Battery box and battery pack

Abstract

This utility model relates to the field of battery technology, and provides a battery box and battery pack. The battery box includes a box body and a bracket. A support member is provided inside the box body. A mounting groove is formed on the support member. The bracket overlaps the support member. The bracket is provided with a connector. The connector snaps into the mounting groove. This enables rapid positioning and installation between the bracket and the box body, allowing the positioning structure to simultaneously provide a fixing effect, thereby simplifying the installation process and improving space utilization.

Description

Technical Field

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

[0002] In related technologies, the plastic bracket for the BMS (Battery Management System) inside the battery box is typically fixed to the box body with fasteners. This makes the fixing process between the BMS plastic bracket and the box body complex, and the connection between the two occupies a lot of space. Furthermore, to ensure the proper positioning of the BMS plastic bracket and the box body, additional positioning structures are required, resulting in redundant installation structures and high installation costs. Utility Model Content

[0003] The present invention provides a battery box and battery pack, which are directly made into a bracket by means of a support member, and the bracket can be quickly installed by means of a snap-fit ​​between a connector and a mounting slot, thereby at least partially solving the above-mentioned technical problems.

[0004] In a first aspect, embodiments of the present invention provide a battery box, comprising:

[0005] The housing has internal support members, and the support members have mounting grooves formed on them;

[0006] The bracket is attached to the support member, and the bracket is provided with a connector that is snapped into the mounting groove.

[0007] In one embodiment, the connector includes:

[0008] The main body is connected to the bracket;

[0009] The snap-fit ​​part is connected to the main body part, and the snap-fit ​​part protrudes toward the support member and snaps into the mounting groove.

[0010] In one embodiment, the snap-fit ​​portion is clearance-fitted with the mounting groove.

[0011] In one embodiment, the distance between the snap-fit ​​portion and the side wall of the mounting groove is D1, which satisfies: 0.5 mm ≤ D1 ≤ 2 mm.

[0012] In one embodiment, one of the bottom surface of the snap-fit ​​portion and the bottom surface of the mounting groove is provided with a positioning post extending toward the other, and the other is provided with a positioning hole, wherein the positioning post is snapped into the positioning hole.

[0013] In one embodiment, the positioning pin and the positioning hole are in clearance fit.

[0014] In one embodiment, the distance between the positioning post and the wall of the positioning hole is D2, which satisfies: 0.075 mm ≤ D2 ≤ 0.225 mm.

[0015] In one embodiment, the height of the positioning post is H1, and the depth of the mounting groove is H2, satisfying: H1≤H2.

[0016] In one embodiment, the main body and the snap-fit ​​portion form a groove on the side away from the mounting groove, and the groove is provided with reinforcing ribs.

[0017] In one embodiment, the reinforcing rib is flush with the surface of the bracket.

[0018] In one embodiment, the main body includes a first side spaced apart from the bracket and a second side connected to one end of the first side. The second side is inclined in a direction away from the axis of the main body and is connected to the bracket. The included angle between the second side and the first side is A, which satisfies: 135°≤A≤160°.

[0019] In one embodiment, the main body further includes a third side connected to the other end of the first side, the third side being inclined in a direction away from the axis of the main body and connected to the bracket, wherein the included angle between the third side and the first side is B, satisfying: 135°≤B≤160°.

[0020] In one embodiment, an adhesive layer is provided between the snap-fit ​​portion and the wall surface of the mounting groove.

[0021] In one embodiment, at least two connectors are provided, and the at least two connectors are spaced apart along the periphery of the bracket, wherein the mounting slots correspond one-to-one with the connectors.

[0022] In one embodiment, at least two of the connectors are distributed non-centrally symmetrically on the bracket.

[0023] In one embodiment, the side wall of the mounting groove is provided with a protrusion, which abuts against the connector.

[0024] In one embodiment, the protrusion is inclined away from the sidewall of the mounting groove along the direction from the groove opening to the bottom of the groove.

[0025] Secondly, embodiments of the present invention provide a battery pack, comprising:

[0026] As mentioned above, the battery box;

[0027] The battery module is housed within the casing.

