Battery pack box cover

Abstract

The utility model provides a battery pack box cover which comprises a box cover body and a side plate structure arranged in the circumferential direction of the box cover body, the box cover body is a plate, the box cover body and the side plate structure are of an integrated structure, and the side plate structure comprises an inner side plate and an outer side plate which are arranged in parallel at intervals. The outer side plate is arranged on the outer side of the inner side plate, the inner side plate is connected with the box cover body, the inner side plate is perpendicular to the box cover body, and the side plate structure is formed by bending. The box cover body is of a double-layer structure in the circumferential direction, so that the deformation resistance of the box cover in the circumferential direction is improved, and the sealing failure of the battery pack caused by deformation of the box cover after collision can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery pack cover. Background Art

[0002] Currently, there are two types of battery pack cover structures. One type is a cover made solely of sheet metal. This type of cover is relatively thin, and the sealing surface of the cover is prone to deformation during the production process, affecting the sealing of the battery pack. The other type consists of a sheet metal cover and a sheet metal molding. This type of cover has a certain degree of improvement in structural strength, but the sheet metal cover and the sheet metal molding are usually welded or assembled together. When connected by assembly, since the sheet metal cover and the sheet metal molding are independent parts, deformation can still occur during the connection process, which in turn affects the cover assembly and the battery pack sealing. When connected by welding, the welding process can cause deformation of the sheet metal parts, affecting the structural dimensions of the sheet metal parts, which also affects the sealing of the battery pack. Utility Model Content

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and to propose a battery pack cover which has a double-layer structure in the circumferential direction, thereby improving the cover's ability to resist deformation in the circumferential direction and reducing the risk of seal failure of the battery pack caused by deformation of the cover after a collision.

[0004] The utility model proposes a battery pack box cover, comprising a box cover body and a side panel structure circumferentially arranged around the box cover body. The box cover body is a plate material, and the box cover body and the side panel structure are an integrated structure. The side panel structure comprises an inner panel and an outer panel arranged in parallel and spaced apart. The outer panel is arranged on the outside of the inner panel, the inner panel is connected to the box cover body, and the inner panel is perpendicular to the box cover body. The side panel structure is bent into shape.

[0005] A better technical solution of the present invention is as follows: a connecting plate and an inner plate are provided between the inner side panel and the box cover body, the inner plate is parallel to the box cover body, the connecting plate is obliquely connected to the inner plate and the box cover body, and the inner plate is connected to the inner side panel.

[0006] A better technical solution of the present invention is that the angle between the connecting plate and the inner siding is 135°.

[0007] A better technical solution of the present invention is as follows: an outer panel is provided above the inner panel, the outer panel is parallel to the inner panel, and mounting holes for attaching fasteners are provided on the outer panel, and the mounting holes pass through the inner panel.

[0008] A better technical solution of the utility model is that the inner cladding and the outer cladding are spaced apart.

[0009] A better technical solution of the present invention is that the spacing between the inner cladding and the outer cladding is 0.1mm-0.2mm.

[0010] A better technical solution of the present invention is that the inner plate and the outer plate are spaced apart.

[0011] A better technical solution of the present invention is that the spacing between the inner plate and the outer plate is 0.1mm-0.2mm.

[0012] A better technical solution of the present invention is that an outwardly protruding convex structure is provided in the middle of the box cover body, and a plurality of the convex structures are evenly spaced and arranged.

[0013] A better technical solution of the present invention is as follows: a plurality of side panel structures are circumferentially arranged around the box cover body, and the plurality of side panel structures are welded end to end and connected.

[0014] The battery pack cover of the utility model has the following beneficial effects:

[0015] 1. The cover body is provided with a side panel structure in the circumferential direction. The side panel structure includes an inner panel and an outer panel that are parallel to each other. The inner panel is vertically connected to the cover body. The inner panel and the outer panel form a double-layer structure, which increases the cover body's ability to resist deformation in the circumferential direction, thereby improving the sealing of the battery pack.

