Composite cross beam and battery pack box body thereof

Abstract

The utility model discloses a composite crossbeam, include: stamping base and support body, the support body is through rivet installation in the top of stamping base, the bottom of stamping base forms stamping space, and the stamping space has a plurality of reinforcing blocks along the length direction distribution of stamping base, and every reinforcing block is connected between the rivet and stamping base.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and in particular to a composite beam and its battery pack housing. Background Technology

[0002] In the field of new energy vehicles, the performance of the battery pack enclosure is directly related to the safety and reliability of the vehicle.

[0003] Currently, the design and manufacturing of battery pack housing crossbeams face many challenges.

[0004] On the one hand, while using extruded aluminum profiles as the crossbeam material can meet some structural requirements to a certain extent, the aluminum profiles themselves have limited strength. When the battery pack is subjected to Y-axis compression, the crossbeam is prone to collapse, which in turn causes stress on the cells inside the battery pack, leading to serious safety problems such as short circuits, greatly threatening the safety of the vehicle and its occupants.

[0005] On the other hand, if sheet metal deep drawing process is used to manufacture crossbeams, although it can meet certain structural shape requirements, this process has obvious defects. When the drawing depth is too large, it is very easy to cause process defects such as cracking, which seriously affects product quality and production efficiency. Utility Model Content

[0006] In view of the above-mentioned problems of existing crossbeams, the aim is to provide a composite crossbeam and its battery pack housing.

[0007] The specific technical solution is as follows: A composite beam includes a stamping base and a support body. The support body is installed on the top of the stamping base by rivets. A stamping space is formed at the bottom of the stamping base. A plurality of reinforcing blocks are distributed in the stamping space along the length of the stamping base. Each reinforcing block is connected to the stamping base by rivets.

[0008] As a further improvement and optimization of this solution, both the stamping base and the support body are steel structures; the reinforcing block is an aluminum block.

[0009] As a further improvement and optimization of this solution, the stamping base includes: a first mounting part and a second mounting part, both of which are horizontally arranged. The first mounting part is higher than the second mounting part. The support body is installed on the upper side of the first mounting part by rivets, and the plurality of reinforcing blocks are respectively installed on the lower side of the second mounting part by rivets.

[0010] As a further improvement and optimization of this solution, the width of the first mounting part is greater than the width of the second mounting part; The width of the first mounting part is not greater than the width of the support body, and the sum of the widths of the first mounting part and the second mounting part is greater than the width of the reinforcing block.

[0011] As a further improvement and optimization of this solution, the stamping base further includes: a first reinforcing part, a second reinforcing part, and a third reinforcing part, wherein the first reinforcing part, the first mounting part, the second reinforcing part, the second mounting part, and the third reinforcing part are connected in sequence; Both the first reinforcing part and the third reinforcing part are "L" shaped structures, while the second reinforcing part is an arc-shaped structure. The connection points between the first reinforcing part and the first mounting part, the connection points between the first mounting part and the second reinforcing part, the connection points between the second reinforcing part and the second mounting part, and the connection points between the second mounting part and the third reinforcing part are all transitioned by arc segments; The first reinforcing part, the first mounting part, the second reinforcing part, the second mounting part, and the third reinforcing part are an integral structure.

[0012] As a further improvement and optimization of this solution, a first gap is formed between one side of the reinforcing block and the first reinforcing part, and a second gap is formed between the other side of the reinforcing block and the third reinforcing part, wherein the distance of the first gap is equal to the distance of the second gap.

[0013] As a further improvement and optimization of this solution, the stamping base is provided with reinforcing plates at both ends along its length, and each reinforcing plate extends upward and is bent or folded.

[0014] As a further improvement and optimization of this solution, structural adhesive is applied between the support body, the first mounting part and the rivet at that location.

[0015] As a further improvement and optimization of this solution, the top of the support body is provided with multiple connection holes, which are equally spaced along its length.

[0016] A battery pack housing includes any of the composite crossbeams described above.

