Box body and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a box body and a battery pack. The frame is arranged on one side of the bottom plate assembly in the first direction, and the frame is provided with a frame bottom wall attached to the bottom plate assembly; the riveting assembly sequentially penetrates through the bottom plate assembly and the frame bottom wall in the first direction, the riveting assembly comprises a first boss and a second boss, the bottom plate assembly and the frame bottom wall are fixedly connected through the first boss and the second boss, and the second boss is located on the side, away from the bottom plate assembly, of the frame bottom wall; the thickness of the first boss is T1, the thickness of the second boss is T2, the circumferential diameter of the second boss is R2, and T1 * T2 * R2 is larger than or equal to 25.65 mm and smaller than or equal to 96.25 mm. According to the box body provided by the utility model, the values of T1, T2 and R2 are reasonably controlled, the bearing capacity of the riveting assembly is ensured, and the space in the height direction of the battery pack is prevented from being influenced.

Description

Technical Field

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

[0002] A battery pack typically includes a base plate assembly and a frame surrounding the base plate assembly. In related technologies, the base plate assembly and the frame are often connected by rivet nuts.

[0003] Since the base plate assembly needs to support the battery and bear most of the battery pack's weight, the thickness of the supporting portion of the rivet nut is necessary to ensure sufficient load-bearing capacity. However, excessive thickness of the rivet nut's supporting portion can easily affect the space in the height direction of the battery pack. Therefore, balancing the load-bearing capacity and space occupation of the rivet nut has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, the present invention provides a housing and battery pack to solve the problem of how to balance the load-bearing capacity and space occupation of the rivet nut.

[0005] In a first aspect, this utility model provides a housing, comprising:

[0006] Base plate assembly;

[0007] A frame is disposed on one side of the base plate assembly along a first direction, and the frame has a bottom wall that fits against the base plate assembly.

[0008] The riveting assembly passes through the base plate assembly and the bottom wall of the frame in sequence along the first direction. The riveting assembly includes a first boss and a second boss. The base plate assembly and the bottom wall of the frame are fastened together by the first boss and the second boss, and the second boss is located on the side of the bottom wall of the frame away from the base plate assembly.

[0009] The thickness of the first boss is T1, the thickness of the second boss is T2, and the circumferential diameter of the second boss is R2, satisfying: 25.65mm≤T1·T2·R2≤96.25mm.

[0010] Beneficial Effects: The housing provided in this embodiment, by reasonably controlling the lower limits of T1, T2, and R2, can comprehensively control the lower limits of the thickness T1 of the first boss, the thickness T2 of the second boss, and the circumferential diameter R2 of the second boss, thereby ensuring the load-bearing capacity of the riveting assembly and ensuring that the riveting assembly can bear the weight of the battery on the base plate assembly, avoiding connection failure. Furthermore, by reasonably controlling the upper limits of T1, T2, and R2, the upper limits of the thickness T1 of the first boss, the thickness T2 of the second boss, and the circumferential diameter R2 of the second boss can be comprehensively controlled, thereby avoiding affecting the space in the height direction of the battery pack, ensuring that the riveting difficulty is within a reasonable range, and avoiding deformation of the base plate or frame during the riveting process.

[0011] Secondly, the present invention also provides a battery pack, comprising: a battery pack; and a housing as described above suitable for accommodating the battery pack.

[0012] Since the battery pack includes the casing and has the same effect as the casing, it will not be elaborated on here. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a cross-sectional view of the housing of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A;

[0016] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0017] Figure 4 This is a bottom view of the housing of this utility model;

[0018] Figure 5 for Figure 4 Enlarged view of point B.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Frame; 11. Frame bottom wall; 2. Base plate assembly; 3. Riveting assembly;

[0021] 21. Bottom protective plate; 22. Bottom plate; 23. First adhesive layer; 24. Second adhesive layer;

[0022] 31. Rivet nut; 311. First boss; 312. Second boss; 32. Rivet bolt; 321. Bolt support. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0028] According to an embodiment of the present invention, in one aspect, a housing is provided, comprising:

[0029] Base plate assembly 2;

[0030] The frame 1 is disposed on one side of the base plate assembly 2 along the first direction, and the frame 1 has a frame bottom wall 11 that fits against the base plate assembly 2.

[0031] The riveting assembly 3 passes through the base plate assembly 2 and the bottom wall of the frame 11 in sequence along the first direction. The riveting assembly 3 includes a first boss 311 and a second boss 312. The base plate assembly 2 and the bottom wall of the frame 11 are fastened together by the first boss 311 and the second boss 312, and the second boss 312 is located on the side of the bottom wall of the frame 11 away from the base plate assembly 2.

