Battery assembly, battery pack and vehicle

Abstract

A battery assembly, a battery pack, and a vehicle, the battery assembly including an inner case and a battery module, a plurality of grooves defined in the inner case, and a space defined in each of the grooves becoming one accommodating cavity, and thus a plurality of the accommodating cavities are defined in the inner case, the plurality of the accommodating cavities constitute an accommodating space, and the battery module is installed in each of the accommodating cavities, thereby installing the battery module in the accommodating space.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on and claims priority from Chinese patent application having application number 202123434534.X and filing date December 30, 2021, and Chinese patent application having application number 202210264796.6 and filing date March 17, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of vehicle power battery manufacturing, and more particularly to battery assemblies, battery packs, and vehicles. [Background technology]

[0003] In the prior art, batteries are usually installed in vehicles to provide electrical energy storage and output, so the stability of the battery is very important for the use of the vehicle. In the related art, positioning members are usually installed in the battery to fix the assembly of cells, but the stability of the battery assembly is not sufficient to meet the current use of high-power batteries. Summary of the Invention [Problem to be solved by the invention]

[0004] One object of the present application is to provide a battery assembly, a battery pack, and a vehicle, which has a stable structure for the battery pack. [Means for solving the problem]

[0005] A battery assembly according to a first aspect of the present application includes an inner case and a battery module, wherein a plurality of grooves are defined within the inner case, and the space defined within each groove forms a single accommodating cavity; thus, a plurality of accommodating cavities are defined within the inner case, and the plurality of accommodating cavities constitute an accommodating space, and a battery module is installed within each accommodating cavity, thereby installing the battery module within the accommodating space.

[0006] In some embodiments, the inner case is provided with a deformation buffer part that contracts and deforms to contract the accommodating space, and when the deformation buffer part contracts and deforms, the accommodating space contracts and the inner case abuts against the battery module.

[0007] In some embodiments, each of the accommodating cavities extends along a first direction of the inner case, and multiple of the accommodating cavities are spaced apart in a second direction of the inner case, and the deformation buffer portion extending along the first direction is installed on at least one of the opposing sides of the inner case in a third direction corresponding to each of the accommodating cavities.

[0008] In some embodiments, the openings of the grooves face the same side of the inner case, and the deformation buffers are respectively provided on one side of the inner case opposite to the openings.

[0009] In some embodiments, the opening directions of two adjacent grooves are opposite to each other, and the deformation buffers are respectively provided on one side of the inner case facing the openings.

[0010] In some embodiments, the deformation buffering portion is a concave body recessed toward the accommodating space, and when the inner case is pressed in the second direction, the concave body contracts in the second direction.

[0011] In some embodiments, the inner case further includes the pressure plates installed on opposite sides of the inner case in the second direction.

[0012] In some embodiments, the battery assembly further includes an upper pull plate and a lower pull plate, the pull plate and the lower pull plate being respectively disposed on opposite sides of the inner case in the third direction.

[0013] In some embodiments, the upper pull plate is connected to the inner case by adhesive, welding or crimping, and the lower pull plate is connected to the inner case by adhesive, welding or crimping.

[0014] In some embodiments, the plurality of grooves include a first groove and a second groove, the inner case is bent to form a plurality of the first grooves and the second grooves that are alternately arranged, the first grooves and the second grooves have openings facing in opposite directions, an inner case positioning portion is further installed on the inner case, the battery module includes an end spacer installed on an end thereof, and the end spacer is provided with a battery positioning portion that is positioned and fitted with the inner case positioning portion.

[0015] In some embodiments, the end spacers include a first end spacer and a second end spacer installed at both ends of the battery module, a first battery positioning portion installed on the first end spacer and a second battery positioning portion installed on the second end spacer, the inner case positioning portion includes a first inner case positioning portion and a second inner case positioning portion, the first inner case positioning portion and the second inner case positioning portion are installed at both ends of the first groove, respectively, the first inner case positioning portion and the second inner case positioning portion are installed at both ends of the second groove, respectively, the first inner case positioning portion is positioned and engaged with the first battery positioning portion, and the second inner case positioning portion is positioned and engaged with the second battery positioning portion.

[0016] In some embodiments, the first battery positioning portion is installed on at least one side of the first end spacer and is configured as a position limiting protrusion, the first inner case positioning portion is configured as a position limiting hole, and the position limiting protrusion is fitted into the position limiting hole.

[0017] In some embodiments, the position limiting protrusion is installed on one side of the first end spacer, and two position limiting holes are installed on the groove wall of the first groove and the groove wall of the second groove, and the position limiting protrusion is positioned and fitted into the position limiting holes.

[0018] In some embodiments, the first end spacer includes a plurality of first inner connecting members and an outer partition frame, the plurality of first inner connecting members are installed within the outer partition frame, and the position limiting protrusion is installed on the outer partition frame.

[0019] In some embodiments, the second battery positioning portion is installed on at least one side of the second end spacer and is configured as an elastic fastener, the second inner case positioning portion is configured as a locking hole, and the elastic fastener is locked into the locking hole.

[0020] In some embodiments, the elastic fasteners are installed on both sides of the second end spacer, and there are at least two of the elastic fasteners installed at intervals on each side of the second end spacer, and the groove walls on both sides of the first groove and the second groove are both provided with locking holes, and the elastic fasteners engage with and connect to the locking holes.

