Water inlet detection method, device and equipment of electrical connection equipment and storage medium

Abstract

The application is suitable for the technical field of intelligent detection of electrical connection equipment, and provides a water inlet detection method, device and equipment of electrical connection equipment and a storage medium. The method comprises the following steps: acquiring a detection voltage of a signal terminal in the electrical connection equipment under the condition that the electrical connection equipment is in a powered-on state; wherein the electrical connection equipment comprises a power terminal and a signal terminal, the power terminal is used for outputting a power supply voltage, the power terminal and the signal terminal form an equivalent voltage division circuit under a water inlet state, and the equivalent voltage division circuit is used for generating the detection voltage of the signal terminal under the action of the power supply voltage; and determining a water inlet state of the electrical connection equipment according to the detection voltage. By using the method, low-cost water inlet detection of the electrical connection equipment can be realized.

Description

Technical Field

[0001] This application belongs to the field of intelligent detection technology for electrical connection equipment, and particularly relates to a method, device, equipment and storage medium for detecting water ingress into electrical connection equipment. Background Technology

[0002] With the booming development of electric bicycles, their safety and reliability have increasingly become a focus of industry attention. As a crucial hub for power transmission and signal interaction in electric bicycles, the protective performance of electrical connection equipment (such as battery pack connectors) directly affects the overall operational safety of the vehicle. After the vehicle has been driven through water, washed, or used in a prolonged humid environment, liquid intrusion into the connector cavity can lead to serious consequences such as decreased insulation performance, contact corrosion, signal misinterpretation, and even short circuits and fires. Therefore, effective water ingress monitoring of electrical connection equipment has become an indispensable and critical step in ensuring the safety of the battery system throughout its entire lifecycle.

[0003] Currently, traditional technologies for detecting water ingress in electrical connection equipment typically rely on adding dedicated detection components. For example, a common approach is to place a separate leak detection probe inside the cavity of the electrical connection equipment to determine whether water has entered.

[0004] However, the existing methods described above require additional physical detection elements. The leak detection probe needs to occupy the interface pin resources of the connector independently, which increases the number of wire harnesses and assembly steps, significantly increasing hardware and assembly costs.

[0005] Therefore, it is necessary to provide a new water ingress detection solution for electrical connection equipment to overcome the high cost of the existing technology. Summary of the Invention

[0006] This application provides a method, apparatus, device, and storage medium for detecting water ingress into electrical connection equipment, enabling low-cost water ingress detection of electrical connection equipment.

[0007] In a first aspect, embodiments of this application provide a method for detecting water ingress into an electrical connection device, comprising: When the electrical connection equipment is powered on, the detection voltage of the signal terminal in the electrical connection equipment is obtained; wherein, the electrical connection equipment includes a power terminal and a signal terminal, the power terminal is used to output the power supply voltage, and the power terminal and the signal terminal form an equivalent voltage divider circuit in the water inlet state, the equivalent voltage divider circuit is used to make the signal terminal generate a detection voltage under the action of the power supply voltage; The water ingress status of the electrical connection equipment is determined based on the detected voltage.

[0008] In one possible implementation of the first aspect, obtaining the detection voltage of the signal terminal in the electrical connection device includes: disconnecting the internal electrical connection between the target functional module and the signal terminal; the target functional module refers to the module that drives or biases the signal terminal before disconnecting the internal electrical connection with the signal terminal; and obtaining the detection voltage of the signal terminal in the electrical connection device after disconnecting the internal electrical connection.

[0009] In one possible implementation of the first aspect, the target functional module includes a communication module; disconnecting the internal electrical connection between the target functional module and the signal terminal includes: controlling the communication module to disconnect its internal pull-up resistors and / or pull-down resistors from the connection between the communication module and the signal terminal.

[0010] In one possible implementation of the first aspect, determining the water ingress status of the electrical connection equipment based on the detection voltage includes: determining the equivalent resistance between the power terminal and the signal terminal based on the supply voltage, the detection voltage, and the preset voltage divider resistor; and determining the water ingress status based on the equivalent resistance.

[0011] In one possible implementation of the first aspect, determining the equivalent resistance between the power terminal and the signal terminal based on the supply voltage, the detection voltage, and the preset voltage divider resistor includes: multiplying the supply voltage and the preset voltage divider resistor to obtain a product value; dividing the product value and the detection voltage to obtain a quotient value; and determining the equivalent resistance between the power terminal and the signal terminal based on the difference between the quotient value and the preset voltage divider resistor.

[0012] In one possible implementation of the first aspect, when the water ingress condition is water ingress into the electrical connection device, the method further includes: implementing a graded protection strategy according to the severity of the water ingress into the electrical connection device; the graded protection strategy includes at least one of limiting the usage time of the load device connected to the electrical connection device, issuing an alarm message, or disconnecting a power switch.

[0013] In one possible implementation of the first aspect, a graded protection strategy is executed according to the severity of water ingress into the electrical connection equipment, including: when the detected voltage is within a first preset voltage range, determining the severity of water ingress into the electrical connection equipment as a first-level fault, limiting the first usage time of the load equipment, and issuing a first alarm message; when the detected voltage is within a second preset voltage range, determining the severity of water ingress into the electrical connection equipment as a second-level fault, limiting the second usage time of the load equipment, and issuing a second alarm message; when the detected voltage is within a third preset voltage range, determining the severity of water ingress into the electrical connection equipment as a third-level fault, issuing a third alarm message, and disconnecting the power switch; wherein, the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range, the upper limit of the second preset voltage range is less than the lower limit of the third preset voltage range, and the first usage time is greater than the second usage time.

[0014] Secondly, embodiments of this application provide a water ingress detection device for electrical connection equipment, comprising: The voltage acquisition module is used to acquire the detection voltage of the signal terminals in the electrical connection equipment when the electrical connection equipment is powered on. The electrical connection equipment includes power terminals and signal terminals. The power terminals are used to output the supply voltage. The power terminals and signal terminals form an equivalent voltage divider circuit in the water inlet state. The equivalent voltage divider circuit is used to generate a detection voltage in the signal terminals under the action of the supply voltage. The detection module is used to determine the water ingress status of electrical connection equipment based on the detection voltage.

[0015] Thirdly, embodiments of this application provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the water ingress detection method for any of the above-mentioned electrical connection devices.

