Battery box and battery pack

Abstract

This application provides a battery box and a battery pack. The battery box includes a box body and a crossbeam. The box body includes a bottom and side walls, and the bottom and side walls enclose a cavity. The crossbeam is connected to the box body and is located inside the cavity, dividing the cavity into a first cavity and a second cavity distributed along a first direction. The first cavity is used to accommodate battery cells, and the second cavity is used to accommodate electrical modules. The crossbeam includes a clearance section and a reinforcing section arranged along its length direction. The height of the clearance section relative to the bottom is H1, and the height of the reinforcing section relative to the bottom is H2, wherein H1 < H2, thereby reducing the space occupied by the crossbeam in the cavity. For example, reducing the space occupied by the crossbeam in the cavity at the clearance section, so that wire harnesses, pipes, etc. connected between the first cavity and the second cavity can pass through the clearance section. That is, the clearance section of the crossbeam can avoid wire harnesses and pipes, improving the space utilization rate of the box body cavity.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery pack and battery box. Background Technology

[0002] In related technologies, the battery box body is generally formed by stamping thin plates, which results in relatively weak strength and cannot meet the strength requirements of a battery box. To improve the strength of the battery box, various reinforcing structures are usually incorporated into the body. However, the inclusion of these reinforcing structures occupies internal space, affecting the space utilization rate within the box. Utility Model Content

[0003] The embodiments of this application provide a battery pack and housing that can improve the technical problem of the space utilization rate of the battery box by setting a reinforcing structure inside the box.

[0004] In a first aspect, embodiments of this application provide a battery box, comprising:

[0005] The housing includes a bottom and side walls, wherein the bottom and the side walls enclose a cavity;

[0006] A crossbeam is connected to the housing. The crossbeam is located inside the cavity and divides the cavity into a first cavity and a second cavity distributed along a first direction. The first cavity is used to accommodate the battery cell, and the second cavity is used to accommodate the electrical module.

[0007] The crossbeam includes a clearance section and a reinforcing section arranged along its length. The clearance section is at a height of H1 relative to the bottom, and the reinforcing section is at a height of H2 relative to the bottom, wherein H1 < H2.

[0008] In one embodiment, the height of the sidewall relative to the bottom is H3, where 0.5 ≤ H2 / H3 ≤ 1.

[0009] In one embodiment, the crossbeam includes two reinforcing sections located at both ends of the clearance section along its length.

[0010] In one embodiment, the height H1 of the avoidance section relative to the bottom is ≥20mm.

[0011] In one embodiment, the length of the crossbeam is L1, and the length of the clearance section is L2, wherein L2 / L1≤0.8.

[0012] In one embodiment, the crossbeam includes a first body and first flanges located on both sides of the first body along the first direction, the first flanges being for connection to the bottom, the width of the first body in the first direction being W, wherein 25mm ≤ W ≤ 35mm; and / or,

[0013] The width of the avoidance section in the first direction is W1, and the width of the reinforcement section in the first direction is W2, wherein W1 > W2.

[0014] In one embodiment, the crossbeam includes a first body and first flanges located on both sides of the first body along the first direction, the first flanges being used to connect to the bottom, the width of the first flanges in the first direction being W3, wherein W3 ≥ 20 mm.

[0015] In one embodiment, the battery box further includes at least one side beam connected to the bottom and the side wall, the side beam, the bottom and the side wall enclosing a space extending along the first direction.

[0016] In one embodiment, the side beam includes a first reinforcing plate and a second reinforcing plate connected at an angle, the space being located between the first reinforcing plate and the corresponding side wall, and the space also being located between the second reinforcing plate and the bottom.

[0017] In one embodiment, a plurality of reinforcing portions are recessed at the connection between the first reinforcing plate and the second reinforcing plate, and the plurality of reinforcing portions are spaced apart along the length direction of the side beam.

[0018] In one embodiment, the side beam further includes a second flange connected to the corresponding side wall. The second flange includes connecting segments and spacer segments that are alternately distributed along the length direction of the side beam. The connecting segments are connected to the corresponding side wall, and the spacer segments are spaced apart from the corresponding side wall.

[0019] In one embodiment, the side walls of the box body along both sides of the second direction are respectively provided with the side beams, and the crossbeams extend along the second direction.

[0020] In one embodiment, the side beam is connected to the crossbeam.

