CN116593919A - Abnormality detection method and system during parking of vehicle - Google Patents

Abnormality detection method and system during parking of vehicle Download PDF

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Publication number
CN116593919A
CN116593919A CN202310612581.3A CN202310612581A CN116593919A CN 116593919 A CN116593919 A CN 116593919A CN 202310612581 A CN202310612581 A CN 202310612581A CN 116593919 A CN116593919 A CN 116593919A
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China
Prior art keywords
vehicle
network
time
power
parking
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Pending
Application number
CN202310612581.3A
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Chinese (zh)
Inventor
唐军华
何文
张鹏
文涛
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Chongqing Changan Automobile Co Ltd
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Chongqing Changan Automobile Co Ltd
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Priority to CN202310612581.3A priority Critical patent/CN116593919A/en
Publication of CN116593919A publication Critical patent/CN116593919A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to the technical field of vehicle detection, and discloses an abnormality detection method and system during vehicle parking, wherein the method comprises the following specific steps: when the vehicle is parked, recording the power-down time and the power-down electric quantity of the vehicle; monitoring the network state of the CAN in the power-down period of the vehicle in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network; when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle; and judging whether the vehicle is abnormal or not. The invention solves the problem that the prior art lacks a method for rapidly detecting the power shortage problem of the vehicle during parking, and has the characteristic of saving manpower.

