Method, apparatus, device and storage medium for powering off a vehicle

Abstract

The application discloses a vehicle power-off method, device, equipment and storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: in the case that an airbag controller sends a collision signal, the vehicle collision scene is the situation of non-power-off parking or vehicle driving, the collision signal is acquired based on a vehicle controller, and a power-off instruction is sent by controlling the vehicle controller; the collision signal is acquired based on a battery management system controller, and the battery management system controller is controlled to disconnect a relay; the collision signal is acquired based on a vehicle-mounted charger, and the vehicle-mounted charger is controlled to stop charging and discharge; the power-off instruction is acquired based on a motor controller, and the voltage of a voltage bus is reduced to a reference value within a reference time by controlling the motor controller. After the vehicle collision, the vehicle controller, the battery management system controller, the vehicle-mounted charger and the motor controller of the vehicle are controlled to be powered off, so that the safety of the vehicle is ensured.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to a method, apparatus, device, and storage medium for powering off a vehicle. Background Technology

[0002] With the increasing number of vehicles on the road, vehicle safety has become increasingly important. Electric vehicles, in particular, can suffer damage to their high-voltage systems during collisions, leading to secondary risks such as exposed high-voltage wires, high-voltage leaks, short circuits, and battery fires. Therefore, it is necessary to cut off the vehicle's power supply after a collision to ensure the safety of electric vehicles. Summary of the Invention

[0003] This application provides a method, apparatus, device, and storage medium for disconnecting power to a vehicle, which can be used to solve the problem of ensuring the safety of electric vehicles after a collision. The technical solution is as follows:

[0004] On one hand, embodiments of this application provide a method for disconnecting a vehicle's power, the method comprising:

[0005] Acquire a first detection result of the vehicle in the event of a collision, the first detection result being used to indicate whether the vehicle's airbag controller issues a collision signal;

[0006] Based on the first detection result, the airbag controller is instructed to issue the collision signal and a second detection result is obtained. The second detection result is used to indicate whether the collision scenario of the vehicle is a stopped vehicle without power off or a vehicle in motion.

[0007] Based on the second detection result indicating that the vehicle collision scenario is either the vehicle is not powered off and is parked or the vehicle is in motion, control at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller.

[0008] Based on the collision signal obtained by the airbag controller from the vehicle controller, the vehicle controller is controlled to issue a power-down command.

[0009] Based on the collision signal received by the airbag controller from the battery management system controller, the battery management system controller is controlled to disconnect the relay;

[0010] Based on the collision signal received by the airbag controller from the on-board charger, the on-board charger is controlled to stop charging and discharge.

[0011] Based on the power-down command received by the motor controller from the vehicle controller, the motor controller is controlled to reduce the voltage of the voltage bus to a reference value within a reference time period.

[0012] On the other hand, a device for disconnecting vehicle power is provided, the device comprising:

[0013] The first acquisition module is used to acquire a first detection result of the vehicle in the event of a collision. The first detection result is used to indicate whether the airbag controller of the vehicle issues a collision signal.

[0014] The second acquisition module is used to instruct the airbag controller to emit the collision signal based on the first detection result and acquire a second detection result. The second detection result is used to indicate whether the scenario in which the vehicle collides is a stopped vehicle without power off or a vehicle in motion.

[0015] The first control module is used to control at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller, based on the second detection result indicating that the collision scenario of the vehicle is either the vehicle is not powered off and parked or the vehicle is in motion.

[0016] The second control module is used to control the vehicle controller to issue a power-down command based on the collision signal obtained by the airbag controller from the vehicle controller.

[0017] The third control module is used to control the battery management system controller to disconnect the relay based on the collision signal obtained by the airbag controller from the battery management system controller.

[0018] The fourth control module is used to control the on-board charger to stop charging and discharge based on the collision signal received by the airbag controller from the on-board charger.

[0019] The fifth control module is used to control the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period based on the power-down command issued by the vehicle controller after the motor controller receives the power-down command.

[0020] On the other hand, a computer device is provided, the computer device including a processor and a memory, the memory storing at least one computer program, the at least one computer program being loaded and executed by the processor to enable the computer device to implement any of the above-described vehicle power-off methods.

[0021] On the other hand, a computer-readable storage medium is also provided, wherein at least one computer program is stored therein, the at least one computer program being loaded and executed by a processor to enable a computer to implement any of the above-described methods for powering off a vehicle.

