New energy automobile bottom structure and vehicle

Abstract

The application discloses a new energy automobile bottom structure, which comprises a power battery pack and a collision-proof cross beam arranged at the front of the power battery pack. The new energy automobile bottom structure can reduce the safety hidden trouble of the battery pack by arranging the collision-proof cross beam, so that the obstacle can first collide with the collision-proof cross beam when the obstacle is encountered. The application further discloses a vehicle.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobiles, and in particular relates to a new energy automobile bottom structure and a vehicle. BACKGROUND

[0002] On a new energy automobile, a battery pack is arranged at the bottom of a vehicle body. When a vehicle chassis is scratched, an obstacle on the road surface is likely to hit the bottom wall of the battery pack, and the battery pack is prone to deformation caused by impact and extrusion, and the battery core body may be subject to thermal runaway and fire. Other components inside the battery pack may also be subject to extrusion and impact in the collision, and there is a risk of short circuit and even fire and explosion.

[0003] The high-voltage wire harness and high-voltage device inside the battery pack are likely to be scratched or torn off in a collision, which may cause a short circuit and fire, and may also cause electric shock. The key to power battery collision protection lies in controlling the deformation of the battery pack shell structure in the collision, and avoiding impact and extrusion on the internal elements as much as possible.

[0004] Therefore, measures need to be taken to reduce the safety hazards of the battery pack. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a new energy automobile bottom structure, which aims to reduce the safety hazards of the battery pack.

[0006] In order to solve the above technical problems, the technical solution adopted by the present application is: a new energy automobile bottom structure, comprising a power battery pack and a collision prevention cross beam arranged at the front of the power battery pack.

[0007] The collision prevention cross beam is arranged on a first support and a second support, and the first support and the second support are arranged on the vehicle body.

[0008] The first support is arranged in two, and the second support is arranged in at least one, and the second support is located between the two first supports.

[0009] The vehicle body of the new energy automobile is provided with an obstacle detection system, and the obstacle detection system comprises a sensor and a vehicle controller. The sensor is used to detect the height of the ground obstacle, and the sensor and the vehicle controller are electrically connected with the main brake system of the new energy automobile.

[0010] The sensor is installed at the position of the collision prevention cross beam, and the sensor transmits the measurement signal to the vehicle controller in real time.

[0011] The height of the ground obstacle detected by the sensor is set as h, the distance between the lowest part of the power battery pack and the ground is set as H, when h<=H, the new energy vehicle is normally driven, when h>H, the sensor outputs a scraping risk signal to the vehicle controller, and the new energy vehicle is slowed down to stop.

[0012] The power battery pack comprises an outer shell and a battery pack body, the outer shell is provided with a containing groove for accommodating the battery pack body, the containing groove is provided with oppositely arranged positioning plates and limiting plates, a buffer adjusting structure is arranged between the positioning plates and the limiting plates, and the battery pack body is located on the inner side of the buffer adjusting structure.

[0013] The battery pack body is arranged in the fixing frame, and a driven adjusting structure is arranged between the fixing frame and the buffer adjusting structure.

[0014] The application further provides a vehicle comprising the new energy vehicle bottom structure.

[0015] The new energy vehicle bottom structure can reduce the safety hazard of the battery pack by arranging the anti-collision cross beam, so that the obstacle can first impact the anti-collision cross beam when encountering the obstacle. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the new energy vehicle bottom structure of the application;

[0017] Figure 2 is a control flowchart of the new energy vehicle when encountering an obstacle;

[0018] Figure 3 is a schematic diagram of the sensor detecting the obstacle;

[0019] Figure 4 is a top view and half-section structural schematic diagram of the power battery pack;

[0020] Figure 5 is a top view structural schematic diagram of the outer shell;

[0021] Figure 6 is a half-section structural schematic diagram of the support;

[0022] Figure 7 is a half-section structural schematic diagram of the fixing frame;

[0023] Figure 8 is a top view structural schematic diagram of the power battery pack;

