Fault detection method and device, vehicle and storage medium

Abstract

The embodiment of the invention discloses a fault detection method and device, a vehicle and a storage medium. The method comprises the following steps: acquiring a conductive monitoring signal and a pressure monitoring signal of a high-voltage connection system monitored by a control system; and determining a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal. Through the above method, monitoring and diagnosis of the water immersion fault of the high-voltage connection system can be realized, and further remote automatic diagnosis of the fault of the high-voltage connection system can be realized.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to a fault detection method, device, vehicle and storage medium. Background Art

[0002] The high-voltage connection system is composed of high-voltage cables and high-voltage connectors, and is a connecting device that conducts Class B voltage circuits between high-voltage components of electric vehicles. When the high-voltage connector in the high-voltage connection system is abnormal, quality problems such as overheating, transient disconnection and water immersion will occur. In severe cases, it will cause power outages, charging failures, thermal runaway, and even fires. However, the relevant fault detection methods cannot monitor and diagnose water immersion faults in high-voltage connection systems. Summary of the invention

[0003] In view of the above problems, the present application proposes a fault detection method, device, vehicle and storage medium to improve the above problems.

[0004] In a first aspect, an embodiment of the present application provides a fault detection method, the method comprising: acquiring a conductive monitoring signal and a pressure monitoring signal of a high-voltage connection system monitored by a control system; and determining a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

[0005] In the second aspect, an embodiment of the present application provides a fault detection device, which includes: a signal acquisition unit, used to acquire a conductive monitoring signal and a pressure monitoring signal of a high-voltage connection system monitored by a control system; and a result determination unit, used to determine a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

[0006] In a third aspect, an embodiment of the present application provides a fault detection system, which includes a monitoring system and a high-voltage connection system, wherein the high-voltage connection system is used to send a conductive monitoring signal and a pressure monitoring signal to the monitoring system; and the monitoring system is used to determine a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

[0007] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising one or more processors and a memory; one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute the above-mentioned method.

[0008] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a program code is stored, wherein the above method is executed when the program code is run.

[0009] The embodiments of the present application provide a fault detection method, device, vehicle and storage medium. First, the conductive monitoring signal and pressure monitoring signal of the high-voltage connection system monitored by the control system are obtained, and then the water immersion fault detection result of the high-voltage connection system is determined based on the conductive monitoring signal and the pressure monitoring signal. Through the above method, the monitoring and diagnosis of the water immersion fault of the high-voltage connection system can be realized, and further, the remote automatic diagnosis of the fault of the high-voltage connection system can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A flow chart of a fault detection method proposed in an embodiment of the present application is shown;

[0012] Figure 2 A system structure block diagram described in an embodiment of the present application is shown;

[0013] Figure 3 A flowchart of a fault detection method proposed in another embodiment of the present application is shown;

[0014] Figure 4 A schematic diagram of the process described in step S210 to step S250 in another embodiment of the present application is shown;

[0015] Figure 5 A flowchart of a fault detection method proposed in another embodiment of the present application is shown;

[0016] Figure 6 shows a system structure block diagram described in another embodiment of the present invention;

[0017] Figure 7 A schematic diagram of the process described in step S330 to step S340 in another embodiment of the present application is shown;

[0018] Figure 8 A flowchart of a fault detection method proposed in another embodiment of the present application is shown;

[0019] Fig. 9 shows a system structure block diagram described in yet another embodiment of the present invention;

[0020] Fig.10 A schematic diagram of the process described in step S450 to step S460 in another embodiment of the present application is shown;

[0021] Fig.11 A structural block diagram of a fault detection device proposed in an embodiment of the present application is shown;

[0022] Fig.12 A structural block diagram of a fault detection system proposed in an embodiment of the present application is shown;

[0023] Fig.13 A structural block diagram of a vehicle for executing a fault detection method according to an embodiment of the present application is shown;

[0024] Fig.14 A storage unit in an embodiment of the present application is shown for storing or carrying program codes for implementing a fault detection method according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The embodiments of the present application propose a fault detection method, device, vehicle and storage medium. First, the conductive monitoring signal and pressure monitoring signal of the high-voltage connection system monitored by the control system are obtained, and then the water immersion fault detection result of the high-voltage connection system is determined based on the conductive monitoring signal and the pressure monitoring signal. Through the above method, the monitoring and diagnosis of the water immersion fault of the high-voltage connection system can be realized, and further, the remote automatic diagnosis of the fault of the high-voltage connection system can be realized.

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1 , an embodiment of the present application provides a fault detection method, the method comprising:

[0029] Step S110: Acquire the conductivity monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system.

[0030] In the embodiment of the present application, the electrode conductivity and the internal and external pressure balance of the high-voltage connection system are monitored by a control system.

