Vehicle bottom collision scraping early warning method and device and vehicle

Abstract

The invention discloses a vehicle bottom collision and scraping early warning method and device and a vehicle, and relates to the technical field of vehicle protection. The vehicle bottom collision and scraping early warning method comprises the steps that the size of a tire is obtained; obtaining the load of the whole vehicle; based on the corresponding relation table of the tire size, the whole vehicle load and the vehicle bottom ground clearance, the vehicle bottom ground clearance is determined; obtaining the height of a road obstacle; and outputting early warning request information in response to the situation that the height of the road surface obstacle is not smaller than the vehicle bottom ground clearance. The vehicle bottom collision and scraping early warning device comprises a battery control system and a whole vehicle control system. The vehicle comprises the vehicle bottom collision and scraping early warning device. According to the invention, the collision and scraping risk of the battery pack can be reduced by using the existing sensor acquisition system and the acoustic and optical system of the whole vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to vehicle protection, in particular to a vehicle bottom collision and scraping early warning method and device and vehicle. BACKGROUND

[0002] At present, China's new energy vehicles have formed a global advantage in scale, technology and industry chain. As the core component of new energy vehicles, the safety performance of the battery pack directly affects the product reputation and product competitiveness. At present, the battery pack of the domestic mainstream new energy vehicle is arranged under the vehicle chassis, and the lower bottom shell of the battery pack is the "soft spot" of the battery pack. Within the whole life cycle of the vehicle, the lower bottom shell of the battery pack will suffer a large number of collisions, bumps and scratches. Because the battery pack is arranged under the vehicle chassis, the ground clearance of the battery pack is further compressed, which increases the risk of collision and scratching. After the battery pack is collided and scratched, the rust-proof coating of the battery pack may be peeled off or cracked, and the water vapor from the external environment may enter to cause insulation failure of the battery. In severe cases, it may also cause battery thermal runaway, affecting the safety of consumers' person and property. At present, the mainstream scheme of battery pack protection is divided into two kinds: (1) Optimizing the structure of the battery pack, such as adding a protective plate to the bottom layer and applying a stone impact-resistant coating to improve the impact resistance of the battery pack. Disadvantages: increasing the cost of the battery pack while sacrificing the ground clearance of the battery pack, and increasing the risk of scratching the battery pack.

[0003] (2) A large number of ranging sensor components are added to the new energy vehicle and the battery pack to monitor the maximum ground clearance of the battery pack and the height and size of the obstacle in the driving process in real time, and the two are compared to make a response. This scheme increases the cost of a large number of ranging sensors, and once an individual sensor fails, the usability of the entire scheme is greatly reduced, and the engineering implementation is difficult. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a vehicle bottom collision and scraping early warning method, device and vehicle, which can utilize the existing sensor acquisition system, sound and light system of the vehicle, without additional hardware cost, and reduce the risk of battery pack collision and scratching.

[0005] The vehicle bottom collision and scraping early warning method of the present application comprises: acquiring the tire size; acquiring the vehicle load; determining the vehicle bottom ground clearance based on the corresponding relationship table of the tire size, the vehicle load and the vehicle bottom ground clearance; acquiring the height of the road obstacle; in response to the height of the road obstacle being not less than the vehicle bottom ground clearance, outputting a warning request information.

[0006] Further, the acquiring of the tire size comprises: Sending a first request message for obtaining tire size to a vehicle control system, so that the vehicle control system constructs and feeds back a first response message based on tire size configuration parameters; wherein the tire size configuration parameters are written into the vehicle control system through an electrical inspection service when the vehicle is offline; Receive and parse the first response message to determine the tire size.

[0007] Furthermore, obtaining the vehicle load includes obtaining the number of passengers in the vehicle, and the corresponding relationship table is calibrated based on the tire size, the number of passengers in the vehicle, and the ground clearance; Obtaining the vehicle load includes obtaining the number of passengers in the vehicle, specifically including: Sending a second request message for obtaining a seat belt enable signal to the vehicle collision system, so that the vehicle collision system constructs and feeds back a second response message based on the seat belt operating state; receiving and parsing the second response message, and extracting the seat belt enabling signal; The number of passengers in the vehicle is determined based on the seat belt enable signal.

[0008] Furthermore, obtaining the vehicle load includes obtaining the total load weight, the total load weight including the weight of passengers in the vehicle and the weight of items in the vehicle, and the correspondence table is calibrated based on tire size, total load weight, and ground clearance; The acquiring the total load weight includes acquiring vehicle body suspension height information, and acquiring vehicle body suspension height information, and acquiring the total load weight based on the vehicle body suspension height information.

[0009] Furthermore, the height of the road obstacle is obtained through the vehicle intelligent driving control system.

