Fault judgment method, device and equipment for vehicle charging system

Abstract

The present invention discloses a fault judgment method, device and equipment for a vehicle power replenishment system, which belongs to the field of battery technology. The power replenishment system includes a battery, and the method includes: obtaining the charging power of the battery in M ​​times of charging and the corresponding charging ampere-hour, where M is an integer greater than 1; if the sum of the charging power of the M times of charging is equal to the first power threshold, determining the first cumulative charging ampere-hour of the battery according to the charging ampere-hour of the M times of charging; based on the first cumulative charging ampere-hour and the first power threshold, obtaining the first health state value of the battery; if the first health state value is less than the first health state threshold, determining that the battery is aged. The present invention solves the technical problem of shortening the vehicle development cycle.

Description

Technical Field

[0001] The present invention belongs to the field of battery technology, and in particular relates to a fault judgment method, device and equipment for a vehicle power replenishment system. Background Art

[0002] The charging system provides power for the vehicle, including storage batteries and power batteries. During the vehicle's driving, the charging system can provide power to drive the vehicle. In addition, the charging system can provide power for the vehicle to enable the vehicle's onboard equipment to work normally.

[0003] The phenomenon of battery aging in the charging system of new energy vehicles is common. Due to the complex distribution and strong interactivity of the electrical system hardware, the introduction of new charging system devices will increase the complexity of vehicle hardware, thereby lengthening the vehicle development cycle. Therefore, shortening the vehicle development cycle is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present invention provide a method, device and equipment for fault judgment of a vehicle power replenishment system, which solve the technical problem of shortening the vehicle development cycle.

[0005] In a first aspect, an embodiment of the present invention provides a fault judgment method for a vehicle power replenishment system, the power replenishment system including a battery, the method including: obtaining the charging capacity of the battery in M ​​charging times and the corresponding charging ampere-hours, where M is an integer greater than 1; if the sum of the charging capacity of the M charging times is equal to a first power threshold, determining a first cumulative charging ampere-hour of the battery according to the charging ampere-hours of the M charging times; based on the first cumulative charging ampere-hour and the first power threshold, obtaining a first health status value of the battery; if the first health status value is less than the first health status threshold, determining that the battery is aged.

[0006] In combination with the first aspect of the present invention, in some implementations, after obtaining the first health status value of the battery, the method further includes: updating the capacity of the battery based on the first health status value.

[0007] In combination with the first aspect of the present invention, in some embodiments, it also includes: when the vehicle is in a charging state, obtaining multi-dimensional state parameters of the battery, the state parameters are used to characterize the current working state of the battery; based on the multi-dimensional state parameters of the battery, judging whether the battery is aged.

[0008] In combination with the first aspect of the present invention, in some embodiments, the status parameters include battery power, battery temperature, a second accumulated charging ampere-hour and a minimum charging current, and judging whether the battery is aged based on the multi-dimensional status parameters of the battery includes: if the duration for which the multi-dimensional status parameters of the battery meet the corresponding preset threshold conditions is greater than a preset time threshold, judging that the battery is aged; wherein the preset threshold conditions refer to that the battery power is within a preset power range, the battery temperature is greater than a preset temperature threshold, the second accumulated charging ampere-hour is less than a preset ampere-hour threshold, and the minimum charging current is less than a preset current threshold.

[0009] In combination with the first aspect of the present invention, in some embodiments, the status parameters include battery power, charging current and battery temperature, and judging whether the battery is aged based on the multi-dimensional status parameters of the battery further includes: if the duration for which the multi-dimensional status parameters of the battery meet the corresponding preset threshold conditions is greater than a preset time threshold, judging that the battery is aged; wherein the preset threshold conditions refer to that the battery power is less than a second power threshold, the charging current is less than a preset current threshold, and the battery temperature is greater than a preset temperature threshold.

[0010] In combination with the first aspect of the present invention, in some embodiments, it also includes: when the vehicle is in a non-high-voltage state, obtaining multi-dimensional state parameters of the battery, the state parameters including battery power and discharge voltage, and the state parameters are used to characterize the current working state of the battery; if the duration for which the multi-dimensional state parameters of the battery meet the corresponding preset threshold conditions is greater than a preset time threshold, determining that the battery is aged; wherein the preset threshold conditions refer to that the battery power is greater than a second power threshold and the discharge voltage is less than a preset voltage threshold.