[0016] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the water ingress detection method for any of the above-mentioned electrical connection devices.

[0017] Fifthly, embodiments of this application provide a computer program product that, when run on a terminal device, causes the terminal device to execute the water ingress detection method for electrical connection devices described in any of the first aspects above.

[0018] The beneficial effects of the embodiments of this application compared with the prior art are: This application provides a method, apparatus, device, and storage medium for detecting water ingress in an electrical connection device. This method achieves low-cost water ingress detection by reusing existing power terminals and signal terminals in the electrical connection device. Specifically, when the power switch of the electrical connection device is in the ON state, the power terminal outputs a supply voltage. Based on this, the detection voltage of the signal terminal is obtained. This signal terminal is an existing terminal in the electrical connection device originally used for communication or signal acquisition, eliminating the need for additional dedicated probes and thus saving material and assembly costs associated with dedicated probes and their associated fixing structures, sealing structures, and wire harness connectors. Furthermore, when water enters the cavity of the electrical connection device, the water acts as a conductive medium, forming an equivalent voltage divider circuit between the power terminal and the signal terminal. This equivalent voltage divider circuit, under the influence of the supply voltage, causes the signal terminal to generate a shifted detection voltage. Utilizing the electrical phenomena formed after water ingress, the power terminal, originally used only for power transmission, and the signal terminal, originally used only for communication, are constructed as key components of the detection circuit, without the need for any additional detection elements. When water is not present, the signal terminals and power terminals are air-insulated, resulting in an equivalent resistance approaching infinity. The supply voltage to the power terminals cannot form an effective voltage component on the signal terminals, and the signal terminal voltage remains within a preset normal level range. However, when water is present, the water acts as a conductive medium, creating a finite and definite equivalent resistance between the power terminals and signal terminals. The supply voltage, through this equivalent voltage divider circuit, generates a detectable voltage shift on the signal terminals. A clear and distinguishable voltage difference exists between the two. Therefore, the water ingress status of the electrical connection equipment can be accurately determined based on the detected voltage. This judgment process requires only simple voltage comparison logic, without the need for complex signal processing modules or high-frequency injection devices. In summary, this method achieves low-cost water ingress detection of electrical connection equipment by reusing existing terminals of the electrical connection equipment, utilizing the equivalent voltage divider circuit formed by water ingress, and requiring only voltage detection. This fundamentally overcomes the high cost of existing technologies that require additional dedicated detection components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.

[0020] Figure 1 This is a flowchart illustrating a water ingress detection method for an electrical connection device provided in this application; Figure 2 This is a schematic diagram of a process for obtaining a detection voltage provided in this application; Figure 3 This is a schematic diagram of a process for determining the water inlet status provided in this application; Figure 4 This is a schematic diagram of a process for determining the equivalent resistance provided in this application; Figure 5 This is a structural schematic diagram of a water ingress detection device provided in this application; Figure 6 This is a schematic diagram of the structure of a water ingress detection device for an electrical connection device provided in this application; Figure 7 This is a schematic diagram of the structure of a computer device provided in this application. Detailed Implementation

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0022] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0023] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0025] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] In traditional water ingress detection technologies for electrical connection equipment, the addition of dedicated detection components significantly increases hardware and assembly costs. This problem stems from the fact that the leak detection probe requires independent access to the interface pins of the electrical connection equipment, increasing the number of wiring harnesses and assembly steps.

[0028] For example, in scenarios involving the washing or wading of connectors in electric bicycle battery packs, liquid may seep into the connector cavity. Furthermore, traditional solutions require additional leakage detection probes within the connector cavity of the battery pack. These probes connect to the control system via a dedicated interface, occupying pin resources originally intended for signal transmission. This leads to increased wiring harness branches and more complex assembly processes, increasing both hardware and assembly costs. Additionally, it extends the production cycle and negatively impacts the reliability of electrical connections, specifically manifesting as pin resource shortages and decreased assembly consistency.

[0029] If these issues are not addressed, electrical connection equipment may fail to detect liquid ingress in a timely manner when water enters the system, leading to technical consequences such as decreased insulation performance, contact corrosion, signal misinterpretation, and short circuits causing fires. This problem poses a continuous threat to the safety and operational stability of the battery system, thereby affecting the overall safety assurance capabilities of the vehicle throughout its entire lifecycle.

[0030] In one exemplary embodiment, a method for detecting water ingress into an electrical connection device is provided, such as... Figure 1 As shown, it includes: S101: When the electrical connection device is powered on, acquire the detection voltage of the signal terminal in the electrical connection device.

[0031] The electrical connection equipment includes power terminals and signal terminals. The power terminals are used to output the power supply voltage. The power terminals and signal terminals form an equivalent voltage divider circuit in the water inlet state. The equivalent voltage divider circuit is used to generate a detection voltage at the signal terminals under the action of the power supply voltage.

[0032] Electrical connection equipment refers to devices used to realize the transmission of electrical energy and / or the exchange of signals in an electrical system. For example, in the field of electric bicycles, electrical connection equipment can refer to connectors for battery packs, high-voltage connectors, etc., whose function is to connect different electrical modules and ensure the normal flow of current and signals.

[0033] A signal terminal is an existing terminal in an electrical connection device originally used for communication or signal acquisition. It refers to the pins or interfaces in the electrical connection device used for signal transmission. Under normal operating conditions, signal terminals carry control signals, data signals, etc. In this embodiment, the signal terminal is also used to detect water ingress.

[0034] A power terminal is an existing terminal in an electrical connection device that was originally used for power supply. It refers to the pin or interface in the electrical connection device used to output the power supply voltage. This power supply voltage can be the main power supply voltage of the electrical system, such as battery voltage.

[0035] Supply voltage refers to the voltage output from the power terminals that provides operating energy to electrically connected equipment or its connection modules.

[0036] An equivalent voltage divider circuit refers to a resistive path formed between power terminals and signal terminals when water enters an electrical connection device, acting as a conductive medium. This resistive path, together with the equivalent resistance inside or outside the signal terminals, constitutes a voltage divider circuit, causing the supply voltage to be divided across this circuit.

