Battery pack cover and battery pack

Abstract

A battery pack cover, characterized in that it comprises: a cover body (1) comprising a cavity structure (12) and a mounting lip (13); wherein the cavity structure (12) has a receiving space (11), and the mounting lip (13) is arranged on an edge of the cavity structure (12); and a sheet metal frame (2) and / or a reinforcing sheet (3) arranged on an outer surface of the cavity structure (12); wherein the sheet metal frame (2) comprises a sheet metal lip plate (21) connected to the mounting lip plate (13); the reinforcing sheet (3) comprises a second reinforcing surface (35) connected to the mounting lip plate (13).

Description

[0001] This application claims priority to the Chinese patent application filed on January 31, 2024, with the China National Intellectual Property Administration (CNIPA) under application number 202420241869.4, the entire contents of which are incorporated by reference into this application. Technical field

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

[0003] To achieve a lightweight battery pack design, relevant technologies utilize thermoplastic or plastic covers in some battery pack enclosures. "Shear strength" generally refers to the resistance of a material or structure when subjected to a shear force. Shear force is a force acting on an object that attempts to cause relative displacement along a direction parallel to the direction of the force. Contents of this applicationTechnical problems

[0004] The shear strength of the top thermoplastic cover is weak and cannot ensure mechanical reliability and safety, so it cannot meet the “shear strength” requirement. Technical solution

[0005] First, the present application discloses a battery pack cover comprising: a cover body including a cavity structure and a mounting lip, wherein the cavity structure has a receiving space, and the mounting lip is disposed at an edge of the cavity structure; and a sheet metal frame and / or a reinforcing sheet disposed on an outer surface of the cavity structure; wherein the sheet metal frame includes a sheet metal lip plate connected to the mounting lip plate; the reinforcing sheet includes a second reinforcing surface connected to the mounting lip plate.

[0006] Second, the present application discloses a battery pack comprising a battery case, a cell group, and a battery pack cover; wherein the cell group is arranged between the battery case and the cover body, and the mounting lip plate of the cover body is connected to the battery case. Beneficial effect

[0007] Since the material of the battery pack cover itself has not been changed, the advantages of the flexible top cover body are retained. A sheet metal frame and / or reinforcement plate are added without compromising the advantages of the top cover body, thereby improving the shear strength of the outer surface of the top cover body and ensuring that the battery pack cover has sufficient strength. The sheet metal frame and / or reinforcement plate are easily assembled with the top cover body. The sheet metal frame, top cover body, and battery case can be assembled as a whole with the same fasteners, without the need to add a mounting structure for the sheet metal frame, which greatly simplifies assembly. Short description of the drawing Fig. 1 is a schematic diagram of the upper structure of an upper cover body according to Embodiments 1 of the present application. Fig. 2 is a schematic diagram of the upper structure of an upper cover body according to Embodiments 2 of the present application. Fig. 3 is a schematic diagram of the upper structure of an upper cover body according to Embodiments 3 of the present application. Fig. 4 is a structural schematic diagram of a receiving space of an upper cover body according to some embodiments of the present application. Fig. 5 is another schematic diagram of the upper structure of an upper cover body according to Embodiments 3 of the present application. Fig. 6 is a schematic exploded diagram according to Embodiments 3 of the present application. Fig. 7 is a structural schematic diagram of a battery pack according to some embodiments of the present application.

[0008] In the drawings: 1, upper cover body; 11, receiving space; 12, cavity structure; 121, cavity bottom; 122, cavity side surface; 123, reinforcing beam; 13, mounting 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, reinforcing sheet; 31, first reinforcing sheet; 32, second reinforcing sheet; 33, third reinforcing sheet; 34, first reinforcing surface; 35, second reinforcing surface; 36, triangular rib; 37, reinforcing rib; 4, first electrode mounting platform; 5, second electrode mounting platform; 6, plug-in platform; 61, plug-in interface; 7, battery case. Detailed description of the embodiments

[0009] Embodiment 1 of the present application is in Fig. 1, which discloses a battery pack cover comprising a cover body 1 and a sheet metal frame 2; wherein the cover body 1 comprises a cavity structure 12 and a mounting lip 13, the cavity structure 12 has a receiving space 11, and the mounting lip 13 is arranged on an edge of the cavity structure 12; the sheet metal frame 2 comprises a sheet metal lip plate 21 and a sheet metal sleeve 22, wherein the sheet metal sleeve 22 is pushed onto an outer surface of the cavity structure 12; the sheet metal lip plate 21 is connected to the mounting lip plate 13, and the connection method includes, but is not limited to, screwing, gluing, or snapping. By overlaying a sheet metal frame 2 on the upper cover body 1, the upper cover body 1 can better withstand shear forces, thereby reducing the risk of deformation, damage, or failure.

