Light truck charging and flameout delay monitoring method

Abstract

The invention discloses a light truck charging and flameout delay monitoring method which comprises the following steps: detecting whether a vehicle meets a delay monitoring condition or not, and if so, enabling a VCU (Vehicle Control Unit) and / or a BMS (Battery Management System) to enter a delay monitoring mode; and after entering the delay monitoring mode, the vehicle wakes up the TBOX through the VCU and / or the BMS and sends a delay monitoring mark frame ID at the same time. According to the invention, the charging safety can be improved, the battery state can be monitored in real time, abnormal conditions can be found and handled in time, and safety accidents caused by overcharging faults can be avoided; time-delay monitoring is realized after flameout of the light truck, it is ensured that key components such as a motor, a motor controller and a battery management system have enough time to complete work such as data storage and heat dissipation, the service life of equipment is prolonged, the fault rate of the equipment is reduced, data loss and system faults caused by sudden power failure can be avoided, and the safety of the system is improved. And the overall stability and reliability of the vehicle are improved.

Description

Technical Field

[0001] This invention relates to a method for monitoring the charging and engine shutdown delay of light trucks, belonging to the field of electric vehicle monitoring technology. Background Technology

[0002] After the electric light truck is turned off and charging is complete, all controllers on the vehicle are powered down and enter sleep mode, without real-time monitoring of the battery cell voltage and temperature. Especially after charging, the internal chemical reactions of the battery do not completely cease; minor electrochemical reactions continue, keeping the battery in a relatively active state. This can cause a slight increase in battery temperature. If the temperature becomes too high, thermal runaway or other abnormalities may occur. If an abnormality occurs in the battery at this time, the controllers on the vehicle are in sleep mode and cannot promptly upload the abnormality to the platform. It will only be detected when the battery emits smoke or open flames, leading to irreparable damage. Regarding engine shutdown, after the vehicle is parked and the engine is turned off, some controllers, such as the battery management system and motor controller, may still need time to complete data saving and heat dissipation. Traditional engine shutdown sleep control methods typically put the vehicle into sleep mode a few seconds after the key is turned OFF, which may lead to data loss, system malfunctions, and shortened equipment lifespan. For example, after a long period of driving, the temperature of components such as the motor, motor controller and power battery of a pure electric light truck is high. If the power is cut off and all systems are powered off at the same time, the data storage and cooling actuators will lose control, affecting the true state of each system when it is started again. In severe cases, it may even pose a safety hazard to the power battery. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a method for monitoring the charging and shutdown delay of light trucks, so as to at least solve the problems mentioned in the background art of the lack of effective monitoring of electric light trucks during charging and shutdown sleep and the inability of the system to reasonably delay shutdown when the engine is turned off, thereby improving the vehicle's safety, reliability and user experience.

[0004] The purpose of the present invention is achieved through the following technical solutions: A method for monitoring the charging and engine shutdown delay of a light truck, comprising the following steps: Step S1: Detect whether the vehicle meets the conditions for entering delayed monitoring. If it does, the VCU and / or BMS enter the delayed monitoring mode. Step S2: After entering the delay monitoring mode, the vehicle wakes up the TBOX through the VCU and / or BMS and simultaneously sends the delay monitoring flag frame ID. Step S3: During the delayed monitoring period, determine whether the vehicle has received a new control command: No, continue the timer in delayed monitoring mode until the timer ends; Yes, exit the delayed monitoring mode, wait for the instruction operation to be completed, and then re-enter step S1.

[0005] Furthermore, in step S1, the vehicle meets the conditions for entering the delay monitoring when: the vehicle is turned off (KEY_0FF) and the high voltage is disconnected; or, the vehicle has finished charging.

[0006] Furthermore, regarding the delayed monitoring conditions for vehicle shutdown, the VCU / BMS enters the delayed monitoring mode after the vehicle key signal changes from IG ON to IG OFF and the battery voltage drops. If there is an intelligent charging function, it will not enter the delayed sleep mode after the charging is completed.

[0007] Furthermore, regarding the delay monitoring conditions for vehicle charging, the VCU / BMS will enter the delay monitoring mode after the high voltage is disconnected when any of the following conditions are met: 1) The BMS sends a charging completion or charging termination message; 2) The fast and slow charging relays are disconnected.

[0008] Furthermore, in step S2, after entering the delay monitoring mode, the vehicle wakes up the TBOX and simultaneously sends the delay monitoring flag frame ID using any of the following methods: 1) After the VCU detects that the conditions for entering the delay monitoring are met, the VCU wakes up the TBOX and BMS through "hard-wire wake-up".

