Health degree determination method, device and equipment, low-voltage power supply system and medium

Abstract

The invention discloses a health degree determination method, device and equipment, a low-voltage power supply system and a medium, and the method comprises the steps: obtaining the current value of a health degree influence parameter of a power supply channel corresponding to the low-voltage power supply system; and determining the current health degree of the power supply channel by using the health degree influence parameter current value of the power supply channel. According to the technical scheme, the health degree influence parameter current value of the power supply channel corresponding to the low-voltage power supply system in the vehicle is obtained, quantitative analysis is achieved through the obtained health degree influence parameter current value of the power supply channel, and the health degree of the corresponding power supply channel in the low-voltage power supply system is determined. And accurate health parameters are provided for drivers and maintenance personnel, so that the drivers and the maintenance personnel can conveniently perform vehicle inspection and / or vehicle maintenance and the like according to the current health condition, the real fault and failure occurrence rate of the low-voltage power supply system is reduced, and the safety and reliability of vehicle driving are improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device, equipment, low-voltage power supply system and readable storage medium for determining health. Background Art

[0002] The low-voltage power supply system in electric vehicles can supply power to low-voltage electrical appliances such as lights and wipers on the one hand, and to control components such as vehicle controllers and motor control systems on the other hand. Therefore, the health of the low-voltage power supply system plays a very important role in the driving of electric vehicles. However, there is currently no effective solution to detect and determine the health of the vehicle's low-voltage power supply system. Summary of the invention

[0003] In view of the above problems, the present application provides a health determination method, device, equipment, vehicle low-voltage power supply system and readable storage medium for determining the health status of the low-voltage power supply system in the vehicle.

[0004] In a first aspect, the present application provides a method for determining health, including: obtaining the current value of a health influencing parameter of a power supply channel corresponding to a low-voltage power supply system; and determining the current health of the power supply channel using the current value of the health influencing parameter of the power supply channel.

[0005] In the technical solution of the embodiment of the present application, by obtaining the current values ​​of the health influencing parameters of the power supply channels corresponding to the low-voltage power supply systems in the vehicle, the obtained current values ​​of the health influencing parameters of the power supply channels are used to implement quantitative analysis and determine the health of the corresponding power supply channels in the low-voltage power supply system, so as to provide accurate health parameters for drivers and maintenance personnel, thereby facilitating relevant personnel to conduct vehicle inspections and / or vehicle maintenance according to the current health status, so as to reduce the actual fault and failure rate of the low-voltage power supply system and improve the safety and reliability of vehicle driving.

[0006] In some embodiments, it also includes: obtaining historical values ​​of parameters affecting the health of the power supply channel, the design life of the hardware in the power supply channel, and the working time of the hardware; using the historical values ​​of the parameters affecting the health of the power supply channel to determine a first health loss value of the power supply channel, and using the design life and working time of the hardware in the power supply channel to determine a second health loss value of the power supply channel; after determining the current health of the power supply channel using the current values ​​of the parameters affecting the health of the power supply channel, it also includes: using the current health of the power supply channel, the first health loss value, and the second health loss value to determine the corrected health of the power supply channel.

[0007] By taking both historical adverse environmental factors and natural aging factors into consideration in determining the health of the power supply channel, the health of the power supply channel over its entire life cycle can be determined, and the accuracy of determining the health of the power supply channel can be improved.

[0008] In some embodiments, the health influencing parameters of the power supply channel include the supply voltage, output current and temperature of the switches in the power supply channel; the current health of the power supply channel is determined using the current values ​​of the health influencing parameters of the power supply channel, including: determining the health of the power supply channel based on the current supply voltage according to the current supply voltage of the power supply channel, determining the health of the power supply channel based on the current output current according to the current output current of the power supply channel, and determining the health of the power supply channel based on the current temperature according to the current temperature of the switches in the power supply channel; determining the current health of the power supply channel according to the health of the power supply channel based on the current supply voltage, the health of the power supply channel based on the current output current, the health of the power supply channel based on the current temperature and the corresponding weight coefficients.

[0009] The power supply voltage, output current and temperature of switches in the power supply channel are all taken into consideration in determining the health of the power supply channel, thereby improving the accuracy of determining the current health of the power supply channel.

[0010] In some embodiments, determining the health of the power supply channel based on the current power supply voltage according to the current power supply voltage of the power supply channel includes: using Calculate the health of the power supply channel based on the current power supply voltage H voltage ; Wherein, U is the current supply voltage of the power supply channel, U1 is the first voltage threshold, U2 is the second voltage threshold, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m1 is the first coefficient, m2 is the first constant term, m3 is the second constant term, and m4 is the second coefficient.

[0011] The above methods can improve health H voltage The accuracy of the calculation is improved, thereby facilitating the improvement of the accuracy of the current health of the low-voltage power supply system and the calculation of the corrected health.

[0012] In some embodiments, determining the health of the power supply channel based on the current output current according to the current output current of the power supply channel includes: using Calculate the health H of the power supply channel based on the current output current current ; Wherein, I is the current output current of the power supply channel, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, and m6 is the third coefficient.

[0013] Improve your health by the above methodsvoltage The accuracy of the calculation is improved, thereby facilitating the improvement of the accuracy of the current health of the low-voltage power supply system and the calculation of the corrected health.

[0014] In some embodiments, determining the health of the power supply channel based on the current temperature of the switch in the power supply channel includes: using Calculate the health H of the power supply channel based on the current temperature temperature ; Wherein, T is the current temperature of the switch in the power supply channel, T1 is the first temperature threshold, T2 is the second temperature threshold, m7 is the fourth constant term, and m8 is the fourth coefficient.

[0015] The above methods can improve health H temperature The accuracy of the calculation is improved, thereby facilitating the improvement of the accuracy of the current health of the low-voltage power supply system and the calculation of the corrected health.

[0016] In some embodiments, the health influencing parameters of the power supply channel include the power supply voltage, the output current and the temperature of the switch in the power supply channel; the first health loss value of the power supply channel is determined by using the historical values ​​of the health influencing parameters of the power supply channel, including: determining the health loss value caused by the historical cumulative power supply voltage abnormality of the power supply channel according to the historical power supply voltage of the power supply channel, determining the health loss value caused by the historical cumulative output current abnormality of the power supply channel according to the historical output current of the power supply channel, and determining the health loss value caused by the historical cumulative temperature abnormality of the power supply channel according to the historical temperature of the switch in the power supply channel; determining the first health loss value according to the health loss value caused by the historical cumulative supply voltage abnormality of the power supply channel, the health loss value caused by the historical cumulative output current abnormality of the power supply channel and the health loss value caused by the historical cumulative temperature abnormality of the power supply channel.

[0017] The above method can improve the accuracy of calculating the first health loss value ΔH1, thereby improving the accuracy of calculating the corrected health of the power supply channel.

[0018] In some embodiments, determining the health loss value caused by the abnormal historical accumulated power supply voltage of the power supply channel according to the historical power supply voltage of the power supply channel includes: using Calculate the health loss value ΔH caused by the historical cumulative power supply voltage anomaly of the power supply channel v ; Wherein, a is the weight coefficient corresponding to the power supply voltage of the power supply channel, Nvi is the health loss ratio under abnormal power supply voltage, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m3 is the second constant term, m4 is the second coefficient, U′ is the historical power supply voltage of the power supply channel at the corresponding working time, Te is the working time of the vehicle, C v It is the health loss value caused by the abnormal power supply voltage allowed for the low-voltage components in the power supply channel within the design life span.

[0019] The above method can improve the health loss value ΔH caused by the abnormal power supply voltage of the power supply channel history. v The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the first health loss value, and further improving the accuracy of the calculation of the corrected health of the power supply channel in the low-voltage power supply system.

[0020] In some embodiments, determining the health loss value caused by the abnormal historical cumulative output current of the power supply channel according to the historical output current of the power supply channel includes: using Calculate the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c ;in, N ci is the health loss ratio under abnormal output current, I′ is the historical output current of the power supply channel at the corresponding working time, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, m6 is the third coefficient, b is the weight coefficient corresponding to the output current of the power supply channel, Te is the working time of the vehicle, C C It is the health loss value caused by the abnormal output current allowed for the low-voltage components in the power supply channel within the design life span.

[0021] Through the above, the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel can be improved c The calculation accuracy of the first health loss value can be improved, thereby improving the calculation accuracy of the corrected health of the power supply channel in the low-voltage power supply system.

[0022] In some embodiments, determining the health loss value caused by the historical accumulated temperature anomaly of the power supply channel according to the historical temperature of the switch in the power supply channel includes: using Calculate the health loss value ΔH caused by the historical cumulative temperature anomaly of the power supply channel t ; Wherein, c is the weight coefficient corresponding to the temperature of the switch in the power supply channel, N ti is the health loss ratio under abnormal temperature, T′ is the historical temperature of the switch in the power supply channel at the corresponding working time, m7 is the fourth constant term, m8 is the fourth coefficient, T1 is the first temperature threshold, T2 is the second temperature threshold, Te is the working time of the vehicle, Ct It is a health loss value caused by temperature anomaly allowed for the switch in the power supply channel within the design life span.