[0011] In combination with the first aspect of the present invention, in some embodiments, it also includes: when the vehicle is in a charging state, controlling the vehicle to self-learn the battery state; in response to the number of times the vehicle self-learns the battery state exceeds a first number threshold, obtaining the internal resistance of the battery based on the self-learned battery state; based on the internal resistance of the battery, obtaining a second health status value of the battery; if the second health status value is less than a second health status threshold, determining that the battery is aged.

[0012] In combination with the first aspect of the present invention, in some embodiments, the power replenishment system also includes a power battery, and the method also includes: when the vehicle is not in a dormant state, in response to the power battery receiving a power replenishment signal, the power battery replenishes power to the storage battery, and the power replenishment signal is a signal sent when the battery power of the storage battery is lower than a third power threshold; recording the time interval between two consecutive times that the power battery replenishes power to the storage battery; in response to the time interval being less than the power replenishment duration threshold, recording an abnormal power replenishment; when the number of abnormal power replenishments is greater than the second number threshold, determining that the power battery is depleted.

[0013] In a second aspect, an embodiment of the present invention provides a fault judgment device for a vehicle power replenishment system, the power replenishment system including a battery, and the device including: an acquisition unit, used to obtain the charging power of the battery in M ​​charging times and the corresponding charging ampere-hours, M is an integer greater than 1; an ampere-hour determination unit, used to determine a first cumulative charging ampere-hour of the battery according to the charging ampere-hours of the M charging times if the sum of the charging power of the M charging times is equal to a first power threshold; a health determination unit, used to obtain a first health status value of the battery based on the first cumulative charging ampere-hour and the first power threshold; an aging judgment unit, used to determine that the battery is aged if the first health status value is less than the first health status threshold.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods described in the first aspect when executing the computer program.

[0015] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0016] The embodiment of the present invention obtains the charging capacity of the battery in M ​​charging times and the corresponding charging ampere-hour, where M is an integer greater than 1; if the sum of the charging capacity of the M charging times is equal to the first power threshold, the first cumulative charging ampere-hour of the battery is determined according to the charging ampere-hour of the M charging times; based on the first cumulative charging ampere-hour and the first power threshold, the first health status value of the battery is obtained; if the first health status value is less than the first health status threshold, the battery is determined to be aged. The first health status value of the battery is obtained through the charging data of M charging times, so as to realize the judgment of whether the battery is aged at the software level. Thereby, the hardware complexity is reduced and the technical problem of shortening the vehicle development cycle is solved. It can realize the accurate judgment of the aging fault of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Flow chart of a method for determining a fault in a vehicle power replenishment system according to an embodiment of the present invention;

[0019] Figure 2 This is a functional module diagram of a fault judgment device for a vehicle power replenishment system according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The embodiment of the present invention provides a method for determining a fault in a vehicle power supply system, wherein the power supply system includes a storage battery and a power battery. Figure 1 As shown, the method includes the following steps S101 to S104:

[0024] S101: Obtain the charging capacity of the battery after M charging times and the corresponding charging ampere-hours, where M is an integer greater than 1.

[0025] It should be noted that the charging capacity refers to the capacity that the battery theoretically obtains during the charging process, and the charging ampere-hour refers to the capacity that the battery actually obtains during the charging process.

[0026] It is understandable that before obtaining the charging capacity of the battery after M charges and the corresponding charging ampere-hours, it is necessary to ensure that the vehicle is in a charging state and the battery power state is reliable, so that accurate data can be obtained and data credibility can be improved.

[0027] It should be noted that the method of ensuring that the vehicle is in a state of recharging may include: after the vehicle is powered off at high voltage and completes network hibernation, the power domain controller timer T1 is activated and begins to accumulate 12 hours, and after the integer multiple of 12 hours is satisfied, the power domain controller wakes itself up and actively wakes up the battery management system, and the battery management system simultaneously detects that the battery power is less than 75% and the battery power state is credible, at which time the power domain controller will wake up other controllers to complete power-on and recharge. If the entire vehicle is not currently in hibernation, the battery management system detects that the battery power is not higher than 45% and the battery power state is credible, and at the same time actively wakes up the power domain controller through the LIN (Local Interconnect Network, serial communication network) line, and the power domain controller wakes up other controllers to power on and recharge.

