Battery pack box body edge beam splicing structure

Abstract

The utility model provides an edge beam splicing structure of a battery pack box body. The edge beam splicing structure comprises a first edge beam and a second edge beam, the first edge beam comprises at least three first transverse plates and two first longitudinal plates, the two first transverse plates and the two first longitudinal plates define a first frame body with a rectangular section, and the other at least one first transverse plate is arranged in the first frame body; the second edge beam comprises at least three second transverse plates and two second longitudinal plates, the two second transverse plates and the two second longitudinal plates define a second frame body with a rectangular section, and the other at least one second transverse plate is arranged in the second frame body; the first transverse plates and the second transverse plates are matched in a lap joint mode, the end face of at least one first transverse plate located in the first frame abuts against the inner side face of the second longitudinal plate to form a first seam, and the end face of at least one second transverse plate located in the second frame abuts against the inner side face of the first longitudinal plate to form a second seam. And the first seam and the second seam are connected through a welding process. The first transverse plate and the second transverse plate are in staggered lap joint, the strength of the splicing position in the z direction is improved, the connecting strength is improved by increasing welding seams, and the situation that the welding seams crack and fail to finally cause low structural strength and poor airtightness of the battery pack is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack box side beam splicing structure. Background Technology

[0002] As the mechanical operating conditions of battery packs become increasingly stringent, many automakers have proposed that the vibration of battery packs should be 2 to 3 times greater than the national standard requirements, especially in random vibrations in the x, y, and z directions, with vibration in the z direction often being the most difficult to pass.

[0003] In existing technologies, aluminum extruded frame housings typically employ a full-circle welding process at the edge beam joints to connect the two extruded beams. However, this approach does not improve strength against random vibrations in the z-direction, and the weld at this point can still crack and fail under harsh operating conditions, ultimately leading to low structural strength and poor airtightness of the battery pack. Utility Model Content

[0004] In view of this, the present invention proposes a battery pack box side beam splicing structure to solve the technical problem mentioned in the background art that there is no improvement in strength for random vibration in the z direction, and the weld seam will still crack and fail under harsh working conditions, ultimately resulting in low structural strength and poor airtightness of the battery pack.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a battery pack housing side beam splicing structure, including a first side beam and a second side beam, wherein:

[0007] The first side beam includes at least three first horizontal plates and two first vertical plates. The at least three first horizontal plates are arranged in parallel and spaced apart, with the direction of the spacing being the extension direction of the first vertical plates. The two first horizontal plates and the two first vertical plates form a first frame with a rectangular cross-section. At least one additional first horizontal plate is disposed within the first frame.

[0008] The second side beam includes at least three second horizontal plates and two second vertical plates. The at least three second horizontal plates are arranged in parallel and spaced apart, with the direction of the spacing being the extension direction of the second vertical plates. The two second horizontal plates and the two second vertical plates form a second frame with a rectangular cross-section. At least one additional second horizontal plate is disposed within the second frame.

[0009] The first horizontal plate and the second horizontal plate overlap and cooperate, and the end face of at least one of the first horizontal plates located in the first frame abuts against the inner side of the second vertical plate to form a first joint, and the end face of at least one of the second horizontal plates located in the second frame abuts against the inner side of the first vertical plate to form a second joint, and the first joint and the second joint are connected by welding.

[0010] Based on the above technical solutions, preferably, one of the first horizontal plate and the second horizontal plate is provided with a plug-in part and the other is provided with a plug-in groove, wherein the plug-in part and the plug-in groove are plugged into each other.

[0011] Based on the above technical solutions, preferably, the height of the plug-in part and the plug-in slot are both half the thickness of the first horizontal plate.

