Reinforcing structure and battery pack

Abstract

The utility model belongs to battery box body technical field provides strengthens structure and battery package, including box body frame, first expansion beam, second expansion beam, stringer, first reinforcing part and second reinforcing part, first expansion beam and second expansion beam are fixedly installed in the box body frame along the first direction, and both are parallel to each other, stringer is fixedly installed in the box body frame along the second direction, and the second direction is perpendicular to the first direction, first expansion beam, second expansion beam and stringer divide the inside part of box body frame into several areas together, and the area is used for installing the electric core family, first reinforcing part and second reinforcing part are all installed in the intersection position of second expansion beam and stringer. The utility model strengthens the intersection structure formed by second expansion beam and stringer in the box body frame through setting first reinforcing part and second reinforcing part, thereby absorbs the expansion force produced by the electric core family expansion, can effectively limit the electric core family expansion, guarantees the overall structural stability and safety of battery package.

Description

Technical Field

[0001] This utility model belongs to the field of battery box technology, and specifically relates to reinforced structures and battery packs. Background Technology

[0002] With the rapid development of the new energy vehicle market, the battery pack, as the power source of new energy vehicles, plays a crucial role in the safety and reliability of the entire system. Furthermore, as the energy density requirements of battery packs increase, it is necessary to arrange as many cells as possible within the limited space of the battery pack housing. Module-less battery packs, by eliminating the module end and side panels, free up space for the cells, thereby improving cell space utilization and reducing material costs.

[0003] In a moduleless battery pack, the battery cells are mounted between and abut against two expansion beams. The expansion beams serve to separate and limit the cells. During use, especially during charging and discharging, gas may be generated inside the cells, causing them to expand and increasing the overall module length. Therefore, the expansion beams need to have sufficient strength to absorb this expansion force, thereby limiting excessive cell expansion and ensuring the overall structural stability and safety of the battery pack. Utility Model Content

[0004] To address the problems in the background art, this utility model proposes a reinforced structure and a battery pack housing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a reinforced structure, including a box frame, a first expansion beam, a second expansion beam, a longitudinal beam, a first reinforcing member, and a second reinforcing member; The first expansion beam and the second expansion beam are fixedly installed inside the frame of the box along the first direction, and the two are parallel to each other; The longitudinal beam is fixedly installed inside the frame of the box along the second direction, and the second direction is perpendicular to the first direction; The first expansion beam, the second expansion beam, and the longitudinal beam together divide the interior of the enclosure frame into several areas, which are used to install battery cells. Both the first and second reinforcing members are installed at the intersection of the second expansion beam and the longitudinal beam.

[0006] Furthermore, along the first direction, two second expansion beams are provided, with the first expansion beam located between the two second expansion beams.

[0007] Furthermore, one end of the longitudinal beam abuts against the second expansion beam at the intersection, forming a T-shaped intersection structure, while the other end passes through the second expansion beam at the intersection, forming a cross-shaped intersection structure.

[0008] Furthermore, the longitudinal beam and the second expansion beam have a height difference in a third direction, forming a stepped structure; the third direction is perpendicular to the first direction and the second direction, respectively.

[0009] Furthermore, the first reinforcing member includes a first reinforcing seat and a first reinforcing plate; The first reinforcing plate and the first reinforcing seat are an integral structure, and the first reinforcing plate is fixedly connected to the higher surface of the stepped structure, while the first reinforcing seat is fixedly connected to the lower surface of the longitudinal beam. Furthermore, the first reinforcing member is fixedly connected at the position of the T-shaped intersecting structure.

[0010] Furthermore, the first reinforcing seat is a hollow extruded profile structure.

[0011] Furthermore, the second reinforcing member includes a second reinforcing seat and a second reinforcing plate; The second reinforcing plate is integrally connected to the second reinforcing seat at both ends. The second reinforcing plate is fixedly connected to the higher surface of the stepped structure, and the second reinforcing seat is fixedly connected to the lower surface of the longitudinal beam. Furthermore, the second reinforcing member is fixedly connected at the position of the cross-shaped intersecting structure.

[0012] Furthermore, the second reinforcing seat is a hollow extruded profile structure.

[0013] Furthermore, in the stepped structure, the height of the second expansion beam is greater than the height of the longitudinal beam.

