Vehicle-mounted low-voltage power supply health state detection method, system, device and storage medium

Abstract

The application discloses a vehicle-mounted low-voltage power supply health state detection method, system and device and a storage medium, and comprises the following steps: determining that a target vehicle is in a waiting hibernation state, acquiring the current state of charge and the current current of the low-voltage power supply of the target vehicle, and determining the current charge capacity of the low-voltage power supply; when it is detected that the low-voltage load of the target vehicle is in a fault state, acquiring the dark current parameter, the minimum starting charge capacity and the current environment temperature of the low-voltage power supply; determining the environment temperature attenuation coefficient according to the current environment temperature, and predicting the power loss time according to the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter and the environment temperature attenuation coefficient; determining the power supply health state of the low-voltage power supply according to the power loss time, and then feeding back the power supply health state to the owner of the target vehicle. The application can accurately evaluate the health state of the low-voltage power supply and push it to the user, improve the travel efficiency and experience of the user, and can be applied to the technical field of electric vehicles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and in particular to a vehicle-mounted low-voltage power supply health state detection method, system, device and storage medium. BACKGROUND

[0002] With the rapid development of the automobile industry, electric vehicles are increasingly chosen by people due to their environmental protection and low travel cost. The low-voltage 12V power supply of an electric vehicle is used to provide energy for starting the vehicle during the vehicle driving / charging starting stage. At present, the low-voltage 12V power supply of an electric vehicle mostly adopts a lead-acid / lithium battery scheme. When a low-voltage load fault (such as a short circuit between the positive electrode of the low-voltage load power supply side and the positive electrode of the 12V power supply) occurs in an electric vehicle, although the vehicle controller can detect and remind the low-voltage load fault, it cannot predict the time (i.e., the power loss time) when the low-voltage power supply may be in a power loss state according to the real-time fault state of the vehicle, nor can it remind the user to timely maintain the low-voltage power supply. The low-voltage load fault will increase the dark current, and in severe cases, it may cause the user to be unable to start the vehicle due to the power loss of the low-voltage power supply without any reminder, which greatly affects the travel efficiency and travel of the user. SUMMARY

[0003] The present application aims to at least partially solve one of the problems in the prior art.

[0004] To this end, one object of the embodiments of the present application is to provide a vehicle-mounted low-voltage power supply health state detection method, which can accurately evaluate the health state of the low-voltage power supply by predicting the power loss time of the low-voltage power supply, thereby improving the travel efficiency and travel experience of the user.

[0005] Another object of the embodiments of the present application is to provide a vehicle-mounted low-voltage power supply health state detection system.

[0006] In order to achieve the above technical purpose, the technical solutions adopted by the embodiments of the present application include:

[0007] In a first aspect, the embodiments of the present application provide a vehicle-mounted low-voltage power supply health state detection method, including the following steps:

[0008] When it is determined that the target vehicle is in a waiting hibernation state, the current state of charge and the current of the low-voltage power supply of the target vehicle are obtained, and the current charge capacity of the low-voltage power supply is determined according to the current state of charge and the rated charge capacity of the low-voltage power supply;

[0009] When it is detected that the low-voltage load of the target vehicle is in a fault state, the dark current parameter, the minimum starting charge capacity and the current environmental temperature of the low-voltage power supply are obtained;

[0010] determining an ambient temperature decay coefficient according to the current ambient temperature, and predicting a power loss time according to the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter, and the ambient temperature decay coefficient;

[0011] determining a power supply health state of the low-voltage power supply according to the power loss time, and feeding back the power supply health state to an owner of the target vehicle.

[0012] Further, in an embodiment of the present application, the step of determining that the target vehicle is in a waiting hibernation state and acquiring a current state of charge and a current current of a low-voltage power supply of the target vehicle specifically comprises:

[0013] monitoring a current working state of the target vehicle in real time by a vehicle controller;

[0014] acquiring the current state of charge and the current current of the low-voltage power supply of the target vehicle by a power management system when it is determined that the target vehicle is in the waiting hibernation state;

[0015] wherein the vehicle controller is in communication connection with the power management system, and the power management system is in electrical connection with the low-voltage power supply.

