Cross beam, battery box, battery and vehicle

Abstract

The utility model relates to a crossbeam, battery box, battery and vehicle, said crossbeam comprises a first main body and a second main body, said first main body is provided the lower side of said second main body, the structural strength of said first main body is greater than the structural strength of said second main body. The cross beam is reasonable in structural design, when the bottom of a vehicle is scraped, the probability that the battery box is damaged can be effectively reduced, and the safety of the vehicle can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a crossbeam, a battery box, a battery, and a vehicle. Background Technology

[0002] The power battery is one of the core components of an electric vehicle. The battery box provides installation space for other components within the power battery and reduces the impact of the electric vehicle's environment on these components. It also protects other parts in the event of a collision or other safety incident. However, in some related technologies, an unreasonable structural design of the battery box can easily lead to damage during a collision, affecting internal battery cells and other components, thus jeopardizing the safety of the entire vehicle and posing a high risk. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a crossbeam with a reasonable structural design. When the vehicle scrapes its bottom, the crossbeam can effectively reduce the probability of damage to the battery box, which is beneficial to improving vehicle safety.

[0005] An embodiment of this utility model also proposes a battery box.

[0006] An embodiment of this utility model also proposes a battery.

[0007] An embodiment of this utility model also proposes a vehicle.

[0008] The crossbeam of this utility model includes a first body and a second body, the first body is disposed on the lower side of the second body, and the structural strength of the first body is greater than that of the second body.

[0009] According to the embodiment of this utility model, when a vehicle scrapes its bottom, the obstacle mainly contacts the first main body of the crossbeam. Since the structural strength of the first main body is greater than that of the second main body, the impact resistance of the lower area of ​​the crossbeam can be improved, reducing the degree of deformation caused by the vehicle scraping its bottom. Therefore, the crossbeam structure of this utility model embodiment is reasonably designed, effectively reducing the probability of battery box damage, protecting the battery cells and other components inside the battery box, and improving vehicle safety.

[0010] In some embodiments, the crossbeam further includes a third body disposed between the first body and the second body, and the structural strength of the third body is not less than the structural strength of the second body.

[0011] In some embodiments, the first body includes a first beam segment and a first reinforcement bar, the first reinforcement bar being disposed on the first beam segment; the second body includes a second beam segment and a second reinforcement bar, the second reinforcement bar being disposed on the second beam segment; and the structural strength of the first reinforcement bar is greater than the structural strength of the second reinforcement bar.

[0012] In some embodiments, at least a portion of the first rib is vertically connected to at least a portion of the second rib and extends in the same direction.

[0013] In some embodiments, the number of first reinforcing bars arranged on the first beam segment is greater than the number of second reinforcing bars arranged on the second beam segment; and / or, the size of the first reinforcing bar is greater than the size of the second reinforcing bar.

[0014] In some embodiments, the first ribs are staggered on the first beam segment and together with the first beam segment form a plurality of first chambers, and the second ribs are staggered on the second beam segment and together with the second beam segment form a plurality of second chambers, wherein the arrangement density of the first chambers is greater than the arrangement density of the second chambers.

[0015] In some embodiments, the volume of the first chamber is smaller than the volume of the second chamber.

[0016] In some embodiments, the total number of layers of the first chamber and the second chamber arranged along the vertical direction of the crossbeam is N, where 2≤N≤4; and / or, the dimension of the first chamber along the horizontal direction of the crossbeam is D, where 100mm≤D≤300mm; and / or, the dimension of the first chamber along the horizontal direction of the crossbeam is D, and the dimension of the second chamber along the horizontal direction of the crossbeam is d, where 0.3≤d / D≤0.6.

[0017] In some embodiments, the first body includes a first beam segment and a first reinforcing bar, the first reinforcing bar being disposed on the first beam segment; the second body includes a second beam segment and a second reinforcing bar, the second reinforcing bar being disposed on the second beam segment; and the thickness of the first beam segment is greater than the thickness of the second beam segment.