[0024] Figure 9 is a simulation analysis diagram of the three schemes;

[0025] The markings in the above figures are as follows: 1. Outer shell; 11. Receiving groove; 2. Positioning plate; 21. Servo motor; 22. Two-way lead screw; 23. Limiting plate; 24. Bracket; 25. Elastic band; 26. First electromagnet; 27. Second electromagnet; 3. Battery pack body; 31. Fixing frame; 32. Third electromagnet; 33. Fourth electromagnet; 4. Bushing; 41. Screw; 5. Protective cover; 6. Anti-collision beam; 7. Obstacle; 8. Sensor; 9. Battery pack bottom surface line; 10. Ground line. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] like Figure 1 As shown, the present invention provides a bottom structure for a new energy vehicle, including a power battery pack and a crossbeam 6 disposed at the front of the power battery pack. By adding the crossbeam 6, when encountering an obstacle, the obstacle first impacts the crossbeam 6, slowing down the vehicle speed, and simultaneously alerting the driver to the presence of an obstacle, prompting them to initiate deceleration or emergency braking.

[0030] Specifically, such as Figure 1As shown, the anti-collision cross beam 6 is located below the vehicle body of the new energy vehicle, between the front wheels and the power battery pack of the new energy vehicle, and the length direction of the anti-collision cross beam 6 is parallel to the width direction of the vehicle body. The anti-collision cross beam 6 is arranged on the first support and the second support, and the first support and the second support are fixedly arranged on the vehicle body. The first support is provided with two, and the second support is provided with at least one, and the second support is located between the two first supports and between the anti-collision cross beam 6 and the power battery pack. The anti-collision cross beam 6 is a steel beam, and the anti-collision cross beam 6 is welded with the first support and the second support, which can improve the structural strength of the anti-collision cross beam 6 and improve the anti-collision performance.

[0031] As shown in the drawings, Figure 1 In this embodiment, the second support is provided with one, which is located at the middle position of the two first supports and is fixedly connected with the anti-collision cross beam 6 at the middle position in the length direction of the anti-collision cross beam 6.

[0032] As shown in the drawings, Figure 2 and Figure 3 The vehicle body of the new energy vehicle is provided with an obstacle detection system, which includes a sensor and a vehicle controller. The sensor is used to detect the height of the ground obstacle, and the sensor and the vehicle controller are electrically connected with the main brake system of the new energy vehicle. The obstacle detection system can detect whether there is an obstacle in front of the vehicle in real time and trigger autonomous braking when an obstacle is detected, so as to avoid the chassis battery pack from colliding with the obstacle and reduce the safety hazard of the battery pack.

[0033] As shown in the drawings, Figure 2 and Figure 3 The sensor is installed at the position of the anti-collision cross beam 6, and the sensor transmits the measurement signal to the vehicle controller in real time. The height of the ground obstacle detected by the sensor is set as h, and the distance between the lowest part of the power battery pack and the ground is set as H. The lowest part of the power battery pack is the bottom surface of the power battery pack. When h≤H, the new energy vehicle normally travels; when h>H, the sensor outputs a scraping risk signal to the vehicle controller, and the new energy vehicle slows down to stop. After the vehicle controller issues a braking instruction, the braking force is controlled according to the vehicle speed V and the distance L between the obstacle and the power battery pack, so as to ensure that the vehicle can stop before the power battery pack touches the obstacle.

[0034] As shown in the drawings, Figure 9 In this application, the effect of installing the anti-collision cross beam 6 is simulated by CAE analysis, which is divided into three schemes for simulation analysis (please refer to the CAE analysis report):

[0035] Scheme one: no anti-collision cross beam 6 at the bottom of the vehicle body;

[0036] Scheme two: two anti-collision cross beams 6 are installed at the bottom of the vehicle body;

[0037] Option 3: Install anti-collision crossbeams at three points on the bottom of the vehicle body.

