Protective plate, battery box, battery module, and battery pack

Abstract

The present application provides a protective plate, a battery box, a battery module, and a battery pack. The protective plate comprises a first protective layer, a reinforcing layer, a cushioning layer, and a second protective layer that are stacked in a first direction; the reinforcing layer and the cushioning layer are stacked between the first protective layer and the second protective layer; the cushioning layer comprises a plurality of first cushioning grooves and a plurality of second cushioning grooves, the plurality of first cushioning grooves and the plurality of second cushioning grooves are distributed on two opposite sides of the cushioning layer, and the plurality of first cushioning grooves and the plurality of second cushioning grooves are distributed in a staggered manner.

Description

Guard plate, battery box, battery module and battery pack

[0001] This application claims priority to Chinese Patent Application No. 202422321813.2, filed on September 23, 2024, Chinese Patent Application No. 202422341284.2, filed on September 24, 2024, and Chinese Patent Application No. 202422409811.9, filed on September 30, 2024, all of which are incorporated by reference in their entirety. TECHNICAL FIELD

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

[0003] In the related art, the battery box of the battery pack is provided with a guard plate to protect the battery module or other components in the battery box, thereby reducing the risk of damage to the battery module or other components in the battery box after the bottom of the battery box is hit, and improving the safety of the battery pack. SUMMARY

[0004] However, as the safety requirements of the battery pack become higher and higher, the anti-impact ability of the guard plate in the related art is weak and cannot meet the requirements.

[0005] The present application provides a guard plate. It comprises a first protective layer, a reinforcing layer, a buffer layer and a second protective layer stacked in a fourth direction, wherein the reinforcing layer and the buffer layer are stacked between the first protective layer and the second protective layer.

[0006] The buffer layer comprises a plurality of first buffer grooves and a plurality of second buffer grooves, the plurality of first buffer grooves and the second buffer grooves are distributed on opposite sides of the buffer layer, and the plurality of first buffer grooves and the plurality of second buffer grooves are distributed in a staggered manner.

[0007] The present application also provides a battery box. It comprises:

[0008] The box body comprises a receiving cavity for accommodating the battery module and the foaming glue, and a mounting port in communication with the receiving cavity is formed on one side of the box body;

[0009] The box cover assembly comprises a cover plate and a separation layer, the cover plate is connected to the box body and covers the mounting port, and the separation layer is arranged on the plate surface of the cover plate facing the receiving cavity, and the separation layer is arranged to separate at least part of the plate surface from the foaming glue in the receiving cavity.

[0010] The present application also provides a battery module. It comprises:

[0011] The battery assembly comprises at least one battery pack, and the battery pack comprises a plurality of battery cells arranged along a fourth direction, each of the battery cells extending along a fifth direction, and the fourth direction and the fifth direction form an angle.

[0012] The support assembly comprises two supports arranged oppositely, and two ends of each of the battery cells are supported on the two supports.

[0013] At least one of the supports is provided with a first fixing hole at two ends along the fourth direction, and a fixing sleeve is arranged in the first fixing hole, the fixing sleeve is arranged to be sleeved on a fastener and fixedly connected with the fastener.

[0014] The application also provides a battery pack, comprising:

[0015] The battery box comprises a containing cavity.

[0016] The battery module is the battery module as described above, and the battery module is installed in the containing cavity. Advantages

[0017] The baffle provided by the application can improve the rigidity of the buffer layer, and the bottom of the first buffer groove and the bottom of the second buffer groove can produce greater elastic deformation after being impacted by external force and are not easy to be damaged. At the same time, the bottom of the first buffer groove and the bottom of the second buffer groove can also transmit the impact force received to the groove walls of the first buffer groove and the second buffer groove, and absorb the impact force through the groove walls of the first buffer groove and the second buffer groove, thereby improving the anti-impact capacity of the buffer layer. When the baffle bears greater impact force, it can effectively buffer.

[0018] The battery box provided by the application can separate at least part of the plate surface from the foaming glue in the containing cavity by arranging the isolation layer on the plate surface of the box cover facing the side of the containing cavity of the box body, thereby reducing the bonding strength between the cover plate and the foaming glue. When the cover plate is disassembled from the box body, the isolation layer can be retained on the foaming glue, or the isolation layer can be separated from the foaming glue, or the isolation layer can be torn, part of the isolation layer remaining on the foaming glue and the other part remaining on the plate surface of the cover plate, so that the disassembly of the cover plate is more convenient, and the foaming glue and other parts are not easy to be damaged during the disassembly of the cover plate, which is conducive to reducing the maintenance cost of the battery pack.

[0019] The battery module provided in the application can be quickly fixed with the battery box through the following steps: the first fixing hole is arranged at both ends of the at least one support along the fourth direction, the fixing sleeve is embedded in the first fixing hole, when the battery module is connected with the battery box, the fastener is inserted into the fixing sleeve, the fixing sleeve is sleeved on the fastener, the fastener is fixedly connected with the fixing sleeve, and the fastener is connected with the battery box, so that the support can be quickly fixed with the battery box, and the operation is very convenient. At the same time, the fastener can be directly connected with the support, the fastening force of the fastener on the support is too large, the support is deformed, and even the fastening of the fastener on the support is invalid, so that the installation stability of the battery module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural schematic diagram of one embodiment of the guard plate provided in the application;

[0021] Fig. 2 is a sectional view along A-A direction in Fig. 1;

[0022] Fig. 3 is an enlarged view of A in Fig. 2;

[0023] Fig. 4 is another angle view of the guard plate provided in the application;

[0024] Fig. 5 is a sectional view along B-B direction in Fig. 4;

[0025] Fig. 6 is an enlarged view of B in Fig. 5;

[0026] Fig. 7 is a three-dimensional schematic diagram of one embodiment of the battery pack provided in the application;

[0027] Fig. 8 is an exploded structural schematic diagram of the battery pack provided in the application;

[0028] Fig. 9 is a sectional view along C-C direction in Fig. 7;

[0029] Fig. 10 is an enlarged view of C in Fig. 9;

[0030] Fig. 11 is a structural schematic diagram of one embodiment of the box cover assembly provided in the application;

[0031] Fig. 12 is an exploded structural schematic diagram of one embodiment of the box cover assembly provided in the application;

[0032] Fig. 13 is a structural schematic diagram of one embodiment of the battery module provided in the application;

[0033] Fig. 14 is an exploded structural schematic diagram of one embodiment of the battery module provided in the application;

[0034] Fig. 15 is another angle view of the battery module provided in the application;

[0035] Fig. 16 is a structural schematic diagram of one embodiment of the support provided by the present application;

[0036] Fig. 17 is an enlarged view of D in Fig. 16.

[0037] Legend of reference signs:

[0038] guard 1000; second fixing hole 1001; first protective layer 1100; reinforcing layer 1200; buffer layer 1300; first buffer groove 131; second buffer groove 132; connecting part 133; second protective layer 1400; buffer protrusion 141; second accommodating groove 142; buffer group 1500; buffer piece 151; first direction P; second direction Q; third direction O;

[0039] battery pack 1; battery box 110; box body 1110; accommodating cavity 1111a; mounting port 1112a; bottom plate 1113; side plate 1114; connecting flange 1115; foaming glue 112; box cover assembly 113; cover plate 1131; plate surface 1132; sealing area 1133; isolation area 1134; isolation layer 1135; sealing section 1136; sealing piece 114; sealing part 1141;

[0040] battery module 10; battery assembly 11; battery group 111; battery cell 1111; pole 1112; support assembly 120; support 121; connecting hole 1210; positioning groove 1211; avoiding hole 1212; glue accommodating groove 1213; connecting glue 1214; fixing part 1215; first fixing hole 1216; glue groove 1217; accommodating part 1218; first accommodating groove 1219; fixing sleeve 130; sticking piece 140; conductive piece 150; busbar 160; connecting piece 161; insulating sheet 170; fourth direction X; fifth direction Y; height direction Z. Embodiments of the present application

[0041] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or 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.

