A new energy commercial vehicle intelligent power-off control system and method

Abstract

The application discloses a new energy commercial vehicle intelligent power-off control system and method, and belongs to the field of new energy commercial vehicles. The system comprises a 24V storage battery, a handle switch, an intelligent power-off control unit, an electromagnetic power switch, a door controller, a vehicle controller, an EBS controller, an RCM, a hand brake sensor, a combination instrument and a cab rollover alarm switch. The application collects the vehicle speed, the hand brake, the door lock signal and the 20-minute timeout automatic power-off logic through the CAN bus, effectively solves the power loss problem of long-time parking, collects the vehicle acceleration information, the speed drop, the impact pulse duration and the cab rollover signal to judge the collision condition in detail, thereby performing differentiated intelligent power-off control, and is more accurate and in line with the actual driving condition.

Description

Technical Field

[0001] This invention relates to the field of new energy commercial vehicles, specifically to an intelligent power-off control system and method for new energy commercial vehicles. Background Technology

[0002] Due to their commercial nature, new energy commercial vehicles have high requirements for uptime and safety. Failure to start or fire can cause significant losses. The main problems currently existing are as follows:

[0003] Parking battery drain issue: New energy commercial vehicles use many constantly powered devices, resulting in high static power consumption. Drivers often forget to turn off the battery lever after parking for a long time. The battery continues to provide constant power to various controllers, and after a long time, the battery will run out of power, causing the vehicle to fail to start and affecting operational efficiency.

[0004] Collision safety hazards: New energy commercial vehicles have a large body weight and are often under heavy load conditions. During operation, there may be situations such as human negligence or fatigue driving. If accidents such as rear-end collisions, side collisions, and crushing occur, the low-voltage power supply may not be automatically cut off. Collisions and crushing can easily cause damage to the wiring harness, short circuits between the positive and negative terminals, and cause the wiring harness to catch fire and the whole vehicle to explode, endangering the lives of the driver and passengers.

[0005] The lack of intelligent control logic means there is no intelligent judgment of parking status or collision classification. Even a minor scratch will cause the vehicle to break down if the power is cut off, while a severe collision without power cut-off poses a fire risk. It is difficult to balance safety and practicality. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent power-off control system and method for new energy commercial vehicles, which solves the problems of the vehicle starting being affected by power loss due to prolonged parking and the inability to intelligently shut off the power supply to the entire vehicle in time during a collision, leading to fires caused by the wiring harness being squeezed by the collision.

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] In a first aspect, the present invention provides an intelligent power-off control system for new energy commercial vehicles, comprising: a 24V battery, a handle switch, an intelligent power-off control unit, an electromagnetic power switch, a door controller, a vehicle controller, an EBS controller, an RCM, and a combination instrument.

[0009] The 24V battery is used for low-voltage power supply to the entire vehicle system; the intelligent power-off control unit is connected to the electromagnetic power switch and is used to control the power-off or power supply of the entire vehicle; the handle switch is connected to the electromagnetic power switch and is used for manual control of the power-off or power supply of the entire vehicle; the intelligent power-off control unit is the core control center, and is connected to the vehicle controller, EBS controller, door controller, RCM and instrument cluster via CAN bus, respectively, to collect vehicle speed signal, impact acceleration signal, door and window locking signal, parking signal and cab rollover alarm signal, and sends the control signal to the electromagnetic power switch after logical judgment.

[0010] The aforementioned intelligent power-off control system for new energy commercial vehicles also includes a handbrake sensor and a cab rollover alarm switch. The handbrake sensor is connected to the RCM and is used to determine whether the vehicle is in a parked state. The cab rollover alarm switch is connected to the instrument cluster and is used to determine whether the cab rolls over when the vehicle is involved in a collision.

[0011] In a second aspect, the present invention provides a method for intelligent power-off control of new energy commercial vehicles applied to the system described in the first aspect, including intelligent power-off control for long-term parking and intelligent power-off control after a vehicle collision.