[0038] During the simulation test, all three schemes faced the same working conditions, namely, the vehicle drove through a fixed solid hemispherical barrier at a speed of 30 km / h, and the Z-direction intrusion of the bottom of the battery pack was examined.

[0039] Analysis results: The bottom intrusion of the battery pack in Scheme 1 is 22.7mm, the bottom intrusion of the battery pack in Scheme 2 is 19.9mm, and the bottom intrusion of the battery pack in Scheme 3 is 18.8mm.

[0040] In summary, Option 3 involves the least intrusion into the bottom of the battery pack, and therefore carries the lowest risk.

[0041] The power battery pack includes an outer shell and a battery pack body. The outer shell has a receiving groove for housing the battery pack body. The receiving groove has a positioning plate and a limiting plate arranged opposite to each other. A buffer adjustment structure is provided between the positioning plate and the limiting plate. The battery pack body is located inside the buffer adjustment structure.

[0042] The battery pack body is housed within a fixed frame, and a driven adjustment structure is provided between the fixed frame and the buffer adjustment structure.

[0043] The battery pack connection mechanism of this new energy vehicle can effectively absorb energy and buffer during a collision, thereby enhancing the buffer protection of the battery pack body during the collision and effectively avoiding dangerous situations such as the battery pack body exploding due to severe impact.

[0044] like Figure 4 to Figure 8 As shown, the power battery pack includes an outer shell 1 and a battery pack body 3. A crossbeam 6 is located in front of the outer shell 1. The battery pack body 3 provides electrical energy. The outer shell 1 has a receiving groove 11 for housing the battery pack body 3, which is placed within the receiving groove. A protective cover 5 is fixedly inserted into the top of the inner wall of the receiving groove, and the upper surface of the protective cover is coplanar with the upper surface of the outer shell 1. A positioning plate and a limiting plate are arranged opposite to each other within the receiving groove. Preferably, the positioning plate is fixed to one side of the inner wall of the receiving groove, and the limiting plate is fixed to the other side of the inner wall of the receiving groove. The positioning plate and the limiting plate are arranged parallel to each other. A buffer adjustment structure is provided between the positioning plate 2 and the limiting plate 23, and the battery pack body is located inside the buffer adjustment structure. The buffer adjustment structure between the positioning plate and the limiting plate within the receiving groove effectively positions and connects the battery pack body.

[0045] The battery pack body is fixed by the fixing frame 31, is positioned and connected by the fixing frame and the buffer adjusting structure, and is convenient to install; the fixing frame and the buffer adjusting structure are provided with the driven adjusting structure, and the driven adjusting structure also has a buffering function; the buffer adjusting structure cooperates with the driven adjusting structure to effectively absorb energy and buffer during the impact of the new energy automobile or the battery pack.

[0046] The fixing frame comprises a pair of fixing supports arranged oppositely, and the two fixing supports are each provided with the driven adjusting structure; the driven adjusting structure and the buffer adjusting structure are used to limit the position of the battery pack body in the shell; the two fixing supports are each threadedly connected with a screw rod 41 at the middle of the adjacent side; the adjacent ends of the two screw rods are connected through a movable rotating sleeve; the two ends of the movable rotating sleeve are screw threads matched with the ends of the screw rods; the movable rotating sleeve is a bearing rotating sleeve with a bearing in the middle; the relative distance between the two fixing supports can be adjusted by rotating the movable rotating sleeve, so that the battery pack body of different sizes can be installed.

[0047] Preferably, the buffer adjusting structure comprises a motor, two bidirectional screw rods 22 and two support structures for positioning the battery pack body; the two bidirectional screw rods are arranged opposite to the edges of the containing grooves; the two bidirectional screw rods are rotatably arranged between the positioning plate and the limiting plate and are connected with the motor at the ends; the motor is a servo motor 21; the support structure is connected with the screw rod through a threaded sleeve. The positioning plate and the support structure on one side are both provided with elastic structures; preferably, the elastic structure is an elastic band 25, which is simple in structure and relatively low in cost; preferably, the screw threads on the two sides of the middle part of the bidirectional screw rod are opposite in rotation direction; the middle part of the side face of each support structure is provided with an elastic band; one side of each elastic band is connected with the positioning plate and the limiting plate respectively.