[0028] S102: If the sum of the charging quantities of the M charging times is equal to the first quantity threshold, determine a first accumulated charging ampere-hour of the battery according to the charging ampere-hours of the M charging times.

[0029] It can be understood that the method of determining the first accumulated charging ampere-hour of the battery according to the charging ampere-hours of M charging times includes: taking the sum of the charging ampere-hours of the M charging times as the first accumulated charging ampere-hour of the battery.

[0030] It is understandable that if the sum of the charging power of M times of charging is not equal to the first power threshold, then the charging is continued and the charging data is recorded to obtain the charging power of each charging of the battery and the corresponding charging ampere-hours.

[0031] It should be noted that the first power threshold is the accumulated charging power, which has a relatively large value. Specifically, the fully charged charging power is 100%, and the first power threshold can be six times the fully charged charging power, that is, 600%. The reason for setting the first power threshold is to extend the statistical period, reduce the impact of accidental errors on the data, improve the credibility of the data, and accurately judge the aging of the battery.

[0032] S103: Obtaining a first health status value of the battery based on the first accumulated charging ampere-hour and the first power threshold.

[0033] It is understandable that, based on the first accumulated charging ampere-hour and the first power threshold, a method for obtaining the first health state value of the battery may be: taking the quotient of the first accumulated charging ampere-hour and the first power threshold as the first health state value of the battery.

[0034] Specifically, assuming that the capacity of the battery under full charge is 40 ah, the first power threshold may be 6×40 ah=240 ah. If the first accumulated charging ampere-hour is 168 ah, the first health status value is 0.7.

[0035] S104: If the first health state value is less than the first health state threshold, it is determined that the battery is aged.

[0036] It can be understood that if the first health state value is not less than the first health state threshold value, it is determined that the battery is not aged.

[0037] Specifically, if the first health state value is 0.7 and the first health state threshold is 0.8, it is determined that the battery is aged. If the first health state value is 0.9 and the first health state threshold is 0.8, it is determined that the battery is not aged.

[0038] It can be understood that after obtaining the first health state value of the battery, the method further includes: updating the capacity of the battery based on the first health state value.

[0039] It should be noted that updating the capacity of the battery can more accurately determine whether the battery is aged, and provide more accurate data for other operation steps.

[0040] It should be noted that the battery power statistics health status value of the battery is recorded in the cloud by using a linear data structure such as a queue. When the health status value storage space is about to overflow, only one end is allowed to insert and the other end is deleted to maintain a first-in-first-out storage method. If the battery is replaced or disassembled, the aging judgment flag of the vehicle controller will be cleared, and the cloud will automatically clear all accumulated data and start accumulating again in the next working condition.

[0041] It is understandable that the method for determining whether the battery is aged also includes the following steps S201-S202:

[0042] S201: When the vehicle is in a charging state, obtain multi-dimensional state parameters of the battery, where the state parameters are used to characterize the current working state of the battery.

[0043] It is understandable that before obtaining the multi-dimensional state parameters of the battery, it is necessary to ensure that the power state of the battery is credible, so that accurate data can be obtained and the data credibility can be improved.

[0044] It should be noted that the status parameters may include battery power, battery temperature, second accumulated charging ampere-hours, minimum charging current, discharge voltage and charging current.

[0045] S202: Determine whether the battery is aged based on the multi-dimensional state parameters of the battery.

[0046] It is understandable that there are multiple implementations for determining whether a battery is aged based on the multi-dimensional state parameters of the battery:

[0047] Implementation method 1:

[0048] If the duration of the multi-dimensional state parameters of the battery satisfying the corresponding preset threshold conditions is greater than the preset time threshold, the battery is determined to be aged. The preset threshold conditions refer to the battery power being within the preset power range, the battery temperature being greater than the preset temperature threshold, the second accumulated charging ampere-hour being less than the preset ampere-hour threshold, and the minimum charging current being less than the preset current threshold.

[0049] It should be noted that the preset power range may be 50% to 80%, the preset temperature threshold may be zero degrees Celsius, the preset ampere-hour threshold may be 6ah, the preset current threshold may be 0.5A, and the preset duration threshold may be 500ms.