[0012] Based on the above technical solutions, preferably, the insertion groove is obtained by cutting a first rectangular groove downward from the surface of the second horizontal plate, and both the top and bottom of the second horizontal plate are provided with a 45-degree right-angle cut; the insertion part is obtained by cutting a 45-degree right-angled triangular groove downward from the surface of the top and bottom first horizontal plates, or by cutting a second rectangular groove downward from the surface of the first horizontal plate inside the first frame, the hypotenuse of the right-angled triangular groove is in contact with the end face of the top second horizontal plate or the end face of the bottom second horizontal plate, and the bottom surface of the second rectangular groove abuts against the end face of the second horizontal plate located inside the second frame.

[0013] Based on the above technical solutions, preferably, one of the insertion slots on the top surface and the other on the bottom surface extends downward from the top surface and the other extends upward from the bottom surface; the insertion slots within the second frame body extend in the same direction as the insertion slots on the top surface or the bottom surface.

[0014] Based on the above technical solutions, preferably, the insertion slot is obtained by cutting a first rectangular groove downward from the surface of the first horizontal plate, and both the top and bottom of the first horizontal plate are provided with a 45-degree right-angle cut; the insertion part is obtained by cutting a 45-degree right-angled triangular groove downward from the surface of the top and bottom second horizontal plates, or by cutting a second rectangular groove downward from the surface of the second horizontal plate inside the second frame, wherein the hypotenuse of the right-angled triangular groove is in contact with the end face of the top second horizontal plate or the end face of the bottom second horizontal plate, and the bottom surface of the second rectangular groove abuts against the end face of the first horizontal plate located inside the first frame.

[0015] Based on the above technical solutions, preferably, one of the insertion slots on the top surface and the other on the bottom surface extends downward from the top surface and the other extends upward from the bottom surface; the insertion slots within the first frame body extend in the same direction as the insertion slots on the top surface and the bottom surface.

[0016] Based on the above technical solutions, preferably, there are two insertion slots located in the first frame or the second frame. One of the insertion slots extends in the same direction as the insertion slot on the top surface, and the other insertion slot extends in the same direction as the insertion slot on the bottom surface.

[0017] Based on the above technical solutions, preferably, the number of the first horizontal plate and the second horizontal plate are the same, the number of the first horizontal plate is n, and the sum of the number of welds corresponding to the first joint and the second joint is 2×(n-2).

[0018] Based on the above technical solutions, preferably, the first side beam and the second side beam form a third joint on the outer ring, and the third joint is connected by welding.

[0019] The battery pack box side beam splicing structure of this utility model has the following advantages over the prior art:

[0020] (1) The first horizontal plate and the second horizontal plate are overlapped and joined together. The end face of at least one of the first horizontal plates in the first frame abuts against the inner side of the second vertical plate to form a first joint. The end face of at least one of the second horizontal plates in the second frame abuts against the inner side of the first vertical plate to form a second joint. The first joint and the second joint are connected by welding. The first horizontal plate and the second horizontal plate are staggered and overlapped to increase the strength of the splicing position in the z direction. The connection strength is improved by increasing the weld seam, and the weld seam cracking failure is avoided, which ultimately leads to low strength and poor air tightness of the battery pack structure.

[0021] (2) The first horizontal plate and the second horizontal plate are provided with a plug-in part and a plug-in groove, respectively. The plug-in part and the plug-in groove are plugged in to achieve the overlap of the first horizontal plate and the second horizontal plate, which facilitates welding.

[0022] (3) Since the height of the plug-in part and the plug-in groove are both half the thickness of the first horizontal plate, after the plug-in part and the plug-in groove are engaged, the top and bottom surfaces of the first horizontal plate and the second horizontal plate are flush, which facilitates the assembly of the two. Furthermore, the first joint and the second joint are located on the same plane, which facilitates continuous welding and improves welding efficiency.