[0028] The beneficial effects of the embodiments of this utility model are as follows:

[0029] In embodiments of this invention, a connector is constructed on the bracket. When the bracket is attached to the support member of the housing, the connector engages with the mounting groove of the support member. This enables rapid positioning and installation between the bracket and the housing, allowing the positioning structure to simultaneously provide a fixing effect, simplifying the installation process and improving space utilization. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the battery box provided in an embodiment of the present invention;

[0032] Figure 2 This is an exploded view of the battery box provided in an embodiment of this utility model;

[0033] Figure 3 This is a structural schematic diagram of the box provided in an embodiment of the present utility model;

[0034] Figure 4 yes Figure 3 Enlarged view of point C in the middle;

[0035] Figure 5 This is a schematic diagram of the structure of the bracket provided in an embodiment of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Housing; 11. Supporting component; 12. Mounting slot; 13. Protrusion;

[0038] 2. Bracket; 21. Connector; 211. Main body; 2111. First side; 2112. Second side; 2113. Third side; 212. Snap-fit ​​part; 213. Groove; 214. Reinforcing rib;

[0039] 31. Positioning pin; 32. Positioning hole. Detailed Implementation

[0040] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0041] like Figures 1 to 5 As shown, this application embodiment provides a battery box. The battery box includes a box body 1 and a bracket 2. The box body 1 has a support member 11. A mounting groove 12 is formed on the support member 11. The bracket 2 overlaps the support member 11. The bracket 2 is provided with a connector 21. The connector 21 is snapped into the mounting groove 12.

[0042] In this embodiment, by constructing a connector 21 on the bracket 2, when the bracket 2 is attached to the support member 11 of the housing 1, the connector 21 is snapped into the mounting groove 12 of the support member 11. This enables rapid positioning and installation between the bracket 2 and the housing 1, allowing the positioning structure to simultaneously provide a fixing effect, simplifying the installation process and improving space utilization.

[0043] In some embodiments, the box body 1 is a plastic box body. The support member 11 is a skirt, flange or other structure integrally formed on the inner side of the box body 1, so as to form a stepped overlapping surface on the inner side of the box body 1 through the support member 11, thereby allowing the bracket 2 to be fixed at the opening position of the box body 1.

[0044] In some embodiments, the bracket 2 is a plastic bracket. The connector 21 is integrally injection molded with the bracket 2. The connector 21 may be disposed on the periphery of the bracket 2.

[0045] In some embodiments, if the mounting groove 12 is configured as a square groove, then the connector 21 is configured as a square structure so that the connector 21 can be snapped into the mounting groove 12.

[0046] In some embodiments, the connector 21 includes a main body 211 and a snap-fit ​​portion 212. The main body 211 is connected to the bracket 2. The snap-fit ​​portion 212 is connected to the main body 211. The snap-fit ​​portion 212 protrudes toward the support member 11 and snaps into the mounting groove 12.

[0047] It is understood that the snap-fit ​​part 212 is a recessed platform protruding from the main body part 211 toward the mounting groove 12. The recessed platform snaps into the mounting groove 12 of the support member 11 to achieve quick positioning and mutual fixation between the connector 21 and the mounting groove 12.

[0048] In some embodiments, the main body 211 and the snap-fit ​​part 212 are integrally injection molded, and the main body 211 and the bracket 2 are also integrally injection molded.

[0049] In some embodiments, the snap-fit ​​portion 212 is located at the middle of the main body portion 211. Based on the presence of the main body portion 211, the connector 21 can have good structural strength to prevent the connector 21 from breaking from the periphery of the bracket 2.

[0050] In some embodiments, the main body 211 is trapezoidal and the snap-fit ​​portion 212 is rectangular.

[0051] In some embodiments, the snap-fit ​​portion 212 is clearance-fitted with the mounting groove 12.

[0052] It is understandable that the snap-fit ​​part 212 is fitted with the mounting groove 12 with a clearance so that the snap-fit ​​part 212 can be snapped into the mounting groove 12, so that the bracket 2 and the housing 1 can be quickly positioned and fixed.

[0053] It should be noted that, based on the clearance fit between the snap-fit ​​part 212 and the mounting groove 12, the size of the snap-fit ​​part 212 is smaller than the size of the mounting groove 12. For example, the snap-fit ​​part 212 is set as a rectangle, the mounting groove 12 is set as a rectangular groove, the length of the snap-fit ​​part 212 is less than the length of the mounting groove 12, and the width of the snap-fit ​​part 212 is less than the width of the mounting groove 12.