[0016] Further, in an embodiment of the present application, the current charge capacity is determined by the following formula:

[0017] Q Pre_sleep = SOC Pre_sleep × Q rated

[0018] wherein Q Pre_sleep represents the current charge capacity, SOC Pre_sleep represents the current state of charge, and Q rated represents a rated charge capacity.

[0019] Further, in an embodiment of the present application, the step of acquiring a dark current parameter, a minimum starting charge capacity, and a current ambient temperature of the low-voltage power supply when it is detected that a low-voltage load of the target vehicle is in a fault state specifically comprises:

[0020] monitoring a current load state of the low-voltage load of the target vehicle in real time by the vehicle controller;

[0021] acquiring the dark current parameter and the minimum starting charge capacity of the low-voltage power supply by the power management system when it is determined that the low-voltage load is in the fault state;

[0022] acquiring the current ambient temperature by a temperature sensor arranged on a vehicle body of the target vehicle;

[0023] The temperature sensor is in communication connection with the vehicle controller.

[0024] Further, in an embodiment of the present application, the step of determining an ambient temperature attenuation coefficient according to the current ambient temperature, and predicting the power depletion time according to the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter and the ambient temperature attenuation coefficient specifically comprises:

[0025] determining a corresponding ambient temperature attenuation coefficient according to the current ambient temperature and a preset first mapping relationship;

[0026] predicting the power depletion time by the following formula:

[0027]

[0028] wherein, T loss represents the power depletion time, Q Pre_sleep represents the current charge capacity, Q start represents the minimum starting charge capacity, I Pre_sleep represents the current current, I DarkC_ini represents the dark current parameter, η T_amb represents the ambient temperature attenuation coefficient.

[0029] Further, in an embodiment of the present application, the step of determining the power supply health state of the low-voltage power supply according to the power depletion time, and further feeding back the power supply health state to the owner of the target vehicle specifically comprises:

[0030] when the power depletion time is greater than or equal to a preset first threshold value and less than a preset second threshold value, determining that the low-voltage power supply is in a sub-healthy state, and reminding the owner of the target vehicle through a vehicle terminal or a user terminal that the low-voltage power supply needs to be overhauled;

[0031] when the power depletion time is greater than or equal to the second threshold value, determining that the low-voltage power supply is in an unhealthy state, and reminding the owner through the vehicle terminal or the user terminal that the low-voltage power supply needs to be replaced.

[0032] Further, in an embodiment of the present application, the vehicle low-voltage power supply health state detection method further comprises the following steps:

[0033] when the power depletion time is less than the first threshold value, increasing the power depletion count value of the low-voltage power supply by 1, and if the power depletion count value reaches a preset third threshold value, reminding the owner through the vehicle terminal or the user terminal that the low-voltage power supply needs to be overhauled;

[0034] The power shortage times count value is reset to 0 after the low-voltage power supply is maintained or replaced.

[0035] In a second aspect, an embodiment of the present application provides a vehicle-mounted low-voltage power supply health state detection system, comprising:

[0036] A first data acquisition module is configured to determine that a target vehicle is in a waiting hibernation state, acquire a current state of charge and a current current of a low-voltage power supply of the target vehicle, and determine a current charge capacity of the low-voltage power supply according to the current state of charge and a rated charge capacity of the low-voltage power supply.

[0037] A second data acquisition module is configured to acquire a dark current parameter, a minimum starting charge capacity and a current ambient temperature of the low-voltage power supply when detecting that a low-voltage load of the target vehicle is in a fault state.

[0038] A power shortage time prediction module is configured to determine an ambient temperature attenuation coefficient according to the current ambient temperature, and predict a power shortage time according to the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter and the ambient temperature attenuation coefficient.

