Water inlet detection system, element, circuit and vehicle

Abstract

The utility model relates to a water inflow detection system, element and circuit and a vehicle. The system comprises a water inflow detection element and a water inflow detection circuit. The water inlet detection element is arranged corresponding to the element to be detected and is electrically connected with the water inlet detection circuit; and the water inlet detection circuit realizes water inlet detection of the to-be-detected element according to a detection signal of the water inlet detection element. According to the water inlet detection system provided by the invention, the water inlet detection element and the water inlet detection circuit are arranged, and the water inlet detection element corresponds to the to-be-detected element and is electrically connected with the water inlet detection circuit, so that the water inlet detection circuit can judge whether water enters the to-be-detected element according to the detection signal of the water inlet detection element to the to-be-detected element; and whether the to-be-detected element has a waterproof function at present can be judged according to the water inflow condition of the detection element.

Description

Technical Field

[0001] This application relates to the field of testing, and more particularly to a water ingress detection system, component, circuit, and vehicle. Background Technology

[0002] As user demands continue to rise, the issue of waterproofing failure in equipment components is becoming increasingly prominent. In certain scenarios, such as vehicles, water ingress into equipment components can lead to serious consequences, including electrical leakage, short circuits, and fires. Therefore, detecting water ingress into equipment components is crucial. However, related technologies primarily focus on improving the waterproofing rating of equipment components, neglecting the water ingress detection function.

[0003] Therefore, how to detect water ingress into equipment components has become a pressing technical problem for the industry. Utility Model Content

[0004] This application provides a water ingress detection system that can detect water ingress into equipment components, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a water ingress detection system is provided, including a water ingress detection element and a water ingress detection circuit;

[0006] The water inlet detection element is configured correspondingly to the element to be detected and is electrically connected to the water inlet detection circuit.

[0007] The water ingress detection circuit detects water ingress into the component under test based on the detection signal from the water ingress detection element.

[0008] According to a second aspect of this application, a water ingress detection element is provided. The water ingress detection element is ring-shaped, and is disposed correspondingly to a component to be detected and electrically connected to a water ingress detection circuit, so as to realize water ingress detection of the component to be detected based on the detection signal of the water ingress detection element.

[0009] According to a third aspect of this application, a water ingress detection circuit is also provided, wherein the water ingress detection circuit is electrically connected to a water ingress detection element and is used to detect water ingress into the element to be detected based on the detection signal of the water ingress detection element to the element to be detected corresponding to the water ingress detection element.

[0010] In summary, in this embodiment of the application, by setting a water ingress detection element and a water ingress detection circuit, the water ingress detection element is correspondingly set with the element to be detected and electrically connected to the water ingress detection circuit, so that the water ingress detection circuit can determine whether the element to be detected has water ingress based on the detection signal of the element to be detected by the water ingress detection element, and can also determine whether the element to be detected currently has waterproof function based on the water ingress status of the detection element.

[0011] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0014] Figure 1 This is one of the structural schematic diagrams of the water ingress detection system provided in the exemplary embodiments of this application;

[0015] Figure 2 This is a second schematic diagram of the structure of the water ingress detection system provided in the exemplary embodiments of this application;

[0016] Figure 3 This is one of the flowcharts illustrating the alarm method provided in the exemplary embodiments of this application;

[0017] Figure 4 This is the third schematic diagram of the structure of the water ingress detection system provided in the exemplary embodiments of this application;

[0018] Figure 5 This is a second schematic flowchart of the alarm method provided in the exemplary embodiments of this application;

[0019] Figure 6 This is a schematic diagram of the structure of the water ingress detection element provided in an exemplary embodiment of this application;

[0020] Figure 7 This is one of the schematic diagrams showing the positions of the water inlet detection element and the element to be detected provided in the exemplary embodiments of this application;

[0021] Figure 8 This is the second schematic diagram showing the positions of the water inlet detection element and the element to be detected in the exemplary embodiments of this application;

[0022] Figure 9 This is a schematic diagram of the structure of the water ingress detection circuit provided in an exemplary embodiment of this application;