[0022] On the other hand, a computer program product or computer program is also provided, the computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, causing the computer device to perform any of the vehicle power-off methods described above.

[0023] The technical solution provided in this application brings at least the following beneficial effects:

[0024] When a vehicle collision occurs, this application controls at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller, in cases where the vehicle is stopped without power or while the vehicle is in motion, thereby enabling the vehicle controller, battery management system controller, and on-board charger to recognize the vehicle collision.

[0025] Based on collision signals received from the vehicle controller, battery management system controller, and on-board charger, the system controls the vehicle controller to issue a power-down command, the battery management system controller to disconnect the relay, and the on-board charger to stop charging and discharge. This achieves power-off control for the vehicle controller, battery management system controller, and on-board charger in the event of a collision. If the motor controller receives a power-down command, it controls the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period. This prevents the voltage bus from becoming too high after a collision, and avoids the danger of damage to the voltage system caused by the vehicle controller, battery management system controller, and on-board charger not being powered off, thus ensuring vehicle safety. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of an implementation environment provided in an embodiment of this application;

[0028] Figure 2 This is a flowchart of a method for disconnecting power to a vehicle provided in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of a vehicle power-off device provided in an embodiment of this application;

[0030] Figure 4This is a schematic diagram of the structure of a server provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of a vehicle power-off device provided in an embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] This application provides a method for disconnecting vehicle power; please refer to [reference needed]. Figure 1 The diagram illustrates the implementation environment of the method provided in this application embodiment. This implementation environment may include: a vehicle 11 and a vehicle control system 12.

[0034] Optionally, when a collision occurs in vehicle 11, a collision signal is issued based on the airbag controller of vehicle 11, and if the collision occurs in the scenario where vehicle 11 is not powered off and is parked or while vehicle 11 is in motion, vehicle control system 12 controls at least one of vehicle controller, battery management system controller or on-board charger to acquire the collision signal issued by airbag controller.

[0035] Based on the collision signal received by the vehicle controller, the vehicle control system 12 controls the vehicle controller to issue a power-down command; based on the collision signal received by the battery management system controller, the vehicle control system 12 controls the battery management system controller to disconnect the relay; based on the collision signal received by the on-board charger, the vehicle control system 12 controls the on-board charger to stop charging and discharge. Furthermore, if the motor controller receives the power-down command from the vehicle controller, the vehicle control system 12 controls the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period.

[0036] Optionally, the vehicle control system 12 can store the power-on / off status and driving speed of the vehicle 11 to determine the scenario of a collision involving the vehicle 11.

[0037] Optionally, the vehicle 11 and the vehicle control system 12 establish a communication connection via a wired or wireless network.

[0038] Based on the above Figure 1 The implementation environment shown in this application embodiment provides a method for powering off a vehicle, and the flowchart of the method is as follows: Figure 2 As shown. Taking the application of this method to a vehicle control system as an example, the method includes steps 201-207.

[0039] In step 201, a first detection result is obtained in the event of a collision. The first detection result is used to indicate whether the vehicle's airbag controller issues a collision signal.

[0040] In one possible implementation, in the event of a vehicle collision, the vehicle control system communicates with the vehicle's airbag controller via at least one of a bus or hardwired connection to obtain information emitted by the airbag controller. If the obtained information from the airbag controller includes a collision signal, a first detection result instructs the vehicle's airbag controller to issue a collision signal; if the information from the airbag controller does not include a collision signal, the first detection result instructs the vehicle's airbag controller not to issue a collision signal.

[0041] Optionally, the hardwired communication between the vehicle control system and the airbag controller can be PWM (Pulse Width Modulation), and the bus can be CAN (Controller Area Network).

[0042] For example, in addition to acquiring information from the airbag controller, the vehicle control system can also acquire fault codes generated by the vehicle to determine whether the vehicle's airbag controller has issued a collision signal. These fault codes are generated when a sensor or actuator in the vehicle malfunctions, and are used to indicate the fault and the faulty sensor or actuator. If the fault codes generated by the vehicle include codes related to the airbag controller, the first detection result indicates that the vehicle's airbag controller should issue a collision signal.

[0043] For example, the vehicle control system can also determine whether the vehicle's airbag controller issues a collision signal based on the airbag inflation record. When a collision occurs, the airbag inflates rapidly, and the start time of inflation is recorded. If the airbag generates an inflation record during the trip, the first detection result indicates that the vehicle's airbag controller issues a collision signal; if the airbag does not generate an inflation record during the trip, the first detection result indicates that the vehicle's airbag controller does not issue a collision signal.

