Fault detection system and vehicle

Abstract

The utility model provides a fault detection system and a vehicle, and relates to the technical field of vehicles, the system is applied to a high-voltage interlocking loop with N detection connectors, the N detection connectors are sequentially connected in series, N is larger than or equal to 2, the system comprises a first control module and N second control modules, each second control module is connected with one detection connector, and the first control module is connected with the detection connectors. The first control module is connected with the first detection connector and the last detection connector in the N detection connectors, and under the condition that the first control module detects that one detection connector in the N detection connectors fails, the first control module controls the N second control modules to conduct signal interaction with the detection connectors connected with the second control modules respectively. And judging whether the detection connectors respectively connected with the N second control modules fail or not, and reporting the judging result to the first control module. According to the invention, whether the high-voltage interlocking loop fails or not can be detected, and the fault source can be accurately positioned under the condition that the high-voltage interlocking loop fails.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and more particularly, to a fault detection system and a vehicle in the technical field of vehicles. BACKGROUND

[0002] With the development of new energy vehicles, electric vehicles gradually become a trend. High-voltage electrical systems are usually configured in electric vehicles, which are used to supply power to high-power electrical equipment (such as motors) in vehicles. In order to detect the working state of the high-voltage electrical system in real time, a high-voltage interlock (HVIL) system is usually provided in the vehicle. The high-voltage interlock system is provided with a plurality of high-voltage connectors and corresponding low-voltage detection connectors. Each high-voltage connector usually has an interlock contact. These contacts are connected by wires to form a complete high-voltage interlock loop. The high-voltage interlock system can cut off the high-voltage power supply in time when the high-voltage electrical system is abnormal, thereby preventing electric shock accidents and fire risks.

[0003] The high-voltage interlock system in the related art is usually provided with a high-voltage interlock detection circuit and a control system. Once the high-voltage interlock detection circuit detects that the high-voltage interlock loop is disconnected, it will immediately send a signal to the control system to cut off the high-voltage output of all loads to ensure safety. However, the high-voltage interlock detection circuit in the related art cannot accurately detect the specific position of the disconnection of the high-voltage interlock loop, resulting in low efficiency in troubleshooting the high-voltage interlock system. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a fault detection system and a vehicle. The embodiments of the present application can not only detect whether the high-voltage interlock loop has a fault, but also accurately locate the specific position of the fault when the high-voltage interlock loop has a fault.

[0005] In a first aspect, a fault detection system is provided for a high-voltage interlocking loop having a plurality of detection connectors, each detection connector having a first input port and a first output port, the plurality of detection connectors being connected in series, the fault detection system comprising: a first control module and a plurality of second control modules, each of the first control module and the second control modules having a second communication port, a second input port and a second output port; for each second control module, the second control module corresponding to one detection connector, the second output port of the second control module being electrically connected to the first input port of the corresponding detection connector, and the second input port of the second control module being electrically connected to the first output port of the corresponding detection connector; the second communication port of the first control module being electrically connected to the second communication port of each of the plurality of second control modules, the second output port of the first control module being electrically connected to the first input port of a first detection connector in the plurality of detection connectors, and the second input port of the first control module being electrically connected to the first output port of a last detection connector in the plurality of detection connectors; wherein, in a case where the first control module outputs a first detection signal from the second output port of the first control module and the first control module does not receive the first detection signal from the second input port of the first control module, the first control module sends a fault detection signal to the second communication port of each of the plurality of second control modules; for each second control module, in a case where the second control module receives the fault detection signal, the second control module outputs a second detection signal from the second output port of the second control module, and determines whether the detection connector connected to the second control module is faulty according to whether the second control module receives the second detection signal from the second input port of the second control module, and sends the determination result to the second communication port of the first control module.

[0006] Based on the above technical solution, the fault detection system provided by the embodiments of the present application can not only detect whether the high-voltage interlocking loop is faulty, but also accurately locate the fault source in a case where the high-voltage interlocking loop is faulty.

[0007] In a possible implementation, the first control module is any one of the plurality of second control modules, and the second communication port of the first control module is electrically connected to the second communication port of each of the plurality of second control modules except the first control module.

[0008] By controlling all the second control modules through one of the second control modules included in the fault detection system, the hardware resources of the second control modules are multiplexed, which is conducive to reducing the hardware design cost of the fault detection system.

[0009] In a possible implementation manner, the second input port of the first control module includes a first sub-input port and a second sub-input port, and the second output port of the first control module includes a first sub-output port and a second sub-output port; the first sub-output port is electrically connected with the first input port of the first detection connector, the first sub-input port is electrically connected with the first output port of the last detection connector, the second sub-output port is electrically connected with the first input port of the detection connector corresponding to the first control module, and the second sub-input port is electrically connected with the first input port of the detection connector corresponding to the first control module; in a case where the first control module outputs the first detection signal through the first sub-output port and the first sub-input port does not receive the first detection signal, the first control module sends a fault detection signal to the second communication port of the plurality of second control modules through the second communication port of the first control module; in a case where the first control module receives the fault detection signal, the first control module outputs the second detection signal through the second sub-output port, and judges whether the detection connector connected with the first control module is faulty according to whether the second sub-input port receives the second detection signal, and sends the judgment result to the first control module.