[0023] Through the above, the health loss value ΔH caused by the historical accumulated temperature anomaly of the power supply channel can be increased t The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the first health loss value, and further improving the accuracy of the calculation of the corrected health of the power supply channel in the low-voltage power supply system.

[0024] In some embodiments, the hardware in the power supply channel includes a switch in the power supply channel; using the design life and working time of the hardware in the power supply channel to determine the second health loss value of the power supply channel includes: using ΔH age =(t 总 / Tage)*k, calculate the second health loss value ΔH of the power supply channel age ; where t 总 is the working time of the switch in the power supply channel, Tage is the theoretical operating time determined according to the design life of the switch in the power supply channel, and k is the extreme value of the health loss of the switch in the power supply channel after the design life is used up.

[0025] Through the above, the second health loss value ΔH can be increased age The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the corrected health of the power supply channel.

[0026] In some embodiments, the method further includes: outputting the current health status and / or the corrected health status of the power supply channel.

[0027] The above method enables relevant personnel to check the health status of the corresponding power supply channel in the low-voltage power supply system in a timely manner, so that relevant personnel can conduct vehicle inspection and maintenance in time before the corresponding power supply channel is damaged, so as to reduce the occurrence rate of real faults or failures of the power supply channel and the low-voltage power supply system, thereby improving the safety and reliability of vehicle driving.

[0028] In the second aspect, the present application provides a health determination device, including: a first acquisition module, used to obtain the current value of the health influencing parameter of the power supply channel corresponding to the low-voltage power supply system; a first determination module, used to use the current value of the health influencing parameter of the power supply channel to determine the current health of the power supply channel.

[0029] In some embodiments, it also includes: a second acquisition module, which is used to obtain historical values ​​of parameters affecting the health of the power supply channel, the design life of the hardware in the power supply channel, and the working time of the hardware; a second determination module, which is used to determine a first health loss value of the power supply channel using the historical values ​​of the parameters affecting the health of the power supply channel, and determine a second health loss value of the power supply channel using the design life and working time of the hardware in the power supply channel; a third determination module, which is used to determine the corrected health of the power supply channel using the current health of the power supply channel, the first health loss value, and the second health loss value after determining the current health of the power supply channel using the current values ​​of the parameters affecting the health of the power supply channel.

[0030] In a third aspect, the present application provides a health determination device, comprising: a memory for storing a computer program; and a processor for implementing the steps of the health determination method as described in any one of the above when executing the computer program.

[0031] In a fourth aspect, the present application provides a low-voltage power supply system, characterized in that it includes: a sampling module for obtaining the current value of a health influencing parameter of a power supply channel corresponding to the low-voltage power supply system; and a health detection module for determining the current health of the power supply channel using the current value of the health influencing parameter of the power supply channel.

[0032] In a fifth aspect, the present application provides a readable storage medium, characterized in that a computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the health determination method as described in any one of the above items are implemented.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 A flowchart of a method for determining health status in some embodiments of the present application;

[0036] Figure 2 A schematic diagram of the structure of a low-voltage power supply system in some embodiments of the present application;

[0037] Figure 3 A graph showing the relationship between the current supply voltage and the corresponding health level of the power supply channel in some embodiments of the present application;

[0038] Figure 4 A graph showing the relationship between the current output current and the corresponding health level of the power supply channel in some embodiments of the present application;

[0039] Figure 5 A graph showing the relationship between the current temperature of a switch in a power supply channel and the corresponding health level in some embodiments of the present application;

[0040] Figure 6 A schematic diagram of the structure of a device for determining health status in some embodiments of the present application;

[0041] Figure 7 This is a schematic diagram of the structure of a health determination device in some embodiments of the present application. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0047] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] The low-voltage power supply system (also called low-voltage intelligent power supply system or low-voltage power distribution system) in electric vehicles can supply power to low-voltage electrical appliances such as lights and wipers, and can also supply power to control components such as vehicle controllers and motor control systems. Therefore, the health of the low-voltage power supply system plays a very important role in the driving of electric vehicles. However, there is currently no effective solution to detect and determine the health of the low-voltage power supply system in electric vehicles.

[0049] To this end, the applicant proposed a health determination method to obtain the current value of the health influencing parameter of the corresponding power supply channel in the low-voltage power supply system, and determine the current health of the power supply channel based on the obtained current value of the health influencing parameter of the power supply channel, so as to realize quantitative analysis and determine the health of the corresponding power supply channel in the vehicle's low-voltage power supply system, thereby providing accurate health parameters for drivers and maintenance personnel, so as to predict the potential faults of the low-voltage power supply system and the time period when the faults may occur, and then remind the driver and / or maintenance personnel to conduct vehicle inspection and maintenance in time before the low-voltage power supply system is damaged, thereby reducing the occurrence rate of real faults or failures of the low-voltage power supply system and improving the safety and reliability of vehicle driving.

[0050] It should be noted that the health status determination provided in the present application can be applicable to low-voltage power supply systems in all electric vehicles, and the electric vehicles can specifically be electric cars, electric buses, etc.

[0051] See also Figure 1 and Figure 2 ,in, Figure 1 This is a flowchart of a method for determining health status in some embodiments of the present application. Figure 2 This is a schematic diagram of the structure of a low-voltage power supply system in some embodiments of the present application. The health determination method in the embodiments of the present application may include the following steps:

[0052] S11: Obtain current values ​​of health influencing parameters of a power supply channel corresponding to the low-voltage power supply system.

[0053] It should be noted that the executing entity of the embodiments of the present application may be a health determination device, equipment, etc., or a low-voltage power supply system in a vehicle, and the low-voltage power supply system in the vehicle may specifically be a controller.

[0054] The low-voltage power supply system in the vehicle corresponds to multiple power supply channels, each of which contains a switch, which can be specifically an EFUSE (intelligent semiconductor switch). The low-voltage power supply system is mainly closed and opened by the switch based on the actual operating conditions of the vehicle. Figure 2 As shown, the vehicle low-voltage power supply system is connected to the low-voltage power supply, low-voltage load 1, low-voltage load 2, ... low-voltage load N through a low-voltage wiring harness, wherein the connection between the low-voltage power supply system and the low-voltage power supply, low-voltage load 1, low-voltage load 2, ... low-voltage load N respectively forms corresponding power supply channels, and the power supply channel formed by the low-voltage power supply system and the low-voltage power supply includes a switch EFUSE_IN, the power supply channel formed by the low-voltage power supply system and the low-voltage load 1 includes a switch EFUSE_OUT 1, and the power supply channel formed by the low-voltage power supply system and the low-voltage load 2 includes a switch EFUSE_OUT 2. ... It should be noted that the low-voltage power supply, low-voltage load 1, low-voltage load 2, ... low-voltage load N are low-voltage devices in the corresponding power supply channels.

[0055] When determining the health, first, the current value of the health-affecting parameter of the power supply channel corresponding to the low-voltage power supply system can be obtained. Among them, the power supply channel mentioned here can be each power supply channel corresponding to the low-voltage power supply system, or it can be a target power supply channel corresponding to the low-voltage power supply system. The target power supply channel is specifically a power supply channel selected from each power supply channel corresponding to the low-voltage power supply system and needs to be tested for health. The current value of the health-affecting parameter of the power supply channel is the current value of the health-affecting parameter of the power supply channel. The health-affecting parameter of the power supply channel is a parameter that affects the health of the power supply channel, and can specifically be at least one of the power supply voltage of the power supply channel, the output current of the power supply channel, and the temperature of the switch in the power supply channel.

[0056] Specifically, the current value of the health affecting parameter of the corresponding power supply channel can be directly collected and obtained; the current value of the health affecting parameter of each power supply channel can also be collected by a sampling module, and the current value of the health affecting parameter of each power supply channel can be distinguished by numbering the power supply channels, etc. After collecting the current value of the health affecting parameter of each power supply channel, these data are stored (for example, they can be stored in a data storage module), and the current value of the health affecting parameter of the corresponding power supply channel is obtained from the stored data; or each power supply channel can correspond to a sampling module, each sampling module respectively collects the current value of the health affecting parameter of the corresponding power supply channel, and the collected data is stored (for example, it can be stored in a data storage module, and each power supply channel can correspond to a data storage module), and the current value of the health affecting parameter of the corresponding power supply channel is obtained from the stored data.

[0057] Moreover, the current value of the health impact of the power supply channel corresponding to the low-voltage power supply system can be obtained in real time, so as to determine the health of the corresponding power supply channel in real time, so as to facilitate relevant personnel to obtain the health status of the corresponding power supply channel in real time. Alternatively, the current value of the health impact parameter of the power supply channel corresponding to the low-voltage power supply system can be obtained periodically, wherein the timing time interval can be set according to actual needs. Alternatively, the current value of the health impact parameter of the power supply channel corresponding to the low-voltage power supply system can be obtained after receiving the power supply channel health determination instruction sent by the user, so as to determine the health of the power supply channel based on the obtained parameters, thereby meeting user needs and improving user experience.

[0058] S12: Determine the current health of the power supply channel by using the current value of the parameter affecting the health of the power supply channel.

