MOS adhesion diagnosis method, device and electronic equipment for vehicle battery

Abstract

This application provides a method, apparatus, electronic device, computer-readable storage medium, and computer program product for diagnosing MOS adhesion in vehicle batteries. The method includes: acquiring vehicle usage data and battery-related power consumption data; wherein the vehicle is powered by a battery, and the battery controls the current flow through a MOS; determining whether the MOS adhesion diagnosis prerequisites are met based on the usage data and power consumption data; wherein the MOS adhesion diagnosis prerequisites include vehicle safety conditions for constraining the usage data and MOS safety conditions for constraining the power consumption data; when the MOS adhesion diagnosis prerequisites are met, performing a disconnection operation on the MOS; and determining whether MOS adhesion has occurred based on the voltage difference across the MOS after the disconnection operation. This application enables timely adhesion diagnosis, preventing more serious faults caused by MOS adhesion, avoiding interference with normal vehicle use, and preventing damage to the MOS after disconnection.

Description

Technical Field

[0001] This application relates to battery technology, and more particularly to a method, apparatus, electronic device, computer-readable storage medium, and computer program product for diagnosing MOS adhesion in vehicle batteries. Background Technology

[0002] MOS is an abbreviation for Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). It has the characteristics of small size, high speed, high reliability, low power consumption and low cost, and is therefore widely used in vehicles, computers, communications, electromechanical instruments, home appliance automation, aerospace and other fields. For example, MOS in vehicle batteries can be used to control the current on and off to achieve effective power supply to the vehicle.

[0003] The internal or external structure of a MOSFET may change, causing parts of the circuit that should be disconnected to remain conductive (closed), a phenomenon known as MOSFET sticking. If a MOSFET has already stuck, and the battery experiences faults requiring MOSFET disconnection such as overvoltage, overcurrent, or overtemperature, the MOSFET may fail to disconnect, potentially leading to thermal runaway. Current solutions typically only assess MOSFET sticking after a fault triggers (e.g., overvoltage, overcurrent, or overtemperature), resulting in poor timeliness of sticking diagnosis and potentially exacerbating more serious faults. Summary of the Invention

[0004] This application provides a method, apparatus, electronic device, computer-readable storage medium, and computer program product for diagnosing MOS adhesion in vehicle batteries. It can promptly diagnose adhesion, avoid more serious faults caused by MOS adhesion, and prevent interference with the user's normal use of the vehicle, as well as prevent damage to the MOS after disconnection.

[0005] The technical solution of this application is implemented as follows:

[0006] This application provides a method for diagnosing MOS adhesion in a vehicle battery, including:

[0007] Acquire vehicle usage data and power consumption data related to the battery in the vehicle; wherein the vehicle is powered by a battery, and the battery controls the current flow through a MOS.

[0008] Based on the vehicle usage data and the power consumption data, it is determined whether the preconditions for MOS adhesion diagnosis are met; wherein, the preconditions for MOS adhesion diagnosis include vehicle safety conditions for constraining the vehicle usage data and MOS safety conditions for constraining the power consumption data;

[0009] When the preconditions for MOS adhesion diagnosis are met, a disconnection operation is performed on the MOS;

[0010] The sticking of the MOS is determined by the voltage difference between its two ends after the disconnection operation.

[0011] This application provides a diagnostic device for MOS adhesion in vehicle batteries, comprising:

[0012] The acquisition module is used to acquire vehicle usage data and power consumption data related to the battery in the vehicle; wherein the vehicle is powered by a battery, and the battery controls the current flow through a MOS.

[0013] The first judgment module is used to determine whether the adhesion diagnosis prerequisites of the MOS are met based on the vehicle usage data and the power consumption data; wherein, the adhesion diagnosis prerequisites of the MOS include vehicle safety conditions for constraining the vehicle usage data and MOS safety conditions for constraining the power consumption data.

[0014] The disconnect module is used to perform a disconnect operation on the MOS when the adhesion diagnosis preconditions of the MOS are met;

[0015] The second judgment module is used to determine whether the MOS has stuck together based on the voltage difference between its two ends after the MOS performs a disconnection operation.

[0016] This application provides an electronic device, including:

[0017] Memory, used to store executable instructions;

[0018] The processor, when executing executable instructions stored in the memory, implements the MOS adhesion diagnosis method for vehicle batteries provided in this application.

[0019] This application provides a computer-readable storage medium storing executable instructions for inducing a processor to execute and implement the MOS adhesion diagnosis method for vehicle batteries provided in this application.

[0020] This application provides a computer program product including executable instructions for implementing the MOS adhesion diagnosis method for vehicle batteries provided in this application when executed by a processor.

[0021] This application has the following beneficial effects:

[0022] This application acquires vehicle usage data and battery-related power consumption data. The vehicle is powered by a battery, which controls the current flow via a MOSFET. Based on the usage and power consumption data, it determines whether the MOSFET adhesion diagnosis prerequisites are met. These prerequisites include vehicle safety conditions constraining the usage data and MOSFET safety conditions constraining the power consumption data. When the MOSFET adhesion diagnosis prerequisites are met, a disconnection operation is performed on the MOSFET. The voltage difference across the MOSFET after the disconnection operation determines whether adhesion has occurred. This application enables timely adhesion diagnosis, preventing more serious faults caused by MOSFET adhesion. Furthermore, by introducing MOSFET adhesion diagnosis prerequisites as constraints, it avoids hindering normal vehicle use and prevents MOSFET damage after disconnection. Attached Figure Description

[0023] 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 accompanying 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.

