Upper cover assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to an upper cover assembly and a battery pack, and provides the upper cover assembly which comprises an upper cover and a lower cover, the flange is arranged on the bottom edge of the upper cover; wherein at least one corner position of the flange is provided with a reinforcing structure; the reinforcing structures are arranged in the length direction and the width direction of the flange, the flange and the side wall of the upper cover are supported by the reinforcing structures, the structural strength of the connecting portion of the side wall of the upper cover of the energy storage battery pack and the flange is improved, and the problem of structural cracking caused by stress concentration of the local position of the upper cover of the large energy storage battery pack under the severe transportation working condition is solved; and the stability and the reliability of the installation of the battery pack and the battery rack are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more particularly, to an upper cover assembly and a battery pack. Background Art

[0002] With the rapid development of the energy storage industry, energy storage battery packs have been widely used. As a key component to ensure the overall structural reliability of the battery pack, the structural strength of the battery pack upper cover is very important. During the transportation of the battery pack, the connection part between the side wall of the upper cover and the flange is the most vulnerable part to structural cracking.

[0003] In some related technologies, by unevenly setting the thickness of the flange, the stress state at the connection position between the side wall and the flange is optimized, the stress magnitude at the connection position between the flange and the side wall is reduced, and thus the risk of cracking at the connection position between the flange and the side wall is reduced. However, the above-mentioned design of gradually increasing the thickness of the flange can only be applied to small power battery packs. For large energy storage battery packs, especially the current new long battery pack structure, since only the front two bottom corners are fixed in the battery rack during transportation, large stresses will be generated at the connection part between the side wall of the upper shell and the flange. Especially, the part of the longer side of the flange near the front end of the upper cover often shows insufficient strength and structural cracking under relatively harsh transportation conditions. Therefore, relying solely on the design of gradually increasing the thickness of the flange cannot cope with the cracking risk at the connection part between the side wall of the upper cover and the flange of large energy storage battery packs.

[0004] Therefore, how to avoid cracking at the connection part between the side wall of the upper cover and the flange is a technical problem that needs to be solved urgently in this field. Summary of the Utility Model

[0005] The utility model provides an upper cover assembly and a battery pack to solve the above technical problems.

[0006] To achieve the above object, an embodiment of the utility model provides an upper cover assembly, including: an upper cover; and a flange installed at the bottom edge of the upper cover; wherein a strengthening structure is provided at at least one corner position of the flange.

[0007] Further, the strengthening structure includes a U-shaped strengthening member; wherein the U-shaped strengthening member is arranged along the length direction of the flange on the edge.

[0008] Further, the strengthening structure further includes an L-shaped strengthening member; wherein the L-shaped strengthening member is arranged along the width direction of the flange on the edge.

[0009] Further, both the U-shaped strengthening member and the L-shaped strengthening member are section steels.

[0010] Further, the widths of the U-shaped strengthening member and the L-shaped strengthening member do not exceed the width of the flange.

[0011] Further, the orifice reinforcing member abuts against the L-shaped reinforcing member at the corner and is fixed by welding; wherein the L-shaped reinforcing member shields approximately 1 / 2 of the opening area of the orifice reinforcing member.

[0012] Further, the flange is provided with equally spaced assembly holes.

[0013] Further, the orifice reinforcing member and the L-shaped reinforcing member are both provided with calibration holes corresponding to the assembly holes.

[0014] Further, the reinforcing structure further includes a locking member; wherein the locking member is screwed into from the calibration hole and screwed out from the assembly hole.

[0015] The present utility model further provides a battery pack, including: a battery and the above-mentioned upper cover assembly; wherein the upper cover assembly is installed on the upper part of the battery pack.

[0016] Compared with the prior art, the present utility model sets a reinforcing structure in the length and width directions of the flange, enabling the reinforcing structure to support the flange and the side wall of the upper cover, improving the structural strength of the connection part between the side wall of the upper cover of the energy storage battery pack and the flange, solving the problem of structural cracking caused by stress concentration at local positions of the upper cover under severe transportation conditions of large energy storage battery packs, and also improving the stability and reliability of the installation of the battery pack and the battery rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is a partial perspective view of the upper cover assembly of the present utility model;

[0019] Figure 2 is of the present utility model Figure 1 the enlarged structural schematic diagram at A in;

[0020] Figure 3 is a perspective view of the optimal embodiment of the orifice reinforcing member of the present utility model;

[0021] Figure 4 is a perspective view of the optimal embodiment of the L-shaped reinforcing member of the present utility model.

[0022] Wherein, 1. Upper cover; 2. Flange; 21. Assembly hole; 3. Reinforcing structure; 31. Orifice reinforcing member; 32. L-shaped reinforcing member; 33. Calibration hole; 34. Locking member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will now be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0024] Please refer to Figure 1 , Figure 1 , which is a partial perspective view of the upper cover assembly of the present utility model. As Figure 1 shown, at least one embodiment provides an upper cover assembly, including: an upper cover 1; and a flange 2 installed at the bottom edge of the upper cover 1; wherein a strengthening structure 3 is provided at at least one corner position of the flange 2.

