Battery pack box and battery pack

Abstract

The application provides a battery pack box and a battery pack. The battery pack box comprises a frame, a bottom guard plate and a mounting assembly. The frame comprises a mounting space for mounting a battery cell. The bottom guard plate is arranged opposite to the frame. The bottom guard plate comprises a through hole penetrating along the thickness direction thereof. The bottom guard plate comprises a mounting portion located at the edge of the through hole. The mounting assembly comprises a first connecting piece and a limiting piece connected to each other. The first connecting piece is connected to the frame. The first connecting piece comprises an abutting surface located on the side of the first connecting piece facing the bottom guard plate. The limiting piece comprises a first abutting portion and a limiting portion. The first abutting portion corresponds to the through hole and abuts against the abutting surface. The limiting portion is arranged in a spaced manner with the abutting surface. The mounting portion is mounted between the limiting portion and the abutting surface. The distance between the limiting portion and the abutting surface is greater than or equal to the thickness of the mounting portion. The problem that the extrusion force applied by the mounting assembly to the bottom guard plate is large, resulting in the crushing and deformation of the bottom guard plate, can be improved.

Description

Technical Field

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

[0002] In related technologies, the bottom protective plate of the battery pack casing is generally connected to the frame via a mounting assembly. This mounting assembly typically applies significant compressive force to the bottom protective plate to improve the connection stability. However, when the pressure applied by the mounting assembly is too high, it can easily lead to the bottom protective plate being crushed and deformed, or even causing the bottom protective plate to detach from the mounting assembly. Summary of the Invention

[0003] The embodiments of this application provide a battery pack housing and a battery pack, which can improve the technical problem in the related art where the mounting components of the battery pack housing exert large compressive forces on the bottom protective plate, which easily leads to the bottom protective plate being crushed and deformed, or even detaching from the mounting components.

[0004] In a first aspect, embodiments of this application provide a battery pack housing, comprising:

[0005] A frame, the frame including mounting space for mounting battery cells;

[0006] A bottom protective plate is disposed opposite to the frame. The bottom protective plate includes a through hole extending through its thickness direction and a mounting portion located at the edge of the through hole.

[0007] The mounting assembly includes a first connector and a limiting member that are interconnected. The first connector is connected to the frame and includes an abutment surface located on the side of the first connector facing the bottom guard plate. The limiting member includes a first abutment portion and a limiting portion. The first abutment portion corresponds to the position of the through hole and abuts against the abutment surface. The limiting portion is spaced apart from the abutment surface. The mounting portion is installed between the limiting portion and the abutment surface. The distance between the limiting portion and the abutment surface is greater than or equal to the thickness of the mounting portion.

[0008] In some embodiments, the mounting assembly includes a first seal disposed between the limiting member and the mounting portion to seal the gap between the limiting member and the mounting portion.

[0009] In some embodiments, the first seal includes a first sealing portion located between the limiting portion and the mounting portion to seal the gap between the limiting portion and the mounting portion.

[0010] In some embodiments, the limiting portion has a receiving groove on the surface facing the mounting portion, the receiving groove being used to receive a portion of the first sealing portion.

[0011] In some embodiments, the first sealing portion extends circumferentially along the through hole in an annular structure; and / or, the receiving groove extends circumferentially along the through hole in an annular structure.

[0012] In some embodiments, the thickness of the first sealing portion is greater than the depth of the receiving groove, one side of the first sealing portion abuts against the bottom of the receiving groove, and the other side of the first sealing portion abuts against the surface of the mounting portion facing the limiting portion.

[0013] In some embodiments, at least a portion of the surface of the limiting portion facing the mounting portion is a rough surface, one side of the first sealing portion abuts against the rough surface, and the other side of the first sealing portion abuts against the surface of the mounting portion facing the limiting portion.

[0014] In some embodiments, the first abutting portion passes through the through hole and abuts against the abutting surface; the first seal includes a second sealing portion located between the outer peripheral surface of the first abutting portion and the inner peripheral surface of the through hole, to seal the gap between the outer peripheral surface of the first abutting portion and the inner peripheral surface of the through hole.

[0015] In some embodiments, the second sealing portion extends circumferentially along the through hole in an annular structure.

[0016] In some embodiments, the mounting assembly further includes a second seal disposed between the limiting member and the first connecting member to seal the gap between the limiting member and the first connecting member.

[0017] In some embodiments, the first connector includes a first sealing surface located on the side of the first connector facing the bottom guard plate; the limiting member includes a second abutment portion, the second abutment portion including a second sealing surface disposed opposite to the first sealing surface; the second sealing member is disposed between the first sealing surface and the second sealing surface to seal the gap between the limiting member and the first connector.

[0018] In some embodiments, the first sealing surface and / or the second sealing surface are provided with a mounting groove, and at least a portion of the second seal is installed in the mounting groove.

[0019] In some embodiments, the second seal extends circumferentially along the through hole in an annular structure, and the second abutment extends circumferentially along the through hole in an annular structure.

[0020] In some embodiments, the second abutting portion is located on the side of the first abutting portion opposite to the limiting portion.

[0021] In some embodiments, the difference between the distance between the limiting portion and the abutting surface and the thickness of the mounting portion is greater than or equal to 0.2 mm.

