A Collision Adaptive Method and System for Power Batteries

Abstract

This application provides a collision adaptive method and system for power batteries. The system includes: a top cover, a housing matching the top cover, a battery module, a battery control unit, and a high-voltage unit disposed within the housing. The housing includes an outer frame, an inner frame, multiple motion units, and an upper frame of the housing. Each motion unit consists of a motion base and a motion mechanism. One side of the motion mechanism is a bottom ball, and the other side is a support. The bottom ball is movably disposed within a groove in the motion base that matches the bottom ball. Multiple motion bases from the motion units are arranged around the inner frame near the outer frame. A coil and a high-voltage wire are disposed in the motion base, and a permanent magnet is disposed within the bottom ball. The cavity space formed by the inner frame, outer frame, and upper frame of the housing accommodates the motion mechanism within the motion unit for movement. This embodiment can improve the safety protection of power batteries.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and in particular to a collision adaptive method and system for a power battery. Background Technology

[0002] With the rapid development of electric vehicles, their safety has become an increasingly important concern. It's common for electric vehicles to deform after collisions, affecting both the vehicle body and the battery. Compressed battery cells can easily lead to thermal runaway, potentially causing the battery to catch fire or explode. Once a battery explodes or catches fire, the lives and property of the vehicle's occupants are severely threatened. Therefore, the protection and safety of the battery in the event of a collision is of paramount importance for electric vehicles. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a collision adaptive method and system for power batteries to improve the safety protection of power batteries when electric vehicles encounter collisions.

[0004] In a first aspect, embodiments of this application provide a collision adaptive method for a power battery, the method being applied to a collision adaptive system for a power battery; the system includes: a top cover, a housing matching the top cover, a battery module and a battery control unit disposed within the housing, and a high-voltage unit; the housing includes an outer frame, an inner frame, multiple motion units, and an upper perimeter of the housing frame; each motion unit is composed of a motion base and a motion mechanism, one side of the motion mechanism being a bottom ball and the other side being a support; the bottom ball is movably disposed within a groove in the motion base that matches the bottom ball; the inner frame of the housing is arranged around the perimeter of the inner frame near the outer frame of the housing, with the motion bases of the multiple motion units arranged around it; each motion base contains a coil and a high-voltage wire, and the bottom ball contains a permanent magnet; the cavity space formed by the inner frame, the outer frame, and the upper perimeter of the housing frame is used to accommodate the motion mechanism in the motion unit for movement; the method includes:

[0005] The battery control unit receives the predicted collision location and predicted collision energy of the vehicle from the vehicle controller; wherein, the predicted collision location is predicted by the vehicle controller based on the received identification data before the electric vehicle collides; the identification data is collected by an identification system installed on the electric vehicle body; the predicted collision energy is predicted by the vehicle controller based on the relative speed between the electric vehicle and the object being collided with and the model of the electric vehicle;

[0006] The battery control unit predicts the predicted collision position of the box body on the outer frame of the box body and the predicted collision energy of the box body on the outer frame of the box body based on the predicted collision position and the predicted collision energy of the whole vehicle; wherein, the battery module, the battery control unit and the high voltage unit in the box body constitute the power battery;

[0007] The battery control unit determines the first collision area containing the predicted collision location of the housing in the outer frame of the housing based on the predicted collision location and the predicted collision energy of the housing, so as to determine the power unit located in the second collision area in the inner frame of the housing as the first power unit; wherein the first collision area and the second collision area are orthographic projections of each other on the side of the housing.

[0008] Based on the predicted collision location and the predicted collision energy of the housing, the battery control unit determines the first current required by the coil in the moving base of each first power unit, so as to send the first current required by each coil to the high voltage line in the corresponding first power unit.

[0009] The high-voltage line in the first power unit supplies current to the coil according to the first current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the first power unit, so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area.

[0010] In conjunction with the first aspect, this application provides a first possible implementation of the first aspect, wherein, after driving the permanent magnet in the first power unit to move the bottom ball towards the strongest magnetic force point according to the strongest magnetic force point in the coil, thereby changing the orientation of the bracket in the first power unit so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area, the method further includes:

[0011] When the electric vehicle is involved in a collision, the battery control unit receives the actual collision location and actual collision energy of the vehicle from the first collision sensor installed on the vehicle body.

[0012] The battery control unit predicts the actual collision location of the box body and the actual collision energy borne by the box body on the outer frame of the box body, based on the actual collision location and the actual collision energy of the vehicle.

[0013] The battery control unit determines the first collision area containing the predicted collision position of the box in the outer frame of the box according to the actual collision position and the actual collision energy of the box, so as to determine the power unit located in the second collision area in the inner frame of the box as the second power unit; wherein the first collision area and the second collision area are orthogonal projections of each other on the side of the box.

[0014] Based on the actual collision position and actual collision energy of the housing, the battery control unit determines the second current required by the coil in the motion base of each second power unit, so as to send the second current to the high voltage line in the corresponding second power unit.

[0015] The high-voltage line in the second power unit supplies current to the coil according to the second current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the second power unit drives the bottom ball to move towards the strongest magnetic force point, so as to adjust the orientation of the bracket in the second power unit, so that the orientation of the bracket in the second power unit is adjusted to the direction of the actual collision position of the box in the first collision area.

[0016] In conjunction with the first aspect, this application provides a second possible implementation of the first aspect, wherein, before the battery control unit receives the vehicle predicted collision location and vehicle predicted collision energy sent by the vehicle controller, the method further includes:

[0017] The battery control unit determines the target vehicle historical collision location and target vehicle historical collision energy with the highest number of collisions from the vehicle's historical collision locations and historical collision energies over a historical period.

