Battery pack upper cover and battery pack

Abstract

A battery pack upper cover, comprising: an upper cover body (1), the upper cover body (1) comprising a cavity structure (12) having an accommodating cavity (11), and an assembly lip plate (13) located at the edge of the cavity structure (12); and a metal plate frame (2) and / or reinforcing metal plate (3) mounted on an outer surface of the cavity structure (12), the metal plate frame (2) being provided with a metal plate lip plate (21) connected to the assembly lip plate (13), and the reinforcing metal plate (3) being provided with a second reinforcing surface (35) connected to the assembly lip plate (13). Further provided is a battery pack comprising the upper cover.

Description

Battery pack upper cover and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 31, 2024, with application number 2024202418694. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of battery packs, and in particular to a battery pack cover and a battery pack. Background Art

[0003] To achieve lightweight battery pack designs, some battery pack casings in related technologies utilize plastic or a plastic cover. "Shear resistance" generally refers to the ability of a material or structure to resist shear forces. Shear force is a force acting on an object, attempting to cause it to move relative to the object in a direction parallel to the force. Technical issues

[0004] The plastic cover has weak shear resistance and cannot guarantee mechanical reliability and safety, so it cannot meet the "shear resistance" requirements. Technical Solutions

[0005] In a first aspect, the present application provides a battery pack upper cover, comprising: an upper cover body, the upper cover body comprising a cavity structure having a accommodating cavity and an assembly lip located at the edge of the cavity structure; and a sheet metal frame and / or reinforced sheet metal installed on the outer surface of the cavity structure, the sheet metal frame being provided with a sheet metal lip connected to the assembly lip, and the reinforced sheet metal being provided with a second reinforcing surface connected to the assembly lip.

[0006] In a second aspect, the present application provides a battery pack comprising a battery shell, a cell group and a battery pack upper cover, wherein the cell group is located between the battery shell and the upper cover body, and the assembly lip of the upper cover body is connected to the battery shell. Beneficial effects

[0007] Since the material of the battery cover itself is not changed, the advantages of the flexible cover body are retained. A sheet metal frame and / or reinforced sheet metal are added without affecting the advantages of the cover body, thereby improving the shear resistance of the outer surface of the cover body and ensuring that the battery cover has sufficient strength. The sheet metal frame and / or reinforced sheet metal are easy to assemble with the cover body, and the sheet metal frame, cover body and battery shell can be assembled into one by fasteners. There is no need to add an assembly structure to the sheet metal frame, thereby greatly improving the ease of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a schematic diagram of a top view of the upper cover body of Example 1 of the present application;

[0009] FIG2 is a schematic diagram of a top view of the upper cover body of Example 2 of the present application;

[0010] FIG3 is a schematic diagram of a top view of the upper cover body of Example 3 of the present application;

[0011] FIG4 is a schematic diagram of the accommodating cavity structure of the upper cover body according to an embodiment of the present application;

[0012] FIG5 is a schematic diagram of a top view of the other side of the upper cover body of Example 3 of the present application;

[0013] FIG6 is a schematic diagram of the explosion structure of Example 3 of the present application;

[0014] FIG7 is a schematic diagram of the battery pack structure of an embodiment of the present application.

[0015] Among them, the meanings of the accompanying drawings are as follows: 1. Upper cover body; 11. Accommodating cavity; 12. Cavity structure; 121. Cavity bottom; 122. Cavity side; 123. Reinforcing beam; 13. Assembly lip plate; 2. Sheet metal frame; 21. Sheet metal lip plate; 22. Sheet metal sleeve; 221. First surface; 222. Second surface; 223. Third surface; 224. Fourth surface; 3. Reinforced sheet metal; 31. First reinforced sheet metal; 32. Second reinforced sheet metal; 33. Third reinforced sheet metal; 34. First reinforced surface; 35. Second reinforced surface; 36. Triangular rib; 37. Reinforcing rib; 4. First electrode mounting platform; 5. Second electrode mounting platform; 6. Plug-in platform; 61. Plug port; 7. Battery casing. Modes for Carrying Out the Invention

[0016] Embodiment 1 of the present application, as shown in FIG1 , discloses a battery pack upper cover, including an upper cover body 1 and a sheet metal frame 2, wherein the upper cover body 1 includes a cavity structure 12 having an accommodating cavity 11 and an assembly lip 13 located at the edge of the cavity structure 12, and the sheet metal frame 2 includes a sheet metal lip 21 and a sheet metal sleeve 22, wherein the sheet metal sleeve 22 is sleeved on the outer surface of the cavity structure 12, and the sheet metal lip 21 is connected to the assembly lip 13, and the connection method includes but is not limited to screwing, bonding or clamping. By sleeved a layer of sheet metal frame 2 on the upper cover body 1, the upper cover body 1 can better withstand shear force and reduce the risk of deformation, damage or failure.