[0050] It should be noted that the battery charge is closely related to the degree of aging, battery temperature, discharge rate and other conditions, and the battery capacity requires long-term self-learning and continuous correction of the battery's own state. As the battery is used continuously, the adjustment of the number of corrections will cause the battery capacity to jump. Therefore, the specific judgment logic needs to be combined with the battery charge, battery temperature, the second cumulative charging ampere-hour and the minimum charging current, and the preset time threshold must be met.

[0051] Implementation method 2:

[0052] If the duration of the multi-dimensional state parameters of the battery meeting the corresponding preset threshold conditions is greater than the preset time threshold, the battery is determined to be aged. The preset threshold conditions refer to the battery power being less than the second power threshold, the charging current being less than the preset current threshold, and the battery temperature being greater than the preset temperature threshold.

[0053] It should be noted that the preset time threshold may be 500 ms, the second power threshold may be 90%, the preset current threshold may be 0.5 A, and the preset temperature threshold may be zero degrees Celsius.

[0054] It should be noted that since the battery itself has a certain limit on the number of charge and discharge cycles, long-term use will be accompanied by a continuous increase in internal resistance due to aging, causing the expected life span to continue to decay over time. In addition, the temperature value itself will affect the internal chemical reaction. Therefore, the specific judgment logic needs to be combined with the battery power, charging current and battery temperature, and the preset time threshold must be met to accurately judge the battery aging.

[0055] It is understandable that the method for determining whether the battery is aged also includes the following steps S301 to S304:

[0056] S301: When the vehicle is in a charging state, control the vehicle to self-learn the battery state.

[0057] It is understandable that before controlling the vehicle to self-learn the battery status, it is necessary to ensure that the battery power status is reliable, so that accurate data can be obtained and the data credibility can be improved.

[0058] It can be understood that the method for controlling the vehicle self-learning battery state includes the following steps S3011-S3012:

[0059] S3011: In response to the vehicle satisfying a preset learning condition, the vehicle is controlled to be in a discharging state within a preset learning time threshold and the vehicle is kept awake, and the discharging data is recorded.

[0060] It should be noted that the learning time threshold can be 30 minutes.

[0061] It can be understood that the vehicle meets the preset learning condition means: the duration of the vehicle being in a dormant state is controlled to be greater than the preset dormant time threshold. The power domain controller is controlled to actively wake up the battery management system to obtain the battery power of the battery. In response to the battery power being greater than the preset wake-up power threshold, it is determined that the vehicle meets the preset learning condition.

[0062] It should be noted that the sleep time threshold may be 4 hours, and the wake-up power threshold may be 95%.

[0063] S3012: In response to the battery power being less than a preset learning power threshold, completing this self-learning according to the discharge data.

[0064] S302: In response to the number of times the vehicle self-learns the battery status exceeding a first number threshold, the internal resistance of the battery is obtained based on the self-learned battery status.

[0065] It should be noted that the first count threshold may be 10. Setting the first count threshold may make the self-learning result more accurate and improve the data reliability.

[0066] S303: Obtaining a second health status value of the battery based on the internal resistance of the battery.

[0067] Specifically, based on the internal resistance of the battery, a method for obtaining the second health status value of the battery may be: taking the difference between the internal resistance of the battery and the initial internal resistance of the battery, and dividing the difference by the initial internal resistance of the battery, as the health ratio; and taking the difference between one and the health ratio as the second health status value.

[0068] S304: If the second health state value is less than the second health state threshold, it is determined that the battery is aged.

[0069] It can be understood that if the second health state value is not less than the second health state threshold value, it is determined that the battery is not aged.

[0070] Specifically, if the second health state value is 0.7 and the second health state threshold is 0.8, it is determined that the battery is aged. If the second health state value is 0.9 and the second health state threshold is 0.8, it is determined that the battery is not aged.

[0071] It should be noted that the aging mechanism of the vehicle-side starting battery caused by the loss of active substances during use mainly occurs in the low-power range, and as the battery eventually develops into a failure trend during normal use, the internal resistance will turn into a substantial increase in the later stage.

[0072] It is understandable that the method for determining whether the battery is aged also includes the following steps S401-S402:

[0073] S401: When the vehicle is in a non-high voltage state, obtain multi-dimensional state parameters of the battery, the state parameters including battery power and discharge voltage, and the state parameters are used to characterize the current working state of the battery.