[0022] In some embodiments, the mounting portion extends circumferentially along the through hole in an annular structure.

[0023] In some embodiments, the mounting assembly includes a second connector connected to the first connector. The second connector includes a connecting portion located on the side of the limiting member opposite to the abutment surface and abutting against the limiting member to connect the limiting member to the first connector.

[0024] In some embodiments, the connecting portion is located on the side of the first abutting portion opposite to the abutting surface and abuts against the first abutting portion.

[0025] In some embodiments, the limiting member has a through hole, and the second connecting member includes a fixing part connected to the connecting part, the fixing part passing through the through hole and connected to the first connecting member;

[0026] The limiting member has a groove extending from the edge of the through hole toward the first abutting part on the side facing away from the abutting surface; the connecting part has a reinforcing part protruding on the side facing the limiting member, the reinforcing part is integrally connected with the fixing part, and at least part of the reinforcing part is accommodated in the groove.

[0027] In some embodiments, the mounting assembly further includes a third connector abutting against the side of the frame away from the bottom guard plate, and the first connector passing through the frame and connecting to the third connector from the side of the frame facing the bottom guard plate.

[0028] In some embodiments, the frame includes a crossbeam with a through mounting hole, the third connector abuts against the side of the crossbeam opposite to the bottom guard plate and corresponds to the position of the mounting hole, and the first connector passes through the mounting hole and is fixedly connected to the third connector.

[0029] Secondly, embodiments of this application provide a battery pack, comprising:

[0030] A battery pack housing, as described above, includes a frame, a bottom protective plate, and a mounting assembly. The frame includes an installation space for mounting battery cells. The bottom protective plate is disposed opposite to the frame and includes a through hole extending along its thickness direction. The bottom protective plate also includes a mounting portion located at the edge of the through hole. The mounting assembly includes a first connector and a limiting member connected to each other. The first connector is connected to the frame and includes an abutment surface located on the side of the first connector facing the bottom protective plate. The limiting member includes a first abutment portion and a limiting portion. The first abutment portion corresponds to the position of the through hole and abuts against the abutment surface. The limiting portion is spaced apart from the abutment surface. The mounting portion is installed between the limiting portion and the abutment surface, and the distance between the limiting portion and the abutment surface is greater than or equal to the thickness of the mounting portion.

[0031] The battery cells are installed within the mounting space of the battery pack housing.

[0032] The beneficial effects of the embodiments of this application are as follows:

[0033] The battery pack housing and battery pack provided in the embodiments of this application install the mounting portion of the bottom protective plate between the limiting portion of the limiting member of the mounting assembly and the abutment surface of the first connecting member, and the distance between the limiting portion and the abutment surface is greater than or equal to the thickness of the mounting portion. This restricts the movement of the mounting portion of the bottom protective plate in the thickness direction of the bottom protective plate by the abutment surface of the first connecting member and the mounting portion of the limiting member. Furthermore, since the distance between the limiting portion of the limiting member and the abutment surface of the first connecting member is greater than or equal to the thickness of the mounting portion of the bottom protective plate, the limiting portion of the limiting member and the abutment surface of the first connecting member do not exert a large compressive force on the mounting portion of the bottom protective plate. This improves the technical problem in related technologies where the mounting assembly of the battery pack housing exerts a large compressive force on the bottom protective plate, easily leading to the bottom protective plate being crushed and deformed, or even detaching from the mounting assembly. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery pack housing provided in this application;

[0036] Figure 2 yes Figure 1 A cross-sectional view along the AA direction;

[0037] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0038] Figure 4 This is a partial view of the cross-sectional view of the mounting component provided in the embodiment of this application, wherein the cutting plane is perpendicular to the abutment surface of the first connector;

[0039] Figure 5 This is provided by the embodiments of this application. Figure 1 A schematic diagram of the exploded structure of the mounting assembly after cross-section along the AA direction.

[0040] Figure 6 This is an exploded structural diagram of one embodiment of the mounting component provided in this application;

[0041] Figure 7 This is another angle view of the exploded structural schematic diagram of one embodiment of the mounting component provided in this application.

[0042] Battery pack housing 100; frame 110; installation space 1100; crossbeam 111; mounting hole 1110; longitudinal beam 112; bottom guard plate 120; through hole 1200; mounting part 121; mounting assembly 130; first connector 131; abutment surface 1311; mounting groove 1312; first sealing surface 1313; limiting member 132; through hole 1320; groove 1321; first abutment part 1322; limiting part 1323; second abutment part 1324; second sealing surface 1325; receiving groove 1326; first seal 133; first sealing part 1331; second sealing part 1332; second seal 134; second connector 135; connecting part 1351; reinforcing part 1352; fixing part 1353; third connector 136; liquid cooling plate 140. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, 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] In related technologies, the bottom protective plate of the battery pack casing is generally connected to the frame via a mounting assembly. This mounting assembly typically applies significant compressive force to the bottom protective plate to improve the connection stability. For example, after passing through a through-hole in the bottom protective plate, the mounting assembly applies compressive force to the inner circumference of the through-hole, creating an interference fit between the mounting assembly and the through-hole. Alternatively, the mounting assembly can be directly fastened to the bottom protective plate with bolts, which also apply significant compressive force. When the pressure applied by the mounting assembly to the bottom protective plate is too high, it can easily lead to the bottom protective plate being crushed and deformed, or even causing the bottom protective plate to detach from the mounting assembly.