[0042] 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.

[0043] 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 description and have no special meaning.

[0044] The present application provides a protective plate, a battery box, a battery module and a battery pack, which are described in detail as follows.

[0045] Firstly, the present application provides a protective plate.

[0046] FIG. 1 is a structural schematic diagram of an embodiment of the protective plate provided by the present application. FIG. 2 is a sectional view along the direction A in FIG. 1. FIG. 3 is an enlarged view of A in FIG. 2. As shown in FIGS. 1-3, the protective plate 1000 comprises a first protective layer 1100, a reinforcing layer 1200, a buffer layer 1300 and a second protective layer 1400 which are stacked along a first direction P, and the reinforcing layer 1200 and the buffer layer 1300 are stacked between the first protective layer 1100 and the second protective layer 1400.

[0047] The buffer layer 1300 comprises a plurality of first buffer grooves 131 and a plurality of second buffer grooves 132, the plurality of first buffer grooves 131 and the plurality of second buffer grooves 132 are distributed on opposite sides of the buffer layer 1300, and the plurality of first buffer grooves 131 and the plurality of second buffer grooves 132 are distributed in a staggered manner.

[0048] The buffer layer 1300 provided by the embodiment of the present application can improve the rigidity of the buffer layer 1300 and enable the bottom of the first buffer groove 131 and the bottom of the second buffer groove 132 to generate greater elastic deformation after being impacted by external force and not be easily damaged. Meanwhile, the bottom of the first buffer groove 131 and the bottom of the second buffer groove 132 can also transmit the impact force received to the groove walls of the first buffer groove 131 and the second buffer groove 132 and absorb the impact force through the groove walls of the first buffer groove 131 and the second buffer groove 132, thereby improving the anti-impact capability of the buffer layer 1300 and enabling effective buffering when the protective plate 1000 bears greater impact force.

[0049] It should be noted that when the protective plate 1000 is used for a battery box (not shown in the figure) of a battery pack (not shown in the figure), the side of the first protective layer 1100 of the protective plate 1000 away from the reinforcing layer 1200 can face the box body of the battery box, or the side of the second protective layer 1400 of the protective plate 1000 away from the reinforcing layer 1200 can face the box body of the battery box.

[0050] In some embodiments, as shown in FIG. 3, the plurality of first buffer grooves 131 and the plurality of second buffer grooves 132 can be alternately distributed along the second direction Q, and the second direction Q forms an angle with the first direction P, so that the plurality of first buffer grooves 131 and the plurality of second buffer grooves 132 are distributed in a staggered manner. Moreover, the groove walls of the buffer layer 1300 arranged to absorb impact force are sequentially distributed along the second direction Q, which is conducive to improving the impact force absorption effect of each region of the buffer layer 1300.

[0051] In some embodiments, the first buffer groove 131 and the second buffer groove 132 can extend along the third direction Q, and the first direction P, the second direction Q and the third direction Q form an angle with each other, so as to increase the length of the bottom and the groove wall of the first buffer groove 131 and the second buffer groove 132 and further improve the buffering effect of the buffer layer 1300.

[0052] In addition, in the second direction Q, the width of the first buffer groove 131 can be greater than the width of the second buffer groove 132. In this way, when the protective plate 1000 is used for a battery box, the side of the first protective layer 1100 of the protective plate 1000 away from the reinforcing layer 1200 can face the box body of the battery box, and the bottom of the first buffer groove 131 used to bear impact force has a wider width and has a better buffering effect on impact force.

[0053] Specifically, the first buffer groove 131 and the second buffer groove 132 can be formed through the buffer layer 1300 along the third direction Q, respectively. The first buffer groove 131 and the second buffer groove 132 can be formed by bending, stamping or other methods on the plate-shaped component. The material of the buffer layer 1300 can be stainless steel or other metals, so that the buffer layer 1300 has high rigidity and buffering effect. In addition, the reinforcing layer 1200 can also be stainless steel or other metals, so that the reinforcing layer 1200 has high rigidity and strength.

[0054] In other embodiments, a plurality of first buffer grooves 131 can be distributed in a matrix or other distribution manner on one side of the buffer layer 1300, and a plurality of second buffer grooves 132 can be distributed in a matrix or other distribution manner on the other side of the buffer layer 1300, and the plurality of first buffer grooves 131 and the plurality of second buffer grooves 132 are distributed in a staggered manner. Among them, the cross-sectional shape of the first buffer groove 131 and / or the second buffer groove 132 in the cross section perpendicular to the first direction P can be polygonal, circular, etc.

[0055] In some embodiments, the thickness of the buffer layer 1300 can be greater than or equal to 2mm and less than or equal to 5mm, that is, the maximum distance between the side of the buffer layer 1300 towards the reinforcing layer 1200 and the side of the buffer layer 1300 towards the second protective layer 1400 is greater than or equal to 2mm and less than or equal to 5mm, so that the buffer layer 1300 has better buffering effect and does not cause the overall thickness of the protective plate 1000 to be too thick. The thickness of the buffer layer 1300 can be 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, etc., which can be determined according to the required impact force and the thickness requirement of the protective plate 1000.

[0056] In some embodiments, the wall thickness of the first buffer groove 131 can be greater than or equal to 0.6mm and less than or equal to 1mm, so that the wall of the first buffer groove 131 can better absorb the impact force and does not cause the weight of the buffer layer 1300 to be too large. The wall thickness of the first buffer groove 131 can be 0.65mm, 0.7mm, 0.8mm, 0.9mm, etc., which can be determined according to the required impact force and the weight requirement of the protective plate 1000.

[0057] In addition, the wall thickness of the second buffer groove 132 can be greater than or equal to 0.6mm and less than or equal to 1mm, so that the wall of the second buffer groove 132 can better absorb the impact force and does not cause the weight of the buffer layer 1300 to be too large. The wall thickness of the second buffer groove 132 can be 0.65mm, 0.7mm, 0.8mm, 0.9mm, etc., which can be determined according to the required impact force and the weight requirement of the protective plate 1000.

[0058] It should be noted that the thickness of the buffer layer 1300, the wall thickness of the first buffer groove 131, and the wall thickness of the second buffer groove 132 can all meet the above size requirements, or only one or two of them can meet the above size requirements, as long as they can have a good buffering effect on the impact force.

[0059] In addition, when the first buffer groove 131 and the second buffer groove 132 are separated by only one side wall, the groove wall of the first buffer groove 131 and the groove wall of the second buffer groove 132 share part of the groove wall. The wall thickness of the first buffer groove 131 and the wall thickness of the second buffer groove 132 can be the same or different.