Description

Abnormality detection method and system during parking of vehicle
Technical Field
The invention relates to the technical field of vehicle detection, in particular to an abnormality detection method and system during vehicle parking.
Background
The most basic requirement of the automobile is that the automobile can be started normally, but if the storage battery of the automobile is deficient, each controller of the automobile cannot work, and the whole automobile cannot be started. Along with the development of automobile intellectualization and iterative updating, automobile cloud coordination is already the basis for realizing automobile intellectualization.
The vehicle network abnormality identification is an important research direction of the vehicle networking data, and the vehicle network abnormality is a main cause of vehicle power shortage.
There are currently generally two ways to monitor CAN network activity during parking.
The method for monitoring the network state of the whole vehicle for externally hanging CAN equipment has the following defects: after the problem occurs to the vehicle, the problem is rechecked, and the sporadic problem monitoring time is long; can equipment is expensive; personnel are required to track one by one; the user experience is poor.
Another is to use a network data transmission from the vehicle to the cloud server via the car 4g module. The embedded point signals of the vehicle end are uploaded to the cloud end, so that the working condition of the vehicle CAN CAN be identified.
A judging method for non-dormancy and abnormal awakening of a vehicle CAN network is provided. Judging whether the vehicle should normally sleep or not through information such as power-down, locking and the like; if the data is uploaded after locking, the CAN network is judged to be abnormal. If the data is not received for a long time, the data is judged to be lost.
There is also a method for identifying abnormal dormancy and abnormal awakening of a vehicle, and if the vehicle is not normally dormant, recording abnormal dormancy data of the vehicle; when the vehicle is dormant, judging that the vehicle is abnormally awakened, and recording abnormal awakening data of the vehicle; the vehicle abnormal dormancy data and the vehicle abnormal awakening data are stored in the DID of the local controller. The relevant information can be read by a diagnostic instrument.
However, the problem of the prior art that a method for quickly detecting the power shortage problem of the vehicle during parking is lacking is how to invent a method for quickly detecting the power shortage problem of the vehicle during parking, which is a technical problem in the technical field that needs to be solved.
Disclosure of Invention
The invention provides an anomaly detection method and system for a vehicle parking period, which are characterized by saving labor, and aims to solve the problem that the prior art lacks a method for rapidly detecting the power shortage problem of the vehicle during the parking period.
In order to achieve the above purpose of the present invention, the following technical scheme is adopted:
an anomaly detection method during parking of a vehicle comprises the following specific steps:
when the vehicle is parked, recording the power-down time and the power-down electric quantity of the vehicle;
monitoring the network state of the CAN in the power-down period of the vehicle in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network;
when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle;
comparing the electric quantity of the vehicle when the power is on with the electric quantity of the vehicle when the power is off, and judging whether the vehicle is deficient in power or not:
if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
if the accumulated activation time of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
if the accumulated activation time of the CAN network during parking is smaller than the set threshold T, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
Preferably, the further checking whether the storage battery is abnormal, specifically:
judging whether the parking time exceeds a set parking time threshold according to the vehicle power-down time and the power-up time;
if the parking time exceeds the set parking time threshold, judging that the power is insufficient due to the overlong parking time, and the storage battery is normal;
if the parking time does not exceed the set parking time threshold, the storage battery is judged to be abnormal, and the storage battery needs to be replaced.
Further, the method for obtaining the threshold value T comprises the following steps:
n1, searching the maximum power consumption W of the storage battery;
n2, the low-voltage power P of the vehicle is searched, and the threshold T is obtained by t=p/W.
Further, the accumulated activation time of the CAN network is recorded, specifically: the CAN working duration recording timer transmits accumulated numbers once every fixed time interval, and the accumulated numbers are sequentially increased; and sent to the bus of the vehicle in a service manner.
Further, after the vehicle bus receives the accumulated activation time of the CAN network, if the vehicle is not connected with a communication signal at the moment, the accumulated activation time record of the CAN network is cached in the DTC library.
Further, if the vehicle is communicated with the communication signal, the accumulated activation time record of the CAN network cached by the DTC library is sent to the cloud.
Further, after the vehicle bus receives the accumulated activation time of the CAN network, if the vehicle is communicated with the communication signal, the accumulated activation time record of the CAN network is directly sent to the cloud.
Further, when the cloud receives that the accumulated working time length in the parking period is greater than the set threshold value T, the cloud reminds the user of abnormal network.
Further, when reminding the user of network abnormality, an abnormality notification is sent to the user's vehicle APP.
An abnormality detection system during parking of a vehicle comprises a parking time recording module, a CAN network monitoring module and a judging module;
the parking time recording module is used for recording the power-down time of the vehicle and the power quantity of the power-down vehicle when the vehicle is parked; when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle;
the CAN network monitoring module is used for monitoring the network state of the CAN in the vehicle power-down period in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network;
the judging module is used for comparing the electric quantity of the vehicle when the vehicle is electrified with the electric quantity of the vehicle when the vehicle is electrified and judging whether the vehicle is deficient or not:
if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
if the accumulated activation time of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
if the accumulated activation time of the CAN network during parking is smaller than the set threshold T, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
