A box and a battery pack

Abstract

This utility model discloses a battery box and a battery pack. The box includes a shell, which includes a first base and an extension. The first base forms a receiving cavity and a first opening that are interconnected. The receiving cavity is used to receive battery cells. A first sealing member is used to seal the first opening and is disposed around at least a portion of the first opening. A first cover is disposed on the first opening. The first sealing member is sandwiched between the first base and the first cover. The extension protrudes from the first base or the first cover and surrounds at least a portion of the first opening, covering the first sealing member. This utility model aims to solve the technical problem of how to improve the sealing performance of the battery box.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a housing and battery pack. Background Technology

[0002] Currently, battery pack housings typically feature a sealing groove and a sealing ring around the opening, achieving a seal through the compression of the cover and housing. However, this sealing method often creates seams at the junction of the housing and cover, affecting the product's appearance. Furthermore, this method is highly dependent on process parameters such as clamping force, fastener distribution, and sealing ring compression during assembly. Deviations can lead to insufficient localized clamping, not only increasing the visibility of the seams but also potentially causing uneven sealing and reducing reliability. Therefore, existing battery pack housings generally require high processing and assembly precision, increasing manufacturing costs and process complexity, and limiting production efficiency and consistency. Utility Model Content

[0003] One objective of this invention is to provide a housing and battery pack that address the technical problem of improving the sealing performance of the battery housing.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a solution as follows: a housing, comprising: a shell, the shell including a first base and an extension, the first base forming an intercommunicating receiving cavity and a first opening, the receiving cavity being used to receive a battery cell; A first seal for sealing a first opening, the first seal being disposed around at least a portion of the first opening; A first cover is disposed over a first opening, a first seal is sandwiched between a first base and a first cover, an extension protrudes from the first base or the first cover and surrounds at least a portion of the first opening, and the extension covers the first seal.

[0005] Optionally, the extension and the first base are provided with a sealing groove, which communicates with the receiving cavity through the first opening; The first sealing element is disposed in the sealing groove and sandwiched between the first cover and the first base to seal the sealing groove.

[0006] Optionally, the first seal abuts against the extension.

[0007] Optionally, the first base includes a first connecting portion, which surrounds and forms a first opening, and the first connecting portion and the extension are adjacent and connected; The extension protrudes from the first connecting part in a direction away from the receiving cavity, and the extension and the first connecting part together form a sealing groove; The first cover includes a second connecting part, which is disposed opposite to the first connecting part and inserted into the sealing groove. The first sealing element is sandwiched between the first connecting part, the second connecting part and the extension part. The housing includes a first fastener, which passes through a first connecting part, a first seal, and a second connecting part to connect the first connecting part, the first seal, and the second connecting part.

[0008] Optionally, the receiving cavity has a second opening extending through the first substrate, and the second opening is adjacent to and connected to the first opening; The box includes a second cover, which covers the second opening and is connected to the first cover and the first base respectively to close the second opening.

[0009] Optionally, the housing includes a second seal, which is sandwiched between the second cover and the first base, as well as between the second cover and the first cover.

[0010] Optionally, a second fastener is provided through the second cover, the second seal and the first base to connect the second cover, the second seal and the first base; A third fastener is inserted through the second cover, the second seal, and the first cover to connect the second cover, the second seal, and the first cover.

[0011] Optionally, at least a portion of the first seal is inserted into the second opening, with the first seal abutting against the second seal.

[0012] Optionally, the first cover includes a second base and a protective portion. The second base covers the first opening, and the extension covers at least a portion of the second base. The second base is recessed in the direction close to the first base to form a third opening and a connector cavity that communicate with each other. The third opening is located on the side of the connector cavity away from the first base, and the protective portion covers the third opening.

[0013] Optionally, the connector cavity extends through the second substrate in a direction close to the second cover to form a fourth opening, the fourth opening being adjacent to the third opening, and at least a portion of the second seal is disposed around the fourth opening and on the side of the connector cavity close to the second opening.

[0014] Optionally, the first cover is recessed inward to form a relief groove, the extension is inserted into the relief groove, and the outer surface of the extension is flush with the outer surface of the first cover; or, The first substrate is recessed inward to form a relief groove, the extension is inserted into the relief groove, and the outer surface of the extension is flush with the outer surface of the first substrate.

[0015] Secondly, this application provides a battery pack including battery cells and a housing as described in any of the first aspects, wherein the battery cells are assembled in a receiving cavity of the housing.

