Battery pack case and battery pack

Abstract

A battery pack case (100) and a battery pack. The battery pack case (100) comprises a frame (110), a bottom protective plate (120), and a mounting assembly (130). The frame (110) comprises a space for mounting battery cells. The bottom protective plate (120) is arranged opposite to the frame (110). The bottom protective plate (120) comprises a through-hole (1200) passing through along the thickness direction and a mounting portion (121) located at the edge of the through-hole (1200). The mounting assembly (130) comprises a first connecting member (131) and a limiting member (132) connected to each other. The first connecting member (131) is connected to the frame (110) and comprises an abutting surface (1311). The abutting surface (1311) is located on the side of the first connecting member (131) facing the bottom protective plate (120). The limiting member (132) comprises a first abutting portion (1322) and a limiting portion (1323). The first abutting portion (1322) corresponds to the position of the through-hole (1200) and abuts against the abutting surface (1311), while the limiting portion (1323) is spaced apart from the abutting surface (1311). The mounting portion (121) is mounted between the limiting portion (1323) and the abutting surface (1311). The distance between the limiting portion (1323) and the abutting surface (1311) is greater than or equal to the thickness of the mounting portion (121).

Description

Battery pack box and battery pack

[0001] The present application claims priority to the Chinese patent application No. 202410703388.5 and 202421242530.2, filed on May 31, 2024, to the Chinese Patent Office, the contents of which are hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery pack box and a battery pack. BACKGROUND

[0003] In the related art, the bottom guard plate of the battery pack box is generally connected with the frame through a mounting assembly. The mounting assembly usually exerts a large extrusion force on the bottom guard plate to improve the connection stability of the mounting assembly to the bottom guard plate. SUMMARY

[0004] However, when the mounting assembly exerts a large pressure on the bottom guard plate, the bottom guard plate is easily deformed and even falls off from the mounting assembly.

[0005] The present application provides a battery pack box, comprising:

[0006] a frame, the frame comprising a mounting space configured to mount a battery cell;

[0007] a bottom guard plate, the bottom guard plate being oppositely arranged with the frame, the bottom guard plate comprising a through hole penetrating along a thickness direction thereof, the bottom guard plate comprising a mounting portion located at an edge of the through hole;

[0008] a mounting assembly, the mounting assembly comprising a first connecting member and a limiting member connected with each other, the first connecting member being connected with the frame, the first connecting member comprising an abutting surface, the abutting surface being located on a side of the first connecting member facing the bottom guard plate, the limiting member comprising a first abutting portion and a limiting portion, the first abutting portion corresponding to the through hole in position and abutting with the abutting surface, the limiting portion being arranged in a spaced manner with the abutting surface, the mounting portion being mounted between the limiting portion and the abutting surface, and a distance between the limiting portion and the abutting surface being greater than or equal to a thickness of the mounting portion.

[0009] The present application also provides a battery pack, comprising:

[0010] The battery pack box body is the battery pack box body as above, the battery pack box body comprises a frame, a bottom guard plate and a mounting assembly, the frame comprises a mounting space configured to mount battery cells; the bottom guard plate is arranged opposite to the frame, the bottom guard plate comprises a through hole penetrating along the thickness direction thereof, and 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, and 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, and the distance between the limiting portion and the abutting surface is greater than or equal to the thickness of the mounting portion;

[0011] The battery cell is mounted in the mounting space of the battery pack box body. Advantages

[0012] The battery pack box body provided in the application installs the mounting portion of the bottom guard plate between the limiting portion of the limiting piece and the abutting surface of the first connecting piece of the mounting assembly, and the distance between the limiting portion and the abutting surface is greater than or equal to the thickness of the mounting portion, so that the movement of the mounting portion of the bottom guard plate in the thickness direction of the bottom guard plate is limited by the abutting surface of the first connecting piece and the mounting portion of the bottom guard plate. Moreover, since the distance between the limiting portion of the limiting piece and the abutting surface of the first connecting piece is greater than or equal to the thickness of the mounting portion of the bottom guard plate, the limiting portion of the limiting piece and the abutting surface of the first connecting piece do not exert a large extrusion force on the mounting portion of the bottom guard plate, thereby improving the technical problem that the mounting assembly of the battery pack box body in the related art exerts a large extrusion force on the bottom guard plate, which easily causes the bottom guard plate to be crushed and deformed, and even to fall off the mounting assembly.

