Box cover locking structure and battery pack

Abstract

The application relates to the battery technical field and discloses a box cover locking structure and a battery pack. The box cover locking structure comprises a box body, a box cover, a clamping piece and an abutting piece. The box body is provided with a mounting port, and a limiting protrusion and a stopper are arranged at the outer side wall of the box body at the end corresponding to the mounting port, and a locking space is defined between the limiting protrusion and the stopper. The box cover is arranged on the mounting port, the clamping piece clamps the limiting protrusion and the box cover, and the abutting piece is arranged in the locking space, one side of the abutting piece abuts against the stopper, and the other side of the abutting piece abuts against the clamping piece, so that the clamping piece is locked to the limiting protrusion. The box cover locking structure provided by the application can simplify the assembly process, improve the production efficiency and reduce the maintenance cost through the cooperation of the limiting piece and the stopper and the cooperative locking of the clamping piece and the abutting piece.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a lid locking structure and a battery pack. Background Technology

[0002] Currently, most battery pack cover locking solutions use a screw-locking structure. Specifically, by setting several threaded holes on the side wall of the case and the edge of the cover, screws are used to fasten the cover to the case, and a sealing gasket is placed between the mating surfaces of the cover and the case to achieve a seal.

[0003] However, as battery packs become larger and have higher energy density, their size and weight are constantly increasing. Traditional screw-fastening methods require a large number of screws to ensure the locking force and sealing effect of the cover. As the size of the battery pack increases, the number of screws required also increases, leading to cumbersome assembly processes and low production efficiency. At the same time, during later maintenance or disassembly, removing and re-tightening a large number of screws is also time-consuming and labor-intensive, increasing maintenance costs. Summary of the Invention

[0004] The embodiments of the present invention provide a case cover locking structure and a battery pack. The case cover locking structure, through the cooperation of limiting members and stopping members, combined with the coordinated locking of clamping members and abutting members, can simplify the assembly process, improve production efficiency and reduce maintenance costs.

[0005] In a first aspect, embodiments of this application provide a box cover locking structure, including: a box body having an installation opening, and at the end of the box body corresponding to the installation opening, a limiting protrusion and a stop are provided at intervals on the outer side wall of the box body, and a locking space is defined between the limiting protrusion and the stop. A lid is fitted over the mounting opening; Clamping components, which clamp the limiting protrusion and the box cover; An abutment is provided in the locking space. One side of the abutment abuts against the stop and the other side of the abutment abuts against the clamping member to lock the clamping member to the limiting protrusion.

[0006] In one embodiment, the limiting protrusion has a first side and a second side disposed opposite to each other in the direction perpendicular to the cover, the first side being away from the stop and the second side being close to the stop; the portion of the first side of the limiting protrusion near the mounting opening is recessed in the direction perpendicular to the cover to form a limiting step; The lid locking structure also includes a seal, which is clamped between the limiting step and the lid.

[0007] By clamping the sealing element with the limiting step on the limiting protrusion, it is ensured that the sealing element is uniformly compressed to form a reliable seal, and the main body of the limiting protrusion is used to limit the amount of compression to prevent the sealing element from failing due to excessive compression.

[0008] In one embodiment, the ratio of the height of the limiting step to the height of the seal is between 0.2 and 0.8 in the direction perpendicular to the lid.

[0009] The height of the sealing element is greater than the height of the limiting step, which can provide a variable clamping force when the clamping element clamps the limiting protrusion and the box cover, making it easier for the clamping element to clamp the limiting protrusion and the box cover.

[0010] In one embodiment, on a plane parallel to the lid, the dimension of the seal along the mounting opening in the direction away from the mounting opening is between 17mm and 23mm. And / or, on a plane parallel to the cover, the dimension of the plane supporting the seal on the limiting step along the mounting opening in the direction away from the mounting opening is between 19mm and 25mm.

[0011] The width of the plane supporting the seal is greater than the width of the seal. This ensures that the seal is placed completely in the sealing clamp and provides sufficient space for the seal's error displacement without causing dimensional redundancy.

[0012] In one embodiment, the clamping member includes a clamping portion and a locking portion connected together, the clamping portion being used to clamp the limiting protrusion and the lid; The outer wall of the housing includes a limiting part and a blocking part. The limiting part has a limiting protrusion, and the blocking part is located on the side of the limiting protrusion away from the mounting opening. The stop and the blocking part are arranged opposite to each other in the direction of the mounting opening toward the limiting protrusion. When the clamping part holds the lid against the limiting protrusion, the locking part is located in the locking space and is set to fit the blocking part; one side of the abutting part abuts against the locking part, and the other side of the abutting part abuts against the stop.

[0013] The clamping and locking parts of the clamping component work together. After the clamping part clamps the lid, the locking part naturally falls into the locking space and fits against the blocking part, providing a stable abutment surface for the abutment component. This ensures that the clamping component is reliably locked in both the radial direction of the installation opening and the direction perpendicular to the lid, effectively preventing loosening.

[0014] In one embodiment, the clamping part includes a bottom wall and a third side wall and a fourth side wall connected to opposite sides of the bottom wall. The bottom wall is located on the side of the limiting protrusion away from the mounting opening. Along the direction perpendicular to the cover, the third side wall and the fourth side wall are located on both sides of the limiting protrusion. The third side wall abuts against the first side of the limiting protrusion, and the inner surface of the fourth side wall is inclined from the bottom wall toward the direction close to the limiting protrusion. The surface of the second side is inclined and adapted to the inner surface of the fourth side wall.