[0023] Figure 10 This is the fourth schematic diagram of the structure of the water ingress detection system provided in the exemplary embodiments of this application;

[0024] Figure 11 This is a schematic diagram of the vehicle structure provided in an exemplary embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Water ingress detection system;

[0027] 11. Water ingress detection element; 111. Substrate; 112. Electrode; 113. Lead wire;

[0028] 12. Microcontroller;

[0029] 13. Water inlet detection circuit; 131. Voltage divider module; 132. Filtering module;

[0030] 14. Battery Management System;

[0031] 15. Control components;

[0032] 2. Component to be tested; 21. Component housing; 22. Pressure relief valve;

[0033] 3. Instruments;

[0034] 4. Vehicles. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0036] With the popularization of new energy vehicles, the problem of waterproof failure of high-voltage components in new energy vehicles is common. Water ingress into high-voltage components can cause new energy vehicles to leak electricity, break down, or even cause short circuits and fires. This problem has gradually become a focus and pain point of concern in the new energy vehicle industry. Moreover, as various OEMs have increased their requirements for the water wading capability of new energy vehicles, some OEMs have even produced vehicles with the ability to float in water. Therefore, the requirements for the waterproof performance of high-voltage components are becoming higher and higher.

[0037] Currently, to address the waterproofing failure issue of high-voltage components in new energy vehicles, OEMs primarily optimize by improving the protection level of these components from a sealing perspective, including optimizing sealing methods, sealing processes, and factory airtightness testing. However, the water ingress detection function for high-voltage components in new energy vehicles has been neglected. Therefore, this application provides a water ingress detection system, component, circuit, and vehicle from a water ingress detection perspective. The water ingress detection system, component, and circuit provided in this application can be used not only for water ingress detection of components in vehicles but also for water ingress detection of other components, and can also be used for testing the waterproofing performance of components; no limitation is made here.

[0038] Figure 1 This is one of the structural schematic diagrams of the water ingress detection system provided in the exemplary embodiments of this application, such as... Figure 1 As shown, the water ingress detection system 1 provided in this application embodiment includes a water ingress detection element 11 and a water ingress detection circuit 13;

[0039] The water inlet detection element 11 is configured correspondingly to the element to be detected 2 and is electrically connected to the water inlet detection circuit 13.

[0040] The water inlet detection circuit 13 detects the water inlet of the element to be detected 2 based on the detection signal from the water inlet detection element 11.

[0041] Specifically, the water ingress detection element 11 is a component used to sense changes in moisture or humidity and convert them into electrical signals.

[0042] The component to be tested, 2, is a device or component that needs to be assessed to determine if water ingress is currently present.

[0043] The water ingress detection circuit 13 is a circuit system that receives and processes detection signals from the water ingress detection element 11 to determine whether the element to be detected 2 is currently experiencing water ingress.

[0044] The detection signal is an electrical signal generated by the water inlet detection element 11 and transmitted to the water inlet detection circuit 13, used to reflect changes in the moisture or humidity of the element 2 to be detected.

[0045] The water ingress detection element 11 can be installed in the component 2 to be tested. For example, the water ingress detection element 11 can be installed at a weak point in the waterproofing of the component 2 to be tested or at the bottom of the component housing 21 of the component 2 to be tested, so as to detect in time whether the component 2 to be tested has been infiltrated by water. For example, the water ingress detection element 11 can be installed at a weak point in the waterproofing of the component 2 to be tested. When water enters the weak point in the waterproofing, the water can penetrate the water ingress detection element 11 immediately, so as to detect in time whether the component 2 to be tested has been infiltrated by water.

[0046] When the element under test 2 is in water and when it is not in water, the detection signal generated by the water ingress detection element 11 will be different. Therefore, the water ingress detection circuit 13 can determine the water ingress detection of the element under test 2 based on the received detection signal.

[0047] The water ingress detection circuit 13 and the water ingress detection element 11 can be electrically connected via a line. The water ingress detection circuit 13 can be integrated into the element to be detected 2 or placed outside the element to be detected 2; the specific location can be set according to the actual scenario.

