Battery box and battery pack

Abstract

This utility model belongs to the field of secondary battery technology and discloses a battery box and battery pack. The battery box includes a box body and a lifting lug assembly. The lifting lug assembly includes a base and a connector. The base is fixedly connected to the box body, and the connector passes through the base and is detachably connected to the base. The connector is provided with a fixing hole for connecting external fasteners. This battery box, by adopting a split lifting lug assembly and detachably connecting the base and connector, avoids the use of welding to connect the connector to the base, thereby avoiding the adverse consequences of poor welding and welding heat effects. This not only simplifies the manufacturing process but also ensures the assembly and connection accuracy of the battery box during use.

Description

Technical Field

[0001] This utility model relates to the field of secondary battery technology, and in particular to battery boxes and battery packs. Background Technology

[0002] With the rapid development of the new energy industry, high-strength, lightweight, and high-energy-density battery pack designs have become mainstream. In the process of high-strength and lightweight design, aluminum housing designs are increasingly being incorporated into design and use. Conventional aluminum housing designs include extruded profile aluminum housings, die-cast aluminum housings, stamped aluminum housings, extrusion + die-casting combinations, and extrusion + stamping combinations. To mount the battery housing onto a vehicle, mounting lugs are typically extended from the housing frame, and these lugs are usually welded with connectors. These connectors typically have connection holes for connecting to the vehicle frame. However, because the connection between the lugs and connectors is welded, the connectors can deform during the welding process, affecting the dimensional accuracy of the connection holes. This can prevent the aluminum housing from being successfully connected to the vehicle frame. Furthermore, the welded connection between the connectors and lugs results in fixed connection hole values, leading to low versatility when the aluminum housing needs to be connected to different vehicle frames, affecting practical use and potentially increasing costs.

[0003] Therefore, a battery box and battery pack are needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a battery box and battery pack. The battery box adopts a split lifting lug assembly, which simplifies the manufacturing process, reduces welding defects and welding heat effects, and ensures the assembly connection strength of the battery pack during use.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery box, comprising a box body and a lifting lug assembly, the lifting lug assembly comprising a base and a connector, the base being fixedly connected to the box body, the connector passing through the base and being detachably connected to the base, the connector being provided with a fixing hole for connecting external fasteners.

[0007] As an optional technical solution, the connector includes a first connecting part and a second connecting part. A portion of the structure of the first connecting part passes through the base, and the base limits the first connecting part. The second connecting part is sleeved on the outer periphery of the first connecting part. The first connecting part and the second connecting part are detachably connected to the base.

[0008] As an optional technical solution, the base is provided with a connecting hole, the first connecting part is provided with an external thread, the second connecting part is provided with an internal thread, the first connecting part passes through the connecting hole, and the portion of the first connecting part passing through the connecting hole is threadedly connected to the second connecting part.

[0009] As an optional technical solution, the connecting hole is a stepped hole, the connecting hole includes a first connecting hole and a second connecting hole, the first connecting hole and the second connecting hole are connected by an abutting surface, the first connecting part includes a connecting post and an abutting platform, the connecting post passes through the first connecting hole, the abutting platform is located in the second connecting hole, and the end face of the abutting platform near the connecting post abuts against the abutting surface, and the external thread is provided on the connecting post.

[0010] As an optional technical solution, the fixing hole and / or the second connecting part are polygonal in shape.

[0011] As an optional technical solution, the base is provided with a connecting threaded hole, and the connector includes a connecting seat and a connecting rod. The connecting rod is provided with an external thread so that the connector and the base can be detachably connected.

[0012] As an optional technical solution, the lifting lug assembly further includes a fastener, the base is provided with a connecting hole, the connector includes a connecting seat and a connecting rod, the connecting rod passes through the connecting hole, the base is provided with a threaded hole, the connecting seat is provided with a through hole, and the fastener passes through the through hole and is threadedly connected to the threaded hole to detachably connect the connector and the base.

[0013] As an optional technical solution, multiple threaded holes are provided, and the multiple threaded holes are evenly distributed along the circumference of the connecting hole, and the through hole is provided corresponding to the threaded hole.

