here.

[0251] Optionally, if the judgment result of step S704 is "yes" and the judgment result of step S706 is "no", based on the value of ΔV and the structure of the dual-channel disconnector, it can be further determined that the dual-channel disconnector includes one faulty disconnector and one fault-free disconnector. The specific judgment process can be referred to the description of step S506 above, and will not be repeated here.

[0252] Optionally, if the judgment result of step S704 is "no" and the judgment result of step S706 is "yes", based on the value of ΔV and the structure of the dual-channel disconnector, it can be further determined that the dual-channel disconnector includes one faulty disconnector and one fault-free disconnector. For the specific judgment process, please refer to the description of step S506 above, which will not be repeated here.

[0253] Optionally, steps S705 and S706 are executed cyclically to obtain the voltage difference across multiple dual-channel disconnecting devices, thereby more accurately determining whether the voltage difference across the dual-channel disconnecting devices is equal to -ΔV, and thus more accurately identifying whether a fault exists in the dual-channel disconnecting devices. This application does not limit the number of times steps S705 and S706 are executed cyclically. For example, they can be executed j times, where j is an integer greater than 1. For example, j could be 3, 5, or 7, etc.

[0254] Furthermore, this application also provides fault detection methods as shown in Figures 8 and 9. It is understood that the fault detection methods shown in Figures 8 and 9 can be considered reasonable variations or supplements to the embodiments in Figures 5 or 7 above; or, it is understood that the fault detection methods in the embodiments of this application can also be considered embodiments that can be executed independently, and this application does not impose any limitations on them.

[0255] The fault detection method shown in Figure 8 may include one or more steps from S801 to S806. It should be understood that, for ease of description, the method is described in the order of steps S801 to S806, and is not intended to limit the execution to this order. This application embodiment does not limit the order of execution, execution time, or number of executions of the above one or more steps. Steps S801 to S806 are as follows:

[0256] Step S801: Control the dual-channel isolating switch device to disconnect.

[0257] Step S802: Obtain the first voltage V1 output by the first power supply.

[0258] Step S803: Control the second power supply to output the second voltage V2, V2 = V1 + ΔV.

[0259] Step S804: The voltage difference across the dual-channel disconnector is equal to ΔV.

[0260] Step S805: Control the second power supply to output the second voltage V3, V3 = V1 - ΔV.

[0261] Step S806: Determine whether the voltage difference across the dual-channel disconnector is equal to -ΔV. If the voltage difference across the dual-channel disconnector is equal to -ΔV, the dual-channel disconnector is fault-free. If the voltage difference across the dual-channel disconnector is not equal to -ΔV, one of the disconnector devices is faulty.

[0262] The specific implementation of the above steps can be referred to the description of the corresponding steps in Figure 7 above. The difference between Figure 8 and Figure 7 is that in step S704, it is necessary to determine whether the voltage difference across the dual-channel disconnector device is equal to ΔV, while in step S804, the voltage difference across the dual-channel disconnector device is equal to ΔV.

[0263] The fault detection method shown in Figure 9 may include one or more steps from S901 to S906. It should be understood that, for ease of description, the method is described in the order of steps S901 to S906, and is not intended to limit the execution to this order. This application embodiment does not limit the order of execution, execution time, or number of executions of the above one or more steps. Steps S901 to S906 are as follows:

[0264] Step S901: Control the dual-channel isolating switch device to disconnect.

[0265] Step S902: Obtain the first voltage V1 output by the first power supply.

[0266] Step S903: Control the second power supply to output the second voltage V2, V2 = V1 + ΔV.

[0267] Step S904: Determine whether the voltage difference across the dual-channel disconnector is equal to ΔV. If the voltage difference across the dual-channel disconnector is not equal to ΔV, one of the disconnector devices is faulty.

[0268] Step S905: Control the second power supply to output the second voltage V3, V3 = V1 - ΔV.

[0269] Step S906: The voltage difference across the dual-channel disconnector is equal to -ΔV. In this case, the dual-channel disconnector is fault-free.

[0270] The specific implementation of the above steps can be referred to the description of the corresponding steps in Figure 7 above. The difference between Figure 9 and Figure 7 is that in step S706, it is necessary to determine whether the voltage difference across the dual-channel disconnector is equal to -ΔV, while in step S904, the voltage difference across the dual-channel disconnector is equal to -ΔV.