[0045] To avoid the above problems, this application provides a battery pack housing and a battery pack.

[0046] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery pack housing provided in this application. Figure 2 yes Figure 1 A cross-sectional view along the AA direction. Figure 3 yes Figure 2 A magnified view of point A in the middle. (See image below.) Figures 1 to 2 As shown, the battery pack housing 100 includes a frame 110, a bottom protective plate 120, and a mounting assembly 130. The frame 110 includes a mounting space 1100 for mounting battery cells (not shown in the figure). Figure 3 and Figure 4 As shown, the bottom protective plate 120 is disposed opposite to the frame 110, and the bottom protective plate 120 includes a through hole 1200 extending along its thickness direction. The mounting assembly 130 is connected to the frame 110, passes through the through hole 1200 of the bottom protective plate 120, and directly or indirectly abuts against the side of the bottom protective plate 120 opposite to the frame 110, so as to hang the bottom protective plate 120 under the frame 110, thereby allowing the bottom protective plate 120 to be installed on other components of the frame 110 to form protection.

[0047] Among them, such as Figure 2 and Figure 3 As shown, the battery pack housing 100 may include a liquid cooling plate 140, which is mounted on the side of the frame 110 facing the bottom protective plate 120. The liquid cooling plate 140 is located between the frame 110 and the bottom protective plate 120. The liquid cooling plate 140 is capable of cooling the battery cells within the mounting space 1100 of the frame 110. The bottom protective plate 120 provides protection for the liquid cooling plate 140.

[0048] In some embodiments, such as Figures 3 to 7As shown, the mounting assembly 130 includes a first connector 131 and a limiting member 132 connected to each other. The first connector 131 is connected to the frame 110, thereby connecting the mounting assembly 130 to the frame 110. The first connector 131 includes an abutment surface 1311 located on the side of the first connector 131 facing the bottom guard plate 120. The limiting member 132 includes a first abutment portion 1322 and a limiting portion 1323. The first abutment portion 1322 of the limiting member 132 corresponds to the position of the through hole 1200 and abuts against the abutment surface 1311. The limiting portion 1323 of the limiting member 132 is spaced apart from the abutment surface 1311.

[0049] It should be noted that the correspondence between the first abutting portion 1322 of the limiting member 132 and the through hole 1200 means that the projections of the limiting portion 1323 of the limiting member 132 and the through hole 1200 on a plane perpendicular to the thickness direction of the bottom guard plate 120 at least partially overlap, so that the first abutting portion 1322 of the limiting member 132 can pass through the through hole 1200 of the bottom guard plate 120 and abut against the abutting surface 1311 of the first connector 131, or, a portion of the first connector 131 can pass through the through hole 1200 of the bottom guard plate 120, so that the abutting surface 1311 of the first connector 131 abuts against the first abutting portion 1322 of the limiting member 132. Of course, the first connecting member 131 can also be positioned within the through hole 1200 of the bottom guard plate 120, and the first abutting part 1322 of the limiting member 132 can extend into the through hole 1200 of the bottom guard plate 120 and abut against the abutting surface 1311 of the first connecting member 131.

[0050] Among them, such as Figure 3 and Figure 4 As shown, the bottom guard plate 120 includes a mounting portion 121 located at the edge of the through hole 1200. The mounting portion 121 is mounted between the limiting portion 1323 and the abutment surface 1311, and the distance between the limiting portion 1323 and the abutment surface 1311 is greater than or equal to the thickness of the mounting portion 121. This means that the movement of the mounting portion 121 of the bottom guard plate 120 in the thickness direction of the bottom guard plate 120 is limited by the abutment surface 1311 of the first connector 131 and the mounting portion 121 of the limiting member 132.

[0051] Furthermore, since the distance between the limiting part 1323 of the limiting member 132 and the abutting surface 1311 of the first connecting member 131 is greater than or equal to the thickness of the mounting part 121 of the bottom guard plate 120, the limiting part 1323 of the limiting member 132 and the abutting surface 1311 of the first connecting member 131 will not exert a large compressive force on the mounting part 121 of the bottom guard plate 120, thereby improving the problem in the related art where the compressive force exerted by the mounting component 130 of the battery pack housing 100 on the bottom guard plate 120 is large, which easily leads to the bottom guard plate 120 being crushed and deformed, or even falling off from the mounting component 130.

[0052] In some embodiments, such as Figure 6 and Figure 7 As shown, the limiting portion 1323 of the limiting member 132 extends circumferentially along the through hole 1200 of the bottom guard plate 120 to increase the area of ​​the limiting portion 1323 of the limiting member 132 that abuts against the mounting portion 121 of the bottom guard plate 120, which is beneficial to improving the limiting effect of the limiting portion 1323 on the mounting portion 121 of the bottom guard plate 120.

[0053] Specifically, the mounting portion 121 of the bottom guard plate 120 extends circumferentially along the through hole 1200 in a ring-shaped structure. The limiting portion 1323 of the limiting member 132 is plate-shaped. One side of the limiting portion 1323 is positioned opposite to the mounting portion 121 of the bottom guard plate 120. The limiting portion 1323 extends circumferentially along the through hole 1200 of the bottom guard plate 120 in a ring-shaped structure.