[0021] In one embodiment, the battery box further includes a mounting plate disposed in the first cavity, the mounting plate being connected to the bottom, a support beam protruding from the side of the mounting plate opposite to the bottom, the support beam extending along the length direction of the side beam, and at least one support member being disposed between the support beam and the side beam.

[0022] In one embodiment, one end of the support member is connected to the side beam, and the other end of the support member is connected to the support beam.

[0023] In one embodiment, the side beam includes a second body that encloses the space formed by the bottom and the sidewall, the second body having a height of G1 relative to the bottom, and the end of the support member near the side beam having a height of G2 relative to the bottom, wherein 0 ≤ G1 - G2 ≤ ​​10 mm; and / or,

[0024] The height of the support beam relative to the bottom is G3, and the height of the end of the support member near the support beam relative to the bottom is G4, wherein 0≤G3-G4≤10mm.

[0025] In one embodiment, a plurality of support members are provided between the side beam and the corresponding support beam. The plurality of support members are spaced apart along the length direction of the side beam, and the distance between two adjacent support members is P, where 100mm≤P≤400mm.

[0026] Secondly, embodiments of this application provide a battery pack, including a battery case as described above, the battery case comprising:

[0027] The housing includes a bottom and side walls, wherein the bottom and the side walls enclose a cavity;

[0028] A crossbeam is connected to the housing. The crossbeam is located inside the cavity and divides the cavity into a first cavity and a second cavity distributed along a first direction. The first cavity is used to accommodate the battery cell, and the second cavity is used to accommodate the electrical module.

[0029] The crossbeam includes a clearance section and a reinforcing section arranged along its length. The clearance section is at a height of H1 relative to the bottom, and the reinforcing section is at a height of H2 relative to the bottom, wherein H1 < H2.

[0030] The beneficial effects of the embodiments of this application are as follows:

[0031] The battery box provided in this application embodiment strengthens the box body and improves its overall strength by incorporating a crossbeam within its cavity and connecting the crossbeam to the box body. Furthermore, the crossbeam divides the box body's cavity into a first cavity and a second cavity distributed along a first direction. The first cavity houses the battery cells, and the second cavity houses the electrical modules. This separation of the battery cells and electrical modules within the battery box's cavity enhances the safety of the battery pack.

[0032] Building upon this, the crossbeam is further modified by including a clearance section and a reinforcing section along its length, with the height H1 of the clearance section relative to the bottom being less than the height H2 of the reinforcing section relative to the bottom. This reduces the space occupied by the crossbeam within the cavity, for example, reducing the cavity space occupied by the crossbeam at the clearance section. This allows wiring harnesses and conduits connecting the first and second cavities to pass over the clearance section, meaning the clearance section of the crossbeam can avoid wiring harnesses and conduits, thus improving the space utilization of the enclosure. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery box provided in this application.

[0035] Figure 2 This is an exploded structural diagram of one embodiment of the battery box provided in this application.

[0036] Figure 3 A schematic diagram of the structure of one embodiment of the crossbeam provided in this application;

[0037] Figure 4 Another angle view of one embodiment of the beam provided in this application;

[0038] Figure 5 for Figure 1 A cross-sectional view along the AA direction;

[0039] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0040] Figure 7 This is a structural schematic diagram of one embodiment of the edge beam provided in this application.

[0041] Figure 8 This is a schematic diagram of the structure of one embodiment of the support provided in this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] Battery box 1; Box body 10; Bottom 11; Side wall 12; Cavity 100; First cavity 101; Second cavity 102; Crossbeam 20; Clearance section 21; Reinforcing section 22; Transition section 23; First body 200; First flange 201; Side beam 30; Space 300; First reinforcing plate 31; Second reinforcing plate 32; Second flange 33; Connecting section 331; Spacing section 332; Reinforcing part 34; Third flange 35; Second body 36; Mounting plate 40; Support beam 41; Support member 50; Rear beam 60; First direction X; Second direction Y; Height direction Z. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0045] This application provides a battery box and a battery pack. These will be described in detail below.