[0060] In some embodiments, as shown in FIG. 3, the buffer layer 1300 can be located between the reinforcing layer 1200 and the second protective layer 1400, and the second buffer groove 132 is located on the side of the buffer layer 1300 facing the second protective layer 1400. When the guard plate 1000 is used for a battery box, the side of the first protective layer 1100 of the guard plate 1000 facing away from the reinforcing layer 1200 can face the box body of the battery box, and the side of the second protective layer 1400 facing away from the buffer layer 1300 can be used to bear the impact force and transmit the impact force to the buffer layer 1300, so that the buffer layer 1300 can better buffer the impact force.

[0061] Among them, a buffer protrusion 141 can be further provided on the side of the second protective layer 1400 facing the buffer layer 1300, and the buffer protrusion 141 fills at least part of the second buffer groove 132. By making the second protective layer 1400 form a buffer protrusion 141 filling the second buffer groove 132, when the corresponding part of the second protective layer 1400 and the second buffer groove 132 is subjected to a larger impact force, the impact force can be transmitted to the buffer layer 1300 in time through the buffer protrusion 141, avoiding the problem of damage to the corresponding part of the second protective layer 1400 and the second buffer groove 132 when subjected to a larger impact force.

[0062] Specifically, the side of the second protective layer 1400 facing the buffer layer 1300 is provided with a plurality of buffer protrusions 141, the plurality of buffer protrusions 141 are sequentially distributed along the second direction Q, and each buffer protrusion 141 extends along the third direction Q. Each buffer protrusion 141 fills one second buffer groove 132.

[0063] As shown in FIGS. 4 to 6, the guard plate 1000 further comprises a second fixing hole 1001, which penetrates the first protective layer 1100, the reinforcing layer 1200, the connecting part 133 of the buffer layer 1300, and the second protective layer 1400 along the first direction P. Thus, the second fixing hole 1001 can be fixedly connected with the box body through a fastener.

[0064] In some embodiments, the buffer layer 1300 can include a connecting portion 133 at the bottom of the second buffer groove 132, and the second fixing hole 1001 penetrates through the connecting portion 133 of the buffer layer 1300. Since the connecting portion 133 abuts against the reinforcing layer 1200, the risk of deformation of the buffer layer 1300 caused by excessive fastening force exerted by the fastener on the buffer layer 1300 can be reduced.

[0065] In some embodiments, the second protective layer 1400 can be provided with a second accommodating groove 142 on the side thereof facing away from the buffer layer 1300, and the second fixing hole 1001 is provided with an opening at the bottom of the second accommodating groove 142. Thus, when the fastener (not shown in the figure) is connected to the cabinet through the second fixing hole 1001, a part of the fastener can be accommodated in the second accommodating groove 142, thereby reducing the height of the fastener protruding from the side of the second protective layer 1400 facing away from the buffer layer 1300. The fastener is not protruding from the side of the second protective layer 1400 facing away from the buffer layer 1300, which is conducive to reducing the risk of the fastener being impacted by external force.

[0066] In some embodiments, the thickness of the first protective layer 1100 can be greater than or equal to 0.6 mm and less than or equal to 1 mm, so that the first protective layer 1100 has good strength and protection effect, and does not cause the overall thickness of the protective plate 1000 to be too thick. The thickness of the first protective layer 1100 can be 0.65 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc., which can be determined according to the material, strength requirement, etc. of the first protective layer 1100.

[0067] In addition, the material of the first protective layer 1100 can include insulating materials such as resin and / or glass fiber, so that the first protective layer 1100 has good corrosion resistance, insulation and strength. At the same time, the first protective layer 1100 can be better combined with the reinforcing layer 1200. Specifically, the first protective layer 1100 can be adsorbed on the surface of the reinforcing layer 1200 facing away from the buffer layer 1300 through a thermoplastic process, etc.

[0068] In some embodiments, the thickness of the second protective layer 1400 can be greater than or equal to 0.6 mm and less than or equal to 1 mm, so that the second protective layer 1400 has good strength and protection effect, and does not cause the overall thickness of the protective plate 1000 to be too thick. The thickness of the second protective layer 1400 can be 0.65 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc., which can be determined according to the material, strength requirement, etc. of the second protective layer 1400.

[0069] In addition, the material of the second protective layer 1400 can include resin and / or glass fiber and other insulating materials, so that the second protective layer 1400 has good corrosion resistance, insulation and strength. At the same time, it can also make the second protective layer 1400 better combined with the reinforcing layer 1200. Specifically, the second protective layer 1400 can be adsorbed on the surface of the buffer layer 1300 away from the reinforcing layer 1200 by a thermoplastic process.

[0070] In some embodiments, the thickness of the reinforcing layer 1200 can be greater than or equal to 0.8mm and less than or equal to 1.2mm, so that the reinforcing layer 1200 has high rigidity and does not cause the overall thickness of the protective plate 1000 to be too thick. The thickness of the reinforcing layer 1200 can be 0.85mm, 0.8mm, 0.9mm, 1mm, 1.5mm, etc., which can be determined according to the material, strength requirements and other parameters of the reinforcing layer 1200. In addition, the material of the reinforcing layer 1200 can be stainless steel or other metals, so that the reinforcing layer 1200 has high rigidity and strength.

[0071] In some embodiments, as shown in FIGS. 1-3, a plurality of buffers 151 can be provided on the side of the first protective layer 1100 away from the reinforcing layer 1200. Thus, the plurality of buffers 151 can form a buffer between the first protective layer 1100 and the battery module or other components in the box, preventing the buffer layer 1300 from directly transmitting the impact force to the battery module or other components in the box through the reinforcing layer 1200 and the first protective layer 1100, thereby preventing damage to the battery module or other components.

[0072] The buffer layer 1300 includes a connecting portion 133 at the bottom of the second buffer groove. The buffer 151 corresponds in position to the connecting portion 133. It can be understood that when the second protective layer 1400 of the protective plate 1000 is impacted, the impact force will be transmitted to the connecting portion 133 through the groove walls of the first buffer groove 131 and the second buffer groove 132 of the buffer layer 1300. By making the buffer 151 correspond in position to the connecting portion 133, the impact force transmitted to the connecting portion 133 can be effectively buffered, which is beneficial to further improve the anti-impact effect of the protective plate 1000.

[0073] Specifically, the plurality of buffers 151 can be divided into a plurality of buffer groups 1500, each buffer group 1500 corresponding to a different connecting portion 133, and the plurality of buffers 151 of the buffer group 1500 being spaced apart along the extension direction of the connecting portion 133, thereby improving the buffering effect of the plurality of buffers 151 on the impact force at different positions of the protective plate 1000.

[0074] The battery box provided in the embodiments of the present application also includes the protective plate, and the specific structure of the protective plate can refer to the above embodiments. Since the battery box adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0075] The battery box (not shown in the figure) can include a box body and the protective plate 1000. The box body includes a receiving cavity configured to accommodate the battery module. The protective plate 1000 is connected to the box body. The structure of the protective plate 1000 can refer to the above embodiments. The first protective layer 1100 of the protective plate 1000 faces away from the side of the reinforcing layer 1200 and faces the box body.

[0076] In the related art, after the battery module of the battery pack is installed in the battery box, foaming glue is filled between the battery module and the inner wall of the battery box to better protect the battery module. However, the foaming glue can be bonded with the cover of the battery box, which makes it difficult to disassemble the cover of the battery box and affects the maintenance of the devices in the battery box.

[0077] Therefore, the embodiments of the present application also provide a battery box.