[0016] 2. The side panel structure includes an inner panel and an outer panel parallel to the box cover body. The inner and outer panels form a double-layer structure, which increases the deformation resistance of the side of the box cover body in the thickness direction and improves the sealing of the battery pack;

[0017] 3. The middle part of the box cover is provided with a convex bulge structure to improve the strength of the middle part of the box cover body and prevent the middle part of the box cover body from being depressed by pressure, which would affect the internal cells of the battery pack;

[0018] 4. The structure of the present application is formed in one piece by bending the box cover body. The process is mature and the processing cost is low. At the same time, welding operations are reduced, and the risk of structural deformation caused by welding operations is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0021] Figure 2 It is a cross-sectional view of an embodiment of the present utility model.

[0022] Figure 3 For the embodiment of the utility model Figure 1 Enlarged view of point A in the middle.

[0023] In the figure: 10, box cover body; 11, convex structure; 20, side panel structure; 21, connecting plate; 22, inner plate; 23, inner side plate; 24, outer plate; 25, outer plate; 251, mounting hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other.

[0025] See also Figures 1 to 3 A battery pack cover includes a cover body 10 and a side plate structure 20. The cover body 10 is plate-shaped. The side plate structure 20 is circumferentially arranged around the cover body 10. The side plate structure 20 includes an inner plate 23 and an outer plate 24 that are parallel to each other. The inner plate 23 is perpendicular to the cover body 10. The inner plate 23 and the outer plate 24 form a double-layer structure on the circumferential surface of the cover to improve the circumferential deformation resistance of the cover body 10 and prevent the battery pack sealing from being damaged due to deformation of the cover body 10.

[0026] In the prior art, battery pack structures are similar to rectangular parallelepipeds, and correspondingly, the battery pack cover is shaped similar to a rectangle. Taking the most common battery pack structure as an example, in this embodiment, the cover body 10 is plate-shaped, with an outer shape similar to a rectangle, and the side panel structure 20 is provided on the four circumferential surfaces of the cover body 10.

[0027] The side panel structure 20 includes a connecting plate 21, an inner strap 22, an inner side panel 23, an outer side panel 24, and an outer strap 25, which are connected in sequence. The inner strap 22 is used to connect the cover body 10 to the battery pack. The inner strap 22 is arranged parallel to the bottom of the cover body 10. The connecting plate 21 connects the cover body 10 and the inner strap 22. When the cover body 10 is connected to the battery pack, the cover body 10 protrudes relative to the inner strap 22, leaving a certain space below the cover body 10 for internal connections of the battery pack.

[0028] The four connecting plates 21 are obliquely arranged on the four circumferential surfaces of the lid body 10, and the angle between the connecting plates 21 and the lid body 10 is obtuse. This allows the four connecting plates 21 to surround the lid body 10 in the middle. When the connecting plates 21 are hit from the sides of the lid body 10 or from a direction perpendicular to the lid body 10, they are less likely to deform or dent, thereby protecting the internal components of the lid body 10. Specifically, the angle between the connecting plates 21 and the lid body 10 is 135°.

[0029] It should be noted that the side panel structures 20 arranged around the box cover body 10 are structurally the same, but there are differences in their sizes. Their length dimensions should correspond to the side dimensions of the box cover body 10. For example, the length of the two side panel structures 20 arranged in the width direction of the box cover body 10 is smaller than the length of the two side panel structures 20 arranged in the length direction of the box cover body 10.

[0030] The inner panel 23 is positioned perpendicular to the inner bridge 22. When the cover body 10 is connected to the battery pack, the inner panel 23 provides protection around the outside of the cover body 10, mitigating damage from impacts perpendicular to its sides. The outer panel 24 is positioned outside the inner panel 23 and parallel to it. This double-layer structure further enhances the cover body 10's resistance to circumferential deformation.

[0031] The outer strap 25 is positioned parallel to and above the inner strap 22. Mounting holes 251 are defined in the outer strap 25 and extend through the inner strap 22. Fasteners are located within these holes to connect the cover body 10 to the battery pack. The cover body 10 is connected to the battery pack, and the inner strap 22 and outer strap 25 form a double-layer structure across the thickness of the cover body 10. This enhances the cover body 10's side deformation resistance in this direction, further improving the battery pack's seal.