[0271] In this embodiment, by controlling the dual-path disconnector to be in the open state and acquiring the voltage difference across the dual-path disconnector under both boost and buck conditions of the second power supply, the system analyzes the voltage difference to determine if the dual-path disconnector is faulty. It is evident that this embodiment has a simple and effective judgment logic, and can promptly and accurately determine whether the dual-path disconnector is faulty, even identifying which of the two disconnectors is faulty. This allows for timely detection of faults within the redundant power supply system itself, enabling timely fault handling to ensure the safety of the load's power supply.

[0272] This application also provides a fault detection device, which includes a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program, so that the device performs the fault detection method described in FIG4, FIG5, FIG7, FIG8 or FIG9.

[0273] Optionally, the aforementioned fault detection device is a DC-DC converter.

[0274] This application also provides a redundant power supply system 100, which includes a dual-path disconnector and the aforementioned fault detection device. The fault detection device is used to detect whether a fault exists in the dual-path disconnector, and it is used to execute the fault detection method described in Figures 4, 5, 7, 8, or 9.

[0275] This application also provides a terminal device, which includes the above-mentioned fault detection device or redundant power supply system 100.

[0276] Optionally, the terminal can be a vehicle, drone, robot, or other intelligent terminal or transportation tool; alternatively, the terminal can also be industrial equipment. It should be understood that the terminal involved in this application can include intelligent terminals or transportation tools such as vehicles, robots, drones, ships, and vessels. Here, "vehicle" is a vehicle in a broad sense, and can be transportation tools (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), etc. For example, a robot can be an automated guided vehicle (AGV), a walking conversational robot, a service robot, etc. Industrial equipment includes industrial robots, robotic arms, etc. Leisure and entertainment equipment includes virtual reality (VR) devices, mixed reality (MR) devices, or 4D cinema cabins, etc.

[0277] This application provides a computer program product comprising: a computer program (also referred to as code or instructions); when the computer program is run, it causes the computer to execute the fault detection method described in Figures 4, 5, 7, 8 or 9.

[0278] This application provides a chip including a processor, which is used to execute instructions. When the processor executes the instructions, the chip performs the fault detection method described in Figures 4, 5, 7, 8, or 9.

[0279] This application also provides a computer-readable storage medium storing instructions that, when executed on at least one processor, implement the fault detection method described in Figures 4, 5, 7, 8, or 9.

[0280] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

Claims

1. A fault detection method, characterized in that, The method is applied to a redundant power supply system, which includes a first power supply, a second power supply, a dual-channel disconnector, and a controller. The output terminals of the first and second power supplies are respectively connected to a first terminal and a second terminal of the dual-channel disconnector. The output terminal of the first power supply is also connected to a first load, and the output terminal of the second power supply is also connected to a second load. The method includes performing the following operations through the controller: The dual-channel disconnect switch is controlled to be in the open state; A first voltage difference is established between the first voltage output by the first power supply and the second voltage output by the second power supply, and the first electrical parameters of the dual-channel disconnector are obtained; the first electrical parameters include the second voltage difference between the first and second terminals of the dual-channel disconnector or the first current intensity on the dual-channel disconnector. The fault status of the dual-channel disconnector is determined based on the first electrical parameter.

2. The method according to claim 1, characterized in that, The method further includes performing the following operations via the controller: A third voltage difference is established between the third voltage output by the first power supply and the fourth voltage output by the second power supply, and the second electrical parameters of the dual-channel disconnect switch device are obtained; the second electrical parameters include the fourth voltage difference between the first and second terminals of the dual-channel disconnect switch device or the second current intensity on the dual-channel disconnect switch device. Determining the fault status of the dual-channel disconnector based on the first electrical parameter includes: The fault status of the dual-channel disconnector is determined based on the first electrical parameter and the second electrical parameter; Wherein, the first voltage difference is less than 0 and the third voltage difference is greater than 0, or the first voltage difference is greater than 0 and the third voltage difference is less than 0.