[0059] On the basis of step S11, the current health of the corresponding power supply channel can be determined by using the current value of the health influence parameter of the corresponding power supply channel. For example, the corresponding health can be calculated according to the current value of each health influence parameter of the power supply channel, and then, the current health of the power supply channel is determined by weighted summation according to the health corresponding to the current value of each health influence parameter and the corresponding weight coefficient. Alternatively, the corresponding relationship between the current value of the health influence parameter of the power supply channel and the current health of the power supply channel can be obtained in advance, wherein the corresponding relationship can specifically be a health calculation model (the health calculation model can be obtained by neural network training or by fitting, etc.), and after obtaining the current value of the health influence parameter of the power supply channel, the current health of the power supply channel can be determined according to the health influence parameter of the power supply channel and the corresponding relationship.

[0060] The current health of the power supply channel may range from 0 to 100, where 100 represents complete health and 0 represents complete failure. That is, the greater the health of the power supply channel, the better the health of the power supply channel.

[0061] Through the above, quantitative analysis can be achieved to determine the health status of the corresponding power supply channels in the vehicle's low-voltage power supply system, thereby facilitating the prediction of potential failures of the vehicle's low-voltage power supply system and the time period when the failures may occur, so as to remind relevant personnel to conduct vehicle inspections and repairs in a timely manner before the low-voltage power supply system is damaged, thereby reducing the incidence of real failures or failures in the low-voltage power supply system and improving the stability and reliability of the low-voltage power supply system.

[0062] The above-mentioned technical scheme disclosed in the embodiment of the present application obtains the current values ​​of the health influencing parameters of the power supply channels corresponding to the low-voltage power supply systems in the vehicle, and uses the obtained current values ​​of the health influencing parameters of the power supply channels to realize quantitative analysis and determine the health of the corresponding power supply channels in the low-voltage power supply system, so as to provide accurate health parameters for drivers and maintenance personnel, thereby facilitating relevant personnel to conduct vehicle inspections and / or vehicle maintenance according to the current health status, so as to reduce the actual fault and failure rate of the low-voltage power supply system and improve the safety and reliability of vehicle driving.

[0063] According to some embodiments of the present application, the method may further include:

[0064] Obtain the historical values ​​of parameters affecting the health of the power supply channel, the design life of the hardware in the power supply channel, and the working hours of the hardware;

[0065] Determine a first health loss value of the power supply channel by using the historical value of the health influencing parameter of the power supply channel, and determine a second health loss value of the power supply channel by using the design life and working time of the hardware in the power supply channel;

[0066] After determining the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel, the following method may also be included:

[0067] The corrected health of the power supply channel is determined using the current health of the power supply channel, the first health loss value, and the second health loss value.

[0068] Considering that the health status of the power supply channel in the low-voltage power supply system is not only affected by the current value of the corresponding health influencing parameter, but also by the historical adverse environment and natural aging, specifically, the historical adverse environment will cause loss to the power supply channel, thereby reducing the health of the power supply channel, and as the working time of the hardware in the power supply channel increases, the health of the power supply channel will also decrease accordingly. Therefore, it is also possible to calculate the health loss of the power supply channel caused by the historical adverse working environment (i.e., the first health loss value ΔH1) and the health loss caused by the historical cumulative natural aging of the power supply channel (i.e., the second health loss value ΔH2). Then, the health of the power supply channel during the entire life cycle can be determined based on the current health of the power supply channel, the health loss of the power supply channel caused by the historical adverse environment, and the health loss caused by the historical cumulative natural aging, so as to improve the accuracy of the determination of the health of the power supply channel.

[0069] Among them, for the health loss of the power supply channel caused by the historical adverse working environment (i.e., the first health loss value ΔH1), it can be determined by obtaining the historical values ​​of the health impact parameters of the power supply channel and using the historical values ​​of the health impact parameters of the power supply channel, wherein the historical values ​​of the health impact parameters of the power supply channel are the historical values ​​of the health impact parameters of the power supply channel. Specifically, the historical values ​​of the health impact parameters of the power supply channel before the current time can be obtained, and the first health loss value ΔH1 of the power supply channel can be determined using the obtained historical values ​​of the health impact parameters. For example, the corresponding health loss value can be calculated according to each historical value of the health impact parameter of the power supply channel, and then the first health loss value ΔH1 of the power supply channel can be determined according to the health loss values ​​corresponding to the various historical values ​​of the health impact parameters.

[0070] The health loss caused by the historical cumulative natural aging of the power supply channel (i.e., the second health loss value ΔH2) can be determined by obtaining the design life of the hardware in the power supply channel and the working hours of the corresponding hardware in the power supply channel, based on the design life and working hours of the hardware in the power supply channel. Among them, the working hours of the hardware in the power supply channel is the usage time of the hardware in the power supply channel from the first use to the current time, which can be specifically equal to the total driving time of the vehicle. The design life of the hardware in the power supply channel can be obtained from the specification of the switch in the power supply channel (or can also be obtained based on experiments).

[0071] After calculating the first health loss value ΔH1 and the second health loss value ΔH2 of the power supply channel and determining the current health H of the power supply channel by using the current value of the health influencing parameter of the power supply channel p Afterwards, we can use H=H p -ΔH1-ΔH2 or H=H p-(ΔH1+ΔH2) to obtain the corrected health H of the power supply channel to improve the accuracy of determining the health of the power supply channel. Among them, ΔH1+ΔH2 is the total loss value of the historical health of the power supply channel. In addition, the value range of the corrected health of the power supply channel is also 0-100, 100 is completely healthy, and 0 is completely failed.

[0072] According to some embodiments of the present application, the health influencing parameters of the power supply channel may include the power supply voltage, output current and temperature of the switch in the power supply channel;

[0073] Determining the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel may include:

[0074] Determine the health of the power supply channel based on the current power supply voltage according to the current power supply voltage of the power supply channel, determine the health of the power supply channel based on the current output current according to the current output current of the power supply channel, and determine the health of the power supply channel based on the current temperature according to the current temperature of the switch in the power supply channel;

[0075] The current health of the power supply channel is determined according to the health of the power supply channel based on the current power supply voltage, the health of the power supply channel based on the current output current, the health of the power supply channel based on the current temperature and corresponding weight coefficients.

[0076] When determining the current health of the power supply channel using the current value of the health influencing parameter of the power supply channel, the power supply voltage, output current and temperature of the switch in the power supply channel can be taken into account. That is, the health influencing parameter of the power supply channel can specifically include the power supply voltage, output current and temperature of the switch in the power supply channel, so as to take into account various parameters that affect the health of the power supply channel as much as possible, thereby improving the accuracy of determining the current health of the power supply channel and the corrected health of the power supply channel.

[0077] On the basis of the above, when obtaining the current value of the health-affecting parameter of the power supply channel, the current supply voltage, current supply current and current temperature of the switch in the power supply channel can be obtained. Then, the health H of the power supply channel based on the current supply voltage can be determined according to the current supply voltage of the power supply channel. voltage (which can be regarded as the real-time health of the power supply channel based on the power supply voltage), and the health of the power supply channel based on the current output current is determined according to the current output current of the power supply channel H current (which can be regarded as the real-time health of the power supply channel based on the output current), and the health of the power supply channel based on the current temperature is determined according to the current temperature of the switch in the power supply channel H temperature (It can be regarded as the real-time health of the power supply channel based on temperature). Then, the health of the power supply channel based on the current power supply voltage H voltage, the weight coefficient of the power supply voltage on the health a, the health of the power supply channel based on the current output current H current , the weight coefficient b of the output current on the health, the health of the power supply channel based on the current temperature H temperature , the weight coefficient c of temperature on health, using H p =a*H voltage +b*H current +c*H temperature Determine the current health of the power supply channel ΔH p , in order to improve the accuracy of determining the current health of the power supply channel and the corrected health. voltage , H current and H temperature The value range of is 0-100, 100 is completely healthy, and 0 is completely ineffective. a+b+c=1, and the values ​​of a, b, and c can be set according to experience. For example, the initial values ​​can be a=0.3, b=0.3, and c=0.4. Subsequently, based on big data, intelligent algorithms can be used to optimize and calibrate the three weight coefficients of a, b, and c, or the specific values ​​of the three weight coefficients of a, b, and c can be adjusted according to the area and scene where the vehicle is traveling.

[0078] Based on the above, the corrected health of the power supply channel is H = a*H voltage +b*H current +c*H temperature -ΔH1-ΔH2 or H=a*H voltage +b*H current +c*H temperature -(ΔH1+ΔH2.

[0079] According to some embodiments of the present application, determining the health of the power supply channel based on the current power supply voltage of the power supply channel may include:

[0080] use

[0081] Calculate the health of the power supply channel based on the current power supply voltage H voltage ;

[0082] Among them, U is the current power supply voltage of the power supply channel, U1 is the first voltage threshold, U2 is the second voltage threshold, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m1 is the first coefficient, m2 is the first constant term, m3 is the second constant term, and m4 is the second coefficient.

