Top cover assembly, battery pack, and energy storage device

Abstract

This utility model provides a top cover assembly, a battery pack, and an energy storage device. The top cover assembly is used in the battery pack, which includes an electrical panel. The top cover assembly includes: a top cover with a clearance hole for exposing at least a portion of the electrical panel; and a bracket installed on the outside of the top cover, with at least a portion of the bracket disposed around the clearance hole. This structure, by additionally providing a bracket around the clearance hole on the outside of the top cover, ensures the strength of the top cover, eliminates the need for an internal bracket in the battery pack, improves the internal space utilization of the battery pack, reduces the risk of battery pack airtightness failure and top cover cracking, and also lowers the cost.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to a top cover assembly, a battery pack, and an energy storage device. Background Technology

[0002] With the development of new energy technologies, battery packs are increasingly being used in various devices. In these designs, battery packs typically consist of various electrical components and sockets mounted on a single electrical panel, which is then attached to the top cover of the battery pack. This structure makes the top cover prone to cracking and deformation, thus affecting the airtightness of the battery pack.

[0003] Therefore, designing a battery pack whose top cover is not easily cracked or deformed has become an urgent problem to be solved. Utility Model Content

[0004] This application aims to at least address the problem of the battery pack cover being prone to cracking and deformation in existing or related technologies.

[0005] Therefore, the first aspect of this application is to propose a cover assembly.

[0006] The second aspect of this application is to propose a battery pack.

[0007] The third aspect of this application is to propose an energy storage device.

[0008] An embodiment of the first aspect of this application provides a top cover assembly for a battery pack, the battery pack including an electrical panel, the top cover assembly including: a top cover having a clearance hole for exposing at least a portion of the electrical panel; and a bracket mounted on the outside of the top cover, with at least a portion of the bracket disposed around the clearance hole.

[0009] The top cover assembly provided according to embodiments of this application is used for a battery pack, which can be used in energy storage devices, such as inverters. The battery pack includes a top cover and an electrical panel. At least a portion of the electrical panel is located inside the battery pack. The top cover assembly constitutes at least a portion of the battery pack's outer shell. A clearance hole is provided on the top cover, and at least a portion of the electrical panel is mounted on the inner side of the top cover, allowing it to be exposed through the clearance hole for convenient wiring and other operations. A bracket is installed on the outer side of the top cover to support it and improve its strength. This structure, with the additional bracket on the outer side of the top cover around the clearance hole, ensures the strength of the top cover, eliminates the need for an internal bracket in the battery pack, improves the internal space utilization of the battery pack, reduces the risk of battery pack airtightness failure and top cover cracking, and also lowers the cost. Specifically, the bracket attached to the top cover enhances the structural strength of the mounting area. This allows for the removal of the internal support structure of the battery pack, ensuring the electrical panel can be securely installed on the top cover while preventing deformation of the top cover and avoiding airtightness failure of the battery pack. Furthermore, since the internal support structure of the battery pack is removed, the top cover loses its horizontal tensile force, preventing stress concentration at the corners of the battery pack and significantly reducing the risk of cracking.

[0010] The phrase "at least part of the bracket is located around the clearance hole" means that at least part of the bracket is located close to the clearance hole, or that part of the bracket is located around the clearance hole.

[0011] Optionally, the battery pack includes a base and an openable top cover, which together form a receiving cavity to accommodate structures such as battery cells. The top cover allows the battery to be opened or closed for easy access to the internal components of the battery pack for maintenance and other operations.

[0012] The electrical panel includes one or more electrical components, such as sockets and switches. Essentially, the electrical panel comprises a board and one or more electrical components mounted on it. The electrical panel is used to establish electrical connections between the battery pack and other components.

[0013] In any of the above embodiments, optionally, the cover includes a cover body and a flange connected to the edge of the cover body; the bracket includes a first support portion and a second support portion and a connecting portion connecting the first support portion and the second support portion; the first support portion is mounted on the cover body and is at least partially located around the clearance hole, and the second support portion is mounted on the flange; wherein, the clearance hole is provided on the cover body.

[0014] In this embodiment, the top cover includes a cover body and a flange located at the edge of the cover body. The flange extends along the thickness direction of the cover body (i.e., the axial direction of the clearance hole). The flange can be specifically formed by bending the edge of the cover body. The clearance hole is provided on the cover body, and the bracket is provided with a first support portion and a second support portion corresponding to the cover body and the flange. The first support portion and the second support portion are connected by a connecting portion. During installation, the first support portion is installed on the cover body and located close to the clearance hole, and the second support portion is installed on the flange of the top cover. This structure makes the shape of the bracket and the shape of the top cover more compatible, thus strengthening the strength of various parts of the top cover, thereby improving the strength of the top cover in various parts and avoiding weak points in the top cover that could lead to deformation or cracking.

[0015] In any of the above embodiments, optionally, a first mounting structure is provided on the first support portion, and a second mounting structure is provided on the second support portion.