[0013] The battery pack provided in the application installs the mounting portion of the bottom guard plate of the battery pack box body between the limiting portion of the limiting piece and the abutting surface of the first connecting piece of the mounting assembly, and the distance between the limiting portion and the abutting surface is greater than or equal to the thickness of the mounting portion, so that the movement of the mounting portion of the bottom guard plate in the thickness direction of the bottom guard plate is limited by the abutting surface of the first connecting piece and the mounting portion of the bottom guard plate. Moreover, since the distance between the limiting portion of the limiting piece and the abutting surface of the first connecting piece is greater than or equal to the thickness of the mounting portion of the bottom guard plate, the limiting portion of the limiting piece and the abutting surface of the first connecting piece do not exert a large extrusion force on the mounting portion of the bottom guard plate, thereby improving the technical problem that the mounting assembly of the battery pack box body in the related art exerts a large extrusion force on the bottom guard plate, which easily causes the bottom guard plate to be crushed and deformed, and even to fall off the mounting assembly. The safety performance and stability of the battery pack are improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is a structural schematic diagram of some implementation modes of the battery pack box body provided in the embodiments of the application;

[0015] Fig. 2 is a sectional view of Fig. 1 along the direction of A-A;

[0016] Fig. 3 is an enlarged view of A in Fig. 2;

[0017] Fig. 4 is a partial view of a sectional view of a mounting assembly provided by an embodiment of the present application, wherein the sectioning surface is perpendicular to the abutting surface of the first connecting piece;

[0018] Fig. 5 is an exploded structural schematic view of the mounting assembly provided by an embodiment of the present application after being sectioned along the direction of A-A in Fig. 1;

[0019] Fig. 6 is an exploded structural schematic view of some implementation manners of the mounting assembly provided by an embodiment of the present application;

[0020] Fig. 7 is another angle view of the exploded structural schematic view of some implementation manners of the mounting assembly provided by an embodiment of the present application.

[0021] Legend of reference signs:

[0022] Battery pack box 100; frame 110; mounting space 1100; cross beam 111; mounting hole 1110; longitudinal beam 112; bottom guard plate 120; through hole 1200; mounting portion 121; mounting assembly 130; first connecting piece 131; abutting surface 1311; mounting groove 1312; first sealing surface 1313; limiting piece 132; via hole 1320; groove 1321; first abutting portion 1322; limiting portion 1323; second abutting portion 1324; second sealing surface 1325; accommodating groove 1326; first sealing piece 133; first sealing portion 1331; second sealing portion 1332; second sealing piece 134; second connecting piece 135; connecting portion 1351; reinforcing portion 1352; fixing portion 1353; third connecting piece 136; liquid cooling plate 140. Embodiments of the present application

[0023] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, and the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, and the horizontal height of the first feature is lower than that of the second feature.

[0025] In the description of the present embodiment, the terms "upper", "lower", "left", "right", "front", "back" and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used to distinguish in the description and have no special meaning.

[0026] In the related art, the bottom guard plate of the battery pack box body is generally connected with the frame through a mounting assembly. The mounting assembly usually exerts a large extrusion force on the bottom guard plate to improve the connection stability of the mounting assembly to the bottom guard plate. For example, after the mounting assembly passes through the through hole of the bottom guard plate, the mounting assembly is in interference fit with the through hole by exerting an extrusion force on the inner circumferential surface of the through hole of the bottom guard plate. Alternatively, the mounting assembly directly locks the bottom guard plate through bolts, and the bolts also exert a large extrusion force on the bottom guard plate. When the mounting assembly exerts a large extrusion force on the bottom guard plate, the bottom guard plate is easily crushed and deformed, and even the bottom guard plate and the mounting assembly are separated.

[0027] In order to avoid the above problems, the present application provides a battery pack box body and a battery pack.

[0028] Fig. 1 is a structural schematic diagram of some implementation modes of the battery pack box body provided by the present application. Fig. 2 is a sectional view along the A-A direction in Fig. 1. Fig. 3 is an enlarged view of A in Fig. 2. As shown in Figs. 1 to 2, the battery pack box body 100 includes a frame 110, a bottom guard plate 120 and a mounting assembly 130, and the frame 110 includes a mounting space 1100 configured to mount a battery cell (not shown in the figure). As shown in Figs. 3 and 4, the bottom guard plate 120 is arranged opposite to the frame 110, and the bottom guard plate 120 includes a through hole 1200 penetrating in the thickness direction thereof. The mounting assembly 130 is connected with the frame 110, 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, so as to mount the bottom guard plate 120 below the frame 110, thereby enabling the bottom guard plate 120 to be mounted and protected by other components of the frame 110.

[0029] As shown in FIGS. 2 and 3, the battery pack case 100 can include a liquid cooling plate 140 mounted to the frame 110 toward one side of the bottom guard plate 120. The liquid cooling plate 140 is located between the frame 110 and the bottom guard plate 120. The liquid cooling plate 140 can cool the battery cells in the mounting space 1100 of the frame 110. The bottom guard plate 120 can protect the liquid cooling plate 140.

[0030] In some implementations, as shown in FIGS. 3 to 7, the mounting assembly 130 includes a first connecting piece 131 connected to the frame 110, thereby connecting the mounting assembly 130 to the frame 110, and a limiting piece 132. The first connecting piece 131 includes an abutting surface 1311 located on one side of the first connecting piece 131 toward the bottom guard plate 120. The limiting piece 132 includes a first abutting portion 1322 and a limiting portion 1323. The first abutting portion 1322 of the limiting piece 132 is in position correspondence with the through hole 1200 and abuts against the abutting surface 1311. The limiting portion 1323 of the limiting piece 132 is spaced apart from the abutting surface 1311.

