Vehicle power-off method, system and vehicle

Abstract

The present disclosure relates to a vehicle power-off method, system and vehicle, belonging to the field of vehicles, the method comprising: in response to a user's power-off operation on the vehicle, detecting the speed of the vehicle; when the speed of the vehicle is greater than the preset speed threshold within a first preset time, maintaining the message sending function of the vehicle's power control system and continuing to detect the vehicle's speed; after the first preset time, if it is detected that the vehicle's speed is less than or equal to the preset speed threshold, the power control system sends a relay disconnection instruction to the vehicle's battery management system, and performs a power-off operation after sending the relay disconnection instruction, wherein the relay disconnection instruction is used to disconnect the relay of the vehicle's power battery. It can ensure that the relay of the vehicle's power battery is disconnected when the vehicle is forced to be powered off during driving.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicles, and in particular, to a vehicle power-off method, system and vehicle. Background Art

[0002] Vehicles equipped with 48V-BSG (Belt-driven Starter / Generator) systems are mild hybrid vehicles with the advantages of low cost, low fuel consumption and low emissions, so they are becoming more and more popular.

[0003] However, in the related technology, when the driver performs the power-off operation of the vehicle, since the 48V-BSG system adopts indirect network management technology, indirect network management is applied to the power CAN network with high real-time requirements. The controller on the network using indirect network management generally determines the time of dormant power-off based on the hard power-off signal, and does not need to wait for the power-off command of other controllers. However, the power battery pack needs to receive the relay disconnection command from other controllers, and then disconnect the relay and power off. However, when the vehicle is in the process of driving, in order to protect the vehicle and the driver, the controller used to send the disconnection relay request will not send the disconnection relay request to the power battery, which will cause the vehicle to be unable to start after being parked for a long time. Summary of the invention

[0004] In order to solve the problems existing in the related art, the present disclosure provides a vehicle power-off method, system and vehicle.

[0005] In order to achieve the above-mentioned object, the present disclosure provides a vehicle power-off method in a first aspect, comprising:

[0006] In response to a power-off operation of the vehicle by a user, detecting a vehicle speed of the vehicle;

[0007] When the speed of the vehicle is greater than the preset speed threshold value within a first preset time period, maintaining the message sending function of the power control system of the vehicle and continuing to detect the speed of the vehicle;

[0008] After the first preset time period, if it is detected that the vehicle speed is less than or equal to the preset speed threshold, the power control system sends a relay disconnect command to the battery management system of the vehicle, and performs a power-off operation after sending the relay disconnect command, wherein the relay disconnect command is used to disconnect the relay of the power battery of the vehicle.

[0009] Optionally, in response to the user's power-off operation on the vehicle, detecting the vehicle speed comprises: the keyless starting system of the vehicle detects the current vehicle speed of the vehicle in response to the user's power-off operation on the vehicle, and reminds the user whether to continue to power off the vehicle that is traveling if the current vehicle speed of the vehicle is greater than the preset vehicle speed threshold;

[0010] The keyless starting system of the vehicle sends a KL15 OFF signal for instructing the power control system to power off in response to the user's power-off operation on the vehicle again;

[0011] In response to receiving the KL15 OFF signal, the power control system detects the vehicle speed within the first preset time period.

[0012] Optionally, the method further comprises:

[0013] The battery management system receives the relay disconnection instruction and disconnects the relay of the power battery of the vehicle according to the relay disconnection instruction;

[0014] The battery management system detects whether the relay is stuck;

[0015] If the relay is stuck, the battery management system sends a power battery system fault prompt;

[0016] If the relay is not adhered, the battery management system stops sending messages and powers off.

[0017] Optionally, the user's power-off operation on the vehicle includes the user pressing a one-button start switch of the vehicle at least three times within a second preset time period, or the user continuously pressing the one-button start switch of the vehicle within a third preset time period.

[0018] Optionally, the power control system includes a hybrid power control unit and an engine management system, and the power control system performs a power-off operation including:

[0019] The hybrid power control unit sends a power-off request to the engine management system, and stops sending messages and powers off after sending the power-off request;

[0020] After receiving the power-off request, the engine management system stops sending messages and powers off.