[0074] It is understandable that before obtaining the multi-dimensional state parameters of the battery, it is necessary to ensure that the power state of the battery is credible, so that accurate data can be obtained and the data credibility can be improved.

[0075] It should be noted that the method for ensuring that the vehicle is in a non-high-voltage state may include: during the use of the vehicle, the current vehicle environment will be adjusted according to the current use mode, and the conversion between the high-voltage scene and the non-high-voltage scene will be completed through the event trigger mechanism. In the high-voltage scene, the power domain controller will remove the shielding of the power-off process if it does not receive the high-voltage request signal, and send a standby command to complete the electrical appliance shutdown process. At the same time, the first preset waiting time begins to accumulate. If the vehicle is currently in a stationary state or directly times out, the power domain controller will control the DCDC (DC to DC power supp ly, DC to DC power supply) to exit the current working mode. At the same time, the second preset waiting time begins to accumulate, by judging the current state of DCDC, the battery current size or direct timeout. The power domain controller sends an HV OFF (high vol tageoff, high voltage shutdown) instruction to the power battery management system. If the current power battery state has been switched to an inactive state, the power domain controller will request the high-voltage components to be actively discharged according to the priority to complete the high-voltage power-off of the entire vehicle. Among them, the first preset waiting time can be 5s, and the second preset waiting time can be 2s.

[0076] S402: If the duration of the multi-dimensional state parameters of the battery satisfying the corresponding preset threshold conditions is greater than the preset time threshold, the battery is determined to be aged, wherein the preset threshold conditions refer to the battery power being greater than the second power threshold and the discharge voltage being less than the preset voltage threshold.

[0077] It should be noted that the preset time threshold may be 500ms, the second power threshold may be 75%, and the preset voltage threshold may be 11.2V.

[0078] It should be noted that, due to the consideration of the current fluctuation caused by the operation of low-voltage load electrical appliances, a filter is added to filter the peaks to prevent the power battery from detecting abnormal voltage jump frames that cause the low-voltage relay to fail to close normally. Therefore, the specific judgment logic includes that in addition to the multi-dimensional state parameters of the battery meeting the corresponding preset threshold conditions, the duration that the multi-dimensional state parameters of the battery meet the corresponding preset threshold conditions is greater than the preset duration threshold.

[0079] It is understandable that the power replenishment system failure includes battery aging and power battery power failure. The method for determining whether the power battery is power-deficient includes the following steps S501 to S504:

[0080] S501: When the vehicle is not in a dormant state, in response to the power battery receiving a power replenishment signal, the power battery replenishes power to the storage battery. The power replenishment signal is a signal sent when the battery power of the storage battery is lower than a third power threshold.

[0081] It is understandable that before the power battery replenishes power to the storage battery in response to the power battery receiving the replenishment signal, it is necessary to ensure that the power state of the storage battery is reliable, so that data can be accurately obtained and data credibility can be improved.

[0082] It should be noted that the third power threshold may be selected as 20% or a similar value.

[0083] S502: Record the time interval between two consecutive times when the power battery replenishes power to the storage battery.

[0084] S503: In response to the time interval being less than the power replenishment duration threshold, an abnormal power replenishment is recorded.

[0085] It should be noted that the charging time threshold may be 12 hours.

[0086] S504: When the number of abnormal power replenishment is greater than the second number threshold, it is determined that the power battery is low on power.

[0087] It should be noted that the second number threshold may be 2. Setting the second number threshold can avoid misjudgment of accidental factors, resulting in erroneous judgment of power battery power shortage, and improve the reliability of judgment.

[0088] It should be noted that after the vehicle is locked and powered off, the controller will delay for a certain period of time and cancel all controller wake-up sources. After the power domain controller determines that the local sleep conditions are met, it sends a Release to the network management module to release network communication, and sends a RequestPowerOff to allow the central controller to sleep. At this time, the application frame message and NM wake-up frame message stop sending, and the entire vehicle is in sleep state.

[0089] It should be noted that during long-term use of the vehicle, the consumption of standby energy causes the dark current to exceed the standard, or the underlying functional interaction causes the vehicle communication to remain awake, which will cause technical problems such as the vehicle's power battery to run low.