[0083] In the embodiment of the present application, the health level H of the power supply channel based on the current power supply voltage is determined according to the current power supply voltage of the power supply channel. voltageWhen the power supply voltage is divided into five intervals according to the working performance of the low-voltage device in the power supply channel changes with the power supply voltage, the four voltage thresholds of the first voltage threshold U1, the second voltage threshold U2, the third voltage threshold U3 and the fourth voltage threshold U4 can be determined. Specifically, the working parameters of the low-voltage device can be obtained from the specification of the low-voltage device, and the working voltage can be obtained from the working parameters, and the above four voltage thresholds are determined according to the working voltage. In addition, the above four voltage thresholds can be set according to the voltage level of the vehicle's low-voltage power supply system (for example, a voltage level of 12V, a voltage level of 24V, etc.), the low-voltage power supply system and the working voltage of the low-voltage device, and the above four voltage thresholds can also be adjusted according to the actual vehicle state and operating parameters. For example, the first voltage threshold U1 can be the lower limit of the working voltage of the low-voltage device. When the power supply voltage of the low-voltage device is lower than the first voltage threshold U1, the low-voltage power supply load cannot work; when the power supply voltage of the low-voltage device is between the first voltage threshold U1 and the second voltage threshold U2, as the power supply voltage increases, the working performance of the low-voltage device will increase accordingly; when the power supply voltage of the low-voltage device is between the second voltage threshold U2 and the third voltage threshold U3, the working performance of the low-voltage device is relatively stable; when the power supply voltage of the low-voltage device is between the third voltage threshold U3 and the fourth voltage threshold U4, as the power supply voltage increases, the working performance of the low-voltage device will gradually decrease; when the power supply voltage of the low-voltage device is greater than the fourth voltage threshold U4, the low-voltage device cannot work due to overvoltage.

[0084] Based on the above, it can be determined that when the current power supply voltage of the power supply channel is lower than the first voltage threshold U1, the corresponding health level H voltage When the current supply voltage of the power supply channel is between the second voltage threshold U2 and the third voltage threshold U3, the corresponding health level H voltage is 100; when the current supply voltage of the power supply channel is greater than the fourth voltage threshold U4, the corresponding health level H voltage When the current supply voltage of the power supply channel is between the first voltage threshold U1 and the second voltage threshold U2, the horizontal axis is the current supply voltage and the vertical axis is the health level H voltage , the health degree H is obtained by linear fitting based on (U1, 0) and (U2, 100) voltage The relationship between the current supply voltage of the power supply channel is H voltage =m1*U-m2, where m1 is the first coefficient, m2 is the first constant term, and U is the current supply voltage of the power supply channel; when the current supply voltage of the power supply channel is between the third voltage threshold U3 and the fourth voltage threshold U4, the horizontal axis is the current supply voltage and the vertical axis is the health level H voltage , the health degree H is obtained by linear fitting based on (U3, 100) and (U4, 0) voltageThe relationship between the current supply voltage of the power supply channel is H voltage =m3-m4*U, where m3 is the second constant term and m4 is the second coefficient.

[0085]

[0086] Calculate the health of the power supply channel based on the current power supply voltage H voltage , U is the current supply voltage of the power supply channel, for details, please refer to Figure 3 , which is a relationship diagram between the current power supply voltage and the corresponding health of the power supply channel in some embodiments of the present application, wherein the abscissa is the current power supply voltage U of the power supply channel, and the ordinate is the health of the power supply channel based on the current power supply voltage H voltage Taking the vehicle's low-voltage power supply system as an example, the voltage level is 12V, and according to the specification of the low-voltage device, U1 = 6V, U2 = 9V, U3 = 16V, U4 = 21V can be used.

[0087]

[0088] Calculate the health of the power supply channel based on the current power supply voltage H voltage .

[0089] The above methods can improve health H voltage The accuracy of the calculation is improved, thereby facilitating the improvement of the accuracy of determining the current health of the low-voltage power supply system and the corrected health.

[0090] According to some embodiments of the present application, determining the health of the power supply channel based on the current output current of the power supply channel may include:

[0091] use

[0092] Calculate the health of the power supply channel based on the current output current H current ;

[0093] Wherein, I is the current output current of the power supply channel, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, and m6 is the third coefficient.

[0094] In the embodiment of the present application, the health level H of the power supply channel based on the current output current is determined according to the current output current of the power supply channel. currentWhen the output current is divided into three intervals according to the working performance of the low-voltage device in the power supply channel changing with the output current, the first current threshold I1 and the second current threshold I2 can be determined. Specifically, the working parameters of the low-voltage device can be obtained from the specification sheet of the low-voltage device, and the working current can be obtained from the working parameters, and the above two current thresholds can be determined according to the working current. In addition, the above two current thresholds can be determined according to the peak current of the low-voltage power supply system and the low-voltage device in the vehicle, and the above two current thresholds can also be calibrated according to the differences or changes in the actual low-voltage power supply system and the low-voltage device. For example, the first current threshold I1 can be equal to I 峰值电流 The second current threshold I2 may be equal to n times (n is greater than 1, for example, 1.5) I 峰值电流 , I 峰值电流 It is the peak current of the low voltage device in the power supply channel.

[0095] Specifically, when the current output current of the power supply channel is less than the first current threshold I1, the working performance of the low-voltage components in the power supply channel is relatively stable. At this time, the health of the power supply channel based on the current output current H current can be equal to 100; when the current output current of the power supply channel is greater than the second current threshold I2, the low-voltage components in the power supply channel will not work due to overcurrent. At this time, the health of the power supply channel based on the current output current H current can be equal to 0; when the current output current of the power supply channel is between the first current threshold I1 and the second current threshold I2, the horizontal axis can be the current output current of the power supply channel, and the vertical axis can be the health degree H of the power supply channel based on the current output current. current According to (I1, 100) and (I2, 0), the current output current I of the power supply and the corresponding health level H are obtained by linear fitting. current The relationship between H current =m5-m6*I, where m5 is the third constant term and m6 is the third coefficient, which can be used

[0096]

[0097] Calculate the health H of the power supply channel based on the current output current current For details, please refer to Figure 4 , which is a relationship diagram between the current output current and the corresponding health of the power supply channel of some embodiments of the present application, wherein the abscissa is the current output current I of the power supply channel, and the ordinate is the health of the power supply channel based on the current power supply voltage H current . Let I1=I 峰值电流 , I2=1.5*I 峰值电流 For example, the above formula can be transformed into

[0098]

[0099] The above methods can improve health H current The accuracy of the calculation is improved, thereby facilitating the improvement of the accuracy of determining the current health of the low-voltage power supply system and the corrected health.

[0100] According to some embodiments of the present application, determining the health of the power supply channel based on the current temperature of the switch in the power supply channel may include:

[0101] use

[0102] Calculate the health of the power supply channel based on the current temperature H temperature ;

[0103] Wherein, T is the current temperature of the switch in the power supply channel, T1 is the first temperature threshold, T2 is the second temperature threshold, m7 is the fourth constant term, and m8 is the fourth coefficient.

[0104] In the embodiment of the present application, the health degree H of the power supply channel based on the current temperature is determined according to the current temperature of the switch in the power supply channel. temperature When the working performance of the switch in the power supply channel changes with the temperature of the switch, the temperature of the switch can be divided into three intervals, that is, the first temperature threshold T1 and the second temperature threshold T2 can be determined. Specifically, the operating temperature of the switch can be obtained from the specification sheet of the switch, and the above two temperature thresholds can be determined according to the operating temperature. Specifically, the above two temperature thresholds can be set according to the low-voltage power supply system of the vehicle and the operating temperature of the switch, and the above two temperature thresholds can also be calibrated according to the actual vehicle state and operating parameters. For example, the first temperature threshold T1 can be 120°C and the second temperature threshold T2 can be 150°C.

[0105] Specifically, when the current temperature T of the switch in the power supply channel is less than the first temperature threshold T1, the working performance of the switch in the power supply channel is relatively stable. At this time, the health of the power supply channel based on the current temperature H temperature can be equal to 100; when the current temperature of the switch in the power supply channel is greater than the second temperature threshold T2, the switch in the power supply channel will not work due to excessive temperature. At this time, the health of the power supply channel based on the current temperature H temperature can be equal to 0; when the current temperature of the switch in the power supply channel is between the first temperature threshold T1 and the second temperature threshold T2, the current temperature T of the switch can be used as the horizontal coordinate, and the health degree H of the power supply channel based on the current temperature can be calculated. temperature As the ordinate, H is obtained by linear fitting based on (T1, 100) and (T2, 0). temperature=m7-m8*T, where m7 is the fourth constant term and m8 is the fourth coefficient.

[0106]

[0107] Calculate the health of the power supply channel based on the current temperature H temperature For details, please refer to Figure 5 , which is a relationship diagram between the current temperature of the switch in the power supply channel and the corresponding health level in some embodiments of the present application, wherein the abscissa is the current temperature T of the switch in the power supply channel, and the ordinate is the health level H of the power supply channel based on the current temperature temperature When T1=120℃、T2=150℃, the above formula can be transformed into

[0108]

[0109] The above methods can improve health H temperature The accuracy of the calculation is improved, thereby facilitating the improvement of the accuracy of the current health of the low-voltage power supply system and the calculation of the corrected health.

