Method and system for actively preventing bottom collision of battery pack and vehicle

Abstract

The invention relates to the technical field of battery pack safety protection, in particular to a method and system for actively preventing a battery pack from underpinning collision and a vehicle, and the method comprises the steps that when the vehicle is in a parking pre-starting state, obstacle information below the vehicle bottom is detected in real time, and the obstacle information comprises the height of an obstacle; comparing the height of the detected obstacle with the current ground clearance of the battery pack and the maximum ground clearance of the battery pack; if the height of the obstacle is smaller than the current ground clearance of the battery pack, the vehicle is normally started and passes; if the height of the obstacle is larger than or equal to the current terrain clearance of the battery pack but smaller than the maximum terrain clearance of the battery pack, the height of the whole vehicle is increased, so that the terrain clearance of the battery pack is larger than the height of the obstacle; and if the height of the obstacle is greater than or equal to the maximum terrain clearance of the battery pack, executing first battery pack collision early warning. The battery pack can be protected from being scraped and collided when the vehicle is in the parking pre-starting state.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack safety protection, and particularly relates to a method, a system and a vehicle for actively preventing the bottom collision of a battery pack. Background Art

[0002] With the increasing global emphasis on environmental protection and energy sustainable development, new energy vehicles have shown a rapid development trend in the automotive industry due to their significant advantages such as zero emissions or low emissions and high energy utilization efficiency. The continuous iteration and upgrade of technology have promoted the continuous improvement of the performance of new energy vehicles, and more and more new energy vehicles have entered thousands of households and become an important means of transportation for people's daily travel.

[0003] As a key component of new energy vehicles, the performance of the battery pack is directly related to the core indicators such as the safety, reliability and driving range of the whole vehicle. The reasonable setting of the ground clearance of the battery pack is crucial for ensuring the safety of the battery under complex road conditions. If the ground clearance is not designed properly, the battery pack is extremely vulnerable to impacts, scratches and other damages during the vehicle's driving process, which may in turn lead to battery failures and even serious safety accidents.

[0004] Currently, some automobile enterprises and research institutions are committed to developing technical solutions to ensure the safety of the battery pack during the vehicle's driving process. For example, by adjusting the suspension system to optimize the vehicle's passing performance during driving to reduce the collision risk between the battery pack and road obstacles; or using sensors to monitor the road conditions in real time, and when detecting road conditions that may pose a threat to the battery pack, issuing a warning to the driver. However, these strategies have obvious deficiencies.

[0005] On the one hand, the control strategies during the driving process mainly focus on the safety of the vehicle in the moving state and lack effective countermeasures for potential risks that may be faced during the pre-start stage of vehicle parking. When the vehicle is pre-started after parking, if there is an obstacle under the vehicle and the driver fails to notice it in time, the battery is very likely to directly collide with the obstacle after the vehicle starts, resulting in damage or even fire of the battery pack.

[0006] On the other hand, the control strategies during the driving process often need the vehicle to be in a certain driving speed or state to play a role.

[0007] Therefore, it is necessary to develop a new method, system and vehicle for actively preventing the bottom collision of a battery pack. Summary of the Invention

[0008] The purpose of the present invention is to provide a method, a system and a vehicle for actively preventing the bottom collision of a battery pack, which can protect the battery pack from scraping when the vehicle is in the pre-start state of parking.

[0009] In a first aspect, a method for actively preventing the bottom collision of a battery pack according to the present invention includes the following steps: When the vehicle is in the pre-start parking state, the obstacle information under the vehicle bottom is detected in real time, and the obstacle information includes the height of the obstacle; The height of the detected obstacle is compared with the current ground clearance of the battery pack and the maximum ground clearance of the battery pack; If the height of the obstacle is less than the current ground clearance of the battery pack, the vehicle starts normally and drives through; If the height of the obstacle is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, the height of the whole vehicle is increased so that the ground clearance of the reinforcement plate of the battery pack bottom plate is greater than the height of the obstacle; If the height of the obstacle is greater than or equal to the maximum ground clearance of the battery pack, the first battery pack collision warning is executed.