[0017] Embodiment 2 of the present application is shown in FIG2 , in which the battery pack upper cover includes an upper cover body 1 and at least one reinforcing sheet metal 3, wherein the upper cover body 1 includes a cavity structure 12 having an accommodating cavity 11 and an assembly lip plate 13 located at the edge of the cavity structure 12, and the reinforcing sheet metal 3 includes a first reinforcing surface 34 and a second reinforcing surface 35, wherein the first reinforcing surface 34 is connected to the outer surface of one side of the cavity structure 12, and the second reinforcing surface 35 is connected to the assembly lip plate 13, and the connection method includes but is not limited to screwing, bonding or clamping. By respectively sleeved a layer of reinforcing sheet metal 3 on the side walls of the upper cover body 1, the upper cover body 1 can better withstand shear force and reduce the risk of deformation, damage or failure.

[0018] Embodiment 3 of the present application is shown in Figures 3-6. The battery pack cover includes a cover body 1, a sheet metal frame 2 and a reinforcing sheet metal 3. The cover body 1 includes a cavity structure 12 with a receiving cavity 11 and an assembly lip 13 located at the edge of the cavity structure 12. The sheet metal frame 2 includes a sheet metal lip 21 and a sheet metal sleeve 22. The sheet metal sleeve 22 is sleeved on the outer surface of the cavity structure 12. The sheet metal lip 21 is connected to the assembly lip 13. The connection method includes but is not limited to screwing, bonding or clamping. The reinforcing sheet metal 3 includes a first reinforcing surface 34 and a second reinforcing surface 35, the first reinforcement surface 34 is connected to the outer surface of the sheet metal sleeve 22, and the second reinforcement surface 35 is connected to the sheet metal lip plate 21. The connection methods include but are not limited to screwing, bonding, or clamping. Specifically, referring to Figures 3-6, the cavity structure 12 includes a cavity bottom surface 121 and a cavity side surface 122. The cavity bottom surface 121 and the cavity side surface 122 are integrally formed. The sheet metal sleeve 22 is sleeved on the cavity side surface 122, improving the shear resistance of the cavity side surface 122 without affecting the flexibility of the cavity bottom surface 121, thereby achieving internal protection. At least one side of the sheet metal sleeve 22 is provided with a reinforcement sheet metal 3 to improve the shear resistance of the sheet metal sleeve 22. In this embodiment 3, the sheet metal sleeve 22 of the cavity side 122 includes a first surface 221, a second surface 222, a third surface 223 and a fourth surface 224 that enclose the cavity side 122, and the cavity bottom surface 121 is recessed into the accommodating cavity 11 to form a first electrode mounting platform 4 and a second electrode mounting platform 5, which are respectively used to mount the positive and negative poles of the battery. The first electrode mounting platform 4 and the second electrode mounting platform 5 are located at the two corners of the cavity side 122, so the first surface 221 of the sheet metal sleeve 22 is in a "convex" shape, and the recesses on both sides of the first surface 221 correspond to the first electrode mounting platform 4 and the second electrode mounting platform 5 of the cavity side 122, which can avoid the sheet metal sleeve 22 and the reinforcing sheet metal 3 from causing installation interference to the electrode installation of the first electrode mounting platform 4 and the second electrode mounting platform 5. The first surface 221 corresponds to A first reinforcing sheet metal 31 in the shape of a "convex" character is provided; the second surface 222 of the sheet metal sleeve 22 is L-shaped, and the recessed part of the second surface 222 corresponds to the second electrode mounting platform 5 on the side surface 122 of the cavity, and the second surface 222 is correspondingly provided with an L-shaped second reinforcing sheet metal 32; the third surface 223 of the sheet metal sleeve 22 is rectangular, and the third surface 223 is correspondingly provided with a rectangular third reinforcing sheet metal 33; the fourth surface 224 of the sheet metal sleeve 22 is rectangular, and the side surface 122 of the cavity corresponding to the fourth surface 224 is provided with a plug-in platform 6, and the plug-in platform 6 is provided with a plug-in interface 61. Therefore, in order to make the fourth surface 224 of the sheet metal sleeve 22 avoid the plug-in platform 6, the area of ​​the fourth surface 224 is smaller than the area of ​​the third surface 223, so as to avoid interference of the sheet metal sleeve 22 and the reinforcing sheet metal 3 with the plug-in operation of the plug-in platform 6.