[0009] 2) After the BMS detects that the conditions for entering the delay monitoring are met, the TBOX is woken up by the "hard-wire wake-up" method.

[0010] Furthermore, after the vehicle is turned off (IG_0FF), the VCU / BMS starts a self-timer for TBD minutes; or, after charging is completed, the VCU / BMS starts a self-timer for TBD minutes. During the countdown, the BMS monitors the motor, motor controller, battery management system, and any other key components in real time, and continuously sends monitoring information to the TBOX, which then uploads it to the platform.

[0011] Furthermore, the TBD is 20-120 minutes.

[0012] Furthermore, in step S3, for the delayed monitoring mode that satisfies the vehicle shutdown condition, during the TBD minute continuous monitoring period: a) If the vehicle is READY again during the delayed monitoring period, the VCU / BMS will restart the TBD countdown in minutes; If the key is only turned to the ACC or ON position during the delay monitoring period, the TBD minute countdown will not be interrupted until the TBD minute countdown ends.

[0013] b) If charging occurs during the TBD minutes of the delay monitoring after the engine is turned off, the delay monitoring will be performed according to the TBD minutes after the charging is completed. Furthermore, regarding the delayed monitoring satisfaction mode after vehicle charging is completed, during continuous monitoring within TBD minutes: a) During the delayed monitoring period, the vehicle is restarted and is not in the OFF position. When the key is turned to the ACC or ON position, the vehicle does not exit the delayed monitoring mode. The delayed monitoring flag frame is not set and the countdown is not interrupted. After the countdown reaches TBD minutes, the vehicle exits the delayed monitoring and sends the monitoring mode flag frame ID to be set. b) If the vehicle is plugged in for charging during the delayed monitoring period, the countdown to exit the delayed monitoring mode ends, and the delayed monitoring flag frame ID is sent at the same time. After charging ends, the vehicle re-enters the TBD minute delayed monitoring and sends the delayed monitoring flag frame ID at the same time.

[0014] Furthermore, during the delayed monitoring period after charging is completed, if the battery temperature is too high, the BMS requests cooling from the TMS thermal management system to cool the battery temperature to the target temperature.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention realizes delayed monitoring after the light truck is charged, which improves charging safety. After the charging is completed, the battery status can be monitored in real time, and abnormal situations can be detected and dealt with in a timely manner to avoid safety accidents caused by overcharging.

[0016] (2) This invention enables delayed monitoring after the light truck is turned off, ensuring that key components such as the motor, motor controller, and battery management system have enough time to complete data storage and heat dissipation after the engine is turned off, thus extending the service life of the equipment, reducing the equipment failure rate, and avoiding data loss and system failure caused by sudden power outages. It also ensures that each system can operate normally when the vehicle is started next time, improving the overall stability and reliability of the vehicle. Users do not need to worry about abnormal situations of the vehicle system after the engine is turned off, which increases users' trust in new energy vehicles and their satisfaction with the use, and enhances the user experience.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings, wherein: Figure 1This is a schematic diagram of a light truck charging delay monitoring process provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a light truck engine shutdown delay monitoring process provided in an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-2 As shown, the first embodiment of the present invention provides a method for monitoring the charging and engine shutdown delay of a light truck, which includes the following steps: Step S1: Detect whether the vehicle meets the conditions for entering delayed monitoring. If it does, the VCU and / or BMS enter the delayed monitoring mode. Step S2: After entering the delay monitoring mode, the vehicle wakes up the TBOX through the VCU and / or BMS and simultaneously sends the delay monitoring flag frame ID. Step S3: During the delayed monitoring period, determine whether the vehicle has received a new control command: No, continue the timer in delayed monitoring mode until the timer ends; Yes, exit the delayed monitoring mode, wait for the instruction operation to be completed, and then re-enter step S1.

[0021] In step S1, the vehicle meets the conditions for entering the delay monitoring when: the vehicle is turned off (KEY_0FF) and the high voltage is disconnected; or, the vehicle has finished charging.

[0022] Specifically, for the delayed monitoring conditions when the vehicle is turned off, the VCU / BMS enters the delayed monitoring mode after the vehicle key signal changes from IG ON to IG OFF and the battery voltage drops. If there is an intelligent charging function, it will not enter the delayed sleep mode after the charging is completed.