[0044] In one possible implementation, the vehicle control system can obtain the airbag inflation records and fault codes in the vehicle through the OBD (On-Board Diagnostics) interface, where the OBD interface is located on the vehicle.

[0045] In one possible implementation, the airbag controller is instructed to issue a collision signal based on the first detection result, thereby controlling the collision power-off switch to close. By controlling the collision power-off switch to close, the vehicle's power battery stops supplying power to the vehicle, preventing the power battery from continuously supplying power to the vehicle and causing safety issues after the high-voltage system is damaged in a collision. Optionally, the vehicle control system controls the output current of the airbag controller to drive the collision power-off switch to close. The collision power-off switch is located on the vehicle and is used to disconnect the output voltage of the power battery. When the collision power-off switch is open, the vehicle's power battery supplies power to the vehicle; when the collision power-off switch is closed, the vehicle's power battery stops supplying power to the vehicle.

[0046] This application does not limit the magnitude of the airbag controller output current. For example, the magnitude of the airbag controller output current can be determined based on experimental settings, and the magnitude of the current that can drive the collision power-off switch to close can be used as the magnitude of the airbag controller output current.

[0047] In step 202, the airbag controller is instructed to issue a collision signal based on the first detection result, and a second detection result is obtained. The second detection result is used to indicate whether the collision scenario is a vehicle that is not powered off and parked or a vehicle that is in motion.

[0048] For example, if a collision occurs while the vehicle is parked without power off or while in motion, voltage-related faults can easily occur because the vehicle's relays are not disconnected, the vehicle's voltage bus voltage is high, the on-board charger stores electrical energy, and the on-board charger is charging the vehicle's power battery. Therefore, when it is determined that the first detection result indicates that the airbag controller should issue a collision signal, a second detection result is obtained to indicate whether the scenario of the vehicle collision is a parked vehicle without power off or a vehicle in motion. This includes: obtaining the vehicle's driving speed and power-on / off status. If the vehicle's driving speed is 0 and the vehicle's power-on / off status is "power on," then the scenario of the vehicle collision is a parked vehicle without power off; if the vehicle's driving speed is not 0, then the scenario of the vehicle collision is a vehicle in motion.

[0049] Optionally, the vehicle control system can obtain the vehicle's speed from the vehicle's central control system, wherein the vehicle control system and the vehicle's main control system can communicate via CAN. Optionally, the methods for obtaining the vehicle's power-on / off status include, but are not limited to, determining the vehicle's power-on / off status through the ignition switch position information. For example, the vehicle control system obtains the ignition switch position information; when the ignition switch is in the ON (on) position, the vehicle is in a power-on state; when the ignition switch is in the OFF (off) position, the vehicle is in a power-off state.

[0050] For example, the vehicle control system obtains the ignition switch position information in ways including but not limited to detecting the ignition switch position information via CAN. When the ignition switch is detected to be in the ON position, the vehicle is in a powered-on state; when the ignition switch is detected to be in the OFF position, the vehicle is in a powered-off state.

[0051] In step 203, based on the second detection result indicating that the vehicle collision scenario is a vehicle stopped without power off or a vehicle in motion, at least one of the vehicle controller, battery management system controller, or on-board charger is controlled to acquire the collision signal emitted by the airbag controller.

[0052] In one possible implementation, after determining that the scenario in which the second detection result indicates a vehicle collision is a power-off parking or vehicle in motion, at least one of the vehicle controller, battery management system controller, or on-board charger is controlled to acquire the collision signal emitted by the airbag controller, including: controlling at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller via at least one of a bus or hardwire.

[0053] Optionally, the hardwired communication between the vehicle controller, battery management system controller, on-board charger, and airbag controller can be PWM, and the bus can be CAN.

[0054] For example, if the information emitted by the airbag controller obtained by the vehicle controller includes a collision signal, then the vehicle controller obtains the collision signal emitted by the airbag controller; if the information emitted by the airbag controller obtained by the battery management system controller includes a collision signal, then the battery management system controller obtains the collision signal emitted by the airbag controller; if the information emitted by the airbag controller obtained by the on-board charger includes a collision signal, then the on-board charger obtains the collision signal emitted by the airbag controller.

