Sheet metal cover plate for battery pack

Abstract

The utility model discloses a metal plate cover plate for a battery pack, and aims to overcome the defects that the space utilization rate of an existing plastic upper cover is low, and the metal plate upper cover is uneven and poor in sealing performance due to serious deformation. The battery module comprises the bottom plate and the side plates, the cover plate is provided with the reinforcing grains, and the reinforcing grains are formed by stamping through the stamping forming module, so that the surface flatness and the corresponding reinforcing grains can be obtained, the structural strength of the cover plate is improved, the deformation is reduced, the sealing performance is improved, and the sealing performance and the corresponding appearance of the battery module are improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage, and more specifically, it relates to a sheet metal cover for a battery pack. Background Technology

[0002] A battery pack consists of an outer casing and internal battery cells. The casing includes a top cover and a bottom. Some top covers are made of injection-molded plastic. The injection molding process requires the top cover to have a certain draft angle, which results in some wasted space. In the lithium battery industry, in order to increase the installed capacity within a standard shipping container, liquid-cooled energy storage battery packs have evolved from the original 1P52S to 1P104S, and the length of the battery pack has also increased from 1140mm to 2200mm. To accommodate this change in length, existing top covers need to be reinforced with ribs, which further occupies space and reduces energy density.

[0003] However, existing sheet metal covers have defects such as severe welding deformation, uneven surface, and poor sealing performance. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing plastic covers, which have low space utilization, and sheet metal covers, which suffer from severe deformation leading to unevenness and poor sealing performance. It provides a sheet metal cover for battery packs that can achieve surface flatness and corresponding reinforcing texture, improve the structural strength of the cover, reduce deformation, and improve sealing performance, thereby enhancing the sealing performance and appearance of the battery module.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A sheet metal cover for a battery pack, the sheet metal cover including a base plate and a side plate, the cover having reinforcing ridges formed by stamping using a stamping forming die.

[0007] The advantages of sheet metal covers over plastic covers are: sheet metal covers are thinner for the same strength; and they do not require draft angles, thus improving space utilization and increasing battery density.

[0008] The aforementioned features are achieved by stamping the sheet metal cover using a stamping die, which can obtain surface flatness and corresponding reinforcing texture, improve the structural strength of the cover, reduce deformation, and improve sealing performance, thereby enhancing the sealing performance and appearance of the battery module.

[0009] Preferably, the strengthening ribs include crossing ribs and bottom plate strengthening ribs. The crossing ribs cross the bottom plate and the side plates, and the crossing ribs are arranged at equal intervals along the fold between the bottom plate and the side plates. The function of the strengthening ribs is to improve the strength of the sheet metal cover. The crossing ribs strengthen the edges of the bottom plate and the side plates, enhancing the ability of the side plates and the bottom plate to resist bending. The equal interval arrangement makes the strength of all parts of the bottom plate and the side plates similar.

[0010] Preferably, the bottom plate strengthening ribs are arranged on the bottom plate, and the bottom plate strengthening ribs are arranged at equal intervals along the length direction of the bottom plate. Since the area of the bottom plate is relatively large, by arranging the bottom plate strengthening ribs, the strength of the bottom plate can be improved, resisting deformation under its own weight or external forces, thereby maintaining the surface flatness.

[0011] Preferably, the bottom plate strengthening ribs and the crossing ribs are arranged staggeredly in the length direction.

[0012] Preferably, the crossing ribs are symmetric about the fold.

[0013] Preferably, the crossing ribs are in a closed structure of a double-square shape.

[0014] Preferably, the bottom plate strengthening ribs are symmetric about the midline of the bottom plate, and both sides in the width direction of the bottom plate are symmetric about the midline. The above structure uniformly improves the strength of the cover.