[0010] Embodiment 2 of the present application is in Fig. 2. The battery pack cover comprises an upper cover body 1 and at least one reinforcement plate 3. The upper cover body 1 comprises a cavity structure 12 and a mounting lip 13, wherein the cavity structure 12 has a receiving space 11, and the mounting lip 13 is arranged on an edge of the cavity structure 12. The reinforcement plate 3 comprises a first reinforcement surface 34 and a second reinforcement surface 35, and the first reinforcement surface 34 is connected to an outer surface of one of the sides of the cavity structure 12. The second reinforcement surface 35 is connected to the mounting lip plate 13, and the connection method includes, but is not limited to, screwing, gluing, or snapping.By superimposing a layer of reinforcing sheet 3 on the side wall of the upper cover body 1, the upper cover body 1 can better withstand shear forces, thereby reducing the risk of deformation, damage or failure.

[0011] Embodiment 3 of the present application is described in Fig. 3-6. The battery pack cover comprises an upper cover body 1, a sheet metal frame 2, and a reinforcement sheet 3. The upper cover body 1 comprises a cavity structure 12 and a mounting lip 13, wherein the cavity structure 12 has a receiving space 11, and the mounting lip 13 is arranged on an edge of the cavity structure 12. The sheet metal frame 2 comprises a sheet metal lip plate 21 and a sheet metal sleeve 22, wherein the sheet metal sleeve 22 is pushed onto an outer surface of the cavity structure 12; the sheet metal lip plate 21 is connected to the mounting lip plate 13, and the connection method includes, but is not limited to, screwing, gluing, or snapping. The reinforcement sheet 3 comprises a first reinforcement surface 34 and a second reinforcement 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 method includes, but is not limited to, screwing, gluing, or snapping. As described in the . Fig. 3-6, the cavity structure 12 comprises a cavity bottom 121 and a cavity side surface 122, wherein the cavity bottom 121 and the cavity side surface 122 are integrally formed, and the sheet metal sleeve 22 is connected to the cavity side surface 122, thereby improving the shear strength of the cavity side surface 122 without compromising the flexible properties of the cavity bottom 121, thereby achieving an internal protective effect. At least one side of the sheet metal sleeve 22 is provided with the reinforcing sheet 3 to improve the shear strength of the sheet metal sleeve 22.In this embodiment 3, the sheet metal shell 22 of the cavity side surface 122 includes a first surface 221, a second surface 222, a third surface 223, and a fourth surface 224 that surround the cavity side surface 122, and the cavity bottom 121 is formed with a first electrode mounting platform 4 and a second electrode mounting platform 5 that are recessed toward the receiving space 11 and respectively serve to fix the positive and negative electrodes 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 wall 122. Therefore, the first surface 221 of the sheet metal shell 22 forms a ". " 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 on the cavity side surface 122, whereby the sheet metal sleeve 22 and the reinforcing sheet 3 can be prevented from interfering with the mounting of the electrodes of the first electrode mounting platform 4 and the second electrode mounting platform 5. The first surface 221 is provided with a first reinforcing sheet 31 having a " ” shape; the second surface 222 of the sheet metal sleeve 22 is L-shaped, the recess on the second surface 222 corresponds to the second electrode mounting platform 5 on the cavity side surface 122, and the second surface 222 is provided with an L-shaped second reinforcing plate 32; the third surface 223 of the sheet metal sleeve 22 is rectangular, and the third surface 223 is provided with a corresponding rectangular third reinforcing plate 33; the fourth surface 224 of the sheet metal sleeve 22 is rectangular, and the cavity side surface 122 corresponding to the fourth surface 224 is provided with an insertion platform 6; the insertion platform 6 is provided with an insertion interface 61;in order to bypass the fourth surface 224 of the sheet metal sleeve 22, the plug-in platform 6, the area of the fourth surface 224 is smaller than the area of the third surface 223, so that interference between the sheet metal sleeve 22 and the reinforcing plate 3 is avoided during the plug-in process of the plug of the plug-in platform 6;

[0012] It should be noted that in Embodiments 1 and 2, the sheet metal sleeve 22 and the reinforcing sheet 3 must also avoid the insertion platform 6 and the first electrode mounting platform 4 and the second electrode mounting platform 5.