[0054] In some embodiments, the distance between the snap-fit ​​portion 212 and the side wall of the mounting groove 12 is D1, which satisfies the following condition: 0.5 mm ≤ D1 ≤ 2 mm.

[0055] Understandably, the distance D1 between the snap-fit ​​part 212 and the side wall of the mounting groove 12 is set within the range of 0.5 mm to 2 mm to facilitate quick pre-positioning installation between the snap-fit ​​part 212 and the mounting groove 12. If the distance D1 between the snap-fit ​​part 212 and the side wall of the mounting groove 12 is less than 0.5 mm, interference may occur between the snap-fit ​​part 212 and the mounting groove 12 due to manufacturing tolerances, resulting in jamming or failure to engage. If the distance D1 between the snap-fit ​​part 212 and the side wall of the mounting groove 12 is greater than 2 mm, the pre-positioning effect between the snap-fit ​​part 212 and the mounting groove 12 will be poor, resulting in a larger installation error of the bracket 2.

[0056] For example, the distance D1 between the snap-fit ​​part 212 and the side wall of the mounting groove 12 is set to 0.5 mm, 1 mm, 1.5 mm, 2 mm, or any value between the two.

[0057] In some embodiments, one of the bottom surface of the snap-fit ​​portion 212 and the bottom surface of the mounting groove 12 is provided with a positioning post 31 extending toward the other, and the other is provided with a positioning hole 32, and the positioning post 31 is snapped into the positioning hole 32.

[0058] It is understandable that after the snap-fit ​​part 212 is pre-positioned with the mounting groove 12, secondary positioning can be performed through the cooperation of the positioning post 31 and the positioning hole 32, thereby improving the installation accuracy of the bracket 2.

[0059] In some embodiments, the bottom surface of the snap-fit ​​portion 212 is provided with a positioning hole 32, and the bottom surface of the mounting groove 12 is provided with a positioning post 31 protruding towards the snap-fit ​​portion 212. When the snap-fit ​​portion 212 is snapped into the mounting groove 12, the positioning post 31 also passes through the positioning hole 32 to achieve secondary positioning of the bracket 2 and improve the installation accuracy of the bracket 2. The positioning post 31 is integrally formed with the support member 11.

[0060] In some embodiments, the bottom surface of the snap-fit ​​portion 212 is provided with a positioning post 31 protruding towards the support member 11, and the bottom surface of the mounting groove 12 is formed with a positioning hole 32. When the snap-fit ​​portion 212 is snapped into the mounting groove 12, the positioning post 31 also passes through the positioning hole 32 to achieve secondary positioning of the bracket 2 and improve the installation accuracy of the bracket 2. The positioning post 31 and the snap-fit ​​portion 212 are integrally formed.

[0061] In some embodiments, the positioning pin 31 and the positioning hole 32 are clearance-fitted.

[0062] It is understandable that the positioning pin 31 and the positioning hole 32 are fitted with a clearance so that the positioning pin 31 can be locked in the positioning hole 32, so that the bracket 2 and the box 1 can be quickly positioned and fixed.

[0063] It should be noted that, based on the clearance fit between the positioning pin 31 and the positioning hole 32, the size of the positioning pin 31 is smaller than the size of the positioning hole 32. For example, the positioning pin 31 is cylindrical, the positioning hole 32 is circular, and the diameter of the positioning pin 31 is smaller than the diameter of the positioning hole 32.

[0064] In some embodiments, the distance between the positioning post 31 and the wall of the positioning hole 32 is D2, which satisfies: 0.075 mm ≤ D2 ≤ 0.225 mm.

[0065] It is understandable that the distance D2 between the positioning post 31 and the wall surface of the positioning hole 32 is set within the range of 0.075 mm to 0.225 mm to facilitate quick pre-positioning installation between the positioning post 31 and the positioning hole 32. If the distance D2 between the positioning post 31 and the wall surface of the positioning hole 32 is less than 0.075 mm, interference may occur between the positioning post 31 and the positioning hole 32 due to manufacturing tolerances, resulting in jamming or failure to engage. If the distance D2 between the positioning post 31 and the wall surface of the positioning hole 32 is greater than 0.225 mm, the secondary positioning effect between the positioning post 31 and the positioning hole 32 will be poor, resulting in a larger installation error for the bracket 2.

[0066] For example, the distance D2 between the positioning post 31 and the wall of the positioning hole 32 can be set to 0.075 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.225 mm, or any value between the two.