[0046] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery box provided in this application. Figure 1 As shown, the battery box 1 includes a box body 10 and a crossbeam 20. The box body 10 includes a bottom 11 and side walls 12, which together form a cavity 100. In some embodiments, the box body 10 can be integrally formed by a stamping and stretching process to form the bottom 11 and side walls 12 respectively. Depending on the shape of the bottom 11, the side walls 12 may include multiple sub-walls corresponding to different sides of the bottom 11. For example, when the bottom 11 is rectangular, the side walls 12 may include four sub-walls corresponding to the four sides of the rectangle. In some embodiments, the box body 10 can also be formed by splicing the separate bottom 11 and side walls 12. For example, the box body 10 can be formed by welding the bottom 11 and multiple side walls 12. This is not limited here.

[0047] The crossbeam 20 is connected to the housing 10 to improve the overall strength of the battery box 1. The crossbeam 20 can be connected to the bottom 11 of the housing 10 or to the side wall 12 of the housing 10. Of course, when the crossbeam 20 is connected to both the bottom 11 and the side wall 12 of the housing 10, the strengthening effect on the housing 10 is further improved, making the battery box 1 stronger and less prone to deformation. Specifically, the side of the crossbeam 20 facing the bottom 11 can be connected to the bottom 11. Both ends of the crossbeam 20 along its length are connected to the side walls 12 of the housing 10 on both sides along the second direction Y, so that the crossbeam 20 is connected to the side walls 12. The crossbeam 20 extends along the second direction Y.

[0048] In some embodiments, the crossbeam 20 is located within the cavity 100 and divides the cavity 100 into a first cavity 101 and a second cavity 102 distributed along a first direction X. The first cavity 101 is used to accommodate battery cells (not shown in the figure), and the second cavity 102 is used to accommodate electrical modules (not shown in the figure). Thus, the crossbeam 20 can separate the battery cells and electrical modules within the cavity 100 of the battery pack 1, preventing mutual interference between the battery cells and electrical modules during assembly and operation, and improving the safety of the battery pack.

[0049] In some embodiments, such as Figures 1 to 3 As shown, the crossbeam 20 includes a clearance section 21 and a reinforcing section 22 arranged along its length direction. The clearance section 21 has a height of H1 relative to the bottom 11, and the reinforcing section 22 has a height of H2 relative to the bottom 11, wherein H1 < H2.

[0050] The battery box 1 provided in this embodiment strengthens the box 10 by providing a crossbeam 20 inside the cavity 100 of the box 10 and connecting the crossbeam 20 to the box 10, thereby improving the overall strength of the battery box 1. Simultaneously, by having the crossbeam 20 divide the cavity 100 of the box 10 into a first cavity 101 and a second cavity 102 distributed along a first direction X, with the first cavity 101 used to accommodate battery cells and the second cavity 102 used to accommodate electrical modules, the battery cells and electrical modules within the cavity 100 of the battery box 1 are separated, which helps improve the safety of the battery pack.

[0051] Based on this, the crossbeam 20 is further provided with a clearance section 21 and a reinforcing section 22 arranged along its length, and the height H1 of the clearance section 21 of the crossbeam 20 relative to the bottom 11 is less than the height H2 of the reinforcing section 22 relative to the bottom 11. In this way, the space occupied by the crossbeam 20 in the cavity 100 can be reduced, for example, the space occupied by the crossbeam 20 in the cavity 100 at the clearance section 21 can be reduced, so that wire harnesses, pipes, etc. connected between the first cavity 101 and the second cavity 102 can pass over the clearance section 21. That is, the clearance section 21 of the crossbeam 20 can avoid wire harnesses and pipes, thereby improving the space utilization rate of the cavity 100 of the housing 10.

[0052] Furthermore, the connection between the clearance section 21 and the reinforcing section 22 of the crossbeam 20 forms a bending structure, which helps to further improve the structural strength of the crossbeam 20. For example... Figure 3 As shown, the crossbeam 20 also includes a transition section 23 connecting the relief section 21 and the reinforcing section 22. The height of the transition section 23 relative to the bottom 11 gradually increases in the direction away from the relief section 21, creating a smooth transition, which makes the processing of the crossbeam 20 easier and provides higher strength. The crossbeam 20 can be a one-piece structure. For example, it can be formed by stamping sheet metal. No limitation is made here.

[0053] In some embodiments, the height H1 of the clearance section 21 relative to the bottom 11 can be ≥20mm, thereby giving the clearance section 21 sufficient strength to ensure that the battery box 1 has greater overall strength. The height H1 of the clearance section 21 relative to the bottom 11 can be 21mm, 25mm, 26mm, 30mm, etc., and is not limited here.