[0090] It should be noted that the power replenishment system failure includes battery aging and power battery depletion. Steps S101 to S104, steps S201 to S202, steps S301 to S304 or steps S401 to S402 can all be used to determine whether the battery is aged. In addition, steps S501 to S504 can be used to determine whether the power battery is depleted. It is understandable that in different application scenarios, steps S101 to S104, steps S201 to S202, steps S301 to S304, steps S401 to S402 and steps S501 to S504 can be used to determine the failure of the power replenishment system separately or in combination.

[0091] The embodiment of the present invention sets reasonable judgment logic through the application layer program without increasing the hardware cost. During normal use of the vehicle, the data is synchronously uploaded to the background through the on-board communication terminal. The background staff remotely diagnoses the severity of the fault or actively provides on-site care, which to a certain extent solves the problem of the vehicle being unable to start due to battery or power battery failure.

[0092] The embodiment of the present invention obtains the charging capacity of the battery in M ​​charging times and the corresponding charging ampere-hour, where M is an integer greater than 1; if the sum of the charging capacity of the M charging times is equal to the first power threshold, the first cumulative charging ampere-hour of the battery is determined according to the charging ampere-hour of the M charging times; based on the first cumulative charging ampere-hour and the first power threshold, the first health status value of the battery is obtained; if the first health status value is less than the first health status threshold, the battery is determined to be aged. The first health status value of the battery is obtained through the charging data of M charging times, so as to realize the judgment of whether the battery is aged at the software level. Thereby, the hardware complexity is reduced and the technical problem of shortening the vehicle development cycle is solved. It can realize the accurate judgment of the aging fault of the battery.

[0093] Based on the same inventive concept, Figure 2As shown, an embodiment of the present invention provides a fault judgment device 10 for a vehicle power replenishment system, the power replenishment system includes a battery, and the fault judgment device 10 for the vehicle power replenishment system includes: an acquisition unit 110, used to obtain the charging power of the battery in M ​​charging times and the corresponding charging ampere-hour, where M is an integer greater than 1; an ampere-hour determination unit 120, used to determine a first cumulative charging ampere-hour of the battery according to the charging ampere-hour of the M charging times if the sum of the charging power of the M charging times is equal to a first power threshold; a health determination unit 130, used to obtain a first health status value of the battery based on the first cumulative charging ampere-hour and the first power threshold; an aging judgment unit 140, used to determine that the battery is aged if the first health status value is less than the first health status threshold.

[0094] It is understandable that the fault judgment device 10 of the vehicle power replenishment system further includes: an updating unit 150, which is used to update the capacity of the battery based on the first health status value.

[0095] It can be understood that the fault judgment device 10 of the vehicle charging system also includes: a state parameter acquisition unit 160, which is used to obtain the multi-dimensional state parameters of the battery when the vehicle is in the charging state, and the state parameters are used to characterize the current working state of the battery; a state judgment unit 170, which is used to judge whether the battery is aged based on the multi-dimensional state parameters of the battery.

[0096] It can be understood that the status parameters include battery power, battery temperature, a second accumulated charging ampere-hour and a minimum charging current, and the status judgment unit 170 includes: a first judgment subunit 1710, for judging that the battery is aged if the duration of the multi-dimensional status parameters of the battery satisfying the corresponding preset threshold conditions is greater than a preset time threshold; wherein the preset threshold conditions refer to that the battery power is within a preset power range, the battery temperature is greater than a preset temperature threshold, the second accumulated charging ampere-hour is less than a preset ampere-hour threshold, and the minimum charging current is less than a preset current threshold.

[0097] It can be understood that the status parameters include battery power, charging current and battery temperature, and the status judgment unit 170 also includes: a second judgment subunit 1720, which is used to determine that the battery is aged if the duration of the multi-dimensional status parameters of the battery satisfying the corresponding preset threshold conditions is greater than the preset time threshold; wherein the preset threshold conditions refer to the battery power being less than the second power threshold, the charging current being less than the preset current threshold and the battery temperature being greater than the preset temperature threshold.