[0021] A second aspect of the present disclosure provides a system for powering off a vehicle, including a keyless start system, a power control system, and a battery management system;

[0022] The power control system is used to, in response to a power-off operation of the vehicle by a user, detect the speed of the vehicle, and when the speed of the vehicle is greater than the preset speed threshold for a first preset time period, maintain the message sending function of the power control system of the vehicle and continue to detect the speed of the vehicle;

[0023] After the first preset time period, if it is detected that the vehicle speed is less than or equal to the preset speed threshold, the power control system sends a relay disconnect command to the battery management system of the vehicle, and performs a power-off operation after sending the relay disconnect command, wherein the relay disconnect command is used by the battery management system to disconnect the relay of the power battery of the vehicle.

[0024] Optionally, the keyless start system is used to, in response to a power-off operation of the vehicle by the user, detect the current speed of the vehicle, and, if the current speed of the vehicle is greater than the preset speed threshold, remind the user whether to continue to power off the vehicle that is running, and in response to another power-off operation of the vehicle by the user, send a KL15 OFF signal for instructing the power control system to power off;

[0025] The power control system is used to detect the vehicle speed of the vehicle in response to a power-off operation of the vehicle by a user, and includes:

[0026] The power control system is configured to detect the vehicle speed of the vehicle within the first preset time period in response to receiving the KL15 OFF signal.

[0027] Optionally, the battery management system is used to receive the relay disconnect instruction, disconnect the relay of the vehicle's power battery according to the relay disconnect instruction, and detect whether the relay is stuck. If the relay is stuck, the battery management system sends a power battery system fault prompt; if the relay is not stuck, the battery management system stops sending messages and powers off.

[0028] Optionally, the power control system includes a hybrid power control unit and an engine management system, wherein the hybrid power control unit is used to send a power-off request to the engine management system, and stop sending messages and power off after sending the power-off request;

[0029] The engine management system is used to stop sending messages and power off after receiving the power-off request.

[0030] A third aspect of the present disclosure provides a vehicle, characterized in that the vehicle includes any one of the systems provided in the second aspect of the present disclosure.

[0031] Through the above technical solution, by detecting the current speed of the vehicle when the driver performs the power-off operation, maintaining the message sending function of the power control system while the vehicle is driving, and sending a relay disconnect command after the vehicle stops, stopping sending messages and powering off itself, it can be ensured that the vehicle can be forced to power off during driving and then power off itself after disconnecting the relay of the power battery, thereby avoiding the vehicle being unable to restart after being parked for a long time due to the relay not being disconnected.

[0032] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0034] Figure 1 The figure is a flow chart of a method for powering off a vehicle according to an exemplary embodiment.

[0035] Figure 2 is another flow chart of a vehicle power-off method according to an exemplary embodiment.

[0036] Figure 3 The invention is a block diagram of a system for powering off a vehicle according to an exemplary embodiment.

[0037] Figure 4 is another block diagram of a system for powering off a vehicle according to an exemplary embodiment.

[0038] Figure 5 A vehicle is shown according to an exemplary embodiment. DETAILED DESCRIPTION

[0039] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0040] Figure 1 is a flow chart of a vehicle power-off method shown in an exemplary embodiment. Figure 1 As shown, the method comprises the steps of:

[0041] S101: In response to a power-off operation of the vehicle by a user, detecting a speed of the vehicle.

[0042] In an optional embodiment, the vehicle speed may be acquired by the vehicle's electronic stability system and sent to the power control system.

[0043] S102: When the vehicle speed is greater than the preset vehicle speed threshold value within a first preset time period, the message sending function of the power control system of the vehicle is maintained, and the vehicle speed is continued to be detected.

[0044] The first preset time length may be, for example, two seconds. The power control system receives or sends signals by receiving and sending messages. When the message sending function is stopped, the message receiving function will also be stopped.

[0045] S103. After the first preset time period, if it is detected that the vehicle speed is less than or equal to the preset speed threshold, the power control system sends a relay disconnect command to the battery management system of the vehicle, and performs a power-off operation after sending the relay disconnect command, wherein the relay disconnect command is used to disconnect the relay of the power battery of the vehicle.

[0046] Among them, the preset vehicle speed threshold can be, for example, 2km / h, which is used to determine whether the vehicle is in the driving process. For example, when the current vehicle speed is 3km / h, it is considered that the vehicle is still driving, and when the current vehicle speed is 1.5km / h, it is considered that the vehicle has stopped.

[0047] In the disclosed embodiment, when the driver performs the power-off operation, the current speed of the vehicle is detected, the message sending function of the power control system is maintained while the vehicle is driving, and after the vehicle stops, a relay disconnect command is sent, message sending is stopped, and the power is cut off by itself. This ensures that the vehicle can be forced to power off during driving and then the relay of the power battery is disconnected before the vehicle itself is powered off, thereby preventing the vehicle from being unable to restart after being parked for a long time due to the relay not being disconnected.