[0110] According to some embodiments of the present application, the health influencing parameters of the power supply channel may include the power supply voltage, output current and temperature of the switch in the power supply channel;

[0111] Determining a first health loss value of the power supply channel by using a health impact parameter history value of the power supply channel may include:

[0112] Determine the health loss value caused by the historical cumulative power supply voltage anomaly of the power supply channel according to the historical power supply voltage of the power supply channel, determine the health loss value caused by the historical cumulative output current anomaly of the power supply channel according to the historical output current of the power supply channel, and determine the health loss value caused by the historical cumulative temperature anomaly of the power supply channel according to the historical temperature of the switch in the power supply channel;

[0113] A first health loss value is determined according to the health loss values ​​caused by the power supply voltage anomaly in the history of the power supply channel, the health loss values ​​caused by the output current anomaly in the history of the power supply channel, and the health loss values ​​caused by the temperature anomaly in the history of the power supply channel.

[0114] In the embodiment of the present application, considering that the power supply voltage, output current and temperature of the switch in the power supply channel will affect the health of the power supply channel, therefore, in order to improve the accuracy of determining the health of the power supply channel, the health influencing parameters of the power supply channel may specifically include the power supply voltage of the power supply channel, the output current of the power supply channel and the temperature of the switch in the power supply channel, thereby facilitating improving the accuracy of determining the current health of the power supply channel.

[0115] On the basis of the above, the historical values ​​of the health-affecting parameters of the power supply channel may specifically include the historical power supply voltage of the power supply channel, the historical output current of the power supply channel, and the historical temperature of the switch in the power supply channel. When determining the first health loss value of the power supply channel using the historical values ​​of the health-affecting parameters of the power supply channel, the health loss value ΔH caused by the abnormal historical cumulative power supply voltage of the power supply channel can be determined based on the historical power supply voltage of the power supply channel. v , according to the historical output current of the power supply channel, determine the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c , according to the historical temperature of the switch in the power supply channel, determine the health loss value ΔH caused by the historical accumulated temperature anomaly of the power supply channel t After that, the health loss value ΔH caused by abnormal power supply voltage can be accumulated according to the power supply channel history v , the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c And the health loss value ΔH caused by the historical accumulated temperature anomaly of the power supply channel t , calculate the first health loss value ΔH1. Among them, when ΔH v , ΔH c and ΔH t When the calculation of includes the weight coefficient of the corresponding health impact parameter, ΔH1=ΔH v +ΔH c +ΔH t ΔH1 is calculated. At this time, the corrected health of the power supply channel is H = H p -ΔH v -ΔH c -ΔH t -ΔH2 or H=H p -(ΔH v +ΔH c +ΔH t +ΔH2); when ΔH v , ΔH c and ΔH t When the weight coefficient of the corresponding health impact parameter is not included in the calculation, ΔH1=a*ΔH v +b*ΔH c +c*ΔH tΔH1 is calculated, where a is the weight coefficient of the power supply voltage to the health, b is the weight coefficient of the output current to the health, c is the weight coefficient of the temperature to the health, a+b+c=1, and the values ​​of a, b, and c can be set according to experience. For example, the initial values ​​can be a=0.3, b=0.4, and c=0.4. Subsequently, based on big data, an intelligent algorithm can be used to optimize and calibrate the three weight coefficients a, b, and c, or the specific values ​​of the three weight coefficients a, b, and c can be adjusted according to the area and scene where the vehicle is traveling.

[0116] The above method can improve the accuracy of calculating the first health loss value ΔH1, thereby improving the accuracy of calculating the corrected health of the power supply channel.

[0117] According to some embodiments of the present application, determining the health loss value caused by abnormal historical accumulated power supply voltage of the power supply channel according to the historical power supply voltage of the power supply channel may include:

[0118] use Calculate the health loss value ΔH caused by the historical cumulative power supply voltage anomaly of the power supply channel v ;

[0119] Among them, a is the weight coefficient corresponding to the power supply voltage of the power supply channel, N vi is the health loss ratio under abnormal power supply voltage,

[0120]

[0121] U3 is the third voltage threshold, U4 is the fourth voltage threshold, m3 is the second constant term, m4 is the second coefficient, U′ is the historical power supply voltage of the power supply channel at the corresponding working time, Te is the working time of the vehicle, C v It is the health loss value caused by abnormal power supply voltage allowed for low-voltage devices in the power supply channel within the design life cycle.

[0122] In the embodiment of the present application, it can be specifically used Calculate the health loss value ΔH caused by the historical cumulative power supply voltage anomaly of the power supply channel v .in,

[0123]

[0124] N viis the health loss ratio under abnormal power supply voltage, specifically, the health loss ratio under abnormal power supply voltage corresponding to the i-th historical operation of the vehicle, U3 and U4 are the third voltage threshold and the fourth voltage threshold respectively, m3 is the second constant term, m4 is the second coefficient, and U3, U4, m3 and m4 can refer to the description of some of the above embodiments, which will not be repeated here, U′ is the historical power supply voltage of the power supply channel at the corresponding working time, and N vi From the calculation formula, it can be seen that the embodiment of the present application mainly considers the health loss caused by overvoltage in order to improve N vi Calculation accuracy, so as to improve the health loss value ΔH caused by the abnormal power supply voltage of the power supply channel v Calculation accuracy. In addition, in the above calculation formula, Te is the working time of the vehicle (specifically, the total working time of the vehicle before the current work, or Te is the working time of the low-voltage power supply system). That is N vi Based on the accumulation of time, that is, calculating the N corresponding to each historical work separately vi And these N vi Accumulation, C v is the health loss value of the abnormal power supply voltage allowed for the low-voltage device in the power supply channel within the design life, calculated based on the normal operation for t1 hours under the continuous working voltage of U4, then C v = t1*3600s, for example, if the working voltage is 21V and the device can work normally for 60 hours, C v =60*3600s=21600s. Among them, the values ​​of U4 and t1 can be obtained from the specification of the low-voltage device, or measured by experiment, or the theoretical values ​​of U4 and t1 can be obtained from the specification, and the experimental value of t1 corresponding to U4 can be obtained by experiment, and then a smaller value can be selected from the theoretical value of t1 and the experimental value of t1, and the smaller value can be used to determine C v a is the weight coefficient corresponding to the power supply voltage of the power supply channel (specifically, the weight coefficient of the power supply voltage of the power supply channel to the health). According to the above embodiment, the initial value of a can be 0.3, and a can be subsequently optimized and calibrated based on big data and an intelligent algorithm, or the specific value of a can be adjusted according to the area and scene where the vehicle is traveling.

[0125] The above method can improve the health loss value ΔH caused by the abnormal power supply voltage of the power supply channel history. v The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the first health loss value, and further improving the accuracy of the calculation of the corrected health of the power supply channel in the low-voltage power supply system.

[0126] According to some embodiments of the present application, determining the health loss value caused by abnormal historical cumulative output current of the power supply channel according to the historical output current of the power supply channel may include:

[0127] use Calculate the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c ;in,

[0128]

[0129] N ci is the health loss ratio under abnormal output current, I′ is the historical output current of the power supply channel at the corresponding working time, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, m6 is the third coefficient, b is the weight coefficient corresponding to the output current of the power supply channel, Te is the working time of the vehicle, C C It is the health loss value caused by abnormal output current of the low-voltage devices in the power supply channel within the design life period.

[0130] In the embodiment of the present application, it can be specifically used Calculate the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c .in,

[0131]

[0132] N ci is the health loss ratio under abnormal output current, specifically, the health loss ratio under abnormal output current corresponding to the i-th historical operation of the vehicle, I′ is the historical output current of the power supply channel at the corresponding working time (that is, the i-th historical operation), I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, m6 is the third coefficient, and the determination of I1, I2, m5 and m6 can refer to the description in some of the above embodiments, which will not be repeated here, Te is the working time of the vehicle (specifically, the total working time of the whole vehicle before the current operation, or the working time of the low-voltage power supply system), That is N ci Based on the accumulation of time, that is, calculating the N corresponding to each historical work separately ci And these N ci Accumulation, C C C is the health loss value caused by the abnormal output current allowed by the low-voltage device in the power supply channel within the design life of the device. It is calculated based on the normal operation of t2 hours under the continuous I2 working current. C = t2*3600s, for example, 12 = 1.5*I 峰值电流 , in a continuous period of 1.5*I 峰值电流If the working current can work normally for 1 hour, then C C =3600s. The values ​​of I2 and t2 can be obtained from the specification of the low-voltage device, or measured by experiment, or the theoretical values ​​of I2 and t2 can be obtained from the specification, and the experimental value of t2 corresponding to I2 can be obtained by experiment. Then, a smaller value can be selected from the theoretical value of t2 and the experimental value of t2, and the smaller value can be used to determine C C b is the weight coefficient corresponding to the output current of the power supply channel (specifically, the weight coefficient of the output current of the power supply channel to the health). According to the above embodiment, the initial value of b can be 0.3, and b can be subsequently optimized and calibrated based on big data and an intelligent algorithm, or the specific value of b can be adjusted according to the area and scene where the vehicle is traveling.

[0133] Through the above, the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel can be improved c The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the first health loss value, and further improving the accuracy of the calculation of the corrected health of the power supply channel in the low-voltage power supply system.