[0037] The detection voltage refers to the voltage generated on the signal terminal after the equivalent voltage divider circuit is formed. This detection voltage is the result of the supply voltage being divided by the equivalent voltage divider circuit, and its magnitude is related to the degree of water ingress, the conductivity of the water, and the resistance values ​​of other components in the circuit.

[0038] After the electrical connection device is powered on, the power terminals can output a supply voltage to power the subsequent equivalent voltage divider circuit. Based on this, the detection voltage of the signal terminals in the electrical connection device is obtained. For example, an analog-to-digital converter can be used to sample the voltage on the signal terminals to obtain the detection voltage. In one implementation, voltage measurement can be performed during idle periods when the signal terminals are not used for signal transmission to avoid interference with normal signal transmission. In another implementation, a bypass circuit can be designed to periodically measure the voltage of the signal terminals without affecting their normal function. For example, a high-impedance voltmeter or analog-to-digital converter input can be connected to the signal terminals, allowing direct reading of the voltage value on the signal terminals when the power switch is on, thus obtaining the detection voltage.

[0039] The multiplexed electrical connection device includes a power terminal and a signal terminal, with the power terminal used to output the supply voltage. When water enters the electrical connection device, the infiltrating liquid forms a conductive path between the power terminal and the signal terminal. This conductive path, together with the internal circuitry connected to the signal terminal (e.g., the input impedance of the signal terminal itself or the resistance of other modules connected to the signal terminal), forms an equivalent voltage divider circuit. Under the influence of the supply voltage, this equivalent voltage divider circuit causes the signal terminal to generate a detection voltage. For example, if the power terminal outputs a 12V supply voltage, when water enters and forms a path with an equivalent resistance of R_water between the power terminal and the signal terminal, if there is an internal resistor R_signal connected to ground in the signal terminal, the 12V voltage will be divided by R_water and R_signal, and the voltage on the signal terminal is the detection voltage. The stronger the conductivity of the water or the larger the water volume, the smaller the resistance of R_water, and thus the detection voltage will change accordingly.

[0040] As an optional implementation, the electrical connection device can be powered on by closing a power switch in the load device connected to the electrical connection device. Specifically, the load device can be a battery pack, the electrical connection device can be a connector mounted on the battery pack, and the power switch can be a relay located inside the battery pack. The battery pack contains battery cells, and the positive terminals of the battery cells are connected to the power terminals of the electrical connection device sequentially via a relay and a high-voltage wiring harness. When power is required on the electrical connection device, the battery management system controls the relay to close, creating a low-impedance conduction path between the positive terminal of the battery cell and the power terminal. The supply voltage output by the battery cell is applied to the power terminal through this conduction path, and the electrical connection device is then powered on.

[0041] S102, determine the water inlet status of the electrical connection equipment based on the detected voltage.

[0042] The term "water ingress status" refers to whether liquid has entered the internal structure of the electrical connection equipment. Water ingress status includes both internal water ingress and non-internal water ingress. The severity of water ingress can also be differentiated based on the magnitude of the detection voltage.

[0043] After acquiring the detected voltage at the signal terminal, the water ingress status of the electrical connection equipment can be determined through preset judgment logic. For example, one or more preset thresholds can be preset. When the detected voltage exceeds a certain preset threshold, it is determined that water has entered the electrical connection equipment. For example, a low threshold V_low and a high threshold V_high can be set. If the detected voltage is not greater than V_low, the water ingress status of the electrical connection equipment is determined to be that there is no water inside the electrical connection equipment; if the detected voltage is higher than V_low, the water ingress status of the electrical connection equipment is determined to be that there is water inside the electrical connection equipment; if the detected voltage is higher than V_low but lower than V_high, the water ingress status of the electrical connection equipment is determined to be slight; if the detected voltage is higher than V_high, the water ingress status of the electrical connection equipment is determined to be severe. This judgment method based on preset thresholds can convert the analog voltage signal into discrete water ingress status information.

[0044] The following example will provide a more detailed explanation of the above technical solution: Suppose we need to detect water ingress in the connector of an electric bicycle's battery pack. This connector includes a power terminal for outputting a 12V supply voltage and a signal terminal, typically used to transmit control signals. During normal vehicle operation, the Battery Management System (BMS) ensures the connector's power switch is on, thus applying the 12V supply voltage to the power terminal. To detect water ingress, the system can periodically sample the detection voltage at the signal terminal using an analog-to-digital converter. For example, sampling could be performed every 100 milliseconds.

[0045] When a vehicle is driving through flooded areas or during a car wash, a small amount of water droplets may enter the connector cavity of the battery pack. These water droplets form a conductive path between the power terminals and the signal terminals. Since water has some conductivity, this conductive path can be considered an equivalent resistance. This resistance, together with the resistance inside the signal terminal connected to ground, forms a voltage divider circuit. For example, if the power terminal outputs 12V, the internal resistance of the signal terminal is 10kΩ, and the equivalent resistance of the conductive path formed by the water is 100kΩ, then the detected voltage on the signal terminal will be 12V * (10kΩ / (100kΩ + 10kΩ)) ≈ 1.09V.

[0046] After acquiring the detected voltage of 1.09V, the system compares it with a preset threshold. For example, the system sets a preset threshold of 0.5V. Since 1.09V is higher than 0.5V, the system determines that the battery pack connector is in a water-ingress state. Subsequently, based on this judgment, the system can issue a warning message to the driver or take other protective measures. In this way, the method utilizes the existing electrical structure of the connector, achieving effective monitoring of water ingress without the need for additional dedicated physical detection components.