[0078] FIG. 7 is a perspective view of one embodiment of the battery pack provided by the embodiments of the present application. FIG. 8 is an exploded structural view of the battery pack provided by the embodiments of the present application. FIG. 9 is a sectional view along the direction A of FIG. 7. FIG. 10 is an enlarged view of C in FIG. 9. As shown in FIGS. 7 to 10, the battery pack 1 includes a battery box 110 and a battery module (not shown in the figure). The battery box 110 includes a box body 1110 and a cover assembly 113. The box body 1110 includes a receiving cavity 1111a configured to accommodate the battery module and foaming glue 112. On one side of the box body 1110, there is a mounting opening 1112a communicating with the receiving cavity 1111a. The mounting opening 1112a is configured to allow the battery module and other components of the battery pack 1 to be installed in the receiving cavity 1111a. The cover assembly 113 includes a cover plate 1131 connected to the box body 1110 and covering the mounting opening 1112a, thereby protecting the battery module and other components in the box body 1110.

[0079] Continuing to refer to FIGS. 8 to 10, the battery pack 1 also includes the foaming glue 112, which is filled in the space between the battery module and the battery box 110 to further improve the protection effect of the battery module. Specifically, after the battery module and other components of the battery pack 1 are installed in the receiving cavity 1111a of the box body 1110, the foaming glue 112 can be sprayed in the receiving cavity 1111a, and the cover plate 1131 is arranged at the mounting opening 1112a of the box body 1110, so that the cover plate 1131 covers the mounting opening 1112a. After the foaming glue 112 expands, it is filled between the cover plate 1131 and the box body 1110 of the battery module and the battery box 110.

[0080] The battery module can include a plurality of battery cells arranged side by side in the accommodating cavity 1111a of the box body 1110, and foaming glue 112 is filled between each battery cell and the inner circumferential surface of the accommodating cavity 1111a of the box body 1110 and the plate surface 1132 on the side of the cover plate 1131 facing the accommodating cavity 1111a.

[0081] In the related art, the foaming glue filled between the battery module and the cover and the box body of the battery box is bonded with the cover, which makes it difficult to disassemble the cover of the battery box. If the battery distribution unit (BDU), the battery management system (BMS), and other devices in the battery box fail, the cover cannot be opened for maintenance of these devices, and the cover can only be forcibly disassembled, which can easily cause damage to other components of the battery pack, or the battery pack is directly replaced, increasing the after-sales cost of the battery pack.

[0082] To improve the above problems, the embodiments of the present application provide a battery box, as shown in FIGS. 8 to 12, the battery box 110 includes a cover assembly 113, the cover assembly 113 includes a cover plate 1131 and a separation layer 1135, the cover plate 1131 is connected with the box body 1110, and the cover plate 1131 covers the mounting port 1112a of the box body 1110, so that the accommodating cavity 1111a of the box body 1110 is a closed space. The separation layer 1135 is arranged on the plate surface 1132 on the side of the cover plate 1131 facing the accommodating cavity 1111a, and the separation layer 1135 is arranged to separate at least part of the plate surface 1132 from the foaming glue 112 in the accommodating cavity 1111a.

[0083] The battery box 110 provided by the embodiments of the present application can separate at least part of the plate surface 1132 from the foaming glue 112 in the accommodating cavity 1111a by arranging the separation layer 1135 on the side plate 1114 of the cover plate 1131 facing the accommodating cavity 1111a of the box body 1110, which can reduce the bonding strength between the cover plate 1131 and the foaming glue 112. When the cover plate 1131 is disassembled from the box body 1110, the separation layer 1135 can be retained on the foaming glue 112, or the separation layer 1135 can be separated from the foaming glue 112, or the separation layer 1135 can be torn, part of the separation layer 1135 is retained on the foaming glue 112, and the other part is retained on the plate surface 1132 of the cover plate 1131, so that the disassembly of the cover plate 1131 is more convenient, and the foaming glue 112 and other parts are not easily damaged during the disassembly of the cover plate 1131, which is conducive to reducing the maintenance cost of the battery pack 1.

[0084] The isolation layer 1135 can be a tearable film. When the cover plate 1131 is detached from the box body 1110, the isolation layer 1135 is more easily torn, so that the cover plate 1131 is subjected to less pulling force and is more easily detached from the box body 1110.

[0085] In some embodiments, the material of the isolation layer 1135 can include one or more of Polyethylene Glycol Terephthalate (PET), Polyvinyl chloride (PVC), and Thermoplastic Polyurethane (TPU), so that the isolation layer 1135 is more easily torn. Moreover, the adhesion strength between the isolation layer 1135 and the foam adhesive 112 is reduced, so that the isolation layer 1135 is more easily separated from the foam adhesive 112 when the cover plate 1131 is detached from the box body 1110, and the cover plate 1131 is more easily detached.

[0086] In some embodiments, the isolation layer 1135 can be adhered to the plate surface 1132 of the cover plate 1131, so that the connection between the isolation layer 1135 and the cover plate 1131 is more stable, and the problem that part or all of the plate surface 1132 of the cover plate 1131 is directly adhered to the foam adhesive 112 during the expansion of the foam adhesive 112 is reduced.

[0087] The adhesion strength between the isolation layer 1135 and the plate surface 1132 of the cover plate 1131 can be less than the adhesion strength between the isolation layer 1135 and the foam adhesive 112. Thus, when the cover plate 1131 is detached from the box body 1110, the isolation layer 1135 is more easily separated from the plate surface 1132 of the cover plate 1131, so that the cover plate 1131 is more easily detached, and the isolation layer 1135 is more easily kept as a whole.

[0088] Alternatively, the adhesion strength between the isolation layer 1135 and the plate surface 1132 can be greater than the adhesion strength between the isolation layer 1135 and the foam adhesive 112. Thus, when the cover plate 1131 is detached from the box body 1110, the isolation layer 1135 is more easily separated from the foam adhesive 112, so that the cover plate 1131 is more easily detached, and the isolation layer 1135 is more easily kept as a whole.

[0089] In other embodiments, the isolation layer 1135 can also be formed by coating on the plate surface 1132 of the cover plate 1131 on the side facing the accommodating cavity 1111a of the box body 1110. Alternatively, the isolation layer 1135 can be adsorbed on the plate surface 1132 of the cover plate 1131 on the side facing the accommodating cavity 1111a of the box body 1110 by electrostatic adsorption or vacuum adsorption.

[0090] In some embodiments, the thickness of the isolation layer 1135 can be less than or equal to 0.5 mm, so as to avoid the problem that the isolation layer 1135 is not easy to be torn when the cover plate 1131 is detached from the box body 1110, thereby causing the cover plate 1131 to be difficult to separate from the foaming glue 112. The thickness of the isolation layer 1135 can be 0.45 mm, 0.35 mm, 0.25 mm, etc., which can be determined according to the material of the isolation layer 1135.

[0091] In addition, the thickness of the isolation layer 1135 can be greater than or equal to 0.2 mm, so as to make the isolation layer 1135 have a certain strength, and reduce the risk of damage of the isolation layer 1135 during the process of arranging the isolation layer 1135 on the plate surface 1132 of the cover plate 1131 on the side facing the accommodating cavity 1111a. The thickness of the isolation layer 1135 can be 0.3 mm, 0.4 mm, etc., which can be determined according to the material of the isolation layer 1135.

