CN111007838A - Electric vehicle fault repairing method - Google Patents
Electric vehicle fault repairing method Download PDFInfo
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- CN111007838A CN111007838A CN201911313355.5A CN201911313355A CN111007838A CN 111007838 A CN111007838 A CN 111007838A CN 201911313355 A CN201911313355 A CN 201911313355A CN 111007838 A CN111007838 A CN 111007838A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012423 maintenance Methods 0.000 claims abstract description 21
- 230000002159 abnormal effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 4
- 230000008439 repair process Effects 0.000 abstract description 6
- 238000003745 diagnosis Methods 0.000 description 11
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0262—Confirmation of fault detection, e.g. extra checks to confirm that a failure has indeed occurred
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The invention discloses a fault repairing method for an electric vehicle, which comprises the following steps of obtaining a first VIN code stored in a vehicle control unit through a diagnostic instrument; the diagnostic instrument compares the first VIN code with all the VIN codes stored in the diagnostic instrument and judges whether the first VIN code is normal or not; when the first VIN code is abnormal, the diagnostic instrument acquires a second VIN code according to the bar code on the electric vehicle and transmits the second VIN code to the vehicle control unit for storage. When the VIN code stored in the vehicle control unit of the electric vehicle is abnormal, the correct VIN code of the electric vehicle is written into the vehicle control unit and stored, the restoration of the abnormal VIN code originally stored in the vehicle control unit is completed, the vehicle control unit does not need to be sent to a repair shop for reparation, the time is saved, and the maintenance efficiency is improved.
Description
Technical Field
The invention relates to the technical field of automobile fault diagnosis instruments, in particular to a fault repairing method for an electric automobile.
Background
With the development of industrial informatization and the requirement for environmental friendliness, electric automobiles are increasingly popular in the market, but since electric automobiles are developed later and the market does not know the electric automobiles well, the electric automobiles have frequent faults, the electric automobiles in the market at present are all composed of systems such as a vehicle control unit, a direct current voltage reducer DCDC, a battery management system BMS, a motor, a cooling system, an air compressor, a steering system and a high-voltage distribution box, and the diagnosis of the electric automobiles is actually to diagnose the systems.
Chinese patent document CN101286067A discloses a vehicle-mounted vehicle fault diagnosis instrument, which includes a signal processing module connected with a diagnosis joint of a vehicle diagnosis seat through a diagnosis interface; and the communication control module, the communication interface module, the memory module, the main control module, the liquid crystal display module and the power supply module. The vehicle-mounted automobile fault diagnosis instrument has the advantages that the independent CPU is provided, the cost is low, the fault diagnosis requirements of various automobile engines can be met, and the diagnosis effect is good.
However, the diagnostic device disclosed by the patent is single in function, when a vehicle identification Number (abbreviated as a VIN code) stored in the vehicle controller is lost or fails, the correct VIN code can only be written into the vehicle controller by returning the vehicle controller to a manufacturer for repair, the correct VIN code cannot be directly written into the vehicle controller through the diagnostic device, time and labor are wasted, and the VIN code is easily input by a maintenance worker for many times due to an input error in a manual mode, so that the maintenance efficiency is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fault repairing method for an electric vehicle, which can directly write a VIN code consistent with a bar code on the electric vehicle through a diagnostic instrument when the VIN code stored in a vehicle control unit of the electric vehicle is abnormal, thereby saving time and improving maintenance efficiency.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a fault repairing method for an electric automobile comprises the following steps:
acquiring a first VIN code stored in the vehicle control unit through a diagnostic instrument;
the diagnostic instrument compares the first VIN code with all the VIN codes stored in the diagnostic instrument and judges whether the first VIN code is normal or not;
and when the first VIN code is abnormal, the diagnostic instrument acquires a second VIN code according to a bar code on the electric vehicle and transmits the second VIN code to the vehicle control unit for storage.