[0031] Among them, the electrode conductivity of the high-voltage connection system refers to the conductivity of the conductive electrodes in the high-voltage connection system; the internal and external pressure balance of the high-voltage connection system refers to the pressure balance inside and outside the high-voltage connector in the high-voltage connection system.

[0032] As a method, a conductive monitoring module and a pressure monitoring module may be provided in the control system, and a conductive electrode and a pressure sensor may be provided in the high-voltage connection system. The conductive electrode is fixed in the high-voltage connector of the high-voltage connection system, and is connected to the conductive monitoring module through a wiring harness. The conductive monitoring module collects and processes conductive monitoring signals at both ends of the conductive electrode, that is, the conductive monitoring module is used to monitor the conductivity of the electrodes of the high-voltage connection system. The pressure sensor may include a pressure sensor A and a pressure sensor B, wherein the pressure sensor A is fixed in the high-voltage connector, and the pressure sensor B is fixed outside the high-voltage connector. The pressure sensor A and the pressure sensor B are connected to the pressure monitoring module through a wiring harness. The pressure monitoring module collects and processes pressure monitoring signals, that is, the pressure monitoring module is used to monitor the internal and external pressure balance of the high-voltage connection system. The system structure described above may be as follows Figure 2 shown.

[0033] The electrode conduction condition of the high-voltage connection system may include that the conductive electrode of the high-voltage connection system is in a conductive state, or that the conductive electrode of the high-voltage connection system is in a non-conductive state. The conductive electrode being in a conductive state indicates that the high-voltage connection system is in an abnormal working state and a fault may occur, and the conductive electrode being non-conductive indicates that the high-voltage connection system is in a normal working state.

[0034] The internal and external pressure balance of the high-voltage connection system may include the pressure inside the high-voltage connector in the high-voltage connection system and the pressure outside the high-voltage connector being in a balanced state, or the pressure inside the high-voltage connector in the high-voltage connection system and the pressure outside the high-voltage connector being in an unbalanced state. Being in a balanced state indicates that the high-voltage connection system is in a normal working state, and being in an unbalanced state indicates that the high-voltage connection system is in an abnormal working state and a failure may occur.

[0035] In the embodiment of the present application, the conductivity of the electrodes and the balance of internal and external pressures of the high-voltage connection system can be continuously monitored by a conductivity monitoring module and a pressure monitoring module provided in the control system.

[0036] In an embodiment of the present application, if the conductive monitoring signal of the high-voltage connection system is monitored by the control system, it indicates that there is no conductive monitoring signal loss fault; if the pressure monitoring signal is monitored by the control system, it indicates that there is no pressure monitoring signal loss fault; conversely, if the conductive monitoring signal of the high-voltage connection system is not monitored by the control system, it indicates that there is a conductive monitoring signal loss fault, and the conductive monitoring module maintenance information is prompted; if the pressure monitoring signal is not monitored by the monitoring system, it indicates that there is a pressure monitoring signal loss fault, and the pressure monitoring module maintenance information is prompted.

[0037] Step S120: Determine a water immersion fault detection result of the high voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

[0038] The water flooding fault detection result may include whether a water flooding fault occurs or not.

[0039] As a method, when the conductive monitoring signal and pressure monitoring signal of the high-voltage connection system are monitored by the control system, it can be determined that there is no conductive monitoring signal loss fault and pressure monitoring signal loss fault. At this time, it is possible to detect whether the high-voltage connection system has a water immersion fault based on the collected conductive monitoring signal and pressure monitoring signal. Among them, the water immersion fault in the high-voltage connection system refers to the intrusion of water into the high-voltage cable, connector or related electrical equipment due to poor sealing or damaged insulation layer, which in turn causes safety hazards or fault conditions such as electrical performance degradation, short circuit, corrosion, etc.

[0040] The present application provides a fault detection method, which first obtains the conductive monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system, and then determines the water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal. Through the above method, the monitoring and diagnosis of the water immersion fault of the high-voltage connection system can be realized, and further, the remote automatic diagnosis of the fault of the high-voltage connection system can be realized.

[0041] See also Figure 3 , an embodiment of the present application provides a fault detection method, the method comprising:

[0042] Step S210: Acquire the conductivity monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system.

[0043] Step S220: Determine the current pressure difference of the high-voltage connection system based on the pressure monitoring signal.

[0044] In the embodiment of the present application, the current pressure difference of the high-voltage connection system may include the internal and external pressure difference and the external pressure difference of the high-voltage connection system.