[0054] In some embodiments, such as Figures 1 to 3 As shown, the crossbeam 20 may include two reinforcing sections 22, which are located at both ends of the clearance section 21 along its length, thereby maximizing the structural strength of the crossbeam 20. The lengths of the two reinforcing sections 22 may be the same or different, depending on the structure of the battery box 1.

[0055] like Figure 3 As shown, the length of the crossbeam 20 is L1, and the length of the clearance section 21 is L2. In some embodiments, L2 / L1 can be ≤ 0.8. This avoids the crossbeam 20 from becoming too long and thus reducing its strength. The ratio of L2 to L1 can be 0.7, 0.6, 0.5, etc., and is not limited here.

[0056] In some embodiments, such as Figure 2 and Figure 4 As shown, the crossbeam 20 includes a first body 200 and first flanges 201 located on both sides of the first body 200 along the first direction X. The first flanges 201 are used to connect with the bottom 11, thereby making the connection between the crossbeam 20 and the bottom 11 more stable and convenient. The first flanges 201 can be attached to and welded to the bottom 11 to improve the connection strength between the first flanges 201 and the bottom 11.

[0057] The width of the first body 200 in the first direction X is W, which can be 25mm≤W≤35mm, so that the crossbeam 20 has strong strength while the crossbeam 20 does not occupy too much space in the cavity 100 of the box 10 and affect the space utilization of the box 10.

[0058] like Figure 4 As shown, the width of the clearance section 21 in the first direction X is W1, and the width of the reinforcing section 22 in the first direction X is W2. In some embodiments, W1 can be greater than W2. In this way, the structural strength of the clearance section 21 can be improved to a certain extent, and the impact of the reduction in the height H1 of the clearance section 21 relative to the bottom 11 on the strength of the crossbeam 20 can be reduced.

[0059] Specifically, W2 / W1 can be ≤ 1.2 to maximize the strength of the clearance section 21 while avoiding an excessively large width W1 that would occupy too much space. The ratio of W2 to W1 can be 1.05, 1.1, 1.15, etc., depending on the structure of the battery box 1.

[0060] like Figure 4 As shown, the width of the first flange 201 of the crossbeam 20 in the first direction X is W3, wherein W3 can be ≥ 20mm, so as to facilitate welding the first flange 201 to the bottom 11 and to give the first flange 201 high strength. The width W3 of the first flange 201 in the first direction X can be 22mm, 23mm, 25mm, etc., and can be determined according to factors such as the thickness and length of the first flange 201.

[0061] In some embodiments, the crossbeam 20 can be welded to the housing 10 to improve the connection strength and stability between the crossbeam 20 and the housing 10, thereby further improving the overall strength of the battery box 1. Specifically, the crossbeam 20 can be welded to the bottom 11 of the housing 10 to improve the structural strength of the bottom 11. A portion of the first flange 201 can be attached to and welded to the bottom 11, thus making the weld between the crossbeam 20 and the bottom 11 more stable.

[0062] Alternatively, the crossbeam 20 can be welded to the side wall 12 of the box body 10 to improve the structural strength of the side wall 12. Specifically, a portion of the first flange 201 can be attached to and welded to the side wall 12 to make the weld between the crossbeam 20 and the side wall 12 more stable.

[0063] like Figure 2 and Figure 6 As shown, the height of the side wall 12 relative to the bottom 11 is H3, where H2 / H3 ≥ 0.5. In this way, the height of the reinforcing section 22 of the crossbeam 20 can be increased as much as possible, making the reinforcing section 22 stronger and improving the reinforcing effect of the crossbeam 20 on the box body 10.

[0064] Additionally, H2 / H3 can be ≤1 to avoid the reinforcing section 22 being too high relative to the bottom 11, which would affect the installation of other components inside the housing 10. The ratio of H2 to H3 can be 0.6, 0.7, 0.8, etc., depending on the structure of each component of the battery box 1.

[0065] In some embodiments, such as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the battery box 1 may also include at least one side beam 30, which is connected to the bottom 11 and the side wall 12. The side beam 30, the bottom 11, and the side wall 12 enclose a space 300 extending along the first direction X. Thus, the side beam 30, the bottom 11, and the side wall 12 are connected to form a three-dimensional structure with higher strength and stronger resistance to deformation.