[0015] The third and fourth side walls limit the two sides of the limiting protrusion in a direction perpendicular to the lid, and the inclined mating surface guides the clamping part to slide in smoothly, achieving rapid positioning.

[0016] In one embodiment, the slope of the inner surface of the fourth sidewall is less than the slope of the surface of the second side of the limiting protrusion.

[0017] As the limiting protrusion extends into the clamping part, since the slope of the inner surface of the fourth sidewall is less than the slope of the surface of the second side of the limiting protrusion, the fourth sidewall can clamp the limiting protrusion with the third sidewall.

[0018] In one embodiment, the housing is made of aluminum alloy, and the seal is made of silicone or foam.

[0019] Based on the limitation that the slope of the inner surface of the fourth side wall is less than the slope of the surface of the second side of the limiting protrusion, the materials of the housing and the seal are limited so that when the clamping part holds the limiting protrusion and the housing cover, the seal can provide a variable dimensional allowance for the clamping part to clamp the limiting protrusion.

[0020] In one embodiment, the thickness of the portion of the limiting protrusion near the bottom wall is greater than the thickness of the portion away from the bottom wall along the direction from the bottom wall, so that the clamping part clamps the limiting protrusion.

[0021] By creating a gradually thicker inner and thinner outer structure for the limiting protrusion, the clamping part is guided to be gradually tightened during installation, thereby achieving a progressive clamping effect that becomes increasingly firm towards the inside. In one embodiment, the abutting member includes a bent structure with an abutting interface. The bent structure includes a first abutting wall and a second and a third abutting wall connected to opposite sides of the first abutting wall. The first abutting wall is disposed opposite to the abutting interface, and the abutting interface is disposed away from the installation opening relative to the first abutting wall. The first abutting wall abuts against the blocking part, the end of the second abutting wall away from the first abutting wall abuts against the stop member, and the side of the third abutting wall away from the second abutting wall abuts against the fourth side wall of the clamping part in a direction perpendicular to the cover.

[0022] By abutting the first abutting wall against the blocking part, the second abutting wall against the stop part, and the third abutting wall against the fourth side wall of the clamping part, force is applied in three directions to lock the clamping part onto the limiting protrusion, effectively preventing the clamping part from loosening in the radial direction of the mounting opening and in the direction perpendicular to the box cover.

[0023] In one embodiment, the outer surface of the fourth sidewall is parallel to the inner surface of the fourth sidewall, and the shape of the outer surface of the third abutting wall is adapted to the shape of the outer surface of the fourth sidewall.

[0024] By adapting the outer surface of the third abutment wall to the outer surface of the fourth side wall, the contact area between the two is increased, the abutment force is distributed more evenly, local stress concentration is avoided, and the stability and durability of locking are improved.

[0025] In one embodiment, the length of the stop member along the direction perpendicular to the box cover is H1; The thickness of the stopper in the direction towards the mounting opening is T1, where T1 satisfies: 1mm≤T1≤10mm, 1mm≤H1 / T1≤10mm; and / or, the length of the blocking portion in the direction perpendicular to the box cover is H2, where H2 satisfies: 1mm<H2 / H1<10mm.

[0026] Defining the thickness of the stopper in the direction towards the mounting opening is to ensure the stopper has sufficient strength, and defining the length of the stopper along the direction of the box cover is to enable the stopper to have elastic deformation capability, so as to temporarily yield when the abutting piece abuts against the locking space, and rebound to lock in place after being in position.

[0027] In one embodiment, the top end surface of the stopper is arranged to be inclined from the inner side wall of the stopper to the outer side wall of the stopper, and in the direction perpendicular to the box cover, the height of the inner side wall of the stopper is greater than the height of the outer side wall of the stopper, and the abutting piece abuts against the inner side wall of the stopper.

[0028] By arranging the top end surface of the stopper as an inclined surface that is high on the inner side and low on the outer side, the abutting piece can smoothly slide into the locking space along the inclined surface when locked in the locking space, and the protruding height of the inner side wall is utilized to provide reliable abutting limit for the abutting piece, which not only ensures the convenience of assembly, but also ensures the stability of locking.

[0029] In one embodiment, the end of the abutting piece that abuts against the stopper is provided with a notch, the abutting piece has a locking wall and a disassembly and assembly wall at the position of the notch, the stopper abuts against the locking wall along the radial direction of the mounting opening, and the stopper abuts against the disassembly and assembly wall along the direction perpendicular to the box cover.

[0030] The abutting piece forms the locking wall and the disassembly and assembly wall through the notch, so that the stopper abuts against the locking wall in the radial direction of the mounting opening and abuts against the disassembly and assembly wall in the direction perpendicular to the box cover, jointly restricting the displacement of the abutting piece from two directions, realizing double locking and effectively preventing loosening and detachment.

[0031] In one embodiment, the locking wall is spaced apart from the top end surface of the stopper to define a movable space, and the movable space allows a prying device to extend in to pry the abutting piece.

[0032] By reserving a movable space between the locking wall and the top end surface of the stopper, an operation entrance is provided for the prying device, the abutting piece can be easily pried without using other disassembly tools, and the disassembly and assembly convenience and maintenance efficiency are significantly improved.

[0033] In one embodiment, along the direction perpendicular to the box cover, the length of the locking wall is H3, where H3 satisfies: 0.5mm≤H3≤5mm.

[0034] By controlling the length of the locking wall within the range of 0.5mm to 5mm, sufficient abutting area between the locking wall and the stopper is ensured, and loosening and detachment are effectively prevented.