[0045] As one embodiment, the high-voltage connection system includes a high-voltage connector, and the high-voltage connection system connects a first component and a second component; the current pressure difference of the high-voltage connection system is determined based on the pressure monitoring signal, including: determining the first pressure difference of the high-voltage connection system based on the first pressure signal and the second pressure signal in the pressure monitoring signal, wherein the first pressure signal represents the ambient pressure value outside the high-voltage connector collected from the first component, and the second pressure signal represents the ambient pressure value outside the high-voltage connector collected from the second component; determining the second pressure difference of the high-voltage connection system based on the third pressure signal in the pressure monitoring signal and the first pressure signal, wherein the third pressure signal represents the real-time pressure value inside the high-voltage connector collected from the first component; determining the third pressure difference of the high-voltage connection system based on the fourth pressure signal in the pressure monitoring signal and the second pressure signal, wherein the fourth pressure signal represents the real-time pressure value inside the high-voltage connector collected from the second component.

[0046] Among them, the first component and the second component are high-voltage components connected to the high-voltage connection system, and the first component and the second component can refer to at least one component respectively, which is not specifically limited here. In an embodiment of the present application, after the high-voltage connection system connects the first component and the second component, a pressure monitoring signal can be obtained through a pressure sensor provided in the high-voltage connection system, and the pressure monitoring signal may include a first pressure signal, a second pressure signal, a third pressure signal and a fourth pressure signal. Among them, the first pressure signal is the ambient pressure value outside the high-voltage connector collected from the first component through pressure sensor B, the second pressure signal is the ambient pressure value outside the high-voltage connector collected from the second component through pressure sensor B, the third pressure signal is the real-time pressure value inside the high-voltage connector collected from the first component through pressure sensor A, and the fourth pressure signal is the real-time pressure value inside the high-voltage connector collected from the second component through pressure sensor A.

[0047] After obtaining the first pressure signal, the second pressure signal, the third pressure signal and the fourth pressure signal through the pressure sensor A and the pressure sensor B, the high-voltage connection system can transmit the first pressure signal, the second pressure signal, the third pressure signal and the fourth pressure signal to the pressure monitoring module in the monitoring system, and then the pressure monitoring module can calculate the current pressure difference based on the first pressure signal, the second pressure signal, the third pressure signal and the fourth pressure signal. Specifically, the first pressure signal, the second pressure signal, the third pressure signal and the fourth pressure signal can be respectively expressed as P 01 , P 02 , P1 and P2; the pressure monitoring module can calculate the first pressure difference based on the first pressure signal and the second pressure signal, that is, △P0=P 01 -P02 The pressure monitoring module can calculate the second pressure difference based on the third pressure signal and the first pressure signal, that is, △P1=P1-P 01 The pressure monitoring module can calculate the third pressure difference based on the fourth pressure signal and the second pressure signal, that is, △P2=P2-P 02 ; The first pressure difference, the second pressure difference and the third pressure difference calculated here refer to the internal and external pressure difference and the external pressure difference of the high-pressure connection system.

[0048] Step S230: Based on the current pressure difference and the pressure monitoring signal, determine whether the internal and external pressures of the high-pressure connection system are in a balanced state.

[0049] In an embodiment of the present application, after calculating the current pressure difference, it is possible to determine whether the internal and external pressures of the high-voltage connection system are in a balanced state based on the calculated current pressure difference and the pressure monitoring signal, that is, to determine whether the high-voltage connection system is in a normal working state.

[0050] As a method, if the first pressure difference is zero, the third pressure signal is the same as the fourth pressure signal, and the second pressure difference is the same as the third pressure difference, it is determined that the internal and external pressures of the high-voltage connection system are in a balanced state; if the first pressure difference is zero and the third pressure signal is different from the fourth pressure signal, and / or if the first pressure difference is zero and the second pressure difference is different from the third pressure difference, it is determined that the internal and external pressures of the high-voltage connection system are in an unbalanced state.

[0051] Specifically, if △P0=0, P1=P2 and △P1=△P2, it is determined that the internal and external pressures of the high-pressure connection system are in a balanced state; otherwise, it is determined that the internal and external pressures of the high-pressure connection system are in an unbalanced state. When determining whether the internal and external pressures of the high-pressure connection system are in a balanced state, you can first determine whether △P0 is 0. If △P0=0, then continue to determine whether P1 is equal to P2 and whether △P1 is equal to △P2. If △P0≠0, it can be determined that the pressure monitoring signal is abnormal. When judging whether P1 is equal to P2 and whether △P1 is equal to △P2, if P1=P2 and △P1=△P2, it can be determined that the internal and external pressures of the high-pressure connection system are in a balanced state. Otherwise, it is determined that the internal and external pressures of the high-pressure connection system are in an unbalanced state.

[0052] Step S240: determining whether the conductive electrodes of the high-voltage connection system are in a conductive state based on the conductive monitoring signal.

[0053] In the embodiment of the present application, the conductivity monitoring signal is a voltage signal at both ends of the conductive electrodes in the high-voltage connection system acquired by the conductivity monitoring module, and the conductivity monitoring signal can be represented by U.