[0016] In this embodiment, to facilitate the installation of the first and second support portions with the top cover, a first mounting structure is provided on the first support portion, and a second mounting structure is provided on the second support portion. During installation, the first and second support portions can be installed with the top cover using screws or snap-fit ​​mechanisms.

[0017] In any of the above embodiments, optionally, at least a portion of the electrical panel is located inside the upper cover, and the portion of the electrical panel located inside the upper cover, the first support portion, and the cover body are connected by a first threaded connector. The first support portion is provided with a first mounting hole adapted to the first threaded connector, the cover body is provided with a second mounting hole adapted to the first threaded connector, and the electrical panel is provided with a fifth mounting hole adapted to the first threaded connector. The second support portion is fixed to the flange by the second threaded connector, the second support portion is provided with a third mounting hole adapted to the second threaded connector, and the flange is provided with a fourth mounting hole adapted to the second threaded connector.

[0018] In this embodiment, both the first support and the second support are fixedly mounted to the top cover via threaded connectors (specifically, the first threaded connector and the second threaded connector). To facilitate the installation of the threaded connectors, the first support has a first mounting hole adapted to the first threaded connector, the cover has a second mounting hole adapted to the first threaded connector, the electrical panel has a fifth mounting hole adapted to the second threaded connector, the second support has a third mounting hole adapted to the second threaded connector, and the flange has a fourth mounting hole adapted to the second threaded connector. This structure allows for quick installation of the bracket, top cover, and electrical panel via threaded connectors, thereby improving the ease of battery pack installation and simplifying the overall battery pack structure.

[0019] For example, the first threaded connector and / or the second threaded connector includes hexagonal flange bolts. The nominal diameter of the hexagonal flange bolts can range from 4 mm to 6 mm.

[0020] In any of the above embodiments, the connecting portion may optionally be arc-shaped.

[0021] In this embodiment, the first support and the second support are connected in an arc shape, that is, the connection between the two is arc-shaped. This makes the transition between the first support and the second support smoother and avoids the formation of right-angle bends at the connection. This eliminates the stress concentration points of traditional right-angle bends and improves the overall fatigue strength of the bracket.

[0022] In any of the above embodiments, optionally, the first support portion and the second support portion are arranged at a first angle, wherein the first angle is greater than or equal to 85° and less than or equal to 95°, and / or the cover and the flange are arranged at a second angle, wherein the first angle and the second angle are equal.

[0023] In this embodiment, a first angle α is formed between the first support portion and the second support portion. The first angle α can specifically be 85°-95°. Furthermore, the size of the first angle can be reasonably set based on the included angle (second angle β) between the top of the cover and the flange, so that the shape of the cover and the shape of the bracket can be matched. This can improve the fit between the two after the bracket is installed on the cover, making the appearance of the battery pack more harmonious and aesthetically pleasing after the bracket is installed on the cover.

[0024] In any of the above embodiments, optionally, a first support portion surrounds at least a portion of the periphery of the clearance hole. The first support portion covers at least one-third of the perimeter of the clearance hole.

[0025] In this embodiment, a first support portion is disposed around at least a portion of the periphery of the clearance hole, thereby allowing the first support portion to extend along at least a portion of the periphery of the electrical panel. The extension length of the first support portion can be slightly longer; for example, based on the perimeter of the clearance hole, the first support portion can cover at least one-third of the perimeter of the clearance hole, thus giving the first support portion a longer extension length. This allows the first support portion to provide better support for the top cover, improving the strength of the top cover.

[0026] When the clearance hole is a circular hole, the central angle corresponding to the arc segment covered by the first support part is 90° to 360°.

[0027] In any of the above embodiments, optionally, the clearance hole is a polygonal hole, and the first support portion covers at least two sides of the polygonal hole; and / or the outline of the first support portion is adapted to the outline of the portion of the clearance hole covered by the first support portion.

[0028] In this embodiment, the clearance hole can be configured as a circle, polygon, or oblong shape. When the clearance hole is polygonal, the first support portion surrounds at least two sides of the polygonal hole, thereby giving the first support portion a longer extension length. This allows the first support portion to better support the top cover and improve the strength of the top cover. The outline of the first support portion matches the outline of the portion of the clearance hole covered by the first support portion; that is, the outline of the first support portion is conformally set based on the clearance hole. This makes the overall shape of the battery pack more aesthetically pleasing after the bracket is installed on the top cover.

[0029] For example, the clearance hole is a square hole or a rectangular hole, and the first support covers three sides of the square hole or rectangular hole, thereby forming a U-shaped structure.

[0030] In any of the above embodiments, optionally, the width of the first support portion is greater than or equal to 15 mm from the edge of the clearance hole to the center.

[0031] In this embodiment, since mounting holes and other mounting structures need to be provided on the first support part to achieve fixed installation between the first support part and the top cover, the width of the first support part cannot be too narrow, otherwise the strength of the first support part cannot be ensured. For example, the width of the first support part can be set to be greater than 15mm.

[0032] Optionally, the width of the first support is less than 100mm, for example, it can be 20mm-50mm.