[0010] Optionally, when the first battery pack collision warning is executed, the D gear is controlled to be unavailable. Controlling the D gear to be unavailable can prevent the vehicle from moving forward when there is a risk of battery pack collision, forcing the driver to pay attention to the warning information and take measures, effectively avoiding battery pack collision caused by misoperation and improving the driving safety of the vehicle.

[0011] Optionally, it further includes: When the vehicle is in the normal driving condition, the obstacle information in front of the vehicle is detected in real time; The height of the obstacle is compared with the ground clearance of the bumper; If the height of the obstacle is greater than or equal to the ground clearance of the bumper, the vehicle collision warning is executed. When the height of the obstacle may cause a collision with the vehicle bumper, executing the warning can remind the driver to take evasive measures in time, avoid vehicle collision accidents, and ensure the safety of the vehicle and passengers.

[0012] Optionally, when the vehicle collision warning is executed, it is determined in real time whether the collision risk between the vehicle and the obstacle is lifted. If not, when the collision risk value between the vehicle and the obstacle is greater than the first preset collision risk threshold, the vehicle actively executes a braking operation to avoid a collision between the vehicle and the obstacle. Judging the collision risk in real time and actively braking can automatically take measures to avoid collisions when the collision risk cannot be lifted in time by the driver's operation, improve the driving safety of the vehicle, and reduce accident losses.

[0013] Optionally, it further includes: When the vehicle is in the normal driving condition, if the height of the obstacle is less than the ground clearance of the bumper, the height of the obstacle is compared with the maximum ground clearance of the battery pack and the current ground clearance of the battery pack bottom plate; If the height of the obstacle is less than the maximum ground clearance of the battery pack but greater than or equal to the current ground clearance of the battery pack bottom plate, the height of the whole vehicle is increased so that the ground clearance of the battery pack bottom plate is greater than the height of the obstacle. During normal driving of the vehicle, when it is found that the obstacle may pose a threat to the battery pack, the height of the whole vehicle is promptly increased to ensure that the battery pack safely crosses the obstacle, avoid bottoming collisions, and ensure the safety and reliability of the battery pack.

[0014] Optionally, it further includes: Under normal driving conditions of the vehicle, if the height of the obstacle is less than the ground clearance of the bumper but greater than or equal to the maximum ground clearance of the battery pack, the second battery pack collision warning is executed. When the height of the obstacle exceeds the maximum ground clearance of the battery pack but is lower than the ground clearance of the bumper, a warning specifically for the battery pack is executed to remind the driver of the battery pack risk and prompt the driver to take corresponding measures to ensure the safety of the battery pack.

[0015] Optionally, when the second battery pack collision warning is executed, it is continuously determined whether the collision risk between the vehicle and the battery pack is eliminated. If not, when the collision risk value between the battery pack and the obstacle is greater than the second preset collision risk threshold, the vehicle actively performs a braking operation to avoid a collision between the battery pack bottom plate and the obstacle. Continuously determining the collision risk and actively braking when executing the second battery pack collision warning can automatically take measures to avoid a collision when the battery pack bottom plate is at risk of collision, further ensuring the safety of the battery pack and reducing losses caused by bottoming collisions.

[0016] In a second aspect, a system for actively preventing the battery pack from bottoming and colliding according to the present invention includes: A detection module for continuously detecting the obstacle information under the vehicle when the vehicle is in the pre-start state of parking, where the obstacle information includes the height of the obstacle; A judgment module for comparing the height of the obstacle detected by the detection module with the current ground clearance of the battery pack bottom plate and the maximum ground clearance of the battery pack, and judging whether the vehicle can pass the obstacle normally; An execution module for performing corresponding operations according to the determination result of the judgment module, specifically including: When the judgment module determines that the height of the obstacle is less than the current ground clearance of the battery pack bottom plate, controlling the vehicle to start and drive through normally; When the judgment module determines that the height of the obstacle is greater than or equal to the current ground clearance of the battery pack bottom plate but less than the maximum ground clearance of the battery pack, controlling the height of the whole vehicle to be increased so that the ground clearance of the battery pack bottom plate is greater than the height of the obstacle; When the judgment module determines that the height of the obstacle is greater than or equal to the maximum ground clearance of the battery pack, executing the first battery pack collision warning.

