Battery pack box body and battery pack

Abstract

The utility model provides a battery pack box body and a battery pack, the battery pack box body comprises a frame, a bottom protection plate and a hanging assembly, and the frame comprises a mounting space for mounting a battery cell; the bottom protection plate is arranged opposite to the frame, the bottom protection plate comprises a through hole penetrating in the thickness direction of the bottom protection plate, and the bottom protection plate comprises a mounting part located on the edge of the through hole; the mounting assembly comprises a first connecting piece and a limiting piece which are connected with each other, the first connecting piece is connected with the frame, the first connecting piece comprises an abutting face, the abutting face is located on the side, facing the bottom protection plate, of the first connecting piece, the limiting piece comprises a first abutting part and a limiting part, the first abutting part corresponds to the through hole in position and abuts against the abutting face, and the limiting part is located on the side, facing the bottom protection plate, of the first connecting piece; the limiting part and the abutting surface are arranged at intervals, the mounting part is mounted between the limiting part and the abutting surface, and the distance between the limiting part and the abutting surface is larger than or equal to the thickness of the mounting part, so that the problem that the bottom protection plate is crushed and deformed due to the fact that the extrusion force applied by the mounting assembly to the bottom protection plate is large can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack case and a battery pack. Background Art

[0002] In the related art, the bottom guard plate of the battery pack box is generally connected to the frame through a mounting assembly, wherein the mounting assembly usually applies a large extrusion force to the bottom guard plate to improve the connection stability of the mounting assembly to the bottom guard plate. However, when the mounting assembly applies a large pressure to the bottom guard plate, it is easy to cause the bottom guard plate to be crushed and deformed, or even cause the bottom guard plate to fall off from the mounting assembly. Utility Model Content

[0003] The embodiments of the present application provide a battery pack case and a battery pack, which can improve the technical problem in the related art that the mounting assembly of the battery pack case applies a large extrusion force to the bottom guard plate, which easily causes the bottom guard plate to be crushed and deformed, or even fall off from the mounting assembly.

[0004] In a first aspect, an embodiment of the present application provides a battery pack case, comprising:

[0005] A frame, the frame comprising a mounting space for mounting a battery cell;

[0006] A bottom guard plate, arranged opposite to the frame, the bottom guard plate comprising a through hole penetrating along the thickness direction thereof, and the bottom guard plate comprising a mounting portion located at an edge of the through hole;

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

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

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

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

[0011] In some embodiments, the first sealing portion extends along the circumference of the through hole and has an annular structure; and / or the accommodating groove extends along the circumference of the through hole and has 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 abutment portion passes through the through hole and abuts against the abutment surface; the first sealing member includes a second sealing portion, which is located between the outer peripheral surface of the first abutment portion and the inner peripheral surface of the through hole to seal the gap between the outer peripheral surface of the first abutment portion and the inner peripheral surface of the through hole.

[0015] In some embodiments, the second sealing portion extends along the circumference of the through hole and has an annular structure.

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

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

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

[0019] In some embodiments, the second sealing member extends along the circumference of the through hole to form an annular structure, and the second abutting portion extends along the circumference of the through hole to form an annular structure.

[0020] In some embodiments, the second abutting portion is located on a side of the first abutting portion away from 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 along the circumference of the through hole to form an annular structure.

[0023] In some embodiments, the mounting assembly includes a second connecting member connected to the first connecting member, the second connecting member includes a connecting portion, the connecting portion is located on the side of the limiting member away from the abutting surface, and abuts against the limiting member to connect the limiting member to the first connecting member.

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

[0025] In some embodiments, the limiting member is provided with a through hole, the second connecting member includes a fixing portion connected to the connecting portion, and the fixing portion passes through the through hole and is connected to the first connecting member;

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

[0027] In some embodiments, the mounting assembly further includes a third connecting member, the third connecting member abuts against a side of the frame facing away from the bottom guard plate, and the first connecting member passes through the frame from a side of the frame toward the bottom guard plate to connect to the third connecting member.

[0028] In some embodiments, the frame includes a crossbeam having a penetrating mounting hole, the third connecting member abuts against a side of the crossbeam away from the bottom guard plate and corresponds to the position of the mounting hole, and the first connecting member passes through the mounting hole and is fixedly connected to the third connecting member.

