CN113071316A - New energy automobile ECU power-on and power-off abnormity diagnosis and correction system and method - Google Patents
New energy automobile ECU power-on and power-off abnormity diagnosis and correction system and method Download PDFInfo
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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Abstract
The invention discloses a new energy automobile ECU power-on and power-off abnormity diagnosis and correction system.A principle library establishing module of the system is used for establishing an ECU power-on and power-off time sequence change principle database; the knowledge base establishing module is used for establishing an ECU power-on and power-off abnormal knowledge database; the ECU power-on and power-off time sequence monitoring module is used for monitoring the ECU power-on and power-off time sequence change in real time based on the Internet of vehicles; and the ECU power-on and power-off timing sequence correction module carries out power-on and power-off timing sequence diagnosis on the real-time ECU power-on and power-off timing sequence according to the ECU power-on and power-off abnormal knowledge data in the ECU power-on and power-off abnormal knowledge database, and carries out power-on and power-off timing sequence correction according to the ECU power-on and power-off timing sequence change principle data in the ECU power-on and power-off timing sequence change principle database. According to the invention, the state backtracking of relevant signals and the automatic locking of problem knowledge can be realized when the new energy automobile fails to power on and off, the power on and off time sequence of the automobile can be corrected on line or manually, and the power on and off time sequence of the automobile is optimized.
Description
Technical Field
The invention relates to the technical field of vehicle diagnosis, in particular to a system and a method for diagnosing and correcting an up-down power abnormality of an Electronic Control Unit (ECU) of a new energy vehicle.
Background
The new energy automobile often fails to be powered on and powered off due to the fact that the power-on and power-off time sequence is unreasonably designed, and in order to avoid the situations, the ECU power-on and power-off abnormity needs to be diagnosed in real time, and the power-on and power-off time sequence needs to be corrected in time. At present, when power-on and power-off abnormity occurs, manual analysis is mostly performed through data collection, problems cannot be locked quickly and visually, and efficiency is low.
In order to solve the above problems, chinese patent CN106004510A discloses a high-low voltage power-on and power-off time sequence control method for a pure electric vehicle, which belongs to the technical field of new energy vehicle electronic control, and comprises: activating KL15, enabling the VCU to enter a waiting mode from a sleep mode and keep for T1 time, and judging whether the activation state of KL15 is changed; if the KL15 state is not changed, the VCU enters an operation mode, controls the low-voltage controller to complete pressure maintaining power-on self-test and receives an operation mode signal fed back by the low-voltage controller; the VCU receives an operation mode signal fed back by the low-voltage controller, sends a high-voltage power-on request instruction to each high-voltage load controller, and sends an ECU on-off control relay closing instruction to the BMS; the high voltage power-up process is completed, the KL15 is disconnected, the VCU enters the waiting mode from the operation mode for a time T2: and judging whether the KL15 disconnection state is changed or not, and if the KL15 state is not changed, controlling the whole vehicle power system to complete the high-low voltage power-off process by the VCU. Although the scheme discloses that the VCU enters an operation mode and controls the low-voltage controller to complete pressure-maintaining power-on self-test, an upper power-on and lower power-off abnormity diagnosis model is not constructed, and abnormity diagnosis efficiency is influenced.
Disclosure of Invention
The invention aims to provide a system and a method for diagnosing and correcting the power-on and power-off abnormity of an ECU (electronic control unit) of a new energy automobile.
In order to achieve the purpose, the invention provides a new energy automobile ECU power-on and power-off abnormity diagnosis and correction system, which is characterized in that: the device comprises a principle base establishing module, a knowledge base establishing module, an ECU power-on and power-off time sequence monitoring module and an ECU power-on and power-off time sequence correcting module, and is characterized in that: the principle base establishing module is used for establishing an ECU power-on and power-off time sequence change principle database; the knowledge base establishing module is used for establishing an ECU power-on and power-off abnormal knowledge database; the ECU power-on and power-off time sequence monitoring module is used for monitoring the ECU power-on and power-off time sequence change in real time based on the Internet of vehicles; and the ECU power-on and power-off time sequence correction module is used for carrying out power-on and power-off time sequence diagnosis on the real-time ECU power-on and power-off time sequence according to the ECU power-on and power-off abnormal knowledge database and carrying out power-on and power-off time sequence correction according to the ECU power-on and power-off time sequence change principle database.