[0010] By setting the first input port of the first control module to include the first sub-input port and the second sub-input port, and setting the first output port of the first control module to include the first sub-output port and the second sub-output port, the first control module is used to separately output and receive the detection signals of the detection loop formed by the first control module and the N detection connectors and the detection loop formed by the first control module and the corresponding detection connector, when any one of the first sub-input port and the first sub-output port is faulty, the detection loop formed by the first control module and the N detection connectors can still be detected for fault, when any one of the second sub-input port and the second sub-output port is faulty, the detection loop formed by the first control module and the corresponding detection connector can still be detected for fault, and the reliability of detecting whether the detection loop is faulty is improved.

[0011] In a possible implementation manner, the first sub-output port is electrically connected with the first output port of the first detection connector through a switch module.

[0012] In a possible implementation manner, the first control module comprises a first sub-control module and a second sub-control module, the second communication ports of the first sub-control module are electrically connected with the second communication ports of the second sub-control module and the other second control modules respectively, the second output port of the first sub-control module is electrically connected with the first input port of the first detection connector, and the second input port of the first sub-control module is electrically connected with the first output port of the last detection connector; in a case where the first sub-control module outputs the first detection signal through the second output port of the first sub-control module and the second input port of the first sub-control module does not receive the first detection signal, the second communication ports of the first sub-control module send a fault detection signal to the second communication ports of the second sub-control module and the other second control modules.

[0013] By setting that the first control module comprises the first sub-control module and the second sub-control module, the fault detection of the global detection loop formed by the first sub-control module and the plurality of detection connectors is separated from the fault detection of the local detection loop formed by each of the second control modules and the corresponding detection connector, and the fault detection control of the global detection loop and the local detection loop is performed by independent second control modules, which is beneficial to improve the reliability of the fault detection of the global detection loop and the local detection loop.

[0014] In a possible implementation manner, the first sub-control module is a control chip of a vehicle controller or a battery management system, which is beneficial to improve the flexibility of selection of the first sub-control module.

[0015] In a possible implementation manner, in a case where the first sub-control module sends the fault detection signal to the second communication ports of the second sub-control module and the other second control modules through the second communication ports of the first sub-control module, the second input port and the second output port of the first sub-control module are disabled to control the second input port and the second output port of the first sub-control module to be closed, which is beneficial to reduce the energy consumption of the first sub-control module.

[0016] In a possible implementation manner, the third communication port of the first sub-control module is electrically connected with a fault reminding device; for each of the second sub-control module and the other second control modules, the first sub-control module sends the judgment result sent by the control module to the fault reminding device through the third communication port in a case where the first sub-control module receives the judgment result, and the control module sends the judgment result to the fault reminding device through a fourth communication port.

[0017] In a possible implementation manner, the second input port of the first control module is electrically connected with the first output port of the last detection connector through the switch module.

[0018] In a second aspect, a vehicle is provided, which comprises a high-voltage interlock loop and the above-mentioned fault detection system, the high-voltage interlock loop is provided with a plurality of detection connectors, and the fault detection system is electrically connected with the plurality of detection connectors.

[0019] Based on the above technical solution, the vehicle can not only detect whether the high-voltage interlock loop is faulty, but also accurately locate the fault source when the high-voltage interlock loop is faulty. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0021] Figure 1 An exemplary circuit schematic diagram of a fault detection system provided by the present application is shown;

[0022] Figure 2 Another exemplary circuit schematic diagram of a fault detection system provided by the present application is shown;

[0023] Figure 3 Still another exemplary circuit schematic diagram of a fault detection system provided by the present application is shown;

[0024] Figure 4 Still another exemplary circuit schematic diagram of a fault detection system provided by the present application is shown;

[0025] Figure 5 An exemplary schematic diagram of a vehicle provided by the present application is shown. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0030] With the development of new energy vehicles, electric vehicles gradually become a trend, and high-voltage electrical systems are usually configured in electric vehicles. The high-voltage electrical system is used to supply power to high-power electrical equipment (such as motors) in the vehicle. In order to detect the working state of the high-voltage electrical system in real time, a high-voltage interlocking system is usually provided in the vehicle. The high-voltage interlocking system is provided with a plurality of high-voltage connectors and corresponding low-voltage detection connectors. Each high-voltage connector usually has an interlocking contact. These contacts are connected by wires to form a complete high-voltage interlocking loop. The high-voltage interlocking system can cut off the high-voltage power supply in time when the high-voltage electrical system is abnormal, thereby preventing electric shock accidents and fire risks.

[0031] The high-voltage interlocking detection circuit in the related art cannot accurately detect the specific position of the disconnection of the high-voltage interlocking loop, resulting in low efficiency of troubleshooting of the high-voltage interlocking system.

[0032] Based on the problems in the prior art, the embodiment of the present application provides a fault detection system and a vehicle. The embodiment of the present application can not only detect whether the high-voltage interlocking loop has a fault, but also accurately locate the specific position of the fault when the high-voltage interlocking loop has a fault.

[0033] The following is an exemplary embodiment of a fault detection system provided by the present application.