[0029] In a second aspect, an embodiment of the present application provides a battery pack, comprising:

[0030] A battery pack case, the battery pack case is the battery pack case as described above, the battery pack case includes a frame, a bottom guard plate and a mounting assembly, the frame includes an installation space for installing a battery cell; the bottom guard plate is arranged opposite to the frame, the bottom guard plate includes a through hole penetrating along its thickness direction, and the bottom guard plate includes a mounting portion located at the edge of the through hole; the mounting assembly includes a first connecting member and a limiting member connected to each other, the first connecting member is connected to the frame, the first connecting member includes an abutting surface, the abutting surface is located on the side of the first connecting member facing the bottom guard plate, the limiting member includes a first abutting portion and a limiting portion, the first abutting portion corresponds to the position of the through hole and abuts against the abutting surface, the limiting portion and the abutting surface are arranged at an interval, the mounting portion is installed 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;

[0031] The battery cell is installed in the installation space of the battery pack box.

[0032] Beneficial effects of the embodiments of the present application:

[0033] The battery pack case and battery pack provided by the embodiments of the present application install the mounting portion of the bottom guard plate between the limiting portion of the limiting member of the mounting assembly and the abutting surface of the first connecting member, 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 member and the mounting portion of the limiting member. Moreover, since the distance between the limiting portion of the limiting member and the abutting surface of the first connecting member is greater than or equal to the thickness of the mounting portion of the bottom guard plate, the abutting surface of the limiting portion of the limiting member and the first connecting member will not exert a large extrusion force on the mounting portion of the bottom guard plate, thereby improving the technical problem in the related art that the mounting assembly of the battery pack case exerts a large extrusion force on the bottom guard plate, which easily causes the bottom guard plate to be crushed and deformed, or even detached from the mounting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a structural schematic diagram of an embodiment of a battery pack box provided in an embodiment of the present application;

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

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

[0038] Figure 4 is a partial view of a cross-sectional view of a mounting assembly provided in an embodiment of the present application, wherein the cross-sectional view is perpendicular to the abutment surface of the first connecting member;

[0039] Figure 5 The embodiment of this application provides Figure 1 The exploded structural diagram of the mounting assembly after sectioning along the AA direction;

[0040] Figure 6 It is a schematic diagram of the exploded structure of an embodiment of a mounting component provided in an embodiment of the present application;

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

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

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0044] In the related art, the bottom guard plate of the battery pack case is generally connected to the frame through a mounting assembly, wherein the mounting assembly usually applies a large extrusion force to 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 and the through hole are interference fit by applying an extrusion force to the inner circumference of the through hole of the bottom guard plate. Alternatively, the mounting assembly directly locks the bottom guard plate with bolts, and the bolts also apply a large extrusion force to the bottom guard plate. When the pressure applied by the mounting assembly to the bottom guard plate is large, it is easy to cause the bottom guard plate to be crushed and deformed, and even cause the bottom guard plate to fall off from the mounting assembly.

[0045] In order to avoid the above problems, an embodiment of the present application provides a battery pack case and a battery pack.

[0046] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack case provided in an embodiment of the present application. Figure 2 yes Figure 1 Cross-sectional view along AA direction. Figure 3 yes Figure 2 The enlarged view of A in the figure. Figure 1 to Figure 2 As shown, the battery pack box 100 includes a frame 110, a bottom guard plate 120 and a mounting assembly 130. The frame 110 includes an installation space 1100 for installing a battery cell (not shown in the figure). Figure 3 and Figure 4 As shown, the bottom guard plate 120 is arranged opposite to the frame 110, and the bottom guard plate 120 includes a through hole 1200 penetrating along the thickness direction thereof. The mounting assembly 130 is connected to the frame 110, and 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 under the frame 110, so that the bottom guard plate 120 can be installed on other components of the frame 110 to form protection.

[0047] Among them, Figure 2 and Figure 3 As shown, the battery pack case 100 may include a liquid cooling plate 140, which is installed on the side of the frame 110 facing 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 installation space 1100 of the frame 110. The bottom guard plate 120 can protect the liquid cooling plate 140.