[0054] In some embodiments, such as Figures 3 to 7 As shown, the mounting assembly 130 includes a first seal 133, which is disposed between the limiting member 132 and the mounting portion 121 of the bottom guard plate 120 to seal the gap between the limiting member 132 and the mounting portion 121 of the bottom guard plate 120, thereby improving the sealing performance between the bottom guard plate 120 and the mounting assembly 130 and preventing external impurities or moisture from entering the space between the bottom guard plate 120 and the frame 110 through the gap between the bottom guard plate 120 and the limiting member 132.

[0055] The first sealing member 133 may include a first sealing portion 1331, which is located between the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120, to seal the gap between the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120. This prevents external impurities or moisture from entering the space between the bottom guard plate 120 and the frame 110 through the gap between the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120.

[0056] In some embodiments, the first sealing portion 1331 of the first seal 133 may extend circumferentially along the through hole 1200. Specifically, the first sealing portion 1331 of the first seal 133 extends circumferentially along the through hole 1200 in an annular structure to further improve the sealing effect of the first sealing portion 1331 on the gap between the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120.

[0057] In some embodiments, a receiving groove 1326 may be formed on the surface of the limiting portion 1323 of the limiting member 132 facing the mounting portion 121 of the bottom guard plate 120. The receiving groove 1326 is used to receive a portion of the first sealing portion 1331. By receiving a portion of the first sealing portion 1331 through the receiving groove 1326, the first sealing portion 1331 can be limited, making the relative position of the limiting portion 1323 of the limiting member 132 and the first sealing portion 1331 more stable.

[0058] Furthermore, when assembling the bottom guard plate 120 and the mounting assembly 130, adhesive can be applied first to the surface of the limiting portion 1323 of the limiting member 132 facing the mounting portion 121 of the bottom guard plate 120. The receiving groove 1326 can limit the overflow of the adhesive. Then, the limiting portion 1323 of the limiting member 132 is placed against the side of the mounting portion 121 of the bottom guard plate 120 away from the frame 110. After the adhesive solidifies, a first sealing portion 1331 is formed between the limiting portion 1323 and the mounting portion 121.

[0059] The receiving groove 1326 of the limiting part 1323 can extend circumferentially along the through hole 1200 of the bottom guard plate 120. Specifically, the receiving groove 1326 of the limiting part 1323 can extend in a ring structure along the circumferential direction of the through hole 1200 of the bottom guard plate 120 to further improve the limiting effect on the first sealing part 1331 and further improve the effect of limiting glue overflow. There are multiple receiving grooves 1326, and the multiple receiving grooves 1326 are distributed sequentially at intervals along the direction away from the through hole 1200.

[0060] In some embodiments, the thickness of the first sealing portion 1331 may be greater than the depth of the receiving groove 1326. Thus, while the receiving groove 1326 limits the first sealing portion 1332, one side of the first sealing portion 1322 can abut against the bottom of the receiving groove 1326, and the other side of the first sealing portion 1322 abuts against the surface of the mounting portion 121 facing the limiting portion 1323. This causes the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120 to press against the first sealing portion 1332, thereby improving the sealing effect of the first sealing portion 1332 on the gap between the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120.

[0061] In other embodiments, at least a portion of the surface of the limiting portion 1323 of the limiting member 132 facing the mounting portion 121 can be roughened. One side of the first sealing portion 1332 abuts against the roughened surface of the limiting portion 1323, and the other side of the first sealing portion 1332 abuts against the surface of the mounting portion 121 facing the limiting portion 1323. Thus, the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120 can compress the first sealing portion 1332, resulting in greater friction between the first sealing portion 1332 and the roughened surface of the limiting portion 1323, thereby improving the limiting effect on the first sealing portion 1331 and making the relative position of the limiting portion 1323 of the limiting member 132 and the first sealing portion 1331 more stable.

[0062] In some embodiments, the difference between the distance between the limiting portion 1323 of the limiting member 132 and the abutment surface 1311 of the first connecting member 131 and the thickness of the mounting portion 121 of the bottom guard plate 120 can be greater than or equal to 0.2 mm. This is so that after the mounting portion 121 of the bottom guard plate 120 is installed between the limiting portion 1323 of the limiting member 132 and the abutment surface 1311 of the first connecting member 131, a thicker first sealing portion 1331 can be formed between the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120, thereby ensuring the sealing effect of the first sealing portion 1331.

[0063] The difference between the distance between the limiting part 1323 of the limiting member 132 and the abutting surface 1311 of the first connecting member 131 and the thickness of the mounting part 121 of the bottom guard plate 120 can be 0.25mm, 0.3mm, 0.4mm, etc., depending on the structure of the limiting part 1323, the abutting surface 1311 and the first sealing part 1331.