[0048] The driven adjusting structure comprises an inner electromagnet structure and an outer electromagnet structure that are attracted to each other; the outer electromagnet structure is inlaid in the inner side of the support structure, and the inner electromagnet structure is inlaid in the outer side of the fixing frame; the inner electromagnet structure and the outer electromagnet structure are arranged correspondingly.

[0049] Preferably, the driven adjusting structure comprises: the third electromagnet 32 is inlaid on one side of the end of the fixing frame; the fourth electromagnet 33 is inlaid on the middle part of the two sides of the fixing frame; the first electromagnet 26 is inlaid on the inner side of the end of the support structure; the first electromagnet is attracted to the third electromagnet; the second electromagnet 27 is inlaid on the middle part of one side of the support structure close to the two ends; the second electromagnet is attracted to the fourth electromagnet; the impact force offset effect of the new energy automobile or the battery pack during the impact can be effectively controlled by adjusting the magnetic attraction strength between them; further, the inner side of the support structure is provided with a slot, and the fixing frame is located in the slot; the fixing frame is limited in the slot; the structure is compact, stable and reliable.

[0050] In the application, the battery pack body can be effectively positioned and connected by the buffer adjusting structure arranged between the positioning plate and the limiting plate in the accommodating groove of the outer shell. The energy absorption buffer can be effectively implemented in the impact process of the new energy automobile or the battery pack by the buffer adjusting structure cooperating with the driven adjusting structure, the buffer protection effect of the battery pack body in the impact process is further improved, the explosion and other dangerous situations of the battery pack body caused by severe impact are effectively avoided, and the safety hidden danger of the battery pack can be further reduced.

[0051] The application preferably comprises embodiment 1:

[0052] As shown in Figure 4 and Figure 8 , the power battery pack comprises an outer shell 1 and a battery pack body 3, the upper surface of the outer shell 1 is provided with an accommodating groove 11, and the battery pack body 3 is arranged in the accommodating groove 11; a cover 5 is fixedly inserted at the top of the inner wall of the accommodating groove 11, and the upper surface of the cover 5 is coplanar with the upper surface of the outer shell 1.

[0053] A positioning plate 2 is arranged on one side of the inner wall of the accommodating groove 11, and a limiting plate 23 is arranged on the other side of the inner wall of the accommodating groove 11, the positioning plate 2 and the limiting plate 23 are arranged in parallel and symmetrically, the buffer adjusting structure is arranged between the limiting plate 23 and the positioning plate 2, and the battery pack body 3 is arranged inside the buffer adjusting structure; the two sides of the periphery of the battery pack body 3 are sleeved with a fixed frame 31, and the periphery of the two fixed frames 31 is provided with a driven adjusting structure, and the driven adjusting structure and the buffer adjusting structure are used to limit the position of the battery pack body 3 in the outer shell 1.

[0054] The accommodating groove 11 arranged in the outer shell 1 can accommodate and arrange the battery pack body 3, the buffer adjusting structure arranged between the positioning plate 2 and the limiting plate 23 in the accommodating groove 11 can effectively position and connect the battery pack body 3, the energy absorption buffer can be effectively implemented in the impact process of the new energy automobile by the buffer adjusting structure cooperating with the driven adjusting structure, the buffer protection effect of the battery pack body 3 in the impact process is further improved, and the explosion and other dangerous situations of the battery pack body 3 caused by severe impact are effectively avoided.

[0055] The application preferably comprises embodiment 2:

[0056] As shown in Figure 4 , Figure 5 and Figure 6 , the power battery pack comprises an outer shell 1 and a battery pack body 3, the upper surface of the outer shell 1 is provided with an accommodating groove 11, and the battery pack body 3 is arranged in the accommodating groove 11; a cover 5 is fixedly inserted at the top of the inner wall of the accommodating groove 11, and the upper surface of the cover 5 is coplanar with the upper surface of the outer shell 1.