[0047] By reusing existing power and signal terminals in the electrical connection equipment, low-cost water ingress detection can be achieved. Specifically, when the power switch of the electrical connection equipment is in the ON state, the power terminal outputs a supply voltage. Based on this, the detection voltage of the signal terminal is obtained. This signal terminal is an existing terminal in the electrical connection equipment originally used for communication or signal acquisition, eliminating the need for additional dedicated probes and thus saving the material and assembly costs of dedicated probes and their associated fixing structures, sealing structures, and wire harness connectors. Furthermore, when water enters the cavity of the electrical connection equipment, the water acts as a conductive medium, forming an equivalent voltage divider circuit between the power and signal terminals. This equivalent voltage divider circuit, under the influence of the supply voltage, causes the signal terminal to generate a shifted detection voltage. Utilizing the electrical phenomena formed after water ingress, the power terminal, originally used only for power transmission, and the signal terminal, originally used only for communication, are constructed as key components of the detection circuit without the need for any additional detection elements. When water is not present, the signal terminals and power terminals are air-insulated, resulting in an equivalent resistance approaching infinity. The supply voltage to the power terminals cannot form an effective voltage component on the signal terminals, and the signal terminal voltage remains within a preset normal level range. However, when water is present, the water acts as a conductive medium, creating a finite and definite equivalent resistance between the power terminals and signal terminals. The supply voltage, through this equivalent voltage divider circuit, generates a detectable voltage shift on the signal terminals. A clear and distinguishable voltage difference exists between the two. Therefore, the water ingress status of the electrical connection equipment can be accurately determined based on the detected voltage. This judgment process requires only simple voltage comparison logic, without the need for complex signal processing modules or high-frequency injection devices. In summary, this method achieves low-cost water ingress detection of electrical connection equipment by reusing existing terminals, utilizing the equivalent voltage divider circuit formed by water ingress, and requiring only voltage detection. This fundamentally overcomes the high cost of existing technologies due to the addition of dedicated detection components, reducing the manufacturing and maintenance costs of electrical connection equipment. Meanwhile, this method reflects the water ingress situation by changing electrical parameters (i.e., detection voltage), which has high sensitivity and real-time performance, and can detect water ingress problems in a timely manner, thereby improving the safety and reliability of electrical connection equipment and even the entire electrical system.

[0048] Based on the above embodiments, in an exemplary embodiment, the process of acquiring the detection voltage in step S101 is further refined. Optionally, such as Figure 2 As shown, it includes: S201, Disconnect the internal electrical connection between the target functional module and the signal terminal.

[0049] The target functional module refers to the module that drives or biases the signal terminals before disconnecting their internal electrical connection. A target functional module can refer to any functional unit within an electrical connection device that has an electrical connection to the signal terminals. This target functional module typically has specific functions, such as data communication, sensor interface, or power management.

[0050] Disconnecting the internal electrical connection between the target functional module and the signal terminals means isolating the current or signal path between the signal terminals and the target functional module before acquiring the detection voltage. The purpose is to ensure the signal terminals are electrically suspended during detection, thus preventing them from being driven or biased by the internal circuitry of the target functional module. This ensures the acquired detection voltage is coupled from the power terminals through a water resistor (i.e., the equivalent resistance formed between the power terminals and the signal terminals), resulting in accurate and reliable detection results. One possible approach is to physically disconnect the internal electrical connection between the signal terminals and the target functional module by controlling one or more electronic switches (such as MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) or relays). Another approach is to use software to control the target functional module to enter a low-power mode or disable its input / output pins associated with the signal terminals, causing its internal circuitry to present a high-impedance state to the signal terminals, thereby achieving a disconnection of the internal electrical connection. The target functional module can be a communication module, such as a UART (Universal Asynchronous Receiver / Transmitter), SPI (Serial Peripheral Interface), or I2C (Inter-Integrated Circuit) interface module for data transmission, or a sensor interface module for connecting external sensors and processing their signals.

[0051] As an optional implementation, the target functional module includes a communication module; S201 specifically includes: controlling the communication module to disconnect the connection between its internal pull-up resistor and the signal terminal, and / or, disconnecting the connection between its internal pull-down resistor and the signal terminal.

[0052] The communication module refers to the key component in the electrical connection equipment responsible for data transmission and reception. For example, it can be an interface chip for UART, SPI, I2C, CAN (Controller Area Network) bus or wireless communication, or a communication peripheral integrated into a microcontroller.

[0053] A pull-up resistor is a resistor element installed inside a communication module. One end is connected to the internal power supply, and the other end can be selectively connected to the signal terminal through an internal switch. It is used to pull the potential of the signal terminal to a high level.

[0054] A pull-down resistor is a resistor element installed inside a communication module. One end is connected to the internal ground terminal, and the other end can be selectively connected to the signal terminal through an internal switch. It is used to pull the potential of the signal terminal to a low level.

[0055] When the communication module is operating normally, it applies a predetermined default voltage level to the signal terminals through its internal pull-up resistors (pulling the signal high) or pull-down resistors (pulling the signal low). During water ingress detection, if the communication module remains electrically connected to the signal terminals, the drive voltage output by the communication module or the bias current introduced by its internal pull-up / pull-down resistors will interfere with the actual potential of the signal terminals under the equivalent voltage divider circuit, causing the detected voltage to fail to accurately reflect the water ingress status. Therefore, by disconnecting the internal electrical connection between the communication module and the signal terminals, the signal terminals are placed in an electrically suspended state unaffected by internal bias. This ensures that the detected voltage is generated solely by coupling from the power terminals to the signal terminals via the equivalent resistance formed by the water ingress, thereby improving the accuracy of water ingress detection. Some possible implementations may include: configuring the registers of the communication module via software to set the relevant pins to a high-impedance state or disable the internal pull-up / pull-down function, thereby disconnecting the connection between the pull-up resistor and the signal terminal and / or disconnecting the connection between the pull-down resistor and the signal terminal; or through hardware design, such as setting a controllable switching circuit between the pull-up resistor and the signal terminal, to physically isolate the pull-up resistor and / or the pull-down resistor through the switching circuit.

[0056] S202, Obtain the detection voltage of the signal terminal in the electrical connection device after the internal electrical connection is disconnected.

[0057] After the internal electrical connection between the target functional module and the signal terminal is disconnected, the voltage on the signal terminal is measured to obtain the detection voltage.

[0058] The following is a specific example to illustrate this.

[0059] When detecting water ingress in electrical connection equipment, the communication module inside the equipment can first be put into a high-impedance mode via control commands. For example, if the communication module is a UART interface, a specific value can be written to its control register to disconnect the internal connection between its transmit and receive pins and the signal terminals, or to disable its input / output buffer. After the internal electrical connection between the communication module and the signal terminals is disconnected, a high-precision analog-to-digital converter (ADC) can be used to sample the voltage on the signal terminals. This ADC can be integrated into the main controller or be a separate external chip. The ADC converts the analog voltage of the signal terminals into a digital value, which is then transmitted to the processor for subsequent analysis and water ingress status determination. In this way, it is ensured that the communication module does not impose an additional load or voltage division effect on the signal terminal voltage during measurement, thus obtaining more accurate detection results.