[0066] The side beam 30 can include a first reinforcing plate 31 and a second reinforcing plate 32 connected at an angle. The space 300 is located between the first reinforcing plate 31 and the corresponding side wall 12, and also between the second reinforcing plate 32 and the bottom 11. Thus, the first reinforcing plate 31, the second reinforcing plate 32, the bottom 11, and the side wall 12 can be combined to form an approximately square column structure, which has higher strength and helps to improve the overall strength of the battery box 1.

[0067] It should be noted that the included angle formed by the first reinforcing plate 31 and the second reinforcing plate 32 can be an obtuse angle, a right angle, or an acute angle. Specifically, for example... Figure 7 As shown, the included angle α formed between the first reinforcing plate 31 and the second reinforcing plate 32 can be greater than or equal to 80° and less than or equal to 87°, for example, it can be 82°, 85°, 86°, etc., so that the first reinforcing plate 31 and the second reinforcing plate 32 form a certain draft angle, making the processing of the side beam 30 more convenient.

[0068] In some embodiments, such as Figure 6 and Figure 7 As shown, the side beam 30 also includes a second flange 33 connected to the corresponding side wall 12. The second flange 33 includes connecting segments 331 and spacer segments 332 alternately distributed along the length direction of the side beam 30. The connecting segments 331 are connected to the corresponding side wall 12, and the spacer segments 332 are spaced apart from the corresponding side wall 12. Thus, the spacer segments 332 and connecting segments 331 of the second flange 33 are relatively bent, which helps to improve the strength of the side beam 30, thereby improving the overall strength of the battery box 1.

[0069] The second flange 33 can be welded to the corresponding side wall 12 to further improve the connection strength between the second flange 33 and the corresponding side wall 12.

[0070] In some embodiments, the width W4 of the second flange 33 in the height direction Z of the battery box 1 can be greater than or equal to 20 mm, so as to facilitate welding the second flange 33 to the side wall 12 and to give the second flange 33 higher strength. The width of the second flange 33 in the height direction Z can be 22 mm, 23 mm, 25 mm, etc., and can be determined according to factors such as the thickness and length of the second flange 33.

[0071] In some embodiments, the ratio of the total length of the plurality of spacer segments 332 of the side beam 30 in the length direction of the side beam 30 to the length of the side beam 30 is less than or equal to 0.5 and greater than or equal to 0.2, so as to effectively improve the structural strength of the connection between the side beam 30 and the side wall 12 and bottom 11 of the box body 10. The ratio of the total length of the plurality of spacer segments 332 of the side beam 30 in the length direction of the side beam 30 to the length of the side beam 30 can be 0.25, 0.3, 0.35, 0.4, etc.

[0072] Specifically, the second flange 33 is connected to the end of the second reinforcing plate 32 away from the first reinforcing plate 31. The side beam 30 is an integral structure. The side beam 30 can be formed by stamping a thin plate. Adjacent connecting sections 331 and spacer sections 332 are connected to each other. The connecting section 331 is attached to and welded to the corresponding side wall 12.

[0073] In some embodiments, such as Figure 7 As shown, at least one reinforcing portion 34 can be recessed at the connection between the first reinforcing plate 31 and the second reinforcing plate 32, which can improve the structural strength of the connection between the first reinforcing plate 31 and the second reinforcing plate 32. In some embodiments, the inner surface of the reinforcing portion 34 can be a smooth surface. In some embodiments, such as... Figure 7 As shown, the inner surface of the reinforcing part 34 can also be formed by splicing together multiple surfaces with polygonal shapes, which is not limited here.

[0074] Multiple reinforcing portions 34 can be recessed at the connection between the first reinforcing plate 31 and the second reinforcing plate 32, and the multiple reinforcing portions 34 are spaced apart along the length direction of the side beam 30, thereby further improving the strength of the side beam 30.

[0075] In some embodiments, such as Figure 6 and Figure 7 As shown, the side beam 30 also includes a third flange 35, which is connected to the bottom 11 to make the connection between the side beam 30 and the bottom 11 more convenient and stable. Specifically, the third flange 35 is connected to the end of the first reinforcing plate 31 away from the second reinforcing plate 32. The third flange 35 is attached to and welded to the bottom 11 to improve the connection strength between the side beam 30 and the bottom 11.

