A side collision protection battery box for new energy vehicles

Abstract

The present invention discloses a side collision protection battery box for a new energy vehicle, comprising a frame, wherein the frame comprises a transverse frame located in the width direction of the vehicle body, and a primary buffer structure for connecting to the longitudinal main beam of the vehicle is provided on the transverse frame on the outer side of the battery box. The transverse frame buffers and unloads force between the primary buffer structure and the longitudinal main beam of the vehicle. The buffer structure is arranged outside the transverse frame, which can protect the battery box from side collisions without occupying space inside the box.

Description

Technical Field

[0001] The present invention belongs to the field of battery boxes, and in particular relates to a side collision protection battery box for new energy vehicles. Background Art

[0002] At present, the battery box is directly installed on the longitudinal main beam of the vehicle chassis. After being installed on the vehicle, when the vehicle is hit from the left or right side, the longitudinal main beam of the vehicle chassis is subjected to lateral impact, and its deformation directly squeezes the lateral frame of the battery toward the frame frame, thereby causing the battery box to deform, and even directly squeeze the battery pack inside the battery box. In order to protect the battery box from lateral collisions, the current method is to add flexible bodies or buffer structures inside the battery box to unload and buffer the force. However, with the growing demand for battery capacity, it occupies the space inside the battery box, and there is a disadvantage that the space in the cavity for installing the battery pack will be reduced accordingly. Therefore, it is necessary to propose a side collision protection battery box for new energy vehicles that does not occupy the space inside the battery box cavity. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a side collision protection battery box for new energy vehicles, in which the buffer structure is arranged outside the transverse frame so as not to occupy space inside the box.

[0004] Technical solution: To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A side collision protection battery box for a new energy vehicle includes a frame, wherein the frame includes a transverse frame located in the width direction of the vehicle body. A primary buffer structure for connecting to the longitudinal main beam of the vehicle is provided on the outer side of the transverse frame and is used to buffer and unload force between the transverse frame and the longitudinal main beam of the vehicle.

[0006] Furthermore, the transverse frame includes a frame body and a frame side skirt, the frame side skirt is protruding outward from the frame frame, and the frame body and the frame side skirt form a stepped surface;

[0007] The primary buffer structure includes a number of buffer bodies distributed at intervals along the length direction of the transverse frame and corresponding to the step profile. The buffer body includes a base portion connected to the longitudinal main beam of the vehicle, a main body connecting arm connected to the frame body, and a side skirt connecting arm connected to the frame side skirt. The base portion cantilevers to the outside of the frame side skirt; in the impact deformation state, the base portion twists in the vertical plane relative to the transverse frame through the main body connecting arm or the side skirt connecting arm.

[0008] Furthermore, the connection between the side skirt connecting arm and the frame side skirt is located on the step surface, and the intersection of the side skirt connecting arm and the frame side skirt is linearly connected and constitutes an impact shear line, and the impact shear line is parallel to the frame body; in the impact state, the side skirt connecting arm can be broken and separated relative to the frame side skirt on the impact shear line.

[0009] Furthermore, shear holes are opened on the side skirt connecting arms or the frame side skirts corresponding to the impact shear lines, and the impact shear lines are divided into several sections in the length direction by at least one group of shear holes.

[0010] Furthermore, the shear hole is located in the step profile and on the top surface of the frame side skirt.

[0011] Furthermore, a buffer cavity is formed between the step surface, the main body connecting arm and the side skirt connecting arm, and the main body connecting arm is arranged to protrude outward away from the buffer cavity; the main body connecting arm has a tendency to twist and deform toward the buffer cavity.

[0012] Furthermore, the base portion and the main body connecting arm are arranged coplanarly and perpendicular to the transverse frame, and the side skirt connecting arm is parallel to the frame body and perpendicular to the main body connecting arm.

[0013] The transverse frame is an inner cavity structure, and the inner cavity of the transverse frame includes a secondary buffer structure. The primary buffer structure and the secondary buffer structure sequentially buffer and unload forces in a direction perpendicular to the transverse frame.

[0014] Furthermore, the secondary buffer structure includes at least one buffer plate vertically arranged in the inner cavity of the transverse frame, and the inner cavity of the transverse frame is divided into a plurality of secondary buffer cavities in the impact direction by the buffer plate.