[0060] By using the above technical solution, before obtaining the detection voltage of the signal terminal in the electrical connection equipment, the internal electrical connection between the target functional module and the signal terminal is disconnected. This effectively avoids interference from the internal circuit of the target functional module on the detection voltage of the signal terminal, so that the obtained detection voltage can more accurately reflect the true situation of the equivalent voltage divider circuit formed between the power terminal and the signal terminal due to water ingress. This significantly improves the accuracy and reliability of the water ingress status judgment of the electrical connection equipment and reduces the risk of false alarms or missed alarms.

[0061] Based on the above embodiments, in an exemplary embodiment, the process of the water inlet state in step S201 is further refined. Optionally, such as Figure 3 As shown, it includes: S301 determines the equivalent resistance between the power terminal and the signal terminal based on the supply voltage, the detection voltage, and the preset voltage divider resistor.

[0062] Among them, the preset voltage divider resistor refers to a resistor with a known resistance value that is set in advance. It forms a voltage divider network with the equivalent resistance and serves as a known reference quantity for calculating the equivalent resistance.

[0063] Equivalent resistance refers to the equivalent impedance value formed by the conductive medium between the power terminal and the signal terminal. Its resistance value reflects the degree of water ingress and provides a basis for determining the water ingress status.

[0064] When the power switch of an electrical connection device is in the ON state, if water enters the device, it will create a conductive path between the power terminal and the signal terminal. This conductive path can be considered as an equivalent resistance. This equivalent resistance, together with the preset voltage divider resistor, forms a voltage divider circuit. Under the influence of the supply voltage, the signal terminal will generate a detection voltage. The equivalent resistance value can be directly obtained by substituting the supply voltage, detection voltage, and preset voltage divider resistor into the corresponding circuit formula using the voltage divider principle. Alternatively, the equivalent resistance value can be quickly obtained by using a pre-established lookup table or mathematical model, with the supply voltage, detection voltage, and preset voltage divider resistor as input.

[0065] S302, determine the water inlet status based on the equivalent resistance.

[0066] The calculated equivalent resistance value is compared with a preset water ingress status criterion to determine the current water ingress status of the electrical connection equipment. The equivalent resistance typically varies widely and is inversely proportional to the degree of water ingress, thus providing a clearer and more discriminative basis for judgment. One approach is to set a series of equivalent resistance threshold ranges and compare the equivalent resistance with each of these ranges to determine which range it falls into, thereby identifying the corresponding water ingress status and level (e.g., no water ingress, slight water ingress, moderate water ingress, severe water ingress). Another approach is to use the equivalent resistance as input and process it through a pre-trained classification algorithm (such as support vector machine, decision tree, etc.) to directly output the water ingress status category of the electrical connection equipment.

[0067] The above technical solution converts the detection voltage into an equivalent resistance with a clear physical meaning, making the judgment of the water ingress status of electrical connection equipment more quantitative and accurate, providing a reliable basis for subsequent targeted protection measures, and improving the accuracy and reliability of water ingress detection.

[0068] Based on the above embodiments, in an exemplary embodiment, the process of determining the equivalent resistance in step S301 is further refined. Optionally, such as Figure 4 As shown, it includes: S401, multiplying the supply voltage and the preset voltage divider resistor to obtain the product value; S402, dividing the product value and the detection voltage to obtain the quotient value; S403, determining the equivalent resistance between the power terminal and the signal terminal based on the difference between the quotient value and the preset voltage divider resistor.

[0069] First, the supply voltage and the preset voltage divider resistor are multiplied to obtain an intermediate product value. Then, this product value is divided by the actual measured detection voltage to obtain a quotient. Finally, the preset voltage divider resistor is subtracted from this quotient to obtain the equivalent resistance between the power terminal and the signal terminal.

[0070] The following is a specific example to illustrate this.

[0071] Assume the power supply voltage of the electrical connection device is 5V and the preset voltage divider resistor is 10kΩ. When water enters the electrical connection device, the detection voltage measured at the signal terminal is 2V. To determine the equivalent resistance between the power terminal and the signal terminal, firstly, multiply the power supply voltage 5V by the preset voltage divider resistor 10kΩ, obtaining a product value of 50000. Next, divide this product value 50000 by the detection voltage 2V, obtaining a quotient value of 25000. Finally, based on the difference between the quotient value 25000 and the preset voltage divider resistor 10kΩ, i.e., 25000 - 10000 = 15000, the equivalent resistance between the power terminal and the signal terminal is determined to be 15kΩ. This calculation process can be automatically executed in the microcontroller inside the electrical connection device through a preset firmware program.

[0072] The above technical solution provides a clear and operable mathematical calculation procedure for accurately converting the detection voltage of electrical connection equipment under water ingress conditions into the equivalent resistance between power terminals and signal terminals, based on the known supply voltage and preset voltage divider resistors. This standardized calculation process avoids potential ambiguity or errors in the derivation of equivalent resistance, ensuring the accuracy and consistency of the calculation. Therefore, it provides reliable quantitative data for subsequent assessment of the severity of water ingress in electrical connection equipment based on equivalent resistance, significantly improving the accuracy and reliability of water ingress detection, and thus providing a solid foundation for the formulation of protection strategies for electrical connection equipment.

[0073] Based on the above embodiments, in an exemplary embodiment, when the water ingress state is water ingress into the electrical connection device, the method further includes: executing a graded protection strategy according to the severity of the water ingress into the electrical connection device; the graded protection strategy includes at least one of limiting the usage time of the load device connected to the electrical connection device, issuing an alarm message, or disconnecting the power switch.

[0074] The severity of water ingress into electrical connection equipment refers to the degree to which factors such as the amount of water entering the equipment, the conductivity of the water, and the location of the ingress affect the equipment's electrical performance and safe operation. This can be assessed based on the range and trend of the detected voltage, or data from other auxiliary sensors (such as humidity sensors). For example, the closer the detected voltage is to the supply voltage, the lower the resistance of the equivalent voltage divider circuit, indicating more severe water ingress.