[0076] Specifically, the width W5 of the third flange 35 in the extension direction of the crossbeam 20 can be greater than or equal to 20mm, so as to facilitate welding the third flange 35 to the bottom 11 and give the third flange 35 high strength. The width of the third flange 35 in the extension direction of the crossbeam 20 can be 22mm, 23mm, 25mm, etc., which can be determined according to factors such as the thickness and length of the third flange 35.

[0077] In some embodiments, side beams 30 may be provided on the side walls 12 on both sides of the housing 10 along the second direction Y, wherein the crossbeams 20 extend along the second direction Y. This further improves the strength of the housing 10 on both sides along the second direction Y, resulting in higher overall strength of the housing 10.

[0078] In some embodiments, the side beam 30 can be connected to the crossbeam 20. As a result, when the battery box 1 is subjected to external forces, the side beam 30 and the crossbeam 20 can transmit forces better, making the overall strength of the battery box 1 higher.

[0079] Specifically, the reinforcing section 22 of the crossbeam 20 can be connected to the edge beam 30 to further improve the connection strength between the crossbeam 20 and the edge beam 30. Specifically, a portion of the edge beam 30 covers the crossbeam 20. The overlapping portions of the edge beam 30 and the crossbeam 20 are welded together to improve the connection strength. The two reinforcing sections 22 of the crossbeam 20 overlap and are welded to the two corresponding portions of the edge beams 30. Alternatively, a portion of the crossbeam 20 can cover the edge beam 30; this is not limited to this configuration.

[0080] like Figure 1 , Figure 2 As shown, the battery box 1 also includes a mounting plate 40 disposed in the first cavity 101, and the mounting plate 40 is connected to the bottom 11. The mounting plate 40 is used to support the cells of the battery module. By connecting the mounting plate 40 to the bottom 11, the strength of the battery box 1 can be further improved.

[0081] A support beam 41 protrudes from one side of the bottom 11 of the mounting plate 40, extending along the length of the side beam 30. The support beam 41 improves the overall strength of the mounting plate 40, enabling it to provide more stable support for the battery cell.

[0082] In some embodiments, the mounting plate 40 is connected to the crossbeam 20 to further improve the strength of the battery box 1. The mounting plate 40 can be welded to the crossbeam 20. A portion of the mounting plate 40 overlaps with the crossbeam 20 to facilitate and stabilize the welding process. Specifically, the end of the mounting plate 40 near the crossbeam 20 covers the first flange 201 of the crossbeam 20 near the first cavity 101, and the portion of the mounting plate 40 covering the first flange 201 is welded to the first flange 201. Alternatively, the first flange 201 may cover the end of the mounting plate 40 near the crossbeam 20; this is not limited to this embodiment.

[0083] In some embodiments, the mounting plate 40 is connected to the side beam 30 to further improve the strength of the battery box 1. The mounting plate 40 may be welded to the side beam 30. A portion of the mounting plate 40 overlaps with the side beam 30 to facilitate and stabilize the welding of the mounting plate 40 to the side beam 30. Specifically, the end of the mounting plate 40 near the side beam 30 covers the third flange 35 of the side beam 30, and the portion of the mounting plate 40 covering the third flange 35 is welded to the third flange 35. Alternatively, the third flange 35 may cover only the end of the mounting plate 40 near the side beam 30; this is not limited to this embodiment.

[0084] In some embodiments, such as Figure 1 , Figure 6 As shown, at least one support member 50 can be provided between the support beam 41 and the side beam 30. Thus, when the side beam 30 is deformed by compression on the side away from the support beam 41, the support beam 41 can support the side beam 30 through the support member 50 to suppress the deformation of the side beam 30, thereby improving the strength of the battery box 1.

[0085] One end of the support member 50 can be connected to the side beam 30, and the other end of the support member 50 can be connected to the support beam 41. That is, the support beam 41 is connected to the side beam 30 through the support member 50, thereby further improving the structural strength of the support beam 41 and the side beam 30.

[0086] In other embodiments, one end of the support member 50 may be connected to the side beam 30, and the other end of the support member 50 may be spaced apart from the support beam 41. Alternatively, one end of the support member 50 may be spaced apart from the side beam 30, and the other end of the support member 50 may be connected to the support beam 41. As long as the side beam 30 deforms toward the support beam 41, the support beam 41 and the side beam 30 may be connected to the support member 50 respectively, so that the support beam 41 supports the side beam 30 through the support member 50. No limitation is made here.