[0018] The battery control unit determines the historical collision location of the target vehicle and the historical collision energy borne by the outer frame of the box body based on the historical collision location of the target vehicle and the historical collision energy of the target vehicle.

[0019] The battery control unit determines the first historical collision area containing the historical collision location in the outer frame of the housing based on the historical housing collision location and the historical housing collision energy, so as to determine the power unit located in the second historical collision area in the inner frame of the housing as the third power unit; wherein the first historical collision area and the second historical collision area are orthogonal projections of each other on the side of the housing;

[0020] Based on the historical box collision location and the historical box collision energy, the battery control unit determines the third current required by the coil in the motion base of each third power unit, so as to send the third current required by each coil to the high voltage line in its corresponding third power unit.

[0021] The high-voltage line in the third power unit supplies current to the coil according to the third current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the third power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the third power unit, so that the orientation of the bracket in the third power unit is the direction of the historical box collision position in the first historical collision area, and the changed orientation of the bracket in each third power unit is used as the initial orientation of the bracket in each third power unit.

[0022] In conjunction with the first aspect, this application provides a third possible implementation of the first aspect, wherein a damping structure or energy-absorbing material is further provided inside the bottom sphere; the damping structure is used to buffer the collision energy received by the inner frame of the box; and the energy-absorbing material is used to absorb the collision energy received by the inner frame of the box.

[0023] In conjunction with the first aspect, this application provides a fourth possible implementation of the first aspect, wherein a target number of reinforcing ribs are provided around the inner frame of the box, one end of the reinforcing rib abuts against the inner side of the outer frame of the box, and the other end is provided on the outer side of the inner frame of the box.

[0024] In conjunction with the first aspect, this application provides a fifth possible implementation of the first aspect, wherein a plurality of the motion units are arranged at the bottom of the inner frame of the box near the outer frame of the box; and a second collision sensor is provided at the bottom of the electric vehicle;

[0025] When the battery control unit receives the actual collision location and actual collision energy of the vehicle underside sent by the second collision sensor, it predicts the collision location and collision energy of the bottom of the box body at the bottom of the outer frame of the box body based on the actual collision location and actual collision energy of the vehicle underside.

[0026] The battery control unit determines a first bottom collision area containing the bottom collision location of the box based on the bottom collision location and the bottom collision energy of the box, and determines the power unit located in the second bottom collision area of ​​the bottom of the inner frame of the box as the fourth power unit; the first bottom collision area and the second bottom collision area are orthographic projections of each other on the side of the box.

[0027] Based on the collision position and collision energy at the bottom of the housing, the battery control unit determines the fourth current required by the coil in the motion base of each fourth power unit, so as to send each fourth current to the high-voltage line in its corresponding fourth power unit.

[0028] The high-voltage line in the fourth power unit provides current to the coil according to the fourth current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the fourth power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the fourth power unit, so that the orientation of the bracket in the fourth power unit is the direction of the bottom collision position of the box in the first box bottom collision area.

[0029] In conjunction with the first aspect, this application provides a sixth possible implementation of the first aspect, wherein the internal structure of the support in the motion mechanism is any one of the following structures: solid structure, hollow structure, hollow multi-cavity structure.

[0030] In conjunction with the first aspect, this application provides a seventh possible implementation of the first aspect, wherein the identification system is radar and the identification data is radar data;

[0031] Alternatively, the recognition system may be a visual recognition system, and the recognition data may be image data or video data.

[0032] Secondly, this application also provides a collision adaptive system for a power battery. The system includes: a top cover, a housing matching the top cover, a battery module and a battery control unit disposed within the housing, and a high-voltage unit. The housing includes an outer frame, an inner frame, multiple motion units, and an upper frame of the housing. Each motion unit consists of a motion base and a motion mechanism. One side of the motion mechanism is a bottom ball, and the other side is a support. The bottom ball is movably disposed within a groove in the motion base that matches the bottom ball. The inner frame of the housing has multiple motion bases arranged around its perimeter near the outer frame of the housing. Each motion base contains a coil and a high-voltage wire, and the bottom ball contains a permanent magnet. The cavity formed by the inner frame, the outer frame, and the upper frame of the housing is used to accommodate the motion mechanism in the motion unit for movement.

[0033] The battery control unit is used for:

[0034] The system receives the predicted collision location and predicted collision energy of the vehicle from the vehicle controller. The predicted collision location is predicted by the vehicle controller based on received identification data before the electric vehicle collides. The identification data is collected by an identification system installed on the electric vehicle body. The predicted collision energy is predicted by the vehicle controller based on the relative speed between the electric vehicle and the object being collided with, as well as the model of the electric vehicle.

[0035] Based on the predicted collision location and predicted collision energy of the whole vehicle, the predicted collision location of the box body on the outer frame of the box body and the predicted collision energy of the box body borne by the outer frame of the box body are predicted; wherein, the battery module, the battery control unit and the high voltage unit in the box body constitute the power battery;

[0036] Based on the predicted collision position and the predicted collision energy of the box, a first collision area containing the predicted collision position of the box is determined in the outer frame of the box, so that the power unit located in the second collision area in the inner frame of the box is determined as the first power unit; wherein, the first collision area and the second collision area are orthographic projections of each other on the side of the box.

[0037] Based on the predicted collision location and the predicted collision energy of the box, the first current required by the coil in the motion base of each first power unit is determined, so as to send the first current required by each coil to the high voltage line in the corresponding first power unit.