[0039] A power supply health determination module is configured to determine a power supply health state of the low-voltage power supply according to the power shortage time, and feed back the power supply health state to an owner of the target vehicle.

[0040] In a third aspect, an embodiment of the present application provides a vehicle-mounted low-voltage power supply health state detection device, comprising:

[0041] At least one processor;

[0042] At least one memory configured to store at least one program;

[0043] When the at least one program is executed by the at least one processor, the at least one processor is caused to implement the vehicle-mounted low-voltage power supply health state detection method.

[0044] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, wherein a processor executable program is stored, and the processor executable program is used to execute the vehicle-mounted low-voltage power supply health state detection method when executed by a processor.

[0045] The advantages and beneficial effects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application:

[0046] The embodiment of the present application determines that the target vehicle is in a waiting hibernation state, acquires the current state of charge and the current current of the low-voltage power supply of the target vehicle, and determines the current charge capacity of the low-voltage power supply according to the current state of charge and the rated charge capacity of the low-voltage power supply. When it is detected that the low-voltage load of the target vehicle is in a fault state, the dark current parameter, the minimum starting charge capacity and the current environmental temperature of the low-voltage power supply are acquired, the environmental temperature attenuation coefficient is determined according to the current environmental temperature, and the power loss time is predicted according to the current charge capacity, the minimum starting charge capacity, the current, the dark current parameter and the environmental temperature attenuation coefficient. Then, the power supply health state of the low-voltage power supply is determined according to the power loss time, and the power supply health state is fed back to the owner of the target vehicle. The embodiment of the present application can predict the power loss time of the low-voltage power supply according to the real-time fault state of the vehicle, so as to accurately evaluate the health state of the low-voltage power supply and push it to the user, avoiding the vehicle from being unable to start due to the power loss of the low-voltage power supply, and improving the travel efficiency and experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following introduces the drawings needed to be used in the embodiments of the present application as follows. It should be understood that the drawings introduced in the following are only for facilitating the clear description of part of the embodiments in the technical solutions of the present application, and for the person skilled in the art, other drawings can also be obtained without paying creative labor on the premise.

[0048] Figure 1 A step flow chart of a vehicle-mounted low-voltage power supply health state detection method provided by the embodiment of the present application is provided.

[0049] Figure 2 A structural block diagram of a vehicle-mounted low-voltage power supply health state detection system provided by the embodiment of the present application is provided.

[0050] Figure 3 A structural block diagram of a vehicle-mounted low-voltage power supply health state detection device provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0051] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. For the step numbers in the following embodiments, they are only set for facilitating the description and explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of the person skilled in the art.

[0052] In the description of the present application, the meaning of plurality is two or more, if there is a description to the first, the second is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of the indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art.

[0053] Referring to Figure 1 , the embodiment of the present application provides a kind of vehicle-mounted low-voltage power supply health state detection method, specifically comprising the following steps:

[0054] S101, determine that target vehicle is in waiting hibernation state, obtain the current charge state and current of the low-voltage power supply of target vehicle, and determine the current charge capacity of low-voltage power supply according to current charge state and rated charge capacity of low-voltage power supply.

[0055] Further as optional implementation, the step of determining that target vehicle is in waiting hibernation state, obtaining the current charge state and current of the low-voltage power supply of target vehicle specifically includes:

[0056] real-time monitoring the current working state of target vehicle by vehicle controller;

[0057] when determining that target vehicle is in waiting hibernation state, the current charge state and current of the low-voltage power supply of target vehicle are obtained by power management system;

[0058] Wherein, vehicle controller and power management system are in communication connection, and power management system and low-voltage power supply are in electrical connection.

[0059] Specifically, when vehicle controller determines that vehicle is in waiting hibernation phase of this working cycle, the current charge state and current uploaded by power management system of low-voltage power supply are read, and the current charge capacity of the voltage power supply can be calculated in combination with rated charge capacity of low-voltage power supply.