[0013] In embodiments 2 and 3, as shown in the Fig. 2 and Fig. 3, in some embodiments, the reinforcement plate 3 is formed by a single bend to improve the fit of the reinforcement plate 3 with the sheet metal sleeve 22 and the sheet metal lip plate 21, so that the first reinforcement surface 34 is in contact with the outer wall of the sheet metal sleeve 22, the second reinforcement surface 35 is in contact with the outer wall of the sheet metal lip plate 21, thereby reducing the complexity of manufacturing the reinforcement plate 3 and allowing it to be perfectly adapted to the sheet metal sleeve 22 and the sheet metal lip plate 21. In Embodiment 1, in some embodiments, the sheet metal lip plate 21 and the sheet metal sleeve 22 can be implemented as a one-piece injection-molded part.

[0014] In embodiments 2 and 3, as shown in the Fig. 2 and Fig. 3, in order to improve the bending stability between the first reinforcing surface 34 and the second reinforcing surface 35, in some embodiments, a triangular rib 36 is arranged between the first reinforcing surface 34 and the second reinforcing surface 35 in the first reinforcing sheet 31, the second reinforcing sheet 32, and the third reinforcing sheet 33, whereby the assembly strength of the mounting lip plate 13 can be improved and has a certain shear strength. In Embodiment 1, in some embodiments, a triangular rib 36 can be arranged between the sheet metal lip plate 21 and the sheet metal sleeve 22, whereby the assembly strength of the mounting lip plate 13 can also be improved and it has a certain shear strength.

[0015] In embodiments 2 and 3, as shown in the Fig. 2, Fig. 3, and Fig. 6, the shear strength of the first reinforcing surface 34 can be further improved by disposing transverse and / or longitudinal reinforcing ribs 37 on the first reinforcing surface 34. In this embodiment 3, transverse reinforcing ribs 37 are disposed on both sides of the first reinforcing plate 31 corresponding to the first electrode mounting platform 4 and the second electrode mounting platform 5, and longitudinal reinforcing ribs 37 are disposed in the center of the first reinforcing plate 31. In the second reinforcing plate 3, a part corresponding to the second electrode mounting platform 5 is provided with transverse reinforcing ribs 37, and the remaining part is provided with longitudinal reinforcing ribs 37. The longitudinal reinforcing ribs 37 are disposed on the third reinforcing plate 33.Note that the number of reinforcing ribs 37 in this Embodiment 3 is not specifically limited and can be determined according to the actual area of the reinforcing plate 3. Likewise, the reinforcing ribs 37 include, but are not limited to, convex ribs that bulge outward and grooved ribs that bulge inward, and can be changed according to the requirements of the actual cover body 1. Similarly, in Embodiment 1, transverse and / or longitudinal reinforcing ribs 37 can also be arranged on the plate shell 22 to enhance its inherent strength.

[0016] As in Fig. 4, in some embodiments, in Embodiments 1-3, transversely, longitudinally, or crosswise arranged reinforcing beams 123 may be arranged. This can provide a certain degree of inherent strength to the cavity bottom 121 of the upper cover body 1, so that it will not easily collapse under load. A reinforcing diagonal rib is arranged between one end of the reinforcing beam 123 and the cavity side surface 122, which can improve the stability of the connection between the cavity bottom 121 of the upper cover body 1 and the cavity side surface 122, provide some support, and prevent easy collapse. In other embodiments, the specific structure of the cavity bottom is not limited and can be changed according to the structure of different batteries.

[0017] As in the Fig. 3 and Fig.7, the present application further relates to a battery pack comprising a battery case 7, a cell group, and one of the battery pack covers of Embodiments 1-3; wherein the cell group is located between the battery case 7 and the upper cover body 1; the mounting lip plate 13 of the upper cover body 1 is connected to the battery case 7, which can improve the shear strength of the top surface of the battery pack while ensuring the insulation and corrosion protection of the battery pack, and which is easy to install, has the advantages of light weight and portability, and has a flexible design and low cost.

[0018] It should be noted that the battery pack includes a main battery pack for normal power storage and a starter battery pack. The starter battery pack is a type of battery pack and generally refers to a battery pack specifically used for starting a car. This battery pack generally has a high starting current and high capacity to provide sufficient power when starting the car. The starter battery pack is usually separated from the car's main battery pack, so it stops working after the car is started to save energy. This type of battery pack is more often covered with a soft cover or a thermoplastic cover.Therefore, all the structures in Embodiments 1-3 can be further transferred and applied to the top cover of the starter battery pack, in addition to being applied to some main battery packs having thermoplastic or plastic covers, to achieve the protective effect on the top cover of the starter battery pack.