[0098] It can be understood that the state parameter acquisition unit 160 is also used to obtain the multi-dimensional state parameters of the battery when the vehicle is in a non-high-voltage state, the state parameters including the battery power and the discharge voltage, and the state parameters are used to characterize the current working state of the battery; the state judgment unit 170 is also used to determine that the battery is aged if the duration of the multi-dimensional state parameters of the battery satisfying the corresponding preset threshold conditions is greater than the preset time threshold; wherein the preset threshold condition refers to the battery power being greater than the second power threshold and the discharge voltage being less than the preset voltage threshold.

[0099] It can be understood that the fault judgment device 10 of the vehicle charging system also includes: a self-learning control unit 180, which is used to control the vehicle to self-learn the battery state when the vehicle is in the charging state; an internal resistance acquisition unit 190, which is used to obtain the internal resistance of the battery based on the self-learned battery state in response to the number of times the vehicle self-learns the battery state exceeds the first number threshold; a health generation unit 200, which is used to obtain a second health state value of the battery based on the internal resistance of the battery; and a state judgment unit 170, which is also used to determine that the battery is aged if the second health state value is less than the second health state threshold.

[0100] It can be understood that the power replenishment system also includes a power battery, and the fault judgment device 10 of the vehicle power replenishment system also includes: a signal acquisition unit 210, which is used to replenish the power battery to the storage battery in response to the power battery receiving the power replenishment signal when the vehicle is not in a dormant state, and the power replenishment signal is a signal sent when the battery power of the storage battery is lower than the third power threshold; a recording unit 220, which is used to record the time interval between two consecutive power replenishments from the power battery to the storage battery; a response unit 230, which is used to record an abnormal power replenishment in response to the time interval being less than the power replenishment time threshold; a power shortage judgment unit 240, which is used to determine that the power battery is power shortage when the number of abnormal power replenishments is greater than the second number threshold.

[0101] It should be understood that more implementation details of the fault judgment device 10 of the vehicle power replenishment system in the embodiment of the present invention refer to the fault judgment method of the vehicle power replenishment system described above, and for the sake of brevity of the specification, they are not repeated here.

[0102] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, such as Figure 3 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps described in any implementation of the method for fault judgment of the vehicle charging system.

[0103] Among them, Figure 3In the embodiment of the present invention, a bus architecture (represented by bus 300) is shown, which may include any number of interconnected buses and bridges, and bus 300 links various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 may be used to store data used by processor 302 when performing operations.

[0104] The embodiment of the present invention obtains the charging capacity of the battery in M ​​charging times and the corresponding charging ampere-hour, where M is an integer greater than 1; if the sum of the charging capacity of the M charging times is equal to the first power threshold, the first cumulative charging ampere-hour of the battery is determined according to the charging ampere-hour of the M charging times; based on the first cumulative charging ampere-hour and the first power threshold, the first health status value of the battery is obtained; if the first health status value is less than the first health status threshold, the battery is determined to be aged. The first health status value of the battery is obtained through the charging data of M charging times, so as to realize the judgment of whether the battery is aged at the software level. Thereby, the hardware complexity is reduced and the technical problem of shortening the vehicle development cycle is solved. It can realize the accurate judgment of the aging fault of the battery.

[0105] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0108] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0109] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for determining a fault in a vehicle power supply system, characterized in that: The power replenishment system includes a battery, and the method includes: Obtaining the charging capacity of the battery after M charging times and the corresponding charging ampere-hours, where M is an integer greater than 1; If the sum of the charging quantities of the M charging times is equal to the first power threshold, determining a first accumulated charging ampere-hour of the battery according to the charging ampere-hours of the M charging times; Obtaining a first health state value of the battery based on the first accumulated charging ampere-hour and the first power threshold, including: dividing the first accumulated charging ampere-hour by the first power threshold as the first health state value of the battery; If the first health state value is less than a first health state threshold, determining that the battery is aged; When the vehicle is in a charging state, obtaining a multi-dimensional state parameter of the battery, the state parameter being used to characterize a current working state of the battery; and judging whether the battery is aged based on the multi-dimensional state parameter of the battery; The status parameters include battery power, battery temperature, a second accumulated charging ampere-hour and a minimum charging current. The determining whether the battery is aged based on the multi-dimensional status parameters of the battery includes: if the duration for which the multi-dimensional status parameters of the battery meet corresponding preset threshold conditions is greater than a preset time threshold, determining that the battery is aged; wherein the preset threshold conditions refer to that the battery power is within a preset power range, the battery temperature is greater than a preset temperature threshold, the second accumulated charging ampere-hour is less than a preset ampere-hour threshold, and the minimum charging current is less than a preset current threshold.