[0048] Each water inlet detection element 11 can use a water inlet detection system 1 independently, or multiple water inlet detection elements 11 can share a water inlet detection system 1.

[0049] The water ingress detection system 1 provided in this application embodiment can also be used for waterproof testing of the component 2 to be tested. For example, the component 2 to be tested can be placed in water, and the water ingress detection system 1 can be used to detect whether water has entered the component 2, thereby determining whether the component 2 currently has waterproof function.

[0050] The water ingress detection system 1 provided in this application embodiment sets up a water ingress detection element 11 and a water ingress detection circuit 13. The water ingress detection element 11 is correspondingly set with the element to be detected 2 and electrically connected to the water ingress detection circuit 13. This allows the water ingress detection circuit 13 to determine whether the element to be detected 2 has water ingress based on the detection signal of the element to be detected 2 from the water ingress detection element 11, and also to determine whether the element to be detected 2 currently has waterproof function based on the water ingress status of the detection element.

[0051] It should be noted that each implementation method of this application can be freely combined, rearranged, or executed individually, and does not need to rely on or depend on a fixed execution order.

[0052] In some embodiments, there are multiple water inlet detection elements 11, and each water inlet detection element 11 is configured to correspond to a preset position of one of the elements 2 to be detected.

[0053] The water inlet detection element 11 includes a humidity-sensitive resistor.

[0054] The component to be tested 2 includes the high-pressure component of the vehicle 4, and the water ingress detection component 11 is located at the pressure relief valve 22 of the high-pressure component or at the bottom of the component housing 21.

[0055] Specifically, there can be multiple elements 2 to be detected, and multiple water inlet detection elements 11. Each water inlet detection element 11 can be set to correspond to a preset position of an element 2 to be detected.

[0056] The preset position can be a predetermined location where the water ingress detection element 11 will be installed in the element to be tested 2. The preset position can be a weak point in the waterproofing of the element to be tested 2 or the bottom of the element housing 21 of the element to be tested 2. The preset position can be set according to the actual situation.

[0057] The component to be tested 2 includes high-voltage components of vehicle 4, such as the battery pack and compressor of vehicle 4. The weak point in the waterproofing of the high-voltage component may be the pressure relief valve 22 or the bottom of the component housing 21.

[0058] The water ingress detection system 1 provided in this application improves detection efficiency by setting each water ingress detection element 11 to a preset position corresponding to a detection element 2. The water ingress detection element 11 corresponding to the detection element 2 can generate a detection signal in a timely manner.

[0059] In some embodiments, each of the water inlet detection elements 11 is electrically connected to the water inlet detection circuit 13 via a communication line. The water inlet detection elements 11 corresponding to different detection elements 2 are connected in parallel, and the water inlet detection circuit 13 is electrically connected to each of the water inlet detection elements 11.

[0060] The system further includes a battery management system 14; the water ingress detection circuit 13 is integrated in the battery management system 14 and is communicatively connected to the battery management system 14. The battery management system 14 determines whether the component to be detected 2 has water ingress based on the first signal sent by the water ingress detection circuit 13, and issues an alarm signal when water ingress is detected in the component to be detected 2. The first signal is generated based on the detection signal.

[0061] The system also includes a control element 15; the control element 15 is communicatively connected to the battery management system 14 and is used to control the instrument 3 to display alarms based on the alarm signal.

[0062] Specifically, in this embodiment of the application, there may be one water ingress detection circuit 13 and multiple water ingress detection elements 11. The water ingress detection circuit 13 is integrated into the battery management system 14 (BMS). The multiple water ingress detection elements 11 are connected in parallel and are respectively arranged at the corresponding positions of each element 2 to be detected.