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

[0049] It should be noted that the correspondence between the position of the first abutment portion 1322 of the limiting member 132 and the through hole 1200 means that the limiting portion 1323 of the limiting member 132 and the projection of the through hole 1200 on the plane perpendicular to the thickness direction of the bottom guard plate 120 at least partially overlap, so that the first abutment portion 1322 of the limiting member 132 can pass through the through hole 1200 of the bottom guard plate 120 and abut against the abutment surface 1311 of the first connecting member 131, or, a part of the first connecting member 131 passes through the through hole 1200 of the bottom guard plate 120, so that the abutment surface 1311 of the first connecting member 131 abuts against the first abutment portion 1322 of the limiting member 132. Of course, part of the abutting surface 1311 of the first connecting member 131 may be located in the through hole 1200 of the bottom guard plate 120 , and the first abutting portion 1322 of the limiting member 132 may 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, 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, and the mounting portion 121 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. Therefore, 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 member 131 and the mounting portion 121 of the limiting member 132.

[0051] 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 will 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 can easily cause the bottom guard plate 120 to be crushed and deformed, or even fall off from the mounting assembly 130.

[0052] In some embodiments, Figure 6 and Figure 7 As shown, the limiting portion 1323 of the limiting member 132 extends along the circumference of the through hole 1200 of the bottom guard plate 120 to increase the area of ​​the limiting portion 1323 of the limiting member 132 used to abut 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 in a ring-shaped structure along the circumference of the through hole 1200. The limiting portion 1323 of the limiting member 132 is arranged in a plate shape. One side plate 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 in a ring-shaped structure along the circumference of the through hole 1200 of the bottom guard plate 120.

[0054] In some embodiments, Figures 3 to 7 As shown, the mounting assembly 130 includes a first sealing member 133, which is arranged 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 water vapor 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 water vapor 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 sealing member 133 may be extended along the circumference of the through hole 1200. Specifically, the first sealing portion 1331 of the first sealing member 133 extends along the circumference of the through hole 1200 in an annular structure, so as 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 provided on the surface of the limiting portion 1323 of the limiting member 132 facing the mounting portion 121 of the bottom guard plate 120, and the receiving groove 1326 is used to receive part of the first sealing portion 1331. By receiving a part of the first sealing portion 1331 in the receiving groove 1326, the first sealing portion 1331 can be limited, so that the relative position of the limiting portion 1323 of the limiting member 132 and the first sealing portion 1331 is more stable.

[0058] Moreover, when assembling the bottom guard plate 120 and the mounting assembly 130, glue can be first applied to the surface of the limiting portion 1323 of the limiting member 132 facing the mounting portion 121 of the bottom guard plate 120, and the receiving groove 1326 can play a certain role in limiting the overflow of the glue. Then, the limiting portion 1323 of the limiting member 132 is abutted against the side of the mounting portion 121 of the bottom guard plate 120 away from the frame 110, and after the glue solidifies, a first sealing portion 1331 can be formed between the limiting portion 1323 and the mounting portion 121.

[0059] The receiving groove 1326 of the limiting portion 1323 can be extended along the circumference of the through hole 1200 of the bottom guard plate 120. Specifically, the receiving groove 1326 of the limiting portion 1323 can be extended along the circumference of the through hole 1200 of the bottom guard plate 120 to form an annular structure, so as to further improve the limiting effect on the first sealing portion 1331 and further improve the limiting effect on the overflow of glue. There are multiple receiving grooves 1326, and the multiple receiving grooves 1326 are sequentially spaced and distributed in a direction away from the through hole 1200.

[0060] In some embodiments, the thickness of the first sealing portion 1331 can be made greater than the depth of the receiving groove 1326. Thus, while the first sealing portion 1332 is limited by the receiving groove 1326, 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, so that the limiting portion 1323 of the limiting member 132 and the mounting portion 121 of the bottom guard plate 120 squeeze the first sealing portion 1332, so as to improve 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 part of the surface of the limiting portion 1323 of the limiting member 132 facing the mounting portion 121 can be made rough, one side of the first sealing portion 1332 abuts against the rough 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 squeeze the first sealing portion 1332, so that there is a greater friction force between the first sealing portion 1332 and the rough surface of the limiting portion 1323, so as to improve the limiting effect on the first sealing portion 1331, and make 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 abutting surface 1311 of the first connecting member 131 and the thickness of the mounting portion 121 of the bottom guard plate 120 can be made greater than or equal to 0.2 mm, 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 abutting 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] Among them, the difference between the distance between the limiting portion 1323 of the limiting member 132 and the abutting surface 1311 of the first connecting member 131 and the thickness of the mounting portion 121 of the bottom guard plate 120 can be 0.25mm, 0.3mm, 0.4mm, etc., which can be determined according to the structure of the limiting portion 1323, the abutting surface 1311 and the first sealing portion 1331.