[0018] In some embodiments, the thickness of the first beam segment gradually increases from top to bottom.

[0019] In some embodiments, the maximum thickness of the first beam segment is S1, and the thickness of the second beam segment is S2, wherein 3mm≤S2≤5mm, and 1≤S1 / S2≤2.

[0020] In some embodiments, the first body includes a first beam segment and a flange, the flange being disposed at the lower edge of the first beam segment, the flange being connected to the first beam segment by a first rounded corner, and the end of the flange facing away from the first beam segment having a second rounded corner, and the second rounded corner being disposed on the lower side of the flange.

[0021] In some embodiments, the crossbeam is a die-cast part.

[0022] In some embodiments, the upper end face of the crossbeam is provided with a sealing glue groove, a mounting hole and a glue storage groove, and at least part of the glue storage groove is provided between the mounting hole and the sealing glue groove.

[0023] In some embodiments, the glue reservoir is arranged close to and spaced apart from the mounting hole, and the glue reservoir extends circumferentially along the mounting hole.

[0024] Another embodiment of the battery box of the present invention includes a frame, the frame having a front crossbeam and a rear crossbeam, the front crossbeam and the rear crossbeam being arranged along the front-rear direction of the frame, and at least one of the front crossbeam and the rear crossbeam being the crossbeam described in the embodiment of the present invention.

[0025] Another embodiment of the battery of this utility model includes a battery cell and a battery box, wherein the battery box is the battery box described in the embodiment of this utility model, and the battery cell is disposed inside the battery box.

[0026] Another embodiment of the vehicle of the present invention includes the battery described in the embodiment of the present invention.

[0027] According to an embodiment of the present invention, when the vehicle scrapes its bottom, the obstacle mainly contacts the first main body of the crossbeam. Since the structural strength of the first main body is greater than that of the second main body, the impact resistance of the lower area of ​​the crossbeam can be improved, the degree of deformation of the crossbeam caused by the vehicle scraping its bottom can be reduced, thereby reducing the probability of damage to the battery box, thus protecting the battery cells and other components inside the battery box and improving the safety of the vehicle. Attached Figure Description

[0028] Figure 1 This is a perspective view of the battery box according to an embodiment of the present invention.

[0029] Figure 2 This is an exploded view of the battery box according to an embodiment of the present invention.

[0030] Figure 3 This is a front view of the crossbeam of the battery box according to an embodiment of the present invention.

[0031] Figure 4 This is a partial cross-sectional view of the crossbeam of the battery box according to an embodiment of the present invention.

[0032] Figure 5 This is a perspective view of the crossbeam of the battery box according to an embodiment of the present invention.

[0033] Figure 6 This is a partial schematic diagram of the crossbeam of the battery box according to an embodiment of the present invention.

[0034] Figure label:

[0035] 10. Frame; 20. Base plate;

[0036] 1. Crossbeam; 101. Front crossbeam; 102. Rear crossbeam;

[0037] 11. First main body; 111. First beam segment; 112. First reinforcing bar; 1121. First transverse reinforcing bar; 1122. First longitudinal reinforcing bar; 1123. First cavity; 113. Flanged edge; 1131. First rounded corner; 1132. Second rounded corner;

[0038] 12. The second body; 121. The second beam section; 122. The second rib; 1221. The second transverse rib; 1222. The second longitudinal rib; 1223. The second chamber;

[0039] 13. Sealing groove;

[0040] 14. Mounting hole;

[0041] 15. Glue storage tank;

[0042] 2. Edge beams. Detailed Implementation

[0043] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] The following is a reference appendix. Figures 1 to 6 This invention describes a crossbeam, a battery box, a battery, and a vehicle according to embodiments of the present invention.

[0045] like Figures 3 to 6 As shown, the battery box of this utility model embodiment includes a first body 11 and a second body 12. The first body 11 is disposed on the lower side of the second body 12, and the structural strength of the first body 11 is greater than that of the second body 12.