[0063] When any of the components to be detected 2 is infiltrated by water, the detection signal from its corresponding water ingress detection element 11 is converted into a first signal by the water ingress detection circuit 13. The water ingress detection circuit 13 sends the first signal to the microcontroller unit (MCU). The MCU recognizes the first signal and sends it to the BMS. The BMS determines whether the component to be detected 2 has been infiltrated by water based on the first signal. If water has been infiltrated, the BMS sends an alarm signal for the component to be detected 2 to the control element 15. The control element 15 can be the vehicle control unit (VCU). The control element 15 recognizes the alarm signal and illuminates the instrument panel 3 of the vehicle 4 to remind the user that the component to be detected 2 has been infiltrated by water. The water ingress detection element 11 is electrically connected to the water ingress detection circuit 13 via a communication line, which is a newly added line between the water ingress detection element 11 and the water ingress detection circuit 13. The instrument panel 3 may or may not be part of the water ingress detection system 1.

[0064] The alarm signal is used to indicate that water has entered the component under test 2 and to trigger the instrument panel 3 of the vehicle 4 to illuminate in order to remind the user.

[0065] Figure 2This is a second schematic diagram of the structure of the water ingress detection system provided in an exemplary embodiment of this application. Figure 2 The water ingress detection element 11 is a humidity-sensitive resistor, and the element to be detected 2 is a high-voltage component of the vehicle 4, including the battery pack, compressor, electronic control system, positive temperature coefficient heater (PTC), and onboard charger (OBC). Each water ingress detection element 11 is located in a vulnerable waterproof area inside the housing 21 of the external high-voltage components such as the battery pack, compressor, electronic control system, PTC, and OBC. Each water ingress detection element 11 is connected in parallel to the water ingress detection circuit 13, which is integrated into the BMS.

[0066] When any of the high-voltage components, such as the battery pack, compressor, electronic control, PTC, and OBC, are infiltrated by water, the water enters the ingress humidity-sensitive resistor, causing its resistance to decrease. Due to the parallel connection of the water ingress detection element 11, the resistance of the humidity-sensitive resistor branch in the water ingress detection circuit 13 decreases, reducing the voltage drop. Consequently, the voltage drop across the resistor connected in series with the humidity-sensitive resistor in the water ingress detection circuit 13 increases, resulting in a high-level signal being output from the water ingress detection circuit 13 to the MCU. After the BMS recognizes the high-level signal output by the water ingress detection circuit 13, it sends a high-voltage component alarm signal to the VCU. Upon receiving the high-voltage component alarm signal, the VCU illuminates the instrument panel 3 and alerts the user that the high-voltage system of vehicle 4 has a water ingress fault, guiding the user to move vehicle 4 away from the water.

[0067] Figure 3 This is a flowchart illustrating one of the exemplary embodiments of the alarm method provided in this application; such as Figure 3 As shown, after water enters the high-pressure component, the resistance of the humidity-sensitive resistor decreases, and the water ingress detection circuit 13 outputs a high-level signal to the BMS. After the BMS recognizes the signal, it sends an alarm signal for the high-pressure component to the VCU. The VCU illuminates the instrument panel 3 and displays that the high-pressure system of the vehicle 4 has a water ingress fault.

[0068] The water ingress detection system 1 provided in this application embodiment only requires one water ingress detection circuit 13 integrated into the BMS to perform water ingress detection on the component to be detected 2. It can also issue an alarm when water enters the component to be detected 2. This is of great significance for detecting the floating water conditions of new energy vehicles. It can ensure that after water enters the high-voltage components of the vehicle 4, the user is promptly reminded that the high-voltage components have a water ingress fault. Before the high-voltage components fail due to water ingress, the user is guided to drive the vehicle 4 out of the water area.

[0069] In some embodiments, there are multiple water inlet detection circuits 13, each of which is electrically connected to one water inlet detection element 11. The number of water inlet detection circuits 13 corresponds to the number of elements 2 to be detected. The water inlet detection circuits 13 are disposed in the elements 2 to be detected.

[0070] The system also includes a control element 15; each of the water inlet detection circuits 13 is communicatively connected to the control element 15 via a communication bus.

[0071] The control element 15 is used to determine whether water has entered the element 2 to be detected based on the second signal sent by each of the water inlet detection circuits 13, and to issue an alarm signal when water inlet is detected in the element 2 to be detected, wherein the second signal is generated based on the detection signal.

[0072] The system also includes a control element 15; the control element 15 is communicatively connected to the water inlet detection circuit 13 and is used to control the instrument 3 to display an alarm based on the alarm signal.

