Vehicle control methods, vehicle control systems, vehicle control devices, and vehicles

Abstract

This invention discloses a vehicle control method, a vehicle control system, a vehicle control device, and a vehicle. The method includes: acquiring vehicle collision information of a target vehicle; if the vehicle collision information meets the conditions for power-off after a collision, generating a first control strategy to generate a first fuse control command, thereby controlling the high-voltage intelligent fuse system to switch to a fuse state, thus enabling power-off of the vehicle; if the airbag control system generates the first fuse control command, acquiring the state of the high-voltage intelligent fuse system; if the state of the high-voltage intelligent fuse system is determined to be a non-disconnected state, generating a second control strategy to control the battery management system to generate a second fuse control command, thereby controlling the high-voltage intelligent fuse system to switch to a fuse state, thus enabling power-off of the vehicle. This invention solves the technical problem of excessively long power-off time after a collision in related technologies.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and more specifically, to a vehicle control method, a vehicle control system, a vehicle control device, and a vehicle. Background Technology

[0002] With the continuous application of new technologies in vehicle collision safety testing, the methods and technologies for ensuring safe power-off during testing also need to be constantly innovated. Traditional power-off methods in collision testing can no longer meet actual needs.

[0003] In vehicle collision safety power-off tests, the most common control method is to use the airbag system collision signal or overcurrent signal as a cutoff signal to control the high-voltage contactor and / or high-voltage relay to achieve safe power-off. This high-voltage power-off method has an excessively long collision power-off time and cannot clearly distinguish collision conditions, failing to meet the collision power-off time requirements in practical applications and failing to adequately differentiate between a sufficient number of different collision conditions.

[0004] There is currently no effective solution to the problem of excessively long power-off time due to collisions in existing technologies. Summary of the Invention

[0005] This invention provides a vehicle control method, a vehicle control system, a vehicle control device, and a vehicle, to at least solve the technical problem of excessively long power-off time during collisions in related technologies.

[0006] According to one aspect of the present invention, a vehicle control method is provided, the method comprising the following steps: acquiring vehicle collision information of a target vehicle, the vehicle collision information including at least collision direction and collision speed, the vehicle collision information being detected by an airbag control system; when determining that the vehicle collision information meets the collision power-off conditions, generating a first control strategy in a control strategy set, the first control strategy being used to control the airbag control system to generate a first fuse-breaking control command, the first fuse-breaking control command being used to control a high-voltage intelligent fuse system to switch to a fuse-breaking state, thereby causing the vehicle to undergo high-voltage power-off; when determining that the airbag control system has generated a first fuse-breaking control command, acquiring the state of the high-voltage intelligent fuse system, the state of the high-voltage intelligent fuse system including a fuse-breaking state and a non-disconnected state; when determining that the state of the high-voltage intelligent fuse system is a non-disconnected state, generating a second control strategy in the control strategy set, the second control strategy being used to control a battery management system to generate a second fuse-breaking control command, the second fuse-breaking control command being used to control the high-voltage intelligent fuse system to switch to a fuse-breaking state, thereby causing the vehicle to undergo high-voltage power-off.

[0007] Optionally, the collision power-off condition includes a first collision condition and a second collision condition. The first collision condition is a forward collision with a collision speed greater than a first collision speed. The second collision condition is a rearward collision with a collision speed greater than a second collision speed. When it is determined that the vehicle collision information meets the collision power-off condition, a first control strategy is generated in the control strategy set, including: generating the first control strategy when the vehicle collision information meets either the first collision condition or the second collision condition.

[0008] Optionally, the first collision speed is 50 km / h and the second collision speed is 60 km / h.

[0009] Optionally, the vehicle control method further includes: detecting state information inside the battery pack, the state information inside the battery pack including at least the air pressure inside the battery pack and the temperature inside the battery pack; determining whether the battery pack has a risk of thermal runaway based on the state information inside the battery pack; and generating a second control strategy in the control strategy set if it is determined that the battery pack has a risk of thermal runaway.

[0010] Optionally, the vehicle control method further includes: detecting the high-voltage circuit current of the power battery; and generating a second control strategy in the control strategy set if it is determined that the high-voltage circuit current meets the first current condition.

[0011] Optionally, the first current condition is: the high-voltage circuit current is greater than the first current threshold for a first preset time period, or the high-voltage circuit current is greater than the second current threshold for a second preset time period.

[0012] Optionally, the vehicle control method further includes: upon receiving a vehicle power-down command, detecting the vehicle speed, high-voltage total success rate, and high-voltage circuit current of the power battery; upon determining that the vehicle speed meets a preset vehicle speed condition, the high-voltage total success rate is zero, and the high-voltage circuit current meets a second current condition, generating a third control strategy in the control strategy set, the third control strategy being used to control the battery management system to generate a disconnect command, the disconnect command being used to disconnect the high-voltage relay; upon determining that the battery management system generates a disconnect command, detecting the high-voltage circuit current; upon determining that the high-voltage circuit current meets a third preset current condition, generating a second control strategy in the control strategy set.