On the basis of the technical scheme, the diagnostic instrument and the vehicle control unit are provided with the same encryption and decryption algorithms;
transmitting the second VIN code to the vehicle control unit for storage, and specifically comprising the following steps:
s31: the diagnostic instrument performs data operation on the second VIN code through an encryption and decryption algorithm to obtain a first operation result, and transmits the second VIN code and the first operation result to a cache of the vehicle control unit;
s32: the vehicle control unit performs data operation on the second VIN code through an encryption and decryption algorithm, and calculates to obtain a second operation result;
s33: the vehicle control unit compares the second operation result with the first operation result, and if the second operation result is the same as the first operation result, the vehicle control unit stores the second VIN code into a memory of the vehicle control unit; if not, the second VIN code is obtained again, and the process goes to step S31.
On the basis of the technical scheme, the encryption and decryption algorithm is the AES128 encryption standard.
On the basis of the above technical solution, the diagnostic apparatus compares the first VIN code with all stored VIN codes therein, and determines whether the first VIN code is normal, specifically including the following steps:
the diagnostic instrument traverses all stored VIN codes;
if the first VIN code is equal to one of all the VIN codes stored in the diagnostic instrument, judging that the first VIN code is normal;
and if the first VIN code is not equal to all the VIN codes stored in the diagnostic instrument, judging that the first VIN code is abnormal.
On the basis of the technical scheme, the diagnostic instrument acquires a second VIN code of the vehicle according to the bar code on the electric vehicle, and the method specifically comprises the following steps:
and the diagnostic instrument scans a bar code on the electric automobile to obtain the second VIN code.
On the basis of the technical scheme, the method further comprises the following steps:
acquiring a fault message stored in the vehicle control unit through a diagnostic instrument;
analyzing the fault message and generating a fault code;
and judging the corresponding fault type of the electric automobile according to the fault code, and outputting a corresponding solution.
On the basis of the technical scheme, the method further comprises the following steps:
acquiring maintenance information of the electric vehicle stored in the vehicle control unit through the diagnostic instrument;
and comparing the maintenance information with a preset threshold value, and judging whether the electric automobile needs to be maintained.
On the basis of the technical scheme, the maintenance information comprises the driving mileage and the past maintenance time.
On the basis of the technical scheme, the method further comprises the following steps:
acquiring running information and battery information of the electric automobile through a diagnostic instrument;
and inputting the running information and the battery information into a preset battery life prediction model to obtain the actual life of the battery.
On the basis of the technical scheme, the driving information comprises service life and driving mileage; the battery information includes an accumulated power consumption amount, a charge-discharge electric power limit value, and a charge-discharge time.
Compared with the prior art, the invention has the advantages that:
(1) according to the electric vehicle fault repairing method, when the VIN code stored in the vehicle controller of the electric vehicle is abnormal, the correct VIN code of the electric vehicle is written into the vehicle controller and stored, the repairing of the abnormal VIN code originally stored in the vehicle controller is completed, the vehicle controller does not need to be sent to a repair shop for repairing again, the time is saved, and the maintenance efficiency is improved.
(2) The method for repairing the fault of the electric vehicle realizes the process of safely writing the VIN code into the diagnostic apparatus by the encryption and decryption algorithm, and only allows an operator to write the VIN code when the VIN code is written, and the double protection of the diagnostic apparatus is enhanced.
Drawings
Fig. 1 is a flowchart of a method for repairing a fault of an electric vehicle according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
referring to fig. 1, in an embodiment of the present invention, an electric vehicle fault repairing method is provided, where a dc step-down device DCDC, a battery management system BMS, a motor, a cooling system, an air compressor, a steering system, a high-voltage distribution box and other systems of the electric vehicle are respectively provided with their own controllers, a vehicle controller is connected to the DCDC, the BMS, the motor, the cooling system, the air compressor, the steering system, the high-voltage distribution box and other systems through a bus, and when an electric vehicle needs to be diagnosed, a diagnostic instrument is connected to the bus and reads information of all controllers on the bus through the bus. Or, some systems have own controllers, and some systems have no controllers, and the systems with the controllers are connected with the whole vehicle controller through a bus, and the diagnostic instrument reads the system information and faults from the bus; the information and the faults of the systems without the controllers are collected by the vehicle controller, and the information and the faults of the systems are read from the vehicle controller through the bus by the diagnostic instrument. The electric vehicle fault repairing method in the embodiment 1 of the invention comprises the following steps:
s1: the diagnostic instrument is connected with a bus of the electric vehicle, and a first Vehicle Identification Number (VIN) code stored in the vehicle control unit is obtained through a command of reading the VIN code of the vehicle;
s2: VIN codes of various types of electric vehicles are stored in the diagnostic instrument in advance, the diagnostic instrument compares the first VIN code with all the VIN codes stored in the diagnostic instrument, and judges whether the first VIN code is normal (whether the first VIN code is lost or messy);
s3: when the first VIN code is abnormal (lost or messy), the bar code of the VIN code is arranged on the body of each electric vehicle, and the diagnostic instrument can acquire the second VIN code of the electric vehicle according to the bar code on the electric vehicle and transmit the second VIN code to the vehicle controller for storage. Therefore, the correct VIN code of the electric automobile is written into the vehicle control unit and stored, the repair of the originally stored abnormal VIN code in the vehicle control unit is completed, the vehicle control unit does not need to be sent to a repair shop for repair again, the time is saved, and the maintenance efficiency is improved.