[0134] According to some embodiments of the present application, determining the health loss value caused by the historical accumulated temperature anomaly of the power supply channel according to the historical temperature of the switch in the power supply channel may include:

[0135] use Calculate the health loss value ΔH caused by the historical cumulative temperature anomaly of the power supply channel t ;

[0136] Where c is the weight coefficient corresponding to the temperature of the switch in the power supply channel,

[0137]

[0138] N ti is the health loss ratio under abnormal temperature, T′ is the historical temperature of the switch in the power supply channel at the corresponding working time, m7 is the fourth constant term, m8 is the fourth coefficient, T1 is the first temperature threshold, T2 is the second temperature threshold, Te is the working time of the vehicle, C t It is the health loss value caused by abnormal temperature of the switch in the power supply channel during its design life.

[0139] In the embodiment of the present application, it can be specifically used Calculate the health loss value ΔH caused by the historical cumulative temperature anomaly of the power supply channel t .in,

[0140]

[0141] N ti is the health loss ratio under abnormal temperature, specifically, the health loss ratio under abnormal output current corresponding to the i-th historical operation of the vehicle, T′ is the historical output current of the power supply channel at the corresponding working time (that is, the i-th historical operation), T1 is the first temperature threshold, T2 is the second temperature threshold, m7 is the fourth constant term, m8 is the fourth coefficient, and the determination of T1, T2, m7 and m8 can refer to the description in some of the above embodiments, which will not be repeated here, Te is the working time of the vehicle (specifically, the total working time of the whole vehicle before the current work, or the working time of the low-voltage power supply system), That is, Nti is accumulated based on time, that is, N corresponding to each historical work is calculated separately ti And these N ti Accumulation, C t is the health loss value caused by temperature anomaly allowed in the switch of the power supply channel within the design life, and it is calculated by being able to work normally for t3 hours under a continuous working environment of T2. Then C t =t3*3600s, for example, if it can work normally for 1 hour under the working environment of 150℃, then C t =3600s. The values ​​of T2 and t3 can be obtained from the specifications of the switch in the power supply channel, or can be measured by experiment, or the theoretical values ​​of T2 and t3 can be obtained from the corresponding specifications, and the experimental value of t3 corresponding to T2 can be obtained by experiment. Then, a smaller value can be selected from the theoretical value of t3 and the experimental value of t3, and the smaller value can be used to determine C t c is the weight coefficient corresponding to the temperature of the switch in the power supply channel (specifically, the weight coefficient of the temperature of the switch in the power supply channel to the health). According to the above embodiment, the initial value of c can be 0.4, and c can be optimized and calibrated based on big data and an intelligent algorithm, or the specific value of c can be adjusted according to the area and scene where the vehicle is traveling.

[0142] Through the above, the health loss value ΔH caused by the historical accumulated temperature anomaly of the power supply channel can be increased t The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the first health loss value, and further improving the accuracy of the calculation of the corrected health of the power supply channel in the low-voltage power supply system.

[0143] According to some embodiments of the present application, the hardware in the power supply channel may include a switch in the power supply channel;

[0144] Determining the second health loss value of the power supply channel by using the design life and working time of the hardware in the power supply channel may include:

[0145] Using ΔH age =(t总 / Tage)*k, calculate the second health loss value ΔH of the power supply channel age ;

[0146] Among them, t 总 is the working time of the switch in the power supply channel, Tage is the theoretical operating time determined according to the design life of the switch in the power supply channel, and k is the extreme value of the health loss of the switch in the power supply channel after the design life is used up.

[0147] In the embodiment of the present application, the hardware in the power supply channel includes a switch in the power supply channel (i.e., EFUSE), and considering that the function of the power supply channel is mainly implemented based on the switch in the power supply channel, the design life and working time of the switch in the power supply channel can be used to determine the second health loss value ΔH2 of the power supply channel. Specifically, ΔH age =(t 总 / Tage)*k, calculate the second health loss value ΔH of the power supply channel age (also known as ΔH2). Where, t 总 is the working time of the switch in the power supply channel, Tage is the theoretical operating time determined according to the design life of the switch in the power supply channel (the design life can be obtained from the specification of the switch in the power supply channel). For example, if the design life of the switch in the power supply channel is 10 years and the average vehicle travels 2 hours a day, then the theoretical operating time of the switch in the power supply channel is Tage = 10 years * 365 days / year * 2 hours / day * 3600 seconds / hour = 26280000s. At this time, t 总 The unit is also seconds. k is the extreme value of the health loss of the switch in the power supply channel after the design life is used up. When the health loss value of the switch in the power supply channel exceeds k, the switch is scrapped, that is, k can be regarded as the maximum health loss of the switch. The specific value of k can be obtained according to the switch specification and can be calibrated according to the actual vehicle design parameters. For example, k can be equal to 40.

[0148] By increasing the second health loss value ΔH age The accuracy of the calculation can be improved, thereby improving the accuracy of the calculation of the corrected health of the power supply channel.

[0149] According to some embodiments of the present application, the method may further include:

[0150] The current and / or corrected health of the output power channels.

[0151] In an embodiment of the present application, after determining the current health of the power supply channel and determining the corrected health of the power supply channel, the current health and / or corrected health of the corresponding power supply channel can also be output, specifically, it can be output to an on-board display screen in the vehicle and / or can be output to a mobile terminal (such as a mobile phone) corresponding to the vehicle, so that relevant personnel can promptly check the health status of the corresponding power supply channel in the low-voltage power supply system, thereby facilitating relevant personnel to conduct vehicle inspections and repairs before the corresponding power supply channel is damaged, so as to reduce the incidence of real failures or failures of the power supply channel and the low-voltage power supply system, and improve the safety and reliability of vehicle driving.

[0152] This application also provides a health determination device, see Figure 6 , which is a structural diagram of a health determination device in some embodiments of the present application, the health determination device 60 may include a first acquisition module 61 and a first determination module 62. The first acquisition module 61 is used to obtain the current value of the health impact parameter of the power supply channel corresponding to the low-voltage power supply system; the first determination module 62 is used to determine the current health of the power supply channel using the current value of the health impact parameter of the power supply channel.

[0153] According to some embodiments of the present application, the health determination device 60 may further include a second acquisition module 63, a second determination module 64 and a third determination module 65. The second acquisition module 63 is used to obtain the historical values ​​of the health impact parameters of the power supply channel, the design life of the hardware in the power supply channel and the working time of the hardware; the second determination module 64 is used to determine the first health loss value of the power supply channel using the historical values ​​of the health impact parameters of the power supply channel, and determine the second health loss value of the power supply channel using the design life and working time of the hardware in the power supply channel; the third determination module 65 is used to determine the corrected health of the power supply channel using the current values ​​of the health impact parameters of the power supply channel, the first health loss value and the second health loss value.

[0154] According to some embodiments of the present application, parameters affecting the health of the power supply channel may include the power supply voltage, output current and temperature of switches in the power supply channel; the first determination module 62 uses the current values ​​of the parameters affecting the health of the power supply channel to determine the current health of the power supply channel, specifically for determining the health of the power supply channel based on the current supply voltage according to the current supply voltage of the power supply channel, determining the health of the power supply channel based on the current output current according to the current output current of the power supply channel, and determining the health of the power supply channel based on the current temperature according to the current temperature of the switches in the power supply channel; determine the current health of the power supply channel according to the health of the power supply channel based on the current supply voltage, the health of the power supply channel based on the current output current, the health of the power supply channel based on the current temperature and the corresponding weight coefficients.

[0155] According to some embodiments of the present application, the first determination module 62 determines the health of the power supply channel based on the current power supply voltage according to the current power supply voltage of the power supply channel, specifically for using

[0156]

[0157] Calculate the health of the power supply channel based on the current power supply voltage H voltage ; Wherein, U is the current supply voltage of the power supply channel, U1 is the first voltage threshold, U2 is the second voltage threshold, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m1 is the first coefficient, m2 is the first constant term, m3 is the second constant term, and m4 is the second coefficient.

[0158] According to some embodiments of the present application, the first determination module 62 determines the health of the power supply channel based on the current output current according to the current output current of the power supply channel, specifically for using

[0159]

[0160] Calculate the health of the power supply channel based on the current output current H current ; Wherein, I is the current output current of the power supply channel, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, and m6 is the third coefficient.

[0161] According to some embodiments of the present application, the first determination module 62 determines the health of the power supply channel based on the current temperature of the switch in the power supply channel, specifically for using

[0162]

[0163] Calculate the health of the power supply channel based on the current temperature H temperature ; Wherein, T is the current temperature of the switch in the power supply channel, T1 is the first temperature threshold, T2 is the second temperature threshold, m7 is the fourth constant term, and m8 is the fourth coefficient.

[0164] According to some embodiments of the present application, the health influencing parameters of the power supply channel may include the power supply voltage, output current and temperature of the switches in the power supply channel; the second determination module 64 uses the historical values ​​of the health influencing parameters of the power supply channel to determine the first health loss value of the power supply channel, specifically used to determine the health loss value caused by the historical cumulative power supply voltage abnormality of the power supply channel according to the historical power supply voltage of the power supply channel, determine the health loss value caused by the historical cumulative output current abnormality of the power supply channel according to the historical output current of the power supply channel, and determine the health loss value caused by the historical cumulative temperature abnormality of the power supply channel according to the historical temperature of the switches in the power supply channel; determine the first health loss value according to the health loss value caused by the historical cumulative supply voltage abnormality of the power supply channel, the health loss value caused by the historical cumulative output current abnormality of the power supply channel and the health loss value caused by the historical cumulative temperature abnormality of the power supply channel.