[0013] Optionally, the second current condition and the third current condition are both high-voltage circuit current greater than 100A, and / or the preset vehicle speed condition is the vehicle speed less than 5km / h.

[0014] According to another aspect of the present invention, a vehicle control system is also provided, comprising: a vehicle control system; a high-voltage intelligent fuse system connected in series in the vehicle's power battery module; an airbag control system for acquiring vehicle collision information, the vehicle collision information including at least collision direction and collision speed, the airbag control system being electrically connected to the high-voltage intelligent fuse system; and a power battery management system for detecting at least power battery status information, vehicle speed information, and high-voltage total success rate information, the power battery status information including at least battery pack internal pressure, battery pack internal temperature, and high-voltage circuit current; wherein the power battery management system is electrically connected to the vehicle control system, the high-voltage intelligent fuse system, and the airbag control system.

[0015] According to another aspect of the present invention, a vehicle control device is also provided, comprising: a first acquisition module, configured to acquire vehicle collision information of a target vehicle, the vehicle collision information including at least collision direction and collision speed, the vehicle collision information being detected by an airbag control system; a first generation module, configured to generate a first control strategy in a control strategy set when it is determined that the vehicle collision information meets the collision power-off conditions, the first control strategy being configured to control the airbag control system to generate a first fuse-breaking control command, the first fuse-breaking control command being configured to control a high-voltage intelligent fuse system to switch to a fuse-breaking state, thereby causing the vehicle to undergo high-voltage power-off; a second acquisition module, configured to acquire the state of the high-voltage intelligent fuse system when it is determined that the airbag control system has generated the first fuse-breaking control command, the state of the high-voltage intelligent fuse system including a fuse-breaking state and a non-disconnected state; and a second generation module, configured to generate a second control strategy in a control strategy set when it is determined that the state of the high-voltage intelligent fuse system is a non-disconnected state, the second control strategy being configured to control a battery management system to generate a second fuse-breaking control command, the second fuse-breaking control command being configured to control the high-voltage intelligent fuse system to switch to a fuse-breaking state, thereby causing the vehicle to undergo high-voltage power-off.

[0016] According to another aspect of the present invention, a vehicle is also provided, which is controlled by the vehicle control method described above.

[0017] In this embodiment of the invention, vehicle collision information of the target vehicle is acquired. The vehicle collision information includes at least the collision direction and collision speed, and is obtained by the airbag control system. If the vehicle collision information meets the conditions for power-off upon collision, a first control strategy is generated from a set of control strategies. This first control strategy controls the airbag control system to generate a first fuse control command, which controls the high-voltage intelligent fuse system to switch to a fuse state, thereby powering off the vehicle. If the airbag control system generates the first fuse control command, the state of the high-voltage intelligent fuse system is acquired. The state of the high-voltage intelligent fuse system includes a fuse state and a non-disconnected state. If the state of the high-voltage intelligent fuse system is determined to be a non-disconnected state, a second control strategy is generated from the set of control strategies. This second control strategy controls the battery management system to generate a second fuse control command, which controls the high-voltage intelligent fuse system to switch to a fuse state, thereby powering off the vehicle. In this embodiment of the invention, when the vehicle meets the conditions for power-off after a collision, the airbag control system directly controls the high-voltage intelligent fuse system to switch to the fuse state, which can realize rapid power-off of the vehicle's high-voltage circuit and solve the technical problem of excessively long power-off time in related technologies. At the same time, after the airbag control system controls the high-voltage power-off, it determines whether the high-voltage intelligent fuse system has successfully blown. If the high-voltage intelligent fuse system is still in the non-disconnected state, it controls the battery management system to ignite the high-voltage intelligent fuse system a second time, avoiding vehicle safety problems caused by control failure of the airbag control system and ensuring successful high-voltage power-off of the vehicle. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a hardware structure block diagram of an electronic device for a vehicle according to one embodiment of the present invention;

[0020] Figure 2 This is a flowchart of a vehicle control method according to one embodiment of the present invention;

[0021] Figure 3 This is a flowchart of a vehicle control method according to one embodiment of the present invention;

[0022] Figure 4 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0023] Figure 5 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0024] Figure 6 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0025] Figure 7 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0026] Figure 8 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0027] Figure 9 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0028] Figure 10 This is a flowchart of a vehicle control method according to one optional embodiment of the present invention;