[0014] This utility model also provides a battery pack, which is equipped with the above-mentioned reinforcing structure.

[0015] The beneficial effects of this utility model are: 1. This utility model strengthens the intersecting structure formed by the second expansion beam and the longitudinal beam inside the frame of the housing by setting the first and second reinforcing members. This can improve the strength of the second expansion beam and the longitudinal beam, thereby absorbing the expansion force generated by the expansion of the battery cell group, effectively limiting the expansion of the battery cell group, and ensuring the overall structural stability and safety of the battery pack.

[0016] 2. This utility model adds a reinforcing member to a portion of the expansion beam, allowing for extreme design of the expansion beam and reducing resource waste. Furthermore, the reinforcing member is a hollow extruded profile structure, the width of which can be freely adjusted according to the beam width, and the form can be varied according to the expansion force requirements. It does not occupy additional internal space of the battery pack, resulting in high adaptability. This structure is connected to the expansion beam by welding, eliminating the need for additional connectors, simplifying the construction, and saving labor and materials.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a reinforcing structure according to this utility model is shown; Figure 2 A schematic diagram of the first reinforcing member is shown; Figure 3 A schematic diagram of the second reinforcing member is shown; Figure 4 A schematic diagram of the welding between the first reinforcing member and the T-shaped intersecting structure is shown; Figure 5 A schematic diagram of the welding of the second reinforcing member to the cross-shaped structure is shown.

[0020] In the figure: 1. Box frame; 2. First expansion beam; 3. Second expansion beam; 4. Longitudinal beam; 5. Battery cell assembly; 6. First reinforcing member; 601. First reinforcing seat; 602. First reinforcing plate; 7. Second reinforcing member; 701. Second reinforcing seat; 702. Second reinforcing plate; 8. First weld; 9. Second weld. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1As shown, this is a reinforced structure that can be used in battery packs. It gives the battery pack housing stronger structural strength, stability and impact resistance, effectively protecting the battery cells inside the housing, improving the service life and safety performance of the battery pack housing, and the lightweight design of the reinforced structure can also reduce the overall weight of the battery pack housing, meeting the lightweight requirements of new energy equipment and suitable for various new energy vehicles, energy storage equipment and other scenarios.

[0023] Figure 1 The reinforcing structure includes a housing frame 1, a first expansion beam 2, a second expansion beam 3, a longitudinal beam 4, a first reinforcing member 6, and a second reinforcing member 7. Along a first direction (e.g., the length of the housing), the first expansion beam 2 and the second expansion beam 3 are welded to the inside of the housing frame 1 (or fixedly connected using an integral casting process), ensuring that the first expansion beam 2 and the second expansion beam 3 are parallel to each other. This arrangement allows the two expansion beams to form a stable supporting foundation in the first direction, providing a structural basis for subsequent partitioning of the area and supporting the battery cell cluster 5, effectively dispersing the force on the housing in the first direction.

[0024] The longitudinal beam 4 is fixedly installed inside the box frame 1 along a second direction (such as the width direction of the box, and the second direction is perpendicular to the first direction). Since the second direction is perpendicular to the first direction, the longitudinal beam 4 can form a cross support structure with the first expansion beam 2 and the second expansion beam 3, which greatly improves the overall structural stability inside the box frame 1 and avoids deformation of the box due to insufficient support in one direction.

[0025] The first expansion beam 2, the second expansion beam 3, and the longitudinal beam 4 intersect each other, collectively dividing the interior of the box frame 1 into several independent areas. These areas are specifically designed for installing the battery cell assembly 5. This partitioning structure not only positions the battery cell assembly 5, preventing it from shifting inside the box, but also provides good protection for the battery cell assembly 5 through the support of each beam, reducing the impact of external shocks on the battery cell assembly 5.

[0026] At the intersection of the second expansion beam 3 and the longitudinal beam 4, a first reinforcing member 6 and a second reinforcing member 7 are installed respectively. When the battery cell assembly 5 expands due to heat, the reinforcing members can specifically enhance the structural strength of the node, making the internal structure of the housing frame 1 more stable.

[0027] Optionally, two second expansion beams 3 are provided along the first direction, and the first expansion beam 2 is arranged between the two second expansion beams 3. This layout allows for more uniform support in the first direction, and compared to a single second expansion beam 3, it can more effectively distribute the load on the enclosure in the first direction. At the same time, it further refines the division of the internal areas of the enclosure, making the size of each area more suitable for the installation requirements of the battery cell family 5, and improving the overall stability of the battery cell family 5 after installation.