[0064] like Figure 3 and Figure 4 As shown, the first abutting portion 1322 of the limiting member 132 passes through the through hole 1200 of the bottom protective plate 120 and abuts against the abutting surface 1311 of the first connecting member 131. The first abutting portion 1322 of the limiting member 132 has sufficient length in the thickness direction of the bottom protective plate 120, such that the distance between the limiting portion 1323 connected to the first abutting portion 1322 and the abutting surface 1311 of the first connecting member 131 is greater than or equal to the thickness of the mounting portion 121. Alternatively, the first abutting portion 1322 of the first connecting member 131 and the first abutting portion 1322 of the limiting member 132 can be inserted into the through hole 1200 of the bottom protective plate 120 and abut against each other. Alternatively, a portion of the first connector 131 can pass through the through hole 1200 of the bottom cover plate 120 and abut against the first abutting portion 1322 of the limiting member 132, provided that the distance between the limiting portion 1323 and the abutting surface 1311 of the first connector 131 is greater than or equal to the thickness of the mounting portion 121.

[0065] In some embodiments, the first sealing member 133 may further include a second sealing portion 1332, which is located between the outer peripheral surface of the first abutting portion 1322 of the limiting member 132 and the inner peripheral surface of the through hole 1200 of the bottom guard plate 120, so as to seal the gap between the outer peripheral surface of the first abutting portion 1322 of the limiting member 132 and the inner peripheral surface of the through hole 1200 of the bottom guard plate 120, thereby further improving the sealing effect between the limiting member 132 and the bottom guard plate 120.

[0066] Among them, such as Figure 6 and Figure 7 As shown, the second sealing portion 1332 of the first sealing member 133 can extend circumferentially along the through hole 1200 of the bottom guard plate 120. Specifically, the second sealing portion 1332 of the first sealing member 133 has an annular structure along the circumferential direction of the through hole 1200 of the bottom guard plate 120, so as to further improve the sealing effect of the second sealing portion 1332.

[0067] In some embodiments, such as Figure 3 and Figure 4 As shown, the mounting assembly 130 may also include a second seal 134, which is disposed between the limiting member 132 and the first connecting member 131 to seal the gap between the limiting member 132 and the first connecting member 131, thereby preventing external impurities or moisture from entering the space between the bottom guard plate 120 and the frame 110 through the gap between the limiting member 132 and the first connecting member 131.

[0068] The first connector 131 further includes a first sealing surface 1313, which is located on the side of the first connector 131 facing the bottom guard plate 120. The limiting member 132 includes a second abutting portion 1324, which includes a second sealing surface 1325 disposed opposite to the first sealing surface 1313 of the first connector 131. The second sealing member 134 is disposed between the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutting portion 1324 to seal the gap between the limiting member 132 and the first connector 131.

[0069] like Figure 3 and Figure 4 As shown, a second sealing element 134 is provided on one of the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutment portion 1324, and the second sealing element 134 abuts against the other of the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutment portion 1324, thereby achieving the sealing of the gap between the first sealing surface 1313 of the first connector 131 and the second abutment portion 1324 by the second sealing element 134.

[0070] Alternatively, adhesive can be applied to the first sealing surface 1313 of the first connector 131 and / or the second sealing surface 1325 of the second abutment portion 1324. Then, the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutment portion 1324 can be brought close together so that the adhesive comes into contact with the first sealing surface 1313 and the second sealing surface 1325. After the adhesive solidifies, the second sealing component 134 can be formed.

[0071] In some embodiments, such as Figure 3 , Figure 4 and Figure 7 As shown, a mounting groove 1312 can be formed on the first sealing surface 1313 of the first connector 131, and at least a portion of the second seal 134 can be installed in the mounting groove 1312. The mounting groove 1312 can position the second seal 134, which helps to keep the second seal 134 more stably between the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutment portion 1324.

[0072] Alternatively, a mounting groove 1312 may be provided on the second sealing surface 1325 of the second abutment portion 1324, and at least a portion of the second seal 134 may be installed in the mounting groove 1312 to position the second seal 134.

[0073] It should be noted that the mounting groove 1312 may be provided only on one of the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutment portion 1324, or the mounting groove 1312 may be provided on both the first sealing surface 1313 of the first connector 131 and the second sealing surface 1325 of the second abutment portion 1324. The specific method depends on the structure of the first connector 131 and the limiting member 132.

[0074] In some embodiments, such as Figure 6 and Figure 7 As shown, the second abutment portion 1324 can extend circumferentially along the through hole 1200, and the second sealing member 134 can also extend circumferentially along the through hole 1200, thereby improving the sealing effect of the second sealing member 134 between the second abutment portion 1324 and the abutment surface 1311. Specifically, the second abutment portion 1324 can extend circumferentially along the through hole 1200 in an annular structure, and the second sealing member 134 can extend circumferentially along the through hole 1200 in an annular structure. Correspondingly, the first sealing surface 1313 and the second sealing surface 1325 are annular structures extending circumferentially along the through hole 1200.

[0075] In some embodiments, the second abutment portion 1324 of the limiting member 132 can be located on the side of the first abutment portion 1322 away from the limiting portion 1323. It is understood that since the first abutment portion 1322 of the limiting member 132 abuts against the abutment surface 1311 of the first connector 131, the position of the first abutment portion 1322 relative to the first connector 131 is very stable. However, the limiting portion 1323 and the second abutment portion 1324 of the limiting member 132 are not limited by other components, or the limiting effect of other components on the limiting portion 1323 and the second abutment portion 1324 is weak. If the distance between the limiting portion 1323 or the second abutment portion 1324 and the first abutment portion 1322 is large, when the limiting portion 1323 or the second abutment portion 1324 is subjected to a large force, it is easy to deform relative to the first abutment portion 1322.

