Edge beam structure and battery pack with same

Abstract

The utility model provides a boundary beam structure and a battery pack with the same, the boundary beam structure is suitable for being connected with a lower box body, the boundary beam structure is integrally bent and formed, a first cavity, a second cavity and a third cavity are formed in the boundary beam structure, the first cavity, the second cavity and the third cavity are adjacent in pairs, and the first cavity, the second cavity and the third cavity are arranged in the boundary beam structure. And the cross section of at least one cavity is triangular. According to the boundary beam structure disclosed by the utility model, the cavity is arranged, and the cross-sectional inertia moment of the boundary beam structure can be increased by the cavity, so that the bending deformation resistance of the boundary beam structure can be improved, meanwhile, the use amount of materials can be reduced, the production cost can be effectively reduced, and the weight of a battery pack can also be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack manufacturing technical field especially is related to a kind of edge beam structure and the battery pack with it. BACKGROUND

[0002] The edge beam structure in prior art is simply processed and formed, so that the strength of the edge beam structure is too low, and the ability of the edge beam structure to resist bending deformation cannot be guaranteed. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides an edge beam structure, which can guarantee the ability to resist bending deformation.

[0004] The utility model further provides a battery pack with the above edge beam structure.

[0005] According to the edge beam structure of the first aspect of the utility model, the edge beam structure is integrally bent and formed, the first cavity, the second cavity and the third cavity are formed in the edge beam structure, the first cavity, the second cavity and the third cavity are adjacent to each other in pairs, and the cross section of at least one cavity is triangular.

[0006] According to the edge beam structure of the utility model, the cavity is provided, the cavity can increase the cross-sectional moment of inertia of the edge beam structure, so that the ability of the edge beam structure to resist bending deformation can be improved, at the same time, the use amount of material can be reduced, the production cost can be effectively reduced, and the weight of the battery pack can be reduced.

[0007] According to some embodiments of the utility model, the edge beam structure comprises a first section, a second section and a third section, the first section, the second section and the third section are sequentially connected end to end, and the first section, the second section and the third section enclose the first cavity, and the cross section of the first cavity is triangular.

[0008] According to some optional embodiments of the utility model, a first connecting section is provided between the first section and the second section, two ends of the first connecting section are connected to the first section and the second section respectively, and the included angle between the first connecting section and the first section is 120°-150°.

[0009] According to some embodiments of the utility model, one end of the first section away from the second section is formed with a first flange, the first section is connected to the third section through the first flange, and / or the connection length of the first flange and the third section is greater than or equal to 5mm.

[0010] According to some embodiments of the utility model, the edge beam structure comprises: a fourth section, a fifth section, a sixth section and a seventh section, the fourth section is connected with the third section, the fourth section, the fifth section, the sixth section and the seventh section are connected in sequence, and the seventh section is connected in the two ends of the fourth section, the fourth section, the fifth section, the sixth section and the seventh section enclose the second cavity, and the second cavity is adjacent to the first cavity.

[0011] According to some optional embodiments of the utility model, a second connecting section is arranged between the sixth section and the seventh section, and the included angle between the second connecting section and the sixth section is 120°-150°.

[0012] According to some optional embodiments of the utility model, a first connecting section is arranged between the first section and the second section, the second connecting section is fixedly connected with the first connecting section, and the connecting length of the second connecting section and the first connecting section is greater than or equal to 3mm.

[0013] According to some embodiments of the utility model, the first section, the third section, the fourth section and the seventh section enclose the third cavity, and the sum of the height of the first cavity and the third cavity is at least greater than or equal to 1.5 times the height of the second cavity.

[0014] According to some optional embodiments of the utility model, one end of the seventh section away from the sixth section is formed with a second flange, the seventh section is connected with the fourth section through the second flange, and / or the connecting length of the second flange and the fourth section is greater than or equal to 5mm.

[0015] The battery pack according to the second aspect of the embodiments of the utility model comprises the edge beam structure according to the first aspect of the utility model.

[0016] According to the battery pack of the utility model, by arranging the edge beam structure of the first aspect of the embodiments, the cavity is arranged, the cavity can increase the section inertia moment of the edge beam structure, so that the ability of the edge beam structure to resist bending deformation can be improved, meanwhile, the use amount of materials can be reduced, the production cost is effectively reduced, and the weight of the battery pack can be reduced.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the schematic view of the edge beam structure according to the embodiments of the utility model.