[0012] The long-term parking intelligent power-off control includes: the intelligent power-off control unit performs a logical judgment on whether the vehicle is parked based on the collected parking signal, vehicle speed signal, and door and window locking signal. If it is determined that the vehicle is not parked, the intelligent power-off control unit outputs a positive signal by default after powering on, controls the electromagnetic power switch to close, and the whole vehicle is powered normally. If it is determined that the vehicle is parked, it checks whether an unlock signal or any of the parking signal, vehicle speed signal, and door and window locking signal has changed within a preset time period. If not, it is determined to be a long-term parking situation. After powering on, the intelligent power-off control unit stops outputting a positive signal and controls the electromagnetic power switch to open, thus cutting off the power to the whole vehicle. If it is parked, the intelligent power-off control unit outputs a positive signal by default after powering on, controls the electromagnetic power switch to close, and the whole vehicle is powered normally.

[0013] The intelligent power-off control after a vehicle collision includes: the intelligent power-off control unit detects sudden changes in the vehicle speed signal and changes in lateral and longitudinal acceleration based on the vehicle speed signal from the vehicle controller and the impact acceleration signal from the EBS controller to determine whether a collision has occurred; if not, the intelligent power-off control unit outputs a positive signal by default after powering on, controlling the electromagnetic power switch to engage and supplying power to the vehicle normally; if so, the collision level is further determined, and the intelligent power-off control unit controls the vehicle to supply power normally or cut off power based on the collision level.

[0014] The aforementioned intelligent power-off control method for new energy commercial vehicles, wherein the logical judgment on whether the vehicle is stopped includes simultaneously satisfying the following conditions: vehicle speed is zero, handbrake is engaged, doors are locked, and no windows are raised or lowered.

[0015] The aforementioned intelligent power-off control method for new energy commercial vehicles includes vehicle collision levels of: Level 1 mild collision, Level 2 moderate collision, and Level 3 severe collision.

[0016] The criteria for determining a Level 1 minor collision are: impact acceleration within the minor range, vehicle speed reduction less than 10 km / h, no active braking signal and no cab rollover alarm signal. After the intelligent power-off control unit is powered on, it outputs a positive signal by default, controls the electromagnetic power switch to engage, and the whole vehicle is powered normally.

[0017] The conditions for determining a level 2 moderate collision are: impact acceleration in the moderate range, instantaneous speed drop greater than or equal to 10 km / h, no active braking signal and no cab rollover alarm signal; the intelligent power-off control unit controls the electromagnetic power switch to disconnect after a 3-second delay, and the entire vehicle is powered off.

[0018] The criteria for determining a Level 3 severe collision are: the impact acceleration is within the severe range or a cab rollover alarm signal is received. The intelligent power-off control unit immediately stops outputting positive signals, controls the electromagnetic power switch to disconnect, and cuts off power to the entire vehicle.

[0019] The aforementioned intelligent power-off control method for new energy commercial vehicles also includes unlocking all vehicle doors to ensure that drivers and passengers can quickly exit the vehicle or receive subsequent rescue before power is cut off in a level 3 collision.

[0020] The aforementioned intelligent power-off control method for new energy commercial vehicles also includes, in the event of a level 3 collision, the intelligent power-off control unit communicating with the driving recorder and the vehicle emergency call system before the vehicle loses power, sending vehicle collision information to the backend to facilitate a rapid response by backend personnel.

[0021] In the aforementioned intelligent power-off control method for new energy commercial vehicles, during the process of intelligent power-off control for long-term parking and intelligent power-off control after a vehicle collision, the driver can manually cut off the low-voltage power supply to the entire vehicle via a handle switch.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention provides an intelligent power-off control system and method for new energy commercial vehicles, which solves the problems of power depletion due to prolonged parking affecting the next vehicle start-up and the inability to intelligently shut off the power supply to the entire vehicle in time during a collision, leading to fires caused by the compression of wiring harnesses due to collisions.