[0028] Optionally, one end of the longitudinal beam 4 abuts against the second expansion beam 3 at the intersection point, forming a T-shaped intersection structure; the other end of the longitudinal beam 4 passes through the second expansion beam 3 at the intersection point, forming a cross-shaped intersection structure. The T-shaped intersection structure can reduce the use of beam material and lower the overall weight of the structure while ensuring stable support at one end of the longitudinal beam 4; while the cross-shaped intersection structure allows the longitudinal beam 4 and the second expansion beam 3 to form a tighter connection, enhancing the torsional resistance and load-bearing capacity at the intersection point. The combination of the two intersection structures can meet the structural strength requirements at different locations while taking into account lightweight design.

[0029] The longitudinal beam 4 and the second expansion beam 3 have a height difference in a third direction (such as the height of the box body, and the third direction is perpendicular to the first and second directions respectively), forming a stepped structure. The stepped structure design allows the longitudinal beam 4 and the second expansion beam 3 to form a staggered layout in the height direction, avoiding excessive material accumulation at the same height. This reduces the structural weight and allows for the rational allocation of beam positions according to the different space requirements inside the box body. At the same time, the height difference can also enhance the structure's impact resistance to a certain extent, preventing external forces from acting directly on the same plane.

[0030] like Figure 2 As shown, the first reinforcing member 6 includes a first reinforcing seat 601 and a first reinforcing plate 602, and the first reinforcing plate 602 and the first reinforcing seat 601 are an integral structure. Figure 4 As can be seen, during installation, the first reinforcing plate 602 is welded to the higher surface of the stepped structure, and the first reinforcing seat 601 is welded to the lower surface of the longitudinal beam 4. Simultaneously, the first reinforcing member 6 is integrally fixed to the position of the T-shaped intersecting structure. The integrated structure design ensures the structural strength of the first reinforcing member 6 itself, avoiding the risk of breakage at the joints. Furthermore, its specific installation positions on the stepped and T-shaped intersecting structures effectively compensate for the weak points on the higher surfaces of the T-shaped intersecting and stepped structures, further enhancing the support capacity of that area.

[0031] Furthermore, the first reinforcing seat 601 is designed as a hollow extruded profile structure. This hollow extruded profile structure effectively reduces material usage and the overall weight of the reinforcing structure without compromising the supporting strength of the first reinforcing seat 601, meeting lightweight design requirements. It also facilitates positioning and operation during installation.

[0032] like Figure 3 As shown, the second reinforcing member 7 includes a second reinforcing seat 701 and a second reinforcing plate 702, with the second reinforcing seat 701 integrally connected to both ends of the second reinforcing plate 702. Figure 4As shown, during installation, the second reinforcing plate 702 is welded to the higher surface of the stepped structure, the second reinforcing seat 701 is welded to the lower surface of the longitudinal beam 4, and the second reinforcing member 7 is fixedly connected to the position of the "+" shaped intersection structure. The integrated structure with the second reinforcing seats 701 at both ends allows the second reinforcing member 7 to form more comprehensive support at the "+" shaped intersection structure. Compared with a single reinforcing plate, it can more effectively disperse the force at the "+" shaped intersection position, avoiding damage due to force concentration at this position; its compatible installation with the stepped structure can also further optimize the force distribution of the stepped structure.

[0033] Meanwhile, the second reinforcing seat 701 is designed as a hollow extruded profile structure. This design serves the same purpose as the hollow extruded profile structure of the first reinforcing seat 601, ensuring the structural strength of the second reinforcing seat 701 while reducing material consumption, lowering structural weight, and improving the overall lightweight level of the structure.

[0034] It should be noted that, Figure 2 and Figure 3 This corresponds to two structural forms of the reinforcing member. Since the reinforcing member is a hollow extruded profile structure, multiple pieces can be produced from a single mold, and then further processed to the required length (L). Different reinforcing members can be used for the expansion beam depending on the different expansion forces of the battery cell. When the expansion force is relatively small, a suitable reinforcing member can be selected. Figure 2 The first reinforcing member 6 is shown. When the expansion force is large, it can be selected. Figure 3 The second reinforcing member 7 is shown. It is placed on top of the second expansion beam 3 and the longitudinal beam 4, and the two beams are welded together to increase the strength of the second expansion beam 3. The length L of the reinforcing member is less than the width of the longitudinal beam 4, thus it does not occupy space in the width direction of the battery pack.