[0038] The high-voltage line in the first power unit is used to supply current to the coil according to the first current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the first power unit, so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area.

[0039] In conjunction with the second aspect, this application provides a first possible implementation of the second aspect, wherein the battery control unit is further configured to:

[0040] When the electric vehicle is involved in a collision, it receives the actual collision location and actual collision energy of the vehicle from the first collision sensor installed on the vehicle body.

[0041] Based on the actual collision location and the actual collision energy of the vehicle, the actual collision location of the box body on the outer frame of the box body and the actual collision energy of the box body borne by the outer frame of the box body are predicted.

[0042] Based on the actual collision position and actual collision energy of the box, a first collision area containing the predicted collision position of the box is determined in the outer frame of the box, so as to determine the power unit located in the second collision area in the inner frame of the box as the second power unit; wherein, the first collision area and the second collision area are orthographic projections of each other on the side of the box;

[0043] Based on the actual collision position and actual collision energy of the box, the second current required by the coil in the motion base of each second power unit is determined so as to send the second current to the high voltage line in the corresponding second power unit.

[0044] The high-voltage line in the second power unit is used to supply current to the coil according to the second current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the second power unit drives the bottom ball to move towards the strongest magnetic force point, so as to adjust the orientation of the bracket in the second power unit, so that the orientation of the bracket in the second power unit is adjusted to the direction of the actual collision position of the box in the first collision area.

[0045] This application provides a collision adaptive method and system for a power battery. The battery module, battery management system, and high-voltage unit to be protected are housed within a housing. Multiple motion bases from motion units are arranged around the inner frame of the housing near the outer frame. A bottom ball on the motion mechanism of each motion unit is movably positioned within the motion base. A coil and a high-voltage wire are installed in the motion base, and a permanent magnet is installed inside the bottom ball. Before a collision occurs, the vehicle first predicts the predicted collision location and energy of the outer frame of the vehicle body. Then, a first collision zone containing the predicted collision location is determined within the outer frame. The power unit located in the second collision zone within the inner frame is designated as the first power unit. The first and second collision zones are orthographically projected onto the side of the vehicle body. Based on the predicted collision location and energy, a first current is determined for the coil in the moving base of each first power unit. This first current is then sent to the high-voltage line in the first power unit. The high-voltage line in the first power unit provides current to the coil according to the first current, causing the coil to generate magnetic force. Based on the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, thereby changing the orientation of the support in the first power unit. In this way, when the housing collides, since the bracket in the first power unit is oriented in the direction of the predicted collision location of the housing, the actual collision energy received by the actual collision location of the housing can be dispersed to the entire second collision area on the inner frame of the housing through the bracket in the first power unit. This reduces the actual collision energy received by the actual collision location on the inner frame of the housing (the actual collision location is generally a location in the second collision area), which helps to reduce the damage to the actual collision location on the inner frame of the housing. This can protect the safety of the power battery (including battery modules, battery management system and high voltage unit) in the inner frame of the housing, and achieve the purpose of safety protection for the power battery.

[0046] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A schematic diagram of the structure of a collision adaptive system for a power battery provided in an embodiment of this application is shown;

[0049] Figure 2 This paper shows a schematic diagram of the structure of a box provided in an embodiment of this application;

[0050] Figure 3 A schematic diagram of a single power unit provided in an embodiment of this application is shown;

[0051] Figure 4 A schematic diagram of the internal structure of a power unit provided in an embodiment of this application is shown;

[0052] Figure 5 This illustration shows a schematic diagram of changing the orientation of the bracket in the first power unit according to an embodiment of this application. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0054] Considering that the explosion or fire of a power battery would severely threaten the lives and property of vehicle occupants, the safety of the power battery in the event of a collision is of paramount importance for electric vehicles. Based on this, this application provides a collision adaptive method and system for power batteries, which will be described below through embodiments.

[0055] To facilitate understanding of this embodiment, a collision adaptive method for a power battery disclosed in this application will first be described in detail. This method is applied to a collision adaptive system for a power battery; such as... Figure 1 As shown, the system includes: a top cover 500, a housing 100 that matches the top cover 500, a battery module 200 and a battery control unit 300 disposed within the housing 100, and a high-voltage unit 400. Figure 2 As shown, the housing 100 includes an outer frame 110, an inner frame 120, multiple motion units 140, and an upper frame 130. Figure 3 and Figure 4As shown, the motion unit 140 consists of a motion base 141 and a motion mechanism 142. One side of the motion mechanism 142 is a bottom ball 142-1, and the other side is a support 142-2. The bottom ball 142-1 is movably disposed in a groove in the motion base 141 that matches the bottom ball 142-1. Figure 2 As shown, multiple motion bases 141 of motion units 140 are arranged around the perimeter of the inner frame 120 near the outer frame 110. The motion bases 141 contain coils and high-voltage wires, and the bottom ball 142-1 contains a permanent magnet. The cavity formed by the inner frame 120, the outer frame 110, and the upper perimeter 130 of the frame is used to accommodate the motion mechanisms 142 of the motion units 140 for movement.

[0056] The method includes the following steps S101-S105:

[0057] S101: The battery control unit receives the vehicle's predicted collision location and predicted collision energy from the vehicle controller; wherein, the vehicle's predicted collision location is predicted by the vehicle controller based on the received identification data before the electric vehicle collides; the identification data is collected by the identification system installed on the electric vehicle body; the vehicle's predicted collision energy is predicted by the vehicle controller based on the relative speed between the electric vehicle and the object being collided with and the model of the electric vehicle.