[0024] Figure 1 This is a schematic diagram of the architecture of the vehicle battery MOS adhesion diagnostic system provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the vehicle-mounted device provided in an embodiment of this application;

[0026] Figure 3A This is a first flowchart illustrating the MOS adhesion diagnosis method for vehicle batteries provided in this application embodiment;

[0027] Figure 3B This is a second flowchart illustrating the MOS adhesion diagnosis method for vehicle batteries provided in this application embodiment;

[0028] Figure 3C This is a schematic diagram of the third process of the vehicle battery MOS adhesion diagnosis method provided in the embodiments of this application;

[0029] Figure 3D This is a schematic diagram of the fourth process of the vehicle battery MOS adhesion diagnosis method provided in the embodiments of this application;

[0030] Figure 4A This is a schematic flowchart of the charging MOS adhesion diagnosis process provided in an embodiment of this application;

[0031] Figure 4BThis is a schematic flowchart of the discharge MOS adhesion diagnosis process provided in the embodiments of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the following description, references to "some embodiments" describe a subset of all possible embodiments; however, it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict. In the following description, the term "a plurality of" means at least two.

[0034] In the following description, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0036] This application provides a method, apparatus, electronic device, computer-readable storage medium, and computer program product for diagnosing MOS adhesion in vehicle batteries. It enables timely adhesion diagnosis, preventing more serious faults caused by MOS adhesion, while also avoiding interference with normal vehicle use and preventing damage to the MOS after disconnection. The following describes exemplary applications of the electronic device provided in this application. The electronic device provided in this application can be implemented as an in-vehicle device. Here, "in-vehicle device" can refer to all terminal devices deployed in a vehicle, or specifically to a Battery Management System (BMS).

[0037] See Figure 1 , Figure 1 This is a schematic diagram of the architecture of a vehicle battery MOS adhesion diagnostic system 100 provided in an embodiment of this application. The vehicle-mounted device 400 is connected to the user device 200 through a network 300, wherein the network 300 can be a wide area network or a local area network, or a combination of both.

[0038] In some embodiments, the vehicle-mounted device 400 acquires vehicle usage data and power consumption data related to the battery in the vehicle; wherein the vehicle is powered by a battery, and the battery controls the current flow through a MOS; based on the vehicle usage data and power consumption data, it is determined whether the MOS adhesion diagnosis prerequisites are met; wherein the MOS adhesion diagnosis prerequisites include vehicle safety conditions for constraining vehicle usage data and MOS safety conditions for constraining power consumption data; when the MOS adhesion diagnosis prerequisites are met, a disconnection operation is performed on the MOS; based on the voltage difference across the MOS after the disconnection operation, it is determined whether the MOS has adhered. When the vehicle-mounted device 400 detects that the MOS is stuck, it performs fault alarm processing on the MOS. For example, it outputs the corresponding fault prompt for the MOS inside the vehicle (such as displaying it on the vehicle's infotainment screen, displaying it on the vehicle's dashboard, or broadcasting it via voice). Alternatively, it sends the corresponding fault prompt for the MOS to the user device 200, so that the user device 200 outputs the corresponding fault prompt for the MOS (such as displaying it on the user device 200's screen). The relationship between the user device 200 and the vehicle can be pre-registered. For example, the user device 200 can be a mobile phone held by the driver of the vehicle.

[0039] See Figure 2 , Figure 2 This is a schematic diagram of the structure of the vehicle-mounted device 400 provided in the embodiments of this application. Figure 2 The illustrated vehicle-mounted device 400 includes at least one processor 410, a memory 450, at least one network interface 420, and a user interface 430. The various components in the vehicle-mounted device 400 are coupled together via a bus system 440. It is understood that the bus system 440 is used to implement communication between these components. In addition to a data bus, the bus system 440 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 2 The general labeled all buses as Bus System 440.

[0040] The processor 410 can be an integrated circuit chip with signal processing capabilities, such as a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0041] User interface 430 includes one or more output devices 431 that enable the presentation of media content, including one or more speakers and / or one or more visual displays. User interface 430 also includes one or more input devices 432, including user interface components that facilitate user input, such as a microphone, touch screen display, camera, other input buttons and controls.

[0042] The memory 450 may be removable, non-removable, or a combination thereof. Exemplary hardware devices include solid-state storage, hard disk drives, optical disk drives, etc. The memory 450 may optionally include one or more storage devices physically located away from the processor 410.

[0043] The memory 450 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), and the volatile memory may be random access memory (RAM). The memory 450 described in this application embodiment is intended to include any suitable type of memory.

[0044] In some embodiments, memory 450 is capable of storing data to support various operations, examples of which include programs, modules, and data structures or subsets or supersets thereof, as illustrated below.

[0045] Operating system 451 includes system programs for handling various basic system services and performing hardware-related tasks, such as the framework layer, core library layer, driver layer, etc., for implementing various basic business functions and handling hardware-based tasks;

[0046] The network communication module 452 is used to reach other electronic devices via one or more (wired or wireless) network interfaces 420, exemplary network interfaces 420 including: Bluetooth, WiFi, and Universal Serial Bus (USB), etc.

[0047] Presentation module 453 is configured to enable the presentation of information (e.g., a user interface for operating peripheral devices and displaying content and information) via one or more output devices 431 (e.g., a display screen, a speaker, etc.) associated with user interface 430;

[0048] The input processing module 454 is used to detect and translate one or more user inputs or interactions from one or more input devices 432.

[0049] In some embodiments, the MOS adhesion diagnostic device for vehicle batteries provided in this application can be implemented in software. Figure 2 A vehicle battery MOS adhesion diagnostic device 455 stored in memory 450 is shown. This device can be software in the form of programs and plug-ins, and includes the following software modules: an acquisition module 4551, a first judgment module 4552, a disconnection module 4553, and a second judgment module 4554. These modules are logically connected and can therefore be arbitrarily combined or further separated according to their implemented functions. The functions of each module will be described below.

[0050] The method for diagnosing MOS adhesion in vehicle batteries provided in this application will be described in conjunction with exemplary applications and implementations of the electronic devices provided in the embodiments of this application.