[0029] Figure 11 This is a flowchart of a vehicle control system according to one optional embodiment of the present invention;

[0030] Figure 12 This is a structural block diagram of a vehicle control device according to one optional embodiment of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] According to one embodiment of the present invention, an embodiment of a vehicle control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0034] This method embodiment can be executed in an electronic device or similar computing device that includes memory and a processor within a vehicle. Taking an electronic device running in a vehicle as an example, such as... Figure 1 As shown, the vehicle's electronic devices may include one or more processors 102 (processors may include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), digital signal processing (DSP) chips, microprocessors (MCUs), programmable logic devices (FPGAs), neural network processors (NPUs), tensor processors (TPUs), artificial intelligence (AI) type processors, etc.) and a memory 104 for storing data. Optionally, the vehicle's electronic devices may also include a transmission device 106 for communication functions, an input / output device 108, and a display 110. Those skilled in the art will understand that... Figure 1 The structures shown are for illustrative purposes only and do not limit the structure of the electronic devices in the vehicle described above. For example, the electronic devices in a vehicle may include more or fewer components than those described above, or have a different configuration than those described above.

[0035] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the vehicle control method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby realizing the aforementioned vehicle control method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0036] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 106 may be a Radio Frequency (RF) module used for wireless communication with the Internet.

[0037] Display 110 may be, for example, a touchscreen liquid crystal display (LCD). This LCD allows a user to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows the user to interact with the GUI via finger contact and / or gestures on a touch-sensitive surface. The human-computer interaction functions may optionally include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, a call interface, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above-mentioned human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0038] This embodiment provides a vehicle control method for an electronic device operating in the aforementioned vehicle. Figure 2 This is a flowchart of a vehicle control method according to one embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0039] Step S21: Obtain vehicle collision information of the target vehicle. The vehicle collision information includes at least the collision direction and collision speed. The vehicle collision information is obtained by the airbag control system.

[0040] Specifically, in step S21, the vehicle collision information may also include more information besides the collision direction and collision speed. For example, the vehicle collision information may also include the collision object and the collision location (such as the front of the vehicle, left side of the vehicle, right side of the vehicle, rear of the vehicle, doors, windows, windshield, etc.). Based on different combinations of vehicle collision information, various vehicle collision conditions can be generated. By subdividing these various vehicle collision conditions through the airbag control system, it is beneficial to subsequently perform high-voltage power-down control of the vehicle for different vehicle collision conditions. Among them, the collision speed can be based on CAE simulation results, and a corresponding threshold definition can be pre-set in the airbag control system.

[0041] Step S22: When it is determined that the vehicle collision information meets the collision power-off conditions, a first control strategy is generated in the control strategy set. The first control strategy is used to control the airbag control system to generate a first fuse control command. The first fuse control command is used to control the high-voltage intelligent fuse system to switch to the fuse state so that the vehicle can be powered off.

[0042] In step S22, if the vehicle collision information meets the conditions for power-off after a collision, the airbag control system directly sends a drive signal to switch the high-voltage intelligent fuse system to the fuse state. That is, the high-voltage intelligent fuse is directly cut off by the airbag control system, which can achieve power-off of the high-voltage circuit within 30ms.

[0043] Step S23: When it is determined that the airbag control system generates the first fuse control command, the state of the high-voltage intelligent fuse system is obtained. The state of the high-voltage intelligent fuse system includes the fuse state and the non-disconnect state.

[0044] Optionally, in step S23, after the airbag control system generates the first fuse control command, the battery management system simultaneously receives the first fuse control command and detects the status of the high-voltage intelligent fuse system.

[0045] Step S24: When it is determined that the state of the high-voltage intelligent fuse system is non-disconnected, a second control strategy is generated in the control strategy set. The second control strategy is used to control the battery management system to generate a second fuse control command. The second fuse control command is used to control the high-voltage intelligent fuse system to switch to the fuse state so that the vehicle can be powered off.

[0046] Specifically, in step S24, if the power battery detection system determines that the high-voltage intelligent fuse system has not completed the circuit breaking, the power battery management system sends a drive signal to the high-voltage intelligent fuse system to switch the high-voltage intelligent fuse system to the fuse state, thereby realizing the vehicle's high voltage power-off.