[0031] It should be noted that the position correspondence of the first abutting portion 1322 of the limiting piece 132 with the through hole 1200 means that the projection of the limiting portion 1323 of the limiting piece 132 on a plane perpendicular to the thickness direction of the bottom guard plate 120 at least partially overlaps the through hole 1200, so that the first abutting portion 1322 of the limiting piece 132 can abut against the abutting surface 1311 of the first connecting piece 131 through the through hole 1200 of the bottom guard plate 120, or a part of the first connecting piece 131 passes through the through hole 1200 of the bottom guard plate 120, so that the abutting surface 1311 of the first connecting piece 131 abuts against the first abutting portion 1322 of the limiting piece 132. Of course, a part of the abutting surface 1311 of the first connecting piece 131 can also be located in the through hole 1200 of the bottom guard plate 120, and the first abutting portion 1322 of the limiting piece 132 extends into the through hole 1200 of the bottom guard plate 120 and abuts against the abutting surface 1311 of the first connecting piece 131.

[0032] As shown in FIGS. 3 and 4, the bottom guard plate 120 includes a mounting portion 121 located at the edge of the through hole 1200, which is mounted between the limiting portion 1323 and the abutting surface 1311, and the distance between the limiting portion 1323 and the abutting surface 1311 is greater than or equal to the thickness of the mounting portion 121. Thus, 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 abutting surface 1311 of the first connecting piece 131 and the mounting portion 121 of the bottom guard plate 120.

[0033] Moreover, since the distance between the limiting portion 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 portion 121 of the bottom guard plate 120, the limiting portion 1323 of the limiting member 132 and the abutting surface 1311 of the first connecting member 131 do not exert a large extrusion force on the mounting portion 121 of the bottom guard plate 120, thereby improving the problem in the related art that the mounting assembly 130 of the battery pack case 100 exerts a large extrusion force on the bottom guard plate 120, which easily causes the bottom guard plate 120 to be crushed and deformed, or even to fall off the mounting assembly 130.

[0034] In some implementations, as shown in FIGS. 6 and 7, the limiting portion 1323 of the limiting member 132 extends along the circumference of the through hole 1200 of the bottom guard plate 120, so as to increase the area of the limiting portion 1323 of the limiting member 132 arranged to abut against the mounting portion 121 of the bottom guard plate 120, and facilitate improving the limiting effect of the limiting portion 1323 on the mounting portion 121 of the bottom guard plate 120.

[0035] Specifically, the mounting portion 121 of the bottom guard plate 120 extends along the circumference of the through hole 1200 in a ring structure. The limiting portion 1323 of the limiting member 132 is arranged in a plate shape. One side surface of the limiting portion 1323 is arranged opposite to the mounting portion 121 of the bottom guard plate 120. The limiting portion 1323 extends along the circumference of the through hole 1200 of the bottom guard plate 120 in a ring structure.

[0036] In some implementations, as shown in FIGS. 3 to 7, the mounting assembly 130 includes a first sealing member 133 arranged between the limiting member 132 and the mounting portion 121 of the bottom guard plate 120, so as 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 avoiding impurities or water vapor from the outside entering the space between the bottom guard plate 120 and the frame 110 through the gap between the limiting member 132 and the bottom guard plate 120.

[0037] In some implementations, as shown in FIGS. 3 to 7, the mounting assembly 130 includes a first sealing member 133 arranged between the limiting member 132 and the mounting portion 121 of the bottom guard plate 120, so as 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 avoiding impurities or water vapor from the outside entering the space between the bottom guard plate 120 and the frame 110 through the gap between the limiting member 132 and the bottom guard plate 120.

[0038] In some implementations, the first sealing part 1331 of the first sealing member 133 can extend along the circumference of the through hole 1200. Specifically, the first sealing part 1331 of the first sealing member 133 can extend along the circumference of the through hole 1200 in a ring-shaped structure, so as to further improve the sealing effect of the first sealing part 1331 on the gap between the limiting part 1323 of the limiting member 132 and the mounting part 121 of the bottom guard plate 120.

[0039] In some implementations, a containing groove 1326 can be formed on the surface of the limiting part 1323 of the limiting member 132 on the side facing the mounting part 121 of the bottom guard plate 120, and the containing groove 1326 is configured to contain part of the first sealing part 1331. By containing part of the first sealing part 1331 through the containing groove 1326, the first sealing part 1331 can be limited, and the relative position between the limiting part 1323 of the limiting member 132 and the first sealing part 1331 can be more stable.

[0040] Moreover, when assembling the bottom guard plate 120 and the mounting assembly 130, the surface of the limiting part 1323 of the limiting member 132 on the side facing the mounting part 121 of the bottom guard plate 120 can be coated with glue first, and the containing groove 1326 can limit the overflow of the glue to a certain extent. Then, the limiting part 1323 of the limiting member 132 is abutted to the side of the mounting part 121 of the bottom guard plate 120 away from the frame 110, and after the glue solidifies, the first sealing part 1331 can be formed between the limiting part 1323 and the mounting part 121.