[0051] See Figure 3A , Figure 3A This is a flowchart illustrating a method for diagnosing MOS adhesion in a vehicle battery according to an embodiment of this application, which will be combined with... Figure 3A The steps shown are explained.

[0052] In step 101, vehicle usage data and power consumption data related to the vehicle's battery are acquired; wherein, the vehicle is powered by the battery, and the battery controls the current flow through a MOS.

[0053] The implementation of this application embodiment is based on the premise that the vehicle is powered by a battery, and the battery controls the current flow through a MOS. The type of battery is not limited; for example, it can be a 12V lithium battery used to power the vehicle's low-voltage load. This application embodiment supports adhesion diagnosis for charging MOS and / or discharging MOS.

[0054] First, acquire vehicle usage data and battery-related power consumption data. Vehicle usage data characterizes the user's current vehicle usage, including bus network status and gear position. Power consumption data characterizes battery charging and / or discharging status, including at least one of the following: whether the vehicle is charging (which can be further subdivided into whether the vehicle is in intelligent charging mode or plug-in charging mode), whether the vehicle's DC-DC converter is operational, the battery's charging / discharging current, and the battery's interface voltage.

[0055] In step 102, it is determined whether the preconditions for MOS adhesion diagnosis are met based on vehicle usage data and power consumption data; wherein, the preconditions for MOS adhesion diagnosis include vehicle safety conditions for constraining vehicle usage data and MOS safety conditions for constraining power consumption data.

[0056] Here, adhesion diagnosis prerequisites are pre-set for MOS. These prerequisites include vehicle safety conditions for constraining vehicle usage data and MOS safety conditions for constraining power usage data. The vehicle safety conditions ensure that MOS disconnection will not hinder the user's normal use of the vehicle, while the MOS safety conditions ensure that MOS disconnection will not cause MOS damage.

[0057] Based on this, after obtaining vehicle usage data and power consumption data through step 101, if the vehicle usage data meets the vehicle safety conditions and the power consumption data meets the MOS safety conditions, then the prerequisite for MOS adhesion diagnosis is determined to be met; if the vehicle usage data does not meet the vehicle safety conditions or the power consumption data does not meet the MOS safety conditions, then the prerequisite for MOS adhesion diagnosis is determined not to be met.

[0058] In step 103, when the preconditions for MOS adhesion diagnosis are met, a disconnection operation is performed on the MOS.

[0059] When the preconditions for MOS adhesion diagnosis are met, it proves that there is no safety hazard and supports MOS adhesion diagnosis. Therefore, the MOS is disconnected to perform adhesion diagnosis. When the preconditions for MOS adhesion diagnosis are not met, it proves that there is a safety hazard and does not support MOS adhesion diagnosis. Therefore, the process returns to step 101.

[0060] In step 104, the MOS is judged to be stuck together based on the voltage difference between its two ends after the disconnection operation is performed.

[0061] After the MOS is disconnected, the voltage difference across the MOS is used to determine whether the MOS has stuck together. For example, if the absolute value of the voltage difference across the MOS is less than a second preset voltage value, the MOS is determined to have stuck together; if the absolute value of the voltage difference across the MOS is greater than or equal to the second preset voltage value, the MOS is determined not to have stuck together.

[0062] In some embodiments, the above-mentioned determination of whether the MOS has stuck based on the voltage difference across the MOS after the disconnection operation can be achieved in the following manner: when the absolute value of the voltage difference across the MOS after the disconnection operation is less than a second preset voltage value and the duration is greater than or equal to a third preset duration, it is determined that the MOS has stuck; when the absolute value of the voltage difference across the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or the duration of the absolute value of the voltage difference being less than the second preset voltage value is less than the third preset duration, it is determined that the MOS has not stuck.

[0063] Here, in addition to constraining the voltage difference across the MOSFET after the disconnection operation, the duration of this voltage difference is also constrained. For example, if the absolute value of the voltage difference across the MOSFET after the disconnection operation is less than a second preset voltage value, and the duration (the duration for which the absolute value of the voltage difference remains less than the second preset voltage value) is greater than or equal to a third preset duration, the MOSFET is determined to be stuck. If the absolute value of the voltage difference across the MOSFET after the disconnection operation is greater than or equal to the second preset voltage value, the MOSFET is determined not to be stuck. If the absolute value of the voltage difference across the MOSFET after the disconnection operation is less than the second preset voltage value, and the duration is less than the third preset duration (meaning that the absolute value of the voltage difference changes from less than the second preset voltage value to greater than or equal to the second preset voltage value before the duration reaches the third preset duration), the MOSFET is determined not to be stuck. This additional constraint on the duration of the voltage difference further improves the accuracy of sticking diagnosis and avoids misdiagnosis; it also improves the efficiency of sticking diagnosis.

[0064] like Figure 3A As shown, this embodiment of the application acquires vehicle usage data and battery-related power consumption data. The vehicle is powered by a battery, which controls the current flow through a MOS (Metal-Oxide-Semiconductor). Based on the usage data and power consumption data, it is determined whether the MOS adhesion diagnosis prerequisites are met. These prerequisites include vehicle safety conditions for constraining the usage data and MOS safety conditions for constraining the power consumption data. When the MOS adhesion diagnosis prerequisites are met, a disconnection operation is performed on the MOS. The voltage difference across the MOS after the disconnection operation is used to determine whether adhesion has occurred. This embodiment of the application can promptly diagnose adhesion, preventing more serious faults caused by MOS adhesion. Furthermore, introducing MOS adhesion diagnosis prerequisites as constraints can prevent interference with normal vehicle use and also prevent damage to the MOS after disconnection.

[0065] In some embodiments, see Figure 3B , Figure 3BThis is a schematic flowchart of a method for diagnosing MOS adhesion in a vehicle battery provided in an embodiment of this application. Figure 3A The step 102 shown can be updated to step 201. In step 201, it is determined whether the preconditions for diagnosing adhesion of the charging MOS and the preconditions for diagnosing adhesion of the discharging MOS are met based on the vehicle usage data and power consumption data.