[0023] (4) The insertion slot is obtained by cutting a first rectangular groove downward from the surface of the second horizontal plate, and the second horizontal plate at the top and bottom are provided with a 45-degree right angle cut; the insertion part is obtained by cutting a 45-degree right angle triangular groove downward from the surface of the first horizontal plate at the top and bottom, or by cutting a second rectangular groove downward from the surface of the first horizontal plate in the first frame. The hypotenuse of the right angle triangular groove is in contact with the end face of the second horizontal plate at the top or the end face of the second horizontal plate at the bottom, and the bottom surface of the second rectangular groove abuts against the end face of the second horizontal plate located in the second frame, thereby obtaining the first joint and the second joint, which is convenient for welding;

[0024] (5) The insertion slots on the top surface and the bottom surface are connected, one of which extends downward from the top surface and the other extends upward from the bottom surface; the insertion slots in the second frame body extend in the same direction as the insertion slots on the top surface or the bottom surface, so that the first horizontal plate and the second horizontal plate have been preliminarily clamped and positioned before welding, which facilitates welding operations and improves reliability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of the battery pack box side beam splicing structure of this utility model;

[0027] Figure 2 This is an exploded view of the battery pack box side beam splicing structure according to an embodiment of the present invention;

[0028] Figure 3 For the present utility model Figure 2 Enlarged view of part A in the middle;

[0029] Figure 4 This is a perspective view of the first side beam of this utility model from a top viewpoint;

[0030] Figure 5 This is a perspective view of the first side beam of this utility model from the bottom view.

[0031] Figure 6 This is a perspective view of the second side beam of this utility model from a top viewpoint;

[0032] Figure 7 This is a perspective view of the second side beam of this utility model from the bottom view.

[0033] Figure 8 This is a cross-sectional view of the splicing of the first and second side beams of this utility model;

[0034] Figure 9 This is an exploded view of the battery pack box side beam splicing structure according to another embodiment of the present invention;

[0035] Figure 10 For the present utility model Figure 9 A magnified view of part B in the middle.

[0036] Explanation of reference numerals in the attached diagram: 1 - First side beam, 2 - Second side beam;

[0037] 100-Plug-in part, 200-Plug-in slot, 300-First rectangular slot, 400-Right-angled triangular slot, 500-Second rectangular slot, 600-Right-angled chamfer;

[0038] 11-First horizontal plate, 12-First vertical plate, 13-First frame;

[0039] 21-Second horizontal plate, 22-Second vertical plate, 23-Second frame. Detailed Implementation

[0040] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0041] Reference Figures 1-10 As shown in the embodiment of this utility model, a battery pack housing side beam splicing structure is proposed, including a first side beam 1 and a second side beam 2, wherein:

[0042] The first side beam 1 includes at least three horizontally arranged first horizontal plates 11 and two vertically arranged first vertical plates 12. The at least three first horizontal plates 11 are parallel and spaced apart, with the spacing direction being the extension direction of the first vertical plates 12. The two first horizontal plates 11 and the two first vertical plates 12 form a first frame 13 with a rectangular cross-section. At least one additional first horizontal plate 11 is disposed within the first frame 13. The at least three first horizontal plates 11 are parallel to each other, and the two ends of the first horizontal plates 11 are respectively connected to the two first vertical plates 12.

[0043] The second side beam 2 includes at least three horizontally arranged second horizontal plates 21 and two vertically arranged second vertical plates 22. The at least three second horizontal plates 21 are parallel and spaced apart, with the spacing direction being the extension direction of the second vertical plates 22. The two second horizontal plates 21 and the two second vertical plates 22 form a second frame 23 with a rectangular cross-section. At least one additional second horizontal plate 21 is disposed within the second frame 23. The at least three second horizontal plates 21 are parallel to each other, and the two ends of the second horizontal plates 21 are respectively connected to the two second vertical plates 22.