[0019] Reference signs:

[0020] 100, edge beam structure;

[0021] 11, first segment; 111, first flange; 12, second segment; 13, third segment; 14, fourth segment; 15, fifth segment; 16, sixth segment; 17, seventh segment; 171, second flange;

[0022] 21, first connecting segment; 22, second connecting segment;

[0023] 31, first cavity; 32, second cavity; 33, third cavity. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] The drawings are referred to below Figure 1 The edge beam structure 100 according to the embodiments of the present application is described below.

[0026] Referring to Figure 1 The edge beam structure 100 according to the embodiments of the present application is adapted to be connected with a lower cabinet, and the edge beam structure 100 is integrally bent and formed, and the first cavity 31, the second cavity 32 and the third cavity 33 are formed in the edge beam structure 100, the first cavity 31, the second cavity 32 and the third cavity 33 are adjacent to each other, and the cross section of at least one cavity is triangular, that is, the cross section of one, two or three cavities can be triangular.

[0027] Preferably, the edge beam structure 100 is an integrally formed sheet metal part, which can facilitate the processing of the edge beam structure 100 and ensure the structural strength of the edge beam structure 100.

[0028] The edge beam structure 100 of the present application is provided with cavities, which can increase the cross-sectional moment of inertia of the edge beam structure 100, thereby improving the ability of the edge beam structure 100 to resist bending deformation, and the edge beam structure 100 can maintain lightweight while achieving high load-carrying capacity, and at the same time, the cross section of the cavity is triangular, the triangular structure is stable, and when force acts on the triangle, it can effectively disperse the force to three sides, reducing the occurrence of local stress concentration phenomenon, therefore, the introduction of triangular cavities in the edge beam structure 100 can significantly improve the stability and deformation resistance of the overall structure.

[0029] In addition, two adjacent cavities can support each other through the wall plate to form a more stable structure system, while the use amount of material can be reduced, the production cost can be effectively reduced, and the weight of the battery pack can be reduced.

[0030] According to the edge beam structure 100 of the embodiment of the utility model, the cavity is arranged, the cavity can increase the section inertia moment of the edge beam structure 100, thereby the ability of the edge beam structure 100 to resist bending deformation can be improved, while the use amount of material can be reduced, the production cost can be effectively reduced, and the weight of the battery pack can be reduced.

[0031] According to some embodiments of the utility model, referring to Figure 1 , the edge beam structure 100 includes: a first section 11, a second section 12 and a third section 13, the first section 11, the second section 12 and the third section 13 are sequentially connected end to end, and the first section 11, the second section 12 and the third section 13 enclose a first cavity 31, and the cross section of the first cavity 31 is triangular.

[0032] In this way, the edge beam structure 100 is arranged in sections, so that the edge beam structure 100 can enclose a cavity with a triangular cross section, and the section of the edge beam structure 100 can be realized by bending processing, which is simple and can effectively improve the processing efficiency.

[0033] For example, as shown in Figure 1 , the first section 11 extends along the left-right direction, the second section 12 extends obliquely from the lower left to the upper right, and the third section 13 extends along the up-down direction, the right end of the first section 11 is connected with the third section 13, the left end of the first section 11 is connected with the left end of the second section 12, and the right end of the second section 12 is connected with the upper end of the third section 13.

[0034] According to some optional embodiments of the utility model, referring to Figure 1 , a first connecting section 21 is arranged between the first section 11 and the second section 12, the two ends (such as the lower end and the upper end of the first connecting section 21 shown in Figure 1 ) of the first connecting section 21 are connected with the first section 11 and the second section 12 respectively, and the included angle between the first connecting section 21 and the first section 11 is 120°-150°. Thus, the first connecting section 21 can facilitate the connection of the first section 11 and the second section 12, thereby avoiding damage caused by the excessive bending angle at the connection between the first section 11 and the second section 12, and further ensuring the connection strength of the first section 11 and the second section 12, while limiting the included angle between the first connecting section 21 and the first section 11 can avoid the difficulty in connecting the first section 11 and the second section 12 caused by the excessive included angle between the first connecting section 21 and the first section 11, and can also avoid the fracture at the connection between the first connecting section 21 and the first section 11 caused by the small included angle between the first connecting section 21 and the first section 11.