[0024] This invention effectively solves the problem of battery drain during prolonged parking by collecting vehicle speed, handbrake, and door lock signals via the CAN bus, and automatically cutting off power after 20 minutes of inactivity. It also collects vehicle acceleration information, speed reduction, impact pulse duration, and cab rollover signals to make a detailed assessment of the collision situation, enabling differentiated intelligent power-off control that is more accurate and reflects actual driving conditions. Furthermore, this invention employs a dual control system of a manual handle switch and an intelligent control unit, allowing for both manual disconnection of the vehicle's low-voltage power supply and automatic power-off control in case the driver forgets to turn off the low-voltage power supply, ensuring greater safety and reliability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the framework of an intelligent power-off control system for new energy commercial vehicles according to Embodiment 1 of the present invention;

[0026] Figure 2 This is a schematic diagram of the intelligent power-off control method for new energy commercial vehicles during long-term parking, as described in Embodiment 2 of the present invention.

[0027] Figure 3 This is a schematic diagram of the intelligent power-off control method for new energy commercial vehicles in the event of a collision, as described in Embodiment 3 of the present invention. Detailed Implementation

[0028] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0029] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0030] Example 1:

[0031] like Figure 1 As shown, this embodiment provides an intelligent power-off control system for new energy commercial vehicles, including a 24V battery, a handle switch, an intelligent power-off control unit, an electromagnetic power switch, a door controller, a vehicle controller, an EBS controller, an RCM, a combination instrument, a handbrake sensor, and a cab rollover alarm signal.

[0032] The 24V battery is used for low-voltage power supply to the system. The intelligent power-off control unit is connected to the electromagnetic power switch and is used to control the power cut-off or power supply of the entire vehicle. The handle switch is connected to the electromagnetic power switch and is used for manual control of the power cut-off or power supply of the entire vehicle. The intelligent power-off control unit is the core control center and is connected to the vehicle controller, EBS controller, door controller, RCM and instrument cluster via CAN bus. It collects vehicle speed signal, impact acceleration signal, door and window locking signal, parking signal and cab rollover alarm signal. After logical judgment, it sends the control signal to the electromagnetic power switch. The handbrake sensor is connected to the RCM and is used to determine whether the vehicle is in a parking state. The cab rollover alarm switch is connected to the instrument cluster and is used to determine whether the cab rolls over in the event of a collision.

[0033] Example 2:

[0034] Based on the same inventive concept as Embodiment 1, this embodiment introduces an intelligent power-off control method for new energy commercial vehicles during long-term parking, such as... Figure 2 As shown, it includes:

[0035] The intelligent power-off control unit performs a logical judgment on whether the vehicle is parked based on the collected parking signal, vehicle speed signal, and door / window lock signal. If not, the intelligent power-off control unit outputs a positive signal by default after powering on, controlling the electromagnetic power switch to engage and supplying power to the vehicle normally. If yes, it checks whether an unlock signal or any of the parking signal, vehicle speed signal, and door / window lock signal has changed within a preset time period. If not, it is determined to be a long-term parking situation, and the intelligent power-off control unit stops outputting a positive signal after powering on, controlling the electromagnetic power switch to disengage and powering off the vehicle. If yes, the intelligent power-off control unit outputs a positive signal by default after powering on, controlling the electromagnetic power switch to engage and supplying power to the vehicle normally.

[0036] The control logic of the intelligent power-off control unit includes:

[0037] Power-on default: After the intelligent power-off control unit is powered on, it outputs a positive signal by default to control the electromagnetic power switch to close, and the whole vehicle is powered normally.

[0038] Parking determination: When the vehicle speed is 0, the handbrake is engaged, the doors are locked, and there is no window operation, the timer will start.

[0039] Timeout determination: If the vehicle speed is 0, the lock has been closed for more than 20 minutes without receiving an unlock signal, the handbrake signal has not changed, and there is no window lifting action, it is determined to be a long-term parking situation.

[0040] Action executed: If the battery handle is not manually disconnected, the intelligent power-off control unit stops outputting power, the electromagnetic power switch is turned off, and the entire vehicle is powered off. If a door unlocking or window raising / lowering action occurs during this period, the intelligent power-off control unit continues to output power to ensure the entire vehicle is powered.