[0032] The thickness of the first boss 311 is T1, the thickness of the second boss 312 is T2, and the circumferential diameter of the second boss 312 is R2, satisfying: 25.65mm≤T1·T2·R2≤96.25mm.

[0033] In this embodiment, the plane where the first boss 311 is located and the plane where the second boss 312 is located are both parallel to the second direction, wherein the first direction is not parallel to the second direction.

[0034] In some embodiments, the first direction is perpendicular to the second direction. Both the first direction and the second direction can be... Figure 2 The directions shown, specifically in this embodiment, can be either vertical or horizontal.

[0035] In this embodiment, the riveting component 3 can specifically be a rivet, and further, the rivet can be a blind rivet, or a component that combines a rivet nut and a rivet bolt.

[0036] In some embodiments, the riveting assembly 3 includes a rivet nut 31 and a rivet bolt 32 screwed to the rivet nut 31, a first boss 311 is disposed on the rivet nut 31, and a second boss 312 is formed by partially deforming the rivet nut 31 and extending along a second direction.

[0037] The main body of the rivet nut 31 can be in the form of a nut sleeve. The first boss 311 can be a flange edge formed on the nut sleeve. The first boss 311 and the nut sleeve can be integrally formed. To facilitate the insertion of the nut sleeve, the second boss 312 is not yet formed before riveting. After the rivet nut 31 is inserted through the base plate assembly 2 and the bottom wall of the frame 11 in sequence, the nut sleeve can be locally deformed by continuously tightening the rivet nut 31, and the deformed area extends along the second direction to form the second boss 312. At this time, the base plate assembly 2 and the bottom wall of the frame 11 are fastened together by the first boss 311 and the second boss 312. The second boss 312 is located on the side of the bottom wall of the frame 11 away from the base plate assembly 2, while the first boss 311 can be located on the side of the base plate 22 away from the bottom wall of the frame 11, and the first boss 311 is located between the bottom guard plate 21 and the base plate 22.

[0038] When the base plate assembly 2 is connected to the bottom wall of the frame 11 by the riveting assembly 3, the connection is made by the first boss 311 and the second boss 312 formed after riveting. At this time, the base plate assembly 2 supports the battery and bears most of the weight of the battery pack. The force will eventually be applied to the riveting assembly 3, specifically making the second boss 312 the stress point. Therefore, the relevant parameters of the second boss 312 are directly related to the connection strength. By reasonably controlling the relevant parameters of the second boss 312, the connection strength can be guaranteed and connection failure can be avoided.

[0039] In this embodiment, since the first boss 311 can be located on the side of the base plate 22 away from the bottom wall 11 of the frame, during the continuous tightening of the rivet nut 31, which causes the nut sleeve to deform locally to form the second boss 312, the clamping force between the first boss 311 and the base plate 22 is suitable to ensure the smooth formation of the second boss 312. When the thickness T1 of the first boss 311 is too small, it is easy to deform under stress during the riveting process; when the thickness T1 of the first boss 311 is too large, it is easy to affect the space in the height direction of the battery pack. In addition, since the base plate assembly 2 supports the battery, the first boss 311 will also bear a certain amount of gravity.

[0040] In this embodiment, the second boss 312 is specifically formed by a local deformation of the nut sleeve, and the deformation area extends along the second direction. That is, the thickness T2 of the second boss 312 is actually the wall thickness of the nut sleeve overlapping. When the thickness T2 of the second boss 312 is too small, it is easy to fail to support the weight of the battery on the base plate assembly 2, resulting in connection failure. At this time, the circumferential diameter R2 of the second boss 312 needs to be increased to ensure the load-bearing capacity of the second boss 312. When the thickness T2 of the second boss 312 is too large, it means that the wall thickness of the nut sleeve is large. Although the riveting force is increased, the riveting difficulty will also increase sharply, and it is easy to cause deformation of the base plate or frame, and it is easy to cause deformation of the first boss 311. At this time, the circumferential diameter R2 of the second boss 312 needs to be reduced to reduce the molding difficulty.

[0041] Therefore, it is necessary to reasonably balance the dimensional relationship between T1, T2, and R2.

