Battery box body and battery pack

Abstract

The utility model provides a battery box and battery pack, wherein the battery box comprises a box body and a partition beam, the partition beam is arranged in the box body, the partition beam comprises a first partition plate and a second partition plate, the first partition plate and the second partition plate are oppositely arranged along the arrangement direction of two large surfaces of the partition beam, the first partition plate and the second partition plate are fixedly connected along at least one end in the plane direction of the partition beam large surface; at least one of the first partition plate and the second partition plate is further provided with a concave part. Compared with the prior art, the first partition plate and / or the second partition plate of the partition beam disclosed by the utility model are / is provided with the concave parts, so that the deformation resistance of the battery box body can be improved, and concentrated stress can be dispersed to a wider area due to the arrangement of the concave parts; resonance and deformation of the separation beam can be effectively restrained under the dynamic working conditions of vehicle running vibration, jolt and the like, and the dynamic rigidity of the separation beam is improved.

Description

Technical Field

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

[0002] In new energy battery systems, the battery separator beam, as a key component for maintaining the structural stability of the battery module, undertakes important functions such as separating individual battery cells, bearing the weight of the battery module, resisting external impact loads, and balancing internal stress distribution. Its structural strength is directly related to the safety and reliability of the battery module under complex operating conditions.

[0003] Currently, existing battery separator beams cannot be integrally formed by extrusion profiles because they need to match the shape of the enclosure. Instead, they need to be spliced ​​from sheet metal. However, such beams have significant strength defects. Due to the limitations of the material's mechanical properties, the battery separator beams are prone to plastic deformation or even breakage when subjected to thermal expansion stress generated during battery charging and discharging, bumps and vibrations during vehicle operation, or external collisions. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a battery box that can disperse concentrated stress, improve strength, and reduce the possibility of deformation when subjected to bumps, vibrations, or external impacts.

[0005] Another objective of this invention is to provide a battery pack.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery enclosure includes an enclosure body and a partition beam, wherein the partition beam is disposed within the enclosure body.

[0008] The partition beam includes a first partition plate and a second partition plate. The first partition plate and the second partition plate are arranged opposite to each other along the two large surfaces of the partition beam, and the first partition plate and the second partition plate are fixedly connected at least one end along the plane direction of the large surfaces of the partition beam.

[0009] At least one of the first partition plate and the second partition plate is further provided with a recess.

[0010] As can be seen from the above technical solutions, compared with the prior art, the recessed portion on the first and / or second partition plates of the partition beam disclosed in this utility model enables the partition beam to bear the load of the main body of the partition beam when bearing the weight of the battery module, thermal expansion stress or external impact force, thereby improving its resistance to deformation. Moreover, the recessed portion can change the stress transmission path of the partition beam, dispersing the concentrated stress to a wider area. Under dynamic conditions such as vehicle driving vibration and bumps, it can effectively suppress the resonance and deformation of the partition beam and improve its dynamic stiffness. Attached Figure Description

[0011] 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 only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the installation structure of the partition beam and the battery box as disclosed in the embodiment of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the partition beam disclosed in the embodiment of this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 100 - Divider beam, 101 - First divider plate, 102 - Second divider plate, 103 - Recessed portion

[0016] 200 - Box body. Detailed Implementation

[0017] In view of this, the core of this utility model is to provide a battery box that can disperse concentrated stress, improve strength, and reduce the possibility of deformation when subjected to bumps, vibrations, or external impacts.

[0018] Another key aspect of this invention is that it provides a battery pack.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Please refer to Figure 1 and Figure 2The battery box disclosed in this embodiment of the present invention includes a box body 200 and a partition beam 100. The partition beam 100 is disposed within the box body 200 and includes a first partition plate 101 and a second partition plate 102 that are separately and independently disposed. The first partition plate 101 and the second partition plate 102 are arranged opposite to each other along the two large surfaces of the partition beam 100, and the first partition plate 101 and the second partition plate 102 are fixedly connected at least one end along the plane of the large surfaces of the partition beam 100. At least one of the first partition plate 101 and the second partition plate 102 is further provided with a recess 103.