[0014] As an optional technical solution, the base is also provided with a limiting groove, and the connecting seat is provided with a limiting protrusion, and the limiting protrusion and the limiting groove are configured to cooperate.

[0015] To achieve this objective, the present invention also adopts the following technical solution:

[0016] A battery pack, comprising battery cells and a battery housing as described above, wherein the battery cells are disposed inside the battery housing.

[0017] To achieve this objective, the present invention also adopts the following technical solution:

[0018] A vehicle, the vehicle including the battery pack as described above.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a battery box, which includes a box body and a lifting lug assembly. The lifting lug assembly includes a base and a connector. The base is fixedly connected to the box body, and the connector passes through the base and is detachably connected to the base. The connector has a fixing hole for connecting external fasteners. This battery box, by adopting a split lifting lug assembly and detachably connecting the connector and the base, avoids the use of welding to connect the connector to the base, thereby avoiding the adverse consequences of poor welding and welding heat effects. This not only simplifies the manufacturing process but also ensures the assembly and connection accuracy of the battery box during use.

[0021] This utility model also discloses a battery pack, which includes battery cells and the aforementioned battery box, with the battery cells disposed inside the battery box. This battery pack can avoid the low positional accuracy of the lifting lug assembly caused by welding deformation, thereby improving the installation positional accuracy of the battery pack. At the same time, it avoids the reduction in strength caused by poor welding, ensuring the installation strength of the battery pack.

[0022] This utility model also discloses a vehicle that includes the aforementioned battery pack. By installing this battery pack, the vehicle can ensure the accuracy of the battery pack's installation position and effectively ensure the connection strength of the battery pack, thereby improving its service life. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the battery box structure of Embodiment 1 of this utility model;

[0024] Figure 2 This is a top view of the battery box according to Embodiment 1 of this utility model;

[0025] Figure 3 yes Figure 2 Schematic diagram of the structure of AA;

[0026] Figure 4 yes Figure 3 A magnified view of part B in the image;

[0027] Figure 5 This is an exploded view of the lifting lug assembly of Embodiment 1 of this utility model;

[0028] Figure 6 This is a cross-sectional view of the lifting lug assembly of Embodiment 2 of this utility model;

[0029] Figure 7 This is an exploded view of the lifting lug assembly of Embodiment 2 of this utility model;

[0030] Figure 8 This is a cross-sectional view of the lifting lug assembly of Embodiment 3 of this utility model;

[0031] Figure 9This is an exploded view of the lifting lug assembly of Embodiment 3 of this utility model;

[0032] Figure 10 This is a schematic diagram of the connecting member in Embodiment 3 of this utility model.

[0033] In the picture:

[0034] 10. Box body; 11. First frame; 12. Second frame;

[0035] 20. Lifting lug assembly; 21. Base; 2111. First connecting hole; 2112. Second connecting hole; 2113. Limiting groove; 2114. Connecting threaded hole; 2115. Threaded hole; 22. First connecting part; 221. Connecting column; 222. Abutment platform; 23. Second connecting part; 24. Connecting piece; 241. Connecting seat; 2411. Through hole; 242. Connecting rod; 243. Fixing hole; 244. Limiting protrusion; 245. Bolt. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] Example 1

[0041] like Figures 1 to 5 As shown, this embodiment provides a battery box, which includes a box body 10 and a lifting lug assembly 20. The lifting lug assembly 20 includes a base 21, a first connecting part 22 and a second connecting part 23. The base 21 is connected to the box body 10. A portion of the structure of the first connecting part 22 passes through the base 21, and the base 21 limits the first connecting part 22. The second connecting part 23 is sleeved on the outer periphery of the first connecting part 22. The first connecting part 22 and the second connecting part 23 are detachably connected so that the first connecting part 22 and the second connecting part 23 are connected to the base 21. The first connecting part 22 is provided with a fixing hole 243 for connecting external fasteners. Specifically, in this embodiment, the base 21 is connected to the housing 10 by welding, ensuring the stability of the connection between the housing 10 and the base 21. A portion of the first connecting part 22 passes through the base 21, and the second connecting part 23 is sleeved on the end of the first connecting part 22 that passes through the base 21 and is detachably connected to the first connecting part 22. This allows the base 21 to connect with the first connecting part 22 and the second connecting part 23. This arrangement eliminates the need for welding when connecting the first connecting part 22 and the second connecting part 23 to the base 21, avoiding deformation caused by welding and strength differences due to poor welding. This improves the battery box's lifespan and installation accuracy. The first connecting part 22 has a fixing hole 243 through which fixing bolts can pass, allowing the battery box to be installed on the vehicle frame, enhancing ease of use. Furthermore, for different battery box models, adjustments to the installation dimensions can be made by replacing the corresponding first connecting part 22 and the second connecting part 23, demonstrating strong versatility.