[0017] The positive effects of the above technical solution compared with the existing technology are: (1) The separate design of the support body and the stamping base in this utility model provides stable support for the battery pack while meeting the requirements of the crossbeam height, which enhances the overall structural stability of the battery pack and avoids process defects such as cracking that may occur in deep drawing of sheet metal.

[0018] (2) In this utility model, multiple reinforcing blocks are set in the stamping space, which further enhances the structural strength and stability of the crossbeam. When the battery pack is subjected to X-direction compression, the reinforcing blocks can effectively disperse the stress, improve the load-bearing capacity of the crossbeam, and prevent the crossbeam from deforming or being damaged prematurely, thereby better protecting the cells in the battery pack.

[0019] (3) The stamping base and the support body, as well as the reinforcing block and the stamping base, are connected by rivets. The connection method has high strength and durability, and is not easy to loosen or fall off, ensuring that it can continuously enhance the structural strength during long-term use.

[0020] (4) Both the stamping base and the support body of this utility model are made of steel. Compared with traditional extruded aluminum profiles, the steel structure of the stamping base and support body greatly improves the overall strength of the crossbeam, effectively enhances the battery pack's ability to resist external pressure, reduces the risk of damage to the battery cells inside the battery pack due to crossbeam deformation, and improves the safety of the battery pack. Attached Figure Description

[0021] Figure 1 This is an exploded view of a composite beam according to the present invention. Figure 2 This is a schematic diagram showing the connection between the stamped base and the upper support of a composite crossbeam according to this utility model. Figure 3 This is a schematic diagram showing the connection between the stamped base and the reinforcing block of a composite crossbeam according to this utility model. In the attached diagram: 1. Stamping base; 2. Support body; 3. Reinforcing block; 4. Rivet; 11. Reinforcing plate; 12. Stamping space; 13. First reinforcing part; 14. First mounting part; 15. Second reinforcing part; 16. Second mounting part; 17. Third reinforcing part; 21. Connecting hole; 31. First gap; 32. Second gap. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Figure 1 This is an exploded view of a composite beam according to this utility model. Figure 2 This is a schematic diagram showing the connection between the stamped base and the upper support of a composite beam according to this utility model. Figure 3 This is a schematic diagram showing the connection between the stamped base and the reinforcing block of a composite beam according to this utility model. Figure 1-3 As shown, a composite beam according to a preferred embodiment includes: a stamping base 1 and a support body 2. The support body 2 is installed on the top of the stamping base 1 by rivets 4. A stamping space 12 is formed at the bottom of the stamping base 1. A plurality of reinforcing blocks 3 are distributed in the stamping space 12 along the length direction of the stamping base 1. Each reinforcing block 3 is connected to the stamping base 1 by rivets 4.

[0026] The separate design of the support body 2 and the stamping base 1 in this application provides stable support for the battery pack while meeting the requirements for the height of the crossbeam, enhancing the overall structural stability of the battery pack and avoiding process defects such as cracking that may occur in deep drawing of sheet metal.

[0027] In this application, multiple reinforcing blocks 3 are provided in the stamping space 12, which further enhances the structural strength and stability of the crossbeam. When the battery pack is subjected to X-axis compression, the reinforcing blocks 3 can effectively disperse stress, improve the load-bearing capacity of the crossbeam, and prevent the crossbeam from deforming or being damaged prematurely, thereby better protecting the cells in the battery pack.

[0028] In this application, the stamping base 1 and the support body 2, as well as the reinforcing block 3 and the stamping base 1, are connected by rivets 4. The connection method has high strength and durability, and is not easy to loosen or fall off, ensuring that it continues to play a role in enhancing the structural strength during long-term use.

[0029] Even better, the support body 2 is a "U"-shaped square steel. The "U"-shaped square steel support body 2 has high strength and rigidity, and can effectively resist external deformation. Its unique structural shape not only meets the height requirements of the crossbeam, but also provides stable support for the battery pack, enhances the overall structural stability of the battery pack, and avoids process defects such as cracking that may occur in deep drawing of sheet metal.