[0060] Further as optional implementation, current charge capacity is determined by the following formula:

[0061] Q Pre_sleep = SOC Pre_sleep ×Q rated

[0062] Wherein, Q Pre_sleep Indicates current charge capacity, SOC Pre_sleep Indicates current charge state, Q rated Indicates rated charge capacity.

[0063] S102, when detecting that the low-voltage load of the target vehicle is in a fault state, acquiring a dark current parameter, a minimum starting charge capacity and a current environment temperature of the low-voltage power supply.

[0064] Specifically, the vehicle controller can monitor the current load state of the low-voltage load of the target vehicle in real time, so as to determine whether the low-voltage load fails, for example, detecting the current and voltage of the low-voltage load, so as to determine whether it is short-circuited or leaked, etc. The detection process of the low-voltage load failure in the embodiment of the application is not limited. Step S102 specifically includes the following steps:

[0065] S1021, monitoring the current load state of the low-voltage load of the target vehicle in real time through the vehicle controller;

[0066] S1022, when it is determined that the low-voltage load is in a fault state, acquiring the dark current parameter and the minimum starting charge capacity of the low-voltage power supply through the power management system;

[0067] S1023, acquiring the current environment temperature through the temperature sensor arranged on the vehicle body of the target vehicle;

[0068] The temperature sensor is in communication connection with the vehicle controller.

[0069] Specifically, when detecting that the low-voltage load fails, the dark current parameter and the minimum starting charge capacity uploaded by the power management system are read through the vehicle controller, wherein the dark current parameter reflects the increase amplitude of the dark current, and the minimum starting charge capacity represents the minimum limit value of the charge capacity required to start the target vehicle. The current environment temperature is detected by the temperature sensor arranged on the vehicle body of the target vehicle, and the current environment temperature affects the value of the environment temperature decay coefficient.

[0070] S103, determining the environment temperature decay coefficient according to the current environment temperature, and predicting the power shortage time according to the current charge capacity, the minimum starting charge capacity, the current, the dark current parameter and the environment temperature decay coefficient.

[0071] Specifically, the mapping relationship between the current environment temperature and the environment temperature decay coefficient can be constructed in advance, and when the current environment temperature is detected, the corresponding environment temperature decay coefficient is determined for the estimation of the power shortage time. Step S103 specifically includes the following steps:

[0072] S1031, determining the corresponding environment temperature decay coefficient according to the current environment temperature and the preset first mapping relationship;

[0073] S1032, predicting the power shortage time by the following formula:

[0074]

[0075] T = (I - I0) / (I0 * K)loss represents the time of power shortage, Q Pre_sleep represents the current charge capacity, Q start represents the minimum starting charge capacity, I Pre_sleep represents the current, I DarkC_ini represents the dark current parameter, η T_amb represents the ambient temperature attenuation coefficient.

[0076] S104, determining the power health status of the low-voltage power supply according to the time of power shortage, and feeding back the power health status to the owner of the target vehicle.

[0077] Specifically, it is judged according to the estimated time of power shortage whether the low-voltage power supply is in a sub-healthy state or an unhealthy state, and the result is fed back to the owner of the target vehicle, so as to remind the owner to timely overhaul or replace the low-voltage power supply. Step S104 specifically includes the following steps:

[0078] S1041, when the time of power shortage is greater than or equal to a preset first threshold and less than a preset second threshold, it is determined that the low-voltage power supply is in a sub-healthy state, and the owner of the target vehicle is reminded through the vehicle terminal or the user terminal that the low-voltage power supply needs to be overhauled;

[0079] S1042, when the time of power shortage is greater than or equal to the second threshold, it is determined that the low-voltage power supply is in an unhealthy state, and the owner is reminded through the vehicle terminal or the user terminal that the low-voltage power supply needs to be replaced.

[0080] Specifically, the first threshold and the second threshold can be preset, for example, the first threshold is 30 min, and the second threshold is 60 min, which is not limited in the embodiments of the present application.