[0016] The beneficial effects of this utility model are as follows: The housing includes a shell, the shell including a first base and an extension, the first base forming an interconnected receiving cavity and a first opening, the extension protruding from the first base and surrounding at least a portion of the first opening, the receiving cavity for receiving a battery cell; a first seal for sealing the first opening, the first seal surrounding at least a portion of the first opening and sandwiched between the first base and the extension; and a first cover covering the first opening, the extension covering the first seal and at least a portion of the first cover.

[0017] In practical applications, by providing an extension around the periphery of the first opening of the first substrate, and making the extension protrude from the first substrate to form a covering structure, the extension not only clamps the first seal but also covers at least part of the first cover. With this structure, when the first cover and the first substrate are assembled to form a splicing boundary, the extension can shield this splicing boundary. Even if there are small gaps in the assembly, these gaps will not be directly exposed, effectively reducing the visibility of the seam and improving the appearance integrity. Simultaneously, since the first seal is clamped between the first substrate and the extension, external forces entering the cavity must bypass the zigzag path formed by the extension. Compared to the traditional straight-line seam sealing method, the sealing path is significantly longer, greatly increasing the difficulty of penetration, thus significantly enhancing waterproof and dustproof reliability. Furthermore, the extension forms a shielding and water-guiding surface on its outer surface, guiding and deflecting external liquids when they flow to the splicing area, thereby preventing direct entry into the joint gap between the first cover and the first substrate, providing secondary protection. With this design, the sealing effect no longer depends heavily on the assembly clamping force or the machining accuracy of the parts. Even if there are slight deviations in the distribution or compression of the fasteners, the extension can still ensure the sealing stability and the appearance of the joint. Therefore, it can achieve a dual improvement in appearance and sealing reliability while reducing the requirements for machining and assembly accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the box provided in an embodiment of the present utility model; Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified view of a portion of region A in the middle; Figure 3This is a partial structural schematic diagram provided by an embodiment of the present invention to illustrate the first fastener.

[0020] Explanation of icon numbers: 20. Housing; 21. First base; 211. Receiving cavity; 212. First opening; 213. First connecting part; 214. Second opening; 22. Extension; 23. Sealing groove; 30. First seal; 40. First cover; 41. Second connecting part; 42. Second base; 421. Third opening; 422. Joint cavity; 423. Fourth opening; 43. Protective part; 50. First fastener; 60. Second seal; 70. Second cover; 80. Second fastener; 90. Third fastener. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 3 As shown, Figure 1 This is a structural schematic diagram of the box provided in an embodiment of the present utility model; Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified view of a portion of region A in the middle; Figure 3 This is a partial structural schematic diagram of the first fastener 50 provided in this embodiment of the utility model.

[0023] This utility model provides a housing, including a battery cell and a housing, with the battery cell assembled in the housing.

[0024] Specifically, the housing includes a shell 20, which includes a first base 21 and an extension 22. The first base 21 forms a receiving cavity 211 and a first opening 212 that are interconnected. The receiving cavity 211 is used to receive the battery cell. A first sealing member 30 is used to seal the first opening 212. The first sealing member 30 is disposed around at least a portion of the first opening 212. A first cover 40 is disposed on the first opening 212. The first sealing member 30 is sandwiched between the first base 21 and the first cover 40. The extension 22 protrudes from the first base 21 or the first cover 40 and is disposed around at least a portion of the first opening 212. The extension 22 covers the first sealing member 30.

[0025] In practical applications, by providing an extension 22 around the first opening 212 of the first base 21 and making the extension 22 protrude from the first base 21 to form a covering structure, the extension 22 not only clamps the first sealing element 30 but also covers at least part of the first cover 40. With this structure, when the first cover 40 and the first base 21 are assembled to form a splicing boundary, the extension 22 can shield this splicing boundary. Even if there are small gaps in the assembly, these gaps will not be directly exposed, thereby effectively reducing the visibility of the seam and improving the appearance integrity. Simultaneously, since the first sealing element 30 is clamped between the first base 21 and the extension 22, any external object entering the receiving cavity 211 must bypass the zigzag path formed by the extension 22. Compared to the traditional straight-line seam sealing method, the sealing path is significantly longer, greatly increasing the difficulty of penetration, thus significantly enhancing the reliability of waterproofing and dustproofing. Furthermore, the extension 22 forms a shielding and guiding surface on its outer surface, causing external liquid to be guided and deflected when it flows to the splicing area, thereby preventing it from directly entering the joint gap between the first cover 40 and the first base 21, thus providing secondary protection. With this design, the sealing effect no longer highly depends on the assembly clamping force or the machining accuracy of the parts. Even with slight deviations in the distribution or compression of the fasteners, the extension 22 can still ensure sealing stability and visual concealment of the joint. Therefore, it can achieve a dual improvement in aesthetics and sealing reliability while reducing the requirements for machining and assembly accuracy.