[0064] like Figure 3 and Figure 4 As shown, the first abutting portion 1322 of the stopper 132 passes through the through hole 1200 of the bottom guard plate 120 and abuts against the abutting surface 1311 of the first connecting member 131, and the first abutting portion 1322 of the stopper 132 has a sufficient length in the thickness direction of the bottom guard plate 120, so that the distance between the stopper 1323 connected by 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. Of course, the first connecting member 131 and the first abutting portion 1322 of the stopper 132 can also be respectively inserted into the through hole 1200 of the bottom guard plate 120 and abut against each other. Alternatively, a portion of the first connecting member 131 is passed through the through hole 1200 of the bottom guard plate 120 to abut against the first abutment portion 1322 of the limiting member 132, and it is sufficient that 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.

[0065] In some embodiments, the first sealing member 133 may also include a second sealing portion 1332, which is located between the outer peripheral surface of the first abutment portion 1322 of the limiting member 132 and the inner peripheral surface of the through hole 1200 of the bottom guard plate 120 to seal the gap between the outer peripheral surface of the first abutment 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, Figure 6 and Figure 7 As shown, 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 plate 120. Specifically, the second sealing portion 1332 of the first sealing member 133 is an annular structure along the circumference of the through hole 1200 of the bottom guard plate 120 to further improve the sealing effect of the second sealing portion 1332.

[0067] In some embodiments, Figure 3 and Figure 4 As shown, the mounting assembly 130 may also include a second sealing member 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 to prevent external impurities or water vapor 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] Among them, the first connecting member 131 also includes a first sealing surface 1313, which is located on the side of the first connecting member 131 facing the bottom guard plate 120, and the limiting member 132 includes a second abutting portion 1324, which includes a second sealing surface 1325 arranged opposite to the first sealing surface 1313 of the first connecting member 131, and 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 to seal the gap between the limiting member 132 and the first connecting member 131.

[0069] like Figure 3 and Figure 4 As shown, a second sealing member 134 is provided on 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, and the second sealing member 134 is abutted 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, so that the second sealing member 134 seals the gap between the first sealing surface 1313 of the first connecting member 131 and the second abutting portion 1324.

[0070] Of course, glue can also be applied to the first sealing surface 1313 of the first connecting member 131 and / or the second sealing surface 1325 of the second abutting portion 1324, and then the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutting portion 1324 can be brought closer to each other so that the glue is in contact with the first sealing surface 1313 and the second sealing surface 1325, and the second sealing member 134 can be formed after the glue solidifies.

[0071] In some embodiments, Figure 3 , Figure 4 and Figure 7 As shown, a mounting groove 1312 may be provided on the first sealing surface 1313 of the first connecting member 131, and at least part of the second sealing member 134 may be mounted in the mounting groove 1312. The mounting groove 1312 may be used to position the second sealing member 134, which is beneficial for more stably maintaining the second sealing member 134 between the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutting portion 1324.

[0072] Of course, the second sealing surface 1325 of the second abutting portion 1324 may be provided with a mounting groove 1312 , and at least a portion of the second sealing member 134 may be installed in the mounting groove 1312 to position the second sealing member 134 .

[0073] It should be noted that the installation groove 1312 can be provided on only one of the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutment portion 1324, or the installation groove 1312 can be provided on both the first sealing surface 1313 of the first connecting member 131 and the second sealing surface 1325 of the second abutment portion 1324, which can be determined according to the structure of the first connecting member 131 and the limiting member 132.

[0074] In some embodiments, Figure 6 and Figure 7 As shown, the second abutting portion 1324 can be extended along the circumference of the through hole 1200, and the second sealing member 134 can also be extended along the circumference of the through hole 1200, so as to improve the sealing effect of the second sealing member 134 on the second abutting portion 1324 and the abutting surface 1311. Specifically, the second abutting portion 1324 can be extended along the circumference of the through hole 1200 to form an annular structure, and the second sealing member 134 can be extended along the circumference of the through hole 1200 to form an annular structure. Correspondingly, the first sealing surface 1313 and the second sealing surface 1325 are annular structures extending along the circumference of the through hole 1200.