[0044] The first horizontal plate 11 and the second horizontal plate 21 overlap and fit together. At least one end face of the first horizontal plate 11 located within the first frame 13 abuts against the inner side of the second vertical plate 22 to form a first joint. At least one end face of the second horizontal plate 21 located within the second frame 23 abuts against the inner side of the first vertical plate 12 to form a second joint. The first joint and the second joint are connected by welding. After the first side beam 1 and the second side beam 2 are spliced, the end face of the first horizontal plate 11 located within the first frame 13 abuts against the inner side of the second vertical plate 22 located outside the second side beam 2. The end face of the second horizontal plate 21 located within the second frame 23 abuts against the inner side of the first vertical plate 12 located outside the first side beam 1. After splicing, fusion welding is performed from the outer side of the first vertical plate 12 and the outer side of the second vertical plate 22 to achieve the welding of the first joint and the second joint.

[0045] The battery pack box side beam splicing structure proposed in this embodiment uses the first horizontal plate 11 and the second horizontal plate 21 to overlap and cooperate. The end face of at least one of the first horizontal plates 11 located in the first frame 13 abuts against the inner side of the second vertical plate 22 to form a first joint. The end face of at least one of the second horizontal plates 21 located in the second frame 23 abuts against the inner side of the first vertical plate 12 to form a second joint. The first joint and the second joint are connected by welding. The first horizontal plate 11 and the second horizontal plate 21 are staggered and overlapped to increase the strength of the splicing position in the z direction. The connection strength is improved by increasing the weld, avoiding the situation where the weld cracks and fails, which ultimately leads to low battery pack structural strength and poor air tightness.

[0046] In some embodiments, such as Figure 2 and Figure 3As shown, the first horizontal plate 11 is provided with a plug-in portion 100, and the second horizontal plate 21 is provided with a plug-in groove 200. The plug-in portion 100 and the plug-in groove 200 are plugged into each other. The plug-in groove 200 is obtained by cutting a first rectangular groove 300 downward from the surface of the second horizontal plate 21, and the second horizontal plate 21 at the top and bottom are both provided with a 45-degree right-angled chamfer 600. The plug-in portion 100 is obtained by cutting a 45-degree right-angled triangular groove 400 downward from the surface of the first horizontal plate 11 at the top and bottom, or by cutting a second rectangular groove 500 downward from the surface of the first horizontal plate 11 inside the first frame 13. The hypotenuse of the right-angled triangular groove 400 is attached to the end face of the second horizontal plate 21 at the top or bottom, and the bottom surface of the second rectangular groove 500 abuts against the end face of the second horizontal plate 21 located inside the second frame 23.

[0047] In a further embodiment, the insertion slot 200 on the top surface and the insertion slot 200 on the bottom surface, one extending downwards from the top surface and the other extending upwards from the bottom surface; the insertion slot 200 within the second frame 23 extends in the same direction as the insertion slot 200 on the top surface or the insertion slot 200 on the bottom surface. Through the above arrangement, the first horizontal plate 11 and the second horizontal plate 21 are initially clamped and positioned before welding, facilitating welding operations and improving reliability.

[0048] In other embodiments, such as Figure 9 and Figure 10 As shown, the first horizontal plate 11 is provided with a plug-in portion 100, and the second horizontal plate 21 is provided with a plug-in groove 200. The plug-in portion 100 and the plug-in groove 200 are plugged into each other. The plug-in groove 200 is obtained by cutting a first rectangular groove 300 downward from the surface of the first horizontal plate 11, and the first horizontal plate 11 at the top and bottom are both provided with a 45-degree right-angled chamfer 600. The plug-in portion 100 is obtained by cutting a 45-degree right-angled triangular groove 400 downward from the surface of the second horizontal plate 21 at the top and bottom, or by cutting a second rectangular groove 500 downward from the surface of the second horizontal plate 21 inside the second frame 23. The hypotenuse of the right-angled triangular groove 400 is attached to the end face of the second horizontal plate 21 at the top or bottom, and the bottom surface of the second rectangular groove 500 abuts against the end face of the first horizontal plate 11 located inside the first frame 13.