[0017] In a third aspect, a system for actively preventing a battery pack from hitting the ground during bottoming, according to the present invention, includes: A detection module, configured to detect, in real time, information on obstacles under the vehicle body and in front of the vehicle when the vehicle is in a pre-start state for parking and in a normal driving condition, where the obstacle information includes the height of the obstacle; A judgment module, configured to compare the height of the obstacle detected by the detection module with the current ground clearance of the battery pack, the maximum ground clearance of the battery pack, and the ground clearance of the bumper, and judge whether the vehicle can pass the obstacle normally; An execution module, configured to perform corresponding operations according to the determination result of the judgment module, specifically including: When the vehicle is in a pre-start state for parking, when the judgment module determines that the height of the obstacle is less than the current ground clearance of the battery pack, control the vehicle to start and drive normally through; when the judgment module determines that the height of the obstacle is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, control to raise the height of the whole vehicle so that the ground clearance of the battery pack is greater than the height of the obstacle; when the judgment module determines that the height of the obstacle is greater than or equal to the maximum ground clearance of the battery pack, execute a first battery pack collision warning; When the vehicle is in a normal driving condition, when the judgment module determines that the height of the obstacle is greater than or equal to the ground clearance of the bumper, execute a vehicle collision warning; when the judgment module determines that the height of the obstacle is less than the ground clearance of the bumper but greater than or equal to the maximum ground clearance of the battery pack, execute a second battery pack collision warning; when the judgment module determines that the height of the obstacle is less than the maximum ground clearance of the battery pack but greater than or equal to the current ground clearance of the battery pack, raise the height of the whole vehicle so that the ground clearance of the battery pack is greater than the height of the obstacle; when the judgment module determines that the height of the obstacle is less than the current ground clearance of the battery pack, control the vehicle to drive normally through.

[0018] In a fourth aspect, a vehicle according to the present invention employs the system for actively preventing a battery pack from hitting the ground during bottoming as described in the present invention.

[0019] Advantages of the present invention: When detecting the height of obstacles under the vehicle in real time during the pre-start of vehicle parking, it can perceive the potential risk of bottoming collision in advance. By comparing with the current ground clearance of the battery pack and the maximum ground clearance of the battery pack, the risk level is accurately evaluated to achieve intelligent decision-making. If the height of the obstacle is less than the current ground clearance of the battery pack, the vehicle starts normally to ensure the convenience of use; if the height of the obstacle is between the current ground clearance of the battery pack and the maximum ground clearance of the battery pack, the vehicle height is increased to ensure that the battery pack safely crosses the obstacle and avoid battery pack collision to ensure the safety and reliability of the battery pack; if the height of the obstacle is greater than or equal to the maximum ground clearance of the battery pack, a warning is executed to remind the driver to pay attention to the danger and prompt him to take measures to effectively avoid accidents. Overall, this method actively intervenes in the risk of battery pack collision, improves the safety and reliability of the vehicle under complex road conditions, reduces the risk of battery pack damage, and extends its service life. Description of the Drawings

[0020] Figure 1 It is a flowchart of the method for actively preventing the battery pack from bottoming collision in the embodiment of the present application (when the vehicle is in the pre-start state of parking); Figure 2 It is a flowchart of the method for actively preventing the battery pack from bottoming collision in the embodiment of the present application (under normal driving conditions of the vehicle); Figure 3 It is a schematic block diagram of the system for actively preventing the battery pack from bottoming collision in the embodiment of the present application; Figure 4 It is a schematic diagram of the installation positions of each sensor and the obstacle in the embodiment of the present application In the figure: 1. Detection module, 2. Judgment module, 3. Execution module, 4. Obstacle, 5. Battery pack, 6. Air suspension execution unit, 7. Underbody radar sensor, 8. Millimeter wave radar, 9. Front long-distance camera, 10. Lidar. Detailed Embodiment