[0055] In step 204, based on the collision signal obtained by the vehicle controller from the airbag controller, the vehicle controller is controlled to issue a power-down command.

[0056] In one possible implementation, upon determining that the vehicle controller has received a collision signal from the airbag controller, the vehicle controller is controlled to issue a power-down command, including but not limited to: the vehicle control system controlling the vehicle controller to issue a power-down command to the motor control system and battery management system controller via PWM or CAN.

[0057] For example, after the vehicle controller issues a power-down command, the vehicle's power system, lighting system, and audio system are all turned off to prevent the risk of leakage, short circuit, or battery fire caused by the continued operation of the power system, lighting system, and audio system.

[0058] In step 205, based on the collision signal received by the airbag controller from the battery management system controller, the battery management system controller is controlled to disconnect the relay.

[0059] For example, the relay includes a main positive relay and a main negative relay. The main positive relay is the main relay on the positive terminal side of the power battery, and the main negative relay is the main relay on the negative terminal side of the power battery. When disconnecting the relays, if the main negative relay is disconnected first, a short circuit may easily occur because the line between the main positive relay and the main negative relay is relatively long. Therefore, the main positive relay is disconnected first, followed by the main negative relay.

[0060] Optionally, upon determining that the battery management system controller receives a collision signal from the airbag controller, the controller is instructed to disconnect the relays. This includes: first disconnecting the main positive relay, and then disconnecting the main negative relay after the main positive relay is disconnected. By disconnecting both the main positive and main negative relays, a short circuit and fire in the power battery after a collision can be prevented.

[0061] In step 206, based on the collision signal received by the on-board charger from the airbag controller, the on-board charger is controlled to stop charging and discharge.

[0062] In one possible implementation, upon determining that the on-board charger receives a collision signal from the airbag controller, the system controls the on-board charger to stop charging and discharge. This includes: the vehicle control system controlling the on-board charger to release stored electrical energy and stop charging the vehicle's power battery. By controlling the on-board charger to actively discharge and stop charging, safety issues such as fires or even explosions caused by short circuits between the positive and negative terminals of the battery during a collision are avoided.

[0063] In step 207, based on the power-down command issued by the vehicle controller obtained by the motor controller, the motor controller is controlled to reduce the voltage of the voltage bus to the reference value within the reference time period.

[0064] In one possible implementation, the voltage busbar is impacted during a vehicle collision, potentially causing insulation damage or damage to electrical equipment inside the vehicle, which could lead to hazards such as electric shock or fire. If the voltage on the high-voltage busbar is too high at this time, it may exacerbate the fault and cause injury to occupants inside the vehicle. Therefore, upon confirming that the motor controller receives a power-down command from the vehicle controller, the motor controller reduces the voltage on the voltage busbar to a reference value within a reference time period and actively discharges the vehicle's drive motor and power battery.

[0065] This application does not limit the reference duration; it can be determined based on the vehicle type and the corresponding duration limit for each type. This application also does not limit the reference voltage; for example, the reference voltage can be set to 30 volts AC or 60 volts DC based on experience.

[0066] In one possible implementation, based on the second detection result indicating that the vehicle collision scenario is not a vehicle stopped without power or in motion, a third detection result is obtained. This third detection result indicates whether the vehicle collision scenario involves charging or external discharge. Based on the third detection result indicating that the vehicle collision scenario involves charging or external discharge, the on-board charger is controlled to stop charging and discharge. The on-board charger converts the AC power from the charging station into DC power, which is then input to the vehicle's power battery.

[0067] For example, obtaining a third detection result to indicate whether the scenario in which the vehicle collision occurs is charging or external discharge includes: the vehicle control system obtaining the vehicle's charging and discharging status from the central control system via CAN, wherein the vehicle's charging and discharging status includes charging or external discharge.

[0068] In one possible implementation, after determining that the collision scenario indicated by the third detection result is charging or external discharge, controlling the on-board charger to stop charging and discharge includes: the vehicle control system controlling the on-board charger to stop charging the vehicle's power battery and release the stored electrical energy via PWM or CAN. At this time, the charging station also stops charging the vehicle. The reason for stopping charging and discharging during a collision is that gas is generated inside the power battery during charging. If a collision occurs during charging, it may damage the battery, leading to gas leakage and potentially even an explosion. Therefore, to ensure vehicle safety, charging and discharging must be stopped during a collision.