[0015] Furthermore, at least one group of transverse inner supporting plates is provided in each of the secondary buffer cavities perpendicular to the buffer plates, and the inner supporting plates are supported internally by the buffer plates.

[0016] Beneficial Effects: The present invention positions the buffer structure outside the transverse frame, providing side impact protection for the battery box while maintaining internal space. Furthermore, the primary buffer structure, serving as a connecting component between the battery box and the vehicle's longitudinal main beam, deforms and buffers the battery box during a side impact. After the primary buffer structure buffers and unloads the force, only a small amount of force remains on the battery box, significantly reducing the impact force and deformation experienced by the battery box itself, providing excellent protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0018] Attachment Figure 2 A top view of the overall structure of the present invention;

[0019] Attachment Figure 3 This is an enlarged schematic diagram of the structure of part A of the present invention;

[0020] Attachment Figure 4 It is a half-section schematic diagram along the BB line of the present invention;

[0021] Attachment Figure 5 This is a schematic diagram of part A from another perspective of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] As attached Figure 1 and attached Figure 2 As shown, a side collision protection battery box for a new energy vehicle includes a frame frame, and the frame frame includes a transverse frame 1 located in the width direction of the vehicle body. A primary buffer structure for connecting to the longitudinal main beam of the vehicle is provided on the outside of the battery box on the transverse frame 1, and the transverse frame 1 is used to buffer and unload force between the longitudinal main beam of the vehicle through the primary buffer structure. The buffer structure is arranged outside the transverse frame, which can protect the battery box from side collisions without occupying space inside the box. Moreover, the primary buffer structure serves as a connecting component between the battery box and the longitudinal main beam of the vehicle. When the vehicle is subjected to a side collision, deformation and buffering occur between the battery box and the longitudinal main beam of the vehicle. After the primary buffer structure buffers and unloads force, only a small force acts on the battery box, which can greatly reduce the impact force and impact deformation of the battery box body, and can protect the battery box body very well.

[0024] As attached Figure 3 To the attached Figure 5 As shown, the horizontal frame 1 includes a frame body 3 and a frame side skirt 4. The frame side skirt 4 is integrally protruded toward the outside of the frame frame, and the protruding direction is perpendicular to the frame body. The frame body 3 and the frame side skirt 4 are in an L-shaped position structure, and the frame body and the frame side skirt form an L-shaped step-shaped step surface 3a;

[0025] The first-level buffer structure includes a number of buffer bodies 2 distributed at intervals along the length direction of the transverse frame 1 and corresponding to the step profile 3a. The buffer body 2 is used to be connected to the longitudinal main beam of the vehicle. The buffer body 2 includes a base portion 5 connected to the longitudinal main beam of the vehicle, a main body connecting arm 6 connected to the frame body 3, and a side skirt connecting arm 7 connected to the frame side skirt 4. The main body connecting arm 6 and the side skirt connecting arm are arranged at an angle and are preferably perpendicular to each other. The base portion 5 is a block structure and cantilevers to the outside of the frame side skirt 4 and is located above the frame side skirt 4. A through mounting hole 5a is provided on the base portion 5 for fixed connection to the longitudinal main beam of the vehicle through a connecting bolt 20; a connection in two directions is formed by the main body connecting arm and the side skirt connecting arm. In the impact deformation state, the base portion 5 is twisted and deformed in the vertical plane relative to the transverse frame 1 through the main body connecting arm or the side skirt connecting arm, converting part of the impact force into torsion, thereby reducing the force in the impact direction.

[0026] The connection between the side skirt connecting arm 7 and the frame side skirt 4 is located on the step surface 3a, and the intersection of the side skirt connecting arm 7 and the frame side skirt 4 is linearly connected and forms an impact shear line 8. The impact shear line 8 can also be a strip with a smaller width. The impact shear line 8 is parallel to the frame body 3 in the length direction of the frame body 3; vertically, the side skirt connecting arm 7 bears the weight of the battery box and provides tension. Laterally, shear force only exists in the impact state. When the longitudinal main beam of the vehicle is subjected to a lateral impact, and when the impact exceeds the maximum shear force, the side skirt connecting arm 7 can be broken and separated relative to the frame side skirt 4 at the impact shear line, and after the side skirt connecting arm 7 and the frame side skirt 4 are disconnected at the impact shear line, the base part 5 continues to be squeezed and deformed downward or upward relative to the frame body 3 through the main body connecting arm 6. The distance between the base part 5 and the frame body 3 is the compensation distance for the squeezing and bending deformation, providing deformation space to prevent the base part 5 from directly colliding with the frame body.