[0075] A graded protection strategy refers to a mechanism that takes corresponding protective measures based on the severity of water ingress into electrical connection equipment. This strategy aims to avoid over-protection or under-protection, thereby maximizing the availability of the load equipment while ensuring its safety. It can be implemented by dividing different severity levels using preset thresholds or ranges, and configuring one or more sets of protective actions for each level.

[0076] Usage time refers to the permitted operating time of the load device. For example, after water ingress is detected in an electrical connection device, a countdown is set based on the severity of the water ingress. When the time expires, the load device automatically stops operating or enters a low-power mode.

[0077] Alarm messages are reports to users or system administrators of water ingress into electrical connection equipment, delivered via visual (e.g., flashing indicator lights, screen displays), audible (e.g., buzzers, voice prompts), or other communication methods (e.g., SMS messages, network notifications). The urgency and content of alarm messages can be differentiated based on the severity of the water ingress, enabling recipients to understand and take timely action.

[0078] A power switch is a controllable switching device installed inside a load device to control the on / off state of the power supply circuit. Its function is to allow the power terminals to receive or lose power supply voltage.

[0079] When water ingress is detected in the electrically connected equipment, the severity of the water ingress is assessed based on the detected voltage at the signal terminal and pre-defined judgment criteria. Depending on the severity, corresponding protective actions are triggered. These protective actions are designed as a series of tiered responses, including limiting the usage time of the load equipment connected to the electrical connection, issuing an alarm message, or disconnecting the power switch of the load equipment at least one of these. This tiered processing mechanism can take appropriate measures for different levels of risk, avoiding excessive downtime caused by immediately cutting off power in cases of minor water ingress, and preventing potential hazards caused by insufficient protection in cases of severe water ingress. In this way, the solution of this application further improves the safety and reliability of the load equipment connected to the electrical connection, in addition to achieving water ingress detection.

[0080] As an optional implementation, a graded protection strategy is executed according to the severity of water ingress into the electrical connection equipment, including: when the detected voltage is within a first preset voltage range, determining the severity of water ingress into the electrical connection equipment as a first-level fault, limiting the first usage time of the load equipment and issuing a first alarm message; when the detected voltage is within a second preset voltage range, determining the severity of water ingress into the electrical connection equipment as a second-level fault, limiting the second usage time of the load equipment and issuing a second alarm message; when the detected voltage is within a third preset voltage range, determining the severity of water ingress into the electrical connection equipment as a third-level fault, issuing a third alarm message and disconnecting the power switch.

[0081] Among them, the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range, and the upper limit of the second preset voltage range is less than the lower limit of the third preset voltage range; the first usage time is greater than the second usage time.

[0082] The first, second, and third preset voltage ranges are voltage ranges preset based on the electrical characteristics of the electrical connection equipment under different levels of water ingress, through experimental testing, simulation analysis, or experience accumulation.

[0083] Level 1, Level 2, and Level 3 faults represent minor, moderate, and severe water ingress, respectively. These fault levels can be identified by specific status variables or error codes.

[0084] The first, second, or third alarm messages can be displayed as different warning texts, by flashing LED indicators in different colors or frequencies, or by emitting different tones or rhythms of alert sounds through a buzzer.

[0085] The operation of limiting the first or second usage time of electrical connection equipment can be achieved by monitoring the equipment's running time through a software timer. Once the preset limit is reached, the control unit issues a command to put the equipment into a low-power mode or suspend some functions.

[0086] When water enters electrical connection equipment, the equivalent voltage divider circuit formed between the power terminals and signal terminals will generate different detection voltages depending on the degree of water ingress. By matching this detection voltage with a first, second, and third preset voltage range, the severity of water ingress—whether minor, moderate, or severe—can be accurately determined. For example, when the detection voltage is within the first preset voltage range, it indicates a minor water ingress, and relatively lenient protection measures are implemented, such as limiting the initial usage time of the load equipment and issuing a first alarm message to alert the user and allow the load equipment to continue operating to a certain extent. When the detection voltage rises to the second preset voltage range, it indicates a more severe water ingress, and more stringent protection measures are implemented, such as limiting the second usage time of the load equipment and issuing a second alarm message to further reduce the risk. When the detection voltage reaches the third preset voltage range, it indicates a very severe water ingress, and a third alarm message is immediately issued and the power switch of the load equipment is disconnected to maximize the safety of the load equipment and the user. This tiered response mechanism ensures the uniqueness and accuracy of fault level determination by guaranteeing that the upper limit of the first voltage range is lower than the lower limit of the second voltage range, and the upper limit of the second voltage range is lower than the lower limit of the third voltage range. Simultaneously, setting the first usage time to be longer than the second usage time makes the protection strategy more rational and effective.

[0087] As another optional implementation, the severity of water ingress into the electrical connection equipment can be determined based on the magnitude of the equivalent resistance, and a graded protection strategy can be implemented accordingly. Specifically, when the equivalent resistance is within a first preset resistance range, the water ingress condition is determined to be a first-level fault, the first usage time of the load equipment is limited, and a first alarm message is issued. When the cumulative first usage time exceeds a first preset threshold, it is upgraded to a second-level fault. When the equivalent resistance is within a second preset resistance range, the water ingress condition is determined to be a second-level fault, the second usage time of the load equipment is limited, and a second alarm message is issued. When the cumulative second usage time exceeds a second preset threshold, it is upgraded to a third-level fault. When the equivalent resistance is within a third preset resistance range, the water ingress condition is determined to be a third-level fault, a third alarm message is output, and the power switch is disconnected after a delay. The lower limit of the first preset resistance range is greater than the upper limit of the second preset resistance range, and the lower limit of the second preset resistance range is greater than or equal to the upper limit of the third preset resistance range. During the fault period, when the equivalent resistance is detected to return to normal, the timers for the first and / or second usage times are cleared, and the timers are not cleared upon power-on or power-off.

[0088] Through the above technical solution, this application can dynamically adjust the protection strategy according to the severity of water ingress into the electrical connection equipment, thereby avoiding the problems of over-protection or under-protection that may be caused by a single protection measure. This refined hierarchical protection mechanism improves the safety and reliability of the load equipment under water ingress conditions.

[0089] To enable those skilled in the art to better understand the execution process of the above-mentioned water ingress detection method for electrical connection equipment, the following detailed description will be given using a battery pack as the load device and a connector of the battery pack as the electrical connection device.