[0057] The buffer adjusting structure further comprises: two servo motors 21 arranged at the middle of the inner side of the positioning plate 2, the power output ends of the two servo motors 21 are both connected with a bidirectional screw rod 22 through bolts, one end of the two bidirectional screw rods 22 is movably inserted with a limiting plate 23, the middle of the outer periphery of the two bidirectional screw rods 22 is threadedly sleeved with a support 24, the thread rotation directions of the middle of the outer periphery of the two bidirectional screw rods 22 are opposite, the middle of the opposite surface of the two supports 24 is provided with an elastic belt 25, and one side of the two elastic belts 25 is connected with the positioning plate 2 and the limiting plate 23 respectively. Through the two servo motors 21 arranged in the positioning plate 2, the bidirectional screw rod 22 can adjust and offset the impact force generated by the support 24 when limiting the position of the battery pack body 3 through the thread engagement force between the two supports 24, so that the effect of buffering and offsetting the impact force when the new energy automobile is impacted is realized, and the auxiliary energy absorption effect can be further improved by the elastic belt 25 arranged between the positioning plate 2 and the limiting plate 23.

[0058] In the preferred embodiment 3 of the application,

[0059] As shown in Figure 4 , Figure 5 , Figure 6 and Figure 7 , the power battery pack comprises an outer shell 1 and a battery pack body 3, the upper surface of the outer shell 1 is provided with a containing groove 11, and the battery pack body 3 is arranged in the containing groove 11; a positioning plate 2 is arranged on one side of the inner wall of the containing groove 11, a limiting plate 23 is arranged on the other side of the inner wall of the containing groove 11, and a buffer adjusting structure is arranged between the limiting plate 23 and the positioning plate 2; the two sides of the outer periphery of the battery pack body 3 are both sleeved with a fixed frame 31, and the outer periphery of the two fixed frames 31 is provided with a driven adjusting structure.

[0060] The driven adjusting structure further comprises: a third electromagnet 32 and a fourth electromagnet 33, the middle of one side of the outer periphery of the fixed frame 31 is embedded with the third electromagnet 32, the middle of the two sides of the outer periphery of the fixed frame 31 is embedded with the fourth electromagnet 33, the middle of one side of the support 24 is embedded with the first electromagnet 26, the first electromagnet 26 is adsorbed with the third electromagnet 32, the middle of one side of the support 24 close to the two ends is embedded with the second electromagnet 27, and the second electromagnet 27 is adsorbed with the fourth electromagnet 33; the two ends of the middle of the adjacent side of the two fixed frames 31 are threadedly inserted with a screw rod 41, and the adjacent ends of the two adjacent screw rods 41 are rotatably sleeved with a shaft sleeve 4 through a bearing.

[0061] Wherein, by setting a corresponding first electromagnet 26, third electromagnet 32, second electromagnet 27 and fourth electromagnet 33 between the two supports 24 and the two fixed frames 31, the impact force offset effect of the new energy vehicle when the impact occurs can be effectively controlled by adjusting the magnetic force adsorption strength between each other, the effect of protecting the battery pack body 3 in the outer shell 1 is realized, and the safety performance of the new energy vehicle is further improved, the fastening degree of the two fixed frames 31 around the battery pack body 3 can be adjusted by rotating the screw rod 41, so that the effect of installing battery pack bodies 3 of different sizes can be adapted.