[0048] In some optional embodiments, in response to the user's power-off operation on the vehicle, detecting the vehicle speed includes: the keyless starting system of the vehicle detects the current vehicle speed of the vehicle in response to the user's power-off operation on the vehicle, and reminds the user whether to continue to power off the vehicle that is traveling if the current vehicle speed of the vehicle is greater than the preset vehicle speed threshold;

[0049] The keyless starting system of the vehicle sends a KL15 OFF signal for instructing the power control system to power off in response to the user's power-off operation on the vehicle again;

[0050] In response to receiving the KL15 OFF signal, the power control system detects the vehicle speed within the first preset time period.

[0051] The keyless start system can detect the vehicle's one-button start switch to determine the user's power-off operation on the vehicle, and obtain the vehicle speed through the vehicle's electronic stability system. In an optional embodiment, after reminding the user whether to continue to power off the moving vehicle, the user's power-off operation on the vehicle is detected within a preset time, and then a KL15 OFF signal for instructing the power control system to power off is sent. The preset time can be, for example, three seconds.

[0052] By adopting this solution, when the keyless starting system detects that the user is performing a power-off operation while the vehicle is driving, it can send a prompt to remind the user whether there is any wrong operation. If the user determines that the vehicle still needs to be powered off after receiving the prompt, the KL15 OFF signal is sent to the power control system to enable the power control system to control the battery management system to disconnect the relay, thereby avoiding forced power-off of the vehicle due to user's wrong operation.

[0053] In some other optional embodiments, the method further includes:

[0054] The battery management system receives the relay disconnection instruction and disconnects the relay of the power battery of the vehicle according to the relay disconnection instruction;

[0055] The battery management system detects whether the relay is stuck;

[0056] If the relay is stuck, the battery management system sends a power battery system fault prompt;

[0057] If the relay is not adhered, the battery management system stops sending messages and powers off.

[0058] By adopting this solution, the battery management system detects whether the relay is disconnected successfully after the relay is disconnected. When the relay is determined to be faulty, the user can be promptly prompted to perform maintenance to avoid vehicle power loss due to relay failure.

[0059] Optionally, the user's power-off operation on the vehicle includes the user pressing a one-button start switch of the vehicle at least three times within a second preset time period, or the user continuously pressing the one-button start switch of the vehicle within a third preset time period.

[0060] The second preset time length may be two seconds, and the third preset time length may be five seconds. By adopting this solution, the probability of erroneous operation of the user's power-off operation during driving of the vehicle can be reduced by increasing the difficulty of the user's power-off operation.

[0061] Optionally, the power control system includes a hybrid power control unit and an engine management system, and the power control system performs a power-off operation including:

[0062] The hybrid power control unit sends a power-off request to the engine management system, and stops sending messages and powers off after sending the power-off request;

[0063] After receiving the power-off request, the engine management system stops sending messages and powers off.

[0064] By adopting this solution, the power can be cut off through the interaction between the engine management system integrated in the power control system and the hybrid power control unit, so that the engine management system will not be powered off 200ms after receiving the KL15OFF signal and fail to send a relay disconnect request.

[0065] Figure 2 is another flow chart of a vehicle power-off method according to an exemplary embodiment. Figure 2 As shown, the method comprises the steps of:

[0066] S201: The keyless start system detects that the user has pressed the one-button start switch for three seconds.

[0067] S202: The keyless starting system detects the current speed of the vehicle.

[0068] S203: The keyless starting system determines whether the vehicle speed is greater than 2 km / h.

[0069] When the vehicle speed is greater than 2 km / h, steps S204 and S205 are executed. The disclosure does not limit which steps are executed when the vehicle speed is less than 2 km / h.

[0070] S204: The keyless start system sends a prompt.

[0071] This prompt is used to remind the user that the vehicle is in driving state to avoid the owner's misoperation causing the vehicle to be forced to power off during normal driving.

[0072] S205: The keyless start system determines whether the user presses and holds the one-button start switch for three seconds again.

[0073] If it is determined that the user has pressed the one-button start switch for three seconds again, steps S206, S207 and S208 are executed. Other restrictions may be added to this step, such as whether the user has pressed the one-button start switch for three seconds again within three seconds after step S204 is executed.

[0074] S206, the keyless start system sends a KL15 OFF signal to the power control system.

[0075] S207: The power control system detects the current vehicle speed.

