Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack, and particularly relates to the technical field of batteries. The battery box body comprises a box body frame, a plurality of lifting lugs and a plurality of patches. Wherein the plurality of lifting lugs are respectively connected to the box body frame. Each patch corresponds to the corresponding lifting lug, one face of each patch is connected with the box frame, and the other face of each patch is connected with the corresponding lifting lug. Therefore, the patches are arranged between the box body frame and the lifting lugs of the battery box body, and transition is carried out between the box body frame and the lifting lugs through the patches, so that local welding stress concentration is effectively reduced, and the structural strength of the battery box body is greatly improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery housing and a battery pack. Background Technology

[0002] With technological advancements and increasing demand for renewable energy, power batteries have been widely applied in numerous fields, including electric vehicles, renewable energy storage, consumer electronics, and industrial equipment. In particular, the power batteries in new energy vehicles meet the vehicle's energy needs by connecting multiple modules in series or parallel. The battery housing, as a core component of the power battery system, is currently the primary method for integrating power batteries.

[0003] During the use of the battery box, it is usually necessary to ensure that the lifting lugs of the battery box are compatible with the vehicle assembly. The position and flatness of the lifting lugs have strict requirements, and they need to have a certain strength.

[0004] However, in existing battery enclosures, the rectangular tube lifting lugs are typically connected to the enclosure frame using gas shielded welding. This method easily leads to stress concentration, affecting the strength of the lifting lugs and causing them to crack frequently during vibration. Furthermore, because the stress is concentrated at the lifting lugs and there are many welds applied, welding deformation is likely to occur, and the resulting deformation is significant, making it difficult to control the positional accuracy and flatness of the lifting lugs. Utility Model Content

[0005] This application provides a battery housing and a battery pack. A patch is placed between the housing frame and the lifting lugs of the battery housing. This patch provides a transition between the housing frame and the lifting lugs, effectively reducing localized welding stress concentration and significantly improving the structural strength of the battery housing.

[0006] The first aspect of this application provides a battery housing, comprising:

[0007] Box frame;

[0008] Several lifting lugs are connected to the box frame respectively;

[0009] Several patches, each patch corresponding to a lifting lug, one side of the patch is connected to the cabinet frame, and the other side of the patch is connected to the lifting lug.

[0010] The battery casing provided in the first aspect of this application includes a casing frame, a plurality of lifting lugs, and a plurality of patches. The lifting lugs are respectively connected to the casing frame. Each patch corresponds to a lifting lug, with one side of the patch connected to the casing frame and the other side connected to the lifting lug. By placing patches between the casing frame and the lifting lugs, the transition between the casing frame and the lifting lugs is effectively reduced, localized welding stress concentration is significantly improved, and the structural strength of the battery casing is greatly enhanced.

[0011] In one possible implementation, the patch covers the lug with its orthogonal projection toward the lug.

[0012] In one possible implementation, the lifting lug includes a main body that protrudes from the housing frame;

[0013] The main body has a hollow cavity that is connected to the outside.

[0014] In one possible implementation, the main body has mounting holes for hoisting the battery box.

[0015] In one possible implementation, the lug further includes an extension, the outer periphery of the end of the lug facing the housing frame having an extension, and the extension being used for fixed connection with the patch.

[0016] In one possible implementation, the thickness of the housing frame ranges from 0 to 1 mm.

[0017] In one possible implementation, the thickness of the patch ranges from 1 to 1.5 mm.

[0018] In one possible implementation, the thickness of the lug is greater than or equal to 2 mm.

[0019] In one possible implementation, the patch and the housing frame are connected by laser welding.

[0020] A second aspect of this application provides a battery pack, comprising:

[0021] Battery module and the aforementioned battery housing;

[0022] The battery module is located inside the battery housing.

[0023] It should be understood that the second aspect of this application corresponds to the technical solution of the first aspect of this application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation are similar, and will not be repeated here.

[0024] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems solved by the battery box and battery pack provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the battery box provided in an embodiment of this application;

[0027] Figure 2 This is a partial structural diagram of the battery housing provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the lifting lugs of the battery box provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 - Battery housing;

[0031] 200-Box frame;

[0032] 300 - Lifting lug; 310 - Main body; 311 - Hollow cavity; 312 - Mounting hole; 320 - Extension;

[0033] 400-Patch. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] As described in the background section, in existing battery enclosures, the rectangular tube lifting lugs are typically connected to the enclosure frame using gas shielded welding. This method easily leads to stress concentration, affecting the strength of the lifting lugs and frequently causing them to crack during vibration. Furthermore, due to the concentrated stress at the lifting lugs and the numerous welds applied, welding deformation is prone to occur, and the resulting deformation is significant, making it difficult to control the positional accuracy and flatness of the lifting lugs.