[0076] In this embodiment, the second abutment portion 1324 and the limiting portion 1323 of the limiting member 132 are connected to both sides of the first abutment portion 1322. The first abutment portion 1322 can limit the elastic deformation of the second abutment portion 1324 and the limiting portion 1323, which is beneficial to improving the limiting and sealing effect of the first sealing portion 1331 of the first sealing member 133 on the limiting portion 1323 and the mounting portion 121 of the bottom guard plate 120, as well as the sealing effect of the second sealing member 134 on the abutment surface 1311 of the second abutment portion 1324 and the first connecting member 131.

[0077] Of course, the first abutting portion 1324 and the limiting portion 1323 of the limiting member 132 can also be connected to both sides of the second abutting portion 1322. When the second sealing member 134 is disposed between the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutting portion 1324, a seal can also be formed between the limiting member 132 and the first connecting member 131.

[0078] Specifically, the first abutting portion 1322 of the limiting member 132 extends circumferentially along the through hole 1200 in a cylindrical structure. The limiting portion 1323 protrudes from the outer peripheral surface of the first abutting portion 1322 and extends circumferentially along the first abutting portion 1322 in an annular plate structure. The limiting portion 1323 is located at the end of the first abutting portion 1322 away from the first connecting member 131, so that the limiting portion 1323 and the abutting surface 1311 of the first connecting member 131 are kept at a certain distance, which facilitates the installation portion 121 of the bottom guard plate 120 between the limiting portion 1323 and the abutting surface 1311 of the first abutting member.

[0079] The second abutment portion 1324 protrudes from the inner circumferential surface of the first abutment portion 1322 and extends circumferentially along the first abutment portion 1322 in an annular plate-like structure. The second abutment portion 1324 is located at the end of the first abutment portion 1322 closest to the first connector 131, thereby reducing the distance between the second abutment portion 1324 and the abutment surface 1311 of the first connector 131. This helps to reduce the thickness of the second seal 134 and improves the sealing effect of the second seal 134 on the gap between the second abutment portion 1324 and the abutment surface 1311 of the first connector 131. The first sealing surface 1313 of the second abutment portion 1324 is flush with the surface of the first abutment portion 1322 facing the abutment surface 1311, and forms a stepped structure with the surface of the limiting portion 1323 facing the mounting portion 121.

[0080] In some embodiments, such as Figures 3 to 7 As shown, the mounting assembly 130 includes a second connector 135 connected to the first connector 131. The second connector 135 includes a connecting portion 1351, which is connected to a limiting member 132, thereby connecting the first connector 131 and the limiting member 132 together.

[0081] Specifically, the connecting portion 1351 of the second connector 135 can be located on the side of the limiting member 132 opposite to the abutment surface 1311 of the first connector 131, and abut against the limiting member 132, so that the limiting member 132 is connected to the first connector 131. By abutting the connecting portion 1351 of the second connector 135 against the side of the limiting member 132 opposite to the first connector 131, the movement of the limiting member 132 away from the first connector 131 can be restricted, and the limiting portion 1323 of the limiting member 132 can stably restrict the movement of the mounting portion 121 of the bottom guard plate 120 away from the first connector 131.

[0082] In some embodiments, the connecting portion 1351 of the second connector 135 may be located on the side of the first abutting portion 1322 of the limiting member 132 away from the abutting surface 1311, and abut against the first abutting portion 1322 of the limiting member 132. By abutting the first abutting portion 1322 of the limiting member 132 away from the first connector 131 with the connecting portion 1351 of the second connector 135 abutting against the side of the first abutting portion 1322 of the limiting member 132 away from the first connector 131, a thrust can be applied to the first abutting portion 1322, so that the first abutting portion 1322 of the limiting member 132 remains more stably abutting against the abutting surface 1311 of the first connector 131.

[0083] In some embodiments, such as Figures 3 to 7As shown, the limiting member 132 has a through hole 1320, and the second connecting member 135 includes a fixing part 1353 connected to the connecting part 1351. The fixing part 1353 passes through the through hole 1320 of the limiting member 132 and connects to the first connecting member 131. Specifically, the first abutting part 1322 of the limiting member 132 is cylindrical. The through hole 1320 of the limiting member 132 passes through the first abutting part 1322 axially. The second abutting part 1324 of the limiting member 132 protrudes from the inner circumferential surface of the through hole 1320 and extends circumferentially along the through hole 1320 in an annular structure. The fixing part 1353 of the second connecting member 135 passes through the through hole 1320 and the second abutting part 1324 and connects to the first connecting member 131. The connecting part 1351 is located at the end of the fixing part 1353 away from the first connecting member 131. The connecting part 1351 extends circumferentially along the fixing part 1353 in a ring structure.

[0084] Specifically, the fixing part 1353 of the second connector 135 can be threadedly connected to the first connector 131. Specifically, the fixing part 1353 has an external thread on its outer peripheral surface, and the first connector 131 has a threaded hole at one end near the second connector 135 that matches the external thread of the fixing part 1353. The fixing part 1353 is threadedly connected to the first connector 131 by screwing the external thread of the fixing part 1353 of the second connector 135 into the threaded hole of the first connector 131.