[0010] Furthermore, the warning request information is output to the vehicle control system. After receiving the warning request information, the vehicle control system sends a warning prompt instruction to the instrument control system and the lighting control system. After receiving the warning prompt instruction, the instrument control system generates a first prompt information. After receiving the warning prompt instruction, the lighting control system generates a second prompt information. A vehicle bottom collision and scraping warning device in the present invention includes a battery control system and a vehicle control system; The battery control system is configured to: obtain tire size; obtain vehicle load; determine vehicle ground clearance based on a corresponding relationship table among tire size, vehicle load, and vehicle ground clearance; obtain a road obstacle height; and, in response to the road obstacle height being not less than the vehicle ground clearance, output a warning request message to the vehicle control system; The vehicle control system is used to: after receiving the warning request information, send a warning prompt instruction to the instrument control system and the lighting control system.

[0011] Furthermore, the battery control system is further configured to: send a first request message to the vehicle control system for obtaining tire size; receive and analyze a first response message fed back by the vehicle control system to determine the tire size; The vehicle control system is further configured to construct and feed back a first response message based on tire size configuration parameters after receiving a first request message from the battery control system; wherein the tire size configuration parameters are written into the vehicle control system through an electrical inspection service when the vehicle is offline.

[0012] Furthermore, obtaining the vehicle load includes obtaining the number of passengers in the vehicle or obtaining the total weight of the load; When obtaining the vehicle load includes obtaining the number of passengers in the vehicle, the correspondence table is calibrated based on the tire size, the number of passengers in the vehicle, and the ground clearance; the device also includes a vehicle collision system; the battery control system is further configured to: send a second request message to the vehicle collision system for obtaining a seat belt enable signal, receive and parse a second response message fed back by the vehicle collision system and extract the seat belt enable signal, and determine the number of passengers in the vehicle based on the seat belt enable signal; the vehicle collision system is configured to: after receiving the second request message sent by the battery control system, construct and feed back a second response message based on the seat belt operating status; When obtaining the vehicle load includes obtaining the total load weight, the total load weight includes the weight of the passengers in the vehicle and the weight of the items in the vehicle, and the correspondence table is calibrated based on the tire size, the total load weight and the ground clearance under the vehicle; the vehicle control system is also used to: collect the vehicle body suspension height information through the height sensor; the battery control system is also used to: obtain the vehicle body suspension height information, and obtain the total load weight based on the vehicle body suspension height information.

[0013] Furthermore, it also includes the vehicle intelligent driving control system, instrument control system and lighting control system; The vehicle intelligent driving control system is used to: obtain the height of road obstacles in real time and send it to the battery control system; The instrument control system is used to: generate first prompt information after receiving the early warning prompt instruction issued by the vehicle control system; The lighting control system is used to generate second prompt information after receiving the early warning prompt instruction issued by the vehicle control system.

[0014] A vehicle in the present invention includes the above-mentioned vehicle bottom collision and scrape warning device.

[0015] The beneficial effects of the present invention are: (1) The present application does not need to make great changes to the battery and the whole vehicle arrangement, utilizes the existing sensor collection system and sound and light system of the whole vehicle, does not increase hardware equipment, increases the identification avoidance strategy of the height of the road obstacle and the height of the road edge, and if the clearance between the vehicle bottom and the ground is exceeded, the driver is prompted to avoid in a sound and light manner, so as to reduce the risk of collision and scratching of the battery pack.

[0016] (2) For the same vehicle model, only a corresponding relationship table of the tire size, the number of passengers in the vehicle and the clearance between the vehicle bottom and the ground (or a corresponding relationship table of the tire size, the total weight of the load and the clearance between the vehicle bottom and the ground) needs to be established, the identification avoidance strategy of the height of the road obstacle and the height of the road edge does not need to be differentiated for the same vehicle model, and for different configurable tire sizes of the vehicle model, the tire size configuration parameter can be written into the whole vehicle control system through the electrical inspection service when the whole vehicle is delivered, so that the same corresponding table is realized, and the software development cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present application provides the following drawings for illustration: Figure 1 A step schematic diagram of the vehicle bottom collision and scratching early warning method in embodiment one; Figure 2 A flowchart schematic diagram of the vehicle bottom collision and scratching early warning method in embodiment one; Figure 3 An architecture diagram of the vehicle bottom collision and scratching early warning device in embodiment two; Figure 4 A corresponding relationship table of the tire size, the number of passengers in the vehicle and the clearance between the vehicle bottom and the ground in embodiment one or two; Figure 5 A step schematic diagram of the vehicle bottom collision and scratching early warning method in embodiment three; Figure 6 A flowchart schematic diagram of the vehicle bottom collision and scratching early warning method in embodiment three; Figure 7 An architecture diagram of the vehicle bottom collision and scratching early warning device in embodiment four; Figure 8 A corresponding relationship table of the tire size, the total weight of the load and the clearance between the vehicle bottom and the ground in embodiment three or four. DETAILED DESCRIPTION

[0018] The technical scheme of the present application will be described in detail below in combination with the drawings and embodiments.