[0081] Further as an optional embodiment, the vehicle low-voltage power supply health status detection method further includes the following steps:

[0082] When the time of power shortage is less than the first threshold, the power shortage count value of the low-voltage power supply is increased by 1, and if the power shortage count value reaches a preset third threshold, the owner is reminded through the vehicle terminal or the user terminal that the low-voltage power supply needs to be overhauled;

[0083] Wherein, the power shortage count value is reset to 0 after the low-voltage power supply is overhauled or replaced.

[0084] Specifically, when the time of power shortage is less than the first threshold, it indicates that the time of power shortage caused by this time low-voltage load failure is relatively short, at this time, the power shortage count is counted, and when the power shortage count value reaches the third threshold (such as 10 times), the owner is reminded that the low-voltage power supply needs to be overhauled.

[0085] The method steps of the embodiment of the application are described above. It can be recognized that the embodiment of the application can predict the power loss time of the low-voltage power supply according to the real-time fault state of the vehicle, so that the health state of the low-voltage power supply can be accurately evaluated and pushed to the user, avoiding the vehicle from being unable to start due to power loss of the low-voltage power supply, and improving the travel efficiency and travel experience of the user.

[0086] With reference to Figure 2 The embodiment of the application provides a vehicle-mounted low-voltage power supply health state detection system, which comprises:

[0087] A first data acquisition module is configured to determine that a target vehicle is in a waiting hibernation state, acquire a current state of charge and a current current of a low-voltage power supply of the target vehicle, and determine a current charge capacity of the low-voltage power supply according to the current state of charge and a rated charge capacity of the low-voltage power supply.

[0088] A second data acquisition module is configured to acquire a dark current parameter, a minimum starting charge capacity and a current environment temperature of the low-voltage power supply when detecting that a low-voltage load of the target vehicle is in a fault state.

[0089] A power loss time prediction module is configured to determine an environment temperature attenuation coefficient according to the current environment temperature, and predict a power loss time according to the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter and the environment temperature attenuation coefficient.

[0090] A power supply health determination module is configured to determine a power supply health state of the low-voltage power supply according to the power loss time, and then feed back the power supply health state to an owner of the target vehicle.

[0091] The contents in the method embodiment are applicable to the system embodiment, the system embodiment specifically realizes the same functions as the method embodiment, and achieves the same beneficial effects as the method embodiment.

[0092] With reference to Figure 3 The embodiment of the application provides a vehicle-mounted low-voltage power supply health state detection device, which comprises:

[0093] At least one processor;

[0094] At least one memory is configured to store at least one program;

[0095] When the at least one program is executed by the at least one processor, the at least one processor implements the vehicle-mounted low-voltage power supply health state detection method.

[0096] The contents in the method embodiments are applicable to the device embodiments, the device embodiments specifically implement the same functions as the method embodiments, and achieve the same beneficial effects as the method embodiments.

[0097] The embodiment of the application further provides a computer readable storage medium, wherein a processor executable program is stored, the processor executable program is used for executing the vehicle-mounted low-voltage power supply health state detection method when executed by a processor.

[0098] The computer readable storage medium of the embodiment of the application can execute the vehicle-mounted low-voltage power supply health state detection method provided by the method embodiment of the application, can execute the step of any combination of the method embodiment, has the corresponding functions and beneficial effects of the method.

[0099] The embodiment of the application further discloses a computer program product or a computer program, the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer readable storage medium. The processor of the computer equipment can read the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer equipment executes the method shown in the figure. Figure 1 The method shown in the figure.

[0100] In some alternative embodiments, the functions / operations mentioned in the block diagram can not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, two blocks shown in succession can actually be executed substantially simultaneously or the above blocks can be executed in reverse order at times. In addition, the embodiments presented and described in the flowcharts of the application are provided by way of example, with the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operations and logical flows presented herein. Alternative embodiments are contemplated, in which the order of various operations is changed and in which sub-operations described as part of larger operations are independently executed.