[0035] In one embodiment, the housing is provided with multiple sets of limiting protrusions and stops around the mounting opening, and at least one set of limiting protrusions and stops is provided with clamping members and abutment members respectively; At least two sets of limiting protrusions and stops are located on opposite sides of the mounting opening.

[0036] By setting multiple sets of limiting protrusions and stoppers on the box body, and correspondingly configuring clamping and abutment parts, the box cover can be locked in multiple positions at the same time, ensuring the reliability of locking; at least two sets are located on opposite sides of the mounting opening, realizing multi-point fixation of the box cover, further enhancing the stability of locking.

[0037] Secondly, embodiments of the present invention provide a battery pack, the battery pack including a battery and a cover locking structure of the first aspect, wherein the battery is installed in the housing of the cover locking structure.

[0038] Applying the first aspect of the cover locking structure to the battery pack enables quick disassembly and reliable locking of the cover, significantly improving the assembly efficiency of the battery pack and the convenience of subsequent maintenance.

[0039] The beneficial effects of the embodiments of the present invention are as follows: This application provides a lid locking structure and a battery pack. A limiting protrusion and a stop member spaced apart from it are provided at the end of the box body, defining a locking space between them. A clamping member holds the limiting protrusion and the lid. An abutment member is located within the locking space, with one side abutting against the stop member and the other side abutting against the clamping member, locking the clamping member onto the limiting protrusion and effectively preventing the clamping member from loosening. Compared with related technologies, this application, through the cooperative layout of the limiting protrusion and the stop member, combined with the coordinated locking of the clamping member and the abutment member, significantly reduces the number of parts, simplifies the assembly process, and greatly improves production efficiency and the convenience of later maintenance. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a cross-sectional view of the battery pack provided in an embodiment of the present invention; Figure 2 yes Figure 1 An enlarged view of the box locking structure shown in section A; Figure 3 This is a perspective view of the box provided in an embodiment of the present invention; Figure 4This is a front view of one of the side walls of the housing provided in an embodiment of the present invention; Figure 5 This is a perspective view of the clamping member and the abutment member provided in an embodiment of the present invention; Figure 6 This is a front view of the clamping member provided in an embodiment of the present invention; Figure 7 This is a front view of the abutment member provided in an embodiment of the present invention; Figure 8 This is a perspective view of a battery pack provided in an embodiment of the present invention.

[0042] Attached diagram label: 100, lid locking structure. 110. Housing; 111. Mounting port; 112. Limiting protrusion; 1121. First side; 1122. Second side; 1123. Limiting step; 113. Stop; 1131. Top surface; 114. Locking space; 115. Blocking part. 120. Box lid; 130. Clamping element; 131. Clamping part; 1311. Bottom wall; 1312. Third side wall; 1313. Fourth side wall; 132. Locking part; 140. Abutting component; 141. Bending structure; 142. Abutting interface; 143. First abutting wall; 144. Second abutting wall; 145. Third abutting wall; 146. Notch; 1461. Locking wall; 1462. Disassembly wall. 150. Sealing components; 160. Activity space 200. Battery pack. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, 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.

[0044] Self-locking angle: When an object is on an inclined plane or subjected to an external force, if the angle between the direction of the resultant force on the object and the normal to the contact surface is less than or equal to the friction angle between the contact surfaces, then the object will not slide relative to the contact surface regardless of the normal force applied. This phenomenon is called self-locking. This critical angle is the self-locking angle.

[0045] An embodiment of this application provides a box lid locking structure; please refer to... Figure 1 and Figure 2 The lid locking structure 100 includes a box body 110, a lid 120, a clamping member 130, and an abutment member 140.

[0046] Combined Figure 3 and Figure 5 The housing 110 has a mounting opening 111. At the end of the housing 110 corresponding to the mounting opening 111, a limiting protrusion 112 and a stop 113 are provided at intervals on the outer side wall of the housing 110. A locking space 114 is defined between the limiting protrusion 112 and the stop 113. The housing cover 120 is placed over the mounting opening 111. The clamping member 130 clamps the limiting protrusion 112 and the housing cover 120. The abutment member 140 is disposed in the locking space 114. One side of the abutment member 140 abuts against the stop 113, and the other side of the abutment member 140 abuts against the clamping member 130 to lock the clamping member 130 to the limiting protrusion 112.

[0047] This application provides a lid locking structure 100 and a battery pack 200. A limiting protrusion 112 and stop members 113 spaced apart at the end of the housing 110 form a locking space 114. A clamping member 130 clamps the limiting protrusion 112 and the lid 120. An abutment member 140 is housed within the locking space 114, with one side abutting against the stop member 113 and the other side abutting against the clamping member 130, thereby locking the clamping member 130 onto the limiting protrusion 112 to prevent it from loosening. Compared to existing technologies, this application effectively reduces the number of parts and simplifies the assembly process by optimizing the relative arrangement of the limiting protrusion 112 and the stop member 113, and utilizing the linkage locking of the clamping member 130 and the abutment member 140, thus significantly improving the efficiency of production assembly and subsequent maintenance.

[0048] In some embodiments of this application, such as Figure 4 The limiting protrusions 112 and the stop members 113 are arranged at intervals along a direction perpendicular to the box cover 120.