[0019] Embodiment one: As Figure 1 and Figure 2As shown, a vehicle bottom collision and scratch warning method in this embodiment includes the following steps: S1. A correspondence table among tire size, number of passengers in the vehicle, and ground clearance is preset in the battery control system.

[0020] Under normal vehicle driving conditions, the factors that significantly influence the battery pack's ground clearance are tire size and vehicle load. Tire size is calibrated based on the tire sizes that can be configured for the vehicle. For example, a certain passenger car model has three tire sizes: the standard tire is 235 / 55R19 (19 inches), the first optional tire is 255 / 45R20 (20 inches), and the second optional tire is 255 / 40R21 (21 inches). Tire pressure is uniformly calibrated according to the configured tire pressure lower limit (the vehicle tire pressure monitoring warning threshold, 2.3 bar). The vehicle load is divided into two parts: the weight of the passengers and the weight of the items in the vehicle. The passenger weight is calibrated at 75kg per seat, and the weight of the items in the vehicle defaults to a full load. If the vehicle is not fully loaded, it will not affect the safe operation of this warning method.

[0021] From the above, we can see that when calibrating the corresponding relationship table for a certain vehicle model, we can go through the following steps: S101. Install a tire, where the tire is one of the configurable tire sizes for the vehicle model and the tire pressure is set to the lower limit. S102, setting the weight of the items in the vehicle to a full load state using a counterweight; S103. After placing a 75 kg dummy in the driver's seat, measure and record the ground clearance of the vehicle. S104. Add a 75 kg dummy to the remaining seat and measure and record the ground clearance at this time. S105, repeating step S104 until the total number of dummies in the vehicle reaches the maximum rated number of passengers for the vehicle model; S106: Replace the tire with another configurable tire size for the vehicle model, set the tire pressure to the lower limit, and then repeat steps S103-S105; S107. Repeat step S106 until all configurable tire sizes for the vehicle model are calibrated. For example, when the first tire size is 235 / 55R19 (19 inches) and the number of passengers is one, the ground clearance is A1; when the first tire size is 235 / 55R19 (19 inches) and the number of passengers is two, the ground clearance is A2, and so on. S108: Based on all recorded vehicle bottom ground clearances, complete the following steps: Figure 4 The corresponding relationship table of tire size, number of passengers in the car and ground clearance is written into the battery control system.

[0022] S2. Obtain tire size. This step specifically includes the following steps: S201: The battery control system sends a first request message to the vehicle control system for obtaining tire size, so that the vehicle control system constructs and feeds back a first response message based on tire size configuration parameters; wherein the tire size configuration parameters are written into the vehicle control system through the electrical inspection service when the vehicle is offline; S202: The battery control system receives and parses the first response message to determine the tire size.

[0023] S3. Obtain the number of passengers in the vehicle. This step specifically includes the following steps: S301: The battery control system sends a second request message for obtaining a seat belt enable signal to the vehicle collision system, so that the vehicle collision system constructs and feeds back a second response message based on the seat belt operating status; S302: The battery control system receives and parses the second response message to extract the seat belt enable signal; S303: The battery control system determines the number of passengers in the vehicle based on the seat belt enable signal.

[0024] China's road safety and traffic management requires that drivers and passengers must wear seat belts when riding in a vehicle. The number of passengers in the vehicle can be determined through the seat belt enable signal. Of course, the number of passengers in the vehicle can also be determined through other existing technologies such as in-vehicle cameras. In this embodiment, the method of determining the number of passengers in the vehicle through the seat belt enable signal is relatively simple and does not require complex algorithms such as image processing, target detection, and headcounting.

[0025] S4. Determine the ground clearance based on the tire size, the number of passengers in the vehicle, and the corresponding relationship table preset in step S1.

[0026] After obtaining the tire size and the number of passengers in the vehicle, the ground clearance can be determined by looking up the table based on the correspondence table of tire size, number of passengers, and ground clearance preset in step S1. During calibration, tire pressure is uniformly set to the configured tire pressure lower limit, the passenger weight is calibrated at 75 kg per seat, and the weight of items in the vehicle is assumed to be fully loaded. During actual driving, the actual tire pressure, passenger weight, and item weight may differ from those during calibration. Although the ground clearance determined by looking up the table is not the actual and precise ground clearance, the actual and precise ground clearance is typically not less than the ground clearance determined by looking up the table, and therefore does not affect the safety of the vehicle underbody collision and scratch warning method of this embodiment.