[0076] S208: The power control system determines whether the vehicle speed is greater than 2 km / h.

[0077] When the vehicle speed is greater than 2 km / h, it is determined that the vehicle is still in motion, and step S207 is executed. When the vehicle speed is less than 2 km / h, step S209 and steps S210 and S211 are executed.

[0078] S209: The power control system sends a relay disconnection instruction to the battery management system.

[0079] S210: The power control system performs a power-off operation.

[0080] S211, the battery management system disconnects the relay of the power battery.

[0081] S212: The battery management system detects whether the relay of the power battery is stuck.

[0082] When it is detected that the relay of the power battery is stuck, step S213 is executed, and when it is detected that the relay of the power battery is not stuck, step S214 is executed.

[0083] S213. The battery management system sends a power battery system fault prompt.

[0084] S214: The battery management system stops sending messages and powers off.

[0085] In the disclosed embodiment, when the driver performs the power-off operation, the current speed of the vehicle is detected, the message sending function of the power control system is maintained while the vehicle is driving, and after the vehicle stops, a relay disconnect command is sent, message sending is stopped, and the power is cut off by itself. This ensures that the vehicle can be forced to power off during driving and then the relay of the power battery is disconnected before the vehicle itself is powered off, thereby preventing the vehicle from being unable to restart after being parked for a long time due to the relay not being disconnected.

[0086] Figure 3 is a block diagram of a system 30 for powering off a vehicle according to an exemplary embodiment. Figure 3 As shown, the system 30 for powering off a vehicle includes a power control system 31 and a battery management system 32;

[0087] The power control system 31 is used to detect the speed of the vehicle in response to a power-off operation of the vehicle by the user, and when the speed of the vehicle is greater than the preset speed threshold within a first preset time period, maintain the message sending function of the power control system 31 of the vehicle and continue to detect the speed of the vehicle;

[0088] After the first preset time period, if it is detected that the vehicle speed is less than or equal to the preset speed threshold, the power control system 31 sends a relay disconnect command to the battery management system 32 of the vehicle, and performs a power-off operation after sending the relay disconnect command, wherein the relay disconnect command is used by the battery management system 32 to disconnect the relay of the power battery of the vehicle.

[0089] Optionally, the system 30 for powering off a vehicle further includes: Figure 4 The keyless starting system 41 shown is used for, in response to a power-off operation of the vehicle by the user, detecting the current speed of the vehicle, and reminding the user whether to continue to power off the vehicle while it is running when the current speed of the vehicle is greater than the preset speed threshold, and in response to another power-off operation of the vehicle by the user, sending a KL15 OFF signal for instructing the power control system 31 to power off;

[0090] The power control system 31 is used to detect the vehicle speed in response to a power-off operation of the vehicle by a user, including:

[0091] The power control system 31 is configured to detect the vehicle speed of the vehicle within the first preset time period in response to receiving the KL15 OFF signal.

[0092] Optionally, the battery management system 32 is used to receive the relay disconnection instruction, disconnect the relay of the vehicle's power battery according to the relay disconnection instruction, and detect whether the relay is stuck. If the relay is stuck, the battery management system 32 sends a power battery system fault prompt. If the relay is not stuck, the battery management system 32 stops sending messages and powers off.

[0093] Optionally, the power control system 31 includes: Figure 4 The hybrid power control unit 42 and the engine management system 43 shown, the hybrid power control unit 42 is used to send a power-off request to the engine management system 43, and stop sending messages and power off after sending the power-off request;

[0094] The engine management system 43 is used to stop sending messages and power off after receiving the power-off request.

[0095] By detecting the vehicle's current speed when the driver performs the power-off operation, maintaining the message sending function of the power control system while the vehicle is driving, and sending a relay disconnect command after the vehicle stops, stopping sending messages and powering off itself, it can ensure that the vehicle can be forced to power off during driving and then power off itself after disconnecting the power battery relay, thereby avoiding the vehicle being unable to restart after a long period of parking due to the relay not being disconnected.

[0096] Figure 5 A vehicle 50 is shown according to an exemplary embodiment, such as Figure 5 As shown, the vehicle 50 includes the above-mentioned system 30 for vehicle power-off. The system 30 for vehicle power-off is used to execute the above-mentioned vehicle power-off method. Those skilled in the art should know that in a specific implementation, the hybrid vehicle also includes other components, Figure 5 Only parts related to the embodiments of the present disclosure are shown, and other necessary vehicle components are not shown one by one.