[0035] For example, as shown in Figure 1 the first connecting section 21 is inclined to extend in a direction from right down to left up, the lower end of the first connecting section 21 is connected with the first section 11, the upper end of the first connecting section 21 is connected with the second section 12, and the included angle between the first connecting section 21 and the first section 11 can be 120°, 125°, 130°, 135°, 140°, 145° or 150°.

[0036] Preferably, the bending radius of the first connecting section 21 and the first section 11 is greater than or equal to 4mm, so that the normal bending of the first connecting section 21 can be ensured.

[0037] Further, as shown in Figure 1 the bending angle between the first connecting section 21 and the second section 12 is greater than or equal to 70°. Thus, the normal connection between the first connecting section 21 and the second section 12 can be ensured.

[0038] Further, as shown in Figure 1 the included angle between the second section 12 and the third section 13 is 62°. Thus, the normal connection between the second section 12 and the third section 13 can be ensured, and the first section 11, the second section 12 and the third section 13 can define the first cavity 31 with a triangular cross section.

[0039] According to some embodiments of the present application, referring to Figure 1 the end of the first section 11 away from the second section 12 (for example, the right end of the first section 11 as shown in Figure 1 ) is formed with a first flange 111, and the first section 11 is connected with the third section 13 through the first flange 111. Thus, the connection between the first section 11 and the third section 13 can be facilitated, so that the connection time of the first section 11 and the third section 13 can be saved, and the connection efficiency can be improved.

[0040] For example, as shown in Figure 1 the right end of the first section 11 is provided with the first flange 111, and the first flange 111 extends in the up-down direction.

[0041] Further, as shown in Figure 1 the connection length of the first flange 111 and the third section 13 is greater than or equal to 5mm. Thus, the connection length of the first flange 111 and the third section 13 can be prevented from being too long to increase the production cost of the edge beam structure 100, and the connection length of the first flange 111 and the third section 13 can be prevented from being too short to affect the connection strength of the first section 11 and the third section 13.

[0042] For example, as shown in Figure 1 the connection length of the first flange 111 and the third section 13 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm.

[0043] According to some embodiments of the present application, referring to Figure 1 , the edge beam structure 100 comprises: a fourth section 14, a fifth section 15, a sixth section 16 and a seventh section 17, the fourth section 14 is connected with the third section 13, the fourth section 14, the fifth section 15, the sixth section 16 and the seventh section 17 are connected in sequence, and the seventh section 17 is connected in the two ends of the fourth section 14 (such as the left end and the right end of the fourth section 14 shown in the figure), the fourth section 14, the fifth section 15, the sixth section 16 and the seventh section 17 enclose the second cavity 32, and the second cavity 32 is adjacent to the first cavity 31. Figure 1

[0044] In this way, the second cavity 32 is directly enclosed by the fourth section 14, the fifth section 15, the sixth section 16 and the seventh section 17, without the need for additional processing of the second cavity 32, thereby reducing the processing steps of the edge beam structure 100, improving the processing efficiency, and at the same time, improving the functional integration of the fourth section 14, the fifth section 15, the sixth section 16 and the seventh section 17. In addition, the second cavity 32 cooperates with the first cavity 31 to jointly bear the force applied by other structures to the edge beam structure 100, thereby ensuring the stability and anti-deformation ability of the edge beam structure 100.

[0045] For example, as shown in the figure Figure 1 , the fourth section 14 extends along the left-right direction, the right end of the fourth section 14 is connected with the lower end of the third section 13, the fifth section 15 extends along the up-down direction, the lower end of the fifth section 15 is connected with the left end of the fourth section 14, the sixth section 16 extends along the left-right direction, and the sixth section 16 is located on the upper side of the fourth section 14, the upper end of the fifth section 15 is connected with the left end of the sixth section 16, the seventh section 17 extends along the up-down direction, and the seventh section 17 is located on the right side of the fifth section 15, the upper end of the seventh section 17 is connected with the right end of the sixth section 16, and the lower end of the seventh section 17 is connected with the middle position of the fourth section 14 in the left-right direction.