The invention has the beneficial effects that:
the invention establishes the ECU power-on and power-off time sequence change principle and the ECU power-on and power-off abnormal knowledge database, utilizes the ECU power-on and power-off abnormal knowledge database to carry out real-time monitoring and diagnosis on the ECU power-on and power-off time sequence, and utilizes the ECU power-on and power-off time sequence change principle to accurately correct the ECU power-on and power-off time sequence, thereby realizing high-efficiency ECU power-on and power-off time sequence optimization.
According to the invention, the power-on and power-off abnormity diagnosis model is constructed by establishing the ECU power-on and power-off time sequence change principle library and the abnormity knowledge library, the power-on and power-off time sequence change condition of each ECU is obtained in real time, converted into a data type which can be identified by Matlab, introduced into the power-on and power-off abnormity diagnosis model, displayed on a visual interface, and the abnormal data is corrected. The fault reason can be quickly locked based on the diagnosis knowledge base power-on and power-off abnormity diagnosis model. Visualization can be realized through MATLAB UI interface design, and the power-on and power-off time sequence is demonstrated. The online monitoring, diagnosis and correction can be realized in real time through an MATLAB programming, diagnosis and correction model.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the knowledge of the electrical abnormality of the ECU;
FIG. 3 is a timing chart of the change of the power-on and power-off timing of the ECU;
the system comprises a principle base establishing module, a knowledge base establishing module, an ECU power-on and power-off time sequence monitoring module, and an ECU power-on and power-off time sequence correcting module, wherein the principle base establishing module is 1, the knowledge base establishing module is 2, the ECU power-on and power-off time sequence monitoring module is 3, and the ECU power-on and power-off.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 1, the system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle comprises a principle base establishing module 1, a knowledge base establishing module 2, an ECU power-on and power-off timing sequence monitoring module 3 and an ECU power-on and power-off timing sequence correcting module 4, wherein the principle base establishing module 1 is used for establishing an ECU power-on and power-off timing sequence change principle database; the knowledge base establishing module 2 is used for establishing an ECU power-on and power-off abnormal knowledge database; the ECU power-on and power-off time sequence monitoring module 3 is used for monitoring the ECU power-on and power-off time sequence change in real time based on the Internet of vehicles; and the ECU power-on and power-off timing sequence correction module 4 is used for carrying out power-on and power-off timing sequence diagnosis on the real-time ECU power-on and power-off timing sequence according to the ECU power-on and power-off abnormal knowledge database and carrying out power-on and power-off timing sequence correction on the database according to the ECU power-on and power-off timing sequence change principle.
In the above technical solution, the ECU has an abnormal Power-On/Power-off state that the Power-On/Power-off time exceeds a threshold value, and the ECU cannot Power On/Power off and cannot normally Power On/Power off, and includes a VCU (Vehicle control unit), an OBC (On-board Charger) control unit, a DC/DC (Direct Current Converter) control unit, a BMS (Battery Management System) control unit, and an EPS (Electric Power Steering) control unit.
In the above technical solution, the principle of the ECU power-on and power-off time sequence change of the principle base establishing module 1 includes:
principle 1: when the key gear is ACC/ON, triggering the ECU to wake up, and when the key gear is OFF/ACC, triggering the ECU to sleep;
principle 2: the gear triggering is a necessary condition for each ECU time sequence change, each ECU needs to be electrified for self-checking before the time sequence change, ECU state information communication is carried out with other ECUs (for example, the MCU not only needs self-checking but also knows the self-checking condition of the BMS), the ECU is connected with the storage battery voltage permission judgment (each controller judges whether the storage battery is allowed to be connected or not, namely self-checking), and the ECU on-off control relay is in a closed state (whether the current relay and the ECU are open circuits or not is judged, the relay is closed after a series of self-checking and communication are not problematic, and the circuit is connected);
principle 3: when each ECU is connected with the voltage of a storage battery (the ECU is connected with a 200-750V high-voltage storage battery circuit, a relay is closed), after a wake-up instruction is received, the change of a time sequence is generated only after a preset time A is waited, wherein the preset waiting time A comprises power-on self-detection time, ECU state information communication time with other ECUs, ECU on-off control relay action time and ECU battery voltage connection permission judgment time (0.3 s);
principle 4: when each ECU cuts off the voltage of the storage battery, after a sleep command is received, the ECU power-on and power-off time sequence changes after waiting for a preset time B, and the waiting time B is the sleep time.