[0066] Here, the vehicle's battery includes two types of MOSFETs: charging MOSFETs and discharging MOSFETs. The charging MOSFETs control the on / off state of the charging current, while the discharging MOSFETs control the on / off state of the discharging current. Based on this, it can be determined whether the diagnostic prerequisites for charging MOSFET adhesion and discharging MOSFET adhesion are met, respectively, using vehicle usage data and power consumption data.

[0067] In some embodiments, vehicle usage data includes the vehicle's bus network status and gear position status; power usage data includes at least one of the following: whether the vehicle is in a charging state, whether the vehicle's DC-DC converter is in a working state, the current value of the battery's charging and discharging current, and the voltage value of the battery's interface voltage; the vehicle safety conditions in the preconditions for diagnosing the adhesion of the charging MOS include: the vehicle's bus network status is in a dormant state; the MOS safety conditions in the preconditions for diagnosing the adhesion of the charging MOS include at least one of the following: the vehicle is not in a charging state; the current value of the battery's discharging current is within a first current value range and its duration is greater than or equal to a first preset duration; the vehicle safety conditions in the preconditions for diagnosing the adhesion of the discharging MOS include: the vehicle's gear position is in a parked state; the MOS safety conditions in the preconditions for diagnosing the adhesion of the discharging MOS include at least one of the following: the vehicle's DC-DC converter is in a working state; the vehicle is in a charging state; the voltage value of the battery's interface voltage is greater than a first preset voltage value; the current value of the battery's charging current is within a second current value range and its duration is greater than or equal to a second preset duration.

[0068] Here, the vehicle safety conditions in the diagnostic prerequisites for charging MOS adhesion include: the vehicle's bus network status is in a dormant state. A dormant vehicle bus network status indicates that vehicle functions are not enabled; therefore, disconnecting the charging MOS will not affect the normal operation of vehicle functions.

[0069] The MOS safety conditions in the diagnostic prerequisites for charging MOS adhesion include at least one of the following:

[0070] 1) The vehicle is not charging. If the vehicle is charging, disconnecting the charging MOS may cause unpredictable consequences (such as damage to the charging MOS, other safety hazards, etc.), so it is necessary to ensure that the vehicle is not charging.

[0071] 2) The battery discharge current value is within a first current value range, and the duration is greater than or equal to a first preset duration. For example, a large current value range and a small current value range can be preset for the battery discharge process, and the small current value range (e.g., -0.5A to -30mA) is defined as the first current value range. In this way, by constraining the battery discharge current value to be within the first current value range and the duration to be greater than or equal to the first preset duration, it is ensured that the battery is in a small current discharge process, avoiding damage to the charging MOS caused by disconnecting it during a large current discharge process.

[0072] The vehicle safety conditions required for diagnosing MOSFET adhesion include the vehicle being in the park position. When the vehicle is parked, it is not being used by the user, and disconnecting the discharge MOSFET will not affect the user's use of the vehicle or cause a safety accident. It is worth noting that when the vehicle is parked, it may be in a bus network sleep state or a bus network wake-up state.

[0073] The MOS safety conditions in the diagnostic prerequisites for MOS adhesion during discharge include at least one of the following:

[0074] 1) The vehicle's DC-DC converter is operational. The fact that the vehicle's DC-DC converter is operational indicates that high-voltage power is being applied, further proving that the vehicle is charging.

[0075] 2) The vehicle is in a charging state. For example, the vehicle is in plug-in charging state or intelligent charging state (or automatic charging state).

[0076] 3) The battery interface voltage (e.g., the voltage at the 12V lithium battery pack terminal) is greater than the first preset voltage value. When the battery interface voltage is greater than the first preset voltage value, it indicates that the vehicle is in a charging state. It is worth noting that conditions 2) to 4) above are all to ensure that the vehicle is in a charging state, thereby avoiding damage to the discharge MOS caused by disconnecting it during the discharge process.

[0077] 4) The battery charging current value is within the second current value range, and the duration is greater than or equal to the second preset duration. For example, a large current value range and a small current value range can be preset for the battery charging process, and the small current value range (such as 2A to 5A) is defined as the second current value range. In this way, by constraining the battery charging current value to be within the second current value range and the duration to be greater than or equal to the second preset duration, it is ensured that the battery is in the process of small current charging, avoiding damage to the discharge MOS caused by disconnecting it during large current charging.

[0078] exist Figure 3Bmiddle, Figure 3A Step 103 shown can be implemented through either step 202 or step 203.

[0079] In step 202, when the preconditions for diagnosing the adhesion of the charging MOS are met, a disconnection operation is performed on the charging MOS.

[0080] When the preconditions for diagnosing the adhesion of the charging MOS are met, it proves that there is no safety hazard in disconnecting the charging MOS at this time, and supports the adhesion diagnosis of the charging MOS. Therefore, the charging MOS is disconnected in order to perform adhesion diagnosis.

[0081] In step 203, when the preconditions for diagnosing adhesion of the discharge MOS are met, a disconnection operation is performed on the discharge MOS.

[0082] When the preconditions for diagnosing adhesion of the discharge MOS are met, it proves that there is no safety hazard in disconnecting the discharge MOS at this time, and supports the adhesion diagnosis of the discharge MOS. Therefore, the discharge MOS is disconnected in order to perform adhesion diagnosis.

[0083] exist Figure 3B middle, Figure 3A Step 104 shown can be implemented through step 204 or step 205.

[0084] In step 204, it is determined whether the charging MOS has stuck together based on the voltage difference between its two ends after the disconnection operation.

[0085] After disconnecting the charging MOS in step 202, the voltage difference between the two ends of the charging MOS after the disconnection operation is performed is used to determine whether the charging MOS has stuck together.