[0021] The following will describe the embodiments of the present invention with reference to the drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0022] As Figure 1 shown, in the embodiment of the present application, a method for actively preventing the battery pack from bottoming collision includes the following steps: When the vehicle is in the parking pre-start state, the obstacle information under the vehicle is detected in real time, and the obstacle information includes the height of obstacle 4. The detected height of obstacle 4 is compared with the current battery pack height from the ground and the maximum battery pack height from the ground. If the height of obstacle 4 is less than the current battery pack height from the ground, the vehicle starts normally and drives through. If the height of obstacle 4 is greater than or equal to the current battery pack height from the ground, but less than the maximum battery pack height from the ground, the height of the entire vehicle is raised so that the height of battery pack 5 from the ground is greater than the height of obstacle 4. If the height of obstacle 4 is greater than or equal to the maximum battery pack height from the ground, the first battery pack collision warning is executed.

[0023] By detecting the height of obstacle 4 under the vehicle in real time during the pre-start of the vehicle parking, the potential risk of battery pack bottom collision can be sensed in advance. By comparing with the current battery pack height from the ground and the maximum battery pack height from the ground, the risk level can be accurately assessed to achieve intelligent decision-making. If the height of obstacle 4 is less than the current battery pack height from the ground, the vehicle starts normally to ensure ease of use; if the height of obstacle 4 is between the current battery pack height from the ground and the maximum battery pack height from the ground, the height of the entire vehicle is increased to ensure that the battery pack safely passes obstacle 4, avoids collision with battery pack 5, and ensures the safety and reliability of the battery pack; if the height of obstacle 4 is greater than or equal to the maximum ground clearance of the battery pack, an early warning is executed to remind the driver of the danger and prompt him to take measures to effectively avoid accidents. On the whole, this method actively intervenes in the risk of battery pack 5 collision, improves the safety and reliability of the vehicle under complex road conditions, reduces the risk of damage to battery pack 5, and extends its service life.

[0024] In a possible embodiment, when the first battery pack collision warning is executed, the D gear is controlled to be unavailable, and the driver is required to get off the vehicle for confirmation, and pass normally after clearing the obstacle, or drive normally after reversing in the R gear. By controlling the D gear to be unavailable, the vehicle can be prevented from continuing to move forward when there is a risk of battery pack collision, forcing the driver to pay attention to the warning information and take measures, effectively avoiding battery pack 5 collision due to misoperation, and improving the safety of vehicle driving.

[0025] like Figure 2 As shown, in a possible embodiment, a method for actively preventing a battery pack bottom from colliding further includes: Under normal driving conditions, the obstacle information in front of the vehicle is detected in real time. The height of obstacle 4 is compared with the height of the bumper from the ground. If the height of obstacle 4 is greater than or equal to the height of the bumper from the ground, a vehicle collision warning is executed. When the height of obstacle 4 may cause a collision with the vehicle bumper, the execution of the warning can remind the driver to take avoidance measures in time to avoid a collision accident and ensure the safety of the vehicle and passengers. Among them, the height of the bumper from the ground is greater than the maximum height of the battery pack from the ground.

[0026] In a possible embodiment, when performing vehicle collision warning, it is determined in real time whether the collision risk between the vehicle and the obstacle 4 is lifted. If not, when the collision risk value between the vehicle and the obstacle 4 is greater than the first preset collision risk threshold (obtained through test calibration), the vehicle actively performs a braking operation to avoid a collision between the vehicle and the obstacle 4. Determining the collision risk in real time and actively braking can automatically take measures to avoid a collision when the collision risk cannot be lifted in time by the driver's operation, improving the safety of vehicle driving and reducing accident losses.