[0035] Furthermore, through Figure 4 It can be seen that the height of the second expansion beam 3 is greater than the height of the longitudinal beam 4. Therefore, both the first reinforcing plate 602 and the second reinforcing plate 702 are welded to the surface of the second expansion beam 3. In addition, the first reinforcing member 6 forms a uniform first weld 8 after being welded at the T-shaped structure position, while the second reinforcing member 7 forms a uniform second weld 9 after being welded at the "+"-shaped structure position.

[0036] It should be noted that the second expansion beam 3 plays a major supporting and separating role in the first direction. Its higher height allows it to have stronger load-bearing capacity and resistance to deformation, and better protect the battery cell cluster 5 installed in the separation area. The longitudinal beam 4 is relatively low in height. While meeting its own support requirements, it can reserve more space inside the box, and at the same time avoid excessive overlap with the second expansion beam 3 in the height direction, which would lead to material waste, thus achieving a balance between structural strength and space utilization.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reinforcing structure, characterized in that, It includes a box frame (1), a first expansion beam (2), a second expansion beam (3), a longitudinal beam (4), a first reinforcing member (6), and a second reinforcing member (7); The first expansion beam (2) and the second expansion beam (3) are fixedly installed inside the box frame (1) along the first direction, and the two are parallel to each other; The longitudinal beam (4) is fixedly installed inside the box frame (1) along the second direction, and the second direction is perpendicular to the first direction; The first expansion beam (2), the second expansion beam (3) and the longitudinal beam (4) together divide the interior of the box frame (1) into several areas, which are used to install the battery cell assembly (5). The first reinforcing member (6) and the second reinforcing member (7) are both installed at the intersection of the second expansion beam (3) and the longitudinal beam (4).

2. The reinforcing structure according to claim 1, characterized in that, Along the first direction, there are two second expansion beams (3), and the first expansion beam (2) is located between the two second expansion beams (3).

3. The reinforcing structure according to claim 1, characterized in that, One end of the longitudinal beam (4) abuts against the second expansion beam (3) at the intersection position to form a T-shaped intersection structure, and the other end passes through the second expansion beam (3) at the intersection position to form a cross-shaped intersection structure.

4. The reinforcing structure according to claim 3, characterized in that, The longitudinal beam (4) and the second expansion beam (3) have a height difference in a third direction, forming a stepped structure; the third direction is perpendicular to the first direction and the second direction respectively.

5. The reinforcing structure according to claim 4, characterized in that, The first reinforcing member (6) includes a first reinforcing seat (601) and a first reinforcing plate (602); The first reinforcing plate (602) and the first reinforcing seat (601) are an integral structure, and the first reinforcing plate (602) is fixedly connected to the higher surface of the stepped structure, and the first reinforcing seat (601) is fixedly connected to the lower surface of the longitudinal beam (4). Furthermore, the first reinforcing member (6) is fixedly connected to the position of the T-shaped intersecting structure.

6. The reinforcing structure according to claim 5, characterized in that, The first reinforcing seat (601) is a hollow extruded profile structure.

7. The reinforcing structure according to claim 4, characterized in that, The second reinforcing member (7) includes a second reinforcing seat (701) and a second reinforcing plate (702); The second reinforcing plate (702) is integrally connected to the second reinforcing seat (701) at both ends. The second reinforcing plate (702) is fixedly connected to the higher surface of the stepped structure, and the second reinforcing seat (701) is fixedly connected to the lower surface of the longitudinal beam (4). Furthermore, the second reinforcing member (7) is fixedly connected to the position of the "+" shaped intersecting structure.

8. A reinforcing structure according to claim 7, characterized in that, The second reinforcing seat (701) is a hollow extruded profile structure.

9. A reinforcing structure according to any one of claims 3-8, characterized in that, In the stepped structure, the height of the second expansion beam (3) is greater than the height of the longitudinal beam (4).

10. A battery pack, characterized in that, The battery pack is configured with a reinforcing structure as described in any one of claims 1-9.

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