[0042] In another embodiment, the base 21 can also be connected to the housing 10 by riveting or bolting, which will not be described in detail here.

[0043] Further, please refer to Figure 3 and Figure 4The base 21 has a connecting hole. The first connecting part 22 has an external thread, and the second connecting part 23 has an internal thread. The first connecting part 22 passes through the connecting hole, and the portion of the first connecting part 22 passing through the connecting hole is threadedly connected to the second connecting part 23. Specifically, in this embodiment, the first connecting part 22 includes a connecting post 221. The outer wall of the connecting post 221 has an external thread, and the connecting post 221 passes through the connecting hole on the base 21. The second connecting part 23 has an annular structure with an internal thread in its inner ring. The second connecting part 23 and the connecting post 221 of the first connecting part 22 are threadedly connected, so that the first connecting part 22 and the second connecting part 23 are connected to the base 21. The threaded connection between the first connecting part 22 and the second connecting part 23 ensures connection stability and facilitates disassembly and assembly of the first connecting part 22 and the second connecting part 23, improving convenience during use.

[0044] Further, please refer to Figure 5 The connecting hole is a stepped hole, including a first connecting hole 2111 and a second connecting hole 2112. The first connecting hole 2111 and the second connecting hole 2112 are connected by an abutting surface. The first connecting part 22 includes a connecting post 221 and an abutting platform 222. The connecting post 221 passes through the first connecting hole 2111, and the abutting platform 222 is located in the second connecting hole 2112. The abutting platform 222 abuts against the end face of the connecting post 221 and the abutting surface. An external thread is provided on the connecting post 221. Specifically, in this embodiment, the first connecting hole 2111 and the second connecting hole 2112 are coaxially arranged and connected by an abutment surface. The diameter of the second connecting hole 2112 is larger than the diameter of the first connecting hole 2111, and the second connecting hole 2112 is located on the side of the first connecting hole 2111 away from the second connecting portion 23. When the first connecting portion 22 and the second connecting portion 23 are threaded together, the connecting post 221 of the first connecting portion 22 passes through the first connecting hole 2111. The abutment platform 222 is located in the second connecting hole 2112, which can prevent the first connecting part 22 from protruding from the end face of the base 21, thereby reducing the risk of collision and improving safety in use. Moreover, the abutment platform 222 is close to the end face of the connecting post 221 and the abutment surface, which can ensure that the abutment platform 222 and the abutment surface are flat and abutted, thereby ensuring that the force on the first connecting part 22 is more balanced, avoiding the phenomenon of uneven force on the first connecting part 22 due to the uneven end face of the base 21. This not only improves the safety performance in use, but also extends the service life.

[0045] Preferably, the lifting lug assembly 20 further includes an anti-loosening washer disposed between the second connecting portion 23 and the base 21. Specifically, in this embodiment, the lifting lug assembly 20 further includes an anti-loosening washer disposed between the second connecting portion 23 and the base 21, which can prevent the first connecting portion 22 and the second connecting portion 23 from becoming loose, effectively preventing the first connecting portion 22 and the second connecting portion 23 from separating, thereby improving the safety performance during use.

[0046] In another embodiment, threadlocker can be injected between the external thread of the first connecting part 22 and the internal thread of the second connecting part 23 to prevent the first connecting part 22 and the second connecting part 23 from separating, thereby improving safety during use.