[0036] To address the aforementioned technical problems, the first aspect of this application provides a battery housing. The battery housing includes a housing frame, a plurality of lifting lugs, and a plurality of patches. The lifting lugs are respectively connected to the housing frame. Each patch corresponds to a lifting lug, with one side of the patch connected to the housing frame and the other side connected to the lifting lug. By placing patches between the housing frame and the lifting lugs, the transition between the housing frame and the lifting lugs is effectively reduced, localized welding stress concentration is significantly improved, and the structural strength of the battery housing is greatly enhanced.

[0037] A second aspect of this application provides a battery pack. The battery pack includes a battery module and the aforementioned battery housing. The battery module is located within the battery housing.

[0038] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] This application provides a battery housing and a battery pack. A patch is placed between the battery housing frame and the lifting lugs, providing a transition between them and effectively reducing localized welding stress concentration, thus significantly improving the structural strength of the battery housing. The specific structure of the battery housing and battery pack provided in this application embodiment is described below with reference to the accompanying drawings.

[0040] refer to Figure 1 This application provides a battery housing 100 in a first aspect. The battery housing 100 may include a housing frame 200, lifting lugs 300, and a patch 400. In one possible implementation, such as... Figure 1 As shown, the box frame 200 can be a rectangular structure; however, this embodiment does not limit the shape of the box frame 200. In this embodiment, reference... Figure 2The lifting lug 300 can be connected to the cabinet frame 200. It can be understood that the patch 400 can be located between the lifting lug 300 and the cabinet frame 200, with one side of the patch 400 connected to the cabinet frame 200 and the other side of the patch 400 connected to the lifting lug 300.

[0041] Continue to refer to Figure 1 Based on the above embodiments, in one possible implementation, the number of lifting lugs 300 and patches 400 can be several. This application embodiment does not limit the number of lifting lugs 300 and patches 400. In this application embodiment, each patch 400 can correspond to each lifting lug 300. Thus, several lifting lugs 300 can be connected to the outer wall of the housing frame 200, and the corresponding patch 400 can be located between the lifting lug 300 and the housing frame 200, allowing the patch 400 to transition between the housing frame 200 and the lifting lug 300. This effectively reduces local welding stress concentration during the welding process of the lifting lug 300 and the housing frame 200, thereby significantly improving the structural strength of the battery housing 100.

[0042] Continue to refer to Figure 2 Based on the above embodiments, in one possible implementation, the orthographic projection of the patch 400 toward the lug 300 can cover the lug 300. It is understood that the size of the patch 400 can be greater than or equal to the size of the end of the lug 300 facing the housing frame 200. This allows the lug 300 and the patch 400 to be fitted together, thereby fixing the lug 300 to the housing frame 200 via the patch 400, preventing the lug 300 from directly contacting the housing frame 200.

[0043] refer to Figure 2 as well as Figure 3 Based on the above embodiments, in one possible implementation, the lifting lug 300 may further include a main body 310. The main body 310 may protrude from the housing frame 200. In this embodiment, the main body 310 may have a hollow cavity 311, and the hollow cavity 311 is connected to the outside. It is understood that by creating a hollow cavity 311 inside the main body 310, the amount of material used can be reduced, thereby reducing the overall weight of the lifting lug 300. The hollow cavity 311 also enables the lifting lug 300 to have higher strength and rigidity.

[0044] Continue to refer to Figure 2Based on the above embodiments, in one possible implementation, the main body 310 may be provided with mounting holes 312. It is understood that the mounting holes 312 can be used for lifting the battery box 100. Thus, the mounting holes 312 of the lifting lugs 300 can cooperate with the vehicle assembly, thereby enabling the lifting of the battery box 100 through the mounting holes 312 of the lifting lugs 300.

[0045] Continue to refer to Figure 2 Based on the above embodiments, in one possible implementation, the lifting lug 300 may further include an extension 320. The end of the lifting lug 300 facing the housing frame 200 may have the extension 320. The extension 320 may be located on the outer periphery of the end of the lifting lug 300 facing the housing frame 200. It is understood that the extension 320 can be used to fixably connect to the patch 400.

[0046] Based on the above embodiments, it can be understood that the extension 320 can be arranged at a certain angle to the main body 310. In one possible implementation, the extension 320 can be arranged perpendicularly to the main body 310, which is not limited in this application embodiment. In this application embodiment, the main body 310 extends outward toward the outer side of the box frame 200, and the extension 320 can be attached to the patch 400, and the size of the patch 400 is greater than or equal to the size of the extension 320, so as to facilitate the fixed connection between the extension 320 and the patch 400. In this way, the lifting lug 300 can be fixedly connected through the extension 320 and the patch 400.