[0027] S5. The battery control system obtains the height of road obstacles through the vehicle's intelligent driving control system.

[0028] The road obstacle height is obtained by the whole vehicle intelligent driving control system, and the road obstacle height information within 300 meters in front of the whole vehicle is collected by the front and rear distance measuring sensors or radar sensors configured by the whole vehicle intelligent driving control system, and the information is sent to the battery control system through the whole vehicle CAN network, so that the battery controller system compares the value with the vehicle bottom ground clearance.

[0029] S6, in response to the road obstacle height being not less than the vehicle bottom ground clearance, the battery control system outputs a warning request information to the whole vehicle control system.

[0030] S7, the battery control system outputs the warning request information to the whole vehicle control system, and the whole vehicle control system sends a warning prompt instruction to the instrument control system and the lamp control system after receiving the warning request information; the instrument control system generates first prompt information after receiving the warning prompt instruction; the lamp control system generates second prompt information after receiving the warning prompt instruction.

[0031] The first prompt information is a collision warning risk flashing on the instrument. The second prompt information is that the whole vehicle double flash is opened, frequently switched and continuously sounds. The first prompt information and the second prompt information jointly issue a warning prompt information to the driver, and the double flash also issues a warning prompt to the driver of the vehicle behind or in the nearby lane, reminding him to keep the distance and reduce the risk of accident.

[0032] S8, in response to the road obstacle height being less than the vehicle bottom ground clearance and the duration being not less than a preset time (for example, 1S), the battery control system stops outputting the warning request information to the whole vehicle control system, and the instrument prompts to clear and the lamp enables to clear after the whole vehicle control system identifies that the battery control system stops outputting the warning request information.

[0033] The specific application scene of the vehicle bottom collision and scratch warning method in the embodiment is as follows: 1. The whole vehicle drives at low speed across the road bench edge: the whole vehicle intelligent driving control system detects the road bench edge height (i.e. the road obstacle height) by the front distance measuring sensor or radar sensor, the battery control system compares the vehicle bottom ground clearance with the road obstacle height collected by the whole vehicle intelligent driving control system, and if there is a bottom collision and scratch risk, the driver is prompted to stop the crossing action by the collision warning risk flashing, the whole vehicle double flash opening, the frequent opening and closing switching and the continuous sounding; 2. When the vehicle encounters a protrusion on the ground during normal driving: the vehicle's intelligent driving control system detects the height of the protrusion on the road (i.e., the height of the road obstacle) through resources such as the front ranging sensor or radar sensor. The battery control system compares the ground clearance under the vehicle with the height of the road obstacle collected by the vehicle's intelligent driving control system. If there is a risk of bottom collision or scratching, the collision warning risk flashes, the vehicle's double flash turns on, and it switches on and off frequently while making a continuous sound to prompt the driver to slow down and observe when passing, and remind nearby vehicles to keep a safe distance to reduce the risk of accidents.

[0034] The vehicle underbody collision and scrape warning method in this embodiment does not require major changes to the battery or vehicle layout. It utilizes the vehicle's existing sensor acquisition system and audio and video systems, eliminating the need for additional hardware. It incorporates a strategy for identifying and avoiding road obstacle heights and curb edges. If ground clearance is exceeded, the driver is prompted to avoid the obstacle using audio and video, reducing the risk of battery pack collisions and scrapes. Furthermore, for a given vehicle model, only a table needs to be established for tire size, number of passengers, and ground clearance. Different strategies for identifying and avoiding road obstacle heights and curb edges are not required for the same vehicle model. A common, unified table is implemented for each model's various configurable tire sizes by writing tire size configuration parameters into the vehicle control system via an electronic inspection service when the vehicle rolls off the production line, reducing software development costs.

[0035] Example 2: like Figure 3 As shown, a vehicle bottom collision and scrape warning device in this embodiment is used to implement the vehicle bottom collision and scrape warning method in embodiment 1. The device includes a battery control system and a vehicle control system; The battery control system is configured to: preset a correspondence table between tire size, number of passengers in the vehicle, and ground clearance; obtain tire size; obtain the number of passengers in the vehicle; determine ground clearance based on the tire size, number of passengers in the vehicle, and the correspondence table; obtain the height of a road obstacle; and, in response to the height of the road obstacle being no less than the ground clearance, output a warning request message to the vehicle control system; The vehicle control system is used to: after receiving the warning request information, send a warning prompt instruction to the instrument control system and the lighting control system.

[0036] In this embodiment, the battery control system is further configured to: send a first request message to the vehicle control system for obtaining tire size; receive and analyze a first response message fed back by the vehicle control system to determine the tire size; The vehicle control system is further configured to: after receiving the first request message sent by the battery control system, construct and feed back a first response message based on a tire size configuration parameter; wherein the tire size configuration parameter is written into the vehicle control system by an electrical inspection service when the vehicle is delivered.