[0034] Figure 1 An exemplary circuit schematic diagram of a fault detection system provided by the present application is shown as follows. Figure 1 As shown in the figure, a fault detection system 100 provided by the present application is applied to a high-voltage interlocking loop 200 having N detection connectors, N≥2. Each detection connector has a first input port and a first output port, Figure 1 The N detection connectors in the figure are a first detection connector CON-1, a second detection connector CON-2,..., and an Nth detection connector CON-N, port 1 represents the first input port of the detection connector, port 2 represents the first output port of the detection connector, and the detection connector is specifically a low-voltage detection connector. The low-voltage detection connector is installed on a high-voltage connector and is used to connect a high-voltage component. When the low-voltage detection connector is normal, an electrical signal (for example, a PWM wave signal) is transmitted through the low-voltage detection connector to form a complete loop.

[0035] The fault detection system 100 provided by the present application includes N second control modules and a first control module, N≥2. The first control module and each second control module have a second communication port, a second input port, and a second output port, Figure 1 In the figure, MCU-Z represents the first control module, the N second control modules are a first second control module MCU-1, a second second control module MCU-2,..., and an Nth second control module MCU-N, port PC represents the second communication port of the first control module, port OUT represents the second output port of the second control module, and port IN represents the second input port of the second control module.

[0036] The first control module is a master control module, and the N second control modules are slave control modules. The master control module can control the slave control modules.

[0037] The N detection connectors are connected in series, specifically, the first output port of a former detection connector in two adjacent detection connectors is electrically connected with the first input port of a latter detection connector, for example, the first output port of the first detection connector is electrically connected with the first input port of the second detection connector, the first output port of the second detection connector is electrically connected with the first input port of the third detection connector, and so on, the first output port of the N-1th detection connector is electrically connected with the first input port of the Nth detection connector.

[0038] The second communication port of the first control module is electrically connected with the second communication port of the N second control modules respectively, the second output port of the first control module is electrically connected with the first input port of the first detection connector (the first detection connector) in the N detection connectors, and the second input port of the first control module is electrically connected with the first output port of the Nth detection connector (the last detection connector) in the N detection connectors, specifically, the second input port of the first control module is electrically connected with the first output port of the Nth detection connector through the switch module K1, and the switch module K1 is a switch circuit composed of a relay or a switch tube.

[0039] For each of the N second control modules MCUi, the second control module MCUi corresponds to a detection connector, the second output port of the second control module MCUi is electrically connected with the first input port of the detection connector corresponding to the second control module MCUi, and the second input port of the second control module MCUi is electrically connected with the first output port of the detection connector corresponding to the second control module MCUi. For example, the first second control module corresponds to the first detection connector, the second second control module corresponds to the second detection connector, and so on, the Nth second control module corresponds to the Nth detection connector, then the second output port of the first second control module is electrically connected with the first input port of the first detection connector, the second input port of the first second control module is electrically connected with the first output port of the first detection connector, and so on, the second output port of the Nth second control module is electrically connected with the first input port of the Nth detection connector, and the second input port of the Nth second control module is electrically connected with the first output port of the Nth detection connector.

[0040] Based on Figure 1The circuit connection relationship in the first control module and the N detection connectors, so the fault detection system comprises a first loop and N second loops, wherein the first loop is a loop formed by the first control module and the N detection connectors, and the specific connection is: the second output port of the first control module-the first input port of the first detection connector-the first output port of the first detection connector-the first input port of the second detection connector-the first output port of the second detection connector-...-the first input port of the Nth detection connector-the first output port of the Nth detection connector-the second input port of the first control module.

[0041] Based on Figure 1 The circuit connection relationship in the first control module and the N detection connectors, so the fault detection system comprises a first loop and N second loops, wherein the first loop is a loop formed by the first control module and the N detection connectors, and the specific connection is: the second output port of the first control module-the first input port of the first detection connector-the first output port of the first detection connector-the first input port of the second detection connector-the first output port of the second detection connector-...-the first input port of the Nth detection connector-the first output port of the Nth detection connector-the second input port of the first control module.

[0042] When it is needed to determine whether there is a fault in the N detection connectors, it is needed to detect whether the first loop is conductive, if it is detected that the first loop is not conductive, it indicates that there is a fault in the N detection connectors, and then it is needed to detect whether each second loop in the N second loops is conductive, and the fault detection connector is located by judging whether each second loop is conductive, that is, the fault source is obtained.

[0043] The process of detecting whether the first loop is conductive is that the first control module outputs a first detection signal from the second output port of the first control module, and the first detection signal is, for example, any one of a high-level signal, a low-level signal and a PWM wave signal, if the N detection connectors are all not faulty, the second input port of the first control module can receive the first detection signal, that is, after the first control module outputs the first detection signal from the second output port, the first detection signal will pass through the N detection connectors in turn, and finally reach the second input port of the first control module, if the second input port of the first control module receives the first detection signal, it is determined that the first loop is conductive, and the N detection connectors are all not faulty. If the second input port of the first control module does not receive the first detection signal, it indicates that at least one of the N detection connectors is faulty, which causes the first detection signal to be unable to flow to the second input port of the first control module, and it is determined that the first loop is not conductive.

[0044] In a case where the first control module outputs the first detection signal from the second output port of the first control module and the first control module does not receive the first detection signal from the second input port of the first control module, the second communication port of the first control module sends a fault detection signal to the second communication ports of the N second control modules, that is, in a case where the first control module determines that the first loop is not turned on, the second communication port of the first control module sends the fault detection signal to the second communication ports of the N second control modules to inform each second control module MCUi to detect whether the corresponding second loop is turned on.