[0058] In this embodiment, an identification system is installed on the vehicle body. This system collects identification data and sends it to the vehicle controller. In one possible implementation, the identification system is radar, and the identification data is radar data; alternatively, the identification system is a visual identification system, and the identification data is image data or video data.

[0059] After receiving the identification data, the vehicle controller predicts the predicted collision location of the electric vehicle based on the identification data, and predicts the predicted collision energy based on the relative speed between the electric vehicle and the object being collided with, as well as the vehicle model. The predicted collision energy refers to the force of the collision experienced by the vehicle. The predicted collision location and predicted collision energy are then sent to the battery control unit 300.

[0060] S102: The battery control unit predicts the predicted collision position of the box body on the outer frame and the predicted collision energy of the box body on the outer frame, based on the predicted collision position and predicted collision energy of the whole vehicle; wherein, the battery module, battery control unit and high voltage unit in the box body constitute the power battery.

[0061] In this embodiment, the power battery that needs to be protected specifically includes the battery module 200, the battery control unit 300, and the high-voltage unit 400.

[0062] When an electric vehicle is involved in a collision, the power battery is also affected. In this embodiment, based on the predicted collision location and predicted collision energy of the entire vehicle, the predicted collision location of the outer frame 110 and the predicted collision energy borne by the outer frame 110 are predicted. The predicted collision energy refers to the force of the collision experienced by the outer frame 110.

[0063] S103: The battery control unit determines a first collision area containing the predicted collision location of the housing in the outer frame of the housing based on the predicted collision location and the predicted collision energy of the housing, so as to determine the power unit located in the second collision area in the inner frame of the housing as the first power unit; wherein the first collision area and the second collision area are orthogonal projections of each other on the side of the housing.

[0064] In this embodiment, a first collision region containing the predicted collision position is determined within the outer frame 110 of the housing based on the predicted collision position and energy of the housing. That is, the first collision region is located on the side of the outer frame 110. A second collision region is determined based on the first collision region. The first and second collision regions being orthographically projected onto the side of the housing means that they are parallel and equal in size. If the side of the outer frame 110 coincides with the side of the inner frame 120, then the first and second collision regions coincide.

[0065] S104: The battery control unit determines the first current required by the coil in the moving base of each first power unit based on the predicted collision position and the predicted collision energy of the housing, so as to send the first current required by each coil to the high voltage line in its corresponding first power unit.

[0066] For example, after determining the first current required by the coil in the moving base of the first power unit (e.g., a1), the first current is sent to the high-voltage line in the moving base of the first power unit (a1).

[0067] S105: The high-voltage line in the first power unit provides current to the coil according to the first current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the first power unit, so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area.

[0068] For example, the high-voltage wire in the moving base of the first power unit (a1) supplies current to the coil in the moving base of the first power unit (a1) according to the first current. After receiving the current, the coil generates magnetic force. Based on the strongest magnetic force point in the coil, the permanent magnet in the bottom ball of the first power unit (a1) is driven to move the bottom ball towards the strongest magnetic force point, thereby changing the orientation of the bracket in the first power unit (a1). Figure 5 As shown, by adjusting the orientation of the bracket 142-2 in each of the first power units in the second collision area to point towards the direction of the predicted collision position of the box on the outer frame of the box, the actual collision energy received by the actual collision position on the inner frame of the box is dispersed by the first power units when a collision occurs.

[0069] In one possible implementation, after performing step S105, the method may further perform the following steps:

[0070] S106: When an electric vehicle is involved in a collision, the battery control unit receives the actual collision location and actual collision energy of the vehicle from the first collision sensor located on the vehicle body.

[0071] In this embodiment, a first collision sensor is installed on the electric vehicle. The first collision sensor is used to collect the actual collision location and the actual collision energy of the vehicle when a collision occurs, and then send the collected actual collision location and the actual collision energy of the vehicle to the battery control unit.

[0072] S107: The battery control unit predicts the actual collision location of the box body and the actual collision energy borne by the box body on the outer frame of the box body, based on the actual collision location and actual collision energy of the whole vehicle.

[0073] S108: The battery control unit determines a first collision area containing the predicted collision position of the box in the outer frame of the box based on the actual collision position and the actual collision energy of the box, so as to determine the power unit located in the second collision area in the inner frame of the box as the second power unit; wherein the first collision area and the second collision area are orthogonal projections of each other on the side of the box.

[0074] In this embodiment, the first collision area and the first collision area have a certain degree of overlap, and the second collision area and the second collision area have a certain degree of overlap. The first power unit and the second power unit also have a certain degree of overlap.

[0075] S109: The battery control unit determines the second current required by the coil in the motion base of each second power unit based on the actual collision position and the actual collision energy of the housing, so as to send the second current to the high voltage line in the corresponding second power unit.

[0076] S1010: The high-voltage line in the second power unit supplies current to the coil according to the second current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the second power unit drives the bottom ball to move towards the strongest magnetic force point, so as to adjust the orientation of the bracket in the second power unit, so that the orientation of the bracket in the second power unit is adjusted to the direction of the actual collision position of the box in the first collision area.

[0077] In this embodiment, when the electric vehicle is about to collide, the orientation of the bracket in the first power unit in the second collision area on the inner frame 120 of the box is adjusted in advance. Then, when the electric vehicle collides, the second collision area is corrected to obtain the second collision area, and the first power unit is corrected to obtain the second power unit. By further adjusting the orientation of the bracket in the second power unit in the second collision area on the inner frame 120 of the box, the orientation of the bracket in the second power unit can be made more accurate, and it can better resist the collision received by the inner frame 120 of the box.