[0033] In any of the above embodiments, optionally, the size of the second support portion is the same as the size of the flange along the width direction of the flange, and / or the shape of the second support portion is the same as the shape of the flange.

[0034] In this embodiment, the width and length of the second support portion are the same as the width and length of the flange, and their shapes are also basically the same. This makes the appearance of the battery pack more harmonious and aesthetically pleasing after the top cover and bracket are installed.

[0035] In any of the above embodiments, optionally, the width of the second support portion is greater than or equal to 15 mm. The width of the second support portion can be adaptively set according to the flange of the upper cover. For example, the width of the second support portion can be greater than 15 mm, which can ensure the connection strength between the second support portion and the upper cover.

[0036] Optionally, the width of the second support is less than 100mm, for example, it can be 20mm-50mm.

[0037] In any of the above embodiments, the support may optionally be an integral structure.

[0038] In this embodiment, the support is a one-piece structure, meaning it is a single unit. For example, when the support includes a first support portion, a second support portion, and a connecting portion, these components are integrated into a single structure. This improves the overall strength of the support and facilitates its integral fabrication.

[0039] In any of the above embodiments, the support may optionally be a metal support.

[0040] In this embodiment, the support is a metal support, which can improve the strength of the support and prevent the support from deforming.

[0041] In any of the above embodiments, the top cover may optionally be a plastic cover. This can reduce the cost of the top cover, and since the top cover is mostly made of plastic in the relevant solutions, the battery pack can reuse the original top cover, thereby reducing the cost of battery pack upgrades and replacements, which is conducive to the promotion and implementation of the improved battery pack.

[0042] Alternatively, the top cover can also be a metal cover.

[0043] In any of the above embodiments, optionally, the thickness of the support is greater than or equal to 1 mm and less than or equal to 3 mm.

[0044] In this embodiment, the thickness of the support needs to be designed to balance both its strength and cost. Taking all factors into account, the thickness of the support can be set between 1mm and 3mm, a range that strikes a balance between structural strength and cost-effectiveness.

[0045] Alternatively, the thickness of each part of the support can be basically the same.

[0046] In any of the above embodiments, the support may optionally include at least one of carbon steel support, galvanized sheet support, and stainless steel support.

[0047] In this embodiment, the bracket can be made of carbon steel, galvanized sheet, or stainless steel as needed. For example, the bracket can be made of materials such as SPCC (Steel Plate Cold Commercial), SECC (Steel Electrolytic Cold Commercial), SGCC (Steel Galvanized Cold Commercial), or SUS304 (Steel Use Stainless 304).

[0048] For example, the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole, and the fifth mounting hole are circular holes or oblong holes.

[0049] In any of the above embodiments, optionally, the top cover includes a cover body and a flange formed by bending the cover body, the battery pack also includes a base, the top cover is used to be installed on one side of the base and forms a receiving cavity with the base through the cover body, the top cover is fixedly installed on the base through the flange; the electrical panel is installed on the base and is at least partially located inside the top cover.

[0050] In this embodiment, the battery pack includes a base, and the battery cells of the battery pack are mounted on the base. A top cover assembly is fitted onto the base, forming a relatively enclosed receiving cavity with the base. The top cover includes a cover body and a flange. The cover body includes a top wall and a side wall, and the flange is formed by bending outward from the side wall, extending along the thickness direction of the side wall so that the flange and the side wall are approximately at a 90° angle. During installation, the top cover can be fixedly mounted to the base via the flange; for example, the flange and the base can be connected by multiple screws or bolts to achieve a fixed installation of the top cover on the base.

[0051] Furthermore, the cover includes a top wall and side walls, with clearance holes provided on the side walls, and a bracket mounted on the outer side of the side walls. Specifically, the electrical panel is mounted on the base near the side wall of the cover, and at least a portion of the electrical panel is exposed through the clearance holes on the side walls. A flange is mounted on the side of the side wall away from the top wall and is formed by bending outwards from the side wall.

[0052] Furthermore, at least a portion of the electrical panel extends to the outside of the top cover through clearance holes.

[0053] The second aspect of this application provides a battery pack, including: an upper cover assembly provided by any of the technical solutions in the first aspect.

[0054] The battery pack proposed according to the technical solution of this application, since it includes the cover assembly provided by any of the technical solutions of the first aspect, therefore, has all the beneficial effects of the cover assembly provided by any of the technical solutions of the first aspect. Further details will not be elaborated here.

[0055] Furthermore, the battery pack also includes an electrical panel, at least a portion of which is located inside the top cover assembly and is exposed through clearance holes.

[0056] Furthermore, the battery pack also includes a base, a top cover mounted on the base, the cover of the top cover and the base forming a receiving cavity, and the flange of the top cover fixedly mounted on the base; the electrical panel is mounted on the base and is at least partially located inside the top cover.

[0057] The third aspect of this application proposes an energy storage device, comprising: a top cover assembly provided by any of the technical solutions in the first aspect; and / or a battery pack provided by any of the technical solutions in the second aspect.