[0073] Specifically, in this application embodiment, there can be multiple water ingress detection circuits 13, each integrated into multiple components 2 to be detected. The water ingress detection system 1 in this application embodiment also includes a control element 15; the control element 15 is communicatively connected to the water ingress detection circuits 13 via a communication bus. The communication bus can be a Controller Area Network (CAN) bus.

[0074] When any of the tested components 2 is infiltrated by water, the detection signal of its corresponding water ingress detection component 11 will be converted into a second signal by the water ingress detection circuit 13. The water ingress detection circuit 13 will send the second signal to the MCU. After the MCU recognizes the second signal, it will determine whether the tested component 2 has been infiltrated by water. If water is infiltrated, the MCU will upload an alarm signal to the CAN bus. The alarm signal will be sent to the control component 15 via the CAN bus. After the control component 15 recognizes the alarm signal of the tested component 2, it will light up the instrument 3 to remind the user of the water ingress fault of the tested component 2.

[0075] Figure 4 This is the third schematic diagram of the structure of the water ingress detection system provided in the exemplary embodiments of this application. Figure 4 The water ingress detection element 11 is a humidity-sensitive resistor, and the element to be detected 2 is a high-voltage component of the vehicle 4, including the battery pack, compressor, electronic control, positive temperature coefficient heater (PTC), and onboard charger (OBC) of the vehicle 4.

[0076] When water enters any of the high-voltage components, the water intrudes into the humidity-sensitive resistor, causing its resistance value to decrease. This leads to a decrease in the resistance value of the humidity-sensitive resistor Rs in the water ingress detection circuit 13, resulting in a decrease in the voltage drop across the humidity-sensitive resistor branch. Consequently, the voltage drop across the resistor connected in series with the humidity-sensitive resistor in the water ingress detection circuit 13 increases. This causes the second signal output by the water ingress detection circuit 13 to the MCU to be a high-level signal. The MCU then generates an alarm signal for the high-voltage component, which is sent to the VCU via the CAN bus. Upon receiving the alarm signal, the VCU illuminates the instrument panel 3 and alerts the user that the high-voltage system of vehicle 4 has experienced a water ingress fault, guiding the user to move vehicle 4 away from the water.

[0077] Figure 5 This is a second schematic flowchart of the alarm method provided in the exemplary embodiments of this application; such as Figure 5 As shown, after water enters the high-pressure component, the resistance of the humidity-sensitive resistor decreases, and the water ingress detection circuit 13 outputs a high-level signal to the MCU. The MCU uploads the alarm signal to the CAN bus, and the CAN bus transmits the alarm signal to the VCU. The VCU recognizes the alarm signal of the high-pressure component, lights up the instrument panel 3, and displays that the high-pressure component of the vehicle 4 has a water ingress fault.

[0078] The water ingress detection system 1 provided in this application integrates a water ingress detection circuit 13 in each element to be detected 2, eliminating the need for additional hard wiring. It can transmit alarm signals using a CAN bus and can also locate the element to be detected that has ingressed water and the element to be detected that has failed to waterproof.

[0079] The water ingress detection element 11 provided in the embodiments of this application is described below. The water ingress detection element 11 described below can be referred to in correspondence with the water ingress detection element 11 in the water ingress detection system 1 described above.

[0080] Figure 6 This is a schematic diagram of the structure of the water ingress detection element provided in an exemplary embodiment of this application; Figure 7 This is one of the exemplary embodiments of the present application, showing the positions of the water inlet detection element and the element to be detected. Figure 7 The diagram on the right, drawn out by the dashed line, is a partially enlarged schematic of the high-voltage component's inlet line. Figure 8 This is the second schematic diagram showing the positions of the water inlet detection element and the element to be detected in the exemplary embodiments of this application. Figure 8 The diagram on the right, drawn out by the dashed line, is a partially enlarged view of the pressure relief valve at point 22 of the high-pressure component. Figure 7 and Figure 8 The component to be tested, 2, is a high-voltage component of vehicle 4. For example... Figures 6 to 8As shown, the water inlet detection element 11 is ring-shaped. The water inlet detection element 11 is correspondingly arranged with the element to be detected 2 and is electrically connected to the water inlet detection circuit 13 so as to realize the water inlet detection of the element to be detected 2 according to the detection signal of the water inlet detection element 11.