[0086] In step 205, the voltage difference between the two ends of the discharge MOS after the disconnection operation is performed determines whether the discharge MOS has stuck together.

[0087] After disconnecting the discharge MOS in step 203, the voltage difference between the two ends of the discharge MOS after disconnection is used to determine whether the discharge MOS has stuck together.

[0088] like Figure 3B As shown, the embodiments of this application determine whether the preconditions for diagnosing adhesion of the charging MOS and the discharging MOS are met respectively. When the preconditions for diagnosing adhesion of the charging MOS are met, adhesion diagnosis is performed on the charging MOS, and when the preconditions for diagnosing adhesion of the discharging MOS are met, adhesion diagnosis is performed on the discharging MOS. That is, the embodiments of this application can support adhesion diagnosis of both charging MOS and discharging MOS, thereby improving the comprehensiveness of adhesion diagnosis.

[0089] In some embodiments, see Figure 3C , Figure 3C This is a schematic flowchart of a method for diagnosing MOS adhesion in a vehicle battery provided in an embodiment of this application. Figure 3A Step 104 shown can be implemented through steps 301 to 302, which will be explained in conjunction with each step.

[0090] In step 301, when the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is less than the second preset voltage value and the duration is greater than or equal to the third preset duration, the number of MOS adhesion diagnosis is accumulated, and when the number of MOS adhesion diagnosis reaches the preset number, it is determined that the MOS has adhered.

[0091] Here, when the absolute value of the voltage difference across the MOS after performing a disconnection operation is less than a second preset voltage value and the duration is greater than or equal to a third preset duration, the number of MOS adhesion diagnosis attempts is accumulated (or incremented). Then, it is determined whether the number of MOS adhesion diagnosis attempts has reached a preset number. When the number of MOS adhesion diagnosis attempts reaches the preset number (i.e., within a preset number of cycles, the absolute value of the voltage difference across the MOS after performing a disconnection operation is less than the second preset voltage value and the duration is greater than or equal to the third preset duration), it is determined that the MOS has adhered.

[0092] In some embodiments, after accumulating the number of MOS adhesion diagnostics, the MOS adhesion diagnostic method for vehicle batteries further includes: when the number of MOS adhesion diagnostics has not reached a preset number, performing a closing operation on the MOS and returning to the step of obtaining vehicle usage data and power consumption data related to the battery in the vehicle.

[0093] Here, if the number of times the MOS adhesion diagnosis is performed has not reached the preset number, it is not enough to determine that the MOS has adhered. Therefore, a closing operation is performed on the MOS and the process returns to step 101.

[0094] In step 302, when the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or when the duration for which the absolute value of the voltage difference between the two ends is less than the second preset voltage value is less than the third preset duration, it is determined that the MOS has not stuck together.

[0095] In some embodiments, when it is determined that the MOS has not adhered, the MOS adhesion diagnosis method for the vehicle battery further includes: resetting the number of MOS adhesion diagnoses to zero.

[0096] Here, when it is determined that the MOS has not adhered, the adhesion diagnosis count of the MOS is cleared (initialization process) so that it can be used for the next adhesion diagnosis, that is, to ensure the accuracy of the adhesion diagnosis count of the MOS used for the next adhesion diagnosis.

[0097] like Figure 3C As shown in this embodiment, when the absolute value of the voltage difference across the MOS after the disconnection operation is less than a second preset voltage value and the duration is greater than or equal to a third preset duration, the number of MOS adhesion diagnoses is accumulated, and the MOS adhesion is determined to have occurred when the number of MOS adhesion diagnoses reaches a preset number; when the absolute value of the voltage difference across the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or the duration of the absolute value of the voltage difference being less than the second preset voltage value is less than the third preset duration, the MOS adhesion is determined not to have occurred. This embodiment uses the number of MOS adhesion diagnoses as an additional constraint, which can further improve the accuracy and reliability of adhesion diagnosis results.

[0098] In some embodiments, see Figure 3D , Figure 3D This is a schematic flowchart of a method for diagnosing MOS adhesion in a vehicle battery provided in an embodiment of this application. Figure 3A Following step 104, in step 401, when the MOS sticks together, a fault alarm can be performed on the MOS.

[0099] Here, when the MOSFET sticks together, a fault alarm is triggered to alert relevant personnel (such as the vehicle driver) to address the sticking fault in a timely manner and avoid causing more serious faults (such as battery thermal runaway).

[0100] In some embodiments, the above-mentioned fault alarm processing for the MOS when it sticks together can be achieved in the following way: when the MOS sticks together, the sticking fault variable corresponding to the MOS is set to the first state value; when the battery is powered on again, the sticking fault variable corresponding to the MOS is read, and the fault alarm processing for the MOS is triggered according to the read first state value.

[0101] Here, when MOSFET adhesion occurs, the adhesion fault variable corresponding to the MOSFET is set to the first state value. This adhesion fault variable has two possible values: a first state value and a second state value (or initial state value). The first state value indicates that the MOSFET is adhesion-related, and the second state value indicates that the MOSFET is not adhesion-related. Thus, when the battery is powered on again, the adhesion fault variable corresponding to the MOSFET is read first; here, the first state value is read, triggering a fault alarm for the MOSFET. In this way, fault alarm processing is accurately and effectively triggered by setting the variable.

[0102] In some embodiments, after determining whether the MOS has stuck based on the voltage difference across the MOS after the disconnection operation is performed, the MOS sticking diagnosis method for vehicle batteries further includes: when the MOS has not stuck, setting the sticking fault variable corresponding to the MOS to a second state value.

[0103] Here, when the MOSFET is not stuck, the sticking fault variable corresponding to the MOSFET is set to the second state value. Thus, when the battery is powered on again, the sticking fault variable corresponding to the MOSFET is read first. Here, the second state value is read, so no fault alarm processing for the MOSFET is triggered, effectively avoiding false alarms.