[0054] As a method, if the voltage value represented by the conductive monitoring signal is zero, it is determined that the conductive electrode of the high-voltage connection system is in a non-conductive state; if the voltage value represented by the conductive monitoring signal is not zero, it is determined that the conductive electrode of the high-voltage connection system is in a conductive state.

[0055] Specifically, if U=0, it can be determined that the conductive electrodes of the high-voltage connection system are in a non-conductive state, otherwise, it can be determined that the conductive electrodes of the high-voltage connection system are in a conductive state.

[0056] Step S250: If it is determined that the internal and external pressures of the high-voltage connection system are in an unbalanced state, and it is determined that the conductive electrodes of the high-voltage connection system are in a conducting state, it is determined that the high-voltage connection system is in a water immersion fault state.

[0057] In the embodiment of the present application, when determining whether the high-voltage connection system is in a water immersion fault state, it is necessary to combine the monitoring signals obtained by the conductive monitoring module and the pressure monitoring module to make a judgment. Specifically, if P1≠P2 and △P1≠△P2 and U≠0, it can be determined that the high-voltage connection system is in a water immersion fault state, and the connector maintenance information in the high-voltage connection system is prompted.

[0058] Exemplarily, the process described in step S210 to step S250 can be as follows: Figure 4 shown.

[0059] A fault detection method provided in the present application can realize monitoring and diagnosis of water immersion faults in a high-voltage connection system, and further can realize remote automatic diagnosis of faults in the high-voltage connection system.

[0060] See also Figure 5 , an embodiment of the present application provides a fault detection method, the method comprising:

[0061] Step S310: Acquire the conductivity monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system.

[0062] Step S320: Determine a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

[0063] Step S330: Acquire the temperature monitoring signal of the high-voltage connection system monitored by the monitoring system.

[0064] In an embodiment of the present application, the temperature of the high-voltage connection system is monitored by the monitoring system.

[0065] The monitoring system is also provided with a temperature monitoring module, and the high-voltage connection system is also provided with a temperature sensor and a power terminal. The power terminal is fixed in the high-voltage connector and connected to the high-voltage cable to achieve the connection between the high-voltage connection systems; the temperature sensor is tightly attached to the power terminal in the high-voltage connector, and the temperature sensor is connected to the temperature monitoring module through a wiring harness. The temperature monitoring module collects and processes the temperature monitoring signal. The structural diagram described above can be shown as follows Figure 6 shown.

[0066] As a method, the temperature of the high-voltage connection system can be continuously monitored by a temperature monitoring module provided in the control system, wherein the temperature monitoring module obtains the temperature change of the power terminal collected by the high-voltage connection system.

[0067] In an embodiment of the present application, if the temperature monitoring signal of the high-voltage connection system is monitored by the control system, it indicates that there is no temperature monitoring signal loss failure. If the temperature monitoring signal is not monitored by the control system, it indicates that there is a temperature monitoring signal loss failure, and the temperature monitoring module maintenance information is prompted.

[0068] Step S340: determining an over-temperature fault detection result of the high-voltage connection system based on the temperature monitoring signal.

[0069] In the embodiments of the present application, an over-temperature fault generally refers to a situation in which the temperature of a device or system exceeds its normal operating temperature range during operation, thereby triggering a fault alarm.

[0070] After the temperature monitoring signal of the high-voltage connection system is detected by the temperature monitoring module in the control system, it is possible to detect whether an over-temperature fault occurs in the high-voltage connection system based on the temperature monitoring signal.

[0071] As one method, the over-temperature fault detection of the high-voltage connection system based on the temperature monitoring signal includes: determining the current temperature difference based on the real-time temperature signal and the starting temperature signal in the temperature monitoring signal, the real-time temperature signal is the real-time temperature value of the high-voltage connection system collected, and the starting temperature signal is the starting temperature value of the high-voltage connection system collected; based on the real-time temperature signal and the current temperature difference, performing over-temperature fault detection on the high-voltage connection system.

[0072] Among them, the current temperature difference = the real-time temperature value of the high-voltage connection system - the starting temperature value of the high-voltage connection system. The starting temperature value of the high-voltage connection system may refer to the temperature value collected when the high-voltage connection system is turned on; the real-time temperature value of the high-voltage connection system may refer to the temperature value of the high-voltage connection system collected during the real-time operation of the vehicle.

[0073] When the high-voltage connection system is subjected to over-temperature fault detection based on the current temperature and the real-time temperature signal, if the temperature value represented by the real-time temperature signal is greater than the preset temperature value, and the current temperature difference is greater than the preset temperature difference, it can be determined that the high-voltage connection system is in an over-temperature fault state, and the maintenance information of the high-voltage connector in the high-voltage connection system is prompted; otherwise, it can be determined that the high-voltage connection system is in normal working condition.