[0037] In the embodiment, the vehicle collision system is further included. The battery control system is further configured to: send a second request message for obtaining a seat belt enable signal to the vehicle collision system; receive and analyze a second response message fed back by the vehicle collision system to extract the seat belt enable signal; and determine the number of passengers in the vehicle based on the seat belt enable signal. The vehicle collision system is configured to: after receiving the second request message sent by the battery control system, construct and feed back a second response message based on a seat belt working state.

[0038] In the embodiment, the vehicle intelligent driving control system, the instrument control system, and the lamp control system are further included. The vehicle intelligent driving control system is configured to: acquire a road obstacle height in real time and send the road obstacle height to the battery control system. The instrument control system is configured to: after receiving a pre-warning prompt instruction sent by the vehicle control system, generate a first prompt information. The lamp control system is configured to: after receiving a pre-warning prompt instruction sent by the vehicle control system, generate a second prompt information.

[0039] The front and rear ranging sensors or radar sensors configured by the vehicle intelligent driving control system collect road obstacle height information within 300 meters in front of the vehicle, and send the information to the battery control system through the vehicle CAN network, so that the battery control system compares the value with the vehicle underbody ground clearance.

[0040] The first prompt information is a flashing prompt of a collision pre-warning risk on the instrument. The second prompt information is that the vehicle double flash is opened, frequently switched on and off, and continuously emits a sound. The first prompt information and the second prompt information jointly send a pre-warning prompt information to the driver, and the double flash also pre-warns the drivers of vehicles behind or in nearby lanes, reminding them to maintain a distance and reduce the risk of accidents.

[0041] The specific application scenarios of the vehicle bottom collision and scraping pre-warning device in the embodiment are as follows: 1. The vehicle low-speed driving across the road bench edge: the vehicle intelligent driving control system detects the road bench edge height (i.e. the road obstacle height) through the front ranging sensor or radar sensor, etc. The battery control system compares the vehicle bottom clearance with the road obstacle height collected by the vehicle intelligent driving control system. If there is a risk of bottom collision and scratching, the collision warning risk flashes, the vehicle double flash is turned on, the frequent on-off switching is performed and the sound is continuously emitted to prompt the driver to stop the crossing action. 2. The vehicle normally driving encounters ground protrusions: the vehicle intelligent driving control system detects the road protrusion height (i.e. the road obstacle height) through the front ranging sensor or radar sensor, etc. The battery control system compares the vehicle bottom clearance with the road obstacle height collected by the vehicle intelligent driving control system. If there is a risk of bottom collision and scratching, the collision warning risk flashes, the vehicle double flash is turned on, the frequent on-off switching is performed and the sound is continuously emitted to prompt the driver to slow down and observe the passing, and to remind the nearby vehicles to maintain the vehicle distance, thereby reducing the risk of accidents.

[0042] The vehicle bottom collision and scratching warning device in the embodiment does not need to make big changes to the battery and vehicle layout. It uses the existing sensor collection system and sound and light system of the vehicle, does not increase hardware devices, increases the identification avoidance strategy of the road obstacle height and the road edge height, and if the vehicle bottom clearance is exceeded, the driver is prompted to avoid by sound and light, thereby reducing the risk of battery pack collision and scratching. Moreover, for the same vehicle model, only a corresponding relationship table of tire size, number of passengers in the vehicle and vehicle bottom clearance needs to be established. The same vehicle model does not need to be differentiated to set the road obstacle height and road edge height identification avoidance strategy. For different configurable tire sizes of the vehicle model, the tire size configuration parameter can be written into the vehicle control system through the electrical inspection service when the vehicle is delivered, so as to realize the same corresponding table, thereby reducing the software development cost.

[0043] Embodiment Three As shown in Figure 5 and Figure 6 , the vehicle bottom collision and scratching warning method in the embodiment includes the following steps: P1. The battery control system predefines a corresponding relationship table of tire size, total load weight and vehicle bottom clearance.

[0044] Under normal vehicle driving conditions, the factors that significantly influence the battery pack's ground clearance are tire size and vehicle load. Tire size is calibrated based on the tire sizes that can be configured for the vehicle. For example, a certain passenger car model has three tire sizes: the standard tire is 235 / 55R19 (19 inches), the first optional tire is 255 / 45R20 (20 inches), and the second optional tire is 255 / 40R21 (21 inches). Tire pressures are uniformly calibrated based on the configured tire pressure lower limit (the vehicle tire pressure monitoring warning threshold, 2.3 bar). Vehicle load is divided into two parts: the weight of the passengers and the weight of the items inside the vehicle.