Preferably, an encryption and decryption algorithm is configured in the vehicle control unit of the electric vehicle in advance, and then an encryption and decryption algorithm which is the same as that of the vehicle control unit is configured in the diagnostic instrument, so that the function of writing the VIN code into the vehicle control unit can be realized only by the diagnostic instrument which has the same encryption and decryption algorithm as that of the vehicle control unit, and the VIN code is prevented from being input into the vehicle control unit by other diagnostic instruments which do not have authorization.
In step S3, the second VIN code is transmitted to the vehicle control unit for storage, which specifically includes the following steps:
s31: the diagnostic instrument performs data operation on the second VIN code (such as 123) through an encryption and decryption algorithm, the data operation is 123+2, a first operation result is obtained through calculation, the first operation result is 125, and the second VIN code (123) and the first operation result (125) are transmitted to a cache of the whole vehicle controller;
s32: the vehicle control unit performs data operation on the second VIN code (123) through an encryption and decryption algorithm, wherein the data operation is 123+2, and a second operation result is obtained through calculation, and the second operation result is 125;
s33: the vehicle control unit compares the second operation result (125) with the first operation result (125), and if the second operation result is the same as the first operation result and the second operation result (125) is the same as the first operation result (125), the vehicle control unit stores the second VIN code (123) in the memory of the vehicle control unit for permanent storage; if the second operation result is different from the first operation result, the second VIN code is obtained again according to the barcode on the electric vehicle body, and the process goes to step S31 to perform data operation on the second VIN code again, until the second operation result and the first operation result, the second VIN code is stored in the memory of the vehicle control unit for permanent storage.
In the embodiment 1 of the invention, the VIN code is safely written into the diagnostic apparatus through an encryption and decryption algorithm, and when the VIN code is written, the operation of writing the VIN code is allowed to be performed by an operator only by login authorization, so that the double protection of the diagnostic apparatus is enhanced.
The encryption and decryption algorithm in the embodiment of the invention is preferably an AES128 encryption standard, which is also called an advanced encryption standard Rijndael encryption method and is easy to implement on various hardware and software, and the AES encryption has a plurality of Rounds of repetition and transformation, and comprises the following steps of ① Key Expansion (Key Expansion), ② initial Round (InitialRound), ③ repeated Rounds (Rounds), each repeated Round comprising operations such as byte subtraction (SubBytes), row shifting (ShiftRows), column mixing (MixColumns) and Round Key addition (AddRoundKey), ① Final Round (Final Round), and Final Round having no column mixing operation (MixColumns), so that the encryption standard AES128 encryption is safer, the operation speed is higher, and the fast writing and safety judgment of VIN codes are realized.
Example 2:
the basic contents of embodiment 2 of the present invention are the same as embodiment 1, except that:
in step S2, the diagnostic apparatus compares the first VIN code with all stored VIN codes, and determines whether the first VIN code is normal, specifically including the following steps:
s21: the diagnostic instrument traverses all stored VIN codes and compares the first VIN code with all the stored VIN codes one by one;
s22: if the first VIN code is equal to one of all the VIN codes stored in the diagnostic instrument, judging that the first VIN code is normal, and indicating that the first VIN code is not damaged and is normal;
s23: if the first VIN code is not equal to all the VIN codes stored in the diagnostic instrument, the first VIN code is judged to be abnormal, which indicates that the first VIN code does not belong to any VIN code stored in the diagnostic instrument, and indicates that the first VIN code has errors, and the first VIN code is abnormal and needs to be repaired in the vehicle controller, and the correct VIN code is written in.