[0049] In some embodiments of this application, such as Figure 3 and Figure 4The limiting protrusion 112 has a first side 1121 and a second side 1122 disposed opposite to each other in the direction perpendicular to the cover 120. The first side 1121 is away from the stop member 113, and the second side 1122 is close to the stop member 113. The portion of the first side 1121 of the limiting protrusion 112 near the mounting opening 111 is recessed in the direction perpendicular to the cover 120 to form a limiting step 1123. Figure 2 The lid locking structure 100 also includes a seal 150, which is sandwiched between the limiting step 1123 and the lid 120.

[0050] By providing a limiting step 1123 on the limiting protrusion 112, the seal 150 is sandwiched between the limiting step 1123 and the cover 120, achieving precise positioning and uniform compression of the seal 150, thus ensuring the reliability of the seal. Simultaneously, the portion of the first side 1121 of the limiting protrusion 112 away from the mounting opening 111 is not recessed. The cover 120 and the limiting step 1123 limit the maximum compression of the seal 150 in the direction perpendicular to the cover 120, effectively preventing plastic deformation or damage to the seal 150 due to excessive compression, and extending the service life of the seal 150. More specifically, when the cover 120 is placed over the mounting opening 111, it overlaps the unrecessed portion of the first side 1121 of the limiting protrusion 112, thus working together with the limiting step 1123 to limit the maximum compression of the seal 150.

[0051] Furthermore, the lid locking structure 100 abandons the traditional screw fastening method, avoiding localized stress concentration on the seal 150 during screw tightening. This results in more even stress distribution on the seal 150, further reducing the risk of cracking due to stress concentration. Common materials for the seal 150 include silicone foam, EPDM rubber, or polyurethane foam. All three materials used in the seal 150 exhibit excellent compression resilience, weather resistance, and resistance to compressive deformation.

[0052] In the embodiments of this application, the sealing element 150 is arranged around the box body 110, and the box cover 120 is always pressed against the sealing element 150.

[0053] In some embodiments of this application, such as Figure 2 As shown, the ratio of the height of the limiting step 1123 to the height of the seal 150 is between 0.2 and 0.8.

[0054] By limiting the height of the seal 150 to be greater than the height of the limiting step 1123, the seal 150 can be pre-compressed and elastically deformed during the process of the clamping member 130 simultaneously clamping the limiting protrusion 112 and the cover 120. This provides the clamping member 130 with a progressive clamping force that varies with the installation stroke. This not only compensates for dimensional tolerances but also helps the clamping member 130 to clamp the limiting protrusion 112 and the cover 120 more reliably and smoothly.

[0055] In some embodiments of this application, such as Figure 2 As shown, on a plane parallel to the cover 120, the dimension of the seal 150 along the mounting opening 111 in the direction away from the mounting opening 111 is between 17mm and 23mm. On a plane parallel to the cover 120, the dimension of the plane of the limiting step 1123 supporting the seal 150 along the mounting opening 111 in the direction away from the mounting opening 111 is between 19mm and 25mm.

[0056] By setting the width of the plane on the limiting step 1123 that supports the seal 150 to be greater than the width of the seal 150 itself, on the one hand, it can ensure that the seal 150 is placed intact and stably on the limiting step 1123, avoiding the seal 150 being suspended or misaligned due to insufficient width; on the other hand, this width difference provides sufficient space to accommodate and compensate for manufacturing errors, assembly offsets or compression deformation that may occur during the installation or use of the seal 150, so that the seal 150 can adaptively adjust its position within a certain range, while the width dimension will not exceed the required range, avoiding structural waste or movement of the seal 150 due to excessive size redundancy.

[0057] In addition, such as Figure 4 The limiting step 1123 includes an inclined ramp. The ramp can reduce the stress concentration effect at the junction of the two platforms and improve the structural strength of the limiting step 1123.

[0058] In some embodiments of this application, such as Figure 2 , Figure 4 and Figure 6The clamping member 130 includes a clamping portion 131 and a locking portion 132 connected together. The clamping portion 131 is used to clamp the limiting protrusion 112 and the lid 120. The outer wall of the housing 110 includes a limiting portion and a blocking portion 115. The limiting portion has a limiting protrusion 112, and the blocking portion 115 is located on the side of the limiting protrusion 112 facing away from the mounting opening 111. The stop member 113 is disposed opposite to the blocking portion 115 in the direction of the mounting opening 111 toward the limiting protrusion 112. When the clamping portion 131 clamps the lid 120 to the limiting protrusion 112, the locking portion 132 is located in the locking space 114 and is disposed in abutment against the blocking portion 115. One side of the abutment member 140 abuts against the locking portion 132, and the other side of the abutment member 140 abuts against the stop member 113.

[0059] By having the clamping part 131 and the locking part 132 of the clamping member 130 work together, after the clamping part 131 clamps the lid 120, the locking part 132 naturally falls into the locking space 114 and fits against the blocking part 115, providing a stable abutment surface for the abutment member 140. This ensures that the clamping member 130 is reliably locked in both the radial direction of the mounting opening 111 and the direction perpendicular to the lid 120, effectively preventing loosening. This structural design makes full use of the spatial positional relationship of the locking space 114, decomposing the locking function of the clamping member 130 into two independent yet coordinated links: clamping and locking. This ensures the reliable clamping of the lid 120 by the clamping member 130, and through the bidirectional limiting of the locking part 132 by the abutment member 140, it achieves constraint of the clamping member 130 in multiple degrees of freedom, thereby significantly improving the overall stability and vibration resistance of the locking structure.