[0078] In one possible implementation, before performing step S101, the initial orientation of the support in the power unit can be predetermined through the following steps S201-S205:

[0079] S201: The battery control unit determines the target vehicle historical collision location and target vehicle historical collision energy with the highest number of collisions from the vehicle's historical collision locations and historical collision energies within a historical time period.

[0080] S202: The battery control unit determines the historical collision location and the historical collision energy borne by the outer frame of the battery box based on the historical collision location and historical collision energy of the target vehicle.

[0081] S203: The battery control unit determines the first historical collision area containing the historical collision location in the outer frame of the housing based on the historical housing collision location and the historical housing collision energy, so as to determine the power unit located in the second historical collision area in the inner frame of the housing as the third power unit; wherein, the first historical collision area and the second historical collision area are orthogonal projections of each other on the side of the housing.

[0082] S204: Based on the historical box collision location and historical box collision energy, the battery control unit determines the third current required by the coil in the motion base of each third power unit, so as to send the third current required by each coil to the high voltage line in its corresponding third power unit.

[0083] S205: The high-voltage line in the third power unit supplies current to the coil according to the third current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the third power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the support in the third power unit, so that the orientation of the support in the third power unit is the direction of the historical box collision position in the first historical collision area, and the changed orientation of the support in each third power unit is used as the initial orientation of the support in each third power unit.

[0084] In this embodiment, based on the historical collision location and historical collision energy of the target vehicle with the highest number of collisions in a historical time period, the historical collision location and historical collision energy of the box body with the highest number of collisions on the outer frame of the box body are derived. The motion unit determines the initial orientation of the bracket and maintains the initial position based on this information, ensuring that the power unit is likely to run the shortest stroke and respond the fastest when a collision occurs, thus quickly resisting the impact force.

[0085] In one possible implementation, a damping structure or energy-absorbing material is also provided inside the bottom sphere; the damping structure is used to buffer the collision energy received by the inner frame of the box; the energy-absorbing material is used to absorb the collision energy received by the inner frame of the box.

[0086] In this embodiment, the collision energy is buffered by energy-absorbing materials or damping structures, thereby weakening the energy (force) transmitted to the frame 120 inside the box.

[0087] In one possible implementation, a target number of reinforcing ribs are provided around the inner frame of the box, with one end of the reinforcing rib abutting against the inner side of the outer frame of the box and the other end located on the outer side of the inner frame of the box.

[0088] like Figure 2 As shown, a reinforcing rib is provided around each of the four sides of the inner frame of the box. In this embodiment, by providing a target number of reinforcing ribs around the inner frame of the box, it is beneficial to enhance the resistance of the inner and outer frames of the box to collision energy.

[0089] In one possible implementation, multiple motion units are arranged at the bottom of the inner frame of the box near the outer frame of the box; a second collision sensor is installed at the bottom of the electric vehicle. In this embodiment, the following methods S301-S304 can also be used to protect the undercarriage from collisions:

[0090] S301: When the battery control unit receives the actual collision location and actual collision energy of the vehicle underside sent by the second collision sensor, it predicts the collision location and collision energy of the bottom of the box body at the bottom of the outer frame of the box body based on the actual collision location and actual collision energy of the vehicle underside.

[0091] In this embodiment, the second collision sensor is used to collect the actual collision location and energy under the vehicle, and then sends these data to the battery control unit. Based on the actual collision location and energy under the vehicle, the battery control unit predicts the collision location and energy at the bottom of the outer frame of the enclosure.

[0092] S302: The battery control unit determines the first bottom collision area of ​​the box body, which includes the bottom collision location of the box body, at the bottom of the outer frame of the box body, based on the collision location and energy of the bottom collision of the box body. The power unit located in the second bottom collision area of ​​the box body at the bottom of the inner frame of the box body is determined as the fourth power unit. The first bottom collision area and the second bottom collision area of ​​the box body are orthogonal projections of each other on the side of the box body.

[0093] In this embodiment, the first box bottom collision area is located at the bottom of the outer frame of the box, and the second box bottom collision area is located at the bottom of the inner frame of the box. The first box bottom collision area and the second box bottom collision area are parallel and the same size. When the bottom of the outer frame of the box and the bottom of the inner frame of the box coincide, the first box bottom collision area and the second box bottom collision area coincide.

[0094] S303: The battery control unit determines the fourth current required by the coil in the motion base of each fourth power unit based on the collision position and collision energy at the bottom of the housing, so as to send each fourth current to the high-voltage line in its corresponding fourth power unit.

[0095] S304: The high-voltage line in the fourth power unit provides current to the coil according to the fourth current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the fourth power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the fourth power unit, so that the orientation of the bracket in the fourth power unit is the direction of the bottom collision position of the box in the first box bottom collision area.

[0096] In this way, the fourth power unit can disperse the impact of protrusions on the bottom of the vehicle body.

[0097] In one possible implementation, the internal structure of the support in the motion mechanism is any one of the following: solid structure, hollow structure, or hollow multi-cavity structure.

[0098] In one possible implementation, the bottom sphere can also be filled with a non-Newtonian fluid to meet the requirements of being lightweight, high-strength, and impact-resistant.

[0099] Based on the same technical concept, this application also provides a collision adaptive system for a power battery. The system includes: a top cover, a housing that matches the top cover, a battery module and a battery control unit disposed within the housing, and a high-voltage unit. The housing includes an outer frame, an inner frame, multiple motion units, and an upper frame of the housing. Each motion unit consists of a motion base and a motion mechanism. One side of the motion mechanism is a bottom ball, and the other side is a support. The bottom ball is movably disposed within a groove in the motion base that matches the bottom ball. The inner frame of the housing has multiple motion bases arranged around its perimeter near the outer frame of the housing. Each motion base contains a coil and a high-voltage wire, and the bottom ball contains a permanent magnet. The cavity formed by the inner frame, the outer frame, and the upper frame of the housing is used to accommodate the motion mechanism in the motion unit for movement.