[0104] In some embodiments, the above-mentioned fault alarm processing of MOS can be implemented by performing at least one of the following processes: outputting a fault prompt corresponding to the MOS through the vehicle; sending the fault prompt corresponding to the MOS to the vehicle-related user equipment, so that the user equipment outputs the fault prompt corresponding to the MOS.

[0105] Here, fault alarm handling can be achieved through at least one of the following methods:

[0106] 1) Display fault messages corresponding to the MOS (Modular Component) via vehicle output. For example, display the fault message corresponding to the MOS on the vehicle's infotainment display screen; display the fault message corresponding to the MOS on the vehicle's instrument panel; or broadcast the fault message corresponding to the MOS via voice in the vehicle.

[0107] 2) The fault message corresponding to the MOS is sent to the vehicle-related user equipment, so that the user equipment outputs the corresponding fault message. Here, the in-vehicle device can establish direct communication (such as Bluetooth communication) or indirect communication (such as through a server relay) with the vehicle-related user equipment, and send the fault message corresponding to the MOS to the vehicle-related user equipment, so that the user equipment outputs the corresponding fault message, for example, by displaying the fault message corresponding to the MOS on the user equipment's screen, or by outputting the fault message corresponding to the MOS via voice. The relationship between the user equipment and the vehicle can be pre-registered and stored in the in-vehicle device; for example, the driver can pre-register their mobile phone as a vehicle-related user equipment.

[0108] The above methods can improve the flexibility of fault alarm handling, and the specific method of fault alarm handling can be determined according to the needs of actual application scenarios.

[0109] like Figure 3D As shown in the embodiment of this application, when the MOS sticks together, a fault alarm is triggered on the MOS, thereby prompting relevant personnel to deal with the MOS sticking fault in a timely manner, avoiding more serious faults and effectively improving the safety of the vehicle battery.

[0110] The following will describe an exemplary application of the embodiments of this application in a practical application scenario. For ease of explanation, taking a 12V lithium battery as an example, the following is provided: Figure 4A The charging MOS adhesion diagnosis process shown and Figure 4B The discharge MOS adhesion diagnosis process shown will combine Figure 4A as well as Figure 4B Please provide an explanation.

[0111] Step 1) Obtain vehicle data.

[0112] Here, the vehicle data includes: the vehicle's bus network status (i.e., whether the vehicle is in bus network sleep mode); whether the vehicle is in intelligent charging mode; whether the vehicle's DC-DC converter is working; the vehicle's gear status; whether the vehicle is in plug-in charging mode; and the charging current and discharging current values ​​of the 12V lithium battery.

[0113] Step 2) Determine whether the vehicle data meets the preconditions for diagnosing adhesion of the charging MOS and the discharging MOS. When the vehicle data meets the preconditions for diagnosing adhesion of the charging MOS, the charging MOS is triggered to disconnect; when the vehicle data meets the preconditions for diagnosing adhesion of the discharging MOS, the discharging MOS is triggered to disconnect.

[0114] Here, the prerequisites for diagnosing the sticking of the charging MOS include: the vehicle is in bus network sleep mode; the vehicle is not in intelligent charging mode; the discharge current of the 12V lithium battery is between -0.5A and -30mA (corresponding to the first current value range mentioned above) and the duration is greater than or equal to T1ms (corresponding to the first preset duration mentioned above).

[0115] The prerequisites for diagnosing MOSFET adhesion include: the vehicle is parked; the vehicle's DC-DC converter is in operation (BUCK state); the vehicle is in plug-in charging or smart charging mode; and the voltage value at the 12V lithium battery pack terminal is greater than V. max1 (corresponding to the first preset voltage value above); the charging current of the 12V lithium battery is between 2A and 5A (corresponding to the second current value range above), and the duration is greater than or equal to T2ms (corresponding to the second preset duration above).

[0116] T1 and T2 can be set according to the actual application scenario, for example, both can be set to 1.

[0117] Step 3) After the charging MOS is triggered to disconnect, when the absolute value of the voltage difference across the charging MOS is less than V...max2 When the duration of the test is greater than or equal to T3ms (corresponding to the second preset voltage value above) and the duration is greater than or equal to T3ms (corresponding to the third preset duration above), the number of times the charging MOS is diagnosed as sticking is accumulated. When the number of times the charging MOS is diagnosed as sticking reaches N1 times (corresponding to the preset number above), it is determined that the charging MOS is sticking. The same applies to the discharging MOS.

[0118] Step 4) When the charging MOS sticks together, record the charging MOS sticking fault and report the charging MOS sticking fault when the vehicle is in bus network wake-up state (i.e., when the 12V lithium battery is powered on again). The same applies to the discharging MOS.

[0119] For example, when the charging MOS sticks together, the sticking fault variable corresponding to the charging MOS is set to 1 (corresponding to the first state value above) to record the charging MOS sticking fault.

[0120] The embodiments of this application can achieve at least the following technical effects:

[0121] 1) Based on vehicle data, a complete set of logic for diagnosing MOS adhesion in 12V lithium batteries was designed, including entry, judgment and reporting. This can improve the timeliness of adhesion diagnosis and help relevant personnel to discover faults in a timely manner.

[0122] 2) It can improve the accuracy of adhesion diagnosis and reduce the probability of false alarms of adhesion faults.

[0123] The following continues to describe an exemplary structure of the vehicle battery MOS adhesion diagnostic device 455 provided in the embodiments of this application, implemented as a software module. In some embodiments, such as Figure 2 As shown, the software modules in the vehicle battery MOS adhesion diagnostic device 455 stored in the memory 450 may include: an acquisition module 4551, used to acquire vehicle usage data and power consumption data related to the battery in the vehicle; wherein the vehicle is powered by the battery, and the battery controls the current flow through MOS; a first judgment module 4552, used to determine whether the MOS adhesion diagnostic prerequisites are met based on the usage data and power consumption data; wherein the MOS adhesion diagnostic prerequisites include vehicle safety conditions for constraining the usage data and MOS safety conditions for constraining the power consumption data; a disconnection module 4553, used to perform a disconnection operation on the MOS when the MOS adhesion diagnostic prerequisites are met; and a second judgment module 4554, used to determine whether the MOS has adhered based on the voltage difference across the MOS after the disconnection operation.