[0069] Optionally, the body controller receives a collision signal from the airbag controller; based on the collision signal received by the body controller from the airbag controller, the body controller performs at least one of the following operations: unlocking the door, illuminating the hazard warning lights, turning on the hazard lights, or displaying a warning message, to alert pedestrians or vehicles that a collision has occurred.

[0070] For example, if the information received by the body controller from the airbag controller via PWM or CAN includes a collision signal, then the body controller receives the collision signal from the airbag controller. Upon determining that the body controller has received the collision signal from the airbag controller, the vehicle control system controls the body controller to perform at least one of the following operations: unlocking the doors, illuminating the hazard warning lights, turning on the hazard flashers, or displaying a warning message, to alert pedestrians or the vehicle to a collision.

[0071] This application does not limit the prompts used for display. For example, a text prompt may be displayed saying "A vehicle collision has occurred, please take precautions" or "Pedestrians or vehicles around the vehicle that has collided should take precautions and ensure safety."

[0072] In this embodiment of the application, when a vehicle collision occurs, the airbag controller of the vehicle emits a collision signal. In cases where the vehicle collision occurs when the vehicle is stopped without power off or while the vehicle is in motion, at least one of the vehicle controller, battery management system controller, or on-board charger is controlled to acquire the collision signal emitted by the airbag controller, thereby enabling the vehicle controller, battery management system controller, and on-board charger to identify the vehicle collision.

[0073] Based on collision signals received from the vehicle controller, battery management system controller, and on-board charger, the system controls the vehicle controller to issue a power-down command, the battery management system controller to disconnect the relay, and the on-board charger to stop charging and discharge. This achieves power-off control for the vehicle controller, battery management system controller, and on-board charger in the event of a collision. If the motor controller receives a power-down command, it controls the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period. This prevents the voltage bus from becoming too high after a collision, and avoids the danger of damage to the voltage system caused by the vehicle controller, battery management system controller, and on-board charger not being powered off, thus ensuring vehicle safety.

[0074] See Figure 3 This application provides a device for cutting off power to a vehicle, and a schematic diagram of the device is shown below. Figure 3 As shown, the device includes:

[0075] The first acquisition module 301 is used to acquire the first detection result of the vehicle in the event of a collision. The first detection result is used to indicate whether the vehicle's airbag controller issues a collision signal.

[0076] The second acquisition module 302 is used to instruct the airbag controller to send a collision signal based on the first detection result and acquire the second detection result. The second detection result is used to indicate whether the scenario in which the vehicle collision occurs is when the vehicle is parked without power off or while the vehicle is in motion.

[0077] The first control module 303 is used to control at least one of the vehicle controller, battery management system controller or on-board charger to acquire the collision signal emitted by the airbag controller based on the second detection result indicating that the vehicle collision scenario is a vehicle stopped without power or a vehicle in motion.

[0078] The second control module 304 is used to control the vehicle controller to issue a power-down command based on the collision signal obtained by the vehicle controller from the airbag controller.

[0079] The third control module 305 is used to control the battery management system controller to disconnect the relay based on the collision signal sent by the airbag controller obtained by the battery management system controller.

[0080] The fourth control module 306 is used to control the on-board charger to stop charging and discharge based on the collision signal sent by the airbag controller obtained by the on-board charger;

[0081] The fifth control module 307 is used to control the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period based on the power-down command issued by the vehicle controller after the motor controller receives the power-down command.

[0082] In one possible implementation, the first acquisition module 301 is further configured to instruct the airbag controller to issue a collision signal based on the first detection result, and control the collision power-off switch to close. The collision power-off switch is located on the vehicle and is used to disconnect the output of the internal voltage of the power battery.

[0083] In one possible implementation, the second acquisition module 302 is further configured to acquire a third detection result based on the second detection result indicating that the vehicle collision scenario is not a vehicle that is not powered off and is parked or is in motion. The third detection result is used to indicate whether the vehicle collision scenario is charging or external discharge. Based on the third detection result indicating that the vehicle collision scenario is charging or external discharge, the on-board charger is controlled to stop charging and discharge.

[0084] In one possible implementation, the device further includes: a sixth control module for controlling the body controller to acquire a collision signal from the airbag controller; and a seventh control module for controlling the body controller to perform at least one of the following operations based on the collision signal received from the airbag controller: unlocking the door, illuminating the hazard warning lights, turning on the hazard lights, or displaying a warning message, in order to alert pedestrians or vehicles to a collision.