[0049] In a further embodiment, the insertion slot 200 on the top surface and the insertion slot 200 on the bottom surface, one extending downwards from the top surface and the other extending upwards from the bottom surface; the insertion slot 200 within the first frame 13 extends in the same direction as the insertion slots 200 on the top and bottom surfaces. This arrangement ensures that the first horizontal plate 11 and the second horizontal plate 21 are initially clamped and positioned before welding, facilitating welding operations and improving reliability.

[0050] In some embodiments, the height of both the insertion part 100 and the insertion slot 200 is half the thickness of the first horizontal plate 11. After the insertion part 100 and the insertion slot 200 are engaged, the top and bottom surfaces of the first horizontal plate 11 and the second horizontal plate 21 are flush, which facilitates their assembly. Furthermore, the first joint and the second joint are located on the same plane, which facilitates continuous welding and improves welding efficiency.

[0051] In some embodiments, there are two insertion slots 200 located within the first frame 13 or the second frame 23. One insertion slot 200 extends in the same direction as the insertion slot 200 on the top surface, and the other insertion slot 200 extends in the same direction as the insertion slot 200 on the bottom surface. This arrangement ensures that the insertion slots 200 are symmetrically arranged, resulting in a tighter interlocking structure and improved reliability and stability of the device.

[0052] In some embodiments, the number of the first horizontal plate 11 and the second horizontal plate 21 is the same, the number of the first horizontal plate 11 is n, and the sum of the number of welds corresponding to the first joint and the second joint is 2×(n-2). For example, if the number of the first horizontal plate 11 is 4, and the sum of the number of welds corresponding to the first joint and the second joint is 4, then 4 welds can be added. The number of welds can be set according to specific strength requirements.

[0053] In some embodiments, the first side beam 1 and the second side beam 2 form a third joint on the outer ring, and the third joint is connected by welding. After the first side beam 1 and the second side beam 2 are spliced, a third joint will be formed on the outer ring, and the third joint will be fully welded.

[0054] The working principle of the battery pack box side beam splicing structure is as follows: the insertion part 100 is obtained by cutting a right-angled triangular groove 400 at a 45-degree angle downward from the surface of the first horizontal plate 11 at the top and bottom, or by cutting a second rectangular groove 500 downward from the surface of the first horizontal plate 11 inside the first frame 13. The hypotenuse of the right-angled triangular groove 400 is in contact with the end face of the second horizontal plate 21 at the top or bottom. The bottom surface of the second rectangular groove 500 abuts against the end face of the second horizontal plate 21 located inside the second frame 23. The first horizontal plate 11 and the second horizontal plate 21 are staggered and overlapped. The first joint and the second joint are fused and welded from the outer side of the first vertical plate 12 and the outer side of the second vertical plate 22, which increases the overall weld length and improves the connection strength.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery pack housing side beam splicing structure, characterized in that, Includes the first side beam (1) and the second side beam (2), wherein: The first side beam (1) includes at least three first horizontal plates (11) and two first vertical plates (12). The at least three first horizontal plates (11) are arranged in parallel and spaced apart, with the direction of the spacing being the extension direction of the first vertical plate (12). The two first horizontal plates (11) and the two first vertical plates (12) form a first frame (13) with a rectangular cross section. At least one other first horizontal plate (11) is disposed inside the first frame (13). The second side beam (2) includes at least three second horizontal plates (21) and two second vertical plates (22). The at least three second horizontal plates (21) are arranged in parallel and spaced apart, with the direction of the spacing being the extension direction of the second vertical plates (22). The two second horizontal plates (21) and the two second vertical plates (22) form a second frame (23) with a rectangular cross section. At least one additional second horizontal plate (21) is disposed within the second frame (23). The first horizontal plate (11) and the second horizontal plate (21) overlap and cooperate. The end face of at least one of the first horizontal plates (11) located in the first frame (13) abuts against the inner side of the second vertical plate (22) to form a first joint. The end face of at least one of the second horizontal plates (21) located in the second frame (23) abuts against the inner side of the first vertical plate (12) to form a second joint. The first joint and the second joint are connected by welding.