[0092] FIG. 11 is a structural schematic diagram of an embodiment of a box cover assembly provided by the present application. FIG. 12 is an exploded structural schematic diagram of an embodiment of a box cover assembly provided by the present application. As shown in FIGS. 9 to 12, the plate surface 1132 of the cover plate 1131 on the side facing the accommodating cavity 1111a of the box body 1110 includes a sealing area 1133. When the cover plate 1131 of the battery box 110 is connected with the box body 1110, the sealing area 1133 of the cover plate 1131 is sealingly matched with the box body 1110, so as to improve the sealing performance of the accommodating cavity 1111a in the battery box 110. A sealing member 114 can be arranged between the sealing area 1133 of the plate surface 1132 of the cover plate 1131 and the box body 1110, so as to seal the gap between the cover plate 1131 and the box body 1110.

[0093] Specifically, as shown in FIG. 8, the box body 1110 of the battery box 110 includes a bottom plate 1113, and a plurality of side plates 1114 connected to the edges of the four sides of the bottom plate 1113, which are sequentially connected along the circumference of the bottom plate 1113, and the bottom plate 1113 and the plurality of side plates 1114 enclose a containing cavity 1111a. The mounting port 1112a is located at one end of the plurality of side plates 1114 away from the bottom plate 1113. Among them, the bottom plate 1113 is a rectangular plate, and the number of side plates 1114 is four, which are distributed around the four sides of the bottom plate 1113. Each side plate 1114 is provided with a connecting flange 1115 on the side away from the containing cavity 1111a, and the plurality of connecting flanges 1115 are sequentially connected into a ring structure. The connecting flange 1115 is a plate-shaped structure arranged opposite to the sealing area 1133 of the plate surface 1132 of the cover plate 1131.

[0094] The sealing area 1133 of the plate surface 1132 of the cover plate 1131 extends along the circumference of the cover plate 1131 in a ring structure, so that the sealing area 1133 of the cover plate 1131 corresponds to the connecting flange 1115 connected into a ring structure. Among them, the sealing area 1133 includes a plurality of sealing segments 1136 sequentially connected along the cover plate 1131, and the number of the plurality of sealing segments 1136 is equal to and corresponds to the number of the plurality of connecting flanges 1115.

[0095] The sealing member 114 is arranged between the ring-shaped sealing area 1133 and the connecting flange 1115 connected into a ring structure. One side of the sealing member 114 abuts against the sealing area 1133, and the other side of the sealing member 114 abuts against the connecting flange 1115, thereby sealing the gap between the sealing area 1133 and the connecting flange 1115. Among them, the sealing member 114 is a ring structure extending along the sealing area 1133. The sealing member 114 includes a plurality of sealing portions 1141 sequentially connected along the sealing area 1133, and the number of the plurality of sealing portions 1141 is equal to and corresponds to the number of the plurality of sealing segments 1136.

[0096] It should be noted that the sealing member 114 can be arranged on the sealing area 1133 of the plate surface 1132 of the cover plate 1131 first, and when the cover plate 1131 is connected with the box body 1110, the side of the sealing member 114 away from the cover plate 1131 abuts against the side of the connecting flange 1115 facing the cover plate 1131, thereby realizing the sealing between the cover plate 1131 and the box body 1110. Alternatively, the sealing member 114 can also be arranged on the side of the connecting flange 1115 facing the cover plate 1131 first, and when the cover plate 1131 is connected with the box body 1110, the side of the sealing member 114 away from the connecting flange 1115 abuts against the sealing area 1133 of the plate surface 1132 of the cover plate 1131.

[0097] In some embodiments, the cover plate 1131 can be provided with an isolation region 1134 on the plate surface 1132 on the side of the accommodating cavity 1111a of the box body 1110, and an isolation layer 1135 is arranged on the isolation region 1134. The sealing region 1133 of the plate surface 1132 of the cover plate 1131 is located outside the periphery of the isolation region 1134. In this way, the isolation layer 1135 can be prevented from being arranged on the sealing region 1133 of the plate surface 1132 of the cover plate 1131, thereby affecting the sealing effect between the sealing region 1133 of the plate surface 1132 and the box body 1110.

[0098] In some embodiments, the sealing region 1133 can be annularly arranged along the periphery of the isolation region 1134, thereby preventing the isolation layer 1135 from affecting the sealing effect between the cover plate 1131 and the box body 1110.

[0099] In some embodiments, the sealing region 1133 can be adjacent to the isolation region 1134, so that the sealing region 1133 and the isolation region 1134 are as close as possible, so that the isolation layer 1135 and the sealing member 114 are as close as possible, the width of the gap between the sealing member 114 and the isolation layer 1135 is reduced, the area of the foaming glue 112 directly bonded to the plate surface 1132 of the cover plate 1131 through the gap between the sealing member 114 and the isolation layer 1135 is reduced, and the bonding strength between the cover plate 1131 and the foaming glue 112 is reduced as much as possible.

[0100] In some embodiments, the isolation layer 1135 can be overlapped with the projection of the plate surface 1132 on the isolation region 1134, and the sealing member 114 can be overlapped with the projection of the plate surface 1132 on the sealing region 1133, so that the isolation layer 1135 and the sealing member 114 are as close as possible. Specifically, the cover plate 1131 is a rectangular plate. The plate surface 1132 of the cover plate 1131 on the side of the accommodating cavity 1111a of the box body 1110 is a rectangular surface. The isolation region 1134 is a rectangular region. The isolation layer 1135 is also rectangular and overlaps with the isolation region 1134. The sealing region 1133 is adjacent to the periphery of the isolation region 1134, and the sealing region 1133 is annularly arranged along the periphery of the isolation region 1134. The sealing member 114 is also annularly arranged along the periphery of the isolation layer 1135, and the sealing member 114 overlaps with the sealing region 1133.

[0101] The embodiments of the present application also provide a battery pack, which comprises a battery box. The specific structure of the battery box is described in the above embodiments. Since the battery pack adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described here.

[0102] The battery pack 1 includes a battery box 110, a battery module, and foamed glue 112. The structure of the battery box 110 can refer to the above embodiments. The battery module is arranged in the accommodating cavity 1111a of the battery box 110. The foamed glue 112 is filled between the battery module and the box cover assembly 113 and the box body 1110 of the battery box 110.

[0103] The battery pack 1 provided in the embodiments of the present application can separate at least part of the plate surface 1132 from the foamed glue 112 in the accommodating cavity 1111a by arranging the isolation layer 1135 on the side plate 1114 of the box cover of the battery box 110 facing the accommodating cavity 1111a of the box body 1110, so as to reduce the bonding strength between the cover plate 1131 and the foamed glue 112. When the cover plate 1131 is disassembled from the box body 1110, the isolation layer 1135 can be retained on the foamed glue 112, or the isolation layer 1135 can be separated from the foamed glue 112, or the isolation layer 1135 can be torn, part of the isolation layer 1135 is retained on the foamed glue 112, and the other part is retained on the plate surface 1132 of the cover plate 1131, so that the disassembly of the cover plate 1131 is more convenient, and the foamed glue 112 and other parts are not easily damaged during the disassembly of the cover plate 1131, which is beneficial to reduce the maintenance cost of the battery pack 1.

[0104] In the related art, in order to reduce the height, the battery pack can adopt a battery module with horizontally arranged battery cells. That is, the length direction of the columnar structure of the battery cell is perpendicular to the height direction of the battery module, and the two ends of the battery cell are supported by two supports, and then the support of the battery module is fixedly connected with the battery box. However, the fixing of the support of the battery module and the battery box is relatively complex, which affects the assembly efficiency of the battery pack.