[0101] Furthermore, although the present application is described in the context of functional modules, it is to be understood that one or more of the functions and / or features described above can be integrated in a single physical device and / or software module, or one or more functions and / or features can be implemented in separate physical devices or software modules. It will also be appreciated that detailed discussion of the actual implementation of each module is unnecessary to an understanding of the present application. Rather, the actual implementation of the modules, in conjunction with their attributes, functions, and internal relationships, are to be understood within the context of the devices disclosed herein. Thus, those skilled in the art with access to the teachings presented herein will be able to devise suitable implementations of the present application without undue experimentation. It is also to be understood that the particular concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is defined by the appended claims and equivalents thereof.

[0102] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0103] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a list of executable instructions for implementing logic functions, which can be specifically embodied in any computer readable medium for use by an instruction execution system, device or apparatus, such as a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, device or apparatus, or in conjunction with these instructions execution system, device or apparatus. For the purpose of this specification, "computer readable medium" can be any device that can contain, store, communicate, propagate or transport programs for use by an instruction execution system, device or apparatus, or in conjunction with these instruction execution system, device or apparatus.

[0104] More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can also be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example, via optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

[0105] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations thereof. In the above described embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any of the following technologies, or combinations thereof, can be used with the necessary modifications: a discrete logic circuit(s) having logic gates for implementing logic functions upon an application of data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), and / or the like.

[0106] In the above description of the present specification, reference to the description of the terms "one embodiment", "another embodiment", or "certain embodiments" or the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The illustrative appearances of the above described terms in the present specification are not necessarily referred to the same embodiment or example. Also, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0107] Although embodiments of the present application have been shown and described, it would be recognized by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made to the embodiments without departing from the spirit and scope of the application, which is defined by the claims and their equivalents.

[0108] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present application, and these equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. A method for detecting the health status of an on-board low-voltage power supply, characterized in that, Includes the following steps: The target vehicle is determined to be in a waiting and dormant state. The current state of charge and current current of the low-voltage power supply of the target vehicle are obtained, and the current charge capacity of the low-voltage power supply is determined based on the current state of charge and the rated charge capacity of the low-voltage power supply. When the low-voltage load of the target vehicle is detected to be in a fault state, the dark current parameters, minimum starting charge capacity and current ambient temperature of the low-voltage power supply are obtained. The ambient temperature decay coefficient is determined based on the current ambient temperature, and the depletion time is predicted based on the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter, and the ambient temperature decay coefficient. The power health status of the low-voltage power supply is determined based on the power loss time, and then the power health status is fed back to the owner of the target vehicle. The step of determining the ambient temperature decay coefficient based on the current ambient temperature, and predicting the depletion time based on the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter, and the ambient temperature decay coefficient, specifically includes: The corresponding ambient temperature attenuation coefficient is determined based on the current ambient temperature and the preset first mapping relationship. The power depletion time is predicted using the following formula: Among them, T loss Q represents the time of power depletion. Pre_sleep Q represents the current charge capacity. start I represents the minimum starting charge capacity. Pre_sleep I represents the current current. DarkC_ini η represents the dark current parameter. T_amb This represents the ambient temperature attenuation coefficient.

2. The method for detecting the health status of an on-board low-voltage power supply according to claim 1, characterized in that, The step of determining that the target vehicle is in a waiting sleep state and obtaining the current state of charge and current current of the target vehicle's low-voltage power supply specifically includes: The current operating status of the target vehicle is monitored in real time through the vehicle controller; When it is determined that the target vehicle is in a waiting sleep state, the current state of charge and current current of the low-voltage power supply of the target vehicle are obtained through the power management system. The vehicle controller is communicatively connected to the power management system, and the power management system is electrically connected to the low-voltage power supply.