[0041] Specifically, the containing groove 1326 of the limiting part 1323 can extend along the circumference of the through hole 1200 of the bottom guard plate 120 in a ring-shaped structure, so as to further improve the limiting effect on the first sealing part 1331 and further improve the limiting effect on the overflow of the glue. The number of the containing grooves 1326 is multiple, and the multiple containing grooves 1326 are sequentially and spacedly distributed in the direction away from the through hole 1200.

[0042] In some implementations, the thickness of the first sealing part 1331 can be greater than the depth of the containing groove 1326. In this way, while the first sealing part 1332 is limited by the containing groove 1326, one side of the first sealing part 1322 can abut against the groove bottom of the containing groove 1326, and the other side of the first sealing part 1322 can abut against the surface of the mounting part 121 facing the limiting part 1323, so that the limiting part 1323 of the limiting member 132 and the mounting part 121 of the bottom guard plate 120 can press the first sealing part 1332, so as to improve the sealing effect of the first sealing part 1332 on the gap between the limiting part 1323 of the limiting member 132 and the mounting part 121 of the bottom guard plate 120.

[0043] In other embodiments, the limiting portion 1323 of the limiting member 132 can be made into a rough surface on at least part of the surface towards the mounting portion 121, and the first sealing portion 1332 can be in abutment with the rough surface of the limiting portion 1323 on one side, and in abutment with the surface of the mounting portion 121 towards the limiting portion 1323 on the other side. In this way, the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard 120 can press the first sealing portion 1332, so that the first sealing portion 1332 has a larger friction with the rough 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.

[0044] In some implementations, the distance between the limiting portion 1323 of the limiting member 132 and the abutment surface 1311 of the first connecting member 131 can be greater than or equal to 0.2 mm than the thickness of the mounting portion 121 of the bottom guard 120, so that after the mounting portion 121 of the bottom guard 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 120, thereby ensuring the sealing effect of the first sealing portion 1331.

[0045] In some implementations, the distance between the limiting portion 1323 of the limiting member 132 and the abutment surface 1311 of the first connecting member 131 can be greater than or equal to 0.2 mm than the thickness of the mounting portion 121 of the bottom guard 120, so that after the mounting portion 121 of the bottom guard 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 120, thereby ensuring the sealing effect of the first sealing portion 1331.

[0046] As shown in FIGS. 3 and 4, the first abutment portion 1322 of the limiting member 132 abuts with the abutment surface 1311 of the first connecting member 131 through the through hole 1200 of the bottom guard 120, and the first abutment portion 1322 of the limiting member 132 has sufficient length in the thickness direction of the bottom guard 120, so that the distance between the limiting portion 1323 connected by the first abutment portion 1322 and the abutment surface 1311 of the first connecting member 131 is greater than or equal to the thickness of the mounting portion 121. Of course, the first abutment portion 1322 of the first connecting member 131 and the limiting member 132 can also be inserted into the through hole 1200 of the bottom guard 120 and abut with each other. Alternatively, a part of the first connecting member 131 can abut with the first abutment portion 1322 of the limiting member 132 through the through hole 1200 of the bottom guard 120, as long as the distance between the limiting portion 1323 and the abutment surface 1311 of the first connecting member 131 is greater than or equal to the thickness of the mounting portion 121.

[0047] In some implementations, the first sealing member 133 can further include a second sealing portion 1332 located between the outer circumferential surface of the first abutting portion 1322 of the limiting member 132 and the inner circumferential surface of the through hole 1200 of the bottom guard 120, to seal the gap between the outer circumferential surface of the first abutting portion 1322 of the limiting member 132 and the inner circumferential surface of the through hole 1200 of the bottom guard 120, thereby further improving the sealing effect between the limiting member 132 and the bottom guard 120.

[0048] As shown in FIGS. 6 and 7, the second sealing portion 1332 of the first sealing member 133 can extend along the circumference of the through hole 1200 of the bottom guard 120. Specifically, the second sealing portion 1332 of the first sealing member 133 has a ring structure along the circumference of the through hole 1200 of the bottom guard 120, to further improve the sealing effect of the second sealing portion 1332.

[0049] In some implementations, as shown in FIGS. 3 and 4, the mounting assembly 130 can further include a second sealing member 134 located 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, and to prevent impurities or water vapor from the outside from entering the space between the bottom guard 120 and the frame 110 through the gap between the limiting member 132 and the first connecting member 131.

[0050] The first connecting member 131 further includes a first sealing surface 1313 located on the side of the first connecting member 131 facing the bottom guard 120, and the limiting member 132 includes a second abutting portion 1324 including a second sealing surface 1325 located opposite the first sealing surface 1313 of the first connecting member 131. The second sealing member 134 is located between the first sealing surface 1313 of the first connecting member 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 connecting member 131.