[0042] The housing provided in this embodiment, by reasonably controlling the lower limits of T1, T2, and R2, can comprehensively control the lower limits of the thickness T1 of the first boss, the thickness T2 of the second boss, and the circumferential diameter R2 of the second boss, thereby ensuring the load-bearing capacity of the riveting assembly 3 and ensuring that the riveting assembly 3 can bear the weight of the battery on the base plate assembly 2, avoiding connection failure. Furthermore, by reasonably controlling the upper limits of T1, T2, and R2, the upper limits of the thickness T1 of the first boss, the thickness T2 of the second boss, and the circumferential diameter R2 of the second boss can be comprehensively controlled, thereby avoiding affecting the space in the height direction of the battery pack, ensuring that the riveting difficulty is within a reasonable range, and avoiding deformation of the base plate or frame during the riveting process.

[0043] For example, in this embodiment, the value of T1·T2·R2 can be 25.65mm or 28mm or 35mm or 42mm or 48mm or 51mm or 55mm or 59mm or 63mm or 67mm or 70mm or 75mm or 80mm or 96mm or 96.25mm, or it can be any range formed by any two of the above values.

[0044] In some embodiments, the thickness T1 of the first boss 311 satisfies: 1.5mm ≤ T1 ≤ 2.5mm;

[0045] And / or, the thickness T2 of the second boss 312 satisfies: 1.9mm≤T2≤3.5mm;

[0046] And / or, the circumferential diameter R2 of the second boss 312 satisfies: 9mm≤R2≤11mm.

[0047] In this embodiment, the second boss 312 is specifically formed by a partial deformation of the nut sleeve, with the deformed area extending along the second direction. Parallel to the second direction, the cross-sectional shape of the second boss 312 can be circular. In this case, based on the circumferential diameter R2 of the second boss 312, the contact area between the second boss 312 and the bottom wall 11 of the frame can be further determined.

[0048] For example, in this embodiment, the value of T1 can be 1.5mm, 1.8mm, 1.9mm, 2mm, 2.2mm, or 2.5mm, or it can be a range formed by any two of the above values.

[0049] For example, in this embodiment, the value of T2 can be 1.9mm or 2mm or 2.2mm or 2.5mm or 2.3mm or 2.8mm or 3mm or 3.2mm or 3.5mm, or it can be a range formed by any two of the above values.

[0050] For example, in this embodiment, the value of R2 can be 9mm or 9.5mm or 9.8mm or 10mm or 10.5mm or 10.8mm or 11mm, or it can be a range formed by any two of the above values.

[0051] In some embodiments, combined with Figure 2 As shown, a first adhesive layer 23 is provided between the frame 1 and the base plate assembly 2. The first adhesive layer 23 is suitable for bonding the frame 1 and the base plate assembly 2 together, satisfying: 25.65mm≤T1·T2·R2≤68.75mm.

[0052] In this embodiment, a first adhesive layer 23 is provided between the frame 1 and the base plate assembly 2, and the value of T2 satisfies: 1.9mm≤T2≤2.5mm.

[0053] In this embodiment, the first adhesive layer 23 can specifically be an adhesive layer.

[0054] When a first adhesive layer 23 is provided between the frame 1 and the base plate assembly 2, there is a certain connection force between the two due to the adhesive force of the glue. At this time, the thickness T2 of the second boss 312 can be appropriately reduced to meet the load-bearing requirements. That is, the upper limit of T1·T2·R2 can be appropriately smaller.

[0055] For example, in this embodiment, the value of T1·T2·R2 can be 25.65mm or 28mm or 35mm or 42mm or 48mm or 51mm or 55mm or 59mm or 63mm or 67mm or 68.75mm, or it can be any range formed by any two of the above values.

[0056] In some embodiments, combined with Figure 2 As shown, the base plate assembly 2 includes a base guard plate 21 and a base plate 22. The base plate 22 is fitted to the bottom wall 11 of the frame, and the base guard plate 21 is located on the side of the base plate 22 away from the frame 1.

[0057] The first protrusion 311 is located on the side of the base plate 22 away from the bottom wall 11 of the frame, and the first protrusion 311 is located between the bottom guard plate 21 and the base plate 22.

[0058] Specifically, the base plate 22 can be a support plate or a heat exchange plate.

[0059] In this embodiment, the bottom protective plate 21 serves as the lowest layer of the housing, preventing bumps and protecting the bottom plate 22 and the battery.

[0060] The base plate 22 is fitted to the bottom wall of the frame 11. Specifically, the base plate 22 can be fitted to the battery pack inside the box so as to play a heat exchange role for the battery pack.