[0045] For each second control module MCUi, in a case where the second control module MCUi receives the fault detection signal, the second output port of the second control module MCUi outputs the second detection signal, and according to whether the second input port of the second control module MCUi receives the second detection signal, the second control module MCUi determines whether the detection connector connected to the second control module MCUi is faulty, and sends the determination result to the second communication port of the first control module. The determination result includes that the detection connector connected to the second control module MCUi is faulty or not.

[0046] For example, the first second control module detects whether the corresponding second loop is turned on, including that the second output port of the first second control module outputs the second detection signal. If the second input port of the first second control module receives the second detection signal, it indicates that the second loop corresponding to the first second control module is turned on, and the first detection connector is not faulty. The determination result including that the first detection connector is not faulty is sent to the second communication port of the first control module through the second communication port of the first second control module, and then sent to the first control module. If the second input port of the first second control module does not receive the second detection signal, it indicates that the second loop corresponding to the first second control module is not turned on, and the first detection connector is faulty. The determination result including that the first detection connector is faulty is sent to the second communication port of the first control module through the second communication port of the first second control module, and then sent to the first control module, so as to realize accurate positioning of the faulty detection connector.

[0047] The first control module controls the switch module K1 to be closed, and controls the second output ports of the N second control modules to not output signals and the second input ports of the N second control modules to not receive signals when detecting whether the first loop is conductive.

[0048] After the first control module receives the judgment results sent by the N second control modules, the N judgment results are obtained and reported. The user can clearly see whether the N detection connectors have faults through the reported results. If a detection connector in the N detection connectors has a fault, the user can directly and intuitively see which detection connector has the fault.

[0049] The fault detection system provided in the embodiments of the present application can not only detect whether the high-voltage interlocking loop has a fault, but also accurately locate the fault source when the high-voltage interlocking loop has a fault.

[0050] In a possible implementation manner, the first control module can be a control module independent of the N second control modules, that is, the fault detection system includes N+1 control modules in total; or any one of the plurality of second control modules can be used as the first control module to implement multiplexing of the control modules, that is, the fault detection system includes N control modules in total, and the first control module is any one of the plurality of second control modules.

[0051] In the case where the first control module is any one of the N second control modules, the second communication ports of the first control module are respectively electrically connected to the second communication ports of the other second control modules except the first control module in the N second control modules, that is, the second communication ports of the first control module are respectively electrically connected to the second communication ports of the N-1 second control modules, and the N-1 second control modules do not include the second control module as the first control module. Figure 2 Figure 2 ​Another exemplary circuit schematic of a fault detection system provided by the present application is shown, the second control module MCU-1 is the first control module, when the second control module MCU-1 is the first control module, the second control module MCU-1 is both the master control module and the slave control module, the second control module MCU-2 to the second control module MCU-N are all slave control modules, and the master control module can control the slave control modules.

[0052] In the case where the first control module is any one of the N second control modules, the detection process of the first loop and the N second loops based on the circuit connection relationship in Figure 2 The detection process of the first loop and the N second loops based on the circuit connection relationship in Figure 1 The detection process of the first loop and the N second loops based on the circuit connection relationship in

[0053] The second control module in the plurality of second control modules included in the fault detection system controls all the second control modules, which realizes the reuse of the hardware resources of the second control modules and is conducive to reducing the hardware design cost of the fault detection system.

[0054] In a possible implementation manner, the first input port of the first control module includes a first sub-input port and a second sub-input port, and the first output port of the first control module includes a first sub-output port and a second sub-output port. The first sub-output port is electrically connected with the first input port of the first detection connector, the first sub-input port is electrically connected with the first output port of the Nth detection connector, the second sub-output port is electrically connected with the first input port of the detection connector corresponding to the first control module, and the second sub-input port is electrically connected with the first input port of the detection connector corresponding to the first control module.

[0055] In the case where the first control module outputs the first detection signal from the first sub-output port and the first sub-input port does not receive the first detection signal, the fault detection signal is sent from the second communication port of the first control module to the second communication port of the N second control modules; in the case where the first control module receives the fault detection signal, the second control module outputs the second detection signal from the second sub-output port, and according to whether the second sub-input port receives the second detection signal, it is judged whether the detection connector connected with the first control module is faulty, and the judgment result is sent to the first control module.

[0056] Figure 3 Another exemplary circuit schematic of a fault detection system provided by the present application is shown, the second control module MCU-1 is the first control module, when the second control module MCU-1 is the first control module, the second control module MCU-1 is both the master control module and the slave control module, the second control module MCU-2 to the second control module MCU-N are all slave control modules, and the master control module can control the slave control modules. Figure 3As shown, the first control module is the first second control module MCU-1. The first second control module is both the master control module and the slave control module. The second second control module MCU-2 to the Nth second control module MCU-N are all slave control modules. The first second control module MCU-1 can perform relevant control on the second second control module MCU-2 to the Nth second control module MCU-N.

[0057] like Figure 3 As shown, when the first control module is the first second control module MCU-1, the first input port of the first second control module MCU-1 includes a first sub-input port IN1 and a second sub-input port IN2, and the first output port includes a first sub-output port OUT1 and a second sub-output port OUT2. The first sub-output port OUT1 is electrically connected to the first input port of the first detection connector CON-1, the first sub-input port IN1 is electrically connected to the first output port of the Nth detection connector CON-N, the second sub-output port OUT2 is electrically connected to the first input port of the first detection connector CON-1, and the second sub-input port IN2 is electrically connected to the first input port of the first detection connector CON-1. Specifically, the first sub-output port OUT1 is electrically connected to the first input port of the first detection connector CON-1 through a switch module K2, which is a switch circuit composed of a relay or a switching transistor.