[0019] In summary, the battery pack cover and battery pack in the present application have the following technical effects: Since the material of the battery pack cover itself is not changed, the advantages of the flexible upper cover body 1 are retained, and a sheet metal frame 2 is added without affecting the advantages of the upper cover body 1, thereby improving the shear strength of the outer surface of the upper cover body 1 and ensuring that the battery pack cover has sufficient strength. The sheet metal frame 2 is easily assembled with the upper cover body 1. The sheet metal frame 2, the upper cover body 1, and the battery case 7 can be assembled as a whole with the same fasteners without the need to add a mounting structure for the sheet metal frame 2, which greatly simplifies assembly. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 202420241869.4

[0001]

Claims

[1] A battery pack cover, characterized by that it includes: a cover body (1) comprising a cavity structure (12) and a mounting lip (13); wherein the cavity structure (12) has a receiving space (11), and the mounting lip (13) is arranged on an edge of the cavity structure (12); and a sheet metal frame (2) and / or a reinforcing sheet (3) arranged on an outer surface of the cavity structure (12); wherein the sheet metal frame (2) comprises a sheet metal lip plate (21) connected to the mounting lip plate (13); the reinforcing sheet (3) comprises a second reinforcing surface (35) connected to the mounting lip plate (13). [2] The battery pack cover according to claim 1, wherein the cavity structure (12) comprises a cavity bottom (121) and a cavity side surface (122); the sheet metal frame (2) comprises a sheet metal sleeve (22) which is integrally connected to the sheet metal lip plate (21), and the sheet metal sleeve (22) bears against the cavity side surface (122); and / or the reinforcing sheet (3) comprises a first reinforcing surface (34); wherein the first reinforcing surface (34) is integrally connected to the second reinforcing surface (35), and the first reinforcing surface (34) bears against the cavity side surface (122) or an outer surface of the sheet metal sleeve (22). [3] Battery pack cover according to claim 2, wherein the outer surface of the cavity structure (12) is provided with at least one other reinforcing sheet (3), and / or the outer surface of the sheet metal sleeve (22) is provided with at least one other reinforcing sheet (3). [4] Battery pack cover according to claim 2, wherein a triangular rib (36) is arranged between the sheet metal sleeve (22) and the sheet metal lip plate (21), and / or a triangular rib (36) is arranged between the first reinforcing surface (34) and the second reinforcing surface (35). [5] Battery pack cover according to claim 2, wherein the sheet metal sleeve (22) is provided with transverse and / or longitudinal stiffening ribs (37), and / or the first reinforcing surface (34) is provided with transverse and / or longitudinal stiffening ribs (37). [6] Battery pack cover according to claim 2, wherein the sheet metal sleeve (22) of the sheet metal frame (2) is pushed onto the outer surface of the cavity structure (12), and the first reinforcing surface (34) of the reinforcing sheet (3) is arranged on the outer surface of the sheet metal sleeve (22). [7] Battery pack cover according to one of claims 2 to 6, wherein the cavity bottom (121) is formed with a first electrode mounting platform (4) and a second electrode mounting platform (5) which are recessed towards the receiving space (11), and the sheet metal sleeve (22) and / or the reinforcing sheet (3) is arranged so as to avoid the first electrode mounting platform (4) and the second electrode mounting platform (5). [8] The battery pack cover according to any one of claims 2 to 6, wherein the cavity side surface (122) is provided with an insertion platform (6), and the insertion platform (6) is provided with an insertion interface (61); the sheet metal sleeve (22) and / or the reinforcing sheet (3) is arranged so as to avoid the insertion platform (6). [9] Battery pack cover according to one of claims 2 to 6, wherein the cavity bottom (121) and the cavity side surface (122) are integrally formed, and the cavity bottom (121) is provided with transversely, longitudinally, or crosswise reinforcing bars (123). [10] The battery pack cover according to claim 9, wherein a reinforcing diagonal rib is disposed between one end of the reinforcing beam (123) and the cavity side surface (122). [11] A battery pack comprising a battery case (7), a cell group, and a battery pack cover according to any one of claims 1-10; wherein the cell group is arranged between the battery case (7) and the cover body (1), and the mounting lip plate (13) of the cover body (1) is connected to the battery case (7).

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