[0074] As one of the ways, the high-voltage connection system connects a first component and a second component; the determining the current temperature difference based on the real-time temperature signal and the starting temperature signal in the temperature monitoring signal comprises: determining a first temperature difference based on a first temperature signal and a first starting temperature signal in the temperature monitoring signal, wherein the first temperature signal is a real-time temperature value collected from a first end of the first component, and the first starting temperature signal is a starting temperature value collected from the first end of the first component; determining a second temperature difference based on a second temperature signal and a second starting temperature signal in the temperature monitoring signal, wherein the second temperature signal is a real-time temperature value collected from a second end of the first component. value, the second starting temperature signal represents the starting temperature value collected from the second end of the first component; based on the third temperature signal and the third starting temperature signal in the temperature monitoring signal, a third temperature difference is determined, wherein the third temperature signal represents the real-time temperature value collected from the first end of the second component, and the third starting temperature signal represents the starting temperature value collected from the first end of the second component; based on the fourth temperature signal and the fourth starting temperature signal in the temperature monitoring signal, a fourth temperature difference is determined, wherein the fourth temperature signal represents the real-time temperature value collected from the second end of the second component, and the fourth starting temperature signal represents the starting temperature value collected from the second end of the second component.

[0075] In an embodiment of the present application, after the high-voltage connection system connects the first component and the second component, a temperature monitoring signal can be obtained through a temperature sensor provided in the high-voltage connection system, and the temperature monitoring signal may include a first temperature signal, a second temperature signal, a third temperature signal, a fourth temperature signal, a first starting temperature signal, a second starting temperature signal, a third starting temperature signal and a fourth starting temperature signal.

[0076] After obtaining the first temperature signal, the second temperature signal, the third temperature signal, the fourth temperature signal, the first starting temperature signal, the second starting temperature signal, the third starting temperature signal and the fourth starting temperature signal through the temperature sensor, the high-voltage connection system can transmit the first temperature signal, the second temperature signal, the third temperature signal, the fourth temperature signal, the first starting temperature signal, the second starting temperature signal, the third starting temperature signal and the fourth starting temperature signal to the temperature monitoring module in the monitoring system, and then the temperature monitoring module can calculate the current temperature difference based on the first temperature signal, the second temperature signal, the third temperature signal, the fourth temperature signal, the first starting temperature signal, the second starting temperature signal, the third starting temperature signal and the fourth starting temperature signal. Specifically, the first temperature signal, the second temperature signal, the third temperature signal, the fourth temperature signal, the first starting temperature signal, the second starting temperature signal, the third starting temperature signal and the fourth starting temperature signal can be expressed as T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T31, T41, T5 01 , T 02 , T 03 , T 04 The temperature monitoring module can calculate the first temperature difference based on the first temperature signal and the first starting temperature signal, that is, △T1=T1-T 01 The temperature monitoring module can calculate the second temperature difference based on the second temperature signal and the second starting temperature signal, that is, △T2 = T2-T 02 The temperature monitoring module can calculate the third temperature difference based on the third temperature signal and the third starting temperature signal, that is, △T3=T3-T 03 The temperature monitoring module can calculate the fourth temperature difference based on the fourth temperature signal and the fourth starting temperature signal, that is, △T4=T4-T 04 .

[0077] As another embodiment, the over-temperature fault detection is performed on the high-voltage connection system based on the real-time temperature signal and the current temperature difference, including: if the first temperature signal and the second temperature signal are both greater than the preset temperature, and the first temperature difference and the second temperature difference are both greater than the preset temperature difference, it is determined that the first component is in an over-temperature fault state; if the third temperature signal and the fourth temperature signal are both greater than the preset temperature, and the third temperature difference and the fourth temperature difference are both greater than the preset temperature difference, it is determined that the second component is in an over-temperature fault state.

[0078] The preset temperature is the maximum temperature value allowed by the preset high-voltage connection system, and the preset temperature difference is the maximum temperature difference allowed by the preset high-voltage connection system.

[0079] Specifically, first determine whether T1 and T2 are both greater than the preset temperature T max , and determine whether △T1 and △T2 are both greater than the preset temperature difference △Tmax ; If T1 and T2 are both greater than the preset temperature T max And △T1 and △T2 are greater than the preset temperature difference △T max , determine that the first component is in an over-temperature fault state; otherwise, continue to determine whether T3 and T4 are both greater than the preset temperature T max , and determine whether △T3 and △T4 are both greater than the preset temperature difference △T max ; If T3 and T4 are both greater than the preset temperature T max , and △T3 and △T4 are greater than the preset temperature difference △T max , it is determined that the second component is in an over-temperature fault state; otherwise, it can be determined that both the first component and the second component are in a normal working state, that is, it is determined that the high-voltage connection system is in a normal working state. Exemplarily, the process described in step S330-step S340 can be as follows Figure 7 shown.