[0026] In some embodiments, see Figure 2 and Figure 3 The extension 22 and the first base 21 are surrounded to form a sealing groove 23, and the sealing groove 23 is connected to the receiving cavity 211 through the first opening 212; The first sealing element 30 is disposed in the sealing groove 23 and sandwiched between the first cover 40, the first base 21 and the extension 22 to seal the sealing groove 23.

[0027] In practical applications, by forming a sealing groove 23 between the first base 21 and the extension 22, and connecting the sealing groove 23 and the receiving cavity 211 through the first opening 212, an independent installation space surrounding the first opening 212 can be provided structurally. This allows the first sealing element 30 to be embedded within it, forming a multi-faceted clamping fit with the first cover 40, the first base 21, and the extension 22. This design ensures that the first sealing element 30 experiences more uniform force during compression, eliminating the reliance on compression of a single plane for sealing and effectively avoiding the problem of insufficient local compression caused by uneven distribution of assembly clamping force or fasteners in traditional structures. Simultaneously, the recessed arrangement of the sealing groove 23 allows the sealing element to be embedded at the splicing boundary, reducing visible seams and enabling extension and folding along the sealing path, significantly enhancing the reliability of waterproofing and dustproofing.

[0028] Optionally, see Figure 2 and Figure 3 The first seal 30 abuts against the extension 22.

[0029] The first sealing element 30 abuts against the extension 22, which can further reduce the space in the sealing groove 23, thereby reducing the amount of water vapor and dust entering the sealing groove 23 and improving the sealing effect.

[0030] Optionally, see Figure 2 and Figure 3 The first base 21 includes a first connecting portion 213, which surrounds and forms a first opening 212. The first connecting portion 213 and the extension portion 22 are adjacent and connected. The extension 22 protrudes from the first connecting part 213 in a direction away from the receiving cavity 211, and the extension 22 and the first connecting part 213 together form a sealing groove 23; The first cover 40 includes a second connecting part 41, which is disposed opposite to the first connecting part 213 and inserted into the sealing groove 23. The first sealing member 30 is sandwiched between the first connecting part 213, the second connecting part 41 and the extension part 22. The housing includes a first fastener 50, which passes through a first connecting part 213, a first sealing member 30, and a second connecting part 41 to connect the first connecting part 213, the first sealing member 30, and the second connecting part 41.

[0031] In practical applications, by providing a first connecting portion 213 surrounding the first opening 212 on the first base 21, and having the extension portion 22 protrude adjacent to and away from the receiving cavity 211 from the first connecting portion 213, a sealing groove 23 is formed by the extension portion 22 in conjunction with the first connecting portion 213. This gives the sealing groove 23 a clear spatial boundary and a stable positioning reference. Based on this, the first cover 40, through its second connecting portion 41, is positioned opposite to the first connecting portion 213 and inserted into the sealing groove 23. This allows the first cover 40 to be aligned and positioned with the housing 20 during assembly, ensuring installation accuracy. When the first sealing element 30 is sandwiched between the first connecting portion 213, the second connecting portion 41, and the extension portion 22, due to its increased force-bearing surface and three-dimensional clamping relationship, the sealing element is compressed evenly, resulting in more stable sealing performance. Meanwhile, the first fastener 50 passes through the first connecting part 213, the first sealing element 30, and the second connecting part 41, directly locking the three together. This ensures that the sealing element is always in a reliable compressed state and avoids loosening of the seal due to cover displacement or assembly tolerances. Through this composite fixing method of direct connection with fasteners on three sides, the sealing reliability and resistance to external interference of the sealing groove 23 are further enhanced, and the structural strength and assembly stability of the joint between the cover and the shell 20 are improved. Thus, while reducing dependence on processing accuracy, the integrity of the appearance joint and the consistency of the seal are improved.

[0032] In this embodiment, the first fastener 50 is a bolt, and the first connecting part 213 and the second connecting part 41 are provided with threaded holes. The bolt connects the first connecting part 213 and the second connecting part 41 through the threaded holes.

[0033] In some embodiments, see Figure 1 The cavity 211 extends through the first base 21 and forms a second opening 214. The second opening 214 is adjacent to and connected to the first opening 212. The box includes a second cover 70, which covers the second opening 214 and is connected to the first cover 40 and the first base 21 respectively to close the second opening 214.