[0061] By setting the first protrusion 311 on the side of the base plate 22 away from the bottom wall 11 of the frame, and the first protrusion 311 being located between the bottom guard plate 21 and the base plate 22, the first protrusion 311 can support the base plate 22.

[0062] Additionally, in some embodiments, the riveting assembly 3 includes a rivet nut 31 and a rivet bolt 32 screwed to the rivet nut 31, the rivet bolt 32 having a bolt support portion 321 abutting against the side of the bottom guard plate 21 away from the bottom plate 22.

[0063] The bolt support 321 can support the bottom guard plate 21.

[0064] In some embodiments, combined with Figure 2 As shown, a second adhesive layer 24 is provided between the bottom protective plate 21 and the bottom plate 22. The second adhesive layer 24 is suitable for bonding the bottom protective plate 21 and the bottom plate 22 together, satisfying: 25.65mm≤T1·T2·R2≤73.15mm, and satisfying: 1.5mm≤T1≤1.9mm.

[0065] In this embodiment, the second adhesive layer 24 can specifically be an adhesive layer.

[0066] When a second adhesive layer 24 is provided between the bottom guard plate 21 and the bottom plate 22, due to the adhesive force, there is a certain connection force between the two. At this time, the thickness T2 of the second boss 312 can be appropriately reduced to meet the load-bearing requirements. That is, the upper limit of T1·T2·R2 can be appropriately reduced. At the same time, the thickness T1 of the first boss 311 can also be appropriately reduced to meet the support requirements of the bottom guard plate 21.

[0067] For example, in this embodiment, the value of T1·T2·R2 can be 25.65mm or 28mm or 35mm or 42mm or 48mm or 51mm or 55mm or 59mm or 63mm or 67mm or 70mm or 73.15mm, or it can be any range formed by any two of the above values.

[0068] In some embodiments, a first adhesive layer 23 is provided between the frame 1 and the base plate assembly 2, and the first adhesive layer 23 is adapted to bond the frame 1 and the base plate assembly 2 together; a second adhesive layer 24 is provided between the bottom guard plate 21 and the base plate 22, and the second adhesive layer 24 is adapted to bond the bottom guard plate 21 and the base plate 22 together; satisfying: 25.65mm≤T1·T2·R2≤52.25mm, and satisfying: 1.5mm≤T1≤1.9mm, 1.9mm≤T2≤2.5mm.

[0069] When a first adhesive layer 23 is provided between the frame 1 and the base plate assembly 2, there is a certain connection force between the two due to the adhesive force of the glue. At this time, the thickness T2 of the second protrusion 312 can be appropriately reduced to meet the load-bearing requirements. When a second adhesive layer 24 is provided between the bottom guard plate 21 and the base plate 22, there is a certain connection force between the two due to the adhesive force of the glue. That is, the upper limit of T1·T2·R2 can be appropriately reduced. At the same time, the thickness T1 of the first protrusion 311 can also be appropriately reduced, and the thickness T2 of the second protrusion 312 can also be appropriately reduced to meet the support requirements of the bottom guard plate 21.

[0070] For example, in this embodiment, the value of T1·T2·R2 can be 25.65mm or 28mm or 35mm or 42mm or 48mm or 51mm or 52.25, or it can be any range formed by any two of the above values.

[0071] For example, in this embodiment, the value of T1 can be 1.5mm, 1.8mm, or 1.9mm, or it can be any range formed by any two of the above values.

[0072] For example, in this embodiment, the value of T2 can be 1.9mm, 2mm, 2.2mm, or 2.5mm, or it can be any range formed by any two of the above values.

[0073] In some embodiments, combined with Figure 4 , Figure 5 As shown, along the extension path of the frame 1, the box includes multiple riveting components 3, and the distance between two adjacent riveting components 3 is L, which satisfies: 70mm≤L≤90mm.

[0074] In this embodiment, the frame 1 is disposed on one side of the base plate assembly 2 along the first direction, and the frame 1 surrounds the edge of the base plate assembly 2 to form a closed frame structure.

[0075] Along the extension path of the frame 1, there can be multiple riveting components 3. Multiple riveting components 3 can surround the edge of the base plate component 2, thereby achieving the connection between the base plate component 2 and the frame 1 through the connection and cooperation of multiple points.

[0076] When the distance L between two adjacent riveting components 3 is close, the relevant parameters T1, T2, and R2 of the riveting component 3 can be appropriately smaller after the force is distributed among the riveting components 3. However, when the distance L between two adjacent riveting components 3 is large, the relevant parameters T1, T2, and R2 of the riveting component 3 need to be appropriately larger after the force is distributed among the riveting components 3.