[0060] In some embodiments of this application, such as Figure 2 and Figure 6 The clamping part 131 includes a bottom wall 1311 and a third side wall 1312 and a fourth side wall 1313 connected to opposite sides of the bottom wall 1311. The bottom wall 1311 is located on the side of the limiting protrusion 112 away from the mounting opening 111 and along the direction perpendicular to the cover 120. The third side wall 1312 and the fourth side wall 1313 are located on both sides of the limiting protrusion 112. The third side wall 1312 abuts against the first side 1121 of the limiting protrusion 112, and the inner surface of the fourth side wall 1313 is inclined from the bottom wall 1311 toward the direction close to the limiting protrusion 112. The surface of the second side 1122 is inclined and adapted to the inner surface of the fourth side wall 1313.

[0061] It is worth noting that, for example Figure 6 The inner surface of the third side wall 1312 is perpendicular to the bottom wall 1311, which makes it convenient for the clamping part 131 to clamp the box cover 120 with the third side wall 1312 and prevent the box cover 120 from falling off.

[0062] The third sidewall 1312 and the fourth sidewall 1313 respectively limit the two sides of the limiting protrusion 112 in a direction perpendicular to the cover 120, and the inclined mating surface guides the clamping part 131 to slide smoothly in, achieving rapid positioning. This structural design makes full use of the guiding effect of the inclined mating surface, so that the clamping part 131 can automatically slide into the predetermined position without precise alignment during installation, which simplifies the assembly operation and avoids installation difficulties caused by jamming, thereby significantly improving assembly efficiency.

[0063] In some embodiments of this application, such as Figure 2 , Figure 4 and Figure 6 As shown, the inner surface of the fourth sidewall 1313 is arranged parallel to the second side 1122 of the limiting protrusion 112. This facilitates guiding the fourth sidewall 1313 to smoothly slide into the predetermined position along the second side 1122.

[0064] In some embodiments of this application, the slope of the inner surface of the fourth sidewall 1313 is less than the slope of the surface of the second side 1122 of the limiting protrusion 112. More specifically, the slope of the inner surface of the fourth sidewall 1313 needs to be less than the self-locking angle.

[0065] By making the slope of the inner surface of the fourth sidewall 1313 less than the slope of the surface of the second side 1122 of the limiting protrusion 112, a gradually narrowing guide channel is formed when the clamping part 131 slides in, so that the clamping part 131 can be smoothly introduced; as the sliding depth increases, the gap between the fourth sidewall 1313 and the limiting protrusion 112 gradually decreases. After it is in place, the fourth sidewall 1313 and the third sidewall 1312 jointly apply a stable clamping force to the limiting protrusion 112, thereby achieving a reliable fit of guiding first and then clamping.

[0066] In some embodiments of this application, the housing 110 is made of aluminum alloy, and the sealing element 150 is made of silicone or foam.

[0067] Based on the fact that the slope of the inner surface of the fourth side wall 1313 is already limited to be less than the slope of the surface of the second side 1122 of the limiting protrusion 112, the specific materials of the housing 110 and the seal 150 are further defined, so that when the clamping part 131 clamps the limiting protrusion 112 and the housing cover 120 at the same time, the seal 150 can generate adaptive elastic deformation or compression according to its material characteristics, thereby providing a variable dimensional allowance that varies with the clamping stroke. This dimensional allowance can not only compensate for positional deviations and manufacturing tolerances during the assembly process, but also help the clamping part 131 to achieve progressive clamping of the limiting protrusion 112 more smoothly and reliably.

[0068] In some embodiments of this application, such as Figure 2As shown, along the direction from the bottom wall 1311 to the mounting opening 111, the thickness of the portion of the limiting protrusion 112 near the bottom wall 1311 is greater than the thickness of the portion away from the bottom wall 1311, so that the clamping portion 131 clamps the limiting protrusion 112.

[0069] The thickness of the limiting protrusion 112 along the bottom wall 1311 toward the mounting opening 111 shows a gradual change from thicker at the inside to thinner at the outside. This causes the interference between the clamping part 131 and the limiting protrusion 112 to gradually increase with the increase of the insertion depth as the clamping part 131 gradually slides into the limiting protrusion 112 from the outside to the inside. This guides the clamping part 131 to be gradually tightened from the initial relaxed state to the final designed clamping state during the installation process. This achieves a progressive clamping effect where the clamping part 131 moves closer to the root of the limiting protrusion 112 and the clamping becomes more secure.

[0070] In some embodiments of this application, such as Figure 2 and Figure 7 As shown, the abutment member 140 includes a bent structure 141 with an abutment interface 142. The bent structure 141 includes a first abutment wall 143 and a second abutment wall 144 and a third abutment wall 145 connected to opposite sides of the first abutment wall 143. The first abutment wall 143 is disposed opposite to the abutment interface 142, and the abutment interface 142 is disposed away from the mounting opening 111 relative to the first abutment wall 143. The first abutment wall 143 abuts against the blocking portion 115. One end of the second abutment wall 144 away from the first abutment wall 143 abuts against the stop member 113. The side of the third abutment wall 145 away from the second abutment wall 144 abuts against the fourth side wall 1313 of the clamping portion 131 in a direction perpendicular to the cover 120. Specifically, in this application, the bent structure 141 can be a U-shaped structure.

[0071] The clamping member 130 is locked onto the limiting protrusion 112 by applying force at three locations: the first abutting wall 143 abuts against the blocking part 115, the second abutting wall 144 abuts against the stop member 113, and the third abutting wall 145 abuts against the fourth side wall 1313 of the clamping part 131. This effectively prevents the clamping member 130 from loosening in the radial direction of the mounting opening 111 and in the direction perpendicular to the cover 120. The bending structure 141 uses its own geometry to transform the insertion action in one direction into abutting force in multiple directions, so that the abutting member 140 forms a self-locking effect in the locking space 114, which not only ensures the reliability of locking but also simplifies the locking operation.