[0058] The energy storage device proposed according to the technical solution of this application, since it includes the upper cover assembly provided by any of the technical solutions of the first aspect and / or the battery pack provided by any of the technical solutions of the second aspect, therefore, it has all the beneficial effects of the upper cover assembly provided by any of the technical solutions of the first aspect and / or the battery pack provided by any of the technical solutions of the second aspect. Further details will not be elaborated here.

[0059] In any of the above embodiments, the energy storage device may optionally be an inverter.

[0060] In any of the above embodiments, the energy storage device may optionally be a power conversion system.

[0061] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0062] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0063] Figure 1 One of the structural schematic diagrams of a battery pack according to an embodiment of the present invention is shown;

[0064] Figure 2 It shows Figure 1 A magnified schematic diagram of the local structure at point A;

[0065] Figure 3 A second schematic diagram of the structure of a battery pack according to an embodiment of the present invention is shown;

[0066] Figure 4 One of the structural schematic diagrams of the bracket according to an embodiment of the present invention is shown;

[0067] Figure 5 The second schematic diagram shows the structure of the bracket according to one embodiment of the present invention.

[0068] Figure label:

[0069] 1 Electrical panel, 2 Top cover, 22 Cover body, 222 Clearance hole, 224 Top wall, 226 Side wall, 24 Flanged edge, 3 Base, 4 Bracket, 42 First support part, 422 First mounting structure, 424 First mounting hole, 44 Second support part, 442 Second mounting structure, 444 Third mounting hole, 46 Connecting part, 5 First threaded connector, 6 Second threaded connector. Detailed Implementation

[0070] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0071] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0072] The following reference Figures 1 to 5 This application describes a cover support, battery pack, and energy storage device provided according to some embodiments.

[0073] like Figures 1 to 5 As shown, an embodiment of the first aspect of this application provides a top cover assembly for a battery pack. The battery pack includes an electrical panel 1. The top cover assembly includes a top cover 2 and a bracket 4. The top cover 2 is provided with a clearance hole 222 for exposing at least a portion of the electrical panel 1; the bracket 4 is mounted on the outside of the top cover 2, and at least a portion of the bracket 4 is disposed around the clearance hole 222.

[0074] The top cover assembly provided according to the embodiments of this application is used for a battery pack, which can be used in energy storage devices, such as inverters. The battery pack includes a top cover 2 and an electrical panel 1. At least a portion of the electrical panel 1 is located inside the battery pack. The top cover assembly constitutes at least a portion of the outer shell of the battery pack. A clearance hole 222 is provided on the top cover 2, and at least a portion of the electrical panel 1 is installed on the inner side of the top cover 2, and at least a portion of the electrical panel 1 can be exposed through the clearance hole 222 to facilitate wiring and other operations of the electrical panel 1. A bracket 4 is installed on the outer side of the top cover 2 to support the top cover 2 and improve the strength of the top cover 2. With this structure, since a bracket 4 is additionally provided on the outer side of the top cover 2 around the clearance hole 222, the strength of the top cover 2 can be ensured. Removing the bracket 4 inside the battery pack improves the internal space utilization of the battery pack while reducing the risk of battery pack airtightness failure and top cover 2 cracking, and the cost is lower. Specifically, the bracket 4, when assembled onto the top cover 2, enhances the structural strength of the mounting position of the top cover 2. This allows for the removal of the internal support structure of the battery pack, ensuring that the electrical panel 1 can be securely installed on the top cover 2 while preventing deformation of the top cover 2 and preventing airtightness failure of the battery pack. Furthermore, since the internal support structure of the battery pack is removed, the top cover 2 loses horizontal tension, thus preventing stress concentration at the corners of the two sides of the battery pack and significantly reducing the risk of cracking of the top cover 2.

[0075] Wherein, the bracket 4 is at least partially located around the clearance hole 222, meaning that at least a portion of the bracket 4 is disposed close to the clearance hole 222, or in other words, a portion of the bracket 4 is disposed around the clearance hole 222.

[0076] Optionally, the battery pack includes a base 3 and an openable top cover 2, which together form a receiving cavity to accommodate structures such as battery cells. The top cover 2 allows the battery to be opened or closed for easy access to the internal components of the battery pack for maintenance and other operations.

[0077] The electrical panel 1 includes one or more electrical components, such as sockets and switches. Specifically, the electrical panel 1 comprises a board body and one or more electrical components mounted on the board body. The electrical panel 1 is used to achieve electrical connections between the battery pack and other components.

[0078] In any of the above embodiments, optionally, as Figure 2 , Figure 3 and Figure 4 As shown, the upper cover 2 includes a cover body 22 and a flange 24 located at the edge of the cover body 22. The flange 24 extends along the thickness direction of the cover body 22 (i.e., the axial direction of the clearance hole 222). The flange 24 can be specifically formed by bending the edge of the cover body 22. The clearance hole 222 is provided on the cover body 22, and the bracket 4 is provided with a first support part 42 and a second support part 44 corresponding to the cover body 22 and the flange 24. The first support part 42 and the second support part 44 are connected by a connecting part 46. During installation, the first support part 42 is installed on the cover body 22 and is located close to the clearance hole 222, and the second support part 44 is installed on the flange 24 of the upper cover 2. This structure makes the shape of the bracket 4 more compatible with the shape of the upper cover 2, thus strengthening the strength of various parts of the upper cover 2, thereby improving the strength of the upper cover 2 in various parts and preventing the upper cover 2 from having weak points, which could lead to deformation or cracking.