[0087] Specifically, the mounting plate 40 includes two support beams 41. The two support beams 41 extend along a first direction X. The two support beams 41 are arranged opposite each other along the length of the crossbeam 20 in the edge region of the mounting plate 40. The battery box 1 includes two side beams 30. The two side beams 30 extend along a first direction X. The two side beams 30 are arranged opposite each other along the length of the crossbeam 20. The two support beams 41 are located between the two side beams 30. At least one support member 50 is provided between the support beam 41 and the side beam 30 on the same side.

[0088] One end of the support member 50 is welded to the side beam 30. The other end of the support member 50 is welded to the support beam 41. Figure 8 As shown, the support member 50 can be a U-shaped plate structure. The support member 50 can be formed by stamping thin plates. The support member 50 can also be other shapes, which are not limited here.

[0089] like Figure 5 and Figure 6 As shown, the side beam 30 may include a second body 36 that encloses a space 300 with the bottom 11 and the side wall 12. The height of the second body 36 relative to the bottom 11 is G1, and the height of the end of the support member 50 near the side beam 30 relative to the bottom 11 is G2. In some embodiments, 0 ≤ G1 - G2 ≤ ​​10 mm can be made. This avoids the problem of the support member 50 extending beyond the surface of the second body 36 of the side beam 30 away from the bottom 11, thus preventing interference to the battery cell. Simultaneously, it also maximizes the height of the end of the support member 50 near the side beam 30, thereby maximizing the strength of the support member 50.

[0090] Specifically, the second body 36 includes a first reinforcing plate 31 and a second reinforcing plate 32. The height of the second reinforcing plate 32 relative to the bottom 11 is G1. The end of the support member 50 near the side beam 30 is welded to the first reinforcing plate 31.

[0091] Similarly, the height of the support beam 41 relative to the bottom 11 is G3, and the height of the end of the support member 50 near the support beam 41 relative to the bottom 11 is G4. This ensures that 0 ≤ G3 - G4 ≤ 10 mm, thereby preventing the support member 50 from extending beyond the side surface of the support beam 41 body away from the bottom 11 and causing interference to the battery cell. Simultaneously, it also maximizes the height of the end of the support member 50 near the support beam 41, thereby maximizing the strength of the support member 50.

[0092] In some embodiments, such as Figure 1 and Figure 2 As shown, multiple support members 50 can be provided between the side beam 30 and the corresponding support beam 41, with the multiple support members 50 spaced apart along the length direction of the side beam 30. This further enhances the support strength of the support beam 41 on the side beam 30.

[0093] The spacing P between two adjacent support members 50 can be 100mm ≤ P ≤ 400mm. This ensures that the support beam 41 stably supports the side beam 30 through the support members 50, while avoiding an excessive number of support members 50 that would affect the weight and processing cost of the battery box 1. The spacing P between two adjacent support members 50 can be 100mm-200mm, 200mm-300mm, etc. Specifically, the spacing between two adjacent support members 50 can be 110mm, 140mm, 160mm, 200mm, 250mm, 300mm, 360mm, etc.

[0094] In some embodiments, such as Figure 1 and Figure 2 As shown, the battery box 1 may further include a rear beam 60, which is located within the first cavity 101 and connected to a side wall 12 located on the side of the first cavity 101 away from the crossbeam 20, to improve the strength of the battery box 1. The rear beam 60 is attached to and welded to the corresponding side wall 12 to improve the connection strength between the rear beam 60 and the corresponding side wall 12.

[0095] Continue to refer to Figure 1 and Figure 2 The rear beam 60 is connected to the mounting plate 40 to further enhance the reinforcing effect of the rear beam 60 on the battery box 1. The rear beam 60 covers a portion of the mounting plate 40, and the overlapping portions of the rear beam 60 and the mounting plate 40 are welded together. Alternatively, the mounting plate 40 may cover a portion of the rear beam 60; this is not limited to this arrangement.

[0096] In some embodiments, the battery box 1 may further include a cover (not shown in the figure), which is connected to the box body 10 to cover the cavity 100 of the box body 10, so that the cavity 100 is in a sealed state.

[0097] This application also provides a battery pack, which includes a battery box. The specific structure of the battery box is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0098] The battery pack may include a battery box 1 and battery modules. Each battery module comprises multiple battery cells and is located within the first cavity 101 of the battery box 1. The battery pack may also include an electrical module located within the second cavity 102 of the battery box 1. The electrical module may be a BDU (Battery Disconnect Unit) or other circuit structure; no limitation is made here.