[0023] Regarding the delay monitoring conditions for vehicle charging, the VCU / BMS will enter the delay monitoring mode after the high voltage is disconnected when any of the following conditions are met: 1) The BMS sends a charging completion or charging termination message; 2) The fast and slow charging relays are disconnected.

[0024] In step S2, the VCU or BMS needs to continuously send the delay monitoring flag frame ID. The VCU / BMS should send the delay monitoring flag frame ID simultaneously when entering the delay monitoring mode.

[0025] After entering the delayed monitoring mode, the vehicle wakes up the TBOX and simultaneously sends the delayed monitoring flag frame ID using any of the following methods: 1) After the VCU detects that the conditions for entering the delay monitoring are met, the VCU wakes up the TBOX and BMS through "hard-wire wake-up".

[0026] 2) After the BMS detects that the conditions for entering the delay monitoring are met, the TBOX is woken up by the "hard-wire wake-up" method.

[0027] When TBOX and BMS are woken up, subsystem modules such as MCU and ICM are also woken up, and the control power consumption of the woken modules is fed back.

[0028] After the vehicle is turned off (IG_0FF), the VCU / BMS starts a self-timer for TBD (Total Countdown Time) in minutes; alternatively, after charging is complete, the VCU / BMS starts a self-timer for TBD in minutes. During the countdown, the BMS monitors key components such as the motor, motor controller, and battery management system in real time and continuously sends monitoring information to the TBOX, which then uploads it to the platform. Preferably, the TBD is 20-120 minutes.

[0029] In step S3, for the delayed monitoring mode that satisfies the vehicle shutdown condition, during the TBD minute continuous monitoring period: a) If the vehicle is READY again during the delayed monitoring period, the VCU / BMS will restart the TBD countdown in minutes; If the key is only turned to the ACC or ON position during the delay monitoring period, the TBD minute countdown should not be interrupted until the TBD minute countdown ends.

[0030] b) If charging occurs during the TBD minutes of the delay monitoring after the engine is turned off, the delay monitoring will be performed according to the TBD minutes after the charging is completed.

[0031] For the delayed monitoring satisfaction mode after vehicle charging is completed, during the continuous monitoring period within TBD minutes: a) During the delayed monitoring period, the vehicle is restarted and is not in the OFF position. When the key is turned to the ACC or ON position, the vehicle does not exit the delayed monitoring mode. The delayed monitoring flag frame is not set and the countdown is not interrupted. After the countdown reaches TBD minutes, the vehicle exits the delayed monitoring and sends the monitoring mode flag frame ID to be set. b) If the vehicle is plugged in for charging during the delayed monitoring period, the countdown to exit the delayed monitoring mode ends, and the delayed monitoring flag frame ID is sent at the same time. After charging ends, the vehicle re-enters the TBD minute delayed monitoring and sends the delayed monitoring flag frame ID at the same time.

[0032] During the delayed monitoring period after charging is completed, if the battery temperature is too high, the BMS should request cooling from the TMS thermal management system to cool the battery to the target temperature. Battery cooling will be disabled after exiting delayed monitoring and entering sleep mode.

[0033] During the continuous delay monitoring within TBD minutes, the VCU should receive a power-on / off request, execute the power-on / off process normally, and be able to realize the functions of each target module.

[0034] After the delay monitoring mode reaches TBD minutes, the VCU / BMS message settings and flags return to their original states, exiting the delay monitoring mode. If the vehicle is turned off, each subsystem module enters a sleep state.

[0035] The delay monitoring system based on the aforementioned light truck charging and engine shutdown delay monitoring method includes a vehicle control unit (VCU), battery management system (BMS), motor controller (MCU), thermal management system (TMS), and vehicle networking system (TBOX) connected via CAN communication. When the vehicle is turned off (IG_OFF) or charging is completed, the VCU / BMS starts a countdown of TBD minutes. If the vehicle is ready again or charging ends during the countdown, the countdown restarts. During the countdown, the BMS monitors key components such as the motor, motor controller, and battery management system in real time and continuously sends monitoring information, including cell voltage, cell temperature, maximum and minimum cell voltage, maximum and minimum cell probe temperature, maximum voltage cell code, minimum voltage cell code, maximum / minimum temperature probe cell code, and maximum / minimum temperature probe subsystem code, to the TBOX. The TBOX then uploads this information to the platform, enabling timely detection and handling of anomalies to prevent safety accidents caused by overcharging.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for monitoring the charging and engine shutdown delay of a light truck, characterized in that, It includes the following steps: Step S1: Detect whether the vehicle meets the conditions for entering delayed monitoring. If it does, the VCU and / or BMS enter the delayed monitoring mode. Step S2: After entering the delay monitoring mode, the vehicle wakes up the TBOX through the VCU and / or BMS and simultaneously sends the delay monitoring flag frame ID. Step S3: During the delayed monitoring period, determine whether the vehicle has received a new control command: No, continue the timer in delayed monitoring mode until the timer ends; Yes, exit the delayed monitoring mode, wait for the instruction operation to be completed, and then re-enter step S1.