[0034] In practical applications, by setting a second opening 214 through the receiving cavity 211 on the first base 21 and making the second opening 214 adjacent to and connected to the first opening 212, a dual-opening layout can be achieved in the shell 20 structure. This facilitates the assembly, testing, and maintenance of the battery cell module or internal components, improving overall assembly flexibility and process adaptability. Simultaneously, the second cover 70 directly covers the second opening 214 and is connected to both the first cover 40 and the first base 21. This ensures the second opening 214 is completely closed while forming a continuous transition structure between the cover and the shell 20. This prevents the opening boundary from relying solely on a single cover for sealing, further reducing sealing risks caused by uneven assembly precision or stress. The composite connection between the second cover 70, the first cover 40, and the first base 21 also forms a stable frame that supports and constrains each other, thereby improving the overall strength and sealing integrity of the closed parts. This results in better sealing durability and aesthetic integrity of the enclosure during long-term use, while reducing the exposure of external seams.

[0035] Further, see Figure 1 The housing includes a second sealing element 60, which is sandwiched between the second cover 70 and the first base 21, and between the second cover 70 and the first cover 40.

[0036] In practical applications, the second sealing element 60 can evenly distribute the pressing force of the cover on the housing 20, reduce the risk of leakage caused by uneven local pressing, thereby enhancing the overall sealing reliability, and maintaining the flatness of the appearance of the housing 20 and the consistency of the joints, so that the housing has higher protective performance and process tolerance adaptability in actual assembly and use.

[0037] Optionally, refer to Figure 1The housing includes a second fastener 80, which passes through the second cover 70, the second seal 60 and the first base 21 to connect the second cover 70, the second seal 60 and the first base 21; and a third fastener 90, which passes through the second cover 70, the second seal 60 and the first cover 40 to connect the second cover 70, the second seal 60 and the first cover 40.

[0038] In practical applications, the second cover 70, the second seal 60, and the first base 21 are reliably connected by the second fastener 80, and the second cover 70, the second seal 60, and the first cover 40 are fixed by the third fastener 90. This achieves multi-point compression of the area adjacent to the second opening 214 and the first opening 212, ensuring uniform force on the second seal 60 and avoiding leakage or uneven sealing caused by insufficient local compression. Simultaneously, the configuration of multiple fasteners enhances the overall rigidity and stability between the cover and the housing 20. Even with machining tolerances or assembly deviations, the sealing path remains continuous and complete, thereby improving the overall waterproof and dustproof performance and assembly reliability of the housing, and maintaining a smooth and consistent appearance at the seams.

[0039] In this embodiment, the second fastener 80 and the third fastener 90 can be bolts, and the fixing method of the second fastener 80 and the third fastener 90 is similar to that of the first fastener 50.

[0040] Optionally, refer to Figure 1 and Figure 2 At least a portion of the first seal 30 is inserted into the second opening 214, and the first seal 30 abuts against the second seal 60.

[0041] In practical applications, a portion of the first sealing element 30 is inserted into the second opening 214 and abuts against the second sealing element 60, realizing a superimposed and pressing structure of the first sealing element 30 and the second sealing element 60. The interaction between the two sealing elements extends the sealing path and increases the contact surface, effectively reducing the risk of single-point sealing failure. At the same time, the abutting relationship ensures the uniformity of sealing between the covers and between the covers and the housing 20, thereby further enhancing the overall waterproof and dustproof reliability of the housing and reducing the dependence on the precision of processing and the strictness of assembly process.

[0042] Optionally, refer to Figure 1 The first cover 40 includes a second base 42 and a protective portion 43. The second base 42 covers the first opening 212, and the extension 22 covers at least a portion of the second base 42. The second base 42 is recessed in the direction close to the first base 21 to form a third opening 421 and a connector cavity 422 that are interconnected. The third opening 421 is located on the side of the connector cavity 422 away from the first base 21, and the protective portion 43 covers the third opening 421.

[0043] In practical applications, the protective part 43 covering the third opening 421 and the joint cavity 422 not only enhances the structural integrity, but also forms an additional barrier to prevent dust, moisture or impurities from entering the interior of the enclosure, thereby improving the waterproof and dustproof reliability of the enclosure. At the same time, the multi-layer cover and recessed structure disperse stress, which reduces the requirements for assembly precision and helps to improve assembly consistency and sealing stability.

[0044] Furthermore, referring to Figure 1 The connector cavity 422 extends through the second base 42 in a direction close to the second cover 70 to form a fourth opening 423. The fourth opening 423 is adjacent to the third opening 421. At least a portion of the second seal 60 is disposed around the fourth opening 423 and is disposed on the side of the connector cavity 422 close to the second opening 214.