[0072] In some embodiments of this application, such as Figure 2 , Figure 6 and Figure 7 As shown, the outer surface of the fourth sidewall 1313 is parallel to the inner surface of the fourth sidewall 1313, and the shape of the outer surface of the third abutting wall 145 is adapted to the shape of the outer surface of the fourth sidewall 1313.

[0073] In this structure, the outer surface of the third abutment wall 145 is shape-adapted to the outer surface of the fourth side wall 1313, which increases the contact area between the two, makes the abutment force distribution more uniform, avoids local stress concentration, and improves the stability and durability of locking. Meanwhile, since the inner and outer surfaces of the fourth side wall 1313 are parallel to each other, the stability of the matching precision between the clamping portion 131 and the abutment member 140 is ensured, and the risk of poor matching caused by machining errors is reduced.

[0074] In some embodiments of the present application, as shown in Figure 2 , the length of the stopper 113 in the direction perpendicular to the box cover 120 is H1. The thickness of the stopper 113 in the direction toward the mounting opening 111 is T1, and T1 satisfies: 1mm≤T1≤10mm, 1mm≤H1 / T1≤10mm.

[0075] The purpose of limiting the thickness of the stopper 113 in the direction toward the mounting opening 111 is to ensure that the stopper 113 has sufficient strength. This thickness design ensures that the stopper 113 is not prone to bending or fracture when subjected to multiple insertions and extractions of the abutment member 140 and long-term locking force, thereby maintaining the long-term reliability of the locking structure; at the same time, the moderate thickness also avoids material waste or occupation of excessive locking space 114 caused by being too thick, achieving a balance between strength and structural compactness.

[0076] In some embodiments of the present application, as shown in Figure 4 , the length of the blocking portion 115 in the direction perpendicular to the box cover 120 is H2, and H2 satisfies: 1mm<H2 / H1<10mm.

[0077] The purpose of limiting the length of the stopper 113 in the direction perpendicular to the box cover 120 is to enable the stopper 113 to have elastic deformation capability, so as to temporarily yield when the abutment member 140 abuts against the locking space 114, and rebound to lock in place after reaching the position. This length design enables the stopper 113 to undergo moderate elastic deformation during the insertion process of the abutment member 140, providing a smooth entry path for the abutment member 140; when the abutment member 140 is fully in place, the stopper 113 returns to its original state and forms a stable abutment fit with the abutment member 140, thereby realizing automatic locking without additional operations.

[0078] In some embodiments of the present application, as shown in Figure 4 , the top end surface 1131 of the stopper 113 is arranged to be inclined from the inner side wall of the stopper 113 toward the outer side wall of the stopper 113, and in the direction perpendicular to the box cover 120, the height of the inner side wall of the stopper 113 is higher than the height of the outer side wall of the stopper 113, and the abutment member 140 abuts against the inner side wall of the stopper 113.

[0079] By setting the top surface 1131 of the stop 113 as an inclined surface with a higher inner side and a lower outer side, the abutment 140 can smoothly slide into the locking space 114 along the inclined surface when locked in the locking space 114. At the same time, the protruding height of the inner sidewall provides a reliable abutment limit for the abutment 140, ensuring both ease of assembly and stability of locking. This inclined surface structure plays a guiding role during the insertion of the abutment 140, reducing the alignment accuracy requirements during installation and making the assembly operation simpler and faster.

[0080] In some embodiments of this application, such as Figure 7 As shown, the end of the abutment 140 that abuts against the stop 113 is provided with a notch 146. The abutment 140 has a locking wall 1461 and a disassembly wall 1462 at the notch 146. The stop 113 abuts against the locking wall 1461 radially along the mounting opening 111, and the stop 113 abuts against the disassembly wall 1462 in a direction perpendicular to the cover 120.

[0081] The abutment 140 forms a locking wall 1461 and a disassembly wall 1462 through the notch 146. This allows the stop 113 to abut against the locking wall 1461 radially at the mounting opening 111 and against the disassembly wall 1462 in a direction perpendicular to the cover 120. These two directions together restrict the displacement of the abutment 140, achieving double locking and effectively preventing loosening. Simultaneously, the disassembly wall 1462 facilitates disassembly. When unlocking is required, the abutment 140 can be easily pried open using a tool applied to the disassembly wall 1462, achieving a balance between reliable locking and convenient disassembly.

[0082] In some embodiments of this application, such as Figure 2 and Figure 7 As shown, the locking wall 1461 and the top surface 1131 of the stop member 113 are spaced apart to define the movable space 160, which can be inserted by a prying device to pry the abutment member 140.

[0083] In some embodiments of this application, such as Figure 7 The angle between the locking wall 1461 and the disassembly wall 1462 is greater than or equal to 90°. Preferably, the angle between the locking wall 1461 and the disassembly wall 1462 is an obtuse angle, for example, it can be 100°, 105°, 110° or 115°.

[0084] By reserving a movable space 160 between the locking wall 1461 and the top surface 1131 of the stop 113, an operating entry point is provided for the prying device. The abutment 140 can be easily pried open without the need for other disassembly tools, significantly improving the convenience of disassembly and assembly and maintenance efficiency. The design of this movable space 160 allows disassembly operations to be completed without special tools, requiring only a simple prying device, thus simplifying the maintenance process. At the same time, the size of the reserved space is reasonably set to ensure that the prying device can be smoothly inserted for operation without affecting the normal abutment and locking function of the locking wall 1461 and the stop 113, achieving a balance between locking and disassembly.