[0019] It should be noted that, in Examples 1 and 2, the sheet metal sleeve 22 and the reinforcing sheet metal 3 also need to avoid the plug-in platform 6 and the first electrode mounting platform 4 and the second electrode mounting platform 5 .

[0020] In Examples 2 and 3, referring to Figures 2 and 3, to improve the fit between the reinforcing sheet metal 3 and the sheet metal sleeve 22 and the sheet metal lip 21, in some embodiments, the reinforcing sheet metal 3 is produced as an integral bending molding, so that the first reinforcing surface 34 is in contact with the outer wall of the sheet metal sleeve 22, and the second reinforcing surface 35 is in contact with the outer wall of the sheet metal lip 21. This reduces the production complexity of the reinforcing sheet metal 3 and enables a perfect fit with the sheet metal sleeve 22 and the sheet metal lip 21. In Example 1, in some embodiments, the sheet metal lip 21 and the sheet metal sleeve 22 can also be designed to be integrally injection molded.

[0021] In Examples 2 and 3, referring to Figures 2 and 3, to improve the bending stability between the first reinforcing surface 34 and the second reinforcing surface 35, in some embodiments, triangular ribs 36 are provided between the first reinforcing surface 34 and the second reinforcing surface 35 of the first reinforcing sheet metal 31, the second reinforcing sheet metal 32, and the third reinforcing sheet metal 33. This improves the assembly strength of the assembly lip 13 and provides a certain degree of shear resistance. In Example 1, in some embodiments, triangular ribs 36 may also be provided between the sheet metal lip 21 and the sheet metal sleeve 22 to similarly improve the assembly strength of the assembly lip 13 and provide a certain degree of shear resistance.

[0022] In Examples 2 and 3, as shown in Figures 2, 3, and 6, the shear resistance of the first reinforcing surface 34 can be improved by providing transverse and / or longitudinal reinforcing ribs 37 on the first reinforcing surface 34. In this Example 3, transverse reinforcing ribs 37 are provided on both sides of the first reinforcing sheet metal 31 corresponding to the first electrode mounting platform 4 and the second electrode mounting platform 5, and a longitudinal reinforcing rib 37 is provided in the center of the first reinforcing sheet metal 31. In the second reinforcing sheet metal 3, transverse reinforcing ribs 37 are provided on the portion corresponding to the second electrode mounting platform 5, and longitudinal reinforcing ribs 37 are provided on the remaining portion. Longitudinal reinforcing ribs 37 are provided on the third reinforcing sheet metal 33. It should be noted that the number of reinforcing ribs 37 is not specifically limited in this Example 3 and can be determined based on the actual area of ​​the reinforcing sheet metal 3. Similarly, the reinforcing ribs 37 include, but are not limited to, outwardly convex ribs and inwardly concave groove ribs, and can be modified according to the actual requirements of the cover body 1. Similarly, in Example 1, transverse and / or longitudinal reinforcing ribs 37 may also be provided on the sheet metal sleeve 22 to improve its own strength.

[0023] Referring to FIG. 4 , in some embodiments, in Examples 1-3, transverse, longitudinal, or crisscrossed reinforcing beams 123 may be provided on the cavity bottom 121. This allows the cavity bottom 121 of the upper cover body 1 to have a certain degree of inherent strength, preventing it from easily collapsing under stress. Reinforcing diagonal ribs are provided between the ends of the reinforcing beams 123 and the cavity side surfaces 122, enhancing the connection stability between the cavity bottom 121 and the cavity side surfaces 122 of the upper cover body 1, providing a certain degree of support and preventing easy collapse. In other embodiments, the specific structure of the green grape bottom surface is not limited and may be modified according to the structure of different batteries.

[0024] Referring to Figures 3 and 7, the present application also relates to a battery pack, comprising a battery shell 7, a battery cell group and any one of the battery pack covers of Examples 1-3, wherein the battery cell group is located between the battery shell 7 and the cover body 1, and the assembly lip 13 of the cover body 1 is connected to the battery shell 7, which can improve the shear resistance of the top of the battery pack, while meeting the insulation and corrosion protection of the battery pack, and is easy to install, has the advantages of being lightweight and portable, and has a flexible design and low cost.

[0025] It should be noted that battery packs include conventional main battery packs for power storage and starting battery packs. The starting battery pack is a type of battery pack, typically specifically designed for starting a vehicle. This battery pack typically has a high starting current and capacity to provide sufficient power for starting the vehicle. The starting battery pack is typically separate from the vehicle's main battery pack so that it stops functioning after the vehicle is started, saving energy. This type of battery pack is more commonly used with a soft or plastic top cover. Therefore, all of the structures described in Examples 1-3, in addition to being applied to some main battery pack top covers made of plastic or plastic, can also be migrated and applied to the starting battery pack top cover, thereby achieving a protective effect on the starting battery pack top cover.