In the above technical solution, the ECU power-on and power-off abnormality knowledge database includes the following ECU power-on and power-off abnormality knowledge data, as shown in fig. 2:
when the MCU (Motor Controller Unit) fails to pass the self-checking, or the MCU self-checking time setting exceeds the MCU self-checking time threshold (210ms) or the MCU and VCU communication time setting is less than the MCU and VCU communication time threshold (300ms), the VCU cannot receive the communication signal of the MCU, and if the communication interruption time of the VCU and the MCU exceeds the MCU and VCU communication time, the VCU has abnormal voltage of a battery;
when the self-checking of the OBC control unit is failed or the self-checking time setting of the OBC control unit exceeds the self-checking time threshold (300ms) of the OBC control unit or the communication time setting of the OBC control unit and the VCU is less than the communication time threshold (300ms) of the OBC control unit and the VCU, the VCU cannot receive the communication signal of the OBC control unit, and if the communication interruption time of the VCU and the OBC control unit exceeds the communication time of the OBC control unit and the VCU, the VCU is abnormal in voltage of the storage battery;
when the self-test of the DC/DC control unit is not passed or the self-test time setting of the DC/DC control unit exceeds the self-test time threshold (300ms) of the DC/DC control unit or the communication time setting of the DC/DC control unit and the VCU is less than the communication time threshold (300ms) of the DC/DC control unit and the VCU, the VCU cannot receive the communication signal of the DC/DC control unit, and if the communication interruption time of the VCU and the DC/DC control unit exceeds the communication time of the DC/DC control unit and the VCU, the VCU has the abnormal voltage of a battery which is connected.
In the above technical solution, the ECU power-on and power-off abnormality knowledge database further includes the following ECU power-on and power-off abnormality knowledge data:
when the BMS control unit fails to perform self-checking or the BMS control unit self-checking time setting exceeds a BMS control unit self-checking time threshold (300ms) or the BMS control unit and VCU communication time setting is less than the BMS control unit and VCU communication time threshold (300ms), the VCU cannot receive the communication signal of the BMS control unit, and if the communication interruption time of the VCU and the BMS control unit exceeds the BMS control unit and VCU communication time, the VCU has abnormal voltage of a battery connected;
when the EPS control unit fails to pass the self-checking, or the self-checking time setting of the EPS control unit exceeds the self-checking time threshold (300ms) of the EPS control unit, or the communication time setting of the EPS control unit and the VCU is less than the communication time threshold (400ms) of the EPS control unit and the VCU, the VCU cannot receive the communication signal of the EPS control unit, and if the communication interruption time of the VCU and the EPS control unit exceeds the communication time of the EPS control unit and the VCU, the VCU is abnormal in the voltage of the storage battery;
when the BMS control unit self-checking is failed or the BMS control unit self-checking time setting exceeds a BMS control unit self-checking time threshold value (300ms) or the communication time setting of the BMS control unit and the OBC control unit is less than a BMS control unit and OBC control unit communication time threshold value (300ms), the OBC control unit cannot receive the communication signal of the BMS control unit, and if the communication interruption time of the 0BC control unit and the BMS control unit exceeds the communication time of the BMS control unit and the OBC, the OBC is switched on abnormally.
In the above technical solution, the ECU power-on and power-off abnormality knowledge database further includes the following ECU power-on and power-off abnormality knowledge data:
when the key gear is changed from an OFF gear to an ACC gear to an OFF gear, if the ACC gear duration is less than the ACC gear duration threshold (1s), each ECU has an abnormal condition of battery voltage connection;
when the key gear is changed from an OFF gear to an ACC gear to an ON gear to an OFF gear, if the gear duration time of the ACC + ON gear is less than the gear duration time threshold (1.5s) of the ACC + ON gear, each ECU has the abnormal condition of the voltage of the battery;
when the key gear is changed from an OFF gear to an ACC gear to an ON gear to a START gear to an OFF gear, if the gear duration of the ACC + ON + START gear is less than the gear duration threshold (1.5s) of the ACC + ON + START gear, each ECU has an abnormal condition of turning ON the battery voltage;
when the key gear is changed from an OFF gear to an ACC gear to an ON gear to a START gear to an ON gear to an OFF gear, if the gear duration of the ACC + ON + START gear is less than the gear duration threshold (1.5s) of the ACC + ON + START gear, each ECU has an abnormal condition of connecting the battery voltage;
when the key range is changed from the OFF range to the ACC range to the ON range to the START range to the ON range to the ACC range to the OFF range, if the range duration of the ACC + ON + START range is less than the range duration threshold (1.5s) of the ACC + ON + START range, each ECU may have an abnormal condition of turning ON the battery voltage.