[0062] In use, by setting two servo motors 21 in the positioning plate 2, the impact force generated when the support 24 limits the position of the battery pack body 3 can be adjusted and offset by the screw thread engagement force between the bidirectional screw rod 22 and the two supports 24 through synchronous driving of the servo motor 21, thereby realizing the effect of buffering and offsetting the impact force of the new energy vehicle when the impact occurs, and the elastic belt 25 provided between the positioning plate 2 and the limiting plate 23 can further improve the auxiliary energy absorption effect, by setting a corresponding first electromagnet 26, third electromagnet 32, second electromagnet 27 and fourth electromagnet 33 between the two supports 24 and the two fixed frames 31, the impact force offset effect of the new energy vehicle when the impact occurs can be effectively controlled by adjusting the magnetic force adsorption strength between each other, the effect of protecting the battery pack body 3 in the outer shell 1 is realized, and the safety performance of the new energy vehicle is further improved, the fastening degree of the two fixed frames 31 around the battery pack body 3 can be adjusted by rotating the screw rod 41, so that the effect of installing battery pack bodies 3 of different sizes can be adapted.

[0063] The application also provides a vehicle comprising the new energy vehicle bottom structure. Figure 1 to Figure 8 structure of the new energy vehicle bottom structure can be referred to

[0064] In this embodiment, the vehicle is a new energy vehicle.

[0065] The application has been described above with reference to the drawings; obviously, the specific implementation of the application is not limited to the above modes, and various non-essential improvements or direct application of the inventive concept and technical solution to other occasions without improvement are within the protection scope of the application.

Claims

1. A new energy vehicle bottom structure, comprising a power battery pack, characterized in that: The anti-collision cross beam is arranged at the front of the power battery pack. The power battery pack comprises an outer shell and a battery pack body, the outer shell is provided with a containing groove for arranging the battery pack body, the containing groove is provided with a positioning plate and a limiting plate arranged oppositely, a buffer adjusting structure is arranged between the positioning plate and the limiting plate, and the battery pack body is located at the inner side of the buffer adjusting structure. The buffer adjusting structure further comprises: two servo motors are arranged at the both ends of the middle part of the inner side of the positioning plate, the power output ends of the two servo motors are both connected with a bidirectional screw rod through bolts, one end of the two bidirectional screw rods is movably inserted with the limiting plate, and the both sides of the middle part of the outer periphery of the two bidirectional screw rods are threadedly sleeved with a support; the thread rotation directions of the both sides of the middle part of the outer periphery of the two bidirectional screw rods are opposite, the middle part of the opposite surface of the two supports is provided with an elastic belt, and one side of the two elastic belts is connected with the positioning plate and the limiting plate respectively.

2. The new energy vehicle bottom structure according to claim 1, characterized in that: The anti-collision cross beam is arranged on the first support and the second support, and the first support and the second support are arranged on the vehicle body.

3. The new energy vehicle bottom structure according to claim 2, characterized in that: The first support is arranged in two, and the second support is arranged in at least one and located between the two first supports.

4. The new energy vehicle bottom structure according to any one of claims 1 to 3, characterized in that: The vehicle body of the new energy vehicle is provided with an obstacle detection system, the obstacle detection system comprises a sensor and a vehicle controller, the sensor is used for detecting the height of the ground obstacle, the sensor and the vehicle controller are electrically connected with the main brake system of the new energy vehicle.

5. The new energy vehicle bottom structure according to claim 4, characterized in that: The sensor is installed at the position of the anti-collision cross beam, and the sensor transmits the measurement signal to the vehicle controller in real time.

6. The new energy vehicle bottom structure according to claim 4, characterized in that: The height of the ground obstacle detected by the sensor is set as h, the distance between the lowest part of the power battery pack and the ground is set as H, when h≤H, the new energy vehicle normally drives, when h>H, the sensor outputs a scraping risk signal to the vehicle controller, and the new energy vehicle slows down to stop.

7. The new energy vehicle bottom structure according to any one of claims 1 to 3, characterized in that: The battery pack body is arranged in the fixing frame, and a driven adjusting structure is arranged between the fixing frame and the buffer adjusting structure.

8. Vehicle, characterized in that: The new energy vehicle bottom structure comprises the new energy vehicle bottom structure according to any one of claims 1 to 7. The new energy vehicle bottom structure comprises the new energy vehicle bottom structure according to any one of claims 1 to 7.

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