2. The battery pack box side beam splicing structure as described in claim 1, characterized in that, The first horizontal plate (11) and the second horizontal plate (21) are provided with a plug-in part (100) and a plug-in groove (200), respectively, wherein the plug-in part (100) and the plug-in groove (200) are plugged into each other.

3. The battery pack box side beam splicing structure as described in claim 2, characterized in that, The height of both the plug-in portion (100) and the plug-in slot (200) is half the thickness of the first horizontal plate (11).

4. The battery pack box side beam splicing structure as described in claim 3, characterized in that, The insertion slot (200) is obtained by cutting a first rectangular slot (300) downward from the surface of the second horizontal plate (21), and the second horizontal plate (21) at the top and bottom are both provided with a 45-degree right angle cut (600); the insertion part (100) is obtained by cutting a 45-degree right angle triangular slot (400) downward from the surface of the first horizontal plate (11) at the top and bottom, or by cutting a second rectangular slot (500) downward from the surface of the first horizontal plate (11) in the first frame (13), the hypotenuse of the right angle triangular slot (400) is in contact with the end face of the second horizontal plate (21) at the top or the end face of the second horizontal plate (21) at the bottom, and the bottom surface of the second rectangular slot (500) abuts against the end face of the second horizontal plate (21) located in the second frame (23).

5. The battery pack box side beam splicing structure as described in claim 4, characterized in that, The top surface insertion slot (200) and the bottom surface insertion slot (200) have one extending downward from the top surface and the other extending upward from the bottom surface; the insertion slot (200) in the second frame (23) extends in the same direction as the top surface insertion slot (200) or the bottom surface insertion slot (200).

6. The battery pack box side beam splicing structure as described in claim 3, characterized in that, The insertion slot (200) is obtained by cutting a first rectangular groove (300) downward from the surface of the first horizontal plate (11), and the first horizontal plate (11) at the top and bottom are both provided with a 45-degree right angle cut (600); the insertion part (100) is obtained by cutting a 45-degree right angle triangular groove (400) downward from the surface of the second horizontal plate (21) at the top and bottom, or by cutting a second rectangular groove (500) downward from the surface of the second horizontal plate (21) inside the second frame (23), the hypotenuse of the right angle triangular groove (400) is in contact with the end face of the second horizontal plate (21) at the top or the end face of the second horizontal plate (21) at the bottom, and the bottom surface of the second rectangular groove (500) abuts against the end face of the first horizontal plate (11) located inside the first frame (13).

7. The battery pack box side beam splicing structure as described in claim 6, characterized in that, The top surface insertion slot (200) and the bottom surface insertion slot (200) have one extending downward from the top surface and the other extending upward from the bottom surface; the insertion slot (200) in the first frame (13) extends in the same direction as the top surface insertion slot (200) and the bottom surface insertion slot (200).

8. The battery pack box side beam splicing structure as described in claim 5 or 7, characterized in that, There are two insertion slots (200) located in the first frame (13) or the second frame (23). One of the insertion slots (200) extends in the same direction as the insertion slot (200) on the top surface, and the other insertion slot (200) extends in the same direction as the insertion slot (200) on the bottom surface.

9. The battery pack box side beam splicing structure as described in claim 1, characterized in that, The number of the first horizontal plate (11) and the second horizontal plate (21) are the same. The number of the first horizontal plate (11) is n. The sum of the number of welds corresponding to the first joint and the second joint is 2×(n-2).

10. The battery pack casing side beam splicing structure as described in any one of claims 1-7, characterized in that, The first side beam (1) and the second side beam (2) form a third joint on the outer ring, and the third joint is connected by welding.

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