[0047] Further, please refer to Figure 5 The fixing hole 243 is polygonal. Specifically, in this embodiment, the fixing hole 243 is a regular hexagonal structure. When installing the first connecting part 22, an internal hex wrench can be inserted into the fixing hole 243. The internal hex wrench can prevent the first connecting part 22 from rotating during the installation process, thereby not only improving the installation efficiency but also ensuring the installation effect.

[0048] In another embodiment, the fixing hole 243 can also be pentagonal, quadrilateral, or triangular, etc., and the installation efficiency can be improved by making corresponding plug-in parts, which will not be elaborated here.

[0049] Further, please refer to Figure 5 The second connecting part 23 has a polygonal shape. Specifically, in this embodiment, the second connecting part 23 has a regular hexagonal structure. When installing the second connecting part 23, an external hexagonal sleeve can be fitted onto the outer periphery of the second connecting part 23. The external hexagonal sleeve can prevent the second connecting part 23 from rotating during installation, which would cause the first connecting part 22 and the second connecting part 23 to be improperly installed, thus affecting the connection stability of the first connecting part 22 and the second connecting part 23, thereby ensuring the installation effect and improving the service life.

[0050] In another embodiment, the shape of the second connecting part 23 can also be pentagonal, quadrilateral, or triangular, etc., and the installation efficiency can be improved by making corresponding plug-in parts, which will not be elaborated here.

[0051] Further, please refer to Figure 2The housing 10 includes two first side frames 11, two second side frames 12, and a base plate. The two first side frames 11 are parallel and spaced apart, and the two second side frames 12 are parallel and spaced apart. The first ends of the two first side frames 11 are respectively connected to the first and second ends of one of the second side frames 12, and the second ends of the two first side frames 11 are respectively connected to the first and second ends of the other second side frame 12 to form side frames. The side frames and the base plate are fixedly connected. Specifically, in this embodiment, the two first side frames 11, the two second side frames 12, and the base plate form the accommodating space of the housing 10 for accommodating battery cells, improving the stability of battery cell installation. In this embodiment, the length of the first side frame 11 is less than the length of the second side frame 12, making the accommodating space a cuboid structure, which is suitable for vehicles and improves the convenience of use.

[0052] Specifically, in this embodiment, the box 10 also includes a box cover, which is fixedly connected to the frame to seal the containment space.

[0053] In another embodiment, the housing 10 is directly connected to the vehicle structure to ensure the sealing performance of the containment space.

[0054] Further, please refer to Figure 2 The lifting lug assembly 20 is provided in two sets, which are symmetrically arranged on the outer walls of the two second frame 12. Specifically, in this embodiment, the two sets of lifting lug assemblies 20 are symmetrically arranged on the outer walls of the two second frame 12 with respect to the length direction of the housing 10, and each set of lifting lug assemblies 20 contains two lifting lug assemblies 20, and the two lifting lug assemblies 20 are spaced apart, which can improve the stability during use.

[0055] This embodiment also provides a battery pack, which includes battery cells and the aforementioned battery housing, with the battery cells disposed inside the battery housing. Specifically, in this embodiment, the battery cells are disposed within the accommodating space of the housing 10. This type of battery pack can avoid low positional accuracy of the lifting lug assembly 20 caused by welding deformation, thereby improving the installation positional accuracy of the battery pack. At the same time, it avoids strength reduction caused by poor welding, ensuring the installation strength of the battery pack.

[0056] This embodiment also provides a vehicle that includes the aforementioned battery pack. Specifically, in this embodiment, the vehicle includes a frame and fasteners. The fasteners pass through the fixing holes 243 and are fixedly connected to the frame, thereby mounting the battery pack onto the frame. By installing this battery pack, this vehicle can ensure the accuracy of the battery pack's installation position and effectively ensure the connection strength of the battery pack, thereby improving its service life.

[0057] Example 2

[0058] like Figures 6 to 7As shown, this embodiment provides a battery box, a battery pack, and a vehicle. The difference between the battery box in this embodiment and the battery box in embodiment 1 is that the specific connection method of the lifting lug assembly 20 and the base 21 is different.