[0027] As Figure 2 shown, in a possible embodiment, a method for actively preventing the battery pack from bottoming out and colliding further includes: Under normal vehicle driving conditions, if the height of the obstacle 4 is less than the ground clearance of the bumper, the height of the obstacle 4 is compared with the maximum ground clearance of the battery pack and the current ground clearance of the battery pack; if the height of the obstacle 4 is less than the maximum ground clearance of the battery pack but greater than or equal to the current ground clearance of the battery pack, the height of the whole vehicle is raised so that the ground clearance of the battery pack 5 is greater than the height of the obstacle 4. During normal vehicle driving, when it is found that the obstacle 4 may pose a threat to the battery pack 5, the height of the whole vehicle is raised in time to ensure that the battery pack 5 safely crosses the obstacle 4 and avoid the battery pack from bottoming out and colliding, ensuring the safety and reliability of the battery pack 5.

[0028] As Figure 2 shown, in a possible embodiment, a method for actively preventing the battery pack from bottoming out and colliding further includes: Under normal vehicle driving conditions, if the height of the obstacle 4 is less than the ground clearance of the bumper but greater than or equal to the maximum ground clearance of the battery pack, a second battery pack collision warning is executed. When the height of the obstacle 4 exceeds the maximum ground clearance of the battery pack but is lower than the ground clearance of the bumper, a warning specifically for the battery pack 5 is executed to remind the driver to pay attention to the risk of the battery pack 5 and prompt the driver to take corresponding measures to ensure the safety of the battery pack 5.

[0029] In a possible embodiment, when performing the second battery pack collision warning, it is determined in real time whether the collision risk between the vehicle and the battery pack 5 is lifted. If not, when the collision risk value between the battery pack 5 and the obstacle 4 is greater than the second preset collision risk threshold (obtained through test calibration), the vehicle actively performs a braking operation to avoid a collision between the battery pack 5 and the obstacle 4. When performing the second battery pack collision warning, determining the collision risk in real time and actively braking can automatically take measures to avoid a collision when the battery pack 5 is at risk of collision, further ensuring the safety of the battery pack and reducing losses caused by bottoming out and colliding.

[0030] As Figure 3As shown in the figure, in the embodiment of the present application, a system for actively preventing the bottom of the battery pack from colliding includes a detection module 1, a judgment module 2, and an execution module 3. The judgment module 2 is respectively connected to the detection module 1 and the execution module 3. The detection module 1 is used to detect the obstacle information under the vehicle body in real time when the vehicle is in the pre-start state of parking. The obstacle information includes the height of the obstacle 4. The judgment module 2 is used to compare the height of the obstacle detected by the detection module 1 with the current ground clearance of the battery pack and the maximum ground clearance of the battery pack, and judge whether the vehicle can pass the obstacle 4 normally. The execution module 3 is used to perform corresponding operations according to the judgment result of the judgment module 2, specifically including: When the judgment module 2 determines that the height of the obstacle 4 is less than the current ground clearance of the battery pack, control the vehicle to start and drive normally through. When the judgment module 2 determines that the height of the obstacle 4 is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, control to raise the height of the whole vehicle so that the ground clearance of the battery pack 5 is greater than the height of the obstacle 4. When the judgment module 2 determines that the height of the obstacle 4 is greater than or equal to the maximum ground clearance of the battery pack, execute the first battery pack collision warning.

[0031] Among them, the detection module 1 includes a vehicle bottom radar sensor 7. The vehicle bottom radar sensor 7 is installed at the bottom of the vehicle head and is used to detect the obstacle information under the vehicle body. The obstacle information at least includes the height of the obstacle 4.