Example 3:
the basic contents of embodiment 3 of the present invention are the same as embodiment 1, except that:
in step S3 of embodiment 3 of the present invention, the diagnostic apparatus obtains the second VIN code of the vehicle according to the barcode on the electric vehicle, and specifically includes the following steps:
the diagnostic instrument scans the bar code on the electric vehicle to obtain a second VIN code. The second VIN code is directly obtained by scanning the bar code, and compared with the VIN code manually input, the accuracy is higher, and the diagnosis efficiency is improved.
Example 4:
the basic contents of embodiment 4 of the present invention are the same as embodiment 1, except that:
the electric vehicle fault repairing method of the embodiment 4 of the invention further comprises the following steps:
s4: the fault messages of all systems are stored in the vehicle controller, the diagnostic instrument is connected to the bus, the diagnostic instrument obtains the fault messages stored in the vehicle controller, and the fault messages are packaged according to a unified standard such as SAEJ1939 or ISO 14229;
s5: the diagnostic device analyzes the fault message according to the packaging standard of the fault message and generates a fault code;
s6: and judging the corresponding fault type of the electric automobile according to the fault code, and outputting a corresponding solution. For example, the diagnostic device resolves the fault code 123, 123 to represent the power supply voltage fault, and outputs a corresponding solution for resolving the power supply voltage fault for reference by the service personnel.
Because the fault data generated by the automobile fault diagnosis instrument is represented by the fault codes, a user can only know the fault generated by the automobile according to the fault codes, the user is not clear about the fault caused by any reason, and the user needs to sequentially confirm whether each component is normal through a service manual and the like to search the fault generation part causing the fault condition, so that the working efficiency of the user for repairing the automobile is low. In embodiment 4 of the present invention, by configuring solutions corresponding to the fault codes in the diagnostic apparatus, after the diagnostic apparatus analyzes the fault code corresponding to the fault message, the corresponding solution is displayed, so as to directly provide a maintenance solution, and improve maintenance efficiency.
Example 5:
the basic contents of the embodiment 5 of the present invention are the same as those of the embodiment 1, except that:
the method further comprises the following steps:
s7: acquiring maintenance information of the electric vehicle stored in the vehicle control unit through a diagnostic instrument, wherein the maintenance information comprises driving mileage and past maintenance time;
s8: and comparing the maintenance information with a preset threshold value, and judging whether the electric automobile needs to be maintained. For example, when the vehicle needs to be maintained after 5 kilometers of driving or the last maintenance time is half a year from now, and the diagnostic instrument obtains that the driving mileage of the vehicle is 5.5 kilometers or obtains that the last maintenance time is more than half a year from now, it is determined that the electric vehicle needs to be maintained, and maintenance prompt information is input to the vehicle control unit to prompt the vehicle owner that the vehicle needs to be maintained.
Example 6:
the basic contents of embodiment 6 of the present invention are the same as embodiment 1, except that:
the method further comprises the following steps:
s9: acquiring running information and battery information of the electric automobile through a diagnostic instrument; the driving information comprises service life and driving mileage; the battery information includes an accumulated power consumption amount, a charge-discharge electric power limit value, and a charge-discharge time.