2. The fault judgment method of the vehicle power supply system according to claim 1, characterized in that: After obtaining the first health status value of the battery, the method further includes: Based on the first health status value, the capacity of the battery is updated.

3. The fault judgment method of the vehicle power supply system according to claim 1, characterized in that: The state parameters include battery power, charging current and battery temperature. The method of judging whether the battery is aged based on the multi-dimensional state parameters of the battery further includes: If the duration that the multi-dimensional state parameters of the battery meet the corresponding preset threshold conditions is greater than the preset time threshold, it is determined that the battery is aged; The preset threshold condition refers to that the battery power is less than a second power threshold, the charging current is less than a preset current threshold, and the battery temperature is greater than a preset temperature threshold.

4. The fault judgment method of the vehicle power supply system according to claim 1, characterized in that: Also includes: When the vehicle is in a non-high-voltage state, obtaining multi-dimensional state parameters of the battery, the state parameters including battery power and discharge voltage, and the state parameters are used to characterize the current working state of the battery; If the duration that the multi-dimensional state parameters of the battery meet the corresponding preset threshold conditions is greater than the preset time threshold, it is determined that the battery is aged; The preset threshold condition refers to that the battery power is greater than a second power threshold and the discharge voltage is less than a preset voltage threshold.

5. The fault judgment method of the vehicle power supplement system according to claim 1, characterized in that: Also includes: When the vehicle is in a charging state, controlling the vehicle to self-learn the battery state; In response to the number of times the vehicle self-learns the battery state exceeds a first number threshold, acquiring the internal resistance of the battery based on the self-learned battery state; Obtaining a second health status value of the battery based on the internal resistance of the battery; If the second health state value is less than a second health state threshold, it is determined that the battery is aged.

6. The fault judgment method of the vehicle power supplement system according to claim 1, characterized in that: The power replenishment system further includes a power battery, and the method further includes: When the vehicle is not in a dormant state, in response to the power battery receiving a power replenishment signal, the power battery replenishes power to the storage battery, wherein the power replenishment signal is a signal sent when the battery power of the storage battery is lower than a third power threshold; Recording the time interval between two consecutive times when the power battery supplements the storage battery with electricity; In response to the time interval being less than the power replenishment duration threshold, recording an abnormal power replenishment; When the number of abnormal power replenishments is greater than the second number threshold, it is determined that the power battery is low on power.

7. A fault judgment device for a vehicle power supply system, characterized in that: The power replenishment system includes a battery, and the device includes: an acquisition unit, used for acquiring the charging capacity of the storage battery after M times of charging and the corresponding charging ampere-hour, where M is an integer greater than 1; an ampere-hour determining unit, configured to determine a first accumulated charging ampere-hour of the battery according to the charging ampere-hours of the M charging times if the sum of the charging quantities of the M charging times is equal to a first quantity threshold; a health determination unit, configured to obtain a first health state value of the battery based on the first accumulated charging ampere-hour and the first power threshold, comprising: dividing the first accumulated charging ampere-hour by the first power threshold as the first health state value of the battery; an aging judgment unit, for judging that the battery is aged if the first health state value is less than a first health state threshold; when the vehicle is in a charging state, obtaining a multi-dimensional state parameter of the battery, the state parameter being used to characterize the current working state of the battery; judging whether the battery is aged based on the multi-dimensional state parameter of the battery; the state parameter comprising a battery power, a battery temperature, a second accumulated charging ampere-hour and a minimum charging current, and judging whether the battery is aged based on the multi-dimensional state parameter of the battery comprises: judging that the battery is aged if the duration for which the multi-dimensional state parameter of the battery satisfies the corresponding preset threshold conditions is greater than a preset duration threshold; wherein the preset threshold condition refers to that the battery power is within a preset power range, the battery temperature is greater than a preset temperature threshold, the second accumulated charging ampere-hour is less than a preset ampere-hour threshold, and the minimum charging current is less than a preset current threshold.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 6 when executing the computer program.

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