[0051] As shown in FIGS. 3 and 4, one of the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutting portion 1324 is provided with the second sealing member 134, and the second sealing member 134 abuts against the other of the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutting portion 1324, thereby achieving the sealing of the gap between the first sealing surface 1313 of the first connecting member 131 and the second abutting portion 1324 by the second sealing member 134.

[0052] Of course, the first sealing surface 1313 of the first connecting piece 131 and / or the second sealing surface 1325 of the second abutting portion 1324 can be coated with glue, and then the first sealing surface 1313 of the first connecting piece 131 and the second sealing surface 1325 of the second abutting portion 1324 are close to each other, so that the glue contacts the first sealing surface 1313 and the second sealing surface 1325. After the glue solidifies, the second sealing piece 134 is formed.

[0053] In some implementations, as shown in FIGS. 3, 4 and 7, the first sealing surface 1313 of the first connecting piece 131 can be provided with a mounting groove 1312, and at least part of the second sealing piece 134 is mounted in the mounting groove 1312. The mounting groove 1312 can position the second sealing piece 134, which is beneficial to keep the second sealing piece 134 more stably between the first sealing surface 1313 of the first connecting piece 131 and the second sealing surface 1325 of the second abutting portion 1324.

[0054] Of course, the second sealing surface 1325 of the second abutting portion 1324 can be provided with a mounting groove 1312, and at least part of the second sealing piece 134 is mounted in the mounting groove 1312 to position the second sealing piece 134.

[0055] It should be noted that the mounting groove 1312 can be provided in only one of the first sealing surface 1313 of the first connecting piece 131 and the second sealing surface 1325 of the second abutting portion 1324, or the mounting groove 1312 can be provided in both the first sealing surface 1313 of the first connecting piece 131 and the second sealing surface 1325 of the second abutting portion 1324. The specific structure can be determined according to the structure of the first connecting piece 131 and the limiting piece 132.

[0056] In some implementations, as shown in FIGS. 6 and 7, the second abutting portion 1324 can extend along the circumference of the through hole 1200, and the second sealing piece 134 also extends along the circumference of the through hole 1200, thereby improving the sealing effect of the second sealing piece 134 between the second abutting portion 1324 and the abutting surface 1311. Specifically, the second abutting portion 1324 can extend along the circumference of the through hole 1200 in a ring structure, and the second sealing piece 134 also extends along the circumference of the through hole 1200 in a ring structure. Correspondingly, the first sealing surface 1313 and the second sealing surface 1325 are ring structures extending along the circumference of the through hole 1200.

[0057] In some implementations, the second abutting portion 1324 of the limiting member 132 can be located on the side of the first abutting portion 1322 away from the limiting portion 1323. It can be understood that, since the first abutting portion 1322 of the limiting member 132 abuts against the abutting surface 1311 of the first connecting member 131, the position of the first abutting portion 1322 relative to the first connecting member 131 is very stable, and the limiting portion 1323 and the second abutting portion 1324 of the limiting member 132 are not limited by other components or are limited by other components with weak limiting effect. If the distance between the limiting portion 1323 or the second abutting portion 1324 and the first abutting portion 1322 is far, when the limiting portion 1323 or the second abutting portion 1324 is subjected to a large force, it is easy to deform relative to the first abutting portion 1322.

[0058] In the embodiments of the present application, the second abutting portion 1324 and the limiting portion 1323 of the limiting member 132 are connected to the two sides of the first abutting portion 1322, the first abutting portion 1322 can limit the elastic deformation of the second abutting portion 1324 and the limiting portion 1323 to some extent, which is conducive to improving the limiting and sealing effect between the limiting portion 1323 and the mounting portion 121 of the bottom guard plate 120 by the first sealing portion 1331 of the first sealing member 133, and the sealing effect between the second abutting portion 1324 and the abutting surface 1311 of the first connecting member 131 by the second sealing member 134.

[0059] Of course, the first abutting portion 1324 and the limiting portion 1323 of the limiting member 132 can also be connected to the two sides of the second abutting portion 1322. When the second sealing member 134 is arranged 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.

[0060] Specifically, the first abutting portion 1322 of the limiting member 132 extends along the circumference of the through hole 1200 in a cylindrical structure. The limiting portion 1323 is protruded from the outer circumferential surface of the first abutting portion 1322 and extends along the circumference of 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 is kept a certain distance from the abutting surface 1311 of the first connecting member 131, facilitating the mounting of the mounting portion 121 of the bottom guard plate 120 between the limiting portion 1323 and the abutting surface 1311 of the first connecting member.

[0061] The second abutting portion 1324 is protruded from the inner circumferential surface of the first abutting portion 1322 and extends along the circumferential direction of the first abutting portion 1322 to form a ring-shaped plate structure. The second abutting portion 1324 is located at the end of the first abutting portion 1322 close to the first connecting piece 131, so as to reduce the distance between the second abutting portion 1324 and the abutting surface 1311 of the first connecting piece 131, which is conducive to reducing the thickness of the second sealing piece 134 and improving the sealing effect of the second sealing piece 134 on the gap between the second abutting portion 1324 and the abutting surface 1311 of the first connecting piece 131. The first sealing surface 1313 of the second abutting portion 1324 is flush with the side surface of the first abutting portion 1322 facing the abutting surface 1311, and forms a stepped structure with the side surface of the limiting portion 1323 facing the mounting portion 121.