[0041] Example 3:

[0042] like Figure 3 As shown in the figure, this embodiment introduces an intelligent power-off control method for new energy commercial vehicles in the event of a collision, including:

[0043] The intelligent power-off control unit detects sudden changes in vehicle speed and lateral and longitudinal acceleration by receiving vehicle speed signals from the vehicle controller and impact acceleration signals from the EBS controller to determine whether a collision has occurred. If not, the intelligent power-off control unit outputs a positive signal upon power-up, controlling the electromagnetic power switch to engage and supplying power to the vehicle normally. If a collision has occurred, the unit further determines the collision level based on the vehicle speed signal from the vehicle controller, the acceleration signal from the EBS controller, and the cab rollover alarm signal from the instrument cluster. The intelligent power-off control unit then controls the vehicle to supply power normally or cut off power based on the collision level.

[0044] In the event of a collision, the automatic power-off control unit receives vehicle speed signals from the vehicle controller and acceleration signals from the EBS controller to detect sudden changes in vehicle speed signals and changes in lateral and longitudinal acceleration to determine whether a collision has occurred. The specific judgment logic is as follows:

[0045] Level 1 minor collision, such as scrape or minor bump;

[0046] Judgment criteria: If the impact acceleration is 8g~12g and the effective duration of the impact pulse falls within the narrow pulse range of 20ms~100ms, the vehicle speed reduction is less than 10km / h, there is no active braking signal, and there is no cab rollover alarm, it is judged as a minor collision.

[0047] Output control: A continuous positive signal is output to control the electromagnetic power switch to engage, ensuring normal power supply to the vehicle.

[0048] Level 2 moderate collision, such as partial vehicle body crush or minor side impact;

[0049] Judgment criteria: impact acceleration between 12g and 15g, instantaneous speed drop greater than or equal to 10km / h, no active braking, and no cab rollover alarm;

[0050] Output control: After the instrument alerts, if there is no manual power-off, the power will be cut off after a 3-second delay.

[0051] Level 3 severe rigid impact, such as a frontal full-scale collision or a high-speed rollover impact;

[0052] Judgment criteria: Impact acceleration ≥ 15g, or receipt of a cab rollover alarm;

[0053] Output control: Immediately stop outputting a positive signal to control the electromagnetic power switch to disconnect, thus cutting off power to the entire vehicle.

[0054] Specifically, when a vehicle is traveling at low speed and scrapes against the guardrail on the side, the EBS detects an acceleration of 9g and a pulse duration of 45ms. The vehicle speed decreases slightly, and there is no active braking. The system determines it to be a level one minor collision, continuously outputs power, and the power supply remains on, allowing the vehicle to drive away normally.

[0055] When the vehicle is hit from the side, the impact acceleration is 13g, the vehicle speed drops by 10km / h instantly, and the vehicle body deviates slightly. The system determines it to be a level two moderate collision, stops outputting after a 3-second delay, and disconnects the electromagnetic power switch to ensure that the airbags, door locks, and other functions are deactivated after completion, thus improving occupant safety.

[0056] When a vehicle is involved in a high-speed rear-end collision with an acceleration of 18g, the cab rollover alarm is triggered. The system immediately determines that it is a level 3 severe collision and instantly stops outputting power. The electromagnetic power switch is immediately disconnected, cutting off power to the entire vehicle to prevent the wiring harness from being squeezed, short-circuited, and ignited.

[0057] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A smart power-off control system for new energy commercial vehicles, characterized in that, include: 24V battery, handle switch, intelligent power-off control unit, electromagnetic power switch, door controller, vehicle controller, EBS controller, RCM and instrument cluster; The 24V battery is used for low-voltage power supply to the entire vehicle system; the intelligent power-off control unit is connected to the electromagnetic power switch and is used to control the power-off or power supply of the entire vehicle; the handle switch is connected to the electromagnetic power switch and is used for manual control of the power-off or power supply of the entire vehicle; the intelligent power-off control unit is the core control center, and is connected to the vehicle controller, EBS controller, door controller, RCM and instrument cluster via CAN bus, respectively, to collect vehicle speed signal, impact acceleration signal, door and window locking signal, parking signal and cab rollover alarm signal, and sends the control signal to the electromagnetic power switch after logical judgment.