[0027] As attached Figure 5 As shown, a shear hole 9 is opened on the side skirt connecting arm 7 or the frame side skirt 4 corresponding to the impact shear line 8, wherein the shear hole 9 is located in the step profile 3a and on the top surface of the frame side skirt 4, and the impact shear line 8 is divided into several segments by at least one group of shear holes 9 in the length direction. By dividing it into several non-continuous impact shear line segments, the impact force threshold for the impact shear line 8 to break can be reduced, and the shear hole 9 can increase the shearing effect between the impact shear line segments, which is more conducive to tearing and breaking at the impact shear line.

[0028] A buffer cavity 11 is formed between the step surface 3a, the main body connecting arm and the side skirt connecting arm, and the main body connecting arm 6 is arranged to protrude outward away from the buffer cavity 11; the main body connecting arm 6 has a tendency to twist and deform toward the buffer cavity 11. When the main body connecting arm 6 is squeezed and bent, it can bend and arch upward. Because the impact causes the side skirt connecting arm and the frame side skirt 4 to be disconnected from the impact shear line 8, at this time, the bottom end of the side skirt connecting arm 7 rubs and slides on the top surface of the frame side skirt 4, increasing its resistance in the direction of the impact force, thereby suppressing the bending amplitude of the main body connecting arm, improving its impact resistance while buffering.

[0029] A plurality of grooves are also concavely provided on the upper surface of the frame side skirt to increase the sliding friction resistance of the bottom end of the side skirt connecting arm 7 on the upper surface of the frame side skirt.

[0030] A reinforcing plate 17 inclined to the side skirt connecting arm is also provided between the bottom end of the side skirt connecting arm 7 and the body part 5, which is used to increase the bending resistance of the side skirt connecting arm 7 and ensure that the bottom end of the rim connecting arm 7 can slide on the upper surface of the frame side skirt after breaking.

[0031] The base portion 5 and the main body connecting arm 6 are arranged on the same plane and are perpendicular to the transverse frame 1 , and the side skirt connecting arm 7 is parallel to the frame body and perpendicular to the main body connecting arm 6 .

[0032] As attached Figure 4 As shown, the transverse frame 1 has an internal cavity structure, which can provide buffering while also being lightweight. The internal cavity of the transverse frame 1 contains a secondary buffer structure. The primary and secondary buffer structures sequentially buffer and unload forces in a direction perpendicular to the transverse frame 1. This multi-stage buffer mechanism provides buffering, enhancing the protection of the battery box. Furthermore, both the primary and secondary buffer structures are located outside the battery box, eliminating the need to occupy space within the battery box.