[0081] Specifically, in this embodiment, the water ingress detection element 11 can be a humidity-sensitive resistor. A humidity-sensitive resistor has the characteristic that its resistance changes when it absorbs moisture. In this embodiment, the humidity-sensitive resistor structure is ring-shaped, and the ring-shaped humidity-sensitive resistor can be assembled into, for example... Figure 7 The high-voltage component's inlet and as shown Figure 8 The pressure relief valve 22 of the high-voltage component is designed so that when the waterproof seal of the high-voltage component fails and water enters, water will immediately invade the annular humidity-sensitive resistor, thereby reducing the resistance value of the annular humidity-sensitive resistor.

[0082] Alternatively, the humidity sensor can be placed at the bottom of the high-voltage component housing 21 or at other locations with weak seals, and a humidity sensor designed for such locations can be used. When the humidity sensor is placed at a weak seal location, it is easier to detect water ingress into the component 2, regardless of the direction of the water flow.

[0083] The water ingress detection element 11 provided in this application embodiment is configured with a ring-shaped water ingress detection element 11 and a water ingress detection circuit 13. The water ingress detection element 11 is correspondingly configured with the element to be detected 2 and electrically connected to the water ingress detection circuit 13. This allows the water ingress detection circuit 13 to determine whether the element to be detected 2 has water ingress based on the detection signal of the element to be detected 2 from the water ingress detection element 11, and also to determine whether the element to be detected 2 currently has waterproof function based on the water ingress status of the detection element.

[0084] like Figure 6 As shown, the humidity-sensitive resistor includes an annular substrate 111, an electrode 112 disposed on the surface of the substrate 111, and a lead wire 113 disposed on the electrode 112.

[0085] Specifically, the substrate 111 can be a magnesium chromate-titanium dioxide ceramic substrate 111. The humidity sensor based on the magnesium chromate-titanium dioxide ceramic substrate 111 can detect a wide humidity range and can be used below the dew point. The lead wire 113 can be connected to the water inlet detection circuit 13.

[0086] Dew point refers to the temperature at which the gaseous water in the air must condense into liquid water to reach saturation under a fixed atmospheric pressure. Therefore, a humidity-sensitive resistor with a magnesium chromate-titanium dioxide ceramic substrate 111 can accurately measure humidity in environments ranging from very dry to very humid, and it can also function normally in low-temperature, high-humidity environments (i.e., temperatures below the dew point).

[0087] Electrode 112 can be a ruthenium dioxide electrode 112 printed on the surface of ceramic substrate 111.

[0088] The water ingress detection element 11 provided in this application embodiment constructs a ring-shaped humidity-sensitive resistor by setting a ring-shaped substrate 111. The ring structure increases the effective surface area of ​​the humidity-sensitive resistor, thereby increasing the area in contact with the ambient humidity, which can improve the sensitivity and response speed of the humidity-sensitive resistor.

[0089] The water ingress detection circuit 13 provided in the embodiments of this application is described below. The water ingress detection circuit 13 described below can be referred to in correspondence with the water ingress detection circuit 13 in the water ingress detection system 1 described above.

[0090] The water inlet detection circuit 13 provided in this application embodiment is electrically connected to the water inlet detection element 11, and is used to detect the water inlet of the element 2 to be detected according to the detection signal of the element 2 to be detected corresponding to the water inlet detection element 11.

[0091] Specifically, the water ingress detection circuit 13 can output a low-level signal or a high-level signal to the MCU according to the water ingress status of the component 2 under test. When the high-voltage component is not ingressed with water, the resistance value of the humidity-sensitive resistor is normal, and the water ingress detection circuit 13 inputs a low-level signal to the MCU. When the component 2 under test is ingressed with water, the resistance value of the humidity-sensitive resistor decreases, and the water ingress detection circuit 13 inputs a low-level signal to the MCU.