[0067] In some embodiments, the height of the positioning post 31 is H1, and the groove depth of the mounting groove 12 is H2, satisfying: H1≤H2.

[0068] It is understandable that, based on the principle that the height H1 of the positioning post 31 is less than or equal to the groove depth H2 of the mounting groove 12, the bracket 2 and the housing 1 will first achieve pre-positioning through the cooperation of the snap-fit ​​part 212 and the mounting groove 12, and then achieve secondary positioning through the cooperation of the positioning post 31 and the positioning hole 32, thereby improving the installation accuracy of the bracket 2.

[0069] In some embodiments, the height H1 of the positioning post 31 is less than the groove depth H2 of the mounting groove 12. After the snap-fit ​​part 212 snaps into the mounting groove 12, there is still a certain distance between the positioning post 31 and the positioning hole 32 on the snap-fit ​​part 212. Thus, it is ensured that the snap-fit ​​part 212 first snaps into the mounting groove 12 to achieve pre-positioning, and then the positioning post 31 and the positioning hole 32 achieve secondary positioning through snap-fit ​​cooperation.

[0070] In some embodiments, the height H1 of the positioning post 31 is equal to the groove depth H2 of the mounting groove 12. After the snap-fit ​​part 212 snaps into the mounting groove 12, the positioning post 31 can also be connected to the positioning hole 32 on the snap-fit ​​part 212. This can speed up the secondary positioning process.

[0071] In some embodiments, the main body 211 and the snap-fit ​​portion 212 form a groove 213 on the side away from the mounting groove 12, and a reinforcing rib 214 is provided in the groove 213.

[0072] Understandably, by forming a groove 213 on the side of the main body 211 and the snap-fit ​​part 212 away from the mounting groove 12, the thickness of the snap-fit ​​part 212 can be reduced, allowing the snap-fit ​​part 212 and the main body 211 to form a recessed structure. This allows the thickness of the snap-fit ​​part 212 to be the same as the thickness of the main body 211, facilitating injection molding of both.

[0073] The reinforcing rib 214 within the groove 213 provides structural reinforcement to the main body 211 and the snap-fit ​​part 212, ensuring the overall strength of the connector 21. The reinforcing rib 214 is offset from the positioning hole 32 / positioning post 31.

[0074] In some embodiments, the reinforcing rib 214, the snap-fit ​​portion 212, and the main body portion 211 are integrally formed.

[0075] In some embodiments, the reinforcing rib 214 is configured as a T-shape.

[0076] In some embodiments, the reinforcing rib 214 is flush with the surface of the bracket 2.

[0077] Understandably, aligning the reinforcing rib 214 flush with the upper surface of the bracket 2 saves space above the connector 21, offering advantages for the layout above the connector 21. When applied to a battery pack, this results in a lower overall pack size and a more compact structure.

[0078] In some embodiments, the main body 211 includes a first side 2111 spaced apart from the bracket 2, and a second side 2112 connected to one end of the first side 2111. The second side 2112 is inclined in a direction away from the axis of the main body 211 and is connected to the bracket 2. The included angle between the second side 2112 and the first side 2111 is A, which satisfies: 135°≤A≤160°.

[0079] Understandably, by setting the second side 2112 of the main body 211 as a slope, the area of ​​the main body 211 can be increased, allowing for more material usage and greater strength, thus further ensuring the structural strength of the connector 21. The included angle A between the second side 2112 and the first side 2111 is set within the range of 135° to 160° to ensure that the connector 21 has sufficient strength without wasting raw materials or affecting the overall assembly of the connector 21. When the included angle A between the second side 2112 and the first side 2111 is less than 135°, it will result in insufficient material usage for the main body 211, leading to insufficient structural strength of the connector 21 and failing to meet usage requirements. When the included angle A between the second side 2112 and the first side 2111 is greater than 160°, it will cause waste of raw materials and affect the assembly of the connector 21 or other components, causing interference when other components are connected to the bracket 2.

[0080] For example, the included angle A between the second side 2112 and the first side 2111 can be set to 135°, 150°, 160°, or any value between the two.

[0081] In some embodiments, the first side 2111 is arranged parallel to the edge of the bracket 2.