S10: and inputting the running information and the battery information into a preset battery life prediction model to obtain the actual life of the battery. The ideal life of the battery of the vehicle can be obtained through the running information, but because the habits of vehicle owners on the use of the battery are different, the actual loss condition of the battery is also different, and the actual life of the battery of the electric vehicle cannot be accurately judged only according to the running information and the battery information of the electric vehicle, the ideal life of the battery needs to be increased or decreased in combination with the battery information, so that the actual life of the battery is obtained. For example: judging the ideal service life of a battery of the vehicle to be 5 years according to the service life of the vehicle and the driving mileage, and judging that the actual service life of the output battery is 5 years and 5 months if the electric quantity of the battery is within the range of 30-70% in more than 90% of the time according to the previous battery electric quantity service condition, which indicates that the vehicle using habit of a driver is good, and the expected service life of the battery of the vehicle is 5 months added to the ideal service life; if the time of more than 30% is in the range of less than 30% of the electric quantity, which indicates that the driver often uses low-electric quantity vehicle, the expected life of the vehicle battery is reduced by 5 months on the basis of the ideal life, and the actual life of the output battery is 4 years and 7 months. Therefore, the actual service life of the battery of the electric automobile can be obtained, and meanwhile, the automobile owner can be reminded to keep good automobile using habits, so that the service life of the battery of the electric automobile is prolonged.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. The method for repairing the fault of the electric automobile is characterized by comprising the following steps:
acquiring a first VIN code stored in the vehicle control unit through a diagnostic instrument;
the diagnostic instrument compares the first VIN code with all the VIN codes stored in the diagnostic instrument and judges whether the first VIN code is normal or not;
and when the first VIN code is abnormal, the diagnostic instrument acquires a second VIN code according to a bar code on the electric vehicle and transmits the second VIN code to the vehicle control unit for storage.
2. The electric vehicle fault repairing method according to claim 1, wherein the diagnostic instrument and the vehicle control unit are provided with the same encryption and decryption algorithm;
transmitting the second VIN code to the vehicle control unit for storage, and specifically comprising the following steps:
s31: the diagnostic instrument performs data operation on the second VIN code through an encryption and decryption algorithm to obtain a first operation result, and transmits the second VIN code and the first operation result to a cache of the vehicle control unit;
s32: the vehicle control unit performs data operation on the second VIN code through an encryption and decryption algorithm, and calculates to obtain a second operation result;
s33: the vehicle control unit compares the second operation result with the first operation result, and if the second operation result is the same as the first operation result, the vehicle control unit stores the second VIN code into a memory of the vehicle control unit; if not, the second VIN code is obtained again, and the process goes to step S31.
3. The electric vehicle fault repairing method according to claim 2, wherein the encryption and decryption algorithm is the AES128 encryption standard.
4. The method for repairing an electric vehicle fault according to claim 1, wherein the diagnostic apparatus compares the first VIN code with all stored VIN codes, and determines whether the first VIN code is normal, specifically comprising the following steps:
the diagnostic instrument traverses all stored VIN codes;
if the first VIN code is equal to one of all the VIN codes stored in the diagnostic instrument, judging that the first VIN code is normal;
and if the first VIN code is not equal to all the VIN codes stored in the diagnostic instrument, judging that the first VIN code is abnormal.
5. The method for repairing the fault of the electric vehicle as claimed in claim 1, wherein the diagnostic device obtains the second VIN code of the vehicle according to the barcode on the electric vehicle, and specifically comprises the following steps:
and the diagnostic instrument scans a bar code on the electric automobile to obtain the second VIN code.
6. The method for repairing a fault in an electric vehicle according to claim 1, further comprising the steps of:
acquiring a fault message stored in the vehicle control unit through a diagnostic instrument;
analyzing the fault message and generating a fault code;
and judging the corresponding fault type of the electric automobile according to the fault code, and outputting a corresponding solution.
7. The method for repairing a fault in an electric vehicle according to claim 1, further comprising the steps of:
acquiring maintenance information of the electric vehicle stored in the vehicle control unit through the diagnostic instrument;
and comparing the maintenance information with a preset threshold value, and judging whether the electric automobile needs to be maintained.
8. The method of repairing a fault in an electric vehicle of claim 7, wherein the service information includes mileage and past service time.
9. The method for repairing a fault in an electric vehicle according to claim 1, further comprising the steps of:
acquiring running information and battery information of the electric automobile through a diagnostic instrument;
and inputting the running information and the battery information into a preset battery life prediction model to obtain the actual life of the battery.
10. The electric vehicle fault repairing method according to claim 9, wherein the driving information includes an age and a mileage; the battery information includes an accumulated power consumption amount, a charge-discharge electric power limit value, and a charge-discharge time.
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