[0090] The water ingress detection method for this electrical connection equipment is applied to, for example... Figure 5 The water ingress detection device shown has PIN1 and PIN2 as the power terminal (i.e., power PIN, which is also the positive discharge terminal (P+) of the battery pack) and signal terminal (i.e., signal PIN) of the connector, respectively. When water enters the connector, a short circuit occurs between PIN1 and PIN2, which will cause an electrochemical reaction at the connector, corroding the pins of PIN1 and PIN2; or dendrites will grow between PIN1 and PIN2 of the connector, causing a short circuit between PIN1 and PIN2, affecting the function of the battery pack and creating a safety risk.

[0091] R is the equivalent resistance formed between PIN1 and PIN2 after water enters the connector.

[0092] The communication module (i.e., the communication module) is connected to PIN2. It is an existing module in the battery pack that is connected to PIN2 and is considered a basic module of the BMS that requires the use of signal PINs.

[0093] The voltage detection module, along with PIN2, the communication module, and the battery pack cells (i.e., Figure 5 The cells in the middle are connected to detect the voltage on PIN2, i.e., the detection voltage.

[0094] The power MOSFET, or power switch of the battery pack, is connected to PIN1 and the battery cells of the battery pack. The power MOSFET is usually turned on when the battery pack needs to be charged or discharged. That is, when the battery pack is in normal working condition and needs to output power (discharge) or receive power from the outside (charge), the BMS controls the power MOSFET to turn on, so that the high-voltage circuit between the battery cell and the power terminal of the electrical connection device is established.

[0095] The external total voltage detection module, connected to PIN1 and the power MOSFET, is a basic module in the BMS. It is used to collect the voltage of the power port of the battery pack, that is, the supply voltage output by the power terminal.

[0096] The execution process of the water ingress detection method for this electrical connection equipment is as follows: Detection is performed only when the power MOSFET is turned on.

[0097] After the power MOSFET is turned on, when the detection module performs voltage sampling (i.e., obtains the detection voltage of PIN2), the communication module can actively turn off its own pull-up resistor and / or pull-down resistor to avoid affecting the voltage sampling and obtain a more accurate detection voltage.

[0098] The voltage V detected by the voltage detection module pin2 (i.e., detection voltage), the total external voltage V of the battery pack detected by the external total voltage detection module. p+ (i.e., the supply voltage) and the known equivalent voltage divider resistor (i.e., the preset voltage divider resistor) R inside the voltage detection module. d Through the formula R=V p+ * R d / V pin2 - R d Calculate the equivalent resistance R.

[0099] Based on the detected resistance value of R, the BMS can adopt different graded protection strategies. For example, when a minor water ingress short circuit occurs and the value of R is at level M (i.e., the R value is within the first preset resistance range), it is defined as a level 1 fault (i.e., level 1 fault). The battery pack's first usage time T1 is limited, and a first alarm message is issued through flashing lights, the vehicle's instrument panel, and the APP (Application) to remind the user and request them to clean the connectors. When the battery pack experiences this level 1 fault, and the accumulated first usage time exceeds the first threshold, it is upgraded to a level 2 fault (i.e., level 2 fault). During the fault, the timer will only be cleared when the BMS detects that the R value has returned to normal; restarting the battery pack will not clear the timer.

[0100] When R is in the hundreds of kilohertz range (i.e., R is within the second preset resistance range), it is defined as a Level 2 fault. The second usage time T2 of the battery pack is limited (T1>T2), and a second alarm message is issued to the user, requesting them to clean the connectors. Once the battery pack experiences this Level 2 fault, and the accumulated second usage time exceeds the second threshold, it is upgraded to a Level 3 fault (i.e., a Level 3 fault). During the fault period, the timer will only be cleared when the BMS detects that the R value has returned to normal; restarting the battery pack will not clear the timer.

[0101] When R is higher than 100K (i.e., R is within the third preset resistance range), it is defined as a level 3 fault. A third alarm message needs to be issued to the user, requiring the user to clean the connector. After the alarm is completed, the power MOSFET will be disconnected after a few seconds of delay. The level 3 fault will only be cleared when the R value returns to normal.

[0102] Each time the power MOSFET of the battery pack is closed, it will perform corresponding operations based on the real-time R value and the historical fault level.

[0103] By adding a simple voltage detection module to the existing components of the battery pack, it is possible to detect whether water has entered the battery pack connector cavity, which significantly improves the safety of battery pack use with only a small increase in cost.

[0104] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0105] Corresponding to the water ingress detection method for an electrical connection device in the above embodiments, an exemplary embodiment provides a water ingress detection device for an electrical connection device. For ease of explanation, only the parts related to the embodiments of this application are shown.

[0106] Reference Figure 6 The water ingress detection device of the electrical connection equipment includes: The voltage acquisition module 601 is used to acquire the detection voltage of the signal terminal in the electrical connection device when the electrical connection device is powered on; wherein, the electrical connection device includes a power terminal and a signal terminal, the power terminal is used to output the power supply voltage, and the power terminal and the signal terminal form an equivalent voltage divider circuit in the water inlet state, the equivalent voltage divider circuit is used to make the signal terminal generate a detection voltage under the action of the power supply voltage; The detection module 602 is used to determine the water ingress status of the electrical connection equipment based on the detection voltage.

[0107] As an optional implementation, the voltage acquisition module 601 includes: a connection disconnection unit for disconnecting the internal electrical connection between the target functional module and the signal terminal; the target functional module refers to the module that drives or biases the signal terminal before disconnecting the internal electrical connection with the signal terminal; and a voltage acquisition unit for acquiring the detection voltage of the signal terminal in the electrical connection device after the internal electrical connection is disconnected.

[0108] As an optional implementation, the target functional module includes a communication module; the connection disconnection unit is specifically used to control the communication module to disconnect its internal pull-up resistors and / or pull-down resistors from the signal terminals.

[0109] As an optional implementation, the detection module 602 includes: a resistance determination unit, used to determine the equivalent resistance between the power terminal and the signal terminal based on the supply voltage, the detection voltage and the preset voltage divider resistor; and a detection unit, used to determine the water inlet status based on the equivalent resistance.