[0082] In some embodiments, the main body 211 further includes a third side 2113 connected to the other end of the first side 2111. The third side 2113 is inclined in a direction away from the axis of the main body 211 and is connected to the bracket 2. The included angle between the third side 2113 and the first side 2111 is B, which satisfies: 135°≤B≤160°.

[0083] Understandably, by setting the third side 2113 of the main body 211 as a slope, the area of ​​the main body 211 can be increased, allowing for more material usage and greater strength, thus further ensuring the structural strength of the connector 21. The included angle B between the third side 2113 and the first side 2111 is set within the range of 135° to 160° to ensure that the connector 21 has sufficient strength without wasting raw materials or affecting the overall assembly of the connector 21. When the included angle B between the third side 2113 and the first side 2111 is less than 135°, it will result in insufficient material usage for the main body 211, leading to insufficient structural strength of the connector 21 and failing to meet usage requirements. When the included angle B between the third side 2113 and the first side 2111 is greater than 160°, it will cause waste of raw materials and affect the assembly of the connector 21 or other components, causing interference when other components are connected to the bracket 2.

[0084] For example, the included angle B between the third side 2113 and the first side 2111 can be set to 135°, 150°, 160°, or any value between the two.

[0085] In some embodiments, an adhesive layer is provided between the snap-fit ​​portion 212 and the groove wall surface of the mounting groove 12.

[0086] It is understandable that an adhesive layer is used to bond the snap-fit ​​part 212 to the groove wall of the mounting groove 12 so that after the snap-fit ​​part 212 snaps into the mounting groove 12, the two can form a stable and reliable connection, so that the two can be positioned and reliably fixed at the same time.

[0087] In some embodiments, the adhesive layer is formed by the curing of glue. Before the snap-fit ​​part 212 is snapped into the mounting groove 12, a certain amount of glue is injected into the mounting groove 12, and then the bracket 2 is installed so that the snap-fit ​​part 212 is snapped into the mounting groove 12, thereby achieving the required adhesion between the snap-fit ​​part 212 and the bottom surface of the mounting groove 12.

[0088] It should be noted that the groove wall of the mounting groove 12 includes the side wall of the mounting groove 12 and the bottom surface of the mounting groove 12.

[0089] In some embodiments, at least two connectors 21 are provided, and the at least two connectors 21 are spaced apart along the periphery of the bracket 2. The mounting grooves 12 correspond one-to-one with the connectors 21.

[0090] It is understandable that by setting at least two connectors 21 and at least two mounting slots 12 to interlock with each other, the reliability of the fixation between the bracket 2 and the housing 1 is improved, thereby increasing the connection strength between the bracket 2 and the housing 1 and ensuring that the bracket 2 can be reliably fixed to the housing 1.

[0091] It should be noted that the one-to-one correspondence between the mounting groove 12 and the connector 21 means that the bracket 2 has a mounting groove 12 corresponding to the position where the connector 21 is located. Along the height direction, the projection of the mounting groove 12 covers the corresponding connector 21.

[0092] For example, three connectors 21 are provided, and the three connectors 21 are spaced apart along the periphery of the bracket 2. Correspondingly, three mounting slots 12 are also provided at intervals on the support member 11.

[0093] In some embodiments, at least two connectors 21 are distributed non-centrally symmetrically on the bracket 2.

[0094] It is understandable that, based on the fact that at least two connectors 21 are distributed non-centrally symmetrically on the bracket 2, the bracket 2 can have the function of preventing mistaken installation by cooperating with at least two mounting slots 12, thus preventing the bracket 2 from being installed incorrectly and affecting the subsequent installation of components such as aluminum strips.

[0095] For example, there are three connectors 21. One connector 21 is located on one side of the bracket 2, and the other two connectors 21 are located on the other side of the bracket 2.

[0096] In some embodiments, the side wall of the mounting groove 12 is provided with a protrusion 13. The protrusion 13 abuts against the connector 21.

[0097] It is understandable that by providing a protrusion 13 on the side wall of the mounting groove 12 to abut against the connector 21, the protrusion 13 can limit the connector 21 and provide a certain guiding installation effect.

[0098] In some embodiments, the protrusion 13 is integrally formed on the support member 11.

[0099] In some embodiments, each mounting groove 12 is provided with two protrusions 13, the two protrusions 13 are located on the side wall of the same side of the mounting groove 12, and the two protrusions 13 are spaced apart.