[0085] Alternatively, a threaded hole can be provided at one end of the fixing part 1353 of the second connector 135 near the first connector 1351, and an external thread adapted to the threaded hole can be provided at one end of the first connector 131 near the second connector 135. By screwing the external thread of the first connector 131 into the threaded hole of the fixing part 1353 of the second connector 135, the fixing part 1353 and the first connector 131 can be threadedly connected.

[0086] In some embodiments, such as Figure 3 , Figure 4 and Figure 7 As shown, a groove 1321 extending from the edge of the through hole 1320 of the limiting member 132 towards the first abutment portion 1322 can be formed on the surface of the limiting member 132 opposite to the abutment surface 1311. A reinforcing portion 1352 protrudes from the connecting portion 1351 on the side facing the limiting member 132. The reinforcing portion 1352 is integrally connected to the fixing portion 1353, and at least a portion of the reinforcing portion 1352 is accommodated within the groove 1321. Specifically, the reinforcing portion 1352 is integrally formed with the fixing portion 1353 and the connecting portion 1351. The reinforcing portion 1352 extends circumferentially along the fixing portion 1353 in a ring structure.

[0087] Therefore, the structural strength of the connection between the fixing part 1353 and the connecting part 1351 of the second connector 135 can be strengthened by the reinforcing part 1352, so that when the connecting part 1351 applies a large abutting force to the limiting member 132, the connection between the fixing part 1353 and the connecting part 1351 is not prone to deformation.

[0088] In other embodiments, the limiting member 132 and the second connecting member 135 can be integrally formed. When the second connecting member 135 is connected to the first connecting member 131, the limiting member 132 and the first connecting member 131 can be connected together. Alternatively, the limiting member 132 can include a fixing part 1353, which is connected to the first connecting member 131, thereby connecting the limiting member 132 and the first connecting member 131.

[0089] like Figures 1 to 3 As shown, the mounting assembly 130 may further include a third connector 136, which abuts against the side of the frame 110 away from the bottom guard plate 120. The first connector 131 passes through the frame 110 from the side of the frame 110 facing the bottom guard plate 120 and connects with the third connector 136, thereby mounting the mounting assembly 130 on the frame 110. When the mounting assembly 130 passes through the through hole 1200 of the bottom guard plate 120 and directly or indirectly abuts against the side of the bottom guard plate 120 away from the frame 110, the bottom guard plate 120 can be mounted on the frame 110.

[0090] The frame 110 can be made to abut against the first connector 131 to restrict the first connector 131 from moving relative to the frame 110 in a direction away from the bottom guard plate 120, so that the first connector 131 and the third connector 136 are connected and maintain a relatively fixed position with the frame 110.

[0091] In addition, the third connector 136 and the first connector 131 can be connected together by threaded connection or snap-fit ​​connection. Specifically, the third connector 136 has a threaded hole on the side facing the frame 110, and the first connector 131 has an external thread on the section away from the bottom guard plate 120. By screwing the external thread of the first connector 131 into the threaded hole of the third connector 136, the first connector 131 and the third connector 136 are threaded together.

[0092] In some embodiments, the frame 110 includes a crossbeam 111 with a through mounting hole 1110. A third connector 136 abuts against the side of the crossbeam 111 opposite to the bottom guard plate 120 and corresponds to the mounting hole 1110. A first connector 131 passes through the mounting hole 1110 and is fixedly connected to the third connector 136. It is understood that since at least a portion of the weight of the bottom guard plate 120 is transmitted to the frame 110 through the first connector 131 of the mounting assembly 130, if the structural strength of the frame 110 connected to the first connector 131 is weak, the frame 110 is prone to deformation under at least a portion of the weight of the bottom guard plate 120. This embodiment of the application reduces the risk of deformation of the frame 110 under at least a portion of the weight of the bottom guard plate 120 by fixing the first connector 131 and the third connector 136 to the crossbeam 111, which has higher structural strength.

[0093] Specifically, the frame 110 includes a crossbeam 111 and a longitudinal beam 112, which intersect to form multiple installation spaces 1100. Multiple mounting components 130 are provided on the crossbeam 111, and the multiple mounting components 130 are distributed sequentially along the length of the crossbeam 111.

[0094] In this embodiment of the application, the number of mounting components 130 can be one or more, which can be determined according to factors such as the weight of the bottom guard plate 120 and the installation position of the mounting components 130.

[0095] In some embodiments, the bottom guard plate 120 may be a composite plate to improve the structural strength of the bottom guard plate 120 and reduce its weight.

[0096] This application also provides a battery pack, which includes a battery pack housing. The specific structure of the battery pack housing is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0097] The battery pack includes a battery pack housing 100 and battery cells. The battery pack housing 100 can be the battery pack housing 100 in any of the above embodiments, and the battery cells are installed in the installation space 1100 of the battery pack housing 100.