[0097] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0098] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0099] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for powering off a vehicle, characterized in that: include: In response to a power-off operation of the vehicle by a user, detecting a vehicle speed of the vehicle; When the speed of the vehicle is greater than a preset speed threshold value within a first preset time period, maintaining the message sending function of the power control system of the vehicle and continuing to detect the speed of the vehicle; After the first preset time, if it is detected that the vehicle speed is less than or equal to the preset vehicle speed threshold, the power control system sends a relay disconnection instruction to the battery management system of the vehicle, and performs a power-off operation after sending the relay disconnection instruction, wherein the relay disconnection instruction is used to disconnect the relay of the power battery of the vehicle; The detecting the vehicle speed in response to a power-off operation of the vehicle by a user includes: The keyless starting system of the vehicle detects the current speed of the vehicle in response to the power-off operation of the vehicle by the user, and reminds the user whether to continue to power off the vehicle while it is running if the current speed of the vehicle is greater than the preset speed threshold; The keyless starting system of the vehicle sends a KL15 OFF signal for instructing the power control system to power off in response to the user's power-off operation on the vehicle again; The power control system detects the vehicle speed within the first preset time period in response to receiving the KL15 OFF signal; The power-off operation of the vehicle by the user includes the user pressing a key start switch of the vehicle at least three times within a second preset time period, or the user continuously pressing the key start switch of the vehicle within a third preset time period.

2. The method according to claim 1, characterized in that The method further comprises: The battery management system receives the relay disconnection instruction and disconnects the relay of the power battery of the vehicle according to the relay disconnection instruction; The battery management system detects whether the relay is stuck; If the relay is stuck, the battery management system sends a power battery system fault prompt; If the relay is not adhered, the battery management system stops sending messages and powers off.

3. The method according to any one of claims 1 to 2, characterized in that: The power-off operation of the vehicle by the user includes the user pressing a key start switch of the vehicle at least three times within a second preset time period, or the user continuously pressing the key start switch of the vehicle within a third preset time period.

4. The method according to any one of claims 1 to 2, characterized in that The power control system includes a hybrid power control unit and an engine management system, and the power control system performs a power-off operation including: The hybrid power control unit sends a power-off request to the engine management system, and stops sending messages and powers off after sending the power-off request; After receiving the power-off request, the engine management system stops sending messages and powers off.

5. A system for powering off a vehicle, characterized in that: Including power control system and battery management system; The power control system is used to, in response to a power-off operation of the vehicle by a user, detect the speed of the vehicle, and when the speed of the vehicle is greater than a preset speed threshold for a first preset time period, maintain the message sending function of the power control system of the vehicle and continue to detect the speed of the vehicle; After the first preset time, if it is detected that the speed of the vehicle is less than or equal to the preset speed threshold, the power control system sends a relay disconnection instruction to the battery management system of the vehicle, and performs a power-off operation after sending the relay disconnection instruction, wherein the relay disconnection instruction is used by the battery management system to disconnect the relay of the power battery of the vehicle; The system for powering off a vehicle further includes a keyless start system, wherein the keyless start system is used to, in response to a power-off operation of the vehicle by a user, detect a current speed of the vehicle, and, when the current speed of the vehicle is greater than the preset speed threshold, remind the user whether to continue to power off the vehicle being driven, and, in response to another power-off operation of the vehicle by the user, send a KL15 OFF signal for instructing the power control system to power off; The power control system is used to detect the vehicle speed of the vehicle in response to a power-off operation of the vehicle by a user, and includes: The power control system is used for detecting the vehicle speed within the first preset time period in response to receiving the KL15 OFF signal; The power-off operation of the vehicle by the user includes the user pressing a key start switch of the vehicle at least three times within a second preset time period, or the user continuously pressing the key start switch of the vehicle within a third preset time period.

6. The system according to claim 5, characterized in that The battery management system is used to receive the relay disconnection instruction, disconnect the relay of the power battery of the vehicle according to the relay disconnection instruction, and detect whether the relay is stuck. If the relay is stuck, the battery management system sends a power battery system fault prompt. If the relay is not stuck, the battery management system stops sending messages and powers off.

7. The system according to any one of claims 5-6, characterized in that: The power control system includes a hybrid power control unit and an engine management system, wherein the hybrid power control unit is used to send a power-off request to the engine management system, and stop sending messages and power off after sending the power-off request; The engine management system is used to stop sending messages and power off after receiving the power-off request.

8. A vehicle, characterized in that: The vehicle comprises the system according to any one of claims 5-7.

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