[0100] The battery control unit is used for:

[0101] The system receives the predicted collision location and predicted collision energy of the vehicle from the vehicle controller. The predicted collision location is predicted by the vehicle controller based on received identification data before the electric vehicle collides. The identification data is collected by an identification system installed on the electric vehicle body. The predicted collision energy is predicted by the vehicle controller based on the relative speed between the electric vehicle and the object being collided with, as well as the model of the electric vehicle.

[0102] Based on the predicted collision location and predicted collision energy of the whole vehicle, the predicted collision location of the box body on the outer frame of the box body and the predicted collision energy of the box body borne by the outer frame of the box body are predicted; wherein, the battery module, the battery control unit and the high voltage unit in the box body constitute the power battery;

[0103] Based on the predicted collision position and the predicted collision energy of the box, a first collision area containing the predicted collision position of the box is determined in the outer frame of the box, so that the power unit located in the second collision area in the inner frame of the box is determined as the first power unit; wherein, the first collision area and the second collision area are orthographic projections of each other on the side of the box.

[0104] Based on the predicted collision location and the predicted collision energy of the box, the first current required by the coil in the motion base of each first power unit is determined, so as to send the first current required by each coil to the high voltage line in the corresponding first power unit.

[0105] The high-voltage line in the first power unit is used to supply current to the coil according to the first current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the first power unit, so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area.

[0106] Optionally, the battery control unit is further configured to:

[0107] When the electric vehicle is involved in a collision, it receives the actual collision location and actual collision energy of the vehicle from the first collision sensor installed on the vehicle body.

[0108] Based on the actual collision location and the actual collision energy of the vehicle, the actual collision location of the box body on the outer frame of the box body and the actual collision energy of the box body borne by the outer frame of the box body are predicted.

[0109] Based on the actual collision position and actual collision energy of the box, a first collision area containing the predicted collision position of the box is determined in the outer frame of the box, so as to determine the power unit located in the second collision area in the inner frame of the box as the second power unit; wherein, the first collision area and the second collision area are orthographic projections of each other on the side of the box;

[0110] Based on the actual collision position and actual collision energy of the box, the second current required by the coil in the motion base of each second power unit is determined so as to send the second current to the high voltage line in the corresponding second power unit.

[0111] The high-voltage line in the second power unit is used to supply current to the coil according to the second current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the second power unit drives the bottom ball to move towards the strongest magnetic force point, so as to adjust the orientation of the bracket in the second power unit, so that the orientation of the bracket in the second power unit is adjusted to the direction of the actual collision position of the box in the first collision area.

[0112] Optionally, the battery control unit is further configured to:

[0113] From the historical collision locations and historical collision energies of the electric vehicles within the historical time period, the target historical collision location and target historical collision energy with the highest number of collisions were determined.

[0114] Based on the historical collision location and historical collision energy of the target vehicle, the historical collision location of the box body and the historical collision energy borne by the outer frame of the box body are determined on the outer frame of the box body.

[0115] Based on the historical collision location and the historical collision energy of the housing, a first historical collision area containing the historical collision location is determined in the outer frame of the housing, so that the power unit located in the second historical collision area in the inner frame of the housing is determined as the third power unit; wherein, the first historical collision area and the second historical collision area are orthographic projections of each other on the side of the housing;

[0116] Based on the historical box collision location and the historical box collision energy, the third current required by the coil in the motion base of each third power unit is determined, so as to send the third current required by each coil to the high voltage line in its corresponding third power unit.

[0117] The high-voltage line in the third power unit is used to supply current to the coil according to the third current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the third power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the third power unit, so that the orientation of the bracket in the third power unit is the direction of the historical box collision position in the first historical collision area, and the changed orientation of the bracket in each third power unit is used as the initial orientation of the bracket in each third power unit.

[0118] Optionally, the bottom sphere may also be provided with a damping structure or an energy-absorbing material; the damping structure is used to buffer the collision energy received by the inner frame of the box; the energy-absorbing material is used to absorb the collision energy received by the inner frame of the box.

[0119] Optionally, a target number of reinforcing ribs are provided around the inner frame of the box, with one end of the reinforcing rib abutting against the inner side of the outer frame of the box and the other end located on the outer side of the inner frame of the box.

[0120] Optionally, a plurality of motion units are arranged at the bottom of the inner frame of the box near the outer frame of the box; a second collision sensor is provided at the bottom of the electric vehicle;

[0121] The battery control unit is also used for:

[0122] Upon receiving the actual collision location and actual collision energy of the vehicle underside sent by the second collision sensor, the collision location and collision energy of the bottom of the box body at the bottom of the outer frame of the box body are predicted based on the actual collision location and actual collision energy of the vehicle underside.

[0123] Based on the collision position and collision energy at the bottom of the box, a first collision area at the bottom of the box, including the collision position at the bottom of the box, is determined at the bottom of the outer frame of the box. The power unit located in the second collision area at the bottom of the inner frame of the box is determined as the fourth power unit. The first collision area at the bottom of the box and the second collision area at the bottom of the box are orthographic projections of each other on the side of the box.