[0046] According to the embodiment of the present invention, when the vehicle scrapes its bottom, the obstacle mainly contacts the first main body 11 of the crossbeam 1. Since the structural strength of the first main body 11 is greater than that of the second main body 12, the impact resistance of the lower area of ​​the crossbeam 1 can be improved, reducing the degree of deformation of the crossbeam 1 caused by the vehicle scraping its bottom. Therefore, the crossbeam 1 of the embodiment of the present invention has a reasonable structural design, which can reduce the probability of damage to the battery box, protect the battery cells and other components inside the battery box, and improve vehicle safety.

[0047] It is understandable that the vertical direction of the crossbeam 1 is consistent with the vertical direction of the vehicle, the front-back direction of the crossbeam 1 is consistent with the front-back direction of the vehicle, and the length direction (left-right direction) of the crossbeam 1 is consistent with the left-right direction of the vehicle.

[0048] For example, the structural strength of the first body 11 being greater than the structural strength of the second body 12 can be achieved through at least the following:

[0049] (1) The thickness of the first body 11 is greater than the thickness of the second body 12, or the width of the first body 11 is greater than the width of the second body 12, or the length of the first body 11 is greater than the length of the second body 12.

[0050] (2) The number of reinforcing ribs inside or on the surface of the first body 11 is greater (more dense) than the number of reinforcing ribs inside or on the surface of the second body 12.

[0051] (3) The size of the reinforcing ribs inside or on the surface of the first body 11 is larger than the size of the reinforcing ribs inside or on the surface of the second body 12.

[0052] (4) The material of the first body 11 has higher buckling strength, tensile strength and compressive strength than the material of the second body 12.

[0053] Optionally, the crossbeam 1 further includes a third body (not shown), which is located between the first body 11 and the second body 12. The structural strength of the third body is not less than the structural strength of the second body 12. It is understood that the structural strength of the third body can be greater than or equal to the structural strength of the second body 12. This allows the structural strength of the crossbeam 1 to be arranged in a stepped manner along the vertical direction, thereby reducing the overall weight of the crossbeam 1 and facilitating lightweight vehicle design.

[0054] The third subject can be one or more, and this utility model does not limit this.

[0055] In some embodiments, such as Figure 3 and Figure 4As shown, the first main body 11 includes a first beam segment 111 and a first reinforcing bar 112, with the first reinforcing bar 112 located on the first beam segment 111. The second main body 12 includes a second beam segment 121 and a second reinforcing bar 122, with the second reinforcing bar 122 located on the second beam segment 121. The structural strength of the first reinforcing bar 112 is greater than that of the second reinforcing bar 122. It is understood that the first reinforcing bar 112 strengthens the structure of the first beam segment 111 and helps reduce the weight of the first main body 11, while the second reinforcing bar 122 strengthens the structure of the second beam segment 121 and helps reduce the weight of the second main body 12. Because the structural strength of the first reinforcing bar 112 is greater than that of the second reinforcing bar 122, the structural strength of the lower region of the beam 1 can be improved, thereby enhancing the beam 1's resistance to bottom scratches.

[0056] The first reinforcing bar 112 can be located inside the first beam segment 111 or on the outer wall of the first beam segment 111. The second reinforcing bar 122 can be located inside the second beam segment 121 or on the outer wall of the second beam segment 121.

[0057] In this example of the present invention, the first rib 112 is provided on the outer wall of the first beam segment 111, and the second rib 122 is provided on the outer wall of the second beam segment 121, so as to facilitate the die-casting of the crossbeam 1. It can be understood that the crossbeam 1 of this embodiment of the present invention is an integral die-cast part. Compared with the solution of "crossbeam 1 is an aluminum profile", it is easier to install connectors, water taps and other components on the crossbeam 1, thereby improving the flexibility and convenience of component arrangement, and the overall structural strength is higher.

[0058] For example, such as Figure 4 As shown, the first rib 112 and the second rib 122 are located on the same side of the crossbeam 1 along the front-back direction, which makes the structure of the crossbeam 1 regular and helps to reduce the overall width of the crossbeam 1 along the front-back direction.