[0032] In the system for actively preventing the bottom of the battery pack from colliding, the detection module 1 detects the height of the obstacle 4 under the vehicle body in real time when the vehicle is pre-started, perceives the risk in advance, and provides data for subsequent judgment. The judgment module 2 compares the height of the detected obstacle 4 with the ground clearance parameter of the battery pack, accurately judges whether the vehicle can pass the obstacle 4, and realizes intelligent decision-making. The execution module 3 performs corresponding operations according to the judgment result. If the height of the obstacle 4 is less than the current ground clearance of the battery pack, the vehicle starts normally to ensure the convenience of use; if it is between the current ground clearance of the battery pack and the maximum ground clearance of the battery pack, the height of the whole vehicle is raised to avoid the collision of the battery pack 5 and ensure its safety and reliability; if it is greater than or equal to the maximum ground clearance of the battery pack, a warning is executed to remind the driver to pay attention to the danger. Overall, the modules of the system for actively preventing the bottom of the battery pack from colliding work together, actively intervene in the risk of bottom collision, reduce the probability of battery pack damage, and extend the service life.

[0033] Such as Figure 3As shown, in a possible embodiment, a system for actively preventing a battery pack from hitting the ground includes a detection module 1, a judgment module 2, and an execution module 3. The judgment module 2 is respectively connected to the detection module 1 and the execution module 3. The detection module 1 is used to detect the obstacle information under the vehicle bottom and in front of the vehicle in real time when the vehicle is in the pre-start state of parking and normal driving conditions. The obstacle information includes the height of the obstacle 4. The judgment module 2 is used to compare the height of the obstacle 4 detected by the detection module 1 with the current ground clearance of the battery pack, the maximum ground clearance of the battery pack, and the ground clearance of the bumper, and judge whether the vehicle can pass the obstacle 4 normally. The execution module 3 is used to perform corresponding operations according to the judgment result of the judgment module 2, specifically including: When the vehicle is in the pre-start state of parking, when the judgment module 2 determines that the height of the obstacle 4 is less than the current ground clearance of the battery pack, control the vehicle to start and drive normally through; when the judgment module 2 determines that the height of the obstacle 4 is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, control to raise the height of the whole vehicle so that the ground clearance of the battery pack is greater than the height of the obstacle 4; when the judgment module 2 determines that the height of the obstacle 4 is greater than or equal to the maximum ground clearance of the battery pack, execute the first battery pack collision warning.

[0034] When the vehicle is in normal driving conditions, when the judgment module 2 determines that the height of the obstacle 4 is greater than or equal to the ground clearance of the bumper, execute the vehicle collision warning; when the judgment module 2 determines that the height of the obstacle 4 is less than the ground clearance of the bumper but greater than or equal to the maximum ground clearance of the battery pack, execute the second battery pack collision warning; when the judgment module 2 determines that the height of the obstacle 4 is less than the maximum ground clearance of the battery pack but greater than or equal to the current ground clearance of the battery pack, raise the height of the whole vehicle so that the ground clearance of the battery pack is greater than the height of the obstacle 4; when the judgment module 2 determines that the height of the obstacle 4 is less than the current ground clearance of the battery pack, control the vehicle to drive normally through.

[0035] As Figure 4 shown, the detection module 1 includes a vehicle bottom radar sensor 7, a millimeter wave radar 8, a lidar 10, and a front long-distance camera 9. Among them, the vehicle bottom radar sensor 7 is installed at the bottom of the vehicle head and is used to detect the obstacle information under the vehicle bottom. The obstacle information at least includes the height of the obstacle 4. The millimeter wave radar 8 is installed on the front bumper, and the front long-distance camera 9 is installed inside the vehicle and faces the windshield. The millimeter wave radar 8 and the front long-distance camera 9 are used to detect the obstacle information near the front of the vehicle. The lidar 10 is installed on the vehicle roof and is used to detect the obstacle information far in front of the vehicle.