[0062] In some implementations, as shown in FIGS. 3-7, the mounting assembly 130 includes a second connecting piece 135 connected with the first connecting piece 131, and the second connecting piece 135 includes a connecting portion 1351 connected with the limiting piece 132, so as to connect the first connecting piece 131 and the limiting piece 132 together.

[0063] The connecting portion 1351 of the second connecting piece 135 is located on the side of the limiting piece 132 away from the abutting surface 1311 of the first connecting piece 131 and abuts against the limiting piece 132, so as to connect the limiting piece 132 and the first connecting piece 131. By abutting the connecting portion 1351 of the second connecting piece 135 against the side of the limiting piece 132 away from the first connecting piece 131, the movement of the limiting piece 132 towards the direction away from the first connecting piece 131 is limited, so that the limiting portion 1323 of the limiting piece 132 stably limits the movement of the mounting portion 121 of the bottom guard plate 120 towards the direction away from the first connecting piece 131.

[0064] In some implementations, the connecting portion 1351 of the second connecting piece 135 is located on the side of the first abutting portion 1322 of the limiting piece 132 away from the abutting surface 1311 and abuts against the first abutting portion 1322 of the limiting piece 132. By abutting the connecting portion 1351 of the second connecting piece 135 against the side of the first abutting portion 1322 of the limiting piece 132 away from the first connecting piece 131, a pushing force is applied to the first abutting portion 1322, so that the first abutting portion 1322 of the limiting piece 132 more stably abuts against the abutting surface 1311 of the first connecting piece 131.

[0065] In some implementations, as shown in FIGS. 3-7, the limiting member 132 is provided with a through hole 1320, and the second connecting member 135 includes a fixing portion 1353 connected with the connecting portion 1351, the fixing portion 1353 is connected with the first connecting member 131 through the through hole 1320 of the limiting member 132. Specifically, the first abutting portion 1322 of the limiting member 132 is provided in a cylindrical shape. The through hole 1320 of the limiting member 132 passes through the first abutting portion 1322 along the axial direction of the first abutting portion 1322. The second abutting portion 1324 of the limiting member 132 is protruded from the inner circumferential surface of the through hole 1320 and extends along the circumferential direction of the through hole 1320 in a ring structure. The fixing portion 1353 of the second connecting member 135 is connected with the first connecting member 131 through the through hole 1320 and the second abutting portion 1324. The connecting portion 1351 is arranged at the end of the fixing portion 1353 away from the first connecting member 131. The connecting portion 1351 extends along the circumferential direction of the fixing portion 1353 in a ring structure.

[0066] Specifically, the outer circumferential surface of the fixing portion 1353 is provided with external threads, and the end of the first connecting member 131 close to the second connecting member 135 is provided with a threaded hole matched with the external threads of the fixing portion 1353. The fixing portion 1353 is threadedly connected with the first connecting member 131 by screwing the external threads of the fixing portion 1353 into the threaded hole of the first connecting member 131.

[0067] Of course, a threaded hole can also be arranged at the end of the fixing portion 1353 of the second connecting member 135 close to the first connecting portion 1351, and the end of the first connecting member 131 close to the second connecting member 135 is provided with external threads matched with the threaded hole. The fixing portion 1353 is threadedly connected with the first connecting member 131 by screwing the external threads of the first connecting member 131 into the threaded hole of the fixing portion 1353 of the second connecting member 135.

[0068] In some implementations, as shown in FIGS. 3, 4 and 7, a groove 1321 extending from the edge of the through hole 1320 of the limiting member 132 to the first abutting portion 1322 can be arranged on the surface of the limiting member 132 away from the abutting surface 1311, and a reinforcing portion 1352 can be protruded from the side of the connecting portion 1351 facing the limiting member 132, the reinforcing portion 1352 is integrally connected with the fixing portion 1353, and at least part of the reinforcing portion 1352 is accommodated in the groove 1321. Specifically, the reinforcing portion 1352 is integrally arranged with the fixing portion 1353 and the connecting portion 1351. The reinforcing portion 1352 extends along the circumferential direction of the fixing portion 1353 in a ring structure.

[0069] Thus, the structural strength of the connection between the fixed portion 1353 and the connecting portion 1351 of the second connecting member 135 can be strengthened by the reinforcing portion 1352, so that the connection between the fixed portion 1353 and the connecting portion 1351 is less likely to be deformed when the connecting portion 1351 exerts a greater abutting force on the limiting member 132.

[0070] In other embodiments, the limiting member 132 can also be integrally provided with the second connecting member 135, so that the limiting member 132 is connected with the first connecting member 131 when the second connecting member 135 is connected with the first connecting member 131. Alternatively, the limiting member 132 can include a fixed portion 1353 that is connected with the first connecting member 131, so that the limiting member 132 is connected with the first connecting member 131.