[0092] The water ingress detection circuit 13 provided in this application embodiment electrically connects the water ingress detection element 11 and the water ingress detection circuit 13, so that the water ingress detection circuit 13 can determine whether the element to be detected 2 has water ingress based on the detection signal of the element to be detected 2 from the water ingress detection element 11, and can also determine whether the element to be detected 2 currently has waterproof function based on the water ingress status of the detection element.

[0093] Figure 9 This is a schematic diagram of the structure of the water ingress detection circuit provided in an exemplary embodiment of this application, such as... Figure 9 As shown, the water inlet detection circuit 13 includes a voltage divider module 131 and a filter module 132;

[0094] The water inlet detection element 11 is connected to the pressure divider module 131;

[0095] The output terminal of the voltage divider module 131 is connected to the input terminal of the filter module 132;

[0096] The output terminal of the filtering module 132 is connected to the signal acquisition module;

[0097] The input terminal of the signal generation module is connected to the microcontroller 12 of the water inlet detection system 1.

[0098] The voltage divider module 131 includes a resistor connected in series with the water inlet detection element 11 and a resistor connected in parallel with the water inlet detection element 11; the voltage divider module 131 is used to convert the detection signal into a voltage signal.

[0099] The filtering module 132 includes resistors and capacitors for filtering the voltage signal.

[0100] Specifically, Figure 10 This is the fourth schematic diagram of the structure of the water ingress detection system 1 provided in the exemplary embodiment of this application. Figure 10 The water inlet detection element 11 is a humidity-sensitive resistor RS. For example... Figure 10 As shown, the voltage divider module 131 includes resistors R1, R2, and R3. Resistor R1 is connected in series with the humidity-sensitive resistor RS, and resistor R2 is connected in parallel with the humidity-sensitive resistor RS. The filter module 132 includes resistor R4 and capacitor C1. Resistor R4 and capacitor C1 are connected to the MCU's AD1 interface. One end of capacitor C1 can be grounded.

[0101] The water ingress detection circuit 13 is connected to the MCU through the MCU's Analog-to-Digital (AD) interface and Input / Output (IO) interface.

[0102] Resistor R2 is connected in parallel with humidity sensor RS, and resistor R1 is connected in series with humidity sensor RS. This ensures a smooth resistance change in the series-parallel branch formed by R1, R2, and the humidity sensor. Resistor R3 acts as a voltage divider, and resistor R4 and capacitor C1 act as filters, resulting in smooth sampling. The MCU's IO1 and IO2 interfaces output 1kHz square waves with opposite phases. When IO1 receives a high-level signal, IO2 receives a low-level signal, and vice versa, simulating AC input. The MCU's AD1 interface acquires the voltage signal filtered by resistor R4 and capacitor C1.

[0103] When the humidity sensor is not immersed in water, the resistance of the humidity sensor RS is relatively large, the voltage drop across resistor R3 is small, and the AD1 interface receives a low-level signal. After the humidity sensor RS is immersed in water, the resistance of the humidity sensor Rs decreases, the voltage drop across resistor R3 increases, and the AD1 interface receives a high-level signal.

[0104] The water ingress detection circuit 13 provided in this embodiment can output a signal to the MCU to realize water ingress detection of the component 2 to be detected, thereby improving the detection efficiency.

[0105] Figure 11 This is a schematic diagram of the vehicle structure provided in an exemplary embodiment of this application, such as... Figure 11As shown, the vehicle 4 includes the component to be detected 2 and the aforementioned water ingress detection system 1. In this embodiment, the vehicle 4 can be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not specifically limit it.

[0106] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0107] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0108] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0109] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A water ingress detection system, characterized in that, Includes water ingress detection elements and water ingress detection circuits; The water inlet detection element is configured correspondingly to the element to be detected and is electrically connected to the water inlet detection circuit. The water ingress detection circuit detects water ingress into the component under test based on the detection signal from the water ingress detection element.

2. The system according to claim 1, characterized in that, There are multiple water inlet detection elements, and each water inlet detection element is set at a preset position corresponding to one of the elements to be detected.