[0045] From the above, we can see that when calibrating the corresponding relationship table for a certain vehicle model, we can go through the following steps: P101. Install a tire that is one of the configurable tire sizes for this vehicle model and set the tire pressure to the lower limit. P102: Place a 50kg counterweight on the driver's seat and measure and record the ground clearance. P103: Add a 50kg counterweight to any remaining seat or trunk, and measure and record the ground clearance. P104, repeat step P103 until the total weight of the counterweight reaches the upper limit of the total load weight designed for the vehicle; P105: Replace the tire with another configurable tire size for the vehicle model and set the tire pressure to the lower limit. Then repeat steps P102-P104. P106. Repeat step P105 until all configurable tire sizes for the vehicle model are calibrated. For example, when the first tire size is 235 / 55R19 (19 inches) and the total weight of the ballast is 50 kg, the ground clearance is a1. When the first tire size is 235 / 55R19 (19 inches) and the total weight of the ballast is 100 kg, the ground clearance is a2. ... P107, based on all recorded vehicle ground clearances, complete Figure 8 The corresponding relationship table of tire size, total load weight and ground clearance of the vehicle is written into the battery control system.

[0046] P2. Obtain tire size. This step specifically includes the following steps: P201: The battery control system sends a first request message to the vehicle control system for obtaining tire size, so that the vehicle control system constructs and returns a first response message based on tire size configuration parameters. The tire size configuration parameters are written into the vehicle control system through the electrical inspection service when the vehicle is offline. P202, the battery control system receives and analyzes the first response message to determine the tire size.

[0047] P3, the total load weight is obtained. This step specifically includes the following steps: P301, the battery control system obtains the vehicle body suspension height information. The vehicle body suspension height information is collected by the height sensor of the vehicle control system and then sent to the battery control system.

[0048] P302, the battery control system obtains the total load weight based on the vehicle body suspension height information. The total load weight can be obtained in the following two ways based on the vehicle body suspension height information: (1) calibration experiment: measure the real vehicle data of the vehicle body suspension height under different loads, generate a calibration curve or a lookup table database. (2) Real-time calculation: measure the real vehicle data of the vehicle body suspension height under different loads, train a prediction model using the real vehicle data, and calculate the total load weight by substituting the vehicle body suspension height information obtained by the height sensor into the prediction model.

[0049] P4, based on the tire size, the total load weight, and the corresponding relationship table preset in step P1, the vehicle underbody clearance is determined.

[0050] After obtaining the tire size and the total load weight, the vehicle underbody clearance can be determined by looking up the corresponding relationship table of the tire size, the total load weight, and the vehicle underbody clearance preset in step P1. When looking up the table, the total load weight is taken as the upper value, for example, if the total load weight in the corresponding relationship table preset in step P1 is 50kg, 100kg, 150kg, etc., if the obtained total load weight is 80kg, then take 100kg when looking up the table, if the obtained total load weight is 120kg, then take 150kg when looking up the table.

[0051] Compared with the technical solution of embodiment one, the vehicle underbody clearance obtained in this embodiment is more accurate and safer. At the same time, the shape of the vehicle body suspension is fixed, so only one or several height sensors are needed to detect the vehicle body suspension height information. The ground may be uneven, so a large number of ranging sensors are needed to measure the ground clearance of the battery pack. In this embodiment, the vehicle body suspension height information is detected by the height sensor, which still reduces the number of sensors and reduces the hardware cost compared with the traditional method of measuring the ground clearance of the battery pack by a large number of ranging sensors.

[0052] P5, the battery control system obtains the road obstacle height through the vehicle intelligent driving control system.

[0053] The road obstacle height is obtained by the whole vehicle intelligent driving control system, and the road obstacle height information within 300 meters in front of the whole vehicle is collected by the front and rear distance measuring sensors or radar sensors configured by the whole vehicle intelligent driving control system, and the information is sent to the battery control system through the whole vehicle CAN network, so that the battery controller system compares the value with the vehicle bottom ground clearance in the subsequent process.

[0054] P6, in response to the road obstacle height being not less than the vehicle bottom ground clearance, the battery control system outputs a warning request information to the whole vehicle control system.

[0055] P7, the battery control system outputs the warning request information to the whole vehicle control system, and the whole vehicle control system sends a warning prompt instruction to the instrument control system and the lamp control system after receiving the warning request information; the instrument control system generates first prompt information after receiving the warning prompt instruction; the lamp control system generates second prompt information after receiving the warning prompt instruction.