In the above technical solution, the ECU power-on and power-off abnormality knowledge database further includes the following ECU power-on and power-off abnormality knowledge data:
the voltage abnormity of the ECU switched-on storage battery caused by the fact that the response time of the pre-charge ECU on-off control relay exceeds the response time threshold (0.2s) of the pre-charge relay, or the response time of the anode ECU on-off control relay exceeds the response time threshold (0.2s) of the anode relay, or the response time of the cathode ECU on-off control relay exceeds the response time threshold (0.2s) of the cathode relay is listed in an ECU switched-on storage battery voltage abnormity knowledge base.
In the above technical solution, the ECU power-on and power-off abnormality knowledge database further includes the following ECU power-on and power-off abnormality knowledge data:
when the setting of the VCU sleep time exceeds a VCU sleep time threshold (5s) and the lower high-voltage time of the VCU exceeds the lower high-voltage time threshold of the VCU, the lower high-voltage of the VCU is abnormal;
when the MCU sleep time exceeds the MCU sleep time threshold (5s) and the high-voltage time under the MCU exceeds the high-voltage time threshold under the MCU, the high voltage under the VCU is abnormal;
when the sleeping time of the OBC control unit exceeds the sleeping time threshold (5s) of the OBC control unit and the low-voltage time of the OBC control unit exceeds the low-voltage time threshold of the OBC control unit, the low-voltage of the OBC control unit is abnormal;
when the sleep time of the DC/DC control unit exceeds a sleep time threshold (5s) of the DC/DC control unit and the high-voltage time under the DC/DC control unit exceeds a high-voltage time threshold under the DC/DC control unit, the high voltage under the DC/DC control unit is abnormal;
when the setting of the BMS control unit sleep time exceeds a BMS control unit sleep time threshold (5s) and the lower high voltage time of the BMS control unit exceeds a lower high voltage time threshold (5s) of the BMS control unit, the lower high voltage of the ECU is abnormal;
and when the EPS control unit sleep time setting exceeds an EPS control unit sleep time threshold (5s) and the EPS lower high-voltage time exceeds the EPS lower high-voltage time threshold (5s), the EPS lower high-voltage is abnormal.
In the above technical solution, the specific method for the ECU power-on and power-off timing sequence monitoring module 3 to monitor the ECU power-on and power-off timing sequence change in real time from the enterprise data monitoring platform or other data monitoring platforms based on the internet of vehicles is that the ECU power-on and power-off timing sequence monitoring module 3 acquires the power-on and power-off timing sequence change condition of each ECU in real time from the enterprise data monitoring platform through the internet of vehicles, and converts the acquired data into the data type recognizable by Matlab.
In the technical scheme, a GUI visual interface is designed through Matlab, power-on and power-off time sequence data of each ECU are accessed, the power-on and power-off time sequence change situation of each ECU is dynamically displayed, as shown in FIG. 3 (each ECU changes along with the key gear state, namely the change of the time sequence of the upper point and the lower point), an editable text box is added on the other side of a GUI image, a designer can add correction data in the text box, update of the dynamic image is completed through a button, the correction data is fed back to the ECU, and software refreshing is carried out.
In the above technical solution, the specific method for the ECU power-on and power-off timing correction module 4 to correct the real-time ECU power-on and power-off timing includes:
the ECU power-on/power-off timing sequence correction module 4 acquires ECU power-on/power-off timing sequence data, converts the ECU power-on/power-off timing sequence data into a data format recognizable by Matlab (such as converting into an m file), guides the ECU power-on/power-off timing sequence data recognizable by Matlab into a power-on/power-off abnormality diagnosis model established by using MATLAB C language through a Matlab GUI (Graphical User Interface) data Interface, performs power-on/power-off timing sequence diagnosis by using the ECU power-on/power-off abnormality knowledge database after the power-on/power-off abnormality diagnosis model receives the data, directly displays the power-on/power-off timing sequence diagram of the ECU when the electrical power-on/power-off timing sequence of the ECU is normal, displays the power-on/power-off timing sequence diagram of the ECU when the electrical power-on/power-off timing sequence is abnormal, reports an error when the electrical power-on/power-off timing sequence is abnormal, determines an ECU power-on/power-off timing sequence correction coefficient according to, and correcting the power-on and power-off time sequence of the ECU by using the power-on and power-off time sequence correction coefficient of the ECU, re-running the ECU program until all the ECUs are powered on and powered off normally, importing all corrected ECU time sequence data into the ECUs to update ECU control software, and re-drawing a complete ECU power-on and power-off time sequence diagram.