[0058] based on Figure 3 The connection relationship, when the first control module is the first second control module MCU-1, is as follows: the first sub-output port OUT1 of the first second control module MCU-1 - the first input port of the first detection connector - the first output port of the first detection connector - the first input port of the second detection connector - the first output port of the second detection connector - ... - the first input port of the Nth detection connector - the first output port of the Nth detection connector - the first sub-input port IN1 of the first second control module MCU-1.

[0059] The specific connection of the first second loop formed by the first second control module MCU-1 and the first detection connector is as follows: the second sub-output port OUT2 of the first second control module MCU-1 - the first input port of the first detection connector - the first output port of the first detection connector - the second sub-input port IN2 of the first second control module MCU-1. Figure 3 The specific connections of the other second circuits remain unchanged, and are consistent with... Figure 1 Maintain consistency.

[0060] In the case that the first control module is the first second control module MCU-1, the process of detecting whether the first loop is on or not is as follows: the first second control module MCU-1 outputs a first detection signal from the first sub-output port OUT1, if none of the N detection connectors fails, the first sub-input port IN1 of the first second control module MCU-1 can receive the first detection signal, that is, after the first sub-output port OUT1 outputs the first detection signal, the first detection signal will pass through the N detection connectors in turn and finally reach the first sub-input port IN1, if the first sub-input port IN1 receives the first detection signal, it is determined that the first loop is on and none of the N detection connectors fails. If the first sub-input port IN1 does not receive the first detection signal, it means that at least one of the N detection connectors fails, resulting in that the first detection signal cannot flow to the first sub-input port IN1 of the first second control module MCU-1, so it is determined that the first loop is not on.

[0061] In the case that the first second control module MCU-1 outputs the first detection signal from the first sub-output port OUT1 and the first sub-input port IN1 does not receive the first detection signal, the first second control module MCU-1 sends a fault detection signal to the second communication port of the N second control modules from the second communication port of the first second control module MCU-1, that is, the first second control module MCU-1 sends the fault detection signal to the second communication port of the N second control modules from the second communication port of the first second control module MCU-1 in the case that it is determined that the first loop is not on, so as to inform each second control module MCUi to detect whether the second loop corresponding thereto is on or not.

[0062] The detection of whether the second loop corresponding to the first second control module MCU-1 is on or not includes that the second sub-output port OUT2 outputs a second detection signal, if the second sub-input port IN2 receives the second detection signal, it means that the second loop corresponding to the first second control module is on and the first detection connector does not fail, the determination result including that the first detection connector does not fail is sent to the second communication port of the first second control module MCU-1 from the second communication port of the first second control module MCU-1, so as to be sent to the first second control module MCU-1; if the second sub-input port IN2 does not receive the second detection signal, it means that the second loop corresponding to the first second control module MCU-1 is not on and the first detection connector fails, the determination result including that the first detection connector fails is sent to the second communication port of the first second control module MCU-1 from the second communication port of the first second control module MCU-1, so as to be sent to the first second control module MCU-1, thereby realizing accurate positioning of the failed detection connector.

[0063] The first second control module to the Nth second control module each perform the on-off detection process on the corresponding second loop in the same way as the first second control module MCU-1 performs the on-off detection process on the corresponding second loop, and the present application will not be described again. When detecting whether the first loop is on, the first second control module MCU-1 controls the switch module K2 to be closed, controls the second output port of the N-1 second control modules to not output signals, and controls the second input port of the N-1 second control modules to not receive signals. When detecting whether each second loop is on, the first second control module MCU-1 controls the switch module K2 to be opened, controls the second output port of the N-1 second control modules to output signals, and controls the second input port of the N-1 second control modules to receive signals.

[0064] By setting the first input port of the first control module to include the first sub-input port and the second sub-input port, and the first output port of the first control module to include the first sub-output port and the second sub-output port, the detection signal of the detection loop composed of the first control module and the N detection connectors and the detection loop composed of the first control module and the corresponding detection connector can be output and received separately, when any one of the first sub-input port and the first sub-output port fails, the detection loop composed of the first control module and the N detection connectors can still be detected for failure, when any one of the second sub-input port and the second sub-output port fails, the detection loop composed of the first control module and the corresponding detection connector can still be detected for failure, which is conducive to improving the reliability of detecting whether the detection loop fails.

[0065] In a possible implementation manner, Figure 4 Another exemplary circuit schematic diagram of the fault detection system provided by the present application is shown, as shown in Figure 4As shown, in the case that the first control module is any one of the N second control modules, the first control module comprises a first sub-control module MCU-11 and a second sub-control module MCU-12, the second communication ports of the first sub-control module MCU-11 are respectively electrically connected with the second communication ports of the second sub-control module MCU-12 and the N-1 second control modules (MCU2-MCU-N), the second output port of the first sub-control module MCU-11 is electrically connected with the first input port of the first detection connector, and the second input port of the first sub-control module MCU-11 is electrically connected with the first output port of the Nth detection connector. Wherein, the first sub-control module MCU-11 is a master control module, the second sub-control module MCU-12 and the N-1 second control modules (MCU2-MCU-N) are all slave control modules, and the first sub-control module MCU-11 can control the second sub-control module MCU-12 and the N-1 second control modules.