[0056] The first prompt information is a collision warning risk flashing on the instrument. The second prompt information is that the whole vehicle double flash is opened, frequently opened and closed, and continuously emits sound. The first prompt information and the second prompt information jointly issue a warning prompt information to the driver, and the double flash also warns the driver of the vehicle behind or in the nearby lane, reminding him to keep the distance and reduce the risk of accident.

[0057] S8, in response to the road obstacle height being less than the vehicle bottom ground clearance and the duration being not less than a preset time (for example, 1S), the battery control system stops outputting the warning request information to the whole vehicle control system, and the instrument prompts to clear and the lamp enables to clear after the whole vehicle control system recognizes that the battery control system stops outputting the warning request information.

[0058] The specific application scene of the vehicle bottom collision and scratch warning method in the embodiment is the same as that in embodiment one.

[0059] The vehicle underbody collision and scrape warning method in this embodiment does not require major changes to the battery or vehicle layout. It utilizes height sensors, the vehicle's existing sensor acquisition system, and its audio and optical systems, without adding any additional hardware. It incorporates a strategy for identifying and avoiding road obstacle heights and curb edges. If ground clearance is exceeded, the driver is prompted to avoid the obstacle using audio and visual signals, reducing the risk of battery pack collisions and scrapes. Furthermore, for a given vehicle model, only a table needs to be established for tire size, gross load weight, and ground clearance. Different strategies for identifying and avoiding road obstacle heights and curb edges are not required for each vehicle model. A common, universal mapping table is implemented for each model's various configurable tire sizes by writing tire size configuration parameters into the vehicle control system via an electronic inspection service when the vehicle rolls off the production line, reducing software development costs.

[0060] Example 4: like Figure 7 As shown, a vehicle bottom collision and scraping warning device in this embodiment is used to implement the vehicle bottom collision and scraping warning method in Example 3. The device includes a battery control system and a vehicle control system; The battery control system is configured to: preset a correspondence table between tire size, total load weight, and ground clearance; obtain tire size; obtain total load weight; determine ground clearance based on the tire size, total load weight, and the correspondence table; obtain the height of a road obstacle; and, in response to the road obstacle height being no less than the ground clearance, output a warning request message to the vehicle control system; The vehicle control system is used to: after receiving the warning request information, send a warning prompt instruction to the instrument control system and the lighting control system.

[0061] In this embodiment, the battery control system is further configured to: send a first request message to the vehicle control system for obtaining tire size; receive and analyze a first response message fed back by the vehicle control system to determine the tire size; The vehicle control system is further configured to construct and feed back a first response message based on tire size configuration parameters after receiving a first request message from the battery control system; wherein the tire size configuration parameters are written into the vehicle control system through an electrical inspection service when the vehicle is offline.

[0062] In this embodiment, the total load weight includes the weight of passengers in the vehicle and the weight of items in the vehicle, and the correspondence table is calibrated based on the tire size, total load weight and ground clearance; the vehicle control system is also used to: collect vehicle body suspension height information through a height sensor; the battery control system is also used to: obtain vehicle body suspension height information, and obtain the total load weight based on the vehicle body suspension height information.

[0063] In this embodiment, the vehicle intelligent driving control system, the instrument control system, and the lamp control system are also included. The vehicle intelligent driving control system is configured to acquire the height of the road obstacle in real time and send it to the battery control system. The instrument control system is configured to generate first prompt information after receiving the early warning prompt instruction from the vehicle control system. The lamp control system is configured to generate second prompt information after receiving the early warning prompt instruction from the vehicle control system.

[0064] The front and rear ranging sensors or radar sensors configured by the vehicle intelligent driving control system collect the height information of the road obstacle within 300 meters in front of the vehicle and send the information to the battery control system through the vehicle CAN network, so that the battery controller system compares the value with the vehicle underbody ground clearance.

[0065] The first prompt information is the flashing of the collision warning risk prompt on the instrument. The second prompt information is the opening of the vehicle double flash, the frequent opening and closing switching, and the continuous sound. The first prompt information and the second prompt information jointly issue the early warning prompt information to the driver, and the double flash also warns the drivers of the vehicles behind or in the nearby lane, reminding them to maintain the vehicle distance and reduce the risk of accidents.

[0066] The specific application scenarios of the vehicle underbody collision and scratch early warning device in this embodiment are the same as those in Embodiment Two.

[0067] Embodiment Five The vehicle in this embodiment includes the vehicle underbody collision and scratch early warning device in Embodiment Two. The vehicle can be, but is not limited to, a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle, etc.

[0068] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A vehicle bottom collision and scratch warning method, characterized in that: include: Get tire size; Get the vehicle load; Determine the ground clearance based on the corresponding relationship table of tire size, vehicle load and ground clearance; Get the height of road obstacles; In response to the height of the road obstacle being not less than the ground clearance, outputting warning request information.