[0047] Based on the above embodiments, in one possible implementation, the thickness of the box frame 200 can range from 0 to 1 mm. In this embodiment, for example, the thickness of the box frame 200 can be 1 mm.

[0048] Based on the above embodiments, in one possible implementation, the thickness of the patch 400 can range from 1 to 1.5 mm. In this embodiment, for example, the thickness of the patch 400 can be 1.5 mm.

[0049] Based on the above embodiments, in one possible implementation, the thickness of the lifting lug 300 can be greater than or equal to 2 mm. In this application embodiment, exemplarily, the thickness of the lifting lug 300 can be 2 mm.

[0050] It is understandable that if the lifting lug 300 and the housing frame 200 are directly fixed together by welding, the thickness difference between the lifting lug 300 and the housing frame 200 may cause the lifting lug 300 to weld directly through the housing frame 200. The battery housing 100 provided in this embodiment features a patch 400 structure, which allows the patch 400 to transition between the lifting lug 300 and the housing frame 200, avoiding direct welding between the lifting lug 300 and the housing frame 200, and significantly improving the overall structural strength.

[0051] Based on the above embodiments, in one possible implementation, the patch 400 and the housing frame 200 can be fixedly connected by laser welding. It is understood that laser welding has advantages such as high strength, high reliability, and high speed. Compared with the gas shielded welding method used in related technologies, laser welding can effectively improve the deformation degree of the battery housing 100 and effectively control the position and flatness of the mounting holes 312 of the lifting lugs 300.

[0052] Based on the above embodiments, in one possible implementation, the lifting lug 300 can be a lug 300 processed from a metal sheet by a stamping process. The stamping process uses a die and a punch press to cut and shape the metal sheet into the desired shape. In the embodiments of this application, the stamped lifting lug 300 provided in this application has advantages such as high strength, lightweight, and high efficiency. Compared with the rectangular tube lifting lug 300 used in related technologies, the stamped lifting lug 300 can improve structural strength and avoid cracking of the lifting lug 300 during vibration.

[0053] Based on the above embodiments, in one possible implementation, the box frame 200 can be made of steel. In this embodiment, the box frame 200 can be manufactured by roll forming and then welded together as a whole. It is understood that the box frame 200 made of steel has high strength and other characteristics, which enhances the service life of the box frame 200.

[0054] This application provides a battery pack (not shown in the figures) in a second aspect. The battery pack may include battery modules (not shown in the figures) and the aforementioned battery housing 100. In one possible implementation, the number of battery modules can be several; this application does not limit the number of battery modules. In this application embodiment, several battery modules may be located within the battery housing 100.

[0055] In this embodiment of the application, the battery box 100 provided in this embodiment of the application can provide a patch 400 between the box frame 200 and the lifting lug 300 of the battery box 100. The patch 400 provides a transition between the box frame 200 and the lifting lug 300, which effectively reduces the local welding stress concentration and greatly improves the structural strength of the battery box 100.

[0056] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0057] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0058] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0059] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0060] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0061] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A battery housing, characterized in that, include: Box frame; A plurality of lifting lugs, wherein the plurality of lifting lugs are respectively connected to the box frame; Several patches, each patch corresponding to a lifting lug, one side of the patch being connected to the housing frame, and the other side of the patch being connected to the lifting lug.

2. The battery housing according to claim 1, characterized in that, The patch's orthogonal projection toward the lug covers the lug.

3. The battery housing according to claim 2, characterized in that, The lifting lug includes a main body that protrudes from the box frame; The main body has a hollow cavity that is connected to the outside.

4. The battery housing according to claim 3, characterized in that, The main body has mounting holes for hoisting the battery box.

5. The battery housing according to claim 3, characterized in that, The lifting lug further includes an extension, which has the extension on the outer periphery of one end of the lifting lug facing the housing frame, and the extension is used to be fixedly connected to the patch.

6. The battery housing according to any one of claims 1-5, characterized in that, The thickness of the box frame ranges from 0 to 1 mm.

7. The battery housing according to any one of claims 1-5, characterized in that, The thickness of the patch ranges from 1 to 1.5 mm.

8. The battery housing according to any one of claims 1-5, characterized in that, The thickness of the lifting lug is greater than or equal to 2mm.

9. The battery housing according to any one of claims 1-5, characterized in that, The patch and the housing frame are connected by laser welding.

10. A battery pack, characterized in that, include: The battery module and the battery housing as described in any one of claims 1-9; The battery module is located inside the battery housing.

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