[0077] For example, in this embodiment, the value of L can be 70mm or 72mm or 75mm or 78mm or 80mm or 82mm or 85mm or 88mm or 90mm, or it can be a range formed by any two of the above values.

[0078] According to an embodiment of the present invention, another aspect provides a battery pack, comprising:

[0079] Battery pack;

[0080] And a housing, as described above, suitable for accommodating battery packs.

[0081] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A box, characterized in that, include: Base plate assembly (2); A frame (1) is disposed on one side of the base plate assembly (2) along a first direction, and the frame (1) has a frame bottom wall (11) that fits against the base plate assembly (2); The riveting assembly (3) passes through the base plate assembly (2) and the bottom wall of the frame (11) in sequence along the first direction. The riveting assembly (3) includes a first boss (311) and a second boss (312). The base plate assembly (2) and the bottom wall of the frame (11) are fastened together via the first boss (311) and the second boss (312). The second boss (312) is located on the side of the bottom wall of the frame (11) away from the base plate assembly (2). The thickness of the first boss (311) is T1, the thickness of the second boss (312) is T2, and the circumferential diameter of the second boss (312) is R2, satisfying: 25.65mm≤T1·T2·R2≤96.25mm.

2. The housing according to claim 1, characterized in that, The thickness T1 of the first boss (311) satisfies: 1.5mm≤T1≤2.5mm; And / or, the thickness T2 of the second boss (312) satisfies: 1.9mm≤T2≤3.5mm; And / or, the circumferential diameter R2 of the second boss (312) satisfies: 9mm≤R2≤11mm.

3. The housing according to claim 1, characterized in that, A first adhesive layer (23) is provided between the frame (1) and the base plate assembly (2). The first adhesive layer (23) is adapted to bond the frame (1) and the base plate assembly (2) together, satisfying: 25.65mm≤T1·T2·R2≤68.75mm.

4. The housing according to claim 1, characterized in that, The base plate assembly (2) includes a base guard plate (21) and a base plate (22). The base plate (22) is fitted to the bottom wall (11) of the frame. The base guard plate (21) is located on the side of the base plate (22) away from the frame (1). The first boss (311) is located on the side of the base plate (22) away from the bottom wall (11) of the frame, and the first boss (311) is located between the bottom guard plate (21) and the base plate (22).

5. The housing according to claim 4, characterized in that, A second adhesive layer (24) is provided between the bottom protective plate (21) and the bottom plate (22). The second adhesive layer (24) is suitable for bonding the bottom protective plate (21) and the bottom plate (22) together, satisfying: 25.65mm≤T1·T2·R2≤73.15mm, and satisfying: 1.5mm≤T1≤1.9mm.

6. The housing according to claim 4, characterized in that, A first adhesive layer (23) is provided between the frame (1) and the base plate assembly (2), the first adhesive layer (23) being adapted to bond the frame (1) and the base plate assembly (2); a second adhesive layer (24) is provided between the bottom guard plate (21) and the base plate (22), the second adhesive layer (24) being adapted to bond the bottom guard plate (21) and the base plate (22); It satisfies: 25.65mm≤T1·T2·R2≤52.25mm, and satisfies: 1.5mm≤T1≤1.9mm, 1.9mm≤T2≤2.5mm.

7. The housing according to claim 1, characterized in that, Along the extension path of the frame (1), the box includes a plurality of the riveting components (3), and the distance between two adjacent riveting components (3) is L, satisfying: 70mm≤L≤90mm.

8. The housing according to any one of claims 1 to 7, characterized in that, The plane containing the first boss (311) and the plane containing the second boss (312) are both parallel to the second direction, wherein the first direction is not parallel to the second direction.

9. The housing according to claim 8, characterized in that, The riveting assembly (3) includes a rivet nut (31) and a rivet bolt (32) screwed to the rivet nut (31). The first boss (311) is disposed on the rivet nut (31), and the second boss (312) is formed by partial deformation of the rivet nut (31) and extending along the second direction.

10. The housing according to claim 4, characterized in that, The riveting assembly (3) includes a rivet nut (31) and a rivet bolt (32) screwed to the rivet nut (31). The rivet bolt (32) has a bolt support portion (321) that abuts against the side of the bottom guard plate (21) away from the bottom plate (22).

11. A battery pack, characterized in that, include: Battery pack; And a housing as described in any one of claims 1 to 10 above, suitable for accommodating the battery pack.

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