[0110] As an optional implementation, the resistance determination unit is specifically used to: multiply the supply voltage and the preset voltage divider resistor to obtain the product value; divide the product value and the detection voltage to obtain the quotient value; and determine the equivalent resistance between the power terminal and the signal terminal based on the difference between the quotient value and the preset voltage divider resistor.

[0111] As an optional implementation, when the water ingress condition is water ingress into the electrical connection equipment, the device further includes: a strategy execution module, used to execute a graded protection strategy according to the severity of water ingress into the electrical connection equipment; the graded protection strategy includes at least one of limiting the usage time of the load equipment connected to the electrical connection equipment, issuing an alarm message, or disconnecting the power switch.

[0112] As an optional implementation, the strategy execution module is specifically used to: when the detected voltage is within a first preset voltage range, determine the severity of water ingress into the electrical connection equipment as a first-level fault, limit the first usage time of the load equipment, and issue a first alarm message; when the detected voltage is within a second preset voltage range, determine the severity of water ingress into the electrical connection equipment as a second-level fault, limit the second usage time of the load equipment, and issue a second alarm message; when the detected voltage is within a third preset voltage range, determine the severity of water ingress into the electrical connection equipment as a third-level fault, issue a third alarm message, and disconnect the power switch; wherein, the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range, the upper limit of the second preset voltage range is less than the lower limit of the third preset voltage range, and the first usage time is greater than the second usage time.

[0113] It should be noted that the information interaction and execution process between the modules in the water ingress detection device of the above-mentioned electrical connection equipment are based on the same concept as the method embodiment of this application. For details on their specific functions and technical effects, please refer to the method embodiment section, which will not be repeated here.

[0114] In one exemplary embodiment, a computer device is also provided, which may be a server, and its internal structure diagram may be as follows: Figure 7As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data required for a water ingress detection method for electrical connection equipment. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a water ingress detection method for electrical connection equipment.

[0115] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0116] In one exemplary embodiment, a computer-readable storage medium is also provided, which stores a computer program that, when executed by a processor, can implement the steps in the various method embodiments described above.

[0117] In one exemplary embodiment, a computer program product is provided that, when run on a mobile terminal, enables the mobile terminal to perform the steps described in the various method embodiments.

[0118] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to a photographic device / terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks.

[0119] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0120] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0121] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0122] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0123] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for detecting water ingress in an electrical connection device, characterized in that, include: When the electrical connection device is powered on, the detection voltage of the signal terminal in the electrical connection device is acquired; wherein, the electrical connection device includes a power terminal and the signal terminal, the power terminal is used to output the power supply voltage, the power terminal and the signal terminal form an equivalent voltage divider circuit in the water inlet state, and the equivalent voltage divider circuit is used to make the signal terminal generate the detection voltage under the action of the power supply voltage; The water ingress status of the electrical connection equipment is determined based on the detected voltage.

2. The water ingress detection method for electrical connection equipment according to claim 1, characterized in that, The step of obtaining the detection voltage of the signal terminal in the electrical connection device includes: Disconnect the internal electrical connection between the target functional module and the signal terminal; the target functional module refers to the module that drives or biases the signal terminal before disconnecting the internal electrical connection with the signal terminal. Obtain the detection voltage of the signal terminals in the electrical connection device after the internal electrical connection is disconnected.

3. The water ingress detection method for electrical connection equipment according to claim 2, characterized in that, The target functional module includes a communication module; disconnecting the internal electrical connection between the target functional module and the signal terminal includes: The communication module is controlled to disconnect its internal pull-up and / or pull-down resistors from the signal terminals.

4. The method for detecting water ingress into electrical connection equipment according to any one of claims 1-3, characterized in that, Determining the water ingress status of the electrical connection equipment based on the detected voltage includes: The equivalent resistance between the power terminal and the signal terminal is determined based on the supply voltage, the detection voltage, and the preset voltage divider resistor. The water inlet state is determined based on the equivalent resistance.

5. The water ingress detection method for electrical connection equipment according to claim 4, characterized in that, Determining the equivalent resistance between the power terminal and the signal terminal based on the supply voltage, the detection voltage, and the preset voltage divider resistor includes: The product of the supply voltage and the preset voltage divider resistor is calculated to obtain the product value; The product value and the detection voltage are divided to obtain the quotient value; The equivalent resistance between the power terminal and the signal terminal is determined based on the difference between the quotient and the preset voltage divider resistor.

6. The method for detecting water ingress into electrical connection equipment according to any one of claims 1-3, characterized in that, When the water inlet state is that the electrical connection device is inlet, the method further includes: A graded protection strategy is implemented based on the severity of water ingress into the electrical connection equipment; the graded protection strategy includes at least one of limiting the usage time of the load equipment connected to the electrical connection equipment, issuing an alarm message, or disconnecting the power switch of the load equipment.

7. The water ingress detection method for electrical connection equipment according to claim 6, characterized in that, The step of implementing a graded protection strategy based on the severity of water ingress into the electrical connection equipment includes: When the detected voltage is within the first preset voltage range, the severity of water ingress into the electrical connection equipment is determined to be a first-level fault, the first usage time of the load equipment is limited, and a first alarm message is issued. When the detected voltage is within the second preset voltage range, the severity of water ingress into the electrical connection equipment is determined to be a second-level fault, the second usage time of the load equipment is limited, and a second alarm message is issued; When the detected voltage is within the third preset voltage range, the severity of water ingress into the electrical connection equipment is determined to be a level three fault, a third alarm message is issued, and the power switch is disconnected. Wherein, the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range, and the upper limit of the second preset voltage range is less than the lower limit of the third preset voltage range; the first usage duration is greater than the second usage duration.

8. A water ingress detection device for an electrical connection device, characterized in that, include: A voltage acquisition module is used to acquire the detection voltage of the signal terminal in the electrical connection device when the electrical connection device is powered on; wherein, the electrical connection device includes a power terminal and the signal terminal, the power terminal is used to output a power supply voltage, the power terminal and the signal terminal form an equivalent voltage divider circuit in the water inlet state, and the equivalent voltage divider circuit is used to cause the signal terminal to generate the detection voltage under the action of the power supply voltage; The detection module is used to determine the water ingress status of the electrical connection equipment based on the detection voltage.

9. A computer device, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the water ingress detection method for an electrical connection device as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the water ingress detection method for an electrical connection device as described in any one of claims 1 to 7.

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