[0032] In this embodiment, the side panel structure 20 is an integral structure with the lid body 10. The side panel structure 20 is formed by bending sheet metal from the lid body 10. To avoid manufacturing errors during the bending process, the inner side panel 23 and the outer side panel 24 are spaced apart from each other, and the spacing between the inner side panel 23 and the outer side panel 24 is 0.1-0.2mm, specifically 0.1mm in this embodiment. Similarly, the inner and outer panels 22 and 25 are spaced apart from each other, and the spacing between the inner and outer panels 22 and 25 is 0.1-0.2mm, specifically 0.1mm in this embodiment, to reduce manufacturing errors.

[0033] The four side panel structures 20 are arranged on the four circumferential surfaces of the box cover body 10. The side panel structures 20 are welded end to end to form a complete protection around the outer periphery of the box cover body 10, thereby improving the circumferential deformation resistance of the box cover body 10.

[0034] The lid body 10 is provided with an outwardly protruding convex structure 11 in the middle. Several convex structures 11 are evenly spaced to form a bend in the middle of the lid body 10, thereby enhancing the compressive strength of the middle portion of the lid body 10. Preferably, the connection between the convex structure 11 and the lid body 10 should be rounded to avoid stress concentration.

[0035] In this embodiment, the side panel structure 20 is formed by bending the side of the box cover body 10, and the convex structure 11 is stamped by the box cover body 10. The overall structure processing technology is mature and simple, with low cost, which reduces the proportion of welding connections in the overall structure, thereby reducing the deformation problem of the box cover body 10 caused by welding.

[0036] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery pack cover, characterized in that: The invention comprises a box cover body (10) and a side plate structure (20) circumferentially arranged around the box cover body (10); the box cover body (10) is a plate; the box cover body (10) and the side plate structure (20) are an integral structure; the side plate structure (20) comprises an inner plate (23) and an outer plate (24) arranged in parallel and spaced apart; the outer plate (24) is arranged outside the inner plate (23); the inner plate (23) is connected to the box cover body (10), and the inner plate (23) is perpendicular to the box cover body (10); and the side plate structure (20) is formed by bending.

2. The battery pack cover according to claim 1, characterized in that: A connecting plate (21) and an inner bridging plate (22) are provided between the inner side plate (23) and the box cover body (10); the inner bridging plate (22) is parallel to the box cover body (10); the connecting plate (21) obliquely connects the inner bridging plate (22) and the box cover body (10); and the inner bridging plate (22) is connected to the inner side plate (23).

3. The battery pack cover according to claim 2, characterized in that: The angle between the connecting plate (21) and the inner slab (22) is 135°.

4. The battery pack cover according to claim 2, characterized in that: An outer panel (25) is provided above the inner panel (22), the outer panel (25) being parallel to the inner panel (22), and a mounting hole (251) for attaching a fastener is provided on the outer panel (25), the mounting hole (251) passing through the inner panel (22).

5. The battery pack cover according to claim 4, characterized in that: The inner cladding (22) and the outer cladding (25) are spaced apart.

6. The battery pack cover according to claim 5, characterized in that: The spacing between the inner cladding plate (22) and the outer cladding plate (25) is 0.1 mm to 0.2 mm.

7. The battery pack cover according to claim 1, characterized in that: The inner plate (23) and the outer plate (24) are spaced apart.

8. The battery pack cover according to claim 7, characterized in that: The distance between the inner plate (23) and the outer plate (24) is 0.1 mm to 0.2 mm.

9. The battery pack cover according to claim 1, characterized in that: An outwardly protruding convex structure (11) is provided in the middle of the box cover body (10), and a plurality of the convex structures (11) are evenly spaced and arranged.

10. The battery pack cover according to claim 1, characterized in that: A plurality of the side plate structures (20) are circumferentially arranged around the box cover body (10), and the plurality of side plate structures (20) are welded end to end.

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