[0075] In some embodiments, 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 is understandable 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 the limiting effect of other components on the limiting portion 1323 and the second abutting portion 1324 is weak. 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.

[0076] In the embodiment of the present application, by connecting the second abutment portion 1324 and the limiting portion 1323 of the limiting member 132 to the two 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 to a certain extent, 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 second abutment portion 1324 and the abutment surface 1311 of the first connecting member 131.

[0077] Of course, the first abutment portion 1324 and the limiting portion 1323 of the limiting member 132 can also be connected to the two sides of the second abutment 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 abutment 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 stopper 132 extends along the circumference of the through hole 1200 and is in a cylindrical structure. The stopper 1323 is convexly arranged on the outer circumferential surface of the first abutting portion 1322 and extends along the circumference of the first abutting portion 1322 and is in an annular plate-like structure. The stopper 1323 is located at one end of the first abutting portion 1322 away from the first connecting member 131, so that the stopper 1323 maintains a certain distance from the abutting surface 1311 of the first connecting member 131, so as to facilitate the installation portion 121 of the bottom guard plate 120 to be installed between the stopper 1323 and the abutting surface 1311 of the first abutting member.

[0079] The second abutting portion 1324 is convexly arranged on the inner circumferential surface of the first abutting portion 1322, and extends along the circumferential direction of the first abutting portion 1322 to form an annular plate-like structure. The second abutting portion 1324 is located at one end of the first abutting portion 1322 close to the first connecting member 131, so as to reduce the distance between the second abutting portion 1324 and the abutting surface 1311 of the first connecting member 131, which is conducive to reducing the thickness of the second sealing member 134 and improving the sealing effect of the second sealing member 134 on the gap between the second abutting portion 1324 and the abutting surface 1311 of the first connecting member 131. The first sealing surface 1313 of the second abutting portion 1324 is flush with the surface of the first abutting portion 1322 on one side facing the abutting surface 1311, and forms a step structure with the surface of the limiting portion 1323 on the side facing the mounting portion 121.

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

[0081] The connecting portion 1351 of the second connecting member 135 can be located at the side of the stopper 132 away from the abutting surface 1311 of the first connecting member 131, and abut against the stopper 132, so that the stopper 132 is connected to the first connecting member 131. By abutting the connecting portion 1351 of the second connecting member 135 against the side of the stopper 132 away from the first connecting member 131, the stopper 132 can be restricted from moving in a direction away from the first connecting member 131, so that the limiting portion 1323 of the limiting member 132 can stably restrict the mounting portion 121 of the bottom guard plate 120 from moving in a direction away from the first connecting member 131.

[0082] In some embodiments, the connecting portion 1351 of the second connecting member 135 can be located at a 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 making the connecting portion 1351 of the second connecting member 135 abut against the side of the first abutting portion 1322 of the limiting member 132 away from the first connecting member 131, a thrust can be applied to the first abutting portion 1322, so that the first abutting portion 1322 of the limiting member 132 can be kept in abutment with the abutting surface 1311 of the first connecting member 131 more stably.

[0083] In some embodiments, Figures 3 to 7As shown, the stopper 132 is provided with a through hole 1320, and the second connecting member 135 includes a fixing portion 1353 connected to the connecting portion 1351, and the fixing portion 1353 passes through the through hole 1320 of the stopper 132 and is connected to the first connecting member 131. Specifically, the first abutting portion 1322 of the stopper 132 is arranged in a cylindrical shape. The through hole 1320 of the stopper 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 stopper 132 is convexly arranged on the inner circumferential surface of the through hole 1320, and extends along the circumferential direction of the through hole 1320 to form an annular structure. The fixing portion 1353 of the second connecting member 135 passes through the through hole 1320 and the second abutting portion 1324 and is connected to the first connecting member 131. The connecting portion 1351 is arranged at one end of the fixing portion 1353 away from the first connecting member 131. The connecting portion 1351 extends along the circumference of the fixing portion 1353 to form a ring structure.

[0084] The fixing portion 1353 of the second connecting member 135 can be threadedly connected to the first connecting member 131. Specifically, an external thread is provided on the outer peripheral surface of the fixing portion 1353, and a threaded hole adapted to the external thread of the fixing portion 1353 is opened at one end of the first connecting member 131 close to the second connecting member 135. The fixing portion 1353 is threadedly connected to the first connecting member 131 by screwing the external thread of the fixing portion 1353 of the second connecting member 135 into the threaded hole of the first connecting member 131.