[0059] Specifically, in this embodiment, the base 21 is provided with a connecting threaded hole 2114, and the connector 24 includes a connecting seat 241 and a connecting rod 242. The connecting rod 242 is provided with an external thread so that the connector 24 and the base 21 can be detachably connected.

[0060] In this embodiment, the base 21 is connected to the housing 10 by welding, ensuring the connection stability between the housing 10 and the base 21. The base 21 is provided with a threaded hole 2114, and the external thread of the connecting rod 242 of the connector 24 can be threaded into the threaded hole 2114, thereby ensuring the ease of assembly and disassembly of the connector 24 and the base 21. At the same time, a welding-free connection method can be used to connect the base 21 and the connector 24, avoiding the deformation caused by welding and the strength difference caused by poor welding, thereby improving the service life of the battery box and the installation position accuracy. The fixing hole 243 on the connector 24 can pass through the fixing bolt 245, thereby installing the battery box onto the vehicle frame, improving the convenience during use. Moreover, for different models of battery boxes, when different installation size adjustments are required, the adjustment can be completed by replacing the connector 24 with fixing holes 243 of different sizes, which has strong versatility.

[0061] Furthermore, the base 21 is provided with a limiting groove 2113, and the connecting seat 241 is provided with a limiting protrusion 244, and the limiting protrusion 244 and the limiting groove 2113 are configured to cooperate. Specifically, in this embodiment, the limiting groove 2113 on the base 21 has an annular structure, and the limiting protrusion 244 on the connecting seat 241 also has an annular structure. When the connecting post 221 and the connecting threaded hole 2114 are threadedly connected, the limiting groove 2113 and the limiting protrusion 244 can be correspondingly inserted and cooperate, thereby enabling the base 21 and the connecting member 24 to limit each other, thereby preventing thread failure between the base 21 and the connecting member 24, and thus improving the reliability during use.

[0062] Alternatively, in another embodiment, the limiting ring groove can also be provided on the connecting seat 241, and the limiting protrusion 244 can be correspondingly provided on the base 21, which can also achieve the same effect. No limitation is made here.

[0063] Furthermore, the fixing hole 243 is polygonal. Specifically, in this embodiment, the fixing hole 243 has a regular hexagonal structure. When installing the connector 24, an Allen wrench can be inserted into the fixing hole 243. The Allen wrench can prevent the connector 24 from rotating during installation, thereby improving installation efficiency and ensuring installation effect. Moreover, the installed connector 241 can be completely accommodated in the second connecting hole 2112 of the connecting hole, thereby reducing the risk of bumps caused by the exposed connector 241 and improving safety during use.

[0064] Example 3

[0065] like Figures 8 to 10 As shown, this embodiment provides a battery box, a battery pack, and a vehicle. The difference between the battery box in this embodiment and the battery box in embodiment 2 is that the specific connection method of the lifting lug assembly 20 and the base 21 is different.

[0066] Specifically, in this embodiment, the lifting lug assembly 20 further includes fasteners. The base 21 has a connecting hole, and the connector 24 includes a connecting seat 241 and a connecting rod 242. The connecting rod 242 passes through the connecting hole. The base 21 has a threaded hole 2115, and the connecting seat 241 has a through hole 2411. The fastener passes through the through hole 2411 and is threaded into the threaded hole 2115, thus detachably connecting the connector 24 and the base 21. The base 21 and connector 24 are connected using a weld-free connection method, avoiding deformation caused by welding and strength differences due to poor welding, thereby improving the battery box's service life and installation position accuracy. The fixing hole 243 on the connector 24 allows the fixing bolt 245 to pass through, thus installing the battery box onto the vehicle frame, improving ease of use. Furthermore, for different models of battery boxes, when different installation size adjustments are required, the adjustment can be completed by replacing the connector 24 with fixing holes 243 of different sizes, which has strong versatility.

[0067] In one possible implementation, a plurality of threaded holes 2115 are provided, and the plurality of threaded holes 2115 are evenly distributed along the circumference of the connecting hole, and a plurality of through holes 2411 are provided in one-to-one correspondence with the plurality of threaded holes 2115.