[0059] Optionally, at least a portion of the first rib 112 is vertically connected to at least a portion of the second rib 122 and extends in the same direction. This can improve the overall structural strength of the crossbeam 1, thereby reducing the risk of the crossbeam 1 breaking at the junction of the first beam segment 111 and the second beam segment 121 during a vehicle collision.

[0060] like Figure 3 and Figure 4As shown, the first rib 112 includes a plurality of first longitudinal ribs 1122, which are arranged at intervals along the left and right directions of the first main body 11. The second rib 122 includes a plurality of second longitudinal ribs 1222, which are arranged at intervals along the left and right directions of the second main body 12. The plurality of first longitudinal ribs 1122 are connected one-to-one with the plurality of second longitudinal ribs 1222 in the vertical direction, and both the first longitudinal ribs 1122 and the second longitudinal ribs 1222 extend along the vertical direction of the crossbeam 1.

[0061] In one example, such as Figure 3 As shown, the number of first reinforcing bars 112 on the first beam segment 111 is greater than the number of second reinforcing bars 122 on the second beam segment 121. It can be understood that there are multiple first reinforcing bars 112 and multiple second reinforcing bars 122, with the number of first reinforcing bars 112 being greater than the number of second reinforcing bars 122. This improves the structural strength of the first main body 11 without excessively increasing the weight of the beam 1.

[0062] In another example, the first rib 112 is larger than the second rib 122. For example, the length of the first rib 112 is greater than the length of the second rib 122, or the width of the first rib 112 is greater than the width of the second rib 122, or the thickness of the first rib 112 is greater than the thickness of the second rib 122. This can further improve the structural strength of the first main body 11 without excessively increasing the weight of the crossbeam 1.

[0063] Optionally, such as Figure 3 and Figure 4 As shown, the first ribs 112 are staggered on the first beam segment 111, forming multiple first chambers 1123 with the first beam segment 111. The second ribs 122 are staggered on the second beam segment 121, forming multiple second chambers 1223 with the second beam segment 121. The arrangement density of the first chambers 1123 is greater than that of the second chambers 1223. Since the first body 11 and the second body 12 are respectively provided with the first chambers 1123 and the second chambers 1223, the overall structural strength of the crossbeam 1 can be improved while reducing its weight. Furthermore, since the arrangement density of the first chambers 1123 is greater than that of the second chambers 1223, the structural strength of the lower area of ​​the crossbeam 1 can be improved, thus enhancing the crossbeam 1's resistance to bottom scratches.

[0064] like Figure 3 As shown, the volume of the first chamber 1123 is smaller than that of the second chamber 1223, so as to further enhance the supporting effect of the first rib 112 on the first beam segment 111 and make the crossbeam 1 more resistant to deformation.

[0065] In the examples of this utility model, such as Figure 3 and Figure 4As shown, the first rib 112 includes a plurality of first longitudinal ribs 1122 and a plurality of first transverse ribs 1121, which are arranged alternately to form a plurality of first chambers 1123. The second rib 122 includes a plurality of second longitudinal ribs 1222 and a plurality of second transverse ribs 1221, which are arranged alternately to form a plurality of second chambers 1223.

[0066] Optionally, such as Figure 3 As shown, the total number of layers of the first chamber 1123 and the second chamber 1223 arranged along the vertical direction of the crossbeam 1 is N, where 2 ≤ N ≤ 4. For example, N can be 2, 3, or 4. When the number of layers of the first chamber 1123 and the second chamber 1223 arranged along the vertical direction meets the above range, it can ensure that the crossbeam 1 has sufficient structural strength, save materials, reduce production costs, and facilitate the lightweight design of the crossbeam 1.