[0015] Preferably, the strengthening ribs are in a concave structure.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) By adopting a sheet metal upper cover and a stamping die, the strengthening ribs and surface shaping are improved, enhancing the appearance and strength;

[0018] (2) The combination of the crossing ribs and the bottom plate strengthening ribs improves the ability of the sheet metal cover to resist the force of bending along the fold and the forces applied on the bottom plate and the side plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric view of one perspective of the present utility model;

[0020] Figure 2 is an axonometric view of another perspective of the present utility model;

[0021] In the figure:

[0022] Bottom plate 1, side plate 2, strengthening rib 3, crossing rib 31, bottom plate strengthening rib 32. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the present disclosure in conjunction with the drawings and embodiments.

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Example:

[0027] A sheet metal cover for a battery pack, as shown in the figure. Figure 1 , 2 As shown, the sheet metal cover includes a base plate 1 and a side plate 2. The cover plate is provided with reinforcing patterns 3, which are formed by stamping through a stamping forming module.

[0028] The base plate 1 and side plate 2 are bent at 90 degrees. Since it is a sheet metal structure, the angle between the side plate 2 and the base plate 1 is set to 90 degrees. This arrangement can improve space utilization and increase energy density.

[0029] By stamping the sheet metal cover with a stamping die, surface flatness and corresponding reinforcing texture can be obtained, thereby improving the structural strength of the cover, reducing deformation, and improving the sealing performance and appearance of the battery module.

[0030] The reinforcing pattern 3 includes a crossover pattern 31 and a base plate reinforcing pattern 32. The crossover pattern 31 crosses the base plate 1 and the side plate 2, while the base plate reinforcing pattern 3 is only arranged on the base plate 1. The crossover pattern 31 is evenly spaced along the folded edge between the base plate 1 and the side plate 2. The folded edge is the total folded edge formed by adding the fold lines between the three side plates 2 and the base plate 1 on the left, right, and rear sides of the base plate 1 (the front side needs to provide a maintenance window, making it impossible to provide an environment for processing the crossover pattern 31). The function of the reinforcing pattern 3 is to improve the strength of the sheet metal cover plate. The crossover pattern 31 reinforces the edges of the base plate 1 and the side plate 2, improving the bending resistance between the side plate 2 and the base plate 1. The evenly spaced arrangement makes the strength of the base plate 1 and the side plate 2 similar at various points. The base plate reinforcing pattern 32 is provided on the base plate 1, and the base plate reinforcing pattern 32 is evenly spaced along the length direction of the base plate 1. Since the base plate 1 has a large area, the strength of the base plate 1 reinforcement pattern 3 can be improved by setting the base plate 1 reinforcement pattern 3, resisting deformation under its own weight or external force, thereby maintaining the surface flatness.

[0031] The base plate reinforcing pattern 32 and the crossing pattern 31 are staggered along their length. The crossing pattern 31 is symmetrical about the folded edge. The crossing pattern 31 is a closed, U-shaped structure. The reinforcing pattern 3 is a concave structure.

[0032] The reinforcing texture 32 of the base plate is symmetrical about the centerline of the base plate 1, and the two sides of the base plate 1 in the width direction are symmetrical about the centerline. The structure uniformly improves the strength of the cover plate.

[0033] The advantages of sheet metal covers over plastic covers are: sheet metal covers are thinner for the same strength; and they do not require draft angles, thus improving space utilization and increasing battery density.

[0034] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A sheet metal cover for a battery pack, characterized in that, It includes a sheet metal cover body composed of a bottom plate, side plates and reinforcing lines, and the reinforcing lines are formed by stamping through a stamping die set; The reinforcing lines include spanning lines and bottom plate reinforcing lines. The spanning lines span across the bottom plate and the side plates, and the spanning lines are arranged at equal intervals along the hem between the bottom plate and the side plates; The bottom plate reinforcing lines are arranged on the bottom plate, and the bottom plate reinforcing lines are arranged at equal intervals along the length direction of the bottom plate; The bottom plate reinforcing lines and the spanning lines are arranged staggeredly in the length direction; The spanning lines are symmetric about the hem; The spanning lines are in a closed structure of a square frame; The bottom plate reinforcing lines are symmetric about the midline of the bottom plate, and both sides in the width direction of the bottom plate are symmetric about the midline; The reinforcing lines are concave structures.

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