The beneficial effects of the invention are as follows:
the invention discloses an abnormality detection method during parking of a vehicle. During parking of the vehicle, the CAN network state of the vehicle is monitored in real time: and detecting an abnormal state of the vehicle during parking according to the CAN network state of the vehicle during parking and the parking time. The invention CAN efficiently and automatically identify the accumulated activation time of the CAN network in the current parking period and judge whether the current power deficiency is caused by the abnormality of the CAN network. If the accumulated time length of CAN network awakening during parking is smaller than the set threshold value T, the CAN network problem is not required to be searched, and whether the accumulated time length is the power shortage caused by storage battery aging is judged instead, and whether the storage battery needs to be replaced is judged.
Compared with the prior art, the invention comprises the following steps:
1. under the condition of cloud signals, the accumulated activation time record of the CAN network is directly sent to the cloud, the root cause of the power deficiency is directly and remotely judged, and the problem of waiting for reproduction is not needed to be manually repeated;
2. by caching the accumulated activation time record to the CAN network into the DTC library, the requirement of abnormal detection on cloud signals is reduced, and specific reasons CAN be queried after the cloud signals are poor in power consumption;
3. aiming at the frequent dormancy wakeup problem, the accumulated activation time of the CAN network recorded by the timer CAN be recorded by inquiring the CAN work duration, and the total network abnormal time CAN be directly inquired, so that whether the abnormality exists or not CAN be conveniently judged.
Therefore, the method provided by the invention solves the problem that the prior art lacks a method for rapidly detecting the power shortage problem of the vehicle during parking, and has the characteristic of saving manpower.
Drawings
Fig. 1 is a flowchart of an abnormality detection method during parking of a vehicle according to the present invention.
Fig. 2 is a schematic diagram of a specific flow of determining abnormality of a vehicle according to an abnormality detection method during parking of the vehicle.
FIG. 3 is a schematic illustration of network activity during parking of a method for anomaly detection during parking of a vehicle in accordance with the present invention.
FIG. 4 is a flow chart of CAN network work records during parking of a method of detecting anomalies during vehicle parking of the present invention.
FIG. 5 is a schematic illustration of CAN network operation records during parking of a method for detecting anomalies during vehicle parking according to the invention.
FIG. 6 is a system module schematic diagram of an anomaly detection system during parking of a vehicle in accordance with the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
Example 1
As shown in fig. 1, a method for detecting an abnormality during parking of a vehicle includes the following steps:
step 1: when the vehicle is parked, recording the power-down time and the power-down electric quantity of the vehicle;
step 2: monitoring the network state of the CAN in the power-down period of the vehicle in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network;
step 3, when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle;
comparing the electric quantity of the vehicle when the power is on with the electric quantity of the vehicle when the power is off, and judging whether the vehicle is deficient in power or not:
step 4.1: if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
step 4.2: if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
step 5.1: if the accumulated activation time of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
step 5.2: if the accumulated activation time of the CAN network during parking is smaller than the set threshold T, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
In this embodiment, the recorded time of powering down the vehicle and the time of powering up the vehicle are Beijing time.
In this embodiment, the CAN network is activated including other ECUs to wake up CAN and itself to wake up CAN.
In this embodiment, the CAN operation duration recording timer records the cumulative activation time of the CAN network in seconds until the CAN bus is dormant.
In this embodiment, the CAN operation duration recording timer stops recording when the vehicle is powered up.
The invention discloses an abnormality detection method during parking of a vehicle. During parking of the vehicle, the CAN network state of the vehicle is monitored in real time: and detecting an abnormal state of the vehicle during parking according to the CAN network state of the vehicle during parking and the parking time. The invention CAN efficiently and automatically identify the accumulated activation time of the CAN network in the current parking period and judge whether the current power deficiency is caused by the abnormality of the CAN network. If the accumulated time length of CAN network awakening during parking is smaller than the set threshold value T, the CAN network problem is not required to be searched, and whether the accumulated time length is the power shortage caused by storage battery aging is judged instead, and whether the storage battery needs to be replaced is judged. The method solves the problem that the prior art lacks a method for rapidly detecting the power shortage problem of the vehicle during parking, and has the characteristic of saving manpower.
Example 2
More specifically, in one embodiment, as shown in fig. 2, a specific flow of determining an abnormality of the vehicle is specifically:
judging whether the vehicle is deficient in power: if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
judging whether the parking time exceeds a set parking time threshold according to the vehicle power-down time and the power-up time;
if the parking time exceeds the set parking time threshold, judging that the power is insufficient due to the overlong parking time, and the storage battery is normal;
if the parking time does not exceed the set parking time threshold, the storage battery is judged to be abnormal, and the storage battery needs to be replaced.
Therefore, the invention CAN directly inquire the total network abnormal time by inquiring the accumulated activation time of the CAN network recorded by the CAN work duration recording timer aiming at the frequent dormancy wakeup problem, thereby realizing convenient judgment of whether the network is abnormal or not.
In this embodiment, the recorded time is Beijing time.
In this embodiment, the threshold t=1 hour; can be specifically set according to actual requirements.
The CAN network is activated and operated (including other ECUs to wake up CAN and wake up CAN themselves), the CAN operation duration recording timer is started again until the CAN bus is dormant again. And ending the timing when the unlocking signal is received. The timing begins as soon as the network is operating during parking.