[0047] Through the above steps, vehicle collision information of the target vehicle is obtained. This collision information includes at least the collision direction and speed, and is detected by the airbag control system. If the collision information meets the conditions for power-off upon collision, a first control strategy is generated from the control strategy set. This first control strategy controls the airbag control system to generate a first fuse control command, which controls the high-voltage intelligent fuse system to switch to a fuse state, thereby powering off the vehicle. If the airbag control system generates the first fuse control command, the state of the high-voltage intelligent fuse system is obtained. The state of the high-voltage intelligent fuse system includes a fuse state and a non-disconnected state. If the high-voltage intelligent fuse system is determined to be in a non-disconnected state, a second control strategy is generated from the control strategy set. This second control strategy controls the battery management system to generate a second fuse control command, which controls the high-voltage intelligent fuse system to switch to a fuse state, thereby powering off the vehicle. In this embodiment of the invention, when the vehicle meets the conditions for power-off after a collision, the airbag control system directly controls the high-voltage intelligent fuse system to switch to the fuse state, which can realize rapid power-off of the vehicle's high-voltage circuit and solve the technical problem of excessively long power-off time in related technologies. At the same time, after the airbag control system controls the high-voltage power-off, it determines whether the high-voltage intelligent fuse system has successfully blown. If the high-voltage intelligent fuse system is still in the non-disconnected state, it controls the battery management system to ignite the high-voltage intelligent fuse system a second time, avoiding vehicle safety problems caused by control failure of the airbag control system and ensuring successful high-voltage power-off of the vehicle.

[0048] Optionally, the collision power-off conditions include a first collision condition and a second collision condition. The first collision condition is a forward collision with a collision speed greater than a first collision speed, and the second collision condition is a rearward collision with a collision speed greater than a second collision speed. In step S22, if the vehicle collision information is determined to meet the collision power-off conditions, a first control strategy in the control strategy set is generated, including the following execution steps:

[0049] Step S221: If the vehicle collision information satisfies either the first collision condition or the second collision condition, a first control strategy can be generated.

[0050] Through step S221, the vehicle can be promptly de-energized in the event of a frontal or rear-end collision, effectively protecting vehicle safety.

[0051] Preferably, the first collision condition is 50 km / h, and the second collision condition is 60 km / h.

[0052] It should be noted that the first and second collision conditions can be preset values ​​and scenarios. For example, based on CAE simulation experiments, the values ​​corresponding to the sending of a drive signal to trigger a high-voltage intelligent fuse to achieve power-off under different collision directions and velocities can be used. When the collision velocity exceeds a preset threshold and is consistent with a preset direction, power-off control is initiated. Furthermore, collision directions and velocities can be further added to set new collision condition thresholds, thereby increasing the overall safety of the system.

[0053] In steps S21-S24, those skilled in the art should understand that, according to actual application needs, more control strategies can be set to enable other vehicle systems to generate fuse control commands to control the high-voltage intelligent system to fuse, thereby increasing the fuse-breaking methods of the high-voltage intelligent fuse system to prevent serious consequences such as the vehicle being unable to shut down due to a battery management system failure.

[0054] like Figure 3 As shown, this application provides a preferred embodiment of a vehicle control method, including the following steps:

[0055] Step 1: The airbag control system (ACU) detects whether there is a collision in the vehicle. Once it is determined that a collision has occurred, proceed to Step 2.

[0056] Step 2: Determine whether the collision direction and collision speed of the vehicle meet the first collision condition, i.e., the front collision speed exceeds 50 km / h, or whether the collision direction and collision speed of the vehicle meet the second collision condition, i.e., the rear collision speed exceeds 60 km / h. If yes, proceed to step 3; otherwise, proceed to step 1.

[0057] Step 3: The airbag control system (ACU) drives the high-voltage smart fuse to detonate.

[0058] Step 4: The battery management system (BMS) checks whether the high-voltage smart fuse is in a non-disconnected state. If yes, proceed to step 5; otherwise, repeat this step.

[0059] Step 5: BMS drives the detonation of the high-voltage intelligent fuse.

[0060] Optionally, such as Figure 4 As shown, the vehicle control method also includes the following steps:

[0061] Step S31: Detect the status information inside the battery pack. The status information inside the battery pack includes at least the air pressure inside the battery pack and the temperature inside the battery pack.

[0062] Specifically, the battery management system (BMS) detects status information within the battery pack, such as internal air pressure and temperature, to make further judgments. Depending on actual needs, the status information within the battery pack may also include more information such as cell voltage.

[0063] Step S32: Based on the state information inside the battery pack, determine whether the battery pack has a risk of thermal runaway;

[0064] Step S33: If it is determined that the battery pack has a risk of thermal runaway, a second control strategy is generated in the control strategy set.

[0065] Steps S31-S33 can be used to quickly drive the high-voltage intelligent fuse system to disconnect the high-voltage system in the event of thermal runaway of the power battery, thereby cutting off the power to the high-voltage system and avoiding vehicle safety problems caused by subsequent thermal runaway of the battery pack.

[0066] like Figure 5 As shown, this application provides a preferred embodiment of a vehicle control method, including the following steps:

[0067] Step 1: The Battery Management System (BMS) detects changes in air pressure and cell voltage within the power battery pack. Once completed, proceed to Step 2.