[0085] Of course, a threaded hole can also be opened at one end of the fixing portion 1353 of the second connecting member 135 close to the first connecting portion 1351, and an external thread matching the threaded hole can be set at one end of the first connecting member 131 close to the second connecting member 135, and the fixing portion 1353 can be threadedly connected to the first connecting member 131 by screwing the external thread of the first connecting member 131 into the threaded hole of the fixing portion 1353 of the second connecting member 135.

[0086] In some embodiments, 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 to the first abutting portion 1322 can be provided on the surface of the limiting member 132 away from the abutting surface 1311, and a reinforcing portion 1352 is convexly provided on 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 provided with the fixing portion 1353 and the connecting portion 1351. The reinforcing portion 1352 extends along the circumference of the fixing portion 1353 to form an annular structure.

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

[0088] In other embodiments, the limiting member 132 and the second connecting member 135 may be integrally provided, and when the second connecting member 135 is connected to the first connecting member 131, the limiting member 132 and the first connecting member 131 may be connected together. Alternatively, the limiting member 132 may include a fixing portion 1353, and the fixing portion 1353 is connected to the first connecting member 131, so that the limiting member 132 and the first connecting member 131 are connected.

[0089] like Figures 1 to 3 As shown, the mounting assembly 130 may also include a third connecting member 136, which abuts against the side of the frame 110 facing away from the bottom guard plate 120, and the first connecting member 131 passes through the frame 110 from the side of the frame 110 toward the bottom guard plate 120 to be connected to 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 plate 120 and directly or indirectly abuts against the side of the bottom guard plate 120 facing away from the frame 110, the bottom guard plate 120 can be mounted on the frame 110.

[0090] The frame 110 can be brought into contact with 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 plate 120 , so that the first connecting member 131 and the third connecting member 136 maintain a relatively fixed position with the frame 110 after being connected.

[0091] In addition, the third connecting member 136 and the first connecting member 131 can be connected together by threaded connection or snap connection. Specifically, a threaded hole is provided on the side of the third connecting member 136 facing the frame 110, and an external thread is provided on a section of the first connecting member 131 away from the bottom guard plate 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 threadedly connected together.

[0092] In some embodiments, the frame 110 includes a crossbeam 111, which is provided with a through-mounting hole 1110, the third connecting member 136 abuts against the side of the crossbeam 111 away from the bottom guard plate 120 and corresponds to the position of the mounting hole 1110, and the first connecting member 131 passes through the mounting hole 1110 and is fixedly connected to the third connecting member 136. It is understandable that since at least a part of the gravity of the bottom guard plate 120 will be transmitted to the frame 110 through the first connecting member 131 of the mounting assembly 130, if the structural strength of the frame 110 connected to the first connecting member 131 is weak, the frame 110 is easily deformed under the action of at least a part of the gravity of the bottom guard plate 120. The embodiment of the present application can reduce the risk of deformation of the frame 110 under the action of at least a part of the gravity of the bottom guard plate 120 by fixedly connecting the first connecting member 131 and the third connecting member 136 to the crossbeam 111 with higher structural strength in the frame 110.

[0093] Specifically, the frame 110 includes a crossbeam 111 and a longitudinal beam 112, which intersect to form a plurality of installation spaces 1100. A plurality of mounting assemblies 130 are disposed on the crossbeam 111, and the plurality of mounting assemblies 130 are sequentially distributed along the length direction of the crossbeam 111.

[0094] In the embodiment of the present application, the number of mounting components 130 may be one or more, which may be determined based on 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 the weight of the bottom guard plate 120 .

[0096] An embodiment of the present application also provides a battery pack, which includes a battery pack case. The specific structure of the battery pack case refers to the above-mentioned embodiment. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

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

[0098] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack box, characterized in that: include: A frame, the frame comprising a mounting space for mounting a battery cell; A bottom guard plate, arranged opposite to the frame, the bottom guard plate comprising a through hole penetrating along the thickness direction thereof, and the bottom guard plate comprising a mounting portion located at an edge of the through hole; The mounting assembly includes a first connecting member and a limiting member connected to each other, the first connecting member is connected to the frame, the first connecting member includes a contact surface, the contact surface is located on the side of the first connecting member facing the bottom guard plate, the limiting member includes a first contact portion and a limiting portion, the first contact portion corresponds to the position of the through hole and abuts against the contact surface, the limiting portion and the contact surface are spaced apart, the mounting portion is installed between the limiting portion and the contact surface, and the distance between the limiting portion and the contact surface is greater than or equal to the thickness of the mounting portion.