[0079] In any of the above embodiments, optionally, in order to realize the installation between the first support portion 42 and the second support portion 44 and the upper cover 2, a first mounting structure 422 is provided on the first support portion 42, and a second mounting structure 442 is provided on the second support portion 44. During installation, the upper cover 2 can be installed with screws or snap-fit ​​through the mounting structures on the first support portion 42 and the second support portion 44.

[0080] In any of the above embodiments, optionally, as Figure 2 As shown, both the first support part 42 and the second support part 44 are fixedly installed on the upper cover 2 via threaded connectors (specifically, the first threaded connector 5 and the second threaded connector 6). Meanwhile, to facilitate the installation of the threaded connectors, as... Figure 3 and Figure 4As shown, a first mounting hole 424 adapted to the first threaded connector 5 is provided on the first support part 42, a second mounting hole adapted to the first threaded connector 5 is provided on the cover 22, a fifth mounting hole adapted to the second threaded connector 6 is provided on the electrical panel 1, a third mounting hole 444 adapted to the second threaded connector 6 is provided on the second support part 44, and a fourth mounting hole adapted to the second threaded connector 6 is provided on the flange 24. This structure allows for quick installation of the bracket 4, the cover 2, and the electrical panel 1 via the threaded connectors, thereby improving the ease of battery pack installation and simplifying the overall battery pack structure.

[0081] For example, the first threaded connector 5 and / or the second threaded connector 6 include hexagonal flange bolts. The nominal diameter of the hexagonal flange bolts can range from 4 mm to 6 mm.

[0082] In any of the above embodiments, optionally, as Figure 4 and Figure 5 As shown, the first support part 42 and the second support part 44 are connected in an arc shape, that is, the connecting part 46 between the two is arc-shaped. This makes the transition between the first support part 42 and the second support part 44 smoother and more seamless, avoiding the formation of right-angle bends at the connection point. This can eliminate the stress concentration points of traditional right-angle bends and improve the overall fatigue resistance of the bracket 4.

[0083] In any of the above embodiments, optionally, the first support portion 42 and the second support portion 44 are at a first angle α (e.g., Figure 4 As shown), the settings include a first angle α greater than or equal to 85° and less than or equal to 95°, and / or the cover 22 and the flange 24 forming a second angle β (as shown). Figure 3 As shown in the diagram, the first angle α and the second angle β are basically equal.

[0084] In this embodiment, the first support portion 42 is generally vertically arranged, and the second support portion 44 is generally horizontally arranged. Therefore, a first angle α is formed between the first support portion 42 and the second support portion 44. The first angle α can specifically be 85°-95°. In addition, the size of the first angle can be reasonably set based on the included angle (second angle β) between the side wall 226 and the flange 24 of the upper cover 2, so that the shape of the upper cover 2 and the shape of the bracket 4 can be adapted to each other. This can improve the fit between the two after the bracket 4 is installed on the upper cover 2, making the appearance of the battery pack more coordinated and aesthetically pleasing after the bracket 4 is installed on the upper cover 2.

[0085] In any of the above embodiments, optionally, as Figure 1 and Figure 2 As shown, the first support portion 42 surrounds at least a portion of the periphery of the clearance hole 222. The first support portion 42 covers at least one-third of the perimeter of the clearance hole 222.

[0086] In this embodiment, the first support portion 42 is disposed around at least a portion of the periphery of the clearance hole 222, thereby allowing the first support portion 42 to extend along at least a portion of the periphery of the electrical panel 1. The extension length of the first support portion 42 can be slightly longer; for example, based on the perimeter of the clearance hole 222, the first support portion 42 can cover at least one-third of the perimeter of the clearance hole 222, thus giving the first support portion 42 a longer extension length. This allows the first support portion 42 to provide better support for the upper cover 2, improving the strength of the upper cover 2.

[0087] Optionally, when the clearance hole 222 is a circular hole, the central angle corresponding to the arc segment covered by the first support portion 42 is 90° to 360°.

[0088] In any of the above embodiments, optionally, the clearance hole 222 is a polygonal hole, and the first support portion 42 covers at least two sides of the polygonal hole; and / or the outline of the first support portion 42 is adapted to the outline of the portion of the clearance hole 222 covered by the first support portion 42.