[0067] Optionally, such as Figure 3 As shown, the dimension of the first chamber 1123 along the left-right direction of the crossbeam 1 is D, where 100mm ≤ D ≤ 300mm. For example, D can be 100mm, 120mm, 140mm, 160mm, 180mm, or 200mm. The dimension of the second chamber 1223 along the left-right direction of the crossbeam 1 is d, where 0.3 ≤ d / D ≤ 0.6. For example, d / D can be 0.3, 0.4, 0.5, or 0.6. When the dimensional parameters of the first chamber 1123 and the second chamber 1223 meet the above ranges, it ensures that the crossbeam 1 has sufficient structural strength, saves materials, reduces production costs, and facilitates the lightweight design of the crossbeam 1.

[0068] In one example, the height of beam 1 is H, and the length of beam 1 is W, where 100mm ≤ H ≤ 200mm and 1000mm ≤ W ≤ 2000mm. That is, the height of beam 1 can be selected between 100mm and 200mm, and the length of beam 1 can be selected between 1000mm and 2000mm.

[0069] Optionally, such as Figure 3 As shown, the vertical dimension of the first chamber 1123 is h, and the vertical dimension of the crossbeam 1 is H, where 0.25 ≤ h / H ≤ 0.5. For example, h / H can be 0.25, 0.3, 0.4, or 0.5. When the ratio of the vertical dimension of the first chamber 1123 and the crossbeam 1 meets the above range, it ensures that the crossbeam 1 has sufficient structural strength, saves materials, reduces production costs, and facilitates the lightweight design of the crossbeam 1.

[0070] Optionally, such as Figure 4As shown, the thickness of the first beam segment 111 is greater than the thickness of the second beam segment 121, and the thickness of the second beam segment 121 is designed to be thinner (e.g., Figure 4 (The position of the dashed box). This can further improve the structural strength of the lower area of ​​beam 1, thereby enhancing the anti-scraping performance of beam 1.

[0071] For example, such as Figure 4 As shown, the thickness of the first beam segment 111 gradually increases from top to bottom, which allows for targeted structural reinforcement of the lower part of the first beam segment 111, thus helping to reduce the overall weight of the crossbeam 1.

[0072] Optionally, the maximum thickness of the first beam segment 111 is S1, and the thickness of the second beam segment 121 is S2, wherein 3mm≤S2≤5mm, and 1≤S1 / S2≤2.

[0073] For example, S2 can be 3mm, 3.5mm, 4mm, 4.5mm, or 5mm. S1 / S2 can be 1, 1.2, 1.4, 1.6, 1.8, or 2. The inventors of this application discovered through experimental research that when the thicknesses of the first beam segment 111 and the second beam segment 121 are within the above parameter range, the risk of aluminum porosity during the production of the crossbeam 1 can be reduced, while ensuring the bottom of the crossbeam 1's anti-scraping ability, resulting in better performance.

[0074] Optionally, such as Figure 4 and Figure 6 As shown, the first main body 11 includes a first beam segment 111 and a flange 113. The flange 113 is located at the lower edge of the first beam segment 111 and is connected to the first beam segment 111 by a first fillet 1131. In other words, the connection position between the flange 113 and the first beam segment 111 is provided with a first fillet 1131 to improve the energy absorption effect of the flange 113 position of the crossbeam 1 during collision.

[0075] For example, such as Figure 4 As shown, the radius of the first fillet 1131 is R1, where 5mm ≤ R1 ≤ 10mm. For example, R1 can be 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. The inventors of this application discovered through experimental research that the larger the R1 angle, the better the energy absorption effect of the flange 113 position of the crossbeam 1 during collision. However, an excessively large R1 can also cause excessive local structural thickness, easily leading to die-casting defects. Therefore, selecting R1 between 5mm and 10mm ensures both the energy absorption effect of the crossbeam 1 during collision and reduces the probability of die-casting defects during the production of the crossbeam 1.

[0076] Optionally, such as Figure 4As shown, the end of the flange 113 facing away from the first beam segment 111 (i.e., the end of the flange 113) has a second rounded corner 1132, and the second rounded corner 1132 is located on the lower side of the flange 113. For example, R2 ≥ 3mm. When the crossbeam 1 scrapes the bottom, the second rounded corner 1132 can act as a guide to raise the battery box, thereby preventing the crossbeam 1 from directly hitting the obstacle and improving the safety of the entire vehicle.