[0068] Step 2: Determine whether the power battery pack meets the thermal runaway conditions. If yes, proceed to Step 3; otherwise, proceed to Step 1.

[0069] Step 3: The battery management system (BMS) sends a drive signal to the high-voltage smart fuse to detonate the high-voltage smart fuse.

[0070] Optionally, such as Figure 6 As shown, the vehicle control method also includes the following steps:

[0071] Step S41: Detect the high-voltage circuit current of the power battery;

[0072] Step S42: If it is determined that the high-voltage circuit current meets the first current condition, generate the second control strategy in the control strategy set.

[0073] Through steps S41-S42, when an abnormality is detected in the high-voltage circuit current of the power battery, the high-voltage intelligent fuse system is promptly controlled to blow, ensuring that the vehicle is powered off in time when the high-voltage circuit is abnormal or overloaded, thus protecting the vehicle's safety.

[0074] Optionally, in step S42, the high-voltage circuit current satisfies the first current condition, that is, the high-voltage circuit current is greater than the first current threshold I>I1 within the first preset time period.

[0075] Optionally, in step S42, the high-voltage circuit current satisfies the first current condition, that is, the high-voltage circuit current is greater than the second current threshold I>I2 within the second preset time period.

[0076] like Figure 7 As shown, this application provides a preferred embodiment of a vehicle control method, including the following steps:

[0077] Step 1: The battery management system (BMS) detects the current in the power battery circuit and then proceeds to step 2.

[0078] Step 2: Determine whether the current is greater than I2 throughout time T2, or whether the current is greater than I1 throughout time T1. If yes, proceed to Step 3; otherwise, proceed to Step 1.

[0079] Step 3: BMS drives the detonation of the high-voltage intelligent fuse.

[0080] Optionally, such as Figure 8 As shown, the vehicle control method also includes the following steps:

[0081] Step S51: Upon receiving the vehicle power-down command, detect the vehicle speed, high voltage success rate, and high voltage circuit current of the power battery.

[0082] Specifically, when the vehicle starts and the power-down command is given, the power battery management system checks the vehicle speed, the total high-voltage success rate, and the high-voltage circuit current of the power battery to determine whether to issue a drive signal.

[0083] Step S52: Under the condition that the vehicle speed meets the preset vehicle speed condition, the total success rate of high voltage is zero, and the high voltage circuit current meets the second current condition, a third control strategy in the control strategy set is generated. The third control strategy is used to control the battery management system to generate a disconnect command. The disconnect command is used to disconnect the high voltage relay.

[0084] Step S53: If it is determined that the battery management system has generated a disconnect command, the high-voltage circuit current is detected;

[0085] Step S54: If it is determined that the high-voltage circuit current meets the third preset current condition, a second control strategy is generated in the control strategy set.

[0086] Through steps S51-S54, the battery management system can monitor the high-voltage circuit current of the power battery after the vehicle power-down command is issued, and make a comprehensive judgment with the overall high-voltage success rate of the vehicle to determine whether there is any abnormal sticking in the high-voltage circuit, so as to ensure that the high-voltage system of the vehicle can be reliably, quickly and safely powered down.

[0087] Optionally, in step S52, the preset vehicle speed condition is vehicle speed < 5km / h, and the second current condition and the third current condition are both high voltage circuit current greater than 100A.

[0088] like Figure 9 As shown, this application provides a preferred embodiment of a vehicle control method, including the following steps:

[0089] Step 1: The vehicle controller sends a power-down command;

[0090] Step 2: After confirming that the vehicle controller has issued a power-down command, the battery management system (BMS) monitors whether the vehicle speed meets the preset speed, i.e., whether the vehicle speed is less than 5 km / h. If yes, proceed to step 3; otherwise, repeat this step.

[0091] Step 3: The power battery management system further checks whether the total success rate is 0 and whether the current of the high-voltage circuit of the power battery is >100A. If yes, it jumps to step 4; otherwise, it repeats this step.

[0092] Step four: The power battery management system sends a drive signal to detonate the high-voltage smart fuse.

[0093] In conjunction with the above embodiments of the vehicle control method, such as Figure 10 As shown, this application also provides a preferred embodiment of a vehicle control method, through... Figure 10 The method embodiment shown can promptly detonate the high-voltage smart fuse when the vehicle experiences a collision, abnormal battery pack status, abnormal power battery circuit current, or abnormal vehicle power-off. Specifically, the vehicle control method in this embodiment has the following beneficial effects:

[0094] 1) The ACU can directly detonate the high-voltage intelligent fuse, achieving power-off of the high-voltage circuit within 30ms;

[0095] 2) The BMS can receive the ACU detonation signal to confirm the status of the high-voltage intelligent fuse. If the circuit is not broken, the high-voltage intelligent fuse system can be driven again.