[0045] In practical applications, the connector cavity 422 of the second substrate 42 forms a fourth opening 423, which is arranged adjacent to the third opening 421. This allows the sealing element to be set around the fourth opening 423, effectively sealing the connection area between the inside of the connector cavity 422 and the outside. The second sealing element 60 is located on the side of the connector cavity 422 near the second opening 214. The sealing effect is further enhanced by multi-point clamping, ensuring that moisture, dust or impurities cannot enter the box. At the same time, it ensures reliable mating between the connector cavity 422 and the second cover 70, thereby improving the waterproof and dustproof performance of the entire box.

[0046] In some embodiments, when the extension 22 is disposed on the first base 21, the first cover 40 is recessed inward to form a relief groove, the extension 22 is inserted into the relief groove, and the outer surface of the extension 22 is flush with the outer surface of the first cover 40. When the extension 22 is disposed on the first cover 40, the first base 21 is recessed inward to form a relief groove, the extension 22 is inserted into the relief groove, and the outer surface of the extension 22 is flush with the outer surface of the first base 21.

[0047] In practical applications, the extension 22 is inserted into the relief groove after assembly, and its outer surface is flush with the outer surface of the adjacent first cover 40 or first base 21 to avoid steps or protrusions, improve the flatness of the outer surface of the box, reduce the occupation of installation space by the protrusion, optimize the outer contour of the box, and facilitate stacking and transportation.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0049] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0050] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A case characterized by comprising: include: The housing includes a first base and an extension, the first base having a communicating receiving cavity and a first opening, the receiving cavity being used to receive a battery cell; A first seal for sealing the first opening, the first seal being disposed around at least a portion of the first opening; A first cover is disposed over the first opening, a first seal is sandwiched between the first base and the first cover, an extension protrudes from the first base or the first cover and surrounds at least a portion of the first opening, and the extension covers the first seal.

2. The housing according to claim 1, characterized in that, The extension and the first base form a sealing groove, and the sealing groove communicates with the receiving cavity through the first opening; The first sealing element is disposed in the sealing groove and sandwiched between the first cover and the first base to seal the sealing groove.

3. The case of claim 2, wherein, The first seal abuts against the extension.

4. The housing according to claim 2, characterized in that, The first base includes a first connecting portion, which surrounds and forms the first opening, and the first connecting portion and the extension portion are adjacent to and connected. The extension protrudes from the first connecting portion in a direction away from the receiving cavity, and the extension and the first connecting portion together form the sealing groove; The first cover includes a second connecting portion, which is disposed opposite to the first connecting portion and inserted into the sealing groove. The first sealing member is sandwiched between the first connecting portion, the second connecting portion and the extension portion. The housing includes a first fastener, which passes through the first connecting portion, the first sealing element, and the second connecting portion to connect the first connecting portion, the first sealing element, and the second connecting portion.

5. The housing according to claim 1, characterized in that, The receiving cavity extends through the first substrate and forms a second opening, which is adjacent to and connected to the first opening. The box body includes a second cover, which covers the second opening and is connected to the first cover and the first base respectively to close the second opening.

6. The case of claim 5, wherein, The housing includes a second sealing element, which is sandwiched between the second cover and the first base, and between the second cover and the first cover.

7. The case of claim 6, wherein, The enclosure includes: A second fastener is inserted through the second cover, the second seal, and the first base to connect the second cover, the second seal, and the first base; A third fastener is inserted through the second cover, the second seal, and the first cover to connect the second cover, the second seal, and the first cover.

8. The case of claim 6, wherein, At least a portion of the first seal is inserted into the second opening, and the first seal abuts against the second seal.

9. The case of claim 6, wherein, The first cover includes a second base and a protective portion. The second base covers the first opening, and the extension covers at least a portion of the second base. The second base is recessed toward the first base to form a third opening and a connector cavity that communicate with each other. The third opening is located on the side of the connector cavity away from the first base, and the protective portion covers the third opening.

10. The housing according to claim 9, characterized in that, The connector cavity extends through the second base in a direction close to the second cover to form a fourth opening. The fourth opening is adjacent to the third opening. At least a portion of the second seal is disposed around the fourth opening and is located on the side of the connector cavity close to the second opening.

11. The housing according to claim 1, characterized in that, The first cover is recessed inward to form a relief groove, the extension is inserted into the relief groove, and the outer surface of the extension is flush with the outer surface of the first cover. or, The first substrate is recessed inward to form a relief groove, the extension is inserted into the relief groove, and the outer surface of the extension is flush with the outer surface of the first substrate.

12. A battery pack, characterized in that, It includes a battery cell and a housing as described in any one of claims 1-11, wherein the battery cell is assembled in the receiving cavity of the housing.

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