[0033] The secondary buffer structure includes at least one buffer plate 10 vertically disposed within the inner cavity of the transverse frame 1. The inner cavity of the transverse frame 1 is divided into several secondary buffer cavities 12 oriented in the direction of impact by the buffer plates 10. These cavities form a multi-level buffer, enhancing the buffering and compensation space. Each secondary buffer cavity 12 is provided perpendicularly to the buffer plate 10 with at least one set of transverse inner support plates 13. These inner support plates 13 are internally supported by the buffer plate 10, increasing the support strength between two adjacent buffer plates 10 or the support strength between the buffer plate and the inner cavity wall of the transverse frame, thereby improving deformation resistance.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A side collision protection battery box for new energy vehicles, characterized by: The invention comprises a frame frame, wherein the frame frame comprises a transverse frame (1) located in the width direction of the vehicle body, wherein a primary buffer structure for connecting to the longitudinal main beam of the vehicle is provided on the transverse frame (1) and located outside the battery box, wherein the transverse frame (1) buffers and unloads force between the primary buffer structure and the longitudinal main beam of the vehicle; the primary buffer structure is a connecting component between the battery box and the longitudinal main beam of the vehicle, and when the vehicle is in a side collision, the primary buffer structure can buffer and unload force; The transverse frame (1) comprises a frame body (3) and a frame side skirt (4); the frame side skirt (4) is arranged to protrude outward from the frame frame; the frame body and the frame side skirt form a stepped surface (3a); the protruding direction is perpendicular to the frame body (3); the frame body (3) and the frame side skirt (4) are in an L-shaped position structure; The primary buffer structure comprises a plurality of buffer bodies (2) spaced apart along the longitudinal direction of the transverse frame (1) and corresponding to the step profile (3a), the buffer body (2) comprising a base portion (5) connected to the longitudinal main beam of the vehicle, a main body connecting arm (6) connected to the frame body (3), and a side skirt connecting arm (7) connected to the frame side skirt (4), the main body connecting arm (6) and the side skirt connecting arm (7) being arranged at an angle and perpendicular to each other, the base portion (5) cantilevers to the outside of the frame side skirt (4) and is located above the frame side skirt (4), and is connected in two directions by the main body connecting arm (6) and the side skirt connecting arm (7), and in an impact deformation state, the base portion (5) is twisted and deformed in a vertical plane relative to the transverse frame (1) through the main body connecting arm or the side skirt connecting arm; The connection between the side skirt connecting arm (7) and the frame side skirt (4) is located on the step profile (3a), and the intersection of the side skirt connecting arm (7) and the frame side skirt (4) is linearly connected and forms an impact shear line (8), and the impact shear line (8) is parallel to the frame body (3); in the vertical direction, the side skirt connecting arm (7) bears the weight of the battery box, and in the horizontal direction, shear force exists only in the impact state; in the impact state, the side skirt connecting arm (7) can be broken and separated relative to the frame side skirt (4) on the impact shear line; and when the side skirt connecting arm (7) and the frame side skirt (4) are broken and separated at the impact shear line, the base part (5) continues to be squeezed and bent downward relative to the frame body (3) through the main body connecting arm (6), and the distance between the base part (5) and the frame body (3) is the compensation distance for the squeeze and bending deformation, providing deformation space; A buffer cavity (11) is formed between the step profile (3a), the main body connecting arm (6) and the side skirt connecting arm (7), and the main body connecting arm (6) is arranged to protrude outward away from the buffer cavity (11); the main body connecting arm (6) has a tendency to twist and deform toward the buffer cavity (11), and when the main body connecting arm (6) is squeezed and bent, it can bend upward, thereby causing the side skirt connecting arm (7) and the frame side skirt (4) to be disconnected from the impact shear line (8), and at this time, the bottom end of the side skirt connecting arm (7) slides and rubs on the top surface of the frame side skirt (4); A reinforcing plate (14) inclined towards the side skirt connecting arm (7) is further provided between the bottom end of the side skirt connecting arm (7) and the base portion (5). The reinforcing plate (14) can increase the bending resistance of the side skirt connecting arm (7), thereby enabling the bottom end of the side skirt connecting arm (7) to slide on the upper surface of the frame side skirt (4) after breaking.

2. The side impact protection battery box for a new energy vehicle according to claim 1, characterized in that: The base portion (5) and the main body connecting arm (6) are arranged coplanarly and perpendicular to the transverse frame (1); the side skirt connecting arm (7) is parallel to the frame body and perpendicular to the main body connecting arm (6).

3. The side impact protection battery box for a new energy vehicle according to claim 1, characterized in that: The side skirt connecting arm (7) or the frame side skirt (4) is provided with shear holes (9) corresponding to the impact shear line (8), and the impact shear line (8) is divided into several sections in the length direction by at least one group of shear holes (9).

4. The side impact protection battery box for a new energy vehicle according to claim 3, characterized in that: The shearing hole (9) is located within the step profile (3a) and on the top surface of the frame side skirt (4).

5. The side impact protection battery box for a new energy vehicle according to claim 1, characterized in that: The transverse frame (1) is an inner cavity structure, and the inner cavity of the transverse frame (1) contains a secondary buffer structure, and the primary buffer structure and the secondary buffer structure sequentially buffer and unload forces in a direction perpendicular to the transverse frame (1).

6. The side impact protection battery box for a new energy vehicle according to claim 5, characterized in that: The secondary buffer structure comprises at least one buffer plate (10) vertically arranged in the inner cavity of the transverse frame (1); the inner cavity of the transverse frame (1) is divided into a plurality of secondary buffer cavities (12) in the impact direction by the buffer plate (10).

7. The side impact protection battery box for a new energy vehicle according to claim 6, characterized in that: At least one group of transverse inner support plates (13) is provided in each of the secondary buffer cavities (12) perpendicular to the buffer plate (10), and the inner support plates (13) are supported inside the buffer plate (10).

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