[0089] In this embodiment, the clearance hole 222 can be configured as a circle, polygon, or waist-shaped object. When the clearance hole 222 is a polygon, the first support portion 42 surrounds at least two sides of the polygonal hole, thereby giving the first support portion 42 a longer extension length. This allows the first support portion 42 to better support the upper cover 2 and improve the strength of the upper cover 2. The outline of the first support portion 42 is adapted to the outline of the portion of the clearance hole 222 covered by the first support portion 42; that is, the outline of the first support portion 42 is conformally set based on the clearance hole 222. This makes the overall shape of the battery pack more aesthetically pleasing after the bracket 4 is installed on the upper cover 2.

[0090] For example, the clearance hole 222 is a square hole or a rectangular hole, and the first support part 42 covers three sides of the square hole or rectangular hole, thereby forming a U-shaped structure.

[0091] In any of the above embodiments, optionally, as Figure 3 As shown, the width of the first support portion 42 is greater than or equal to 15 mm from the edge of the clearance hole 222 to the center.

[0092] In this embodiment, since mounting holes and other mounting structures need to be provided on the first support part 42 to achieve fixed installation between the first support part 42 and the upper cover 2, the width of the first support part 42 cannot be too narrow, otherwise the strength of the first support part 42 cannot be guaranteed. For example, the width of the first support part 42 can be set to be greater than 15mm.

[0093] Optionally, the width of the first support portion 42 is less than 100mm, for example, it can be 20mm-50mm.

[0094] In any of the above embodiments, optionally, the width and length of the second support portion 44 are the same as the width and length of the flange 24, and their shapes are also basically the same. This makes the appearance of the battery pack more harmonious and aesthetically pleasing after the top cover 2 and the bracket 4 are installed. The width direction of the flange 24 is as follows: Figure 1 As shown.

[0095] In any of the above embodiments, optionally, the width of the second support portion 44 is greater than or equal to 15 mm. The width of the second support portion 44 can be adaptively set according to the flange 24 of the upper cover 2. For example, the width of the second support portion 44 can be greater than 15 mm, which can ensure the connection strength between the second support portion 44 and the upper cover 2.

[0096] Optionally, the width of the second support part 44 is less than 100mm, for example, it can be 20mm-50mm.

[0097] In any of the above embodiments, optionally, as Figure 4 and Figure 5 As shown, the bracket 4 is a one-piece structure, meaning that the bracket 4 is a single unit. For example, when the bracket 4 includes a first support part 42, a second support part 44, and a connecting part 46, the first support part 42, the second support part 44, and the connecting part 46 are all one-piece structures. This improves the overall strength of the bracket 4 and facilitates its integral processing.

[0098] In any of the above embodiments, the bracket 4 may optionally be a metal bracket.

[0099] In this embodiment, the bracket 4 is a metal bracket, which can improve the strength of the bracket 4 and prevent the bracket 4 from deforming.

[0100] In any of the above embodiments, the top cover 2 may optionally be a plastic cover. This can reduce the cost of the top cover 2, and since the top cover 2 is mostly made of plastic in related solutions, the battery pack can reuse the original top cover 2, thereby reducing the cost of battery pack upgrades and replacements, which is conducive to the promotion and implementation of the improved battery pack.

[0101] Alternatively, the top cover 2 can also be a metal cover.

[0102] In any of the above embodiments, optionally, the thickness of the support 4 needs to be designed to take into account both the strength and cost of the support 4. Taking all factors into consideration, the thickness of the support 4 can be set to 1mm-3mm, which is a range that can balance the structural strength and cost of the support 4.

[0103] Optionally, the thickness of each part of the bracket 4 is basically the same.

[0104] In any of the above embodiments, the bracket 4 may optionally be made of carbon steel, galvanized sheet, or stainless steel as needed. For example, the bracket 4 may be made of materials such as SPCC (Steel Plate Cold Commercial), SECC (Steel Electrolytic Cold Commercial), SGCC (Steel Galvanized Cold Commercial), or SUS304 (Steel Use Stainless 304).

[0105] For example, the first mounting hole 424, the second mounting hole, the third mounting hole 444, the fourth mounting hole and the fifth mounting hole are circular holes or oblong holes.

[0106] In any of the above embodiments, optionally, the battery pack includes a base 3, and the battery cells of the battery pack are mounted on the base 3. A top cover assembly is fitted onto the base 3 to form a relatively enclosed receiving cavity with the base 3. The top cover 2 includes a cover body 22 and a flange 24. The cover body 22 includes a top wall 224 and a side wall 226. The flange 24 is formed by bending outwards from the side wall 226 and extends along the thickness direction of the side wall 226, such that the flange 24 and the side wall 226 are approximately at a 90° angle. During installation, the top cover 2 can be fixedly mounted to the base 3 via the flange 24. For example, the flange 24 and the base 3 can be connected by multiple screws or bolts to achieve fixed mounting of the top cover 2 on the base 3.

[0107] Furthermore, the cover 22 includes a top wall 224 and a side wall 226, with a clearance hole 222 provided on the side wall 226, and a bracket 4 mounted on the outer side of the side wall 226. That is, the electrical panel 1 is mounted on the base 3 near the side wall 226 of the cover 22, and at least a portion of the electrical panel 1 is exposed through the clearance hole 222 on the side wall 226. A flange 24 is mounted on the side of the side wall 226 away from the top wall 224 and is formed by bending outwards from the side wall 226.