[0025] Please continue to refer to Figure 1 and in combination with Figure 2 , Figure 2 , which is a schematic enlarged view of the structure at A in the present utility model. Figure 1 As Figures 1 to 2 shown, the strengthening structure 3 includes a U-shaped strengthening member 31; it should be additionally supplemented that the length of the U-shaped strengthening member 31 is between the distances of two to three assembly holes 21, wherein the U-shaped strengthening member 31 is arranged along the length direction of the flange 2 on the edge, and the length of the U-shaped strengthening member 31 is not shorter than the length of the L-shaped strengthening member 32. The strengthening structure 3 further includes an L-shaped strengthening member 32; wherein the L-shaped strengthening member 32 is arranged along the width direction of the flange 2 on the edge. Both the U-shaped strengthening member 31 and the L-shaped strengthening member 32 are section steels. The widths of the U-shaped strengthening member 31 and the L-shaped strengthening member 32 do not exceed the width of the flange 2. The U-shaped strengthening member 31 and the L-shaped strengthening member 32 are in contact with each other at the corner and are fixed by welding; wherein the L-shaped strengthening member 32 covers about 1 / 2 of the opening area of the U-shaped strengthening member 31.

[0026] Please continue to refer to Figure 1 and in combination with Figures 3 to 4 , Figure 3 , which is a perspective view of the optimal embodiment of the U-shaped strengthening member of the present utility model; Figure 4 , which is a perspective view of the optimal embodiment of the L-shaped strengthening member of the present utility model. As Figure 1 and Figures 3 to 4 shown, the flange 2 is provided with equally spaced assembly holes 21. Both the U-shaped strengthening member 31 and the L-shaped strengthening member 32 are provided with calibration holes 33 corresponding to the assembly holes 21, and the calibration holes 33 and the assembly holes 21 are threaded holes with the same hole diameter.

[0027] Please continue to refer to Figure 2 . As Figure 2 shown, the strengthening structure 3 further includes a locking member 34; wherein the locking member 34 is screwed into the calibration hole 33 and screwed out from the assembly hole 21. The locking member 34 includes a bolt, and the bolt is rotated into the calibration hole 33 and the assembly hole 21 to achieve the effect of relatively fixing the L-shaped strengthening member 32 and the U-shaped strengthening member 31 on the flange 2.

[0028] Some embodiments also provide a battery pack, including: a battery and the above-mentioned upper cover assembly; wherein the upper cover assembly is installed on the upper part of the battery pack.

[0029] In summary, by providing the reinforcement structure 3 in the length and width directions of the flange 2, the reinforcement structure 3 supports the flange 2 and the side wall of the upper cover 1, improving the structural strength of the connection part between the side wall of the upper cover of the energy storage battery pack and the flange 2, solving the problem of structural cracking caused by stress concentration at local positions of the upper cover under severe transportation conditions of large energy storage battery packs, and also improving the stability and reliability of the installation of the battery pack and the battery rack.

[0030] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can make various changes and modifications completely within the scope not deviating from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cover assembly, characterized in that: include: Upper cover (1); and A flange (2) mounted on the bottom edge of the upper cover (1); in A reinforcement structure (3) is provided at at least one corner position of the flange (2); The reinforcement structure (3) comprises a mouth-shaped reinforcement member (31); wherein The mouth-shaped reinforcement member (31) is arranged on the edge along the length direction of the flange (2).

2. The upper cover assembly according to claim 1, characterized in that: The reinforcement structure (3) further comprises an L-shaped reinforcement member (32); wherein The L-shaped reinforcement member (32) is arranged on the edge along the width direction of the flange (2).

3. The upper cover assembly according to claim 2, characterized in that: The mouth-shaped reinforcement member (31) and the L-shaped reinforcement member (32) are both made of steel.

4. The upper cover assembly according to claim 2, characterized in that: The width of the mouth-shaped reinforcement member (31) and the L-shaped reinforcement member (32) does not exceed the width of the flange (2).

5. The upper cover assembly according to claim 2, characterized in that: The mouth-shaped reinforcement member (31) and the L-shaped reinforcement member (32) abut against each other at the corner and are fixed by welding; wherein The L-shaped reinforcement member (32) covers about 1 / 2 of the opening area of ​​the mouth-shaped reinforcement member (31).

6. The upper cover assembly according to claim 2, characterized in that: The flange (2) is provided with assembly holes (21) at equal intervals.

7. The upper cover assembly according to claim 6, characterized in that: The mouth-shaped reinforcement piece (31) and the L-shaped reinforcement piece (32) are both provided with calibration holes (33) corresponding to the assembly holes (21).

8. The upper cover assembly according to claim 7, characterized in that: The reinforcement structure (3) further comprises a locking member (34); wherein The locking member (34) is screwed into the calibration hole (33) and screwed out of the assembly hole (21).

9. A battery pack, characterized in that: include: A battery and a top cover assembly as claimed in any one of claims 1 to 8; in The upper cover assembly is installed on the upper part of the battery pack.

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