2. The vehicle bottom collision and scratch warning method according to claim 1, characterized in that: The obtaining of tire size includes: Sending a first request message for obtaining tire size to a vehicle control system, so that the vehicle control system constructs and feeds back a first response message based on tire size configuration parameters; wherein the tire size configuration parameters are written into the vehicle control system through an electrical inspection service when the vehicle is offline; Receive and parse the first response message to determine the tire size.

3. The vehicle bottom collision and scraping warning method according to claim 1, characterized in that: The obtaining of the vehicle load includes obtaining the number of passengers in the vehicle, and the corresponding relationship table is calibrated based on the tire size, the number of passengers in the vehicle, and the ground clearance; Obtaining the vehicle load includes obtaining the number of passengers in the vehicle, specifically including: Sending a second request message for obtaining a seat belt enable signal to the vehicle collision system, so that the vehicle collision system constructs and feeds back a second response message based on the seat belt operating state; receiving and parsing the second response message, and extracting the seat belt enabling signal; The number of passengers in the vehicle is determined based on the seat belt enable signal.

4. The vehicle bottom collision and scratch warning method according to claim 1, characterized in that: Obtaining the vehicle load includes obtaining the total load weight, where the total load weight includes the weight of passengers in the vehicle and the weight of items in the vehicle, and the correspondence table is calibrated based on tire size, total load weight, and ground clearance; The acquiring the total load weight includes acquiring vehicle body suspension height information, and acquiring vehicle body suspension height information, and acquiring the total load weight based on the vehicle body suspension height information.

5. The vehicle bottom collision and scratch warning method according to claim 1, characterized in that: The height of the road obstacle is obtained by the vehicle intelligent driving control system; the warning request information is output to the vehicle control system, and after receiving the warning request information, the vehicle control system issues a warning prompt instruction to the instrument control system and the lighting control system; After receiving the early warning prompt instruction, the instrument control system generates a first prompt message; After receiving the early warning prompt instruction, the lighting control system generates second prompt information.

6. A vehicle bottom collision and scratch warning device, characterized by: Including battery control system and vehicle control system; The battery control system is used to: obtain tire size; obtain vehicle load; determining the ground clearance based on a corresponding relationship table of tire size, vehicle load, and ground clearance; obtaining a height of a road obstacle; and outputting a warning request message to the vehicle control system in response to the road obstacle height being not less than the ground clearance; The vehicle control system is used to: after receiving the warning request information, send a warning prompt instruction to the instrument control system and the lighting control system.

7. The vehicle bottom collision and scraping warning device according to claim 6, characterized in that: The battery control system is further configured to: send a first request message to the vehicle control system for obtaining tire size; receive and analyze a first response message fed back by the vehicle control system to determine the tire size; The vehicle control system is further configured to construct and feed back a first response message based on tire size configuration parameters after receiving a first request message from the battery control system; wherein the tire size configuration parameters are written into the vehicle control system through an electrical inspection service when the vehicle is offline.

8. The vehicle bottom collision and scraping warning device according to claim 6, characterized in that: Obtaining the vehicle load includes obtaining the number of passengers in the vehicle or obtaining the total weight of the load; When obtaining the vehicle load includes obtaining the number of passengers in the vehicle, the correspondence table is calibrated based on the tire size, the number of passengers in the vehicle, and the ground clearance; the device also includes a vehicle collision system; the battery control system is further configured to: send a second request message to the vehicle collision system for obtaining a seat belt enable signal, receive and parse a second response message fed back by the vehicle collision system and extract the seat belt enable signal, and determine the number of passengers in the vehicle based on the seat belt enable signal; the vehicle collision system is configured to: after receiving the second request message sent by the battery control system, construct and feed back a second response message based on the seat belt operating status; When obtaining the vehicle load includes obtaining the total load weight, the total load weight includes the weight of the passengers in the vehicle and the weight of the items in the vehicle, and the correspondence table is calibrated based on the tire size, the total load weight and the ground clearance under the vehicle; the vehicle control system is also used to: collect the vehicle body suspension height information through the height sensor; the battery control system is also used to: obtain the vehicle body suspension height information, and obtain the total load weight based on the vehicle body suspension height information.

9. The vehicle bottom collision and scraping warning device according to claim 6, characterized in that: It also includes the vehicle intelligent driving control system, instrument control system and lighting control system; The vehicle intelligent driving control system is used to: obtain the height of road obstacles in real time and send it to the battery control system; The instrument control system is used to: generate first prompt information after receiving the early warning prompt instruction issued by the vehicle control system; The lighting control system is used to generate second prompt information after receiving the early warning prompt instruction issued by the vehicle control system.

10. A vehicle, characterized in that: It includes the vehicle bottom collision and scratch warning device as described in any one of claims 6 to 9.

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