[0105] Therefore, the embodiments of the present application further provide a battery module.

[0106] FIG. 13 is a structural schematic diagram of one embodiment of the battery module provided by the embodiments of the present application. FIG. 14 is an exploded structural schematic diagram of one embodiment of the battery module provided by the embodiments of the present application. FIG. 15 is a view of the battery module from another angle provided by the embodiments of the present application. FIG. 16 is a structural schematic diagram of one embodiment of the support provided by the embodiments of the present application. FIG. 17 is an enlarged view of D in FIG. 16.

[0107] As shown in FIGS. 13 and 14, the battery module 10 includes a battery assembly 11 and a support assembly 120. The battery assembly 11 includes at least one battery group 111, and the battery group 111 includes a plurality of battery cells 1111 arranged along a fourth direction X, each of the battery cells 1111 extends along a fifth direction Y, and the fourth direction X and the fifth direction Y form an angle. The support assembly 120 includes two supports 121 arranged oppositely, and the two ends of each battery cell 1111 are respectively supported by the two supports 121.

[0108] By extending the plurality of battery cells 1111 of the battery module 10 along the fifth direction Y, that is, placing the plurality of battery cells 1111 of the battery module 10 horizontally, and making the length direction of the battery cell 1111 form an angle with the height direction Z of the battery module 10, the overall height of the battery module 10 can be reduced.

[0109] It should be noted that the angle formed by the fourth direction X and the fifth direction Y can be a right angle or an acute angle. The angles formed by the fourth direction X and the fifth direction Y with the height direction Z can be a right angle or an acute angle.

[0110] Among them, a positioning groove 1211 can be formed on the side of the support 121 facing the battery cell 1111, and the end of the battery cell 1111 close to the corresponding support 121 is inserted into the positioning groove 1211, so that the end of the battery cell 1111 close to the corresponding support 121 is supported on the support 121.

[0111] As shown in FIGS. 14, 16 and 17, an avoiding hole 1212 can be formed on the bottom surface of the positioning groove 1211, which penetrates the support 121 along the fifth direction Y. The avoiding hole 1212 is arranged to avoid the pole 1112 of the battery cell 1111 close to the end of the corresponding support 121, and when the end of the battery cell 1111 close to the corresponding support 121 is supported on the support 121, the pole 1112 of the battery cell 1111 is exposed through the avoiding hole 1212.

[0112] The bottom surface of the positioning groove 1211 is also provided with a connecting glue 1214, which is bonded to the end surface of the battery cell 1111 inserted into the positioning groove 1211 after the end of the battery cell 1111 close to the corresponding support 121 is inserted into the positioning groove 1211, so that the connection between the battery cell 1111 and the support 121 is more stable. A glue groove 1213 is formed on the bottom surface of the positioning groove 1211, which extends along the circumference of the avoiding hole 1212, and the connecting glue 1214 is at least partially accommodated in the glue groove 1213. The connecting glue 1214 can be formed by curing glue applied to the glue groove 1213, or can be an adhesive tape.

[0113] Continuing to refer to FIG. 14, a busbar 160 is also provided on the side of each support 121 away from the battery cell 1111, which is connected with the pole 1112 of the battery cell 1111 through the avoiding hole 1212, so as to connect the plurality of battery cells 1111 in series or parallel. An insulating sheet 170 is also provided on the side of the busbar 160 away from the support 121, which covers the busbar 160 to improve the insulation performance between adjacent two battery modules 10, and the risk of thermal runaway is lower.

[0114] Specifically, the battery assembly 11 includes a plurality of battery groups 111, the plurality of battery groups 111 are arranged along the height direction Z of the battery module 10, and the battery cells 1111 of adjacent two battery groups 111 are distributed in a staggered manner. A cooling pipe is arranged between the adjacent two battery groups 111, and the cooling pipe is arranged to cool and dissipate heat of the plurality of battery cells 1111 of the battery group 111, so as to improve the working stability of the battery cell 1111.

[0115] The busbar 160 includes a plurality of connecting pieces 161, the plurality of connecting pieces 161 are arranged along the fourth direction X, each connecting piece 161 is connected with the pole 1112 of at least one battery cell 1111, and the plurality of connecting pieces 161 can be connected in parallel or in series, so as to realize series connection or parallel connection of the plurality of battery cells 1111.

[0116] The battery module 10 provided by the embodiment of the present application supports the two ends of the battery cell 1111 by the two brackets 121, and does not need to use foaming glue to fix the battery cell 1111, which is beneficial to reduce the cost and weight of the battery module 10, and makes the disassembly of the battery module 10 more convenient, and increases the maintenance convenience of the battery module 10.

[0117] In some embodiments, as shown in FIGS. 14, 16 and 17, the first fixing hole 1216 can be arranged at one end of the at least one bracket 121 along the fourth direction X, and the fixing sleeve 130 is arranged in the first fixing hole 1216, and the fixing sleeve 130 is arranged on the fastener (not shown in the figure) and is fixedly connected with the fastener.

[0118] The embodiment of the present application arranges the first fixing hole 1216 at both ends of the at least one bracket 121 along the fourth direction X, and arranges the fixing sleeve 130 in the first fixing hole 1216, when the battery module 10 is connected with the battery box, the fastener is inserted into the fixing sleeve 130, the fixing sleeve 130 is arranged on the fastener and is fixedly connected with the fastener, and the fastener is connected with the battery box, so that the bracket 121 and the battery box can be quickly fixed, and the operation is very convenient.

[0119] At the same time, it can also avoid the case that the fastener is directly connected with the bracket 121, the fastening force of the fastener on the bracket 121 is too large, the bracket 121 is deformed, and even the fastening of the fastener on the bracket 121 is invalid, which is beneficial to improve the installation stability of the battery module 10.

[0120] In some embodiments, the fixing portion 1215 can be arranged at both ends of the bracket 121 along the fourth direction X, and the first fixing hole 1216 penetrates the fixing portion 1215. In this way, the influence of the first fixing hole 1216 arranged on the bracket 121 on the strength of the structure of the bracket 121 supporting the battery cell 1111 can be reduced, and the support stability of the bracket 121 to the battery cell 1111 can be improved.

[0121] In some embodiments, the first fixing hole 1216 can penetrate the fixing portion 1215 along the height direction Z of the battery module 10, and the fourth direction X and the fifth direction Y are respectively at an angle with the height direction Z of the battery module 10. When fixing the bracket 121 to the battery box, the battery module 10 can be placed on the bottom surface of the accommodating cavity of the battery box, and then the fastener is inserted into the part of the battery box below the fixing portion 1215 from above the fixing portion 1215 through the fixing sleeve 130, so as to fix the bracket 121 to the battery box, which is more convenient to operate.

[0122] Specifically, the fixing portion 1215 extends along the fourth direction X at both ends of the bracket 121 along the fourth direction X, respectively, and the bottom of the fixing portion 1215 and the bottom of the bracket 121 have a spacing, and the top of the fixing portion 1215 and the top of the bracket 121 have a spacing. The fixing sleeve 130 can be a nut. The material of the fixing sleeve 130 can be metal or other materials with high strength. The length of the fixing sleeve 130 is substantially the same as the depth of the first fixing hole 1216. The fastener can be a bolt, a screw, etc., which is not limited here.