[0030] Furthermore, as a preferred embodiment, both the stamped base 1 and the support 2 are steel structures. The steel structure used for the stamped base 1 and support 2 significantly improves the overall strength of the crossbeam compared to traditional extruded aluminum profiles. This effectively enhances the battery pack's resistance to external pressure, reduces the risk of damage to the battery cells due to crossbeam deformation, and improves battery pack safety. The reinforcing block 3 is made of aluminum. Choosing aluminum as the reinforcing block 3 ensures a certain level of strength while reducing the overall weight of the crossbeam compared to steel structures. This helps reduce the overall weight of the battery pack, increasing the driving range of new energy vehicles. Simultaneously, the aluminum block has good corrosion resistance, extending the service life of the crossbeam.

[0031] Furthermore, in a preferred embodiment, the stamping base 1 includes a first mounting portion 14 and a second mounting portion 16, both of which are horizontally arranged. The first mounting portion 14 is higher than the second mounting portion 16. The support body 2 is mounted on the upper side of the first mounting portion 14 by rivets 4, and multiple reinforcing blocks 3 are respectively mounted on the lower side of the second mounting portion 16 by rivets 4. Dividing the stamping base 1 into a first mounting portion 14 and a second mounting portion 16 of different heights for mounting the support body 2 and reinforcing blocks 3 respectively makes the structural layout more reasonable, allowing each component to play its respective role and jointly improve the crossbeam's resistance to compression and other properties, thus better protecting the battery pack.

[0032] Furthermore, in a preferred embodiment, the width of the first mounting portion 14 is greater than the width of the second mounting portion 16; the width of the first mounting portion 14 is not greater than the width of the support body 2, and the sum of the widths of the first mounting portion 14 and the second mounting portion 16 is greater than the width of the reinforcing block 3. This reasonable width design ensures stable installation of the support body 2 and the reinforcing block 3 while also making the entire beam structure compact. It optimizes space utilization while meeting strength requirements, which is beneficial for improving the overall performance of the beam and the internal space layout of the battery pack.

[0033] Furthermore, in a preferred embodiment, the stamping base 1 further includes: a first reinforcing part 13, a second reinforcing part 15, and a third reinforcing part 17, which are connected sequentially; the first reinforcing part 13 and the third reinforcing part 17 are both "L"-shaped structures, and the second reinforcing part 15 is an arc-shaped structure; the connection between the first reinforcing part 13 and the first mounting part 14, the connection between the first mounting part 14 and the second reinforcing part 15, the connection between the second reinforcing part 15 and the second mounting part 16, and the connection between the second mounting part 16 and the third reinforcing part 17 are all arc-shaped transitions; the first reinforcing part 13, the first mounting part 14, the second reinforcing part 15, the second mounting part 16, and the third reinforcing part 17 are an integral structure. The L-shaped and arc-shaped structures, along with the design of the circular arc transition, can disperse stress, reduce stress concentration, and improve the overall strength and fatigue resistance of the stamped base 1. The integrated structure reduces the number of connection points, lowers the risk of connection failure, further enhances the stability and reliability of the crossbeam, and better protects the battery pack.

[0034] Furthermore, in a preferred embodiment, a first gap 31 is formed between one side of the reinforcing block 3 and the first reinforcing part 13, and a second gap 32 is formed between the other side of the reinforcing block 3 and the third reinforcing part 17. The distance of the first gap 31 is equal to the distance of the second gap 32. When the battery pack is subjected to external pressure, the crossbeam will bear and disperse these stresses. The design of the equidistant gaps makes the position of the reinforcing block relatively central within the stamping space and the stress environment symmetrical. When the stress is transmitted to the reinforcing block, it can be more evenly diffused to the first and third reinforcing parts on both sides, avoiding stress concentration in a localized area due to an excessively small or large gap on one side. Localized stress concentration can easily lead to structural damage, while uniformly dispersing the stress can effectively improve the overall compression resistance of the crossbeam and extend its service life.