[0085] In one possible implementation, the first control module 303 is used to control at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller via at least one of the bus or hardwire.

[0086] When a vehicle collision occurs, this device, based on the collision signal emitted by the vehicle's airbag controller, and in cases where the vehicle is stopped without power or while in motion, controls at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller, thereby enabling the vehicle controller, battery management system controller, and on-board charger to identify the vehicle collision.

[0087] Based on collision signals received from the vehicle controller, battery management system controller, and on-board charger, the system controls the vehicle controller to issue a power-down command, the battery management system controller to disconnect the relay, and the on-board charger to stop charging and discharge. This achieves power-off control for the vehicle controller, battery management system controller, and on-board charger in the event of a collision. If the motor controller receives a power-down command, it controls the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period. This prevents the voltage bus from becoming too high after a collision, and avoids the danger of damage to the voltage system caused by the vehicle controller, battery management system controller, and on-board charger not being powered off, thus ensuring vehicle safety.

[0088] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process can be found in the method embodiments, which will not be repeated here.

[0089] Figure 4 This is a schematic diagram of a server structure provided in an embodiment of this application. The server can vary significantly due to differences in configuration or performance. It may include one or more processors 901 and one or more memories 902. The one or more memories 902 store at least one computer program, which is loaded and executed by the one or more processors 901 to enable the server to implement the vehicle power-off method provided in the various method embodiments described above. Of course, the server may also have wired or wireless network interfaces, a keyboard, and input / output interfaces for input and output. The server may also include other components for implementing device functions, which will not be elaborated upon here.

[0090] Figure 5 This is a schematic diagram of a device structure for powering off a vehicle, provided in an embodiment of this application. The device can be a terminal, such as an in-vehicle system or a smartphone, tablet, player, laptop, or desktop computer connected to the in-vehicle system. The terminal may also be referred to as user equipment, portable terminal, laptop terminal, desktop terminal, or other names.

[0091] Typically, a terminal includes a processor 1501 and a memory 1502.

[0092] Processor 1501 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 1501 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 1501 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 1501 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the screen. In some embodiments, processor 1501 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0093] The memory 1502 may include one or more computer-readable storage media, which may be non-transitory. The memory 1502 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 1502 is used to store at least one instruction, which is executed by the processor 1501 to cause the terminal to implement the vehicle power-off method provided in the method embodiments of this application.

[0094] In some embodiments, the terminal may also optionally include: a peripheral device interface 1503 and at least one peripheral device. The processor 1501, memory 1502, and peripheral device interface 1503 can be connected via a bus or signal line. Each peripheral device can be connected to the peripheral device interface 1503 via a bus, signal line, or circuit board. Specifically, the peripheral device includes at least one of: a radio frequency circuit 1504, a display screen 1505, a camera assembly 1506, an audio circuit 1507, and a power supply 1508.

[0095] Peripheral interface 1503 can be used to connect at least one I / O (Input / Output) related peripheral device to processor 1501 and memory 1502. In some embodiments, processor 1501, memory 1502 and peripheral interface 1503 are integrated on the same chip or circuit board; in some other embodiments, any one or two of processor 1501, memory 1502 and peripheral interface 1503 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0096] The radio frequency (RF) circuit 1504 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 1504 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 1504 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 1504 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The RF circuit 1504 can communicate with other terminals through at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: metropolitan area networks (MANs), various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks (WLANs), and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 1504 may also include circuitry related to NFC (Near Field Communication), which is not limited in this application.

[0097] Display screen 1505 is used to display a UI (User Interface). This UI may include graphics, text, icons, videos, and any combination thereof. When display screen 1505 is a touch display screen, it also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to processor 1501 for processing. In this case, display screen 1505 can also be used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, display screen 1505 can be a single screen, located on the front panel of the terminal; in other embodiments, display screen 1505 can be at least two screens, respectively located on different surfaces of the terminal or in a folded design; in other embodiments, display screen 1505 can be a flexible display screen, located on a curved or folded surface of the terminal. Furthermore, display screen 1505 can be configured as a non-rectangular, irregular shape, i.e., a non-rectangular screen. Display screen 1505 can be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode).