[0165] According to some embodiments of the present application, the second determination module 64 determines the health loss value caused by the abnormal historical cumulative power supply voltage of the power supply channel according to the historical power supply voltage of the power supply channel, which is specifically used to use Calculate the health loss value ΔH caused by the historical cumulative power supply voltage anomaly of the power supply channel v ; Where a is the weight coefficient corresponding to the power supply voltage of the power supply channel, N vi is the health loss ratio under abnormal power supply voltage,

[0166]

[0167] U3 is the third voltage threshold, U4 is the fourth voltage threshold, m3 is the second constant term, m4 is the second coefficient, U′ is the historical power supply voltage of the power supply channel at the corresponding working time, Te is the working time of the vehicle, C v It is the health loss value caused by abnormal power supply voltage allowed for low-voltage devices in the power supply channel within the design life cycle.

[0168] According to some embodiments of the present application, the second determination module 64 determines the health loss value caused by the abnormal historical cumulative output current of the power supply channel according to the historical output current of the power supply channel, which is specifically used to use Calculate the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c ;in,

[0169]

[0170] N ciis the health loss ratio under abnormal output current, I′ is the historical output current of the power supply channel at the corresponding working time, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, m6 is the third coefficient, b is the weight coefficient corresponding to the output current of the power supply channel, Te is the working time of the vehicle, C C It is the health loss value caused by abnormal output current of the low-voltage devices in the power supply channel within the design life period.

[0171] According to some embodiments of the present application, the second determination module 64 determines the health loss value caused by the historical accumulated temperature anomaly of the power supply channel according to the historical temperature of the switch in the power supply channel, specifically for using Calculate the health loss value ΔH caused by the historical cumulative temperature anomaly of the power supply channel t ; Where c is the weight coefficient corresponding to the temperature of the switch in the power supply channel,

[0172]

[0173] N ti is the health loss ratio under abnormal temperature, T′ is the historical temperature of the switch in the power supply channel at the corresponding working time, m7 is the fourth constant term, m8 is the fourth coefficient, T1 is the first temperature threshold, T2 is the second temperature threshold, Te is the working time of the vehicle, C t It is the health loss value caused by abnormal temperature of the switch in the power supply channel during its design life.

[0174] According to some embodiments of the present application, the hardware in the power supply channel may include a switch in the power supply channel; the second determination module 64 determines the second health loss value of the power supply channel by using the design life and working time of the hardware in the power supply channel, specifically for using ΔH age =(t 总 / Tage)*k, calculate the second health loss value ΔH of the power supply channel age ; where t 总 is the working time of the switch in the power supply channel, Tage is the theoretical operating time determined according to the design life of the switch in the power supply channel, and k is the extreme value of the health loss of the switch in the power supply channel after the design life is used up.

[0175] According to some embodiments of the present application, the health determination device 60 may further include an output module for outputting the current health and / or corrected health of the power supply channel.

[0176] This application also provides a health determination device, see Figure 7, which is a structural diagram of a health determination device in some embodiments of the present application, and the health determination device 70 may include a memory 71 and a processor 72. Among them, the memory 71 is used to store a computer program; the processor 72 can implement the following steps when it is used to execute the computer program: obtain the current value of the health impact parameter of the power supply channel corresponding to the low-voltage power supply system; use the current value of the health impact parameter of the power supply channel to determine the current health of the power supply channel.

[0177] The present application also provides a low voltage power supply system, such as Figure 2 As shown, the low-voltage power supply system may include a sampling module and a health detection module. The sampling module is used to obtain the current value of the health impact parameter of the power supply channel corresponding to the low-voltage power supply system; the health detection module is used to determine the current health of the power supply channel using the current value of the health impact parameter of the power supply channel.

[0178] According to some embodiments of the present application, the sampling module is also used to obtain historical values ​​of parameters affecting the health of the power supply channel, the design life of the hardware in the power supply channel, and the working hours of the hardware; the health detection module is also used to determine a first health loss value of the power supply channel using the historical values ​​of parameters affecting the health of the power supply channel, and determine a second health loss value of the power supply channel using the design life and working hours of the hardware in the power supply channel; and determine the corrected health of the power supply channel using the current health of the power supply channel, the first health loss value, and the second health loss value.

[0179] According to some embodiments of the present application, the low-voltage power supply system may further include a data storage module for storing current values ​​of parameters affecting the health of a power supply channel corresponding to the low-voltage power supply system obtained by the sampling module, historical values ​​of parameters affecting the health of the power supply channel, the design life of hardware in the power supply channel, and the working hours of the hardware.

[0180] According to some embodiments of the present application, the sampling module may specifically include a voltage sampling module, a current sampling module and a temperature sampling module, wherein the voltage sampling module is used to obtain the current supply voltage of the power supply channel; the current sampling module is used to obtain the current output current of the power supply channel; and the temperature sampling module is used to obtain the current temperature of the switch in the power supply channel.

[0181] On the basis of the above, the health detection module uses the current value of the health influencing parameter of the power supply channel to determine the current health of the power supply channel, specifically, it is used to determine the health of the power supply channel based on the current supply voltage according to the current supply voltage of the power supply channel, determine the health of the power supply channel based on the current output current according to the current output current of the power supply channel, and determine the health of the power supply channel based on the current temperature according to the current temperature of the switch in the power supply channel; determine the current health of the power supply channel according to the health of the power supply channel based on the current supply voltage, the health of the power supply channel based on the current output current, the health of the power supply channel based on the current temperature and the corresponding weight coefficients.

[0182] According to some embodiments of the present application, the health detection module determines the health of the power supply channel based on the current power supply voltage according to the current power supply voltage of the power supply channel, specifically for using

[0183]

[0184] Calculate the health of the power supply channel based on the current power supply voltage H voltage ; Wherein, U is the current supply voltage of the power supply channel, U1 is the first voltage threshold, U2 is the second voltage threshold, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m1 is the first coefficient, m2 is the first constant term, m3 is the second constant term, and m4 is the second coefficient.

[0185] According to some embodiments of the present application, the health detection module determines the health of the power supply channel based on the current output current according to the current output current of the power supply channel, specifically for using

[0186]

[0187] Calculate the health of the power supply channel based on the current output current H current ; Wherein, I is the current output current of the power supply channel, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, and m6 is the third coefficient.

[0188] According to some embodiments of the present application, the health detection module determines the health of the power supply channel based on the current temperature of the switch in the power supply channel, specifically for using

[0189]

[0190] Calculate the health of the power supply channel based on the current temperature H temperature ; Wherein, T is the current temperature of the switch in the power supply channel, T1 is the first temperature threshold, T2 is the second temperature threshold, m7 is the fourth constant term, and m8 is the fourth coefficient.

[0191] According to some embodiments of the present application, the sampling module may specifically include a voltage sampling module, a current sampling module and a temperature sampling module, wherein the voltage sampling module is used to obtain the historical power supply voltage of the power supply channel; the current sampling module is used to obtain the historical output current of the power supply channel; and the temperature sampling module is used to obtain the historical accumulated temperature of the switch in the power supply channel.

[0192] On the basis of the above, the health detection module uses the historical values ​​of the health influencing parameters of the power supply channel to determine the first health loss value of the power supply channel, which is specifically used to determine the health loss value caused by the historical cumulative power supply voltage abnormality of the power supply channel according to the historical power supply voltage of the power supply channel, determine the health loss value caused by the historical cumulative output current abnormality of the power supply channel according to the historical output current of the power supply channel, and determine the health loss value caused by the historical cumulative temperature abnormality of the power supply channel according to the historical temperature of the switches in the power supply channel; determine the first health loss value according to the health loss value caused by the historical cumulative supply voltage abnormality of the power supply channel, the health loss value caused by the historical cumulative output current abnormality of the power supply channel, and the health loss value caused by the historical cumulative temperature abnormality of the power supply channel.

[0193] According to some embodiments of the present application, the health detection module determines the health loss value caused by the abnormal historical cumulative power supply voltage of the power supply channel according to the historical power supply voltage of the power supply channel, which is specifically used to use Calculate the health loss value ΔH caused by the historical cumulative power supply voltage anomaly of the power supply channel v ; Where a is the weight coefficient corresponding to the power supply voltage of the power supply channel, N vi is the health loss ratio under abnormal power supply voltage,

[0194]

[0195] U3 is the third voltage threshold, U4 is the fourth voltage threshold, m3 is the second constant term, m4 is the second coefficient, U′ is the historical power supply voltage of the power supply channel at the corresponding working time, Te is the working time of the vehicle, C v It is the health loss value caused by abnormal power supply voltage allowed for low-voltage devices in the power supply channel within the design life cycle.

[0196] According to some embodiments of the present application, the health detection module determines the health loss value caused by the abnormal historical cumulative output current of the power supply channel according to the historical output current of the power supply channel, which is specifically used to use Calculate the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c ;in,

[0197]

[0198] N ci is the health loss ratio under abnormal output current, I′ is the historical output current of the power supply channel at the corresponding working time, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, m6 is the third coefficient, b is the weight coefficient corresponding to the output current of the power supply channel, Te is the working time of the vehicle, C C It is the health loss value caused by abnormal output current of the low-voltage devices in the power supply channel within the design life period.