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

3. The battery pack box according to claim 2, characterized in that: The first sealing member includes a first sealing portion, and the first sealing portion is located between the limiting portion and the mounting portion to seal a gap between the limiting portion and the mounting portion.

4. The battery pack box according to claim 3, characterized in that: A receiving groove is formed on a surface of the limiting portion facing the mounting portion, and the receiving groove is used to receive a portion of the first sealing portion.

5. The battery pack case according to claim 4, characterized in that: The first sealing portion extends along the circumference of the through hole and has an annular structure; and / or the accommodating groove extends along the circumference of the through hole and has an annular structure.

6. The battery pack case according to claim 4, characterized in that: 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.

7. The battery pack box according to 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 case according to claim 2, characterized in that: The first abutment portion passes through the through hole and abuts against the abutment surface; the first sealing member includes a second sealing portion, which is located between the outer circumferential surface of the first abutment portion and the inner circumferential surface of the through hole to seal the gap between the outer circumferential surface of the first abutment portion and the inner circumferential surface of the through hole.

9. The battery pack case according to claim 8, characterized in that: The second sealing portion extends along the circumference of the through hole and has an annular structure.

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

11. The battery pack case according to claim 10, characterized in that: The first connecting member includes a first sealing surface, which is located on the side of the first connecting member facing the bottom guard plate; the limiting member includes a second abutting portion, which includes a second sealing surface arranged opposite to the first sealing surface; the second sealing member is arranged between the first sealing surface and the second sealing surface to seal the gap between the limiting member and the first connecting member.

12. The battery pack case according to claim 11, characterized in that: The first sealing surface and / or the second sealing surface is provided with a mounting groove, and at least a portion of the second sealing member is mounted in the mounting groove.

13. The battery pack case according to claim 11, characterized in that: The second sealing member extends along the circumference of the through hole to form an annular structure, and the second abutting portion extends along the circumference of the through hole to form an annular structure.

14. The battery pack case according to claim 11, characterized in that: The second abutting portion is located at a side of the first abutting portion away from the limiting portion.

15. The battery pack case according to any one of claims 1 to 14, characterized in that: 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.

16. The battery pack case according to any one of claims 1 to 14, characterized in that: The mounting portion extends along the circumference of the through hole and has an annular structure.

17. The battery pack case according to any one of claims 1 to 14, characterized in that: The mounting assembly includes a second connecting member connected to the first connecting member, the second connecting member includes a connecting portion, the connecting portion is located on the side of the limiting member away from the abutting surface, and abuts against the limiting member to connect the limiting member to the first connecting member.

18. The battery pack case according to claim 17, characterized in that: The connecting portion is located at a side of the first abutting portion away from the abutting surface, and abuts against the first abutting portion.

19. The battery pack case according to claim 17, characterized in that: The limiting member is provided with a through hole, the second connecting member includes a fixing portion connected to the connecting portion, and the fixing portion passes through the through hole and is connected to the first connecting member; A groove extending from the edge of the through hole to the first abutting portion is formed on the surface of the limiting member away from the abutting surface; a reinforcing portion is protruding from the side of the connecting portion facing the limiting member, the reinforcing portion is integrally connected to the fixing portion, and at least part of the reinforcing portion is accommodated in the groove.

20. The battery pack case according to any one of claims 1 to 14, characterized in that: The mounting assembly also includes a third connecting member, which is in contact with a side of the frame facing away from the bottom guard plate, and the first connecting member passes through the frame from a side of the frame toward the bottom guard plate to be connected to the third connecting member.

21. The battery pack case according to claim 20, characterized in that: The frame includes a crossbeam having a through mounting hole, the third connecting member abuts against a side of the crossbeam away from the bottom guard plate and corresponds to the position of the mounting hole, and the first connecting member passes through the mounting hole and is fixedly connected to the third connecting member.

22. A battery pack, characterized in that: include: A battery pack case, wherein the battery pack case is the battery pack case according to any one of claims 1 to 21; The battery cell is installed in the installation space of the battery pack box.

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