[0068] Specifically, multiple threaded holes 2115 are provided, and these multiple threaded holes 2115 are evenly distributed around the periphery of the connecting hole. Multiple through holes 2411 are provided on the connecting seat 241, and these multiple through holes 2411 are evenly distributed around the axis of the connecting post 221. The multiple threaded holes 2115 and the multiple through holes 2411 are connected in a one-to-one correspondence. The fastener is a bolt 245, and multiple bolts 245 are provided. These multiple bolts 245 are threaded through the multiple through holes 2411 and then threadedly connected to the multiple threaded holes 2115 in a one-to-one correspondence, thereby detachably connecting the connecting part 24 and the base 21. This connection method can reduce the problem of poor installation stability caused by the loosening of the bolts 245, thereby improving safety during use.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery box, characterized in that, The battery box includes a box body (10) and a lifting lug assembly (20). The lifting lug assembly (20) includes a base (21) and a connector (24). The base (21) is fixedly connected to the box body (10). The connector (24) passes through the base (21) and is detachably connected to the base (21). The connector (24) is provided with a fixing hole (243) for connecting external fasteners.

2. The battery box according to claim 1, characterized in that, The connector (24) includes a first connecting part (22) and a second connecting part (23). A portion of the structure of the first connecting part (22) passes through the base (21), and the base (21) limits the first connecting part (22). The second connecting part (23) is sleeved on the outer periphery of the first connecting part (22), and the first connecting part (22) and the second connecting part (23) are detachably connected so that the first connecting part (22) and the second connecting part (23) are connected to the base (21).

3. The battery box according to claim 2, characterized in that, The base (21) has a connecting hole, the first connecting part (22) has an external thread, the second connecting part (23) has an internal thread, the first connecting part (22) passes through the connecting hole, and the part of the first connecting part (22) that passes through the connecting hole is threadedly connected to the second connecting part (23).

4. The battery box according to claim 3, characterized in that, The connecting hole is a stepped hole, and the connecting hole includes a first connecting hole (2111) and a second connecting hole (2112). The first connecting hole (2111) and the second connecting hole (2112) are connected by an abutment surface. The first connecting part (22) includes a connecting post (221) and an abutment platform (222). The connecting post (221) passes through the first connecting hole (2111), and the abutment platform (222) is located in the second connecting hole (2112). The abutment platform (222) abuts against the end face of the connecting post (221) and the abutment surface. The external thread is provided on the connecting post (221).

5. The battery box according to claim 2, characterized in that, The fixing hole and / or the second connecting part (23) are polygonal in shape.

6. The battery box according to claim 1, characterized in that, The base (21) is provided with a connecting threaded hole (2114), and the connector (24) includes a connecting seat (241) and a connecting rod (242). The connecting rod (242) is provided with an external thread so that the connector (24) and the base (21) can be detachably connected.

7. The battery box according to claim 1, characterized in that, The lug assembly (20) also includes a fastener. The base (21) is provided with a connecting hole. The connector (24) includes a connecting seat (241) and a connecting rod (242). The connecting rod (242) passes through the connecting hole. The base (21) is provided with a threaded hole (2115). The connecting seat is provided with a through hole (2411). The fastener passes through the through hole (2411) and is threadedly connected to the threaded hole (2115) to detachably connect the connector (24) and the base (21).

8. The battery box according to claim 7, characterized in that, The threaded holes (2115) are provided in multiple ways, and the multiple threaded holes (2115) are evenly distributed along the circumference of the connecting hole. The through hole (2411) is provided in correspondence with the threaded holes (2115).

9. The battery box according to any one of claims 6-8, characterized in that, The base (21) is also provided with a limiting groove (2113), and the connecting seat (241) is provided with a limiting protrusion (244), and the limiting protrusion (244) and the limiting groove (2113) are configured to cooperate.

10. A battery pack, the battery pack comprising battery cells, characterized in that, The battery pack further includes a battery case as described in any one of claims 1-9, wherein the battery cells are disposed inside the battery case.

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