[0123] In other embodiments, the first fixing hole 1216 can also penetrate the fixing portion 1215 along the fourth direction X or the fifth direction Y, which can be determined according to the structure of the battery box and the fixing portion 1215, as long as the fastener can be inserted into the fixing sleeve 130 and connected to the battery box.

[0124] In some embodiments, the first fixing hole 1216 can be provided at both ends of the two brackets 121 along the fourth direction X, so that the two brackets 121 are more convenient to fix to the battery box, further improving the assembly efficiency of the battery module 10 and the battery box.

[0125] In some embodiments, as shown in FIGS. 14 and 15, the bottom surface of at least one bracket 121 can be provided with a sticking member 140, which can be bonded to the bottom surface of the accommodating cavity of the battery box when the battery module 10 is installed in the accommodating cavity of the battery box, thereby further improving the connection strength of the bracket 121 and the battery box, and the operation is very convenient.

[0126] The adhesive member 140 is at least partially accommodated in the glue groove 1217, so that the position of the adhesive member 140 relative to the bracket 121 is stable, and the adhesion stability of the bottom surface of the bracket 121 and the bottom surface of the accommodating cavity of the battery box is improved. Moreover, by opening the glue groove 1217 on the bottom surface of the bracket 121, glue can be applied in the glue groove 1217 on the bottom surface of the bracket 121 during the connection of the battery module 10 and the battery box, and then the bottom surface of the bracket 121 is attached to the bottom surface of the accommodating cavity of the battery box. After the glue is cured, the bottom surface of the bracket 121 and the bottom surface of the accommodating cavity are bonded together.

[0127] Of course, the adhesive member 140 can be directly arranged in the glue groove 1217, so that one side surface of the adhesive member 140 is bonded to the bottom surface of the glue groove 1217, and the other side surface of the adhesive member 140 is bonded to the bottom surface of the accommodating cavity. The adhesive member 140 can be double-sided tape or other components that can be attached, which is not limited here.

[0128] In some embodiments, the adhesive member 140 can extend along the fourth direction X to increase the length of the adhesive member 140, thereby increasing the adhesion strength between the bracket 121 and the bottom surface of the accommodating cavity of the battery box.

[0129] Specifically, the bottom surface of the bracket 121 is a plane. The length of the adhesive member 140 located on the bottom surface of the bracket 121 along the fourth direction X is substantially the same as the length of the bracket 121 along the fourth direction X, so as to as far as possible to prolong the length of the adhesive member 140 located on the bottom surface of the bracket 121.

[0130] In other embodiments, the number of adhesive members 140 arranged on the bottom surface of the bracket 121 can be multiple, and the multiple adhesive members 140 are arranged at intervals along the fourth direction X. When the battery module 10 is installed in the accommodating cavity of the battery box, the multiple adhesive members 140 located on the bottom surface of the bracket 121 are bonded to the bottom surface of the accommodating cavity, respectively, thereby increasing the adhesion strength between the bracket 121 and the bottom surface of the accommodating cavity of the battery box.

[0131] As shown in FIGS. 15-17, the bracket 121 can be provided with a receiving portion 1218 on the side facing the battery cell 1111. The receiving portion 1218 is located at the bottom of the battery cell 1111 assembly, and the receiving portion 1218 includes a first receiving groove 1219 arranged to accommodate the battery cell 1111. In this way, the receiving portion 1218 can support and position the battery cell 1111 at the bottom of the battery cell 1111 assembly, thereby improving the connection stability of the battery cell 1111 and the bracket 121.

[0132] In some embodiments, the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be provided with an adhesive member 140. When the battery module 10 is installed in the accommodating cavity of the battery box, the adhesive member 140 provided on the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be bonded to the bottom surface of the accommodating cavity of the battery box, thereby further improving the connection strength between the support assembly 120 and the battery box, and the operation is very convenient.

[0133] In some embodiments, the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be provided with an adhesive member 140. When the battery module 10 is installed in the accommodating cavity of the battery box, the adhesive member 140 provided on the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be bonded to the bottom surface of the accommodating cavity of the battery box, thereby further improving the connection strength between the support assembly 120 and the battery box, and the operation is very convenient.

[0134] Specifically, the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 is a plane. The length of the adhesive member 140 provided on the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 along the fourth direction X is substantially the same as the length of the accommodating portion 1218 along the fourth direction X, thereby extending the length of the adhesive member 140 as much as possible.

[0135] In other embodiments, the number of adhesive members 140 provided on the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be multiple, and the multiple adhesive members 140 are arranged at intervals along the fourth direction X. When the battery module 10 is installed in the accommodating cavity of the battery box, the multiple adhesive members 140 on the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 are bonded to the bottom surface of the accommodating cavity, respectively, thereby improving the bonding strength between the accommodating portion 1218 and the bottom surface of the accommodating cavity of the battery box.

[0136] As shown in FIGS. 16 and 17, the support 121 can further be provided with a connecting hole 1210 at at least one end thereof along the fourth direction X, and an electrically conductive member 150 can be arranged in the connecting hole 1210, and the electrically conductive member 150 is electrically connected to the battery cell 1111. In this way, by electrically connecting the electrically conductive members 150 of the adjacent two battery modules 10, the adjacent two battery modules 10 can be conveniently electrically connected.

[0137] In some embodiments, the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be provided with an adhesive member 140. When the battery module 10 is installed in the accommodating cavity of the battery box, the adhesive member 140 provided on the side surface of the accommodating portion 1218 away from the assembly of the battery cell 1111 can be bonded to the bottom surface of the accommodating cavity of the battery box, thereby further improving the connection strength between the support assembly 120 and the battery box, and the operation is very convenient.

[0138] In addition, the busbar 160 can be connected with the conductive piece 150, so that the conductive piece 150 is electrically connected with the battery cell 1111. Specifically, the conductive piece 150 can be a conductive nut, and the busbar 160 is fixed to the conductive nut by a bolt, so that the busbar 160 is electrically connected with the conductive nut, and the operation is very convenient.

[0139] The battery pack provided by the embodiment of the present application also includes a battery module, and the specific structure of the battery module can refer to the above embodiments. Since the battery pack adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0140] The battery pack includes a battery box and a battery module 10, and the battery box includes a receiving cavity. The structure of the battery module 10 can refer to the above embodiments, and the battery module 10 is installed in the receiving cavity. The battery pack also includes a fastener, which is inserted into the fixing sleeve 130 of the battery module 10, so that the fixing sleeve 130 is sleeved on the fastener, and the fastener is connected with the battery box, so as to connect the battery module 10 with the battery box.

[0141] The battery pack provided by the embodiment of the present application is provided with the first fixing hole 1216 at both ends of the at least one support 121 of the battery module 10 along the fourth direction X, and the fixing sleeve 130 is embedded in the first fixing hole 1216. When the battery module 10 is connected with the battery box, the fastener can be inserted into the fixing sleeve 130, so that the fixing sleeve 130 is sleeved on the fastener and fixedly connected with the fastener, and the fastener is connected with the battery box, so that the support 121 and the battery box can be quickly fixed, and the operation is very convenient.

[0142] At the same time, it can also avoid the fastener being directly connected with the support 121, so that the fastening force of the fastener on the support 121 is too large, which causes the deformation of the support 121, and even causes the fastening failure of the fastener on the support 121, which is beneficial to improve the installation stability of the battery module 10.