As shown in fig. 3, in one particular embodiment, the power down time of the vehicle is the time the vehicle signal changes from unlocked to locked;
in one particular embodiment, the power-up time of the vehicle is the time when the vehicle signal changes from latched to unlatched.
In a specific embodiment, the method for obtaining the threshold T is:
n1, searching the maximum power consumption W of the storage battery;
n2, the low-voltage power P of the vehicle is searched, and the threshold T is obtained by t=p/W.
In a specific embodiment, as shown in fig. 4, the accumulated activation time of the CAN network is recorded, specifically: the CAN working duration recording timer transmits accumulated numbers once every fixed time interval, and the accumulated numbers are sequentially increased; and sent to the bus of the vehicle in a service manner.
In this embodiment, when the vehicle is powered down and the whole vehicle enters a locked state, the power-down timestamp is recorded, and the accumulated activation time of the info can network is recorded to the bus.
In this embodiment, the fixed time is 1 minute, or 10 seconds, 30 seconds, or the like, which may be specifically set according to actual requirements.
In this embodiment, the power-down lockout time is also sent to the bus of the vehicle in a service manner; when the electrolytic lock signal is not received, the transmitted end time signal is 00.
In this embodiment, when the vehicle signal changes from locking to unlocking and the whole vehicle switches from locking to unlocking, the power-on time stamp is recorded, and the recording of the accumulated activation time of the info can network to the bus is completed.
In this embodiment, after the vehicle bus receives the accumulated activation time of the CAN network, if the vehicle is not connected with 4g/5g signal at this time and cannot obtain the latest time effective value received directly when the Beijing time is not obtained, the accumulated activation time record to the CAN network is cached in the DTC library.
In this embodiment, the recorded data needs to be cached in a DTC library (EEPROM), and then the cloud is uploaded by using a DTC uploading channel when the network exists.
In this embodiment, the cache stores data for at least 30 days.
In this embodiment, if the vehicle resumes to communicate with the 4g/5g signal, the accumulated activation time record of the CAN network cached in the DTC library is sent to the cloud.
Therefore, the method and the device have the advantages that the accumulated activation time record of the CAN network is cached in the DTC library, so that the requirement of abnormal detection on cloud signals is reduced, and specific reasons CAN be queried after the cloud signals are deficient in places where the cloud signals are bad.
In this embodiment, the related data of the accumulated activation time of the CAN network cached in the DTC library may also be read directly by the device.
In one embodiment, after the vehicle bus receives the accumulated activation time of the CAN network, if the vehicle communicates with the communication signal, the accumulated activation time record of the CAN network is directly sent to the cloud.
In a specific embodiment, when the cloud receives that the accumulated working time length of the parking period is greater than a set threshold value T, the cloud reminds the user of network abnormality.
In one embodiment, when a network abnormality is reminded to a user, an abnormality notification is sent to the user's vehicle APP, informing to make a repair.
Therefore, the invention can directly and remotely judge the root cause of the deficiency of power without waiting for the reproduction problem by manpower.
The method solves the problem that the prior art lacks a method for rapidly detecting the power shortage problem of the vehicle during parking, and has the characteristic of saving manpower.
Example 3
More specifically, in this embodiment, as shown in fig. 5, the time of powering down the vehicle is 2023/2/20 day 17:00, the time of powering up the vehicle is 2023/2/21 day 17:00, and the accumulated activation time of the CAN network recorded during the time is N; at this time, an abnormality during parking of the vehicle is detected:
comparing the electric quantity of the vehicle when the power is on with the electric quantity of the vehicle when the power is off, and judging whether the vehicle is deficient in power or not:
if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
if the accumulated activation time N of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
if the accumulated activation time N of the CAN network is smaller than the set threshold T during parking, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
In one embodiment, the further checking whether the battery is abnormal is specifically:
judging whether the parking time exceeds a set parking time threshold according to the vehicle power-down time and the power-up time;
if the parking time exceeds the set parking time threshold X, judging that the power is insufficient due to the overlong parking time, and the storage battery is normal;
if the parking time does not exceed the set parking time threshold X, the storage battery is judged to be abnormal, and the storage battery needs to be replaced.
Example 4
As shown in fig. 6, an anomaly detection system during parking of a vehicle includes a parking time recording module, a CAN network monitoring module, and a determination module;
the parking time recording module is used for recording the power-down time of the vehicle and the power quantity of the power-down vehicle when the vehicle is parked; when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle;
in this embodiment, the time of powering down the vehicle, the electric quantity during powering down, the time of powering up the vehicle, and the electric quantity during powering up are input to a determination module for determining;
the CAN network monitoring module is used for monitoring the network state of the CAN in the vehicle power-down period in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network;
in the embodiment, the accumulated activation time of the CAN network is input into a judging module for judgment;
in this embodiment, the determining module determines the cause of the power loss of the CAN network according to the input time of the power-down of the vehicle and the power quantity of the power-down, the time of the power-up of the vehicle and the power quantity of the power-up, and the accumulated activation time of the CAN network.
The judging module is used for comparing the electric quantity of the vehicle when the vehicle is electrified with the electric quantity of the vehicle when the vehicle is electrified and judging whether the vehicle is deficient or not:
if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
if the accumulated activation time of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
if the accumulated activation time of the CAN network during parking is smaller than the set threshold T, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (10)