2. The method for monitoring charging and engine shutdown delay of light trucks according to claim 1, characterized in that, In step S1, the vehicle meets the conditions for entering the delay monitoring when: the vehicle is turned off (KEY_0FF) and the high voltage is disconnected; or, the vehicle has finished charging.

3. The method for monitoring the charging and engine shutdown delay of a light truck according to claim 2, characterized in that, For delayed monitoring conditions when the vehicle is turned off, the VCU / BMS enters delayed monitoring mode after the vehicle key signal changes from IG ON to IG OFF and the battery voltage drops. If there is an intelligent charging function, it will not enter delayed sleep mode after the charging is completed.

4. The method for monitoring the charging and engine shutdown delay of a light truck according to claim 2, characterized in that, Regarding the delay monitoring conditions for vehicle charging, the VCU / BMS will enter the delay monitoring mode after the high voltage is disconnected when any of the following conditions are met: 1) The BMS sends a charging completion or charging termination message; 2) The fast and slow charging relays are disconnected.

5. The method for monitoring charging and engine shutdown delay of a light truck according to claim 1, characterized in that, In step S2, after entering the delay monitoring mode, the vehicle wakes up the TBOX and simultaneously sends the delay monitoring flag frame ID using any of the following methods: 1) After the VCU detects that the conditions for entering the delay monitoring are met, the VCU wakes up the TBOX and BMS through "hard-wire wake-up"; 2) After the BMS detects that the conditions for entering the delay monitoring are met, the TBOX is woken up by the "hard-wire wake-up" method.

6. The method for monitoring charging and engine shutdown delay of a light truck according to claim 5, characterized in that, After the vehicle is turned off (IG_0FF), the VCU / BMS starts a self-timer for TBD minutes; or, after charging is completed, the VCU / BMS starts a self-timer for TBD minutes. During the countdown, the BMS monitors the motor, motor controller, battery management system and any other key components in real time, and continuously sends monitoring information to the TBOX, which then uploads it to the platform.

7. The method for monitoring charging and engine shutdown delay of a light truck according to claim 6, characterized in that, The TBD duration is 20-120 minutes.

8. The method for monitoring the charging and engine shutdown delay of a light truck according to claim 7, characterized in that, In step S3, for the delayed monitoring mode that satisfies the vehicle shutdown condition, during the TBD minute continuous monitoring period: a) If the vehicle is READY again during the delayed monitoring period, the VCU / BMS will restart the TBD countdown in minutes; If the key is only turned to the ACC or ON position during the delay monitoring period, the TBD minute countdown will not be interrupted until the TBD minute countdown ends. b) If charging occurs during the TBD minutes of the delay monitoring after the engine is turned off, the delay monitoring will be performed according to the TBD minutes after the charging is completed.

9. The method for monitoring charging and engine shutdown delay of a light truck according to claim 8, characterized in that, For the delayed monitoring satisfaction mode after vehicle charging is completed, during the continuous monitoring period within TBD minutes: a) During the delayed monitoring period, the vehicle is restarted and is not in the OFF position. When the key is turned to the ACC or ON position, the vehicle does not exit the delayed monitoring mode. The delayed monitoring flag frame is not set and the countdown is not interrupted. After the countdown reaches TBD minutes, the vehicle exits the delayed monitoring and sends the monitoring mode flag frame ID to be set. b) If the vehicle is plugged in for charging during the delayed monitoring period, the countdown to exit the delayed monitoring mode ends, and the delayed monitoring flag frame ID is sent at the same time. After charging ends, the vehicle re-enters the TBD minute delayed monitoring and sends the delayed monitoring flag frame ID at the same time.

10. The method for monitoring charging and engine shutdown delay of a light truck according to claim 9, characterized in that, During the delayed monitoring period after charging is completed, if the battery temperature is too high, the BMS requests cooling from the TMS thermal management system to cool the battery temperature to the target temperature.

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