[0108] Furthermore, at least a portion of the electrical panel 1 extends to the outside of the upper cover 2 through the clearance hole 222.

[0109] An embodiment of the second aspect of this application provides a battery pack including: a top cover assembly provided in any embodiment of the first aspect.

[0110] The battery pack proposed according to the embodiments of this application, since it includes the cover assembly provided in any embodiment of the first aspect, has all the beneficial effects of the cover assembly provided in any embodiment of the first aspect. Further details will not be elaborated here.

[0111] Furthermore, the battery pack also includes an electrical panel 1, at least a portion of which is located inside the top cover assembly, and at least a portion of which is exposed through clearance holes 222.

[0112] Furthermore, the battery pack also includes a base 3, on which a top cover 2 is mounted. The cover body 22 of the top cover 2 and the base 3 form a receiving cavity, and the flange 24 of the top cover 2 is fixedly mounted on the base 3. The electrical panel 1 is mounted on the base 3 and is at least partially located inside the top cover 2.

[0113] An embodiment of the third aspect of this application provides an energy storage device, comprising: a top cover assembly provided in any embodiment of the first aspect; and / or a battery pack provided in any embodiment of the second aspect.

[0114] The energy storage device proposed according to the embodiments of this application, since it includes the cover assembly provided in any embodiment of the first aspect and / or the battery pack provided in any embodiment of the second aspect, therefore, it has all the beneficial effects of the cover assembly provided in any embodiment of the first aspect and / or the battery pack provided in any embodiment of the second aspect. Further details will not be elaborated here.

[0115] In any of the above embodiments, the energy storage device may optionally be an inverter.

[0116] In any of the above embodiments, the energy storage device may optionally be a power conversion system.

[0117] The following combination Figures 1 to 5 To illustrate a specific embodiment of the battery pack.

[0118] With the development of new energy technologies, battery packs are increasingly being used in various devices. Existing battery packs generally consist of mounting various electrical component sockets onto a single electrical front panel, which is then attached to the top cover of the battery pack. This structure has the following problems:

[0119] 1. Since the front panel of the electrical components needs to be equipped with the base of all the electrical components, and the top cover of the battery pack cannot bear its weight, brackets are usually used inside the battery pack to fix some of the electrical components, which not only takes up internal space of the battery pack, but also increases costs.

[0120] 2. The battery pack cover is usually made of plastic, which is too weak and its assembly surface is prone to deformation, thus affecting the airtightness of the battery pack;

[0121] 3. The traditional battery pack uses a bracket inside, which puts a horizontal tension on the battery pack cover. The mounting surface between the battery pack and the lower casing puts a vertical tension on the cover. This causes stress concentration at the angle between the two sides of the battery pack cover, which may lead to cracking.

[0122] Based on the above background, this embodiment aims to solve the complex structural problem of the electrical component support inside the battery pack, as well as the airtightness problem of the battery pack, while reducing the risk of cracking of the battery pack cover.

[0123] This embodiment relates to a battery pack, including a pressure strip (a specific form of the bracket 4) for mounting on the upper cover 2 of the battery pack. The pressure strip includes a bent structure (equivalent to the connecting part 46 of the bracket 4), a horizontal surface (equivalent to the second support part 44 of the bracket 4), a vertical surface (equivalent to the first support part 42 of the bracket 4), a horizontal hole (equivalent to the third mounting hole 444 on the bracket 4), and a vertical hole (equivalent to the first mounting hole 424 on the bracket 4). The bent structure of the pressure strip partially overlaps with the upper cover 2 of the battery pack, allowing it to be stably placed at the corresponding position on the upper cover 2. Holes are provided on the horizontal surface, consistent with the holes on the upper cover 2, for bolt fastening of the pressure strip to the upper cover 2 and the lower housing (e.g., the base 3). The pressure strip and the electrical component panel are located on both sides of the upper cover 2. The vertical mounting surface of the pressure strip is a plane with holes, the holes of which are consistent with the holes on the upper cover 2 of the battery pack, for bolt fastening of the pressure strip to the upper cover 2 and the electrical component panel.

[0124] For example, the pressure strip is made of metal, including but not limited to SPCC (Steel Plate Cold Commercial), SECC (Steel Electrolytic Cold Commercial), SGCC (Steel Galvanized Cold Commercial), SUS304 (Steel Use Stainless 304), etc., with a thickness of 1mm-3mm.

[0125] For example, the bending angle of the structure is 85° to 95°, which is consistent with the angle of the top cover 2 of the battery pack, so as to ensure that the pressure strip is placed stably at the corresponding position of the top cover 2 of the battery pack, which facilitates assembly.

[0126] For example, the width of the horizontal plane is greater than 15mm, which is consistent with the side width and shape of the top cover 2 of the battery pack.