[0066] In the case that the first sub-control module MCU-11 outputs the first detection signal through the second output port of the first sub-control module MCU-11 and the second input port of the first sub-control module MCU-11 does not receive the first detection signal, the second communication port of the first sub-control module MCU-11 sends a fault detection signal to the second communication ports of the second sub-control module MCU-12 and the N-1 second control modules.

[0067] Based on the circuit connection relationship in Figure 4 , the first loop is a loop composed of the first sub-control module MCU-11 and the N detection connectors, and the specific connection is: the second output port of the first sub-control module MCU-11-the first input port of the first detection connector-the first output port of the first detection connector-the first input port of the second detection connector-the first output port of the second detection connector-...-the first input port of the Nth detection connector-the first output port of the Nth detection connector-the second input port of the first sub-control module MCU-11.

[0068] Based on the circuit connection relationship in Figure 4 , the N second loops are respectively: the first second control module (the second sub-control module MCU-12) and the first detection connector constitute the first second loop, the second second control module and the second detection connector constitute the second second loop,..., the Nth second control module and the Nth detection connector constitute the first second loop. For example, the specific connection of the first second loop is: the second output port of the second sub-control module MCU-12-the first input port of the first detection connector-the first output port of the first detection connector-the second input port of the second sub-control module MCU-12.

[0069] When it is needed to determine whether a fault occurs in the N detection connectors, it is needed to detect whether the first loop is conductive. If it is detected that the first loop is not conductive, it indicates that a fault occurs in the N detection connectors, and then it is needed to detect whether each of the N second loops is conductive. The faulty detection connector is located by determining whether each of the second loops is conductive, that is, the source of the fault is obtained.

[0070] The process of detecting whether the first loop is conductive is as follows: the first sub-control module MCU-11 outputs the first detection signal from the second output port of the first sub-control module MCU-11. If the N detection connectors are all normal, the second input port of the first sub-control module MCU-11 can receive the first detection signal, that is, after the first sub-control module MCU-11 outputs the first detection signal from the second output port, the first detection signal will pass through the N detection connectors in turn and finally reach the second input port of the first sub-control module MCU-11. If the second input port of the first sub-control module MCU-11 receives the first detection signal, it is determined that the first loop is conductive and the N detection connectors are all normal. If the second input port of the first sub-control module MCU-11 does not receive the first detection signal, it indicates that at least one of the N detection connectors is faulty, which causes the first detection signal to fail to flow to the second input port of the first sub-control module MCU-11, and it is determined that the first loop is not conductive.

[0071] In the case that the first sub-control module MCU-11 outputs the first detection signal from the second output port of the first sub-control module MCU-11 and the second input port of the first sub-control module MCU-11 does not receive the first detection signal, the second communication port of the first sub-control module MCU-11 sends a fault detection signal to the second communication ports of the N second control modules, that is, the first sub-control module MCU-11 sends the fault detection signal to the second communication ports of the second sub-control module MCU-12 and the N-1 second control modules from the second communication port of the first sub-control module MCU-11 in the case that it is determined that the first loop is not conductive, so as to inform each second control module MCUi to detect whether the corresponding second loop is conductive. In the case that the first control module is any one of the N second control modules, the N-1 second control modules can be understood as the other second control modules except the first control module among the N second control modules.

[0072] For each second control module MCUi, the second control module MCUi outputs a second detection signal from a second output port of the second control module MCUi in a case that a fault detection signal is received, and judges whether a detection connector connected to the second control module MCUi is faulty according to whether the second detection signal is received by a second input port of the second control module MCUi, and sends a judgment result to a second communication port of the first sub-control module MCU-11, the judgment result including that the detection connector connected to the second control module MCUi is faulty or not.

[0073] For example, the second sub-control module MCU-12 judges whether the second loop corresponding to the second sub-control module MCU-12 is conductive or not, including that the second sub-control module MCU-12 outputs a second detection signal from a second output port of the second sub-control module MCU-12, if the second detection signal is received by a second input port of the second sub-control module MCU-12, it indicates that the second loop corresponding to the second sub-control module MCU-12 is conductive, and the first detection connector is not faulty, and a judgment result including that the first detection connector is not faulty is sent to the second communication port of the first sub-control module MCU-11 through the second communication port of the second sub-control module MCU-12, so as to be sent to the first sub-control module MCU-11; if the second detection signal is not received by the second input port of the second sub-control module MCU-12, it indicates that the second loop corresponding to the second sub-control module MCU-12 is not conductive, and the first detection connector is faulty, and a judgment result including that the first detection connector is faulty is sent to the second communication port of the first sub-control module MCU-11 through the second communication port of the second sub-control module MCU-12, so as to be sent to the first sub-control module MCU-11, thereby realizing accurate positioning of the faulty detection connector.