1. A method of detecting an abnormality during parking of a vehicle, characterized by: the method comprises the following specific steps:
when the vehicle is parked, recording the power-down time and the power-down electric quantity of the vehicle;
monitoring the network state of the CAN in the power-down period of the vehicle in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network;
when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle;
comparing the electric quantity of the vehicle when the power is on with the electric quantity of the vehicle when the power is off, and judging whether the vehicle is deficient in power or not:
if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
if the accumulated activation time of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
if the accumulated activation time of the CAN network during parking is smaller than the set threshold T, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
2. The abnormality detection method during parking of a vehicle according to claim 1, characterized in that: the further inspection battery is unusual, specifically:
judging whether the parking time exceeds a set parking time threshold according to the vehicle power-down time and the power-up time;
if the parking time exceeds the set parking time threshold, judging that the power is insufficient due to the overlong parking time, and the storage battery is normal;
if the parking time does not exceed the set parking time threshold, the storage battery is judged to be abnormal, and the storage battery needs to be replaced.
3. The abnormality detection method during parking of a vehicle according to claim 1, characterized in that: the method for obtaining the threshold T comprises the following steps:
n1, searching the maximum power consumption W of the storage battery;
n2, the low-voltage power P of the vehicle is searched, and the threshold T is obtained by t=p/W.
4. The abnormality detection method during parking of a vehicle according to claim 1, characterized in that: recording the accumulated activation time of the CAN network, which is specifically as follows: the CAN working duration recording timer transmits accumulated numbers once every fixed time interval, and the accumulated numbers are sequentially increased; and sent to the bus of the vehicle in a service manner.
5. The abnormality detection method during parking of a vehicle according to claim 1, characterized in that: after the vehicle bus receives the accumulated activation time of the CAN network, if the vehicle is not connected with a communication signal at the moment, the accumulated activation time record of the received CAN network is cached in the DTC library.
6. The abnormality detection method during parking of a vehicle according to claim 5, characterized in that: and if the vehicle is communicated with the communication signal, the accumulated activation time record of the CAN network cached by the DTC library is sent to the cloud.
7. The abnormality detection method during parking of a vehicle according to claim 1, characterized in that: after the vehicle bus receives the accumulated activation time of the CAN network, if the vehicle is communicated with the communication signal, the accumulated activation time record of the CAN network is directly sent to the cloud.
8. The abnormality detection method during parking of a vehicle according to claim 7, characterized in that: and when the cloud receives that the accumulated working time length in the parking period is greater than the set threshold T, reminding the user of abnormal network.
9. The abnormality detection method during parking of a vehicle according to claim 8, characterized in that: when reminding the user of network abnormality, sending an abnormality notification to the user's vehicle APP.
10. An abnormality detection system during parking of a vehicle, characterized by: the system comprises a parking time recording module, a CAN network monitoring module and a judging module;
the parking time recording module is used for recording the power-down time of the vehicle and the power quantity of the power-down vehicle when the vehicle is parked; when the vehicle is electrified, recording the time of the electrification of the vehicle and the electric quantity of the electrified vehicle;
the CAN network monitoring module is used for monitoring the network state of the CAN in the vehicle power-down period in real time: if the CAN network is activated during the power-down period of the vehicle, starting a CAN work duration recording timer to record the accumulated activation time of the CAN network;
the judging module is used for comparing the electric quantity of the vehicle when the vehicle is electrified with the electric quantity of the vehicle when the vehicle is electrified and judging whether the vehicle is deficient or not:
if the vehicle does not have the electricity deficiency, judging that the vehicle is not abnormal;
if the vehicle is deficient in power, checking the accumulated activation time of the CAN network between the power-down time and the power-up time of the vehicle;
if the accumulated activation time of the CAN network in the parking period is greater than a set threshold T, judging that the CAN network is abnormal, and checking the cause of the CAN network abnormality;
if the accumulated activation time of the CAN network during parking is smaller than the set threshold T, judging that the CAN network is abnormal, and further checking whether the storage battery is abnormal.
CN202310612581.3A 2023-05-26 2023-05-26 Abnormality detection method and system during parking of vehicle Pending CN116593919A (en)

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Application Number Priority Date Filing Date Title
CN202310612581.3A CN116593919A (en) 2023-05-26 2023-05-26 Abnormality detection method and system during parking of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310612581.3A CN116593919A (en) 2023-05-26 2023-05-26 Abnormality detection method and system during parking of vehicle

Publications (1)

Publication Number Publication Date
CN116593919A true CN116593919A (en) 2023-08-15

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Application Number Title Priority Date Filing Date
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