[0085] In some embodiments of this application, such as Figure 2 and Figure 7 Along the direction perpendicular to the cover 120, the length of the locking wall 1461 is H3, and H3 satisfies: 0.5mm≤H3≤5mm.

[0086] By controlling the length of the locking wall 1461 within the range of 0.5mm to 5mm, sufficient contact area between the locking wall 1461 and the stop 113 is ensured, effectively preventing loosening. The lower limit of this length range ensures a stable and reliable contact fit between the locking wall 1461 and the stop 113, avoiding loosening due to insufficient contact area and thus insufficient contact force; the upper limit prevents the locking wall 1461 from being too long, affecting the reserved space 160 or adding unnecessary material redundancy, thus ensuring both locking reliability and structural compactness.

[0087] Please refer to some embodiments of this application. Figure 3 Surrounding the mounting opening 111, the housing 110 is provided with multiple sets of limiting protrusions 112 and stop members 113, and at least one set of limiting protrusions 112 and stop members 113 is provided with clamping members 130 and abutment members 140. At least two sets of limiting protrusions 112 and stop members 113 are located on opposite sides of the mounting opening 111.

[0088] By setting multiple sets of limiting protrusions 112 and stoppers 113 on the housing 110, and correspondingly configuring clamping members 130 and abutment members 140, the housing cover 120 is simultaneously locked in multiple positions, ensuring the reliability of the locking. At least two sets are located on opposite sides of the mounting opening 111, achieving multi-point fixation of the housing cover 120, further enhancing the stability of the locking. This multi-point locking layout distributes the locking force to different positions of the housing cover 120, avoiding the concentration of locking force on one side or a single point, thereby improving the overall locking stability. At the same time, the synergistic effect of multiple locking points also enhances the structure's resistance to external loads such as vibration and impact.

[0089] like Figure 3As shown, the housing 110 is provided with three sets of limiting protrusions 112 and stop members 113. Each set of limiting protrusions 112 and stop members 113 is provided with a clamping member 130 and an abutment member 140. Each set of limiting protrusions 112 and stop members 113 is respectively provided on the three side walls of the housing 110.

[0090] It should be noted that in some embodiments of this application, such as Figure 4 As shown, in a direction perpendicular to the cover 120, the stop 113 protrudes relative to the limiting protrusion 112. In other embodiments, in a direction perpendicular to the cover 120, the stop 113 is aligned with the limiting protrusion 112, that is, on a plane radially parallel to the mounting opening 111, the outer peripheral edge of the limiting protrusion 112 and the outer peripheral edge of the stop 113 overlap in the orthographic projection of that plane.

[0091] This application also provides a battery pack 200, such as Figure 8 As shown, the battery pack 200 includes a battery and a cover locking structure 100, with the battery installed inside the housing 110 within the cover locking structure 100.

[0092] Applying the first aspect of the cover locking structure 100 to the battery pack 200 enables quick disassembly and reliable locking of the cover 120, significantly improving the assembly efficiency and ease of subsequent maintenance of the battery pack 200. This structure eliminates the traditional method of securing the cover with numerous screws. The locking and unlocking of the cover 120 can be completed through the coordinated action of the clamping member 130 and the abutment member 140, simplifying the assembly process and shortening the operation time. At the same time, during subsequent maintenance, it is not necessary to disassemble and install each screw individually; the cover 120 can be removed simply by releasing the locking of the abutment member 140, effectively reducing maintenance difficulty and labor costs.

[0093] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. 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 the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A box lid locking structure, characterized in that, include: The housing (110) has a mounting port (111). At the end of the housing (110) corresponding to the mounting port (111), the outer side wall of the housing (110) is provided with a limiting protrusion (112) and a stop (113) at intervals. A locking space (114) is defined between the limiting protrusion (112) and the stop (113). A box cover (120) is provided on the mounting port (111). Clamping member (130) clamps the limiting protrusion (112) and the box cover (120). An abutment (140) is disposed in the locking space (114), one side of the abutment (140) abuts against the stop (113), and the other side of the abutment (140) abuts against the clamping member (130) to lock the clamping member (130) to the limiting protrusion (112).

2. The box lid locking structure according to claim 1, characterized in that, The The limiting protrusion (112) has a first side (1121) and a second side (1122) disposed opposite to each other in a direction perpendicular to the cover (120). The first side (1121) is away from the stop (113), and the second side (1122) is close to the stop (113). The portion of the first side (1121) of the limiting protrusion (112) near the mounting opening (111) is recessed in a direction perpendicular to the cover (120) to form a limiting step (1123). The lid locking structure (100) also includes a sealing element (150), which is sandwiched between the limiting step (1123) and the lid (120).

3. The box lid locking structure according to claim 2, characterized in that, In the direction perpendicular to the cover (120), the ratio of the height of the limiting step (1123) to the height of the seal (150) is between 0.2 and 0.8; And / or, on a plane parallel to the cover (120), the dimension of the seal (150) along the mounting opening (111) in the direction away from the mounting opening (111) is between 17mm and 23mm; And / or, on a plane parallel to the cover (120), the plane on which the limiting step (1123) supports the seal (150) has a dimension between 19mm and 25mm along the mounting opening (111) in the direction away from the mounting opening (111).