[0074] The process of whether the second loop corresponding to the second sub-control module MCU-12 is conductive or not is the same as the process of whether the second loop corresponding to the second control module MCUi is conductive or not, and the application will not be described again. When detecting whether the first loop is conductive or not, the first sub-control module MCU-11 controls the second output port of the second sub-control module MCU-12 and N-1 second control modules not to output signals, and controls the second input port of the second sub-control module MCU-12 and N-1 second control modules not to receive signals. When detecting whether each second loop is conductive or not, the first sub-control module MCU-11 controls the second output port of the second sub-control module MCU-12 and N-1 second control modules to output signals, and controls the second input port of the second sub-control module MCU-12 and N-1 second control modules to receive signals.

[0075] After the first sub-control module MCU-11 receives the judgment results sent by the second sub-control module MCU-12 and the N-1 second control modules, N judgment results are obtained, and the N judgment results are reported. Through the reported results, the user can clearly see whether the N detection connectors fail. If a detection connector fails in the N detection connectors, the user can directly see which detection connector fails.

[0076] By setting the first control module to include the first sub-control module MCU-11 and the second sub-control module MCU-12, the fault detection of the global detection loop formed by the first sub-control module MCU-11 and the N detection connectors is separated from the fault detection of the local detection loop formed by each of the N second control modules and the corresponding detection connector. The fault detection control of the global detection loop and the local detection loop is performed by independent second control modules, which is conducive to improving the reliability of the fault detection of the global detection loop and the local detection loop.

[0077] In a possible implementation, the second communication port of the first sub-control module MCU-11 is electrically connected to the second communication port of the second sub-control module MCU-12 and the second communication port of the N-1 second control modules through CAN lines. That is, the first sub-control module MCU-11 and the first sub-control module MCU-11 and the N-1 second control modules exchange data through a common CAN line. All the second control modules share the same communication network, which is convenient for centralized management and monitoring.

[0078] In a possible implementation, the CAN line has N lines, the second communication port of the first sub-control module MCU-11 is electrically connected with the N CAN lines respectively, and the N CAN lines are electrically connected with the second communication port of the second sub-control module MCU-12 and N-1 second control modules one by one. For example, the N CAN lines are CAN line 1, CAN line 2,..., and CAN line N respectively, the second communication port of the first sub-control module MCU-11 is electrically connected with the second communication port of the second sub-control module MCU-12 through the CAN line 1, the second communication port of the first sub-control module MCU-11 is electrically connected with the second communication port of the second control module MCU-2 through the CAN line 2, the second communication port of the first sub-control module MCU-11 is electrically connected with the second communication port of the second control module MCU-3 through the CAN line 3,..., and the second communication port of the first sub-control module MCU-11 is electrically connected with the second communication port of the second control module MCU-N through the CAN line N. Even if a CAN line fails, the other CAN lines can still work normally, realizing that there is an independent communication channel between the second sub-control module MCU-12 and each of the N-1 second control modules and the first sub-control module MCU-11, realizing independent and reliable communication between the first sub-control module MCU-11 and each second control module, enhancing the stability and scalability of the system, and simplifying the wiring and debugging process.

[0079] In a possible implementation, when the fault detection system is applied to a vehicle, the first sub-control module MCU-11 is a control chip of a vehicle controller or a battery management system, which is conducive to improving the flexibility of selection of the first sub-control module MCU-11.

[0080] Any one of the first control module and the second control module can enable the input port and the output port, and the input port and the output port are opened, so as to control the output port to output a signal and control the input port to receive a signal. Similarly, the control module does not enable the input port and the output port, and the input port and the output port are closed, so as to control the output port to stop outputting a signal and control the input port to stop receiving a signal.

[0081] In a possible implementation, the first sub-control module MCU-11 stops enabling the second input port and the second output port of the first sub-control module MCU-11 to control the second input port and the second output port of the first sub-control module to be closed in a case where the second communication port of the first sub-control module MCU-11 sends a fault detection signal to the second communication port of the second sub-control module MCU-12 and the second communication port of the N-1 second control modules. That is, during the fault detection on the second loop, the second input port and the second output port of the first sub-control module MCU-11 are both in a closed state, the second input port of the first sub-control module MCU-11 does not receive a signal, and the second output port of the first sub-control module MCU-11 does not output a signal, which is beneficial to reduce the energy consumption of the first sub-control module MCU-11.

[0082] In a possible implementation, the third communication port of the first sub-control module MCU-11 is electrically connected with a fault reminding device, where the fault reminding device includes a display device, a loudspeaker, or the like. For each of the second sub-control module MCU-12 and the N-1 second control modules, the first sub-control module MCU-11 sends, to the fault reminding device through the third communication port, the judgment result sent by the control module MCUj in a case where the first sub-control module MCU-11 receives the judgment result sent by the control module MCUj. In this way, the first sub-control module MCU-11 reports the N judgment results sent by the second sub-control module MCU-12 and the N-1 second control modules to the fault reminding device together, and a user can intuitively know whether a detection connector in the high-voltage interlocking loop is faulty, and if so, can intuitively see which detection connector sends the fault.

[0083] In a possible implementation, the third communication port of the first sub-control module MCU-11 is electrically connected with a fault reminding device, where the fault reminding device includes a display device, a loudspeaker, or the like. For each of the second sub-control module MCU-12 and the N-1 second control modules, the first sub-control module MCU-11 sends, to the fault reminding device through the third communication port, the judgment result sent by the control module MCUj in a case where the first sub-control module MCU-11 receives the judgment result sent by the control module MCUj. In this way, the first sub-control module MCU-11 reports the N judgment results sent by the second sub-control module MCU-12 and the N-1 second control modules to the fault reminding device together, and a user can intuitively know whether a detection connector in the high-voltage interlocking loop is faulty, and if so, can intuitively see which detection connector sends the fault.