[0021] It should be explained that the "large surface" of the partition beam 100 usually refers to the surface with the largest area in the partition beam 100, which is relative to the "small surface" (the surface with a smaller area).

[0022] Compared with the prior art, the battery box disclosed in this utility model, with the recessed portion 103 on the first partition plate 101 and / or the second partition plate 102 of the partition beam 100, allows the partition beam 100 to bear the load of the main body of the partition beam when bearing the weight of the battery module, thermal expansion stress or external impact force, thereby improving its resistance to deformation. Moreover, the recessed portion 103 can change the stress transmission path of the partition beam 100, dispersing the concentrated stress to a wider area. Under dynamic conditions such as vehicle driving vibration and bumps, it can effectively suppress the resonance and deformation of the partition beam 100 and improve its dynamic stiffness.

[0023] It should be noted that the main body 200 is used to house the battery and is sealed to the main body by the cover to separate the battery from the external environment. The main body 200 is usually made of metal materials such as iron, aluminum, aluminum alloy, and stainless steel.

[0024] The partition beam 100 is placed inside the box body 200 and connected to the box frame to increase the strength of the box body 200. The partition beam 100 is usually made of metal materials such as iron, aluminum, aluminum alloy, and stainless steel.

[0025] The first partition plate 101 and the second partition plate 102 can be welded together, glued together, or connected by other means at least one end along their length.

[0026] It should be noted that the length direction refers to the extension direction of the 100mm large surface of the partition beam. Please refer to [reference needed] for details. Figure 2 .

[0027] To further enhance the strength of the partition beam 100, the first partition plate 101 and the second partition plate 102 disclosed in this embodiment of the utility model are provided with a plurality of recesses 103.

[0028] As a specific embodiment, the recesses 103 on the first partition plate 101 and the recesses 103 on the second partition plate 102 disclosed in the embodiments of the present utility model can be arranged in one-to-one correspondence. With this arrangement, the recesses 103 on the first partition plate 101 and the recesses 103 on the second partition plate 102 can be abutted against each other.

[0029] To further enhance the strength of the partition beam 100, the recesses 103 on the first partition plate 101 and the recesses 103 on the second partition plate 102 disclosed in the embodiments of the present utility model are connected. With this arrangement, the connection points between the first partition plate 101 and the second partition plate 102 are increased, and the concentrated stress can be further dispersed.

[0030] Among them, the recesses 103 on the first partition plate 101 and the recesses 103 on the second partition plate 102 can be connected by welding, can be glued, or can be connected by other means.

[0031] Certainly, the recesses 103 on the first partition plate 101 and the recesses 103 on the second partition plate 102 disclosed in the embodiments of the present utility model can also be arranged in a staggered manner. With this arrangement, not only can the local stress concentration phenomenon of the partition beam 100 be further reduced, the anti-deformation ability of the partition beam 100 be enhanced, but also the internal space of the partition beam 100 can be increased, thereby providing diversified layout paths for the wire harness, cooling pipeline, etc. of the battery module.

[0032] The embodiments of the present utility model do not limit the specific structure of the partition beam 100, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0033] As one of the embodiments of the present utility model, one end of the first partition plate 101 and the second partition plate 102 disclosed in the embodiments of the present utility model along their length directions are welded together to form a U-shaped structure. In this structure, one end of the first partition plate 101 and the second partition plate 102 along their length directions are welded together, and the opposite ends are respectively welded to the bottom plate of the battery box body 200. This structure constructs a stable triangular mechanical support system, can effectively disperse the concentrated stress, and further can enhance the overall bending and torsional resistance of the partition beam 100.