[0124] Based on the collision location and collision energy at the bottom of the housing, the fourth current required by the coil in the motion base of each fourth power unit is determined so as to send each fourth current to the high voltage line in its corresponding fourth power unit.

[0125] The high-voltage line in the fourth power unit is used to supply current to the coil according to the fourth current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the fourth power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the fourth power unit, so that the orientation of the bracket in the fourth power unit is the direction of the bottom collision position of the box in the first box bottom collision area.

[0126] Optionally, the internal structure of the support in the motion mechanism is any one of the following structures: solid structure, hollow structure, or hollow multi-cavity structure.

[0127] Optionally, the identification system is radar, and the identification data is radar data;

[0128] Alternatively, the recognition system may be a visual recognition system, and the recognition data may be image data or video data.

[0129] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the system described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0130] In the several embodiments provided in this application, it should be understood that the disclosed systems and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0131] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0132] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0133] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0134] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A collision adaptive method for a power battery, characterized in that, The method is applied to a collision adaptive system for a power battery; the system includes: a top cover, a housing matching the top cover, a battery module and a battery control unit disposed within the housing, and a high-voltage unit; the housing includes an outer frame, an inner frame, multiple motion units, and an upper frame of the housing; each motion unit consists of a motion base and a motion mechanism, one side of the motion mechanism being a bottom ball and the other side a support; the bottom ball is movably disposed within a groove in the motion base that matches the bottom ball; the inner frame of the housing has multiple motion bases arranged around its perimeter near the outer frame of the housing; each motion base contains a coil and a high-voltage wire, and the bottom ball contains a permanent magnet; the cavity space formed by the inner frame, the outer frame, and the upper frame of the housing is used to accommodate the motion mechanism in the motion unit for movement; the method includes: The battery control unit receives the predicted collision location and predicted collision energy of the vehicle from the vehicle controller; wherein, the predicted collision location is predicted by the vehicle controller based on the received identification data before the electric vehicle collides; the identification data is collected by an identification system installed on the electric vehicle body; the predicted collision energy is predicted by the vehicle controller based on the relative speed between the electric vehicle and the object being collided with and the model of the electric vehicle; The battery control unit predicts the predicted collision position of the box body on the outer frame of the box body and the predicted collision energy of the box body on the outer frame of the box body based on the predicted collision position and the predicted collision energy of the whole vehicle; wherein, the battery module, the battery control unit and the high voltage unit in the box body constitute the power battery; The battery control unit determines a first collision area containing the predicted collision location of the housing in the outer frame of the housing based on the predicted collision location and the predicted collision energy of the housing, so as to determine the power unit located in the second collision area in the inner frame of the housing as the first power unit; wherein the first collision area and the second collision area are orthographic projections of each other on the side of the housing. Based on the predicted collision location and the predicted collision energy of the housing, the battery control unit determines the first current required by the coil in the moving base of each first power unit, so as to send the first current required by each coil to the high voltage line in the corresponding first power unit. The high-voltage line in the first power unit supplies current to the coil according to the first current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the first power unit, so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area.

2. The method according to claim 1, characterized in that, After driving the permanent magnet in the first power unit to move the bottom ball towards the strongest magnetic force point according to the strongest magnetic force point in the coil, thereby changing the orientation of the bracket in the first power unit so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area, the method further includes: When the electric vehicle is involved in a collision, the battery control unit receives the actual collision location and actual collision energy of the vehicle from the first collision sensor installed on the vehicle body. The battery control unit predicts the actual collision location of the box body and the actual collision energy borne by the box body on the outer frame of the box body, based on the actual collision location and the actual collision energy of the vehicle. The battery control unit determines a first collision area containing the predicted collision position of the housing in the outer frame of the housing based on the actual collision position and the actual collision energy of the housing, so as to identify the power unit located in the second collision area in the inner frame of the housing as the second power unit; wherein the first collision area and the second collision area are orthogonal projections of each other on the side of the housing. Based on the actual collision position and actual collision energy of the housing, the battery control unit determines the second current required by the coil in the motion base of each second power unit, so as to send the second current to the high voltage line in the corresponding second power unit. The high-voltage line in the second power unit supplies current to the coil according to the second current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the second power unit drives the bottom ball to move towards the strongest magnetic force point, so as to adjust the orientation of the bracket in the second power unit, so that the orientation of the bracket in the second power unit is adjusted to the direction of the actual collision position of the box in the first collision area.

3. The method according to claim 1, characterized in that, Before the battery control unit receives the predicted collision location and predicted collision energy from the vehicle controller, the method further includes: The battery control unit determines the target vehicle historical collision location and target vehicle historical collision energy with the highest number of collisions from the vehicle's historical collision locations and historical collision energies over a historical period. The battery control unit determines the historical collision location of the target vehicle and the historical collision energy borne by the outer frame of the box body based on the historical collision location of the target vehicle and the historical collision energy of the target vehicle. The battery control unit determines a first historical collision area containing the historical collision location within the outer frame of the housing based on the historical housing collision location and the historical housing collision energy, so as to identify the power unit located in the second historical collision area within the inner frame of the housing as the third power unit; wherein the first historical collision area and the second historical collision area are orthographic projections of each other on the side of the housing. Based on the historical box collision location and the historical box collision energy, the battery control unit determines the third current required by the coil in the motion base of each third power unit, so as to send the third current required by each coil to the high voltage line in its respective third power unit. The high-voltage line in the third power unit supplies current to the coil according to the third current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the third power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the third power unit, so that the orientation of the bracket in the third power unit is the direction of the historical box collision position in the first historical collision area, and the changed orientation of the bracket in each third power unit is used as the initial orientation of the bracket in each third power unit.