[0098] The camera assembly 1506 is used to acquire images or videos. Optionally, the camera assembly 1506 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is located on the front panel of the terminal, and the rear-facing camera is located on the back of the terminal. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, a wide-angle camera, and a telephoto camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, panoramic shooting by fusion of the main camera and the wide-angle camera, VR (Virtual Reality) shooting, or other fusion shooting functions. In some embodiments, the camera assembly 1506 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm-light flash and a cool-light flash, which can be used for light compensation at different color temperatures.

[0099] The audio circuit 1507 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, converting the sound waves into electrical signals that are input to the processor 1501 for processing, or input to the radio frequency circuit 1504 for voice communication. For stereo sound acquisition or noise reduction purposes, multiple microphones may be used, each positioned at a different location on the terminal. The microphone may also be an array microphone or an omnidirectional microphone. The speaker is used to convert electrical signals from the processor 1501 or the radio frequency circuit 1504 into sound waves. The speaker may be a conventional diaphragm speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can convert electrical signals not only into audible sound waves but also into inaudible sound waves for purposes such as distance measurement. In some embodiments, the audio circuit 1507 may also include a headphone jack.

[0100] Power supply 1508 is used to power the various components in the terminal. Power supply 1508 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 1508 includes a rechargeable battery, the rechargeable battery can support wired or wireless charging. The rechargeable battery can also be used to support fast charging technology.

[0101] In some embodiments, the terminal further includes one or more sensors 1509. The one or more sensors 1509 include, but are not limited to: an acceleration sensor 1510, a gyroscope sensor 1511, a pressure sensor 1512, an optical sensor 1513, and a proximity sensor 1514.

[0102] Accelerometer 1510 can detect the magnitude of acceleration along the three coordinate axes of a coordinate system established by the terminal. For example, accelerometer 1510 can be used to detect the components of gravitational acceleration along the three coordinate axes. Processor 1501 can control display screen 1505 to display the user interface in either a landscape or portrait view based on the gravitational acceleration signal acquired by accelerometer 1510. Accelerometer 1510 can also be used for games or for acquiring user motion data.

[0103] The gyroscope sensor 1511 can detect the terminal's orientation and rotation angle. The gyroscope sensor 1511 can work in conjunction with the accelerometer sensor 1510 to collect the user's 3D movements on the terminal. Based on the data collected by the gyroscope sensor 1511, the processor 1501 can perform the following functions: motion sensing (e.g., changing the UI based on the user's tilt), image stabilization during shooting, game control, and inertial navigation.

[0104] The pressure sensor 1512 can be disposed on the side bezel of the terminal and / or the lower layer of the display screen 1505. When the pressure sensor 1512 is disposed on the side bezel of the terminal, it can detect the user's grip signal on the terminal, and the processor 1501 can perform left / right hand recognition or quick operation based on the grip signal collected by the pressure sensor 1512. When the pressure sensor 1512 is disposed on the lower layer of the display screen 1505, the processor 1501 can control the operable controls on the UI interface based on the user's pressure operation on the display screen 1505. The operable controls include at least one of button controls, scroll bar controls, icon controls, and menu controls.

[0105] Optical sensor 1513 is used to collect ambient light intensity. In one embodiment, processor 1501 can control the display brightness of display screen 1505 based on the ambient light intensity collected by optical sensor 1513. Specifically, when the ambient light intensity is high, the display brightness of display screen 1505 is increased; when the ambient light intensity is low, the display brightness of display screen 1505 is decreased. In another embodiment, processor 1501 can also dynamically adjust the shooting parameters of camera assembly 1506 based on the ambient light intensity collected by optical sensor 1513.

[0106] The proximity sensor 1514, also known as a distance sensor, is typically installed on the front panel of the terminal. The proximity sensor 1514 is used to detect the distance between the user and the front of the terminal. In one embodiment, when the proximity sensor 1514 detects that the distance between the user and the front of the terminal is gradually decreasing, the processor 1501 controls the display screen 1505 to switch from a screen-on state to a screen-off state; when the proximity sensor 1514 detects that the distance between the user and the front of the terminal is gradually increasing, the processor 1501 controls the display screen 1505 to switch from a screen-off state to a screen-on state.

[0107] Those skilled in the art will understand that Figure 5 The structure shown does not constitute a limitation on the terminal and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0108] In an exemplary embodiment, a computer device is also provided, comprising a processor and a memory storing at least one computer program. The at least one computer program is loaded and executed by one or more processors to enable the computer device to implement any of the aforementioned methods for powering off a vehicle.