[0046] According to some optional embodiments of the present application, referring to Figure 1 , a second connecting section 22 is arranged between the sixth section 16 and the seventh section 17, and the included angle between the second connecting section 22 and the sixth section 16 is 120°-150°. Thus, the second connecting section 22 can facilitate the connection of the sixth section 16 and the seventh section 17, thereby avoiding damage caused by excessive bending angle at the connection between the sixth section 16 and the seventh section 17, and further ensuring the connection strength of the sixth section 16 and the seventh section 17. At the same time, by limiting the included angle between the second connecting section 22 and the sixth section 16, it can avoid the difficulty in connecting the sixth section 16 and the seventh section 17 caused by the too large included angle between the second connecting section 22 and the sixth section 16, and also avoid the fracture at the connection between the second connecting section 22 and the sixth section 16 caused by the too small included angle between the second connecting section 22 and the sixth section 16.

[0047] For example, as shown in the figure Figure 1 ​As shown, the second connecting section 22 extends obliquely in a direction from lower right to upper left, the lower end of the second connecting section 22 is connected with the seventh section 17, the upper end of the second connecting section 22 is connected with the right end of the sixth section 16, and the included angle between the second connecting section 22 and the sixth section 16 can be 120°, 125°, 130°, 135°, 140°, 145° or 150°. Preferably, the bending radius of the second connecting section 22 and the sixth section 16 is greater than or equal to 4 mm, so that the second connecting section 22 can be normally bent.

[0048] Further, as shown in Figure 1 , the included angle between the third section 13 and the fourth section 14 is 90°, the included angle between the fourth section 14 and the fifth section 15 is 90°, and the included angle between the fifth section 15 and the sixth section 16 is 90°. Thus, the bending processing of the fourth section 14, the fifth section 15 and the sixth section 16 can be facilitated, and the edge beam structure 100 can be effectively prevented from being broken.

[0049] Further, as shown in Figure 1 , the length L1 of the fourth section 14 is greater than or equal to 80 mm, the sum of the lengths of the sixth section 16 and the second connecting section 22 in the left-right direction is L2, the length from the third section 13 to the right end of the second connecting section 22 is L3, L2 and L3 satisfy the formula: L3+L2=L1, and L3≥2L2. Thus, the structural strength of the edge beam structure 100 can be ensured, the edge beam structure 100 can be effectively prevented from being damaged, and the stability of the edge beam structure 100 and the whole vehicle can also be ensured.

[0050] According to some optional embodiments of the present application, referring to Figure 1 , the first connecting section 21 is arranged between the first section 11 and the second section 12, the second connecting section 22 is fixedly connected with the first connecting section 21, and the connection length of the second connecting section 22 and the first connecting section 21 is greater than or equal to 3 mm. Thus, the second connecting section 22 is connected with the first connecting section 21, the overall strength of the edge beam structure 100 can be enhanced, the anti-deformation capability of the edge beam structure 100 can be effectively improved, and the connection length of the second connecting section 22 and the first connecting section 21 is limited, so that the cost increase caused by the excessively long connection length can be avoided, and the influence of the excessively short connection length on the connection strength can also be avoided.

[0051] For example, as shown in Figure 1 , the connection length of the second connecting section 22 and the first connecting section 21 can be 3 mm, 4 mm, 5 mm, 6 mm or 7 mm.

[0052] Further, as shown in Figure 1 , the second connecting section 22 and the second section 12 can reduce the height difference between the welding position of the second connecting section 22 and the first connecting section 21 and the connection position of the first flanging 111 and the third section 13, so that the welding strength can be improved and the failure risk of the welding position can be reduced.

[0053] Furthermore, if Figure 1 As shown, the position and length of the first connecting segment 21 can be determined by the length of the sixth segment 16 and the bending angle between the second connecting segment 22 and the sixth segment 16, and the position and length of the second segment 12 can be determined by the length of the first segment 11 and the bending angle between the first connecting segment 21 and the second segment 12 and the bending angle between the second segment 12 and the third segment 13.

[0054] According to some embodiments of the present invention, referring to Figure 1 The first segment 11, the third segment 13, the fourth segment 14, and the seventh segment 17 enclose a third cavity 33. The sum of the heights of the first cavity 31 and the third cavity 33 is at least 1.5 times the height of the second cavity 32. Therefore, limiting the sum of the heights of the first cavity 31 and the third cavity 33 ensures the contact area between the side beam structure 100 and the lower box body, thereby ensuring the connection strength between the side beam structure 100 and the lower box body. Furthermore, the third cavity 33 does not need to be additionally machined, thereby reducing the number of processing steps and improving processing efficiency.