4. The box lid locking structure according to claim 2, characterized in that, The clamping member (130) includes a clamping part (131) and a locking part (132) connected together. The clamping part (131) is used to clamp the limiting protrusion (112) and the box cover (120). The outer wall of the housing (110) includes a limiting part and a blocking part (115). The limiting part has a limiting protrusion (112). The blocking part (115) is located on the side of the limiting protrusion (112) away from the mounting port (111). The stop (113) and the blocking part (115) are arranged opposite to each other in the direction of the mounting port (111) toward the limiting protrusion (112). When the clamping part (131) clamps the box cover (120) against the limiting protrusion (112), the locking part (132) is located in the locking space (114) and is set to fit against the blocking part (115); one side of the abutment (140) abuts against the locking part (132), and the other side of the abutment (140) abuts against the stop (113).

5. The box lid locking structure according to claim 4, characterized in that, The clamping part (131) includes a bottom wall (1311) and a third side wall (1312) and a fourth side wall (1313) connected to opposite sides of the bottom wall (1311). The bottom wall (1311) is located on the side of the limiting protrusion (112) away from the mounting opening (111) along the direction perpendicular to the box cover (120). The third side wall (1312) and the fourth side wall (1313) are located on both sides of the limiting protrusion. The third side wall (1312) abuts against the first side (1121) of the limiting protrusion (112), and the inner surface of the fourth side wall (1313) is inclined from the bottom wall (1311) toward the direction close to the limiting protrusion (112). The surface of the second side (1122) is inclined and adapted to the inner surface of the fourth side wall (1313).

6. The box lid locking structure according to claim 5, characterized in that, The slope of the inner surface of the fourth sidewall (1313) is less than the slope of the surface of the second side (1122) of the limiting protrusion (112).

7. The box lid locking structure according to claim 6, characterized in that, The housing (110) is made of aluminum alloy, and the sealing element (150) is made of silicone or foam.

8. The box lid locking structure according to claim 5, characterized in that, Along the bottom wall (1311) toward the mounting port (111), the thickness of the portion of the limiting protrusion (112) near the bottom wall (1311) is greater than the thickness of the portion away from the bottom wall (1311), so that the clamping part (131) clamps the limiting protrusion (112).

9. The box lid locking structure according to claim 5, characterized in that, The abutment (140) includes a bent structure (141) with an abutment interface (142). The bent structure (141) includes a first abutment wall (143) and a second abutment wall (144) and a third abutment wall (145) connected to opposite sides of the first abutment wall (143). The first abutment wall (143) is disposed opposite to the abutment interface (142). The abutment interface (142) is disposed away from the mounting port (111) relative to the first abutment wall (143). The first abutment wall (143) abuts against the blocking part (115). The end of the second abutment wall (144) away from the first abutment wall (143) abuts against the stop (113). The side of the third abutment wall (145) away from the second abutment wall (144) abuts against the fourth side wall (1313) of the clamping part (131) in a direction perpendicular to the box cover (120).

10. The box lid locking structure according to claim 9, characterized in that, The outer surface of the fourth sidewall (1313) is parallel to the inner surface of the fourth sidewall (1313), and the shape of the outer surface of the third abutting wall (145) is adapted to the shape of the outer surface of the fourth sidewall (1313).

11. The box lid locking structure according to claim 4, characterized in that, The length of the stop (113) along the direction perpendicular to the box cover (120) is H1; The thickness of the stop (113) in the direction facing the mounting opening (111) is T1, and T1 satisfies: 1mm≤T1≤10mm, 1mm≤H1 / T1≤10mm; And / or, the length of the blocking portion (115) in the direction perpendicular to the cover (120) is H2, wherein H2 satisfies: 1 mm <H2 / H1<10mm。 12. The box lid locking structure according to claim 1, characterized in that, The top surface (1131) of the stop (113) is inclined from the inner sidewall of the stop (113) toward the outer sidewall of the stop (113), and in the direction perpendicular to the box cover (120), the height of the inner sidewall of the stop (113) is higher than the height of the outer sidewall of the stop (113), and the abutment (140) abuts against the inner sidewall of the stop (113).

13. The lid locking structure according to claim 12, characterized in that, The end of the abutment (140) that abuts against the stop (113) is provided with a notch (146). The abutment (140) has a locking wall (1461) and a disassembly wall (1462) at the notch (146). The stop (113) abuts against the locking wall (1461) radially along the mounting opening (111), and the stop (113) abuts against the disassembly wall (1462) in a direction perpendicular to the cover (120).

14. The box lid locking structure according to claim 13, characterized in that, The locking wall (1461) and the top surface (1131) of the stop (113) are spaced apart to define an active space (160), which is accessible to a prying device to pry the abutment (140).

15. The box lid locking structure according to claim 13, characterized in that, Along the direction perpendicular to the box cover (120), the length of the locking wall (1461) is H3, and H3 satisfies: 0.5mm≤H3≤5mm.

16. The lid locking structure according to any one of claims 1-15, characterized in that, Surrounding the mounting port (111), the housing (110) is provided with multiple sets of the limiting protrusions (112) and the stop (113), and at least one set of the limiting protrusions (112) and the stop (113) is provided with the clamping member (130) and the abutment member (140). At least two sets of the limiting protrusions (112) and the stop (113) are located on opposite sides of the mounting port (111).

17. A battery pack, characterized in that, The battery pack includes a battery and a cover locking structure (100) as described in any one of claims 1-16, wherein the battery is installed in a housing (110) within the cover locking structure (100).

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