[0077] In some embodiments, such as Figure 5 and Figure 6 As shown, the upper end face of the crossbeam 1 is provided with a sealing glue groove 13, a mounting hole 14 and a glue storage groove 15, with at least a portion of the glue storage groove 15 located between the mounting hole 14 and the sealing glue groove 13.

[0078] Understandably, when assembling the battery box, the sealing groove 13 is filled with sealant. When the sealant overflows, it can first enter the storage groove 15 to prevent it from entering the mounting hole 14, thus not affecting the subsequent assembly of the battery box. Moreover, it eliminates the need for manual cleaning of the overflowing sealant at the mounting hole 14, which helps to reduce production costs and improve production efficiency.

[0079] Optionally, such as Figure 5 and Figure 6 As shown, the sealant reservoir 15 is arranged near and spaced apart from the mounting hole 14, and extends circumferentially along the mounting hole 14. This further reduces the probability of sealant entering the mounting hole 14. For example, the extension path of the sealant reservoir 15 is n-shaped. Compared to a scheme where the extension path of the sealant reservoir 15 is a closed ring, the n-shaped sealant reservoir 15 does not weaken the structural strength of the mounting hole 14 area, which is beneficial to improving the reliability of the battery box after assembly.

[0080] like Figure 1 and Figure 2 As shown, another embodiment of the battery box of the present invention includes a frame 10, the frame 10 having a front crossbeam 101 and a rear crossbeam 102, the front crossbeam 101 and the rear crossbeam 102 being arranged along the front-rear direction of the frame 10, and at least one of the front crossbeam 101 and the rear crossbeam 102 being the crossbeam 1 of the present invention.

[0081] In the example of this utility model, the front crossbeam 101 and the rear crossbeam 102 are both crossbeams 1 of this utility model.

[0082] like Figure 1 As shown, the frame 10 also includes two side beams 2. The two side beams 2 are arranged between the front crossbeam 101 and the rear crossbeam 102 along the front-back direction, and the two side beams 2 are arranged at intervals along the left-right direction of the front crossbeam 101. The side beams 2, the front crossbeam 101 and the rear crossbeam 102 form a battery cell housing cavity. The front crossbeam 101 and the rear crossbeam 102 are die-cast parts, and the side beams 2 are aluminum profiles.

[0083] Optionally, an auxiliary support beam (not shown) is also provided inside the battery cell housing cavity. The auxiliary support beam can be arranged in the transverse or longitudinal direction, thereby further improving the structural strength of the battery box.

[0084] like Figure 1 and Figure 2 As shown, the battery box also includes a bottom plate 20 and a top plate (not shown). The bottom plate 20 is mounted on the lower side of the frame 10, and the top plate is mounted on the upper side of the frame 10.

[0085] Another embodiment of the battery of this utility model includes a battery cell and a battery case, wherein the battery case is the battery case of this utility model, and the battery cell is disposed inside the battery case. The technical advantages of the battery of this utility model embodiment are the same as the technical advantages of the battery case of the above embodiment, and will not be repeated here.

[0086] Another embodiment of the vehicle of this utility model includes the battery of this utility model. The technical advantages of the vehicle of this utility model embodiment are the same as the technical advantages of the battery of the above embodiment, and will not be repeated here.

[0087] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0088] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0090] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0091] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A cross member characterized by, The crossbeam (1) comprises a first body (11) and a second body (12), the first body (11) is arranged at the lower side of the second body (12), the structural strength of the first body (11) is greater than that of the second body (12).

2. Beam (1) according to claim 1, characterized in that The crossbeam (1) further comprises a third body, the third body is arranged between the first body (11) and the second body (12), the structural strength of the third body is not less than that of the second body (12).

3. Beam (1) according to claim 1, characterized in that The first body (11) comprises a first beam segment (111) and a first rib (112), the first rib (112) is arranged on the first beam segment (111), the second body (12) comprises a second beam segment (121) and a second rib (122), the second rib (122) is arranged on the second beam segment (121), the structural strength of the first rib (112) is greater than that of the second rib (122).