[0080] The present application provides a fault detection method, which monitors the power terminal temperature in real time through a temperature sensor connected to a temperature monitoring module in a control system to realize over-temperature fault monitoring and diagnosis of a high-voltage connection system, requiring that the maximum temperature of the power terminal collected should not exceed the maximum temperature allowed by the system, and the maximum temperature rise of the power terminal should not exceed the maximum temperature rise allowed by the system. When the temperature or temperature rise is greater than the allowable value, the high-voltage connection system is judged to be overheated, the safety measures of the whole vehicle are activated, and the relevant fault type and location are prompted.

[0081] See also Figure 8 , an embodiment of the present application provides a fault detection method, the method comprising:

[0082] Step S410: Acquire the conductivity monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system.

[0083] Step S420: Determine a water immersion fault detection result of the high-voltage connection system based on the conductivity monitoring signal and the pressure monitoring signal.

[0084] Step S430: Acquire the temperature monitoring signal of the high-voltage connection system monitored by the monitoring system.

[0085] Step S440: determining an over-temperature fault detection result of the high-voltage connection system based on the temperature monitoring signal.

[0086] In the embodiment of the present application, the process described in step S410 to step S440 can refer to the description in the aforementioned embodiment and will not be repeated here.

[0087] Step S450: Acquire the resistance monitoring signal of the high-voltage connection system monitored by the control system.

[0088] In an embodiment of the present application, the current continuity of the loop of the high-voltage connection system is monitored by the monitoring system.

[0089] The monitoring system is also provided with a continuity monitoring module, and the high voltage connection system is also provided with an HVIL terminal. The HVIL terminal is fixed in the high voltage connector and connected to the continuity monitoring module through a wiring harness. The continuity monitoring module collects and processes the consistency Hvil signal, i.e., the resistance monitoring signal. The structural diagram described above can be shown as Fig. 9 shown.

[0090] As a method, the current continuity of the HVIL loop of the high voltage connection system can be continuously monitored by a continuity monitoring module provided in the control system.

[0091] In an embodiment of the present application, if the resistance monitoring signal of the high-voltage connection system is monitored by the control system, it indicates that there is no continuity monitoring signal loss fault. If the resistance monitoring signal is not monitored by the control system, it indicates that there is a continuity monitoring signal loss fault, and the continuity monitoring module maintenance information is prompted.

[0092] Step S460: Determine the instantaneous fault detection result of the high voltage connection system based on the resistance monitoring signal.

[0093] In the embodiments of the present application, a momentary disconnection fault refers to a short, intermittent disconnection phenomenon that occurs in a connector, network or electronic device during the connection process.

[0094] After the resistance monitoring signal of the high-voltage connection system is detected by the continuity monitoring module in the control system, it is possible to detect whether a momentary interruption fault occurs in the high-voltage connection system based on the resistance monitoring signal.

[0095] As a method, if the resistance value represented by the resistance monitoring signal is greater than the preset resistance for a period of time exceeding the preset time, it is determined that the circuit of the high-voltage connection system is in a momentary fault state.

[0096] The preset time is the maximum time that can be set to determine that the circuit has not experienced a momentary fault. For example, the preset time can be set to 1 μs. The preset resistance is the minimum resistance that the circuit can flow through. For example, the preset resistance can be set to 7Ω. Specifically, if the resistance value R represented by the resistance monitoring signal is c If the resistance is continuously greater than 7Ω for more than 1μs, it can be determined that the circuit of the high-voltage connection system is in a momentary fault state.

[0097] Exemplarily, the process described in step S450-step S460 can be as follows: Fig.10 shown.

[0098] The present application provides a fault detection method, which monitors the current continuity of the HVIL loop through the continuity monitoring module in the control system to realize the monitoring and diagnosis of the transient fault of the high-voltage connection system, requiring that the HVIL loop impedance is greater than 7Ω for no more than 1μs. When the loop impedance is abnormal, it is determined that the high-voltage connection system loop is disconnected or the integrity is damaged, and the safety measures of the whole vehicle are activated, indicating the relevant fault type and location.

[0099] See also Fig.11 , an embodiment of the present application provides a fault detection device 500, the device 500 comprising:

[0100] The signal acquisition unit 510 is used to acquire the conductivity monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system.

[0101] As a method, the signal acquisition unit 510 is specifically used to acquire the temperature monitoring signal of the high-voltage connection system monitored by the monitoring system.

[0102] The result determination unit 520 is used to determine the water immersion fault detection result of the high-voltage connection system based on the conductivity monitoring signal and the pressure monitoring signal.