[0084] The following is an example of a vehicle provided by the present application.

[0085] Figure 5 An example of a vehicle provided by the present application is shown as follows. Figure 5 As shown, a vehicle 300 provided by the present application includes a high-voltage interlock loop 200 and the above-mentioned fault detection system 100, the high-voltage interlock loop is provided with N detection connectors, and the fault detection system 100 is electrically connected with the N detection connectors, N≥2.

[0086] Since the fault detection system included in the above-mentioned vehicle adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and the vehicle not only can realize the detection of whether the high-voltage interlock loop is faulty, but also can realize the accurate positioning of the fault source in the case that the high-voltage interlock loop is faulty.

[0087] The above-mentioned is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by the present application specification and the attached drawings, or direct / indirect application in other related technical fields under the inventive concept of the present application are included in the patent protection range of the present application.

Claims

1. A fault detection system, characterized by, The application is applied to a high-voltage interlocking loop with multiple detection connectors, each detection connector has a first input port and a first output port, the multiple detection connectors are connected in series, the fault detection system comprises a first control module and multiple second control modules, the first control module and each second control module have a second communication port, a second input port and a second output port; For each second control module, the second control module corresponds to a detection connector, the second output port of the second control module is electrically connected to the first input port of the corresponding detection connector, and the second input port of the second control module is electrically connected to the first output port of the corresponding detection connector; The second communication port of the first control module is electrically connected to the second communication port of the multiple second control modules respectively, the second output port of the first control module is electrically connected to the first input port of the first detection connector in the multiple detection connectors, and the second input port of the first control module is electrically connected to the first output port of the last detection connector in the multiple detection connectors; Wherein, in the case that the first control module outputs a first detection signal from the second output port of the first control module and the second input port of the first control module does not receive the first detection signal, the second communication port of the first control module sends a fault detection signal to the second communication port of the multiple second control modules; For each second control module, the second control module outputs a second detection signal from the second output port of the second control module in the case of receiving the fault detection signal, and judges whether the detection connector connected to the second control module is faulty according to whether the second input port of the second control module receives the second detection signal, and sends the judgment result to the second communication port of the first control module.

2. The fault detection system of claim 1, wherein, The first control module is any one of the multiple second control modules, and the second communication port of the first control module is electrically connected to the second communication port of the other second control modules except the first control module in the multiple second control modules.

3. The fault detection system of claim 2, wherein, The second input port of the first control module comprises a first sub-input port and a second sub-input port, and the second output port of the first control module comprises a first sub-output port and a second sub-output port; The first sub-output port is electrically connected to the first input port of the first detection connector, the first sub-input port is electrically connected to the first output port of the last detection connector, the second sub-output port is electrically connected to the first input port of the detection connector corresponding to the first control module, and the second sub-input port is electrically connected to the first input port of the detection connector corresponding to the first control module; In the case that the first control module outputs the first detection signal from the first sub-output port and the first sub-input port does not receive the first detection signal, the second communication port of the first control module sends a fault detection signal to the second communication port of the multiple second control modules; The first control module outputs the second detection signal from the second sub-output port in the case of receiving the fault detection signal, and judges whether the detection connector connected with the first control module is faulty according to whether the second sub-input port receives the second detection signal, and sends the judging result to the first control module.

4. The fault detection system of claim 3, wherein, The first sub-output port is electrically connected with the first output port of the first detection connector through a switch module.

5. The fault detection system of claim 2, wherein, The first control module comprises a first sub-control module and a second sub-control module, the second communication port of the first sub-control module is electrically connected with the second communication port of the second sub-control module and the second communication port of the other second control modules respectively, the second output port of the first sub-control module is electrically connected with the first input port of the first detection connector, and the second input port of the first sub-control module is electrically connected with the first output port of the last detection connector. In the case that the first sub-control module outputs the first detection signal from the second output port of the first sub-control module and the second input port of the first sub-control module does not receive the first detection signal, the second communication port of the first sub-control module sends a fault detection signal to the second communication ports of the second sub-control module and the other second control modules.

6. The fault detection system of claim 5, wherein, The first sub-control module is a control chip of a vehicle controller or a battery management system.

7. The fault detection system of claim 5, wherein, In the case that the first sub-control module sends the fault detection signal to the second communication ports of the second sub-control module and the other second control modules from the second communication port of the first sub-control module, the second input port and the second output port of the first sub-control module are disabled to control the second input port and the second output port of the first sub-control module to be closed.

8. The fault detection system of claim 5, wherein, The third communication port of the first sub-control module is electrically connected with a fault reminding device. For each of the second sub-control module and the other second control modules, the first sub-control module sends the judging result sent by the control module to the fault reminding device through the third communication port in the case of receiving the judging result sent by the control module, and the control module sends the judging result to the fault reminding device through a fourth communication port.

9. The fault detection system of claim 1, wherein, The second input port of the first control module is electrically connected with the first output port of the last detection connector through a switch module.

10. A vehicle characterized by comprising: The vehicle comprises: A high-voltage interlocking loop, which is provided with a plurality of detection connectors; The fault detection system according to any one of claims 1 to 9, which is electrically connected with the plurality of detection connectors.

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