4. Beam (1) according to claim 3, characterized in that At least part of the first rib (112) is connected with at least part of the second rib (122) in the same direction.

5. Beam (1) according to claim 3, characterized in that The arrangement number of the first rib (112) on the first beam segment (111) is greater than that of the second rib (122) on the second beam segment (121). And / or, the size of the first rib (112) is greater than that of the second rib (122).

6. Beam (1) according to claim 3, characterized in that The first rib (112) is arranged on the first beam segment (111) in a staggered manner, and a plurality of first cavities (1123) are formed around the first beam segment (111), the second rib (122) is arranged on the second beam segment (121) in a staggered manner, and a plurality of second cavities (1223) are formed around the second beam segment (121), the arrangement density of the first cavities (1123) is greater than that of the second cavities (1223).

7. Beam (1) according to claim 6, characterized in that The volume of the first cavity (1123) is smaller than that of the second cavity (1223).

8. Beam (1) according to claim 6, characterized in that The total number of layers of the first cavity (1123) and the second cavity (1223) arranged in the up-down direction of the crossbeam (1) is N, wherein 2≤N≤4. And / or, the size of the first cavity (1123) in the left-right direction of the crossbeam (1) is D, wherein 100mm≤D≤300mm. And / or, the size of the first cavity (1123) in the left-right direction of the crossbeam (1) is D, and the size of the second cavity (1223) in the left-right direction of the crossbeam (1) is d, wherein 0.3≤d / D≤0.

6.

9. Beam (1) according to claim 1, characterized in that The first body (11) comprises a first beam segment (111) and a first rib (112), the first rib (112) is arranged on the first beam segment (111), the second body (12) comprises a second beam segment (121) and a second rib (122), the second rib (122) is arranged on the second beam segment (121), the thickness of the first beam segment (111) is greater than that of the second beam segment (121).

10. Beam (1) according to claim 9, characterized in that The thickness of the first beam segment (111) gradually increases in the direction from top to bottom.

11. Beam (1) according to claim 10, characterized in that The maximum thickness of the first beam segment (111) is S1, and the thickness of the second beam segment (121) is S2, wherein 3mm≤S2≤5mm, and 1≤S1 / S2≤2.

12. Beam (1) according to claim 1, characterized in that The first main body (11) comprises a first beam segment (111) and a flange (113), the flange (113) is arranged at the lower edge of the first beam segment (111), the flange (113) is connected with the first beam segment (111) through a first round corner (1131), the end of the flange (113) away from the first beam segment (111) has a second round corner (1132), and the second round corner (1132) is arranged at the lower side of the flange (113).

13. Beam (1) according to claim 1, characterized in that The cross beam (1) is a die casting.

14. Beam (1) according to any one of claims 1-13, characterized in that The upper end surface of the cross beam (1) is provided with a sealing glue groove (13), a hanging hole (14) and a glue storage groove (15), and at least part of the glue storage groove (15) is arranged between the hanging hole (14) and the sealing glue groove (13).

15. Beam (1) according to claim 14, characterized in that The glue storage groove (15) is arranged close to the hanging hole (14) and is spaced apart from the hanging hole (14), and the glue storage groove (15) extends along the circumference of the hanging hole (14).

16. A battery pack, characterized by The battery box comprises a frame (10), the frame (10) has a front cross beam (101) and a rear cross beam (102), the front cross beam (101) and the rear cross beam (102) are arranged in the front-rear direction of the frame (10), and at least one of the front cross beam (101) and the rear cross beam (102) is the cross beam (1) of any one of claims 1-15.

17. A battery, characterized by It comprises: a battery monomer; a battery box, the battery box is the battery box of claim 16, and the battery monomer is arranged in the battery box.

18. A vehicle characterized by comprising: It comprises the battery of claim 17. It comprises the battery of claim 17.

Images