[0034] As another embodiment of the present utility model, both ends of the first partition plate 101 and the second partition plate 102 disclosed in the embodiments of the present utility model along their length directions are respectively welded together. With this arrangement, the partition beam 100 forms a closed structure similar to a "square" shape. By rigidly connecting the four sides, the overall mechanical performance of the partition beam 100 can be improved, so that the partition beam 100 can withstand greater vibration loads and thermal expansion stresses, and further reduce the risk of deformation.

[0035] To facilitate the connection between the partition beam 100 and the battery box 200, the first partition plate 101 and the second partition plate 102 disclosed in this embodiment of the present invention are provided with flanges at both ends along their width direction, wherein the flanges are connected to the bottom plate of the battery box 200.

[0036] This embodiment of the utility model does not specifically limit the distance between two adjacent recesses 103. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0037] As a specific embodiment, the distance between two adjacent recesses 103 disclosed in this utility model embodiment is L, wherein L ≥ 25 mm. For example, L can be 25 mm, 30 mm, or 35 mm.

[0038] Through experimental verification, when L < 25mm, the overall strength of the partition beam 100 will be weakened due to thinning during the stamping process. Therefore, L should be greater than or equal to 25mm.

[0039] This utility model embodiment also discloses a battery pack, including a battery box 200, a box cover and a battery pack. The battery box 200 is the battery box 200 disclosed in any embodiment of this utility model. The battery pack includes at least two individual batteries. The battery pack is placed inside the battery box. The box cover is fixedly connected to the battery box. Along the direction perpendicular to the bottom plate of the box, the ratio of the distance of the recess 103 from the bottom plate of the box to the height of the individual battery ranges from 10% to 30%.

[0040] As a specific embodiment, the ratio of the distance between the recessed portion 103 and the bottom plate of the casing to the height of the single battery cell can be 13%, 20%, or 25%.

[0041] Since the battery pack uses the battery housing disclosed in the present utility model embodiment, the battery pack also has the technical advantages of the battery housing disclosed in the present utility model embodiment, and the present utility model embodiment will not elaborate on these advantages further.

[0042] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery housing, characterized in that, It includes a box body and a partition beam, wherein the partition beam is disposed within the box body; The partition beam includes a first partition plate and a second partition plate that are separately arranged. The first partition plate and the second partition plate are arranged opposite to each other along the two large surfaces of the partition beam, and the first partition plate and the second partition plate are fixedly connected at least one end along the plane direction of the large surfaces of the partition beam. At least one of the first partition plate and the second partition plate is further provided with a recess.

2. The battery housing according to claim 1, characterized in that, Both the first partition plate and the second partition plate are provided with a plurality of the aforementioned recesses.

3. The battery housing according to claim 2, characterized in that, The recesses on the first partition plate and the recesses on the second partition plate are provided in a one-to-one correspondence.

4. The battery housing according to claim 3, characterized in that, The recessed portion on the first partition plate is connected to the recessed portion on the second partition plate.

5. The battery housing according to claim 2, characterized in that, The recesses on the first partition plate and the recesses on the second partition plate are misaligned.

6. The battery housing according to claim 1, characterized in that, The first partition plate and the second partition plate are welded together at one end along their length to form a zigzag structure.

7. The battery housing according to claim 1, characterized in that, The two ends of the first partition plate and the second partition plate, which are arranged along their length, are welded together.

8. The battery housing according to claim 1, characterized in that, Both ends of the first and second partition plates are provided with flanges along their width direction, and the flanges are connected to the bottom plate of the battery box.

9. The battery housing according to claim 1, characterized in that, The distance between two adjacent recesses is L, where L ≥ 25 mm.

10. A battery pack, characterized in that, The battery includes a battery housing, a cover, and a battery pack. The battery housing is as described in any one of claims 1-9. The battery pack includes at least two individual cells. The battery pack is placed inside the battery housing. The cover is fixedly connected to the battery housing. Along a direction perpendicular to the bottom plate of the battery housing, the ratio of the distance from the recessed portion to the bottom plate of the battery housing to the height of the individual cell ranges from 10% to 30%.

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