[0071] As shown in FIGS. 1-3, the mounting assembly 130 can further include a third connecting member 136 that abuts against a side of the frame 110 away from the bottom guard 120. The first connecting member 131 passes through the frame 110 from a side of the frame 110 toward the bottom guard 120 and is connected with the third connecting member 136, so that the mounting assembly 130 is mounted on the frame 110. When the mounting assembly 130 passes through the through hole 1200 of the bottom guard 120 and directly or indirectly abuts against a side of the bottom guard 120 away from the frame 110, the bottom guard 120 is mounted on the frame 110.

[0072] In this way, the frame 110 can abut against the first connecting member 131 to limit the movement of the first connecting member 131 relative to the frame 110 in a direction away from the bottom guard 120, so that the first connecting member 131 and the third connecting member 136 remain in a relatively fixed position relative to the frame 110 after being connected.

[0073] In addition, the third connecting member 136 and the first connecting member 131 can be connected together by screwing or buckling. Specifically, a threaded hole is formed on a side of the third connecting member 136 toward the frame 110, and an external thread is provided on a section of the first connecting member 131 away from the bottom guard 120. By screwing the external thread of the first connecting member 131 into the threaded hole of the third connecting member 136, the first connecting member 131 and the third connecting member 136 are screwed together.

[0074] In some implementations, 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 facing away from 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.

[0075] 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.

[0076] 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.

[0077] In some implementations, the bottom guard plate 120 can be a composite plate to improve the structural strength of the bottom guard plate 120 and reduce its weight.

[0078] 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.

[0079] 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.

[0080] The embodiment of the application provides a battery pack, which is characterized in that the mounting portion 121 of the bottom guard plate 120 of the battery pack box body 100 is mounted between the limiting portion 1323 of the limiting piece 132 of the mounting assembly 130 and the abutting surface 1311 of the first connecting piece 131, and the distance between the limiting portion 1323 and the abutting surface 1311 is greater than or equal to the thickness of the mounting portion 121, so 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 abutting surface 1311 of the first connecting piece 131 and the mounting portion 121 of the bottom guard plate 120. Moreover, since the distance between the limiting portion 1323 of the limiting piece 132 and the abutting surface 1311 of the first connecting piece 131 is greater than or equal to the thickness of the mounting portion 121 of the bottom guard plate 120, the limiting portion 1323 of the limiting piece 132 and the abutting surface 1311 of the first connecting piece 131 do not exert a large extrusion force on the mounting portion 121 of the bottom guard plate 120, thereby improving the technical problem that the mounting assembly 130 of the battery pack box body 100 exerts a large extrusion force on the bottom guard plate 120 in the prior art, which easily leads to the crushing deformation of the bottom guard plate 120 and even the falling off of the bottom guard plate 120 from the mounting assembly 130, and improving the safety performance and stability of the battery pack.

Claims

1. A battery pack case (100), comprising: a frame (110) comprising a mounting space (1100) configured to mount a battery cell; a bottom guard plate (120) disposed opposite to the frame (110), the bottom guard plate (120) comprising a through hole (1200) extending through a thickness direction thereof, the bottom guard plate (120) comprising a mounting portion (121) located at an edge of the through hole (1200); a mounting assembly (130) comprising a first connecting member (131) and a limiting member (132) connected to each other, the first connecting member (131) being connected to the frame (110), the first connecting member (131) comprising an abutting surface (1311) located on a side of the first connecting member (131) facing the bottom guard plate (120), the limiting member (132) comprising a first abutting portion (1322) and a limiting portion (1323), the first abutting portion (1322) being positionally corresponding to the through hole (1200) and abutting against the abutting surface (1311), the limiting portion (1323) being disposed in a spaced-apart manner from the abutting surface (1311), the mounting portion (121) being mounted between the limiting portion (1323) and the abutting surface (1311), a distance between the limiting portion (1323) and the abutting surface (1311) being greater than or equal to a thickness of the mounting portion (121).

2. The battery pack enclosure (100) of claim 1, wherein, The mounting assembly (130) comprises a first sealing member (133) disposed between the limiting member (132) and the mounting portion (121) to seal a gap between the limiting member (132) and the mounting portion (121).

3. The battery pack enclosure (100) of claim 2, wherein, The first sealing member (133) comprises a first sealing portion (1331) located between the limiting portion (1323) and the mounting portion (121) to seal a gap between the limiting portion (1323) and the mounting portion (121).

4. The battery pack enclosure (100) of claim 3, wherein, A surface of the limiting portion (1323) facing the mounting portion (121) is provided with an accommodation groove (1326) configured to accommodate part of the first sealing portion (1331).

5. The battery pack enclosure (100) of claim 4, wherein, The first sealing portion (1331) extends in a circumferential direction of the through hole (1200) in a ring shape; and / or, the accommodation groove (1326) extends in the circumferential direction of the through hole (1200) in a ring shape.