[0127] For example, a through hole is provided on the horizontal plane. The through hole is generally circular or oblong in shape. The hole position is consistent with the side hole position of the upper cover 2 to ensure that M4 to M6 hexagonal flange bolts can be installed to realize the bolt fastening of the pressure strip to the upper cover 2 and the lower box of the battery pack.

[0128] For example, the width of the vertical surface is greater than 15mm, and its shape is consistent with the outline of the assembly surface of the electrical component panel. The vertical surface is provided with through holes, which are generally circular or oblong in shape. The hole positions are consistent with the hole positions of the assembly surface of the electrical component panel to ensure that M4 to M6 hexagonal flange bolts can be installed to achieve bolt fastening of the pressure strip to the top cover 2 of the battery pack and the electrical component panel.

[0129] Beneficial effects

[0130] The battery pack pressure strip in this embodiment can save on the internal support structure of the battery pack, improve space utilization, reduce the risk of airtightness failure and cracking of the top cover 2, and is also cheaper. Specifically, it is reflected in the following three points:

[0131] First, the pressure strip structure is assembled on the top cover 2 of the battery pack, which can enhance the structural strength of the assembly position of the top cover 2, thereby saving the internal support structure of the battery pack and fixing all electrical components to the front panel of the electrical components.

[0132] Secondly, the pressure strip structure is assembled on the upper cover 2 of the battery pack, which can enhance the structural strength of the upper cover assembly position and prevent the battery pack from failing to seal.

[0133] Third, the pressure strip structure saves on the internal support structure of the battery pack. The top cover 2 of the battery pack loses the horizontal tension, so stress concentration will not occur at the corner of the two sides of the battery pack, which greatly reduces the risk of cracking of the top cover 2.

[0134] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0135] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An upper cover assembly, characterized by, For a battery pack, the battery pack including an electrical panel, the top cover assembly including: A top cover having clearance holes for exposing at least a portion of the electrical panel; A bracket is installed on the outside of the upper cover, and at least a portion of the bracket is disposed around the clearance hole.

2. The upper cover assembly according to claim 1, characterized in that, The upper cover includes a cover body and a flange connected to the edge of the cover body; The bracket includes a first support portion, a second support portion, and a connecting portion that connects the first support portion and the second support portion; The first support is mounted on the cover and is at least partially located around the clearance hole; the second support is mounted on the flange. The clearance hole is provided on the cover.

3. The upper cover assembly according to claim 2, characterized in that, At least a portion of the electrical panel is located inside the upper cover, and the portion of the electrical panel located inside the upper cover, the first support portion, and the cover body are connected by a first threaded connector. The first support portion is provided with a first mounting hole adapted to the first threaded connector, the cover body is provided with a second mounting hole adapted to the first threaded connector, and the electrical panel is provided with a fifth mounting hole adapted to the first threaded connector. The second support is fixed to the flange by a second threaded connector. The second support is provided with a third mounting hole that is adapted to the second threaded connector, and the flange is provided with a fourth mounting hole that is adapted to the second threaded connector.

4. The upper cover assembly according to claim 2, characterized in that, The connecting portion is arc-shaped; and / or The first support portion and the second support portion are arranged at a first angle, wherein the first angle is greater than or equal to 85° and less than or equal to 95°, and / or the cover and the flange are arranged at a second angle, wherein the first angle and the second angle are equal.

5. The upper cover assembly according to claim 2, characterized in that, The first support portion surrounds at least a portion of the periphery of the clearance hole and covers at least one-third of the perimeter of the clearance hole.

6. The upper cover assembly according to claim 5, characterized in that, The clearance hole is a polygonal hole, and the first support portion covers at least two sides of the polygonal hole; and / or the outline of the first support portion is adapted to the outline of the portion of the clearance hole covered by the first support portion.

7. The upper cover assembly according to claim 2, characterized in that, From the edge of the clearance hole to the center, the width of the first support portion is greater than or equal to 15 mm; and / or Along the width direction of the flange, the size of the second support portion is the same as the size of the flange, and / or the shape of the second support portion is the same as the shape of the flange; and / or The width of the second support part is greater than or equal to 15mm.

8. The cover assembly according to any one of claims 1 to 7, characterized in that, The support structure is an integral unit; and / or The bracket is a metal bracket; and / or The top cover is a plastic cover; and / or The thickness of the bracket is greater than or equal to 1 mm and less than or equal to 3 mm.

9. The cover assembly according to any one of claims 1 to 7, characterized in that, The top cover includes a cover body and a flange formed by bending the cover body. The battery pack also includes a base. The top cover is used to be installed on one side of the base and forms a receiving cavity with the base through the cover body. The top cover is fixedly installed on the base through the flange. The electrical panel is mounted on the base and is at least partially located inside the top cover; The cover includes a top wall and a side wall, the clearance hole is provided on the side wall, and the bracket is installed on the outside of the side wall.

10. A battery pack, characterized by, Includes the cover assembly as described in any one of claims 1 to 9.

11. An energy storage device, characterized by, Includes the cover assembly as described in any one of claims 1 to 9; and / or The battery pack as described in claim 10.

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