[0103] As a method, the result determination unit 520 is specifically used to determine the current pressure difference of the high-voltage connection system based on the pressure monitoring signal; determine whether the internal and external pressures of the high-voltage connection system are in a balanced state based on the current pressure difference and the pressure monitoring signal; determine whether the conductive electrodes of the high-voltage connection system are in a conductive state based on the conductive monitoring signal; if it is determined that the internal and external pressures of the high-voltage connection system are in an unbalanced state, and it is determined that the conductive electrodes of the high-voltage connection system are in a conductive state, it is determined that the high-voltage connection system is in a water immersion fault state.

[0104] Further, the high-voltage connection system includes a high-voltage connector, and the high-voltage connection system connects a first component and a second component; the result determination unit 520 is specifically used to determine a first pressure difference of the high-voltage connection system based on the first pressure signal and the second pressure signal in the pressure monitoring signal, wherein the first pressure signal represents the ambient pressure value outside the high-voltage connector collected from the first component, and the second pressure signal represents the ambient pressure value outside the high-voltage connector collected from the second component; based on the third pressure signal in the pressure monitoring signal and the first pressure signal, determine the second pressure difference of the high-voltage connection system, wherein the third pressure signal represents the real-time pressure value inside the high-voltage connector collected from the first component; based on the fourth pressure signal in the pressure monitoring signal and the second pressure signal, determine the third pressure difference of the high-voltage connection system, wherein the fourth pressure signal represents the real-time pressure value inside the high-voltage connector collected from the second component.

[0105] Furthermore, the result determination unit 520 is specifically used to determine that the internal and external pressures of the high-voltage connection system are in a balanced state if the first pressure difference is zero, the third pressure signal is the same as the fourth pressure signal, and the second pressure difference is the same as the third pressure difference; if the first pressure difference is zero and the third pressure signal is different from the fourth pressure signal, and / or if the first pressure difference is zero and the second pressure difference is different from the third pressure difference, determine that the internal and external pressures of the high-voltage connection system are in an unbalanced state.

[0106] Furthermore, the result determination unit 520 is specifically used to determine that the conductive electrode of the high-voltage connection system is in a non-conductive state if the voltage value represented by the conductive monitoring signal is zero; and to determine that the conductive electrode of the high-voltage connection system is in a conductive state if the voltage value represented by the conductive monitoring signal is not zero.

[0107] As another way, the result determination unit 520 is specifically configured to determine the over-temperature fault detection result of the high-voltage connection system based on the temperature monitoring signal.

[0108] See also Fig.12 The embodiment of the present application provides a fault detection system 600, wherein the fault detection system 600 includes a monitoring system 610 and a high-voltage connection system 620.

[0109] The high voltage connection system 620 is used to send a conductive monitoring signal and a pressure monitoring signal to the monitoring system 610 .

[0110] The monitoring system 610 is used to determine a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

[0111] It should be noted that the device embodiment in the present application corresponds to the aforementioned method embodiment. The specific principles in the device embodiment can be found in the contents of the aforementioned method embodiment and will not be repeated here.

[0112] The following will be combined Fig.13 A vehicle provided in the present application is described.

[0113] See also Fig.13 Based on the above fault detection method and device, the embodiment of the present application also provides another vehicle 800 that can execute the above fault detection method. The vehicle 800 includes one or more (only one is shown in the figure) processors 802, a memory 804, a millimeter wave radar 806 and a network module 806 that are coupled to each other. Among them, the memory 804 stores a program that can execute the content of the above embodiment, and the processor 802 can execute the program stored in the memory 804.

[0114] Among them, the processor 802 may include one or more processing cores. The processor 802 uses various interfaces and lines to connect various parts of the entire vehicle 800, and executes various functions and processes data of the vehicle 800 by running or executing instructions, programs, code sets or instruction sets stored in the memory 804, and calling data stored in the memory 804. Optionally, the processor 802 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 802 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 802, but may be implemented separately through a communication chip.

[0115] The memory 804 may include a random access memory (RAM) or a read-only memory (ROM). The memory 804 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 804 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the following various method embodiments, etc. The data storage area may also store data created by the vehicle 800 during use (such as a phone book, audio and video data, chat record data), etc.

[0116] The network module 806 is used to receive and send electromagnetic waves, realize the mutual conversion between electromagnetic waves and electrical signals, and thus communicate with a communication network or other devices, such as communicating with a vehicle. The network module 806 may include various existing circuit elements for performing these functions, such as antennas, radio frequency transceivers, digital signal processors, encryption / decryption chips, user identity modules (SIM) cards, memories, etc. The network module 806 may communicate with various networks such as the Internet, corporate intranets, wireless networks, or communicate with other devices via wireless networks. The above-mentioned wireless networks may include cellular telephone networks, wireless local area networks, or metropolitan area networks. For example, the network module 806 may exchange information with a base station.

[0117] Please refer to Fig.14 , which shows a structural block diagram of a computer-readable storage medium provided in an embodiment of the present application. The computer-readable storage medium 900 stores program codes, which can be called by a processor to execute the method described in the above method embodiment.