[0096] 3) The BMS can comprehensively judge the current status of the power battery. In case of abnormal high voltage, such as thermal runaway or high voltage relay sticking, it can drive the high voltage intelligent fuse system to disconnect, thereby realizing the function of rapid high voltage power-off.

[0097] According to another aspect of the present invention, a vehicle control system is also provided, which uses the above-described vehicle control method for control.

[0098] Figure 11 This is a flowchart of a vehicle control system according to one optional embodiment of the present invention, such as... Figure 11As shown, the vehicle control system includes a vehicle control system, a high-voltage intelligent fuse system, an airbag control system (i.e., an ACU control system), and a power battery management system. The high-voltage intelligent fuse system is connected in series with the vehicle's power battery module. The airbag control system is used to acquire vehicle collision information, which includes at least the collision direction and collision speed. The airbag control system is electrically connected to the high-voltage intelligent fuse system. The power battery management system is used to detect at least the power battery status information, vehicle speed information, and high-voltage total success rate information. The power battery status information includes at least the battery pack internal pressure, battery pack internal temperature, and high-voltage circuit current. The power battery management system is electrically connected to the vehicle control system, the high-voltage intelligent fuse system, and the airbag control system.

[0099] The vehicle control system in this embodiment differentiates between different collision conditions, enabling rapid disconnection of the high-voltage intelligent fuse only in cases of severe collisions that could disrupt the high-voltage electrical connection. This ensures both safe and rapid power-off for the entire vehicle, while avoiding the need for battery pack repairs after fuse disconnection in minor collisions. Simultaneously, the power battery can determine whether thermal runaway or overload current exists, thus triggering high-voltage power-off. A comprehensive assessment is made to determine whether the vehicle requires power-off and whether there is high-voltage relay adhesion in the high-voltage circuit, ensuring power-off in the high-voltage circuit. Furthermore, the vehicle control system in this embodiment reduces signal interaction and judgment processes between different control systems, avoiding long information processing cycles and mutual information interference issues.

[0100] Specifically, the airbag control system can distinguish between collisions at different vehicle speeds and different collision scenarios. For example, frontal collisions at speeds of 25 km / h and above 50 km / h, according to CAE simulation results, may affect the high-voltage electrical connection in a frontal collision at speeds above 50 km / h, and rearal collisions at speeds above 60 km / h may also affect the high-voltage electrical connection. The airbag control system sends a drive signal to the high-voltage intelligent fuse system when these thresholds are reached. The battery management system can monitor the status of the power battery, such as the pressure and temperature inside the battery pack, as well as the high-voltage circuit current of the power battery, the vehicle speed, and the power of each high-voltage assembly. It comprehensively judges whether there is a risk of thermal runaway of the power battery. Furthermore, when the high-voltage circuit still has a large current after the vehicle requires power-off, the battery management system can send a drive signal to the high-voltage intelligent fuse system. The high-voltage intelligent fuse system is connected in series in the power battery module and can disconnect the high-voltage circuit within 3ms after receiving the drive signal.

[0101] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0102] This embodiment also provides a vehicle control device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0103] Figure 12 This is a structural block diagram of a vehicle control device according to one embodiment of the present invention, such as... Figure 12 As shown, the device includes: a first acquisition module 61, used to acquire vehicle collision information of the target vehicle, the vehicle collision information including at least the collision direction and collision speed, the vehicle collision information being detected by the airbag control system; a first generation module 62, used to generate a first control strategy in the control strategy set when it is determined that the vehicle collision information meets the collision power-off conditions, the first control strategy being used to control the airbag control system to generate a first fuse control command, the first fuse control command being used to control the high-voltage intelligent fuse system to switch to the fuse state, so as to enable the vehicle to perform high-voltage power-off; a second acquisition module 63, used to acquire the state of the high-voltage intelligent fuse system when it is determined that the airbag control system has generated the first fuse control command, the state of the high-voltage intelligent fuse system including the fuse state and the non-disconnect state; and a second generation module 64, used to generate a second control strategy in the control strategy set when it is determined that the state of the high-voltage intelligent fuse system is the non-disconnect state, the second control strategy being used to control the battery management system to generate a second fuse control command, the second fuse control command being used to control the high-voltage intelligent fuse system to switch to the fuse state, so as to enable the vehicle to perform high-voltage power-off.