[0199] According to some embodiments of the present application, the health detection module determines the health loss value caused by the historical accumulated temperature anomaly of the power supply channel according to the historical temperature of the switch in the power supply channel, which is specifically used to use Calculate the health loss value ΔH caused by the historical cumulative temperature anomaly of the power supply channel t ; Where c is the weight coefficient corresponding to the temperature of the switch in the power supply channel,

[0200]

[0201] N ti is the health loss ratio under abnormal temperature, T′ is the historical temperature of the switch in the power supply channel at the corresponding working time, m7 is the fourth constant term, m8 is the fourth coefficient, T1 is the first temperature threshold, T2 is the second temperature threshold, Te is the working time of the vehicle, C t It is the health loss value caused by abnormal temperature of the switch in the power supply channel during its design life.

[0202] According to some embodiments of the present application, the hardware in the power supply channel may include a switch in the power supply channel; the health detection module determines the second health loss value of the power supply channel by using the design life and working time of the hardware in the power supply channel, specifically for using ΔH age =(t 总 / Tage)*k, calculate the second health loss value ΔH of the power supply channel age ; where t 总 is the working time of the switch in the power supply channel, Tage is the theoretical operating time determined according to the design life of the switch in the power supply channel, and k is the extreme value of the health loss of the switch in the power supply channel after the design life is used up.

[0203] The present application also provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps can be implemented: obtaining the current value of the health influencing parameter of the power supply channel corresponding to the low-voltage power supply system; and determining the current health of the power supply channel using the current value of the health influencing parameter of the power supply channel.

[0204] It should be noted that the description of the relevant parts of a health determination device, equipment, low-voltage power supply system and readable storage medium provided in the present application can be found in the detailed description of the corresponding parts of a health determination method provided in an embodiment of the present application, and will not be repeated here.

[0205] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for determining health, characterized in that: include: Obtain the current value of the health influencing parameter of the power supply channel corresponding to the low-voltage power supply system; The current health of the power supply channel is determined by using the current value of the health influencing parameter of the power supply channel.

2. The method for determining health status according to claim 1, characterized in that: Also includes: Obtaining historical values ​​of parameters affecting the health of the power supply channel, the design life of hardware in the power supply channel, and the working time of the hardware; Determine a first health loss value of the power supply channel by using a historical value of a health influencing parameter of the power supply channel, and determine a second health loss value of the power supply channel by using a design life and working time of hardware in the power supply channel; After determining the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel, the method further includes: The corrected health of the power supply channel is determined by using the current health of the power supply channel, the first health loss value, and the second health loss value.

3. The method for determining health status according to claim 2, characterized in that: The health influencing parameters of the power supply channel include the power supply voltage, output current and temperature of the switch in the power supply channel; Determining the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel includes: Determine the health of the power supply channel based on the current power supply voltage of the power supply channel, determine the health of the power supply channel based on the current output current of the power supply channel, and determine the health of the power supply channel based on the current temperature of the switch in the power supply channel; The current health of the power supply channel is determined according to the health of the power supply channel based on the current power supply voltage, the health of the power supply channel based on the current output current, the health of the power supply channel based on the current temperature, and corresponding weight coefficients.

4. The method for determining health status according to claim 3, characterized in that: Determining, according to the current power supply voltage of the power supply channel, the health of the power supply channel based on the current power supply voltage, includes: use Calculate the health of the power supply channel based on the current power supply voltage H voltage ; Among them, U is the current power supply voltage of the power supply channel, U1 is the first voltage threshold, U2 is the second voltage threshold, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m1 is the first coefficient, m2 is the first constant term, m3 is the second constant term, and m4 is the second coefficient.

5. The method for determining health status according to claim 3, characterized in that: Determining the health of the power supply channel based on the current output current of the power supply channel includes: use Calculate the health H of the power supply channel based on the current output current current ; Among them, I is the current output current of the power supply channel, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, and m6 is the third coefficient.

6. The method for determining health status according to claim 3, characterized in that: Determining the health of the power supply channel based on the current temperature of the switch in the power supply channel includes: use Calculate the health H of the power supply channel based on the current temperature temperature ; Wherein, T is the current temperature of the switch in the power supply channel, T1 is the first temperature threshold, T2 is the second temperature threshold, m7 is the fourth constant term, and m8 is the fourth coefficient.

7. The method for determining health status according to claim 2, characterized in that: The health influencing parameters of the power supply channel include the power supply voltage, output current and temperature of the switch in the power supply channel; Determining a first health loss value of the power supply channel by using a health impact parameter history value of the power supply channel includes: Determine the health loss value caused by the abnormal historical cumulative power supply voltage of the power supply channel according to the historical power supply voltage of the power supply channel, determine the health loss value caused by the abnormal historical cumulative output current of the power supply channel according to the historical output current of the power supply channel, and determine the health loss value caused by the abnormal historical cumulative temperature of the power supply channel according to the historical temperature of the switch in the power supply channel; The first health loss value is determined according to the health loss value caused by the power supply voltage anomaly in the history of the power supply channel, the health loss value caused by the output current anomaly in the history of the power supply channel, and the health loss value caused by the temperature anomaly in the history of the power supply channel.

8. The method for determining health status according to claim 7, characterized in that: Determining a health loss value caused by an abnormal historical accumulated power supply voltage of the power supply channel according to the historical power supply voltage of the power supply channel includes: use Calculate the health loss value ΔH caused by the historical cumulative power supply voltage anomaly of the power supply channel v ; Wherein, a is the weight coefficient corresponding to the power supply voltage of the power supply channel, N vi is the health loss ratio under abnormal power supply voltage, U3 is the third voltage threshold, U4 is the fourth voltage threshold, m3 is the second constant term, m4 is the second coefficient, U ′ is the historical power supply voltage of the power supply channel at the corresponding working time, Te is the working time of the vehicle, C v It is the health loss value caused by the abnormal power supply voltage allowed for the low-voltage components in the power supply channel within the design life span.

9. The method for determining health status according to claim 7, characterized in that: Determining a health loss value caused by abnormal historical accumulated output current of the power supply channel according to the historical output current of the power supply channel includes: use Calculate the health loss value ΔH caused by the abnormal historical cumulative output current of the power supply channel c ; in, N ci is the health loss ratio under abnormal output current, I ′ is the historical output current of the power supply channel at the corresponding working time, I1 is the first current threshold, I2 is the second current threshold, m5 is the third constant term, m6 is the third coefficient, b is the weight coefficient corresponding to the output current of the power supply channel, Te is the working time of the vehicle, C C It is the health loss value caused by the abnormal output current allowed for the low-voltage components in the power supply channel within the design life span.

10. The method for determining health status according to claim 7, characterized in that: Determining a health loss value caused by an abnormal historical accumulated temperature of the power supply channel according to a historical temperature of a switch in the power supply channel includes: use Calculate the health loss value ΔH caused by the historical cumulative temperature anomaly of the power supply channel t ; Wherein, c is the weight coefficient corresponding to the temperature of the switch in the power supply channel, N ti is the health loss ratio under abnormal temperature, T ′ is the historical temperature of the switch in the power supply channel at the corresponding working time, m7 is the fourth constant term, m8 is the fourth coefficient, T1 is the first temperature threshold, T2 is the second temperature threshold, Te is the working time of the vehicle, C t It is a health loss value caused by temperature anomaly allowed for the switch in the power supply channel within the design life span.

11. The method for determining health status according to claim 2, characterized in that: The hardware in the power supply channel includes a switch in the power supply channel; Determining a second health loss value of the power supply channel by using the design life and working time of the hardware in the power supply channel includes: Using ΔH age =(t 总 / Tage)*k, calculate the second health loss value ΔH of the power supply channel age ; Among them, t 总 is the working time of the switch in the power supply channel, Tage is the theoretical operating time determined according to the design life of the switch in the power supply channel, and k is the extreme value of the health loss of the switch in the power supply channel after the design life is used up.

12. The method for determining health status according to any one of claims 2 to 11, characterized in that: Also includes: Output the current health status and / or the corrected health status of the power supply channel.

13. A device for determining health, characterized in that: include: A first acquisition module is used to obtain a current value of a health influencing parameter of a power supply channel corresponding to a low-voltage power supply system; The first determination module is used to determine the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel.

14. The health status determination device according to claim 13, characterized in that: Also includes: A second acquisition module is used to obtain historical values ​​of health-affecting parameters of the power supply channel, the design life of hardware in the power supply channel, and the working time of the hardware; A second determination module is used to determine a first health loss value of the power supply channel by using a historical value of a health influencing parameter of the power supply channel, and to determine a second health loss value of the power supply channel by using a design life and working time of hardware in the power supply channel; The third determination module is used to determine the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel, and then determine the corrected health of the power supply channel by using the current health of the power supply channel, the first health loss value and the second health loss value.

15. A health determination device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the steps of the health determination method as described in any one of claims 1 to 12 when executing the computer program.

16. A low voltage power supply system, characterized in that: include: A sampling module, used to obtain current values ​​of health influencing parameters of a power supply channel corresponding to a low-voltage power supply system; The health detection module is used to determine the current health of the power supply channel by using the current value of the health influencing parameter of the power supply channel.

17. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the health determination method according to any one of claims 1 to 12 are implemented.

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