[0035] Furthermore, in a preferred embodiment, the stamping base 1 has reinforcing plates 11 at both ends along its length, each reinforcing plate 11 extending upward and bending or folding. The upward-extending and bending or folding reinforcing plates 11 at both ends further enhance the strength of the stamping base 1, effectively resisting deformation under external force, preventing premature damage to the ends of the crossbeam, improving the overall compression resistance of the crossbeam, and better protecting the battery pack.

[0036] Furthermore, as a preferred embodiment, structural adhesive is applied between the support body 2, the first mounting part 14, and the rivet 4. The use of rivets 4 and structural adhesive for riveting combines the mechanical strength of the rivet connection with the sealing and shock-absorbing properties of the structural adhesive. This connection method ensures a firm connection between the support body 2 and the stamping base 1, improving the overall structural strength of the beam.

[0037] Furthermore, as a preferred embodiment, the top of the support body 2 is provided with a plurality of connection holes 21, which are equally spaced along its length. The provision of a plurality of equally spaced connection holes 21 on the top of the support body 2 facilitates the connection of the crossbeam with other components. Through these connection holes 21, the crossbeam can be easily fixedly connected with other structures within the battery pack, improving assembly efficiency and ensuring the reliability and stability of the connection, which is beneficial to the assembly and maintenance of the overall battery pack structure.

[0038] A battery pack housing includes any one of the aforementioned composite crossbeams. The battery pack housing employing the aforementioned composite crossbeams combines the advantages of various composite crossbeams, possessing higher structural strength and resistance to compression, effectively protecting the internal battery cells and reducing the risk of safety accidents caused by battery cell damage due to external compression.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite beam, characterized in that, include: A stamping base and a support body are provided. The support body is installed on the top of the stamping base by rivets. A stamping space is formed at the bottom of the stamping base. Multiple reinforcing blocks are distributed in the stamping space along the length of the stamping base. Each reinforcing block is connected to the stamping base by rivets.

2. The composite beam according to claim 1, characterized in that, Both the stamping base and the support body are steel structures; the reinforcing block is an aluminum block.

3. The composite beam according to claim 1, characterized in that, The stamping base includes a first mounting part and a second mounting part, both of which are horizontally arranged. The first mounting part is higher than the second mounting part. The support body is installed on the upper side of the first mounting part by rivets, and the plurality of reinforcing blocks are respectively installed on the lower side of the second mounting part by rivets.

4. The composite beam according to claim 3, characterized in that, The width of the first mounting part is greater than the width of the second mounting part; The width of the first mounting part is not greater than the width of the support body, and the sum of the widths of the first mounting part and the second mounting part is greater than the width of the reinforcing block.

5. The composite beam according to claim 3, characterized in that, The stamping base further includes: a first reinforcing part, a second reinforcing part, and a third reinforcing part, wherein the first reinforcing part, the first mounting part, the second reinforcing part, the second mounting part, and the third reinforcing part are connected in sequence; Both the first reinforcing part and the third reinforcing part are "L" shaped structures, while the second reinforcing part is an arc-shaped structure. The connection points between the first reinforcing part and the first mounting part, the connection points between the first mounting part and the second reinforcing part, the connection points between the second reinforcing part and the second mounting part, and the connection points between the second mounting part and the third reinforcing part are all transitioned by arc segments; The first reinforcing part, the first mounting part, the second reinforcing part, the second mounting part, and the third reinforcing part are an integral structure.

6. The composite beam according to claim 5, characterized in that, A first gap is formed between one side of the reinforcing block and the first reinforcing part, and a second gap is formed between the other side of the reinforcing block and the third reinforcing part. The distance of the first gap is equal to the distance of the second gap.

7. The composite beam according to claim 1, characterized in that, The stamping base is provided with reinforcing plates at both ends along its length, and each of the reinforcing plates extends upward and is bent or folded.

8. The composite beam according to claim 3, characterized in that, Structural adhesive is applied between the support body, the first mounting part, and the rivet at that location.

9. The composite beam according to claim 1, characterized in that, The top of the support body is provided with multiple connection holes, which are equally spaced along its length.

10. A battery pack housing, characterized in that, Includes the composite beam as described in any one of claims 1-9.

Images