[0104] Using the vehicle control device in this embodiment, after acquiring the vehicle collision information of the target vehicle, if it is determined that the vehicle collision information meets the collision power-off conditions, a first control strategy in the control strategy set is generated. This strategy further controls the airbag control system to generate a first fuse control command to control the high-voltage intelligent fuse system to switch to the fuse state, thereby enabling the vehicle to perform high-voltage power-off. If it is determined that the airbag control system has generated the first fuse control command, and after acquiring the state of the high-voltage intelligent fuse system, if it is determined that the state of the high-voltage intelligent fuse system is non-disconnected, a second control strategy in the control strategy set is generated. This strategy further controls the battery management system to generate a second fuse control command to control the high-voltage intelligent fuse system to switch to the fuse state, thereby enabling the vehicle to perform high-voltage power-off. In this embodiment of the invention, when the vehicle meets the conditions for power-off after a collision, the airbag control system directly controls the high-voltage intelligent fuse system to switch to the fuse state, which can realize rapid power-off of the vehicle's high-voltage circuit and solve the technical problem of excessively long power-off time in related technologies. At the same time, after the airbag control system controls the high-voltage power-off, it determines whether the high-voltage intelligent fuse system has successfully blown. If the high-voltage intelligent fuse system is still in the non-disconnected state, it controls the battery management system to ignite the high-voltage intelligent fuse system a second time, avoiding vehicle safety problems caused by control failure of the airbag control system and ensuring successful high-voltage power-off of the vehicle.

[0105] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0106] Embodiments of the present invention also provide a storage medium storing a computer program, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.

[0107] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0108] Step S1: Obtain vehicle collision information of the target vehicle. The vehicle collision information includes at least the collision direction and collision speed. The vehicle collision information is obtained by the airbag control system.

[0109] Step S2: When it is determined that the vehicle collision information meets the collision power-off conditions, a first control strategy is generated in the control strategy set. The first control strategy is used to control the airbag control system to generate a first fuse control command. The first fuse control command is used to control the high-voltage intelligent fuse system to switch to the fuse state so that the vehicle can be powered off.

[0110] Step S3: When it is determined that the airbag control system generates the first fuse control command, the state of the high-voltage intelligent fuse system is obtained. The state of the high-voltage intelligent fuse system includes the fuse state and the non-disconnect state.

[0111] Step S4: When it is determined that the state of the high-voltage intelligent fuse system is non-disconnected, a second control strategy is generated in the control strategy set. The second control strategy is used to control the battery management system to generate a second fuse control command. The second fuse control command is used to control the high-voltage intelligent fuse system to switch to the fuse state so that the vehicle can be powered off.

[0112] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0113] Embodiments of the present invention also provide a processor configured to run a computer program to perform the steps in any of the above method embodiments.

[0114] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0115] Step S1: Obtain vehicle collision information of the target vehicle. The vehicle collision information includes at least the collision direction and collision speed. The vehicle collision information is obtained by the airbag control system.

[0116] Step S2: When it is determined that the vehicle collision information meets the collision power-off conditions, a first control strategy is generated in the control strategy set. The first control strategy is used to control the airbag control system to generate a first fuse control command. The first fuse control command is used to control the high-voltage intelligent fuse system to switch to the fuse state so that the vehicle can be powered off.

[0117] Step S3: When it is determined that the airbag control system generates the first fuse control command, the state of the high-voltage intelligent fuse system is obtained. The state of the high-voltage intelligent fuse system includes the fuse state and the non-disconnect state.

[0118] Step S4: When it is determined that the state of the high-voltage intelligent fuse system is non-disconnected, a second control strategy is generated in the control strategy set. The second control strategy is used to control the battery management system to generate a second fuse control command. The second fuse control command is used to control the high-voltage intelligent fuse system to switch to the fuse state so that the vehicle can be powered off.

[0119] Embodiments of the present invention also provide a vehicle, including a vehicle control system and a vehicle control device, wherein the vehicle is controlled using the vehicle control method described in the above embodiments.

[0120] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0121] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0122] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0123] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0124] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0125] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0126] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0127] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A vehicle control method characterized by, The vehicle control method comprises the following steps: obtaining vehicle collision information of a target vehicle, the vehicle collision information at least comprising a collision direction and a collision speed, the vehicle collision information being obtained by a safety airbag control system; in a case where it is determined that the vehicle collision information meets a crash power-off condition, generating a first control strategy in a control strategy set, the first control strategy being used to control the safety airbag control system to generate a first fuse control instruction, the first fuse control instruction being used to control a high-voltage intelligent fuse system to switch to a fuse-off state, so that the vehicle is powered off under high voltage; in a case where it is determined that the safety airbag control system generates the first fuse control instruction, obtaining a state of the high-voltage intelligent fuse system, the state of the high-voltage intelligent fuse system comprising the fuse-off state and a non-fuse-off state; in a case where it is determined that the state of the high-voltage intelligent fuse system is the non-fuse-off state, generating a second control strategy in the control strategy set, the second control strategy being used to control a battery management system to generate a second fuse control instruction, the second fuse control instruction being used to control the high-voltage intelligent fuse system to switch to the fuse-off state, so that the vehicle is powered off under high voltage.