[0109] In an exemplary embodiment, a computer-readable storage medium is also provided, which stores at least one computer program that is loaded and executed by a processor of a computer device to enable the computer to implement any of the above-described methods for powering off a vehicle.

[0110] In one possible implementation, the aforementioned computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device, etc.

[0111] In an exemplary embodiment, a computer program product or computer program is also provided, the computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and executes the computer instructions, causing the computer device to perform any of the above-described methods for de-energizing a vehicle.

[0112] It should be noted that all information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in this application are authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the vehicle speed and the vehicle's power-on / off status involved in this application were obtained with full authorization.

[0113] It should be understood that "multiple" as used in this article refers to two or more. "And / or" 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. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0114] It should be noted that the terms "first," "second," etc. (if applicable) in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0115] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A method for disconnecting power to a vehicle, characterized in that, The method includes: Obtain the first detection results of the vehicle in the event of a collision; Based on the first detection result, the airbag controller is instructed to send a collision signal, obtain the second detection result, and control the collision power-off switch to close. The collision power-off switch is located on the vehicle and is used to disconnect the output of the internal voltage of the power battery. Based on the second detection result indicating that the vehicle collision occurred when the vehicle was stopped without power or while the vehicle was in motion, control at least one of the vehicle controller, battery management system controller or on-board charger to acquire the collision signal; Based on the collision signal obtained by the vehicle controller, the vehicle controller is controlled to issue a power-down command; Based on the collision signal obtained by the battery management system controller, the battery management system controller is controlled to disconnect the relay; Based on the collision signal obtained by the on-board charger, the on-board charger is controlled to stop charging and discharge. Based on the power-down command obtained by the motor controller, the motor controller is controlled to reduce the voltage of the voltage bus to a reference value within a reference time period; Based on the second detection result indicating that the scenario in which the vehicle collided was not the case of the vehicle being parked without power or while it was in motion, a third detection result is obtained; Based on the third detection result indicating that the collision scenario of the vehicle is either charging or external discharge, the on-board charger is controlled to stop charging and discharge.

2. The method according to claim 1, characterized in that, The method further includes: The vehicle body controller acquires the collision signal emitted by the airbag controller; Based on the collision signal received by the airbag controller from the body controller, the body controller is controlled to perform at least one of the following operations: unlocking the door and displaying a prompt message, in order to alert pedestrians or vehicles that a collision has occurred.

3. The method according to claim 1, characterized in that, The method of controlling at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal emitted by the airbag controller includes: The system controls at least one of the vehicle controller, the battery management system controller, or the on-board charger to acquire the collision signal emitted by the airbag controller via at least one of a bus or hardwired connection.

4. A device for cutting off power to a vehicle, characterized in that, The device includes: The first acquisition module is used to acquire the first detection result of the vehicle in the event of a collision; The second acquisition module is used to instruct the airbag controller to send a collision signal based on the first detection result, acquire the second detection result, and control the collision power-off switch to close. The collision power-off switch is located on the vehicle and is used to disconnect the output of the internal voltage of the power battery. The first control module is used to control at least one of the vehicle controller, battery management system controller, or on-board charger to acquire the collision signal based on the second detection result indicating that the collision scenario of the vehicle is either a vehicle that is not powered off and parked or the vehicle is in motion. The second control module is used to control the vehicle controller to issue a power-down command based on the collision signal obtained by the vehicle controller; The third control module is used to control the battery management system controller to disconnect the relay based on the collision signal obtained by the battery management system controller. The fourth control module is used to control the on-board charger to stop charging and discharge based on the collision signal obtained by the on-board charger; The fifth control module is used to control the motor controller to reduce the voltage of the voltage bus to a reference value within a reference time period based on the power-down command obtained from the motor controller. The second acquisition module is further configured to acquire a third detection result based on the second detection result indicating that the scenario in which the vehicle collides is not the case of the vehicle being parked without power or while it is in motion; and to control the on-board charger to stop charging and discharge based on the third detection result indicating that the scenario in which the vehicle collides is the case of charging or external discharge.

5. A computer device, characterized in that, The computer device includes a processor and a memory, the memory storing at least one computer program, which is loaded and executed by the processor to enable the computer device to implement the vehicle power-off method as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program, which is loaded and executed by a processor to enable the computer to implement the vehicle power-off method as described in any one of claims 1 to 3.

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