4. The method according to claim 1, characterized in that, The bottom sphere is also provided with a damping structure or energy-absorbing material; the damping structure is used to buffer the collision energy received by the inner frame of the box; the energy-absorbing material is used to absorb the collision energy received by the inner frame of the box.

5. The method according to claim 1, characterized in that, The inner frame of the box is provided with a target number of reinforcing ribs around its perimeter. One end of each reinforcing rib abuts against the inner side of the outer frame of the box, and the other end is located on the outer side of the inner frame of the box.

6. The method according to claim 1, characterized in that, Multiple motion units are arranged at the bottom of the inner frame of the box near the outer frame of the box; a second collision sensor is provided at the bottom of the electric vehicle; When the battery control unit receives the actual collision location and actual collision energy of the vehicle underside sent by the second collision sensor, it predicts the collision location and collision energy of the bottom of the box body at the bottom of the outer frame of the box body based on the actual collision location and actual collision energy of the vehicle underside. The battery control unit determines a first bottom collision area containing the bottom collision location of the box based on the bottom collision location and the bottom collision energy of the box, and determines the power unit located in the second bottom collision area of ​​the bottom of the inner frame of the box as the fourth power unit; the first bottom collision area and the second bottom collision area are orthographic projections of each other on the side of the box. Based on the collision position and collision energy at the bottom of the housing, the battery control unit determines the fourth current required by the coil in the motion base of each fourth power unit, so as to send each fourth current to the high-voltage line in its corresponding fourth power unit. The high-voltage line in the fourth power unit provides current to the coil according to the fourth current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the fourth power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the fourth power unit, so that the orientation of the bracket in the fourth power unit is the direction of the bottom collision position of the box in the first box bottom collision area.

7. The method according to claim 1, characterized in that, The internal structure of the support in the motion mechanism is any one of the following: solid structure, hollow structure, or hollow multi-cavity structure.

8. The method according to claim 1, characterized in that, The identification system is radar, and the identification data is radar data; Alternatively, the recognition system may be a visual recognition system, and the recognition data may be image data or video data.

9. A collision adaptive system for a power battery, characterized in that, The system includes: a top cover, a housing that matches the top cover, a battery module and a battery control unit disposed within the housing, and a high-voltage unit; the housing includes an outer frame, an inner frame, multiple motion units, and an upper frame of the housing; each motion unit consists of a motion base and a motion mechanism, with one side of the motion mechanism being a bottom ball and the other side being a support; the bottom ball is movably disposed within a groove in the motion base that matches the bottom ball; the inner frame of the housing has multiple motion bases arranged around its perimeter near the outer frame of the housing; each motion base contains a coil and a high-voltage wire, and the bottom ball contains a permanent magnet; the cavity formed by the inner frame, the outer frame, and the upper frame of the housing is used to accommodate the motion mechanism within the motion unit for movement; The battery control unit is used for: The system receives the predicted collision location and predicted collision energy of the vehicle from the vehicle controller. The predicted collision location is predicted by the vehicle controller based on received identification data before the electric vehicle collides. The identification data is collected by an identification system installed on the electric vehicle body. The predicted collision energy is predicted by the vehicle controller based on the relative speed between the electric vehicle and the object being collided with, as well as the model of the electric vehicle. Based on the predicted collision location and predicted collision energy of the whole vehicle, the predicted collision location of the box body on the outer frame of the box body and the predicted collision energy of the box body borne by the outer frame of the box body are predicted; wherein, the battery module, the battery control unit and the high voltage unit in the box body constitute the power battery; Based on the predicted collision position and the predicted collision energy of the box, a first collision area containing the predicted collision position of the box is determined in the outer frame of the box, so that the power unit located in the second collision area in the inner frame of the box is determined as the first power unit; wherein, the first collision area and the second collision area are orthographic projections of each other on the side of the box. Based on the predicted collision location and the predicted collision energy of the box, the first current required by the coil in the motion base of each first power unit is determined, so as to send the first current required by each coil to the high voltage line in the corresponding first power unit. The high-voltage line in the first power unit is used to supply current to the coil according to the first current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the first power unit drives the bottom ball to move towards the strongest magnetic force point, so as to change the orientation of the bracket in the first power unit, so that the orientation of the bracket in the first power unit is the direction of the predicted collision position of the box in the first collision area.

10. The system according to claim 9, characterized in that, The battery control unit is also used for: When the electric vehicle is involved in a collision, it receives the actual collision location and actual collision energy of the vehicle from the first collision sensor installed on the vehicle body. Based on the actual collision location and the actual collision energy of the vehicle, the actual collision location of the box body on the outer frame of the box body and the actual collision energy of the box body borne by the outer frame of the box body are predicted. Based on the actual collision position and actual collision energy of the box, a first collision area containing the predicted collision position of the box is determined in the outer frame of the box, so that the power unit located in the second collision area in the inner frame of the box is determined as the second power unit; wherein, the first collision area and the second collision area are orthogonal projections of each other on the side of the box; Based on the actual collision position and actual collision energy of the box, the second current required by the coil in the motion base of each second power unit is determined so as to send the second current to the high voltage line in the corresponding second power unit. The high-voltage line in the second power unit is used to supply current to the coil according to the second current, so that the coil generates magnetic force. According to the strongest magnetic force point in the coil, the permanent magnet in the second power unit drives the bottom ball to move towards the strongest magnetic force point, so as to adjust the orientation of the bracket in the second power unit, so that the orientation of the bracket in the second power unit is adjusted to the direction of the actual collision position of the box in the first collision area.

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