3. The system according to claim 2, characterized in that, Each of the water inlet detection elements is electrically connected to the water inlet detection circuit via a communication line.

4. The system according to claim 3, characterized in that, The water inlet detection elements corresponding to different elements to be detected are connected in parallel, and the water inlet detection circuit is electrically connected to each of the water inlet detection elements.

5. The system according to claim 3, characterized in that, The system also includes a battery management system; the water ingress detection circuit is integrated into the battery management system and is communicatively connected to the battery management system. The battery management system determines whether the component under test has been infiltrated by water based on the first signal sent by the water ingress detection circuit, and issues an alarm signal when water ingress is detected in the component under test. The first signal is generated based on the detection signal.

6. The system according to claim 5, characterized in that, The system also includes a control element; the control element is communicatively connected to the battery management system and is used to control the instrument to display alarms based on the alarm signal.

7. The system according to claim 3, characterized in that, The communication line is a newly added line between the water inlet detection element and the water inlet detection circuit.

8. The system according to claim 2, characterized in that, There are multiple water inlet detection circuits, and each water inlet detection circuit is electrically connected to one water inlet detection element.

9. The system according to claim 8, characterized in that, The number of water inlet detection circuits corresponds to the number of the components to be detected.

10. The system according to claim 8, characterized in that, The water ingress detection circuit is located in the element to be detected.

11. The system according to claim 10, characterized in that, The system also includes a control element; each of the water inlet detection circuits is communicatively connected to the control element via a communication bus. The control element is used to determine whether water has entered the element to be detected based on the second signal sent by each of the water inlet detection circuits, and to issue an alarm signal when water inlet is detected in the element to be detected. The second signal is generated based on the detection signal.

12. The system according to claim 11, characterized in that, The system also includes a control element; the control element is communicatively connected to the water inlet detection circuit and is used to control the instrument to display an alarm based on the alarm signal.

13. The system according to claim 11, characterized in that, The communication bus is a CAN bus.

14. The system according to any one of claims 1 to 13, characterized in that, The water inlet detection element includes a humidity-sensitive resistor.

15. The system according to any one of claims 1 to 13, characterized in that, The component to be tested includes a high-pressure component of the vehicle, and the water ingress detection component is located at the pressure relief valve of the high-pressure component.

16. The system according to any one of claims 1 to 13, characterized in that, The component to be tested includes a high-voltage component of the vehicle, and the water ingress detection component is disposed at the bottom of the component housing of the high-voltage component.

17. A water ingress detection element, characterized in that, The water inlet detection element is ring-shaped and is correspondingly arranged with the element to be detected. It is electrically connected to the water inlet detection circuit so as to realize the water inlet detection of the element to be detected according to the detection signal of the water inlet detection element.

18. The water inlet detection element according to claim 17, characterized in that, The water inlet detection element is a humidity-sensitive resistor.

19. The water inlet detection element according to claim 18, characterized in that, The humidity-sensitive resistor includes an annular substrate, an electrode disposed on the surface of the substrate, and a lead wire disposed on the electrode.

20. A water ingress detection circuit, characterized in that, The water inlet detection circuit is electrically connected to the water inlet detection element and is used to detect the water inlet of the element to be detected based on the detection signal of the water inlet detection element to the element to be detected corresponding to the water inlet detection element.

21. The circuit according to claim 20, characterized in that, The water inlet detection circuit includes a voltage divider module and a filter module; The water inlet detection element is connected to the pressure divider module; The output terminal of the voltage divider module is connected to the input terminal of the filter module; The output of the filtering module is connected to the microcontroller of the water inlet detection system.

22. The circuit according to claim 21, characterized in that, The voltage divider module includes a resistor connected in series with the water inlet detection element and a resistor connected in parallel with the water inlet detection element; the voltage divider module is used to convert the detection signal into a voltage signal.

23. The circuit according to claim 22, characterized in that, The filtering module includes a resistor and a capacitor connected in series, used to filter the voltage signal.

24. A vehicle, characterized in that, It includes the element to be detected, and the water ingress detection system as described in any one of claims 1 to 16.

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