[0036] In a system for actively preventing the bottom collision of a battery pack, the detection module 1 detects the height of the vehicle bottom and the obstacle 4 ahead in real time during pre-start and driving conditions, broadening the risk perception range and enhancing safety assurance. The judgment module 2 introduces multi-parameter comparisons such as the ground clearance of the bumper, the current ground clearance of the battery pack, and the maximum ground clearance of the battery pack, making the judgment more accurate and capable of comprehensively evaluating the vehicle's passing of the obstacle 4. The execution module 3 takes corresponding actions according to different working conditions and judgment results: during vehicle pre-start, it controls the vehicle to start normally, raise the height, or give a warning based on the relationship between the height of the obstacle 4 and the current ground clearance of the battery pack and the maximum ground clearance of the battery pack. During vehicle driving, it executes collision warning, raises the height, or drives normally based on the relationship between the height of the obstacle 4 and the ground clearance of the bumper, the current ground clearance of the battery pack, and the maximum ground clearance of the battery pack. This multi-condition and multi-parameter judgment and execution mechanism actively intervenes in the risk of bottom collision, effectively avoids the bottom collision of the battery pack, ensures the driving safety of the vehicle, reduces the risk of battery pack damage, extends the service life, and at the same time enhances the driving experience, allowing the driver to drive with confidence under different road conditions.

[0037] When it is necessary to raise the height of the whole vehicle, the system issues an instruction to raise the ground clearance of the whole vehicle to the air suspension execution unit 6, and the air suspension execution unit 6 raises the height of the whole vehicle based on the instruction to raise the ground clearance of the whole vehicle. After completion, the vehicle can pass through normally.

[0038] In the embodiment of the present application, the ground clearance of the bumper is greater than the maximum ground clearance of the battery pack. The current ground clearance of the battery pack is generally the standard ground clearance of the battery pack, and the maximum ground clearance of the battery pack is generally greater than the current ground clearance of the battery pack.

[0039] In the embodiment of the present application, a vehicle adopts the system for actively preventing the bottom collision of the battery pack as in the embodiment of the present application.

[0040] The above embodiments are preferred embodiments of the present invention. However, the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A method for actively preventing the bottom collision of a battery pack, characterized in that, Including the following steps: When the vehicle is in the pre-start parking state, detect the obstacle information under the vehicle bottom in real time, and the obstacle information includes the height of the obstacle (4); Compare the detected height of the obstacle (4) with the current ground clearance of the battery pack and the maximum ground clearance of the battery pack; If the height of the obstacle (4) is less than the current ground clearance of the battery pack, the vehicle starts normally and drives through; If the height of the obstacle (4) is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, raise the height of the whole vehicle so that the ground clearance of the battery pack (5) is greater than the height of the obstacle (4); If the height of the obstacle (4) is greater than or equal to the maximum ground clearance of the battery pack, execute the first battery pack collision warning.

2. The method for actively preventing the bottom collision of the battery pack according to claim 1, characterized in that When executing the first battery pack collision warning, control that the D gear is unavailable.

3. The method for actively preventing the battery pack from bottoming out and colliding according to claim 1, characterized in that, It also includes: When the vehicle is in the normal driving condition, detect the obstacle information in front of the vehicle in real time; Compare the height of the obstacle (4) with the ground clearance of the bumper; If the height of the obstacle (4) is greater than or equal to the ground clearance of the bumper, execute the vehicle collision warning.

4. The method for actively preventing the bottom collision of the battery pack according to claim 3, wherein When executing the vehicle collision warning, judge in real time whether the collision risk between the vehicle and the obstacle (4) is eliminated. If not, when the collision risk value between the vehicle and the obstacle (4) is greater than the first preset collision risk threshold, the vehicle actively executes the braking operation to avoid the vehicle colliding with the obstacle (4).

5. The method for actively preventing the battery pack from bottoming out and colliding according to claim 3, wherein It also includes: When the vehicle is in the normal driving condition, if the height of the obstacle (4) is less than the ground clearance of the bumper, compare the height of the obstacle (4) with the maximum ground clearance of the battery pack and the current ground clearance of the battery pack; If the height of the obstacle (4) is less than the maximum ground clearance of the battery pack but greater than or equal to the current ground clearance of the battery pack, raise the height of the whole vehicle so that the ground clearance of the battery pack (5) is greater than the height of the obstacle (4).