[0124] In some embodiments, the battery controls the on / off state of the charging current through the charging MOS and the on / off state of the discharging current through the discharging MOS; the first judgment module 4552 is further configured to: determine whether the preconditions for the adhesion diagnosis of the charging MOS and the preconditions for the adhesion diagnosis of the discharging MOS are met based on the vehicle usage data and the power consumption data; the disconnection module 4553 is further configured to: perform a disconnection operation on the charging MOS when the preconditions for the adhesion diagnosis of the charging MOS are met; and perform a disconnection operation on the discharging MOS when the preconditions for the adhesion diagnosis of the discharging MOS are met.

[0125] In some embodiments, vehicle usage data includes the vehicle's bus network status and gear position status; power usage data includes at least one of the following: whether the vehicle is in a charging state, whether the vehicle's DC-DC converter is in a working state, the current value of the battery's charging and discharging current, and the voltage value of the battery's interface voltage; the vehicle safety conditions in the preconditions for diagnosing the adhesion of the charging MOS include: the vehicle's bus network status is in a dormant state; the MOS safety conditions in the preconditions for diagnosing the adhesion of the charging MOS include at least one of the following: the vehicle is not in a charging state; the current value of the battery's discharging current is within a first current value range and its duration is greater than or equal to a first preset duration; the vehicle safety conditions in the preconditions for diagnosing the adhesion of the discharging MOS include: the vehicle's gear position is in a parked state; the MOS safety conditions in the preconditions for diagnosing the adhesion of the discharging MOS include at least one of the following: the vehicle's DC-DC converter is in a working state; the vehicle is in a charging state; the voltage value of the battery's interface voltage is greater than a first preset voltage value; the current value of the battery's charging current is within a second current value range and its duration is greater than or equal to a second preset duration.

[0126] In some embodiments, the second determination module 4554 is further configured to: accumulate the number of times the MOS is stuck when the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is less than the second preset voltage value and the duration is greater than or equal to the third preset duration, and determine that the MOS is stuck when the number of times the MOS is stuck reaches the preset number; and determine that the MOS is not stuck when the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or the duration of the absolute value of the voltage difference between the two ends being less than the second preset voltage value is less than the third preset duration.

[0127] In some embodiments, the second judgment module 4554 is further configured to: when the number of adhesion diagnoses of the MOS has not reached a preset number, perform a closing operation on the MOS and return to the step of obtaining vehicle usage data and power consumption data related to the battery in the vehicle.

[0128] In some embodiments, the second judgment module 4554 is further configured to: reset the number of adhesion diagnoses of MOS to zero.

[0129] In some embodiments, the second determination module 4554 is further configured to: determine that the MOS has stuck when the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is less than the second preset voltage value and the duration is greater than or equal to the third preset duration; and determine that the MOS has not stuck when the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or the duration of the absolute value of the voltage difference between the two ends being less than the second preset voltage value is less than the third preset duration.

[0130] In some embodiments, the vehicle battery MOS adhesion diagnostic device 455 further includes a fault alarm module for: performing fault alarm processing on the MOS when adhesion occurs.

[0131] In some embodiments, the fault alarm module is further configured to: when the MOS sticks together, set the sticking fault variable corresponding to the MOS to a first state value; when the battery is powered on again, read the sticking fault variable corresponding to the MOS, and trigger fault alarm processing on the MOS according to the read first state value.

[0132] In some embodiments, the vehicle battery MOS adhesion diagnostic device 455 further includes an initialization module for setting the adhesion fault variable corresponding to the MOS to a second state value when the MOS is not stuck.

[0133] In some embodiments, the fault alarm module is further configured to: perform at least one of the following processes: output a fault indication corresponding to the MOS through the vehicle; send the fault indication corresponding to the MOS to the vehicle-related user equipment, so that the user equipment outputs the fault indication corresponding to the MOS.

[0134] This application provides a computer program product or computer program, which includes executable instructions stored in a computer-readable storage medium. The processor of an electronic device reads the executable instructions from the computer-readable storage medium and executes the executable instructions, causing the electronic device to implement the MOS adhesion diagnosis method for vehicle batteries described in this application.

[0135] This application provides a computer-readable storage medium storing executable instructions. When the executable instructions are executed by a processor, the processor will implement the MOS adhesion diagnosis method for vehicle batteries provided in this application.

[0136] In some embodiments, the computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or it may be a variety of devices including one or any combination of the above-mentioned memories.

[0137] In some embodiments, executable instructions may take the form of a program, software, software module, script, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a standalone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.

[0138] As an example, executable instructions may, but do not necessarily, correspond to files in a file system. They may be stored as part of a file that holds other programs or data, for example, in one or more scripts in a Hyper Text Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple collaborating files (e.g., a file that stores one or more modules, subroutines, or code sections).

[0139] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of this application are included within the scope of protection of this application.

Claims

1. A MOS adhesion diagnosis method of a vehicle battery, characterized by, include: Acquire vehicle usage data and power consumption data related to the battery in the vehicle; wherein the vehicle is powered by a battery, and the battery controls the current flow through a MOS. Based on the vehicle usage data and the power consumption data, it is determined whether the preconditions for MOS adhesion diagnosis are met; wherein, the preconditions for MOS adhesion diagnosis include vehicle safety conditions for constraining the vehicle usage data and MOS safety conditions for constraining the power consumption data; When the preconditions for MOS adhesion diagnosis are met, a disconnection operation is performed on the MOS; The sticking of the MOS is determined by the voltage difference between its two ends after the disconnection operation.