3. The method for detecting the health status of an on-board low-voltage power supply according to claim 1, characterized in that, The current charge capacity is determined by the following formula: Q Pre_sleep =SOC Pre_sleep ×Q rated Among them, Q Pre_sleep The current charge capacity, SOC Pre_sleep Q represents the current state of charge. rated This indicates the rated charge capacity.

4. The method for detecting the health status of a vehicle-mounted low-voltage power supply according to claim 2, characterized in that, The step of obtaining the dark current parameters, minimum starting charge capacity, and current ambient temperature of the low-voltage power supply when the low-voltage load of the target vehicle is detected to be in a fault state specifically includes: The vehicle controller monitors the current load status of the low-voltage load of the target vehicle in real time. When it is determined that the low-voltage load is in a fault state, the dark current parameters and minimum starting charge capacity of the low-voltage power supply are obtained through the power management system. The current ambient temperature is obtained by a temperature sensor installed on the body of the target vehicle; The temperature sensor is communicatively connected to the vehicle controller.

5. A method for detecting the health status of an on-board low-voltage power supply according to any one of claims 1 to 4, characterized in that, The step of determining the power health status of the low-voltage power supply based on the power loss time, and then feeding back the power health status to the owner of the target vehicle, specifically includes: When the power loss time is greater than or equal to a preset first threshold and less than a preset second threshold, the low-voltage power supply is determined to be in a sub-healthy state, and the owner of the target vehicle is reminded through the vehicle terminal or user terminal that the low-voltage power supply needs to be inspected. When the power depletion time is greater than or equal to the second threshold, it is determined that the low-voltage power supply is in an unhealthy state, and the vehicle owner is reminded through the vehicle terminal or the user terminal that the low-voltage power supply needs to be replaced.

6. The method for detecting the health status of an on-board low-voltage power supply according to claim 5, characterized in that, The method for detecting the health status of on-board low-voltage power supplies also includes the following steps: When the power loss time is less than the first threshold, the power loss count of the low-voltage power supply is increased by 1. If the power loss count reaches the preset third threshold, the vehicle owner is reminded through the vehicle terminal or the user terminal that the low-voltage power supply needs to be inspected. The count of power loss events is set to 0 after the low-voltage power supply is inspected or replaced.

7. A vehicle-mounted low-voltage power supply health status detection system, characterized in that, include: The first data acquisition module is used to determine that the target vehicle is in a waiting hibernation state, acquire the current state of charge and current current of the low-voltage power supply of the target vehicle, and determine the current charge capacity of the low-voltage power supply based on the current state of charge and the rated charge capacity of the low-voltage power supply. The second data acquisition module is used to acquire the dark current parameters, minimum starting charge capacity and current ambient temperature of the low-voltage power supply when the low-voltage load of the target vehicle is detected to be in a fault state. The power depletion time prediction module is used to determine the ambient temperature decay coefficient based on the current ambient temperature, and to predict the power depletion time based on the current charge capacity, the minimum starting charge capacity, the current current, the dark current parameter, and the ambient temperature decay coefficient. A power health determination module is used to determine the power health status of the low-voltage power supply based on the power loss time, and then feed back the power health status to the owner of the target vehicle. The power outage time prediction module is specifically used for: The corresponding ambient temperature attenuation coefficient is determined based on the current ambient temperature and the preset first mapping relationship. The power depletion time is predicted using the following formula: Among them, T loss Q represents the time of power depletion. Pre_sleep Q represents the current charge capacity. start I represents the minimum starting charge capacity. Pre_sleep I represents the current current. DarkC_ini η represents the dark current parameter. T_amb This represents the ambient temperature attenuation coefficient.

8. A vehicle-mounted low-voltage power supply health status detection device, characterized in that, include: At least one processor; At least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements a method for detecting the health status of an on-board low-voltage power supply as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a processor-executable program, characterized in that, The processor-executable program, when executed by the processor, is used to perform a method for detecting the health status of an on-board low-voltage power supply as described in any one of claims 1 to 6.

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