6. The battery pack enclosure (100) of claim 4, wherein, A thickness of the first sealing portion (1331) is greater than a depth of the accommodation groove (1326), one side of the first sealing portion (1331) abutting against a groove bottom of the accommodation groove (1326), and the other side of the first sealing portion (1331) abutting against a surface of the mounting portion (121) facing the limiting portion (1323).

7. The battery pack enclosure (100) of claim 3, wherein, The rough surface is located on at least part of a surface of the limiting part (1323) towards the mounting part (121), one side of the first sealing part (1331) abuts against the rough surface, and the other side of the first sealing part (1331) abuts against a surface of the mounting part (121) towards the limiting part (1323).

8. The battery pack enclosure (100) of claim 2, wherein, The first abutting part (1322) abuts against the abutting surface (1311) through the through hole (1200); the first sealing part (133) comprises a second sealing part (1332) located between an outer circumferential surface of the first abutting part (1322) and an inner circumferential surface of the through hole (1200) to seal a gap between the outer circumferential surface of the first abutting part (1322) and the inner circumferential surface of the through hole (1200).

9. The battery pack enclosure (100) of claim 8, wherein, The second sealing part (1332) extends along a circumference of the through hole (1200) in a ring structure.

10. The battery pack case (100) according to any one of claims 1 to 9, wherein the mounting assembly (130) further comprises a second sealing part (134) arranged between the limiting part (132) and the first connecting part (131) to seal a gap between the limiting part (132) and the first connecting part (131).

11. The battery pack enclosure (100) of claim 10, wherein, The first connecting part (131) comprises a first sealing surface (1313) located on a side of the first connecting part (131) towards the bottom guard plate (120); the limiting part (132) comprises a second abutting part (1324) comprising a second sealing surface (1325) arranged opposite to the first sealing surface (1313); and the second sealing part (134) is arranged between the first sealing surface (1313) and the second sealing surface (1325) to seal a gap between the limiting part (132) and the first connecting part (131).

12. The battery pack enclosure (100) of claim 11, wherein, The first sealing surface (1313) and / or the second sealing surface (1325) is / are provided with a mounting groove (1312), and at least part of the second sealing part (134) is arranged in the mounting groove (1312).

13. The battery pack enclosure (100) of claim 11, wherein, The second sealing part (134) extends along a circumference of the through hole (1200) in a ring structure, and the second abutting part (1324) extends along a circumference of the through hole (1200) in a ring structure; and / or, the second abutting part (1324) is located on a side of the first abutting part (1322) away from the limiting part (1323).

14. The battery pack enclosure (100) of any one of claims 1 to 13, wherein, A difference between a distance between the limiting part (1323) and the abutting surface (1311) and a thickness of the mounting part (121) is greater than or equal to 0.2 mm; and / or, The mounting part (121) extends along a circumference of the through hole (1200) in a ring structure.

15. The battery pack enclosure (100) of any one of claims 1 to 13, wherein, The mounting assembly (130) comprises a second connecting piece (135) connected with the first connecting piece (131), and the second connecting piece (135) comprises a connecting portion (1351) located on the side of the limiting piece (132) away from the abutting surface (1311) and abutting with the limiting piece (132) to connect the limiting piece (132) with the first connecting piece (131).

16. The battery pack enclosure (100) of claim 15, wherein, The connecting portion (1351) is located on the side of the first abutting portion (1322) away from the abutting surface (1311) and abutting with the first abutting portion (1322).

17. The battery pack enclosure (100) of claim 15, wherein, The limiting piece (132) is provided with a through hole (1320), and the second connecting piece (135) comprises a fixing portion (1353) connected with the connecting portion (1351), and the fixing portion (1353) is connected with the first connecting piece (131) through the through hole (1320). The surface of the limiting piece (132) on the side away from the abutting surface (1311) is provided with a groove (1321) extending from the edge of the through hole (1320) to the first abutting portion (1322), and the side of the connecting portion (1351) facing the limiting piece (132) is provided with a reinforcing portion (1352) integrally connected with the fixing portion (1353), and at least part of the reinforcing portion (1352) is accommodated in the groove (1321).

18. The battery pack case (100) according to any one of claims 1 to 13, wherein the mounting assembly (130) further comprises a third connecting piece (136) abutting on the side of the frame (110) away from the bottom guard plate (120), and the first connecting piece (131) is connected with the third connecting piece (136) through the frame (110) from the side of the frame (110) facing the bottom guard plate (120).

19. The battery pack enclosure (100) of claim 18, wherein, The frame (110) comprises a cross beam (111) provided with a through mounting hole (1110), the third connecting piece (136) abuts on the side of the cross beam (111) away from the bottom guard plate (120) and corresponds to the mounting hole (1110), and the first connecting piece (131) passes through the mounting hole (1110) and is fixedly connected with the third connecting piece (136).

20. A battery pack, comprising: a battery pack case (100) according to any one of claims 1 to 19; and a battery cell installed in the mounting space (1100) of the battery pack case (100).

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