[0098] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. 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 application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery pack housing, characterized in that, include: A frame, the frame including mounting space for mounting battery cells; A bottom protective plate is disposed opposite to the frame. The bottom protective plate includes a through hole extending through its thickness direction. The bottom protective plate includes a mounting portion located at the edge of the through hole. The mounting portion extends circumferentially along the through hole in a ring structure. The mounting assembly includes a first connector and a limiting member that are interconnected. The first connector is connected to the frame and includes an abutment surface located on the side of the first connector facing the bottom guard plate. The limiting member includes a first abutment portion and a limiting portion. The first abutment portion corresponds to the position of the through hole and abuts against the abutment surface. The limiting portion is spaced apart from the abutment surface. The mounting portion is installed between the limiting portion and the abutment surface. The distance between the limiting portion and the abutment surface is greater than or equal to the thickness of the mounting portion. The mounting assembly includes a second connector connected to the first connector. The second connector includes a connecting portion located on the side of the limiting member opposite to the abutment surface and abutting against the limiting member to connect the limiting member to the first connector. The limiting member has a through hole. The second connector includes a fixing portion connected to the connecting portion, and the fixing portion passes through the through hole and connects to the first connector.

2. The battery pack housing as described in claim 1, characterized in that, The mounting assembly includes a first seal, which is disposed between the limiting member and the mounting portion to seal the gap between the limiting member and the mounting portion.

3. The battery pack housing as described in claim 2, characterized in that, The first sealing element includes a first sealing portion located between the limiting portion and the mounting portion to seal the gap between the limiting portion and the mounting portion.

4. The battery pack housing as described in claim 3, characterized in that, The limiting part has a receiving groove on the surface facing the mounting part, and the receiving groove is used to receive part of the first sealing part.

5. The battery pack housing as described in claim 4, characterized in that, The first sealing portion extends in an annular structure along the circumference of the through hole; and / or, the receiving groove extends in an annular structure along the circumference of the through hole.

6. The battery pack housing as described in claim 4, characterized in that, The thickness of the first sealing part is greater than the depth of the receiving groove. One side of the first sealing part abuts against the bottom of the receiving groove, and the other side of the first sealing part abuts against the surface of the mounting part facing the limiting part.

7. The battery pack housing as described in claim 3, characterized in that, At least a portion of the surface of the limiting portion facing the mounting portion is a rough surface, one side of the first sealing portion abuts against the rough surface, and the other side of the first sealing portion abuts against the surface of the mounting portion facing the limiting portion.

8. The battery pack housing as described in claim 2, characterized in that, The first abutting portion passes through the through hole and abuts against the abutting surface; the first sealing member includes a second sealing portion, which is located between the outer peripheral surface of the first abutting portion and the inner peripheral surface of the through hole, so as to seal the gap between the outer peripheral surface of the first abutting portion and the inner peripheral surface of the through hole.

9. The battery pack housing as described in claim 8, characterized in that, The second sealing part extends circumferentially along the through hole in an annular structure.

10. The battery pack housing as described in claim 1, characterized in that, The mounting assembly further includes a second seal, which is disposed between the limiting member and the first connecting member to seal the gap between the limiting member and the first connecting member.

11. The battery pack housing as described in claim 10, characterized in that, The first connector includes a first sealing surface located on the side of the first connector facing the bottom guard plate; the limiting member includes a second abutting portion, the second abutting portion including a second sealing surface disposed opposite to the first sealing surface; the second sealing member is disposed between the first sealing surface and the second sealing surface to seal the gap between the limiting member and the first connector.

12. The battery pack housing as described in claim 11, characterized in that, The first sealing surface and / or the second sealing surface are provided with a mounting groove, and at least a portion of the second sealing element is installed in the mounting groove.

13. The battery pack housing as described in claim 11, characterized in that, The second sealing element extends circumferentially along the through hole in an annular structure, and the second abutting portion extends circumferentially along the through hole in an annular structure.

14. The battery pack housing as described in claim 11, characterized in that, The second abutting portion is located on the side of the first abutting portion that is away from the limiting portion.

15. The battery pack housing as described in any one of claims 1 to 14, characterized in that, The difference between the distance between the limiting part and the abutting surface and the thickness of the mounting part is greater than or equal to 0.2 mm.

16. The battery pack housing as described in any one of claims 1 to 14, characterized in that, The connecting portion is located on the side of the first abutting portion away from the abutting surface and abuts against the first abutting portion.

17. The battery pack housing as described in any one of claims 1 to 14, characterized in that, The limiting member has a groove extending from the edge of the through hole toward the first abutting part on the side facing away from the abutting surface; the connecting part has a reinforcing part protruding on the side facing the limiting member, the reinforcing part is integrally connected with the fixing part, and at least part of the reinforcing part is accommodated in the groove.

18. The battery pack housing as described in any one of claims 1 to 14, characterized in that, The mounting assembly further includes a third connector abutting against the side of the frame away from the bottom guard plate, and the first connector passing through the frame from the side of the frame facing the bottom guard plate and connecting to the third connector.

19. The battery pack housing as described in claim 18, characterized in that, The frame includes a crossbeam with a through mounting hole. The third connector abuts against the side of the crossbeam away from the bottom guard plate and corresponds to the position of the mounting hole. The first connector passes through the mounting hole and is fixedly connected to the third connector.

20. A battery pack, characterized in that, include: A battery pack housing, wherein the battery pack housing is the battery pack housing as described in any one of claims 1 to 19; The battery cells are installed within the mounting space of the battery pack housing.

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