2. The method of claim 1, wherein, The battery controls the charging current through a charging MOS and the discharging current through a discharging MOS. The step of determining whether the preconditions for MOS adhesion diagnosis are met based on the vehicle usage data and the power consumption data includes: Based on the vehicle usage data and the power consumption data, determine whether the preconditions for diagnosing adhesion of the charging MOS and the preconditions for diagnosing adhesion of the discharging MOS are met. When the adhesion diagnosis preconditions of the MOS are met, the disconnection operation on the MOS is performed, including: When the preconditions for diagnosing adhesion of the charging MOS are met, a disconnection operation is performed on the charging MOS; When the preconditions for diagnosing adhesion of the discharge MOS are met, a disconnection operation is performed on the discharge MOS.

3. The method of claim 2, wherein, The vehicle usage data includes the vehicle's bus network status and gear status; the power usage data includes at least one of the following: whether the vehicle is in a charging state, whether the vehicle's DC-DC converter is in a working state, the current value of the battery's charging and discharging current, and the voltage value of the battery's interface voltage. The vehicle safety conditions in the preconditions for the adhesion diagnosis of the charging MOS include: the bus network status of the vehicle is in a dormant state; the MOS safety conditions in the preconditions for the adhesion diagnosis of the charging MOS include at least one of the following: the vehicle is not in a charging state; the discharge current of the battery is located in a first current value range and the duration is greater than or equal to a first preset duration. The vehicle safety conditions in the preconditions for the adhesion diagnosis of the discharge MOS include: the vehicle is in a parked state; the MOS safety conditions in the preconditions for the adhesion diagnosis of the discharge MOS include at least one of the following: the DC-DC converter of the vehicle is in a working state; the vehicle is in a charging state; the voltage value of the battery interface voltage is greater than a first preset voltage value; the current value of the battery charging current is in a second current value range, and the duration is greater than or equal to a second preset duration.

4. The method of claim 1, wherein, The step of determining whether the MOS has stuck together based on the voltage difference across its terminals after the disconnection operation includes: When the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is less than the second preset voltage value and the duration is greater than or equal to the third preset duration, the number of adhesion diagnosis of the MOS is accumulated, and when the number of adhesion diagnosis of the MOS reaches the preset number, it is determined that the MOS has adhered. When the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or the duration for which the absolute value of the voltage difference between the two ends is less than the second preset voltage value is less than the third preset duration, it is determined that the MOS has not stuck together.

5. The method of claim 4, wherein, After accumulating the number of adhesion diagnoses of the MOS, the method further includes: When the number of adhesion diagnostics of the MOS does not reach the preset number, a closing operation is performed on the MOS, and the process returns to the steps of obtaining vehicle usage data and power consumption data related to the battery in the vehicle.

6. The method according to claim 4, characterized in that, When it is determined that the MOS has not adhered, the method further includes: The number of adhesion diagnostics for the MOS is reset to zero.

7. The method according to claim 1, characterized in that, The step of determining whether the MOS has stuck together based on the voltage difference across its terminals after the disconnection operation includes: When the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is less than the second preset voltage value and the duration is greater than or equal to the third preset duration, it is determined that the MOS has stuck together. When the absolute value of the voltage difference between the two ends of the MOS after the disconnection operation is greater than or equal to the second preset voltage value, or the duration for which the absolute value of the voltage difference between the two ends is less than the second preset voltage value is less than the third preset duration, it is determined that the MOS has not stuck together.

8. The method according to claim 1, characterized in that, After determining whether the MOS has stuck together based on the voltage difference across its terminals after the disconnection operation, the method further includes: When the MOS transistor sticks together, a fault alarm is triggered.

9. The method according to claim 8, characterized in that, When the MOS transistor sticks together, the fault alarm processing for the MOS transistor includes: When the MOS sticks together, the sticking fault variable corresponding to the MOS is set to the first state value; When the battery is powered on again, the sticking fault variable corresponding to the MOS is read, and the fault alarm processing of the MOS is triggered according to the read first state value.

10. The method according to claim 9, characterized in that, After determining whether the MOS has stuck together based on the voltage difference across its terminals after the disconnection operation, the method further includes: When the MOS does not stick together, the sticking fault variable corresponding to the MOS is set to the second state value.

11. The method according to claim 8, characterized in that, The fault alarm processing for the MOS includes: Perform at least one of the following processes: The vehicle outputs the fault indication corresponding to the MOS. The fault message corresponding to the MOS is sent to the user equipment related to the vehicle, so that the user equipment outputs the fault message corresponding to the MOS.

12. A diagnostic device for MOS adhesion in vehicle batteries, characterized in that, include: The acquisition module is used to acquire vehicle usage data and power consumption data related to the battery in the vehicle; wherein the vehicle is powered by a battery, and the battery controls the current flow through a MOS. The first judgment module is used to determine whether the adhesion diagnosis prerequisites of the MOS are met based on the vehicle usage data and the power consumption data; wherein, the adhesion diagnosis prerequisites of the MOS include vehicle safety conditions for constraining the vehicle usage data and MOS safety conditions for constraining the power consumption data. The disconnect module is used to perform a disconnect operation on the MOS when the adhesion diagnosis preconditions of the MOS are met; The second judgment module is used to determine whether the MOS has stuck together based on the voltage difference between its two ends after the MOS performs a disconnection operation.

13. An electronic device, characterized in that, include: Memory, used to store executable instructions; A processor, when executing executable instructions stored in the memory, implements the method according to any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that, It stores executable instructions for implementing the method of any one of claims 1 to 11 when executed by a processor.

15. A computer program product, characterized in that, Includes executable instructions, which, when executed by a processor, implement the method of any one of claims 1 to 11.

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