[0055] For example, Figure 1 As shown, the sum of the heights of the first cavity 31 and the third cavity 33 in the vertical direction is L4, and the height of the second cavity 32 in the vertical direction is L5. L5 is greater than or equal to 30 mm. Therefore, L4 can be: 45 mm, 46 mm, 47 mm, 48 mm, 49 mm or 50 mm.

[0056] According to some optional embodiments of the present invention, referring to Figure 1 , the seventh segment 17 is away from one end of the sixth segment 16 (such as Figure 1 The lower end of the seventh segment 17 is formed with a second flange 171, and the seventh segment 17 is connected to the fourth segment 14 via the second flange 171. This facilitates the connection of the seventh segment 17 with the fourth segment 14, thereby saving the connection time of the seventh segment 17 with the fourth segment 14 and improving the connection efficiency.

[0057] For example, Figure 1 As shown, the lower end of the seventh section 17 is provided with a second flange 171 , and the first flange 111 extends in the left-right direction.

[0058] Furthermore, if Figure 1 As shown, the connection length between the second flange 171 and the fourth section 14 is greater than or equal to 5 mm. This can prevent the connection length between the second flange 171 and the fourth section 14 from being too long, which would increase the production cost of the side beam structure 100. At the same time, it can also prevent the connection length between the second flange 171 and the fourth section 14 from being too short, which would affect the connection strength between the seventh section 17 and the fourth section 14.

[0059] For example, Figure 1As shown, the connection length between the second flange 171 and the fourth section 14 can be: 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm.

[0060] According to the battery pack of the second embodiment of the present invention, ​ , including the side beam structure 100 of the first aspect of this embodiment.

[0061] According to the battery pack of an embodiment of the present invention, by setting the side beam structure 100 of the above-mentioned first aspect embodiment and setting a cavity, the cavity can increase the cross-sectional inertia moment of the side beam structure 100, thereby improving the ability of the side beam structure 100 to resist bending deformation. At the same time, the amount of material used can be reduced, the production cost can be effectively reduced, and the weight of the battery pack can be reduced.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0064] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0065] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0066] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A side beam structure, which is suitable for connecting with a lower box body, characterized in that: The side beam structure is integrally bent and formed, and a first cavity, a second cavity and a third cavity are formed in the side beam structure. The first cavity, the second cavity and the third cavity are adjacent to each other, and the cross section of at least one cavity is triangular.

2. The side beam structure according to claim 1, characterized in that: include: The first section, the second section and the third section are connected end to end in sequence, and the first section, the second section and the third section enclose a first cavity, and the cross section of the first cavity is a triangle.

3. The side beam structure according to claim 2, characterized in that: A first connecting section is provided between the first section and the second section. Two ends of the first connecting section are respectively connected to the first section and the second section. An angle between the first connecting section and the first section is 120°-150°.

4. The side beam structure according to claim 2, characterized in that: A first flange is formed at one end of the first section away from the second section, the first section is connected to the third section via the first flange, and / or the connection length between the first flange and the third section is greater than or equal to 5 mm.

5. The side beam structure according to claim 2, characterized in that: include: The fourth segment, the fifth segment, the sixth segment and the seventh segment, the fourth segment is connected to the third segment, the fourth segment, the fifth segment, the sixth segment and the seventh segment are connected in sequence, and the seventh segment is connected to both ends of the fourth segment, the fourth segment, the fifth segment, the sixth segment and the seventh segment enclose the second cavity, and the second cavity is adjacent to the first cavity.

6. The side beam structure according to claim 5, characterized in that: A second connecting section is provided between the sixth section and the seventh section, and an included angle between the second connecting section and the sixth section is 120°-150°.

7. The side beam structure according to claim 6, characterized in that: A first connecting segment is provided between the first segment and the second segment. The second connecting segment is fixedly connected to the first connecting segment. The connection length between the second connecting segment and the first connecting segment is greater than or equal to 3 mm.

8. The side beam structure according to claim 5, characterized in that: The first section, the third section, the fourth section and the seventh section enclose the third cavity, and the sum of the heights of the first cavity and the third cavity is at least greater than or equal to 1.5 times the height of the second cavity.

9. The side beam structure according to claim 8, characterized in that: A second flange is formed at one end of the seventh segment away from the sixth segment, and the seventh segment is connected to the fourth segment via the second flange, and / or the connection length between the second flange and the fourth segment is greater than or equal to 5 mm.

10. A battery pack, characterized in that: The invention comprises the edge beam structure according to any one of claims 1 to 9.

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