2. The intelligent power-off control system for new energy commercial vehicles according to claim 1, characterized in that, It also includes a handbrake sensor and a cab rollover alarm switch. The handbrake sensor is connected to the RCM and is used to determine whether the vehicle is in a parked state. The cab rollover alarm switch is connected to the instrument cluster and is used to determine whether the cab rolls over in the event of a collision.

3. A method for intelligent power-off control of new energy commercial vehicles applied to the system described in claim 1, characterized in that, This includes intelligent power-off control for long-term parking and intelligent power-off control after a vehicle collision; The long-term parking intelligent power-off control includes: the intelligent power-off control unit performs a logical judgment on whether the vehicle is parked based on the collected parking signal, vehicle speed signal, and door and window locking signal. If it is determined that the vehicle is not parked, the intelligent power-off control unit outputs a positive signal by default after powering on, controls the electromagnetic power switch to close, and the whole vehicle is powered normally. If it is determined that the vehicle is parked, it checks whether an unlock signal or any of the parking signal, vehicle speed signal, and door and window locking signal has changed within a preset time period. If not, it is determined to be a long-term parking situation. After powering on, the intelligent power-off control unit stops outputting a positive signal and controls the electromagnetic power switch to open, thus cutting off the power to the whole vehicle. If it is parked, the intelligent power-off control unit outputs a positive signal by default after powering on, controls the electromagnetic power switch to close, and the whole vehicle is powered normally. The intelligent power-off control after a vehicle collision includes: the intelligent power-off control unit detects sudden changes in the vehicle speed signal and changes in lateral and longitudinal acceleration based on the vehicle speed signal from the vehicle controller and the impact acceleration signal from the EBS controller to determine whether a collision has occurred; if not, the intelligent power-off control unit outputs a positive signal by default after powering on, controlling the electromagnetic power switch to engage and supplying power to the vehicle normally; if so, the collision level is further determined, and the intelligent power-off control unit controls the vehicle to supply power normally or cut off power based on the collision level.

4. The intelligent power-off control method for new energy commercial vehicles according to claim 3, characterized in that, The logical judgment on whether the vehicle is parked is based on the following conditions: the vehicle speed is zero, the handbrake is engaged, the doors are locked, and there are no window raising or lowering actions.

5. The intelligent power-off control method for new energy commercial vehicles according to claim 3, characterized in that, The vehicle collision levels include: Level 1 minor collision, Level 2 moderate collision, and Level 3 severe collision. The criteria for determining a Level 1 minor collision are: impact acceleration within the minor range, vehicle speed reduction less than 10 km / h, no active braking signal and no cab rollover alarm signal. After the intelligent power-off control unit is powered on, it outputs a positive signal by default, controls the electromagnetic power switch to engage, and the whole vehicle is powered normally. The conditions for determining a level 2 moderate collision are: impact acceleration in the moderate range, instantaneous speed drop greater than or equal to 10 km / h, no active braking signal and no cab rollover alarm signal; the intelligent power-off control unit controls the electromagnetic power switch to disconnect after a 3-second delay, and the entire vehicle is powered off. The criteria for determining a Level 3 severe collision are: the impact acceleration is within the severe range or a cab rollover alarm signal is received. The intelligent power-off control unit immediately stops outputting positive signals, controls the electromagnetic power switch to disconnect, and cuts off power to the entire vehicle.

6. The intelligent power-off control method for new energy commercial vehicles according to claim 5, characterized in that, This also includes unlocking all vehicle doors before power is cut off in a level 3 collision to ensure that drivers and passengers can quickly exit the vehicle or receive subsequent rescue.

7. The intelligent power-off control method for new energy commercial vehicles according to claim 5, characterized in that, It also includes the ability for the intelligent power-off control unit to communicate with the driving recorder and the vehicle emergency call system before the vehicle loses power in the event of a level 3 collision, sending vehicle collision information to the back-end system to facilitate a rapid response from back-end personnel.

8. The intelligent power-off control method for new energy commercial vehicles according to claim 3, characterized in that, During the process of intelligent power-off control for long-term parking and intelligent power-off control after a vehicle collision, the driver can manually cut off the low-voltage power supply to the entire vehicle via a handle switch.

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