[0026] To sum up, the battery pack cover and battery pack provided by the present application have the following technical effects: since the material of the battery cover itself is not changed, the advantages of the flexible cover body 1 are retained, and the sheet metal frame 2 is added without affecting the advantages of the cover body 1, thereby improving the shear resistance of the outer surface of the cover body 1 and ensuring that the battery cover has sufficient strength. The sheet metal frame 2 and the cover body 1 are easy to assemble, and the sheet metal frame 2, the cover body 1 and the battery shell 7 can be assembled into one by the same fasteners, without adding an assembly structure to the sheet metal frame 2, thereby greatly improving the ease of assembly.

Claims

1. A battery pack cover, comprising: An upper cover body (1), comprising a cavity structure (12) having a receiving cavity (11) and an assembly lip plate (13) located at an edge of the cavity structure (12); and A sheet metal frame (2) and / or a reinforcing sheet metal (3) are mounted on the outer surface of the cavity structure (12); the sheet metal frame (2) is provided with a sheet metal lip plate (21) connected to the assembly lip plate (13); and the reinforcing sheet metal (3) is provided with a second reinforcing surface (35) connected to the assembly lip plate (13).

2. A battery pack cover according to claim 1, wherein: The cavity structure (12) includes a cavity bottom surface (121) and a cavity side surface (122); The sheet metal frame (2) comprises a sheet metal sleeve (22), the sheet metal sleeve (22) is integrally connected to the sheet metal lip plate (21), and the sheet metal sleeve (22) abuts against the side surface (122) of the cavity; and / or, The reinforced sheet metal (3) includes a first reinforced surface (34), the first reinforced surface (34) is integrally connected to a second reinforced surface (35), and the first reinforced surface (34) abuts against the side surface (122) of the cavity or the outer surface of the sheet metal sleeve (22).

3. A battery pack cover according to claim 2, wherein: The outer surface of the cavity structure (12) is provided with at least one reinforcing sheet metal (3), and / or the outer surface of the sheet metal sleeve (22) is provided with at least one reinforcing sheet metal (3).

4. A battery pack cover according to claim 2, wherein: A triangular rib (36) is provided between the sheet metal sleeve (22) and the sheet metal lip plate (21), and / or a triangular rib (36) is provided between the first reinforcement surface (34) and the second reinforcement surface (35).

5. The battery pack cover according to claim 2, wherein: The sheet metal sleeve (22) is provided with transverse and / or longitudinal reinforcing ribs (37), and / or the first reinforcing surface (34) is provided with transverse and / or longitudinal reinforcing ribs (37).

6. A battery pack cover according to claim 2, wherein: The sheet metal sleeve (22) of the sheet metal frame (2) is sleeved on the outer surface of the cavity structure (12), and the first reinforcement surface (34) of the reinforced sheet metal (3) is arranged on the outer surface of the sheet metal sleeve (22).

7. A battery pack cover according to any one of claims 2 to 6, wherein: The bottom surface (121) of the cavity is recessed into the accommodating cavity (11) to form a first electrode mounting platform (4) and a second electrode mounting platform (5); the sheet metal sleeve (22) and / or the reinforcing sheet metal (3) are arranged to avoid the first electrode mounting platform (4) and the second electrode mounting platform (5).

8. A battery pack cover according to any one of claims 2 to 6, wherein: The cavity side surface (122) is further provided with a plug-in platform (6), the plug-in platform (6) is provided with a plug-in interface (61), and the sheet metal sleeve (22) and / or the reinforced sheet metal (3) are arranged to avoid the plug-in platform (6).

9. [Corrected 11.09.2024 according to Rule 26] A battery pack cover according to any one of claims 2 to 6, wherein: The cavity bottom surface (121) and the cavity side surface (122) are integrally formed, and the cavity bottom surface (121) is provided with transverse, longitudinal or transverse and longitudinal staggered reinforcement beams (123).

10. A battery pack cover according to claim 9, wherein: Reinforcing diagonal ribs are provided between the end of the reinforcing beam (123) and the side surface (122) of the cavity.

11. A battery pack comprising a battery housing (7), a battery cell group and a battery pack cover according to any one of claims 1 to 10, wherein the battery cell group is located between the battery housing (7) and the cover body (1), and the assembly lip (13) of the cover body (1) is connected to the battery housing (7).

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