A new energy automobile ECU power-on and power-off abnormity diagnosis and correction method comprises the following steps:
step 1: the principle base establishing module 1 establishes an ECU power-on and power-off time sequence change principle database;
step 2: the knowledge base establishing module 2 establishes an ECU power-on and power-off abnormal knowledge database;
and step 3: the ECU power-on and power-off time sequence monitoring module 3 monitors the ECU power-on and power-off time sequence change in real time based on the Internet of vehicles;
and 4, step 4: the ECU power-on and power-off timing sequence correction module 4 diagnoses the real-time ECU power-on and power-off timing sequence according to the ECU power-on and power-off abnormal knowledge data in the ECU power-on and power-off abnormal knowledge database, and corrects the power-on and power-off timing sequence according to the ECU power-on and power-off timing sequence change principle data in the ECU power-on and power-off timing sequence change principle database.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. The utility model provides a new energy automobile ECU power-on and power-off abnormity diagnosis and correction system which characterized in that: the device comprises a principle library establishing module (1), a knowledge library establishing module (2), an ECU power-on and power-off time sequence monitoring module (3) and an ECU power-on and power-off time sequence correcting module (4), and is characterized in that: the principle library establishing module (1) is used for establishing an ECU power-on and power-off time sequence change principle database; the knowledge base establishing module (2) is used for establishing an ECU power-on and power-off abnormal knowledge database; the ECU power-on and power-off time sequence monitoring module (3) is used for monitoring the ECU power-on and power-off time sequence change in real time based on the Internet of vehicles; and the ECU power-on and power-off timing sequence correction module (4) is used for carrying out power-on and power-off timing sequence diagnosis on the real-time ECU power-on and power-off timing sequence according to the ECU power-on and power-off abnormal knowledge database and carrying out power-on and power-off timing sequence correction on the database according to the ECU power-on and power-off timing sequence change principle.
2. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1, characterized in that: the ECU up-down power sequence change principle of the principle base establishing module (1) comprises the following steps:
principle 1: when the key gear is ACC/ON, triggering the ECU to wake up, and when the key gear is OFF/ACC, triggering the ECU to sleep;
principle 2: the gear triggering is a necessary condition for the time sequence change of each ECU, and before the time sequence change of each ECU, power-on self-detection is required, ECU state information communication with other ECUs is required, the ECU is connected with the voltage of a storage battery for permission judgment, and the ECU is connected with an on-off control relay to be in a closed state;
principle 3: when each ECU is connected with the voltage of the storage battery, after a wake-up instruction is received, the change of the time sequence is generated after waiting for a preset time A, wherein the waiting for the preset time A comprises power-on self-detection time, ECU state information communication time with other ECUs, ECU on-off control relay action time and ECU connected storage battery voltage permission judgment time;
principle 4: when each ECU cuts off the voltage of the storage battery, after a sleep command is received, the ECU power-on and power-off time sequence changes after waiting for a preset time B, and the waiting time B is the sleep time.
3. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1, characterized in that: the ECU power-on and power-off abnormity knowledge database comprises the following ECU power-on and power-off abnormity knowledge data:
if the communication interruption time of the MCU and the VCU exceeds the communication time of the MCU and the VCU, the VCU is abnormal in voltage of the storage battery when the MCU fails to pass the self-checking or the self-checking time setting of the MCU exceeds the self-checking time threshold of the MCU or the communication time setting of the MCU and the VCU is less than the communication time threshold of the MCU and the VCU;
when the self-checking of the OBC control unit is not passed or the self-checking time setting of the OBC control unit exceeds the self-checking time threshold of the OBC control unit or the communication time setting of the OBC control unit and the VCU is less than the communication time threshold of the OBC control unit and the VCU, the VCU cannot receive the communication signal of the OBC control unit, and if the communication interruption time of the VCU and the OBC control unit exceeds the communication time of the OBC control unit and the VCU, the VCU is abnormal in voltage when being switched on;
when the self-checking of the DC/DC control unit is not passed or the self-checking time setting of the DC/DC control unit exceeds the self-checking time threshold of the DC/DC control unit or the communication time setting of the DC/DC control unit and the VCU is less than the communication time threshold of the DC/DC control unit and the VCU, the VCU cannot receive the communication signal of the DC/DC control unit, and if the communication interruption time of the VCU and the DC/DC control unit exceeds the communication time of the DC/DC control unit and the VCU, the VCU has abnormal voltage of the storage battery.
4. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1 or 3, characterized in that: the ECU power-on and power-off abnormity knowledge database also comprises the following ECU power-on and power-off abnormity knowledge data:
when the BMS control unit fails to perform self-checking or the BMS control unit self-checking time setting exceeds the BMS control unit self-checking time threshold or the BMS control unit and VCU communication time setting is less than the BMS control unit and VCU communication time threshold, the VCU cannot receive the communication signal of the BMS control unit, and if the communication interruption time of the VCU and the BMS control unit exceeds the BMS control unit and VCU communication time, the VCU has abnormal voltage when the storage battery is switched on;
when the EPS control unit fails to pass the self-checking, or the self-checking time setting of the EPS control unit exceeds the self-checking time threshold of the EPS control unit, or the communication time setting of the EPS control unit and the VCU is less than the communication time threshold of the EPS control unit and the VCU, the VCU cannot receive the communication signal of the EPS control unit, and if the communication interruption time of the VCU and the EPS control unit exceeds the communication time of the EPS control unit and the VCU, the VCU is abnormal in the voltage of the storage battery;
when the BMS control unit self-checking is not passed or the BMS control unit self-checking time setting exceeds the BMS control unit self-checking time threshold or the BMS control unit and OBC control unit communication time setting is less than the BMS control unit and OBC control unit communication time threshold, the OBC control unit cannot receive the communication signal of the BMS control unit, and if the 0BC control unit and the BMS control unit communication interruption time exceeds the BMS control unit and OBC communication time, the OBC is abnormal in battery voltage connection.
5. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 4, wherein the system comprises: the ECU power-on and power-off abnormity knowledge database also comprises the following ECU power-on and power-off abnormity knowledge data:
when the key gear is changed from an OFF gear to an ACC gear to an OFF gear, if the ACC gear duration is less than the gear duration threshold of the ACC gear, each ECU has the abnormal condition of the voltage of the battery;
when the key gear is changed from an OFF gear to an ACC gear to an ON gear to an OFF gear, if the gear duration time of the ACC + ON gear is less than the gear duration time threshold of the ACC + ON gear, each ECU has the abnormal condition of the voltage of the battery;
when the key gear is changed from an OFF gear to an ACC gear to an ON gear to a START gear to an OFF gear, if the gear duration time of the ACC + ON + START gear is less than the gear duration time threshold of the ACC + ON + START gear, each ECU can have the abnormal condition of connecting the storage battery voltage;
when the key gear is changed from an OFF gear to an ACC gear to an ON gear to a START gear to an ON gear to an OFF gear, if the gear duration time of the ACC + ON + START gear is less than the gear duration time threshold of the ACC + ON + START gear, each ECU has an abnormal condition of the battery voltage;
when the key gear is changed from the OFF gear to the ACC gear to the ON gear to the START gear to the ON gear to the ACC gear to the OFF gear, if the gear duration of the ACC + ON + START gear is less than the gear duration threshold of the ACC + ON + START gear, each ECU may have an abnormal condition of turning ON the battery voltage.
6. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1 or 5, characterized in that: the ECU power-on and power-off abnormity knowledge database also comprises the following ECU power-on and power-off abnormity knowledge data:
the voltage abnormity of the ECU switched-on storage battery caused by the fact that the response time of the pre-charge ECU on-off control relay exceeds the response time threshold of the pre-charge relay, or the response time of the anode ECU on-off control relay exceeds the response time threshold of the anode relay, or the response time of the cathode ECU on-off control relay exceeds the response time threshold of the cathode relay is listed in an ECU switched-on storage battery voltage abnormity knowledge base.
7. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1 or 5, characterized in that: the ECU power-on and power-off abnormity knowledge database also comprises the following ECU power-on and power-off abnormity knowledge data:
when the setting of the VCU sleep time exceeds the VCU sleep time threshold and the lower VCU high-voltage time exceeds the lower VCU high-voltage time threshold, the lower VCU high-voltage is abnormal;
when the MCU sleep time exceeds the MCU sleep time threshold and the high-voltage time under the MCU exceeds the MCU high-voltage time threshold, the high-voltage abnormality under the VCU can be caused;
when the sleeping time of the OBC control unit exceeds the sleeping time threshold of the OBC control unit and the low-voltage time of the OBC control unit exceeds the low-voltage time threshold of the OBC control unit, the low-voltage of the OBC control unit is abnormal;
when the sleep time setting of the DC/DC control unit exceeds the sleep time threshold of the DC/DC control unit and the high-voltage time under the DC/DC control unit exceeds the high-voltage time threshold under the DC/DC control unit, the high-voltage under the DC/DC control unit is abnormal;
when the setting of the BMS control unit sleep time exceeds a BMS control unit sleep time threshold value and the lower high-voltage time of the BMS control unit exceeds the lower high-voltage time threshold value of the BMS control unit, the lower high-voltage of the ECU is abnormal;
and when the setting of the EPS control unit dormancy time exceeds the EPS control unit dormancy time threshold value and the EPS lower high-voltage time exceeds the EPS lower high-voltage time threshold value, the EPS lower high-voltage is abnormal.
8. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1, characterized in that: the specific method for monitoring the power-on and power-off time sequence change of the ECU by the ECU power-on and power-off time sequence monitoring module (3) based on the Internet of vehicles is that the ECU power-on and power-off time sequence monitoring module (3) acquires the power-on and power-off time sequence change conditions of each ECU from an enterprise data monitoring platform in real time through the Internet of vehicles, and converts the acquired data into data types recognizable to Matlab.
9. The system for diagnosing and correcting the power-on and power-off abnormality of the ECU of the new energy vehicle according to claim 1, characterized in that: the specific method for correcting the real-time ECU power-on and power-off time sequence by the ECU power-on and power-off time sequence correction module (4) is as follows:
the ECU power-on and power-off timing sequence correction module (4) acquires the ECU power-on and power-off timing sequence data, converts the ECU power-on and power-off timing sequence data into a data format recognizable by matlab, and the ECU power-on and power-off time sequence data which can be identified by matlab is led into a power-on and power-off abnormity diagnosis model which is established by utilizing an ECU power-on and power-off abnormity knowledge database, when the power-on and power-off abnormity diagnosis model receives the data, the power-on and power-off abnormity knowledge database of the ECU is utilized to diagnose the power-on and power-off time sequence, when the power-on and power-off time sequence of the ECU is normal, the power-on and power-off time sequence diagram of the ECU is directly displayed, if the power-on and power-off time sequence of the ECU is abnormal, determining an ECU power-on and power-off timing correction coefficient according to the content of the abnormal error report by combining an ECU power-on and power-off timing change principle and a preset timing correction coefficient table, and correcting the power-on and power-off time sequence of the ECU by using the power-on and power-off time sequence correction coefficient of the ECU until all the ECUs are powered on and powered off normally, and importing all corrected ECU time sequence data into the ECU to update ECU control software.
10. A new energy automobile ECU power-on and power-off abnormity diagnosis and correction method is characterized by comprising the following steps:
step 1: the principle base establishing module (1) establishes an ECU power-on and power-off time sequence change principle database;
step 2: the knowledge base establishing module (2) establishes an ECU power-on and power-off abnormal knowledge database;
and step 3: the ECU power-on and power-off time sequence monitoring module (3) monitors the ECU power-on and power-off time sequence change in real time based on the Internet of vehicles;
and 4, step 4: and the ECU power-on and power-off timing sequence correction module (4) carries out power-on and power-off timing sequence diagnosis on the real-time ECU power-on and power-off timing sequence according to the ECU power-on and power-off abnormal knowledge data in the ECU power-on and power-off abnormal knowledge database, and carries out power-on and power-off timing sequence correction according to the ECU power-on and power-off timing sequence change principle data in the ECU power-on and power-off timing sequence change principle database.
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