Claims

1. A protective plate, comprising a first protective layer, a reinforcing layer, a buffer layer and a second protective layer stacked along a first direction, the reinforcing layer and the buffer layer being stacked between the first protective layer and the second protective layer; wherein the buffer layer comprises a plurality of first buffer grooves and a plurality of second buffer grooves, the plurality of first buffer grooves and the plurality of second buffer grooves being distributed on opposite sides of the buffer layer, and the plurality of first buffer grooves and the plurality of second buffer grooves being distributed in a staggered manner.

2. The guard of claim 1, wherein, the plurality of first buffer grooves and the plurality of second buffer grooves are alternately distributed along a second direction, the second direction being at an angle to the first direction.

3. The guard of claim 2, wherein, the first buffer grooves and the second buffer grooves respectively extend along a third direction, the first direction, the second direction and the third direction being at angles to each other.

4. The shroud of claim 3, wherein, in the second direction, a width of the first buffer grooves is greater than a width of the second buffer grooves.

5. The shroud of claim 1, wherein, the buffer layer is located between the reinforcing layer and the second protective layer, and the second buffer grooves are located on a side of the buffer layer facing the second protective layer; wherein a side of the second protective layer facing the buffer layer is further provided with a buffer protrusion, the buffer protrusion being filled in at least part of the second buffer grooves.

6. The shroud of claim 1, wherein, the buffer layer comprises a connecting portion at the bottom of the second buffer grooves; the protective plate further comprises a second fixing hole, the second fixing hole penetrating through the first protective layer, the reinforcing layer, the connecting portion of the buffer layer and the second protective layer along the first direction.

7. The shroud of claim 6, wherein, a side of the second protective layer away from the buffer layer is provided with a second accommodating groove, and the second fixing hole is provided with an opening at the bottom of the second accommodating groove.

8. The shroud of any one of claims 1 to 7, wherein, a thickness of the buffer layer is greater than or equal to 2 mm and less than or equal to 5 mm; and / or, a wall thickness of the first buffer grooves is greater than or equal to 0.6 mm and less than or equal to 1 mm; and / or, a wall thickness of the second buffer grooves is greater than or equal to 0.6 mm and less than or equal to 1 mm.

9. The shroud of any one of claims 1 to 7, wherein, a thickness of the first protective layer is greater than or equal to 0.6 mm and less than or equal to 1 mm; and / or, a thickness of the second protective layer is greater than or equal to 0.6 mm and less than or equal to 1 mm; and / or, a thickness of the reinforcing layer is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

10. The shroud of any one of claims 1 to 7, wherein, a side of the first protective layer away from the reinforcing layer is provided with a plurality of buffer members.

11. The shroud of claim 10, wherein, the buffer layer comprises a connecting portion at the bottom of the second buffer grooves; the buffer members correspond to the connecting portions in position.

12. The shroud of claim 11, wherein, the plurality of buffer members are divided into a plurality of buffer groups, each buffer group corresponding to a different connecting portion, and the buffer members of the buffer groups being arranged in a spaced manner along the extension direction of the connecting portions.

13. The shroud of any one of claims 1 to 12, wherein, a material of the first protective layer comprises resin and / or glass fiber; and / or, a material of the reinforcing layer comprises metal; and / or, a material of the buffer layer comprises metal; and / or, a material of the second protective layer comprises resin and / or glass fiber. 14.A battery box, comprising: a box body, the box body comprising a receiving cavity configured to accommodate a battery module; A protective plate connected with the box body, the protective plate being the protective plate according to any one of claims 1 to 13, a first protective layer of the protective plate facing the box body.

15. The battery pack of claim 14, wherein, The box body has a mounting opening on one side in communication with the accommodating cavity; the battery box further comprises a box cover assembly, the box cover assembly comprising a cover plate and a separation layer, the cover plate being connected with the box body and covering the mounting opening, the separation layer being arranged on a plate surface of the cover plate facing the accommodating cavity, and the separation layer being arranged to separate at least part of the plate surface from the foaming glue in the accommodating cavity.

16. The battery pack of claim 15, wherein, The plate surface comprises a separation area and a sealing area, the separation layer being arranged on the separation area, and the sealing area being located at the periphery of the separation area, and a sealing member being arranged between the sealing area and the box body.

17. The battery pack of claim 16, wherein, The sealing area extends along the periphery of the separation area in a ring structure.

18. The battery pack of claim 16, wherein, The sealing area is adjacent to the separation area; a projection of the plate surface overlaps the separation area, and a projection of the sealing member overlaps the sealing area.

19. The battery pack of claim 15, wherein, The separation layer is bonded to the plate surface.

20. The battery pack of claim 19, wherein, The bonding strength between the separation layer and the plate surface is less than the bonding strength between the separation layer and the foaming glue; or The bonding strength between the separation layer and the plate surface is greater than the bonding strength between the separation layer and the foaming glue.

21. The battery pack of any one of claims 15 to 20, wherein, The separation layer is a tearable film.

22. The battery pack of any one of claims 15 to 20, wherein, The material of the separation layer comprises one or more of polyethylene terephthalate, polyvinyl chloride and thermoplastic polyurethane.

23. The battery pack of any one of claims 15 to 20, wherein, The thickness of the separation layer is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

24. A battery module arranged in the accommodating cavity of the battery box according to any one of claims 14 to 23, the battery module comprising: a battery assembly comprising at least one battery pack, the battery pack comprising a plurality of battery cells arranged in a fourth direction, each of the battery cells extending in a fifth direction, the fourth direction and the fifth direction forming an angle; a support assembly comprising two supports arranged oppositely, two ends of each of the battery cells being supported by the two supports respectively; wherein at least one of the supports is provided with a first fixing hole at both ends in the fourth direction, and a fixing sleeve is arranged in the first fixing hole, the fixing sleeve being arranged to be sleeved on a fastener and fixedly connected with the fastener.

25. The battery module of claim 24, wherein, The support is provided with a fixing portion at both ends in the fourth direction, and the first fixing hole penetrates through the fixing portion.

26. The battery module of claim 25, wherein, The first fixing hole penetrates through the fixing portion in a height direction of the battery module, and the fourth direction and the fifth direction form an angle with the height direction respectively.

27. The battery module of claim 24, wherein, Both ends of the two supports in the fourth direction are provided with the first fixing hole.

28. The battery module of any one of claims 24 to 27, wherein, The bottom surface of at least one of the supports is provided with a sticking member.

29. The battery module of claim 28, wherein, The bottom surface of the support is provided with a glue groove, and the sticking member is at least partially accommodated in the glue groove.

30. The battery module of claim 28, wherein, The sticking member extends in the fourth direction.

31. The battery module of claim 28, wherein, The support is provided with a receiving portion on a side facing the battery cells, the receiving portion being located at the bottom of the battery cell assembly, the receiving portion comprising a first receiving groove arranged to accommodate part of the battery cells, and the receiving portion being provided with the sticking member on a side surface facing away from the battery cell assembly.

32. The battery module of any one of claims 24 to 27, wherein, At least one end of the support along the fourth direction is further provided with a connecting hole, and a conductive part is arranged in the connecting hole and electrically connected with the battery cell. 33.A battery pack, comprising: a battery box comprising a receiving cavity; a battery module as claimed in any one of claims 24 to 32, the battery module being installed in the receiving cavity.

34. The battery pack of claim 33, wherein, The battery pack further comprises: foaming glue filled between the battery module and a cover assembly and a box body of the battery box.

Images