[0100] In some embodiments, the protrusion 13 is inclined away from the side wall of the mounting groove 12 along the direction from the opening of the groove to the bottom of the groove.

[0101] It is understandable that the protrusion 13, which is set at an angle, can guide the connector 21, and as the connector 21 is installed downward, the gap between the protrusion 13 and the connector 21 will gradually decrease, so as to improve the installation accuracy of the bracket 2.

[0102] In some embodiments, the tilt angle of the protrusion 13 is set to 1°, 3°, 5°, or any value between the two. Alternatively, the tilt angle of the protrusion 13 can be set to 10° or a larger value, ensuring that the protrusion 13 can be integrally formed on the side wall of the mounting groove 12 and can limit and guide the connector 21.

[0103] This application also provides a battery pack. The battery pack includes a battery module and a battery case as described in the previous embodiments. The battery module is disposed within the case 1.

[0104] In this embodiment, by constructing a connector 21 on the bracket 2, when the bracket 2 is attached to the support member 11 of the housing 1, the connector 21 is snapped into the mounting groove 12 of the support member 11. This enables rapid positioning and installation between the bracket 2 and the housing 1, allowing the positioning structure to simultaneously provide a fixing effect, simplifying the installation process and improving space utilization.

[0105] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery box characterized by, include: The housing has internal support members, and the support members have mounting grooves formed on them; The bracket is attached to the support member, and the bracket is provided with a connector that is snapped into the mounting groove.

2. The battery pack of claim 1, wherein, The connector includes: The main body is connected to the bracket; The snap-fit ​​part is connected to the main body part, and the snap-fit ​​part protrudes toward the support member and snaps into the mounting groove.

3. The battery pack of claim 2, wherein, The snap-fit ​​portion fits with the mounting groove with a clearance.

4. The battery pack of claim 3, wherein, The distance between the snap-fit ​​part and the side wall of the mounting groove is D1, which satisfies the following condition: 0.5 mm ≤ D1 ≤ 2 mm.

5. The battery pack of claim 2, wherein, One of the bottom surface of the snap-fit ​​part and the bottom surface of the mounting groove is provided with a positioning post extending in the direction of the other, and the other is provided with a positioning hole, wherein the positioning post is snapped into the positioning hole.

6. The battery pack of claim 5, wherein, The positioning pin and the positioning hole are fitted with a clearance.

7. The battery box according to claim 6, characterized in that, The distance between the positioning post and the wall of the positioning hole is D2, which satisfies: 0.075 mm ≤ D2 ≤ 0.225 mm.

8. The battery box according to claim 5, characterized in that, The height of the positioning post is H1, and the depth of the mounting groove is H2, satisfying: H1≤H2.

9. The battery box according to claim 2, characterized in that, The main body and the snap-fit ​​part form a groove on the side away from the mounting groove, and the groove is provided with reinforcing ribs.

10. The battery box according to claim 9, characterized in that, The reinforcing rib is flush with the surface of the bracket.

11. The battery box according to claim 2, characterized in that, The main body includes a first side spaced apart from the bracket, and a second side connected to one end of the first side. The second side is inclined in a direction away from the axis of the main body and is connected to the bracket. The included angle between the second side and the first side is A, which satisfies: 135°≤A≤160°.

12. The battery box according to claim 11, characterized in that, The main body also includes a third side connected to the other end of the first side. The third side is inclined in a direction away from the axis of the main body and is connected to the bracket. The included angle between the third side and the first side is B, which satisfies: 135°≤B≤160°.

13. The battery box according to claim 2, characterized in that, An adhesive layer is provided between the snap-fit ​​part and the wall surface of the mounting groove.

14. The battery box according to any one of claims 1 to 13, characterized in that, The connector is provided in at least two parts, and the at least two connectors are arranged at intervals along the periphery of the bracket, wherein the mounting groove corresponds one-to-one with the connector.

15. The battery box according to claim 14, characterized in that, At least two of the connectors are distributed non-centrally symmetrically on the bracket.

16. The battery box according to any one of claims 1 to 13, characterized in that, The side wall of the mounting groove has a protrusion, which abuts against the connector.

17. The battery box according to claim 16, characterized in that, Along the direction from the opening of the mounting groove to the bottom of the groove, the protrusion is inclined away from the side wall of the mounting groove.

18. A battery pack, characterized in that, include: The battery box as described in any one of claims 1 to 17; The battery module is housed within the casing.

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