[0118] The computer-readable storage medium 900 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer-readable storage medium 900 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 900 has storage space for program code 910 that performs any method step in the above method. These program codes can be read from or written to one or more computer program products. The program code 910 can be compressed, for example, in an appropriate form.

[0119] The present application provides a fault detection method, device, vehicle and storage medium, which first obtains the conductive monitoring signal and pressure monitoring signal of the high-voltage connection system monitored by the control system, and then determines the water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal. Through the above method, the monitoring and diagnosis of the water immersion fault of the high-voltage connection system can be realized, and further, the remote automatic diagnosis of the fault of the high-voltage connection system can be realized.

[0120] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A fault detection method, characterized in that: The method comprises: Acquire the conductive monitoring signal and the pressure monitoring signal of the high-voltage connection system monitored by the control system; Based on the conduction monitoring signal and the pressure monitoring signal, a water immersion fault detection result of the high voltage connection system is determined.

2. The method according to claim 1, characterized in that The determining, based on the conductive monitoring signal and the pressure monitoring signal, a water immersion fault detection result of the high-voltage connection system comprises: determining a current pressure difference of the high-voltage connection system based on the pressure monitoring signal; Based on the current pressure difference and the pressure monitoring signal, determining whether the internal and external pressures of the high-pressure connection system are in a balanced state; determining whether the conductive electrode of the high voltage connection system is in a conductive state based on the conductive monitoring signal; If it is determined that the internal and external pressures of the high-voltage connection system are in an unbalanced state, and if it is determined that the conductive electrodes of the high-voltage connection system are in a conducting state, it is determined that the high-voltage connection system is in a water immersion fault state.

3. The method according to claim 2, characterized in that The high-voltage connection system includes a high-voltage connector, and the high-voltage connection system connects a first component and a second component; and determining a current pressure difference of the high-voltage connection system based on the pressure monitoring signal includes: Determining a first pressure difference of the high-voltage connection system based on a first pressure signal and a second pressure signal in the pressure monitoring signal, wherein the first pressure signal represents an ambient pressure value outside the high-voltage connector collected from the first component, and the second pressure signal represents an ambient pressure value outside the high-voltage connector collected from the second component; determining a second pressure difference of the high-voltage connection system based on a third pressure signal in the pressure monitoring signal and the first pressure signal, wherein the third pressure signal represents a real-time pressure value in the high-voltage connector collected from the first component; A third pressure difference of the high-voltage connection system is determined based on a fourth pressure signal in the pressure monitoring signal and the second pressure signal, wherein the fourth pressure signal represents a real-time pressure value in the high-voltage connector collected from the second component.

4. The method according to claim 3, characterized in that The determining whether the internal and external pressures of the high-pressure connection system are in a balanced state based on the current pressure difference and the pressure monitoring signal includes: If the first pressure difference is zero, the third pressure signal is the same as the fourth pressure signal, and the second pressure difference is the same as the third pressure difference, it is determined that the internal and external pressures of the high-pressure connection system are in a balanced state; If the first pressure difference is zero and the third pressure signal is different from the fourth pressure signal, and / or if the first pressure difference is zero and the second pressure difference is different from the third pressure difference, it is determined that the internal and external pressures of the high-pressure connection system are in an unbalanced state.

5. The method according to claim 2, characterized in that: The step of determining whether the conductive electrode of the high voltage connection system is in a conductive state based on the conductive monitoring signal comprises: If the voltage value represented by the conductive monitoring signal is zero, it is determined that the conductive electrode of the high-voltage connection system is in a non-conductive state; If the voltage value represented by the conductive monitoring signal is not zero, it is determined that the conductive electrode of the high-voltage connection system is in a conductive state.

6. The method according to claim 1, characterized in that The method further comprises: Acquiring a temperature monitoring signal of the high-voltage connection system monitored by the monitoring system; An over-temperature fault detection result of the high voltage connection system is determined based on the temperature monitoring signal.

7. A fault detection device, characterized in that: The device comprises: A signal acquisition unit, used to acquire a conductive monitoring signal and a pressure monitoring signal of the high-voltage connection system monitored by the control system; The result determination unit is used to determine a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

8. A fault detection system, characterized in that: The fault detection system includes a monitoring system and a high voltage connection system. The high voltage connection system is used to send a conductive monitoring signal and a pressure monitoring signal to the monitoring system; The monitoring system is used to determine a water immersion fault detection result of the high-voltage connection system based on the conductive monitoring signal and the pressure monitoring signal.

9. A vehicle, characterized in that: The method comprises one or more processors and a memory; one or more programs are stored in the memory and are configured so that the one or more processors execute the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program code, wherein when the program code is executed by a processor, the method according to any one of claims 1 to 6 is executed.

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