6. The method for actively preventing the bottom collision of the battery pack according to claim 5, wherein, It also includes: When the vehicle is in the normal driving condition, if the height of the obstacle (4) is less than the ground clearance of the bumper but greater than or equal to the maximum ground clearance of the battery pack, execute the second battery pack collision warning.

7. The method for actively preventing the bottom collision of the battery pack according to claim 6, wherein When executing the second battery pack collision warning, judge in real time whether the collision risk between the vehicle and the battery pack (5) is eliminated. If not, when the collision risk value between the battery pack (5) and the obstacle (4) is greater than the second preset collision risk threshold, the vehicle actively executes the braking operation to avoid the battery pack (5) colliding with the obstacle (4).

8. An active system for preventing the bottom collision of a battery pack, characterized in that, Including: A detection module (1) for detecting the obstacle information under the vehicle bottom in real time when the vehicle is in the pre-start parking state, and the obstacle information includes the height of the obstacle (4); A judgment module (2) for comparing the height of the obstacle (4) detected by the detection module (1) with the current ground clearance of the battery pack and the maximum ground clearance of the battery pack, and judging whether the vehicle can pass the obstacle (4) normally; An execution module (3) for performing corresponding operations according to the judgment result of the judgment module (2), specifically including: When the judgment module (2) determines that the height of the obstacle (4) is less than the current ground clearance of the battery pack, control the vehicle to start normally and drive through; When the judgment module (2) determines that the height of the obstacle (4) is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, it controls to raise the height of the whole vehicle so that the ground clearance of the battery pack (5) is greater than the height of the obstacle (4); When the judgment module (2) determines that the height of the obstacle (4) is greater than or equal to the maximum ground clearance of the battery pack, it executes the first battery pack collision warning.

9. An active system for preventing the bottom collision of a battery pack, characterized in that, Including: A detection module (1), which is used to detect the obstacle information under the vehicle bottom and in front of the vehicle in real time when the vehicle is in the pre-start state of parking and normal driving conditions. The obstacle information includes the height of the obstacle (4); A judgment module (2), which is used to compare the height of the obstacle (4) detected by the detection module (1) with the current ground clearance of the battery pack, the maximum ground clearance of the battery pack, and the ground clearance of the bumper, and judge whether the vehicle can pass the obstacle (4) normally; An execution module (3), which is used to perform corresponding operations according to the judgment result of the judgment module (2), specifically including: When the vehicle is in the pre-start state of parking, when the judgment module (2) determines that the height of the obstacle (4) is less than the current ground clearance of the battery pack, it controls the vehicle to start and drive normally through; when the judgment module (2) determines that the height of the obstacle (4) is greater than or equal to the current ground clearance of the battery pack but less than the maximum ground clearance of the battery pack, it controls to raise the height of the whole vehicle so that the ground clearance of the battery pack (5) is greater than the height of the obstacle (4); when the judgment module (2) determines that the height of the obstacle (4) is greater than or equal to the maximum ground clearance of the battery pack, it executes the first battery pack collision warning; When the vehicle is in normal driving conditions, when the judgment module (2) determines that the height of the obstacle (4) is greater than or equal to the ground clearance of the bumper, it executes a vehicle collision warning; when the judgment module (2) determines that the height of the obstacle (4) is less than the ground clearance of the bumper but greater than or equal to the maximum ground clearance of the battery pack, it executes the second battery pack collision warning; when the judgment module (2) determines that the height of the obstacle (4) is less than the maximum ground clearance of the battery pack but greater than or equal to the current ground clearance of the battery pack, it raises the height of the whole vehicle so that the ground clearance of the battery pack (5) is greater than the height of the obstacle (4); when the judgment module (2) determines that the height of the obstacle (4) is less than the current ground clearance of the battery pack, it controls the vehicle to drive normally through.

10. A vehicle, characterized in that Adopt the system for actively preventing the battery pack from bottoming and colliding as described in claim 8 or 9.

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