2. The vehicle control method according to claim 1, characterized by, The crash power-off condition comprises a first collision condition and a second collision condition, the first collision condition being that the collision direction is a front collision and the collision speed is greater than a first collision speed, and the second collision condition being that the collision direction is a rear collision and the collision speed is greater than a second collision speed, in a case where it is determined that the vehicle collision information meets the crash power-off condition, generating a first control strategy in a control strategy set, comprising: in a case where the vehicle collision information meets any one of the first collision condition and the second collision condition, generating the first control strategy.

3. The vehicle control method according to claim 2, characterized by, The first collision speed is 50 km / h, and the second collision speed is 60 km / h.

4. The vehicle control method according to claim 1, characterized by The vehicle control method further comprises: detecting battery pack internal state information, the battery pack internal state information at least comprising battery pack internal air pressure and battery pack internal temperature; based on the battery pack internal state information, determining whether the battery pack has a risk of thermal runaway; in a case where it is determined that the battery pack has a risk of thermal runaway, generating the second control strategy in the control strategy set.

5. The vehicle control method according to claim 1, characterized by The vehicle control method further comprises: detecting a high-voltage loop current of a power battery; in a case where it is determined that the high-voltage loop current meets a first current condition, generating the second control strategy in the control strategy set.

6. The vehicle control method according to claim 5, characterized by The first current condition is: the high-voltage loop current is greater than a first current threshold value within a first preset time length, or the high-voltage loop current is greater than a second current threshold value within a second preset time length.

7. The vehicle control method according to claim 5, characterized by The vehicle control method further comprises: in a case where a vehicle power-off instruction is received, detecting a vehicle speed, a high-voltage total success rate, and the high-voltage loop current of the power battery; generate a third control strategy in the control strategy set, the third control strategy being used to control the battery management system to generate a disconnection instruction, the disconnection instruction being used to disconnect a high-voltage relay, in a case where it is determined that the vehicle speed meets a preset vehicle speed condition, the high-voltage total success rate is zero, and the high-voltage loop current meets a second current condition; detect the high-voltage loop current in a case where it is determined that the battery management system generates the disconnection instruction; generate a second control strategy in the control strategy set in a case where it is determined that the high-voltage loop current meets a third preset current condition.

8. The vehicle control method according to claim 7, characterized by, The second current condition and the third preset current condition are both that the high-voltage loop current is greater than 100 A, and / or the preset vehicle speed condition is that the vehicle speed is less than 5 km / h.

9. A vehicle control system for implementing the vehicle control method according to any one of claims 1 to 8, characterized by The vehicle control system comprises: a vehicle control system; a high-voltage intelligent fuse system, which is connected in series in a power battery module of a vehicle; an airbag control system, which is used to acquire vehicle collision information, the vehicle collision information at least including one of a collision direction and a collision speed, and the airbag control system being electrically connected with the high-voltage intelligent fuse system; a power battery management system, which is used to detect at least power battery state information, vehicle speed information, and high-voltage total success rate information, the power battery state information at least including one of an internal air pressure of a battery pack, an internal temperature of the battery pack, and a high-voltage loop current; the power battery management system being electrically connected with the vehicle control system, the high-voltage intelligent fuse system, and the airbag control system.

10. A vehicle control device characterized by comprising: comprises: a first acquisition module, which is used to acquire vehicle collision information of a target vehicle, the vehicle collision information at least including a collision direction and a collision speed, and the vehicle collision information being acquired by an airbag control system; a first generation module, which is used to generate a first control strategy in a control strategy set in a case where it is determined that the vehicle collision information meets a collision power-off condition, the first control strategy being used to control the airbag control system to generate a first fuse control instruction, the first fuse control instruction being used to control a high-voltage intelligent fuse system to switch to a fuse state, so that the vehicle is powered off under high voltage; a second acquisition module, which is used to acquire a state of the high-voltage intelligent fuse system in a case where it is determined that the airbag control system generates the first fuse control instruction, the state of the high-voltage intelligent fuse system including the fuse state and a non-disconnection state; a second generation module, which is used to generate a second control strategy in the control strategy set in a case where it is determined that the state of the high-voltage intelligent fuse system is the non-disconnection state, the second control strategy being used to control a battery management system to generate a second fuse control instruction, the second fuse control instruction being used to control the high-voltage intelligent fuse system to switch to the fuse state, so that the vehicle is powered off under high voltage.

11. A vehicle characterized by comprising: The vehicle is controlled by the vehicle control method in any one of claims 1-8.

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