3. The method according to claim 2, characterized in that, The first electrical parameter is the second voltage difference, and the second electrical parameter is the fourth voltage difference; The method of determining the fault status of the dual-channel disconnector based on the first electrical parameter and the second electrical parameter includes: The fault status of the dual-channel disconnector is determined based on the first voltage difference, the second voltage difference, the third voltage difference, and the fourth voltage difference.

4. The method according to claim 2 or 3, characterized in that, After the control dual-channel isolating switch is in the open state, the method further includes performing the following operation through the controller: acquiring the voltage output by the second power supply to obtain the second voltage or the fourth voltage; The adjustment of the first voltage output by the first power supply to have a first voltage difference with the second voltage output by the second power supply includes: Adjust the first voltage output by the first power supply to be equal to the voltage obtained by adding the difference between the second voltage and the first voltage; The adjustment of the third voltage output by the first power supply to have a third voltage difference with the fourth voltage output by the second power supply includes: The third voltage output by the first power supply is adjusted to be equal to the voltage obtained by adding the difference between the fourth voltage and the third voltage.

5. The method according to claim 3 or 4, characterized in that, The dual-channel disconnector is fault-free when the difference between the first voltage difference and the second voltage difference is less than or equal to the first threshold, and the difference between the third voltage difference and the fourth voltage difference is less than or equal to the first threshold. The dual-channel disconnector is faulty if the difference between the first voltage difference and the second voltage difference is greater than the first threshold, and / or if the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold.

6. The method according to any one of claims 3-5, characterized in that, The dual-channel disconnector includes a first switch and a second switch, wherein the source of the first switch is connected to the source of the second switch. If the difference between the first voltage difference and the second voltage difference is greater than the first threshold, the first switching device is faulty. If the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold, the second switching device is faulty.

7. The method according to claim 6, characterized in that, If the difference between the first voltage difference and the second voltage difference is greater than the first threshold, and the difference between the third voltage difference and the fourth voltage difference is less than or equal to the first threshold, then the first switching device is faulty, and the second switching device is not faulty. If the difference between the first voltage difference and the second voltage difference is less than or equal to the first threshold, and the difference between the third voltage difference and the fourth voltage difference is greater than the first threshold, then the first switching device is fault-free, and the second switching device is faulty.

8. The method according to any one of claims 2-7, characterized in that, The first voltage difference and / or the third voltage difference are greater than the second threshold.

9. The method according to claim 2, characterized in that, The first electrical parameter is the first current intensity on the dual-channel disconnector device, and the second electrical parameter is the second current intensity on the dual-channel disconnector device; When both the first current intensity and the second current intensity are zero, the dual-channel disconnect switch device is fault-free; The dual-channel disconnector is faulty if the first current intensity and / or the second current intensity are not zero.

10. The method according to any one of claims 2-9, characterized in that, The output voltage of the first power supply is adjustable and / or the output voltage of the second power supply is adjustable.

11. The method according to claim 10, characterized in that, When the output voltage of the first power supply is adjustable, the second voltage is equal to the fourth voltage.

12. The method according to any one of claims 2-11, characterized in that, The first voltage difference is equal to the third voltage difference.

13. A fault detection device, characterized in that, include: processor; The processor is used to perform the method according to any one of claims 1 to 12.

14. The fault detection device according to claim 13, characterized in that, The fault detection device is a DC-DC converter (DCDC).

15. A redundant power supply system, characterized in that, The redundant power supply system includes dual-path isolation switching devices and a fault detection device; The fault detection device is used to detect whether the dual-channel disconnector is faulty; the fault detection device includes the fault detection device according to claim 13 or 14.

16. A terminal device, characterized in that, The terminal device includes the fault detection device as described in claim 13 or 14, or the redundant power supply system as described in claim 15.

17. A vehicle end, characterized in that, The vehicle end includes the fault detection device as described in claim 13 or 14, or the redundant power supply system as described in claim 15, or the terminal device as described in claim 16.

18. A computer-readable storage medium, characterized in that, include: The computer-readable storage medium is used to store instructions or computer programs that, when executed, cause the method as described in any one of claims 1 to 12 to be implemented.

19. A computer program product, characterized in that, include: Instructions or computer programs; When the instructions or the computer program are executed, the method as described in any one of claims 1 to 12 is implemented.

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