[0099] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery box, characterized in that, include: The housing includes a bottom and side walls, wherein the bottom and the side walls enclose a cavity; A crossbeam is connected to the housing. The crossbeam is located inside the cavity and divides the cavity into a first cavity and a second cavity distributed along a first direction. The first cavity is used to accommodate the battery cell, and the second cavity is used to accommodate the electrical module. The crossbeam includes a clearance section and a reinforcing section arranged along its length. The clearance section is at a height of H1 relative to the bottom, and the reinforcing section is at a height of H2 relative to the bottom, wherein H1 < H2.

2. The battery box as described in claim 1, characterized in that, The height of the sidewall relative to the bottom is H3, where 0.5 ≤ H2 / H3 ≤ 1.

3. The battery box as described in claim 1, characterized in that, The crossbeam includes two reinforcing sections, which are located at both ends of the clearance section along its length.

4. The battery box as described in claim 1, characterized in that, The height H1 of the avoidance section relative to the bottom is ≥20mm.

5. The battery box as described in claim 1, characterized in that, The length of the crossbeam is L1, and the length of the clearance section is L2, wherein L2 / L1≤0.

8.

6. The battery box as described in claim 1, characterized in that, The crossbeam includes a first body and first flanges located on both sides of the first body along the first direction, the first flanges being for connection to the bottom. The width of the first body in the first direction is W, where 25mm ≤ W ≤ 35mm; and / or, The width of the avoidance section in the first direction is W1, and the width of the reinforcement section in the first direction is W2, wherein W1 > W2.

7. The battery box as described in claim 1, characterized in that, The crossbeam includes a first body and first flanges located on both sides of the first body along the first direction. The first flanges are used to connect with the bottom. The width of the first flanges in the first direction is W3, where W3 ≥ 20 mm.

8. The battery box as described in any one of claims 1 to 7, characterized in that, The battery box also includes at least one side beam, which is connected to the bottom and the side wall, and the side beam, the bottom and the side wall enclose a space extending along the first direction.

9. The battery box as described in claim 8, characterized in that, The side beam includes a first reinforcing plate and a second reinforcing plate connected at an angle. The space is located between the first reinforcing plate and the corresponding side wall, and the space is also located between the second reinforcing plate and the bottom.

10. The battery box as described in claim 9, characterized in that, The connection between the first reinforcing plate and the second reinforcing plate is recessed to form multiple reinforcing portions, which are spaced apart along the length of the side beam.

11. The battery box as claimed in claim 8, characterized in that, The side beam also includes a second flange connected to the corresponding side wall. The second flange includes connecting segments and spacer segments that are alternately distributed along the length direction of the side beam. The connecting segments are connected to the corresponding side wall, and the spacer segments are spaced apart from the corresponding side wall.

12. The battery box as described in claim 8, characterized in that, The box body is provided with side beams on both sides of the second direction, and the crossbeams extend along the second direction.

13. The battery box as described in claim 8, characterized in that, The side beam is connected to the cross beam.

14. The battery box as claimed in claim 8, characterized in that, The battery box also includes a mounting plate disposed in the first cavity. The mounting plate is connected to the bottom. A support beam protrudes from the side of the mounting plate opposite to the bottom. The support beam extends along the length direction of the side beam. At least one support member is provided between the support beam and the side beam.

15. The battery box as described in claim 14, characterized in that, One end of the support member is connected to the side beam, and the other end of the support member is connected to the support beam.

16. The battery box as claimed in claim 14, characterized in that, The side beam includes a second body that encloses the space formed by the bottom and the side wall, the second body having a height of G1 relative to the bottom, and the support member having a height of G2 relative to the bottom at the end near the side beam, wherein 0 ≤ G1 - G2 ≤ ​​10 mm; and / or, The height of the support beam relative to the bottom is G3, and the height of the end of the support member near the support beam relative to the bottom is G4, wherein 0≤G3-G4≤10mm.

17. The battery box as claimed in claim 14, characterized in that, Multiple support members are provided between the side beam and the corresponding support beam. The multiple support members are spaced apart along the length direction of the side beam, and the distance between two adjacent support members is P, where 100mm≤P≤400mm.

18. A battery pack, characterized in that, Includes the battery box as described in any one of claims 1 to 17.

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