[0021] In some embodiments, the second end spacer includes a plurality of second inner connecting members and an outer protective cover, the plurality of second inner connecting members being installed within the outer protective cover, and the elastic fastener being installed on the outer protective cover.

[0022] In some embodiments, the battery module further includes a plurality of series-connected cell groups, an intermediate spacer, and a protective film, the intermediate spacer being disposed between adjacent cell groups, and the plurality of series-connected cell groups being disposed within the protective film.

[0023] A battery pack according to a second aspect of the present application includes the battery assembly described in the above embodiment.

[0024] In some embodiments, the battery pack further includes an outer tray, and the inner case is disposed within the outer tray.

[0025] In some embodiments, the opening of the first groove faces upward, a first adhesive layer is installed between the bottom plate of the first groove and the bottom of the outer tray, a first buffer pad is installed on the bottom of the battery module in the first groove, and a second adhesive layer is installed on the top of the battery module in the first groove; and / or the opening of the second groove faces downward, a third adhesive layer is installed on the outside of the top plate of the second groove, a second buffer pad is installed between the top of the battery module in the second groove and the top plate of the second groove, and a fourth adhesive layer is installed on the bottom of the battery module in the second groove.

[0026] A vehicle according to a third aspect of the present application includes the battery assembly described in the above embodiments or the battery pack described in the above embodiments. [Effects of the Invention]

[0027] According to one embodiment of the present disclosure, by installing a battery positioning portion and an inner case positioning portion and positioning and fitting them together, the battery pack assembly process can be simplified and assembly efficiency can be improved, and the connection and assembly between the battery pack and the inner case can be made more stable, thereby improving the usability of the battery pack.

[0028] According to one embodiment of the present disclosure, a deformation buffer part that can contract and deform is provided on the inner case, and an accommodation space is provided within the inner case. After the battery module is installed in the accommodation space, applying force to the inner case causes the deformation buffer part of the inner case to contract and deform, thereby shrinking the accommodation space. This ensures that the opposing sides of the inner case can press against the battery module, providing a certain biasing force to the battery module, and effectively improving the cycle life of the battery.

[0029] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application, taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0030] The drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0031] [Figure 1] 1 is a schematic diagram of a battery assembly according to an embodiment of the present invention; [Figure 2] FIG. 2 is an exploded view of a battery assembly according to an embodiment of the present invention. [Figure 3] 1 is a schematic end view of a battery assembly according to an embodiment of the present application; [Figure 4] FIG. 2 is a schematic diagram of an inner case of a battery assembly according to an embodiment of the present application. [Figure 5] FIG. 2 is a cross-sectional view of the inner case of the battery assembly according to the embodiment of the present application. [Figure 6] FIG. 6 is a partial enlarged view of an area A in FIG. 5. [Figure 7] 1 is an exploded view of a battery pack according to an embodiment of the present invention; [Figure 8] 1 is a schematic cross-sectional view of a battery pack according to an embodiment of the present application. [Figure 9] FIG. 2 is a schematic diagram of an inner case according to an embodiment of the present invention. [Figure 10] FIG. 10 is a partially enlarged schematic view of part A in FIG. [Figure 11]FIG. 10 is a schematic diagram of an inner case according to another embodiment of the present invention. [Figure 12] 12 is a partially enlarged schematic view of part B in FIG. 11. FIG. [Figure 13] 1 is a schematic diagram of a battery module according to an embodiment of the present invention; [Figure 14] FIG. 2 is a schematic diagram of a first end spacer according to an embodiment of the present invention. [Figure 15] 1 is a schematic diagram of an outer protective cover according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0032] Various exemplary embodiments of the present application will be described in detail below with reference to the drawings. Please note that unless otherwise specifically stated, the relative arrangement of parts and steps, numerical expressions and values ​​described in these embodiments do not limit the scope of the present application.

[0033] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the present application, its application, or uses.

[0034] Techniques, methods and devices known to those skilled in the art are not discussed in detail, but where appropriate, said techniques, methods and devices should be considered part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be construed as illustrative only and not limiting, and therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] Hereinafter, a battery assembly 100 according to an embodiment of the present invention will be described with reference to the drawings.

[0038] As shown in FIGS. 1 to 6, a battery assembly 100 according to an embodiment of the present invention includes an inner case 20 and a battery module 30. As shown in FIG.

[0039] Specifically, an accommodation space 12 is defined within the inner case 20, and the inner case 20 is provided with a deformation buffer 11 that contracts and deforms to contract the accommodation space 12. The battery module 30 is provided within the accommodation space 12, and when the deformation buffer 11 contracts and deforms, the accommodation space 12 contracts and the inner case 20 abuts against the battery module 30.

[0040] In other words, the battery assembly 100 according to the embodiment of the present application is mainly composed of an inner case 20 and a battery module 30. The battery assembly 100 according to the present application may be a long pouch assembly. As shown in FIGS. 1 to 3 , the inner case 20 has a housing space 12 formed therein for receiving the battery module 30. As shown in FIGS. 2 , 4 , 5 , and 6 , the inner case 20 is provided with a deformation buffer 11, which contracts and deforms after receiving a force, thereby achieving the purpose of contracting the housing space 12. The battery module 30 is mounted in the housing space 12. When the deformation buffer 11 contracts and deforms, the housing space 12 contracts, causing the opposing sides of the inner case 20 to contact and press the battery module 30. This ensures the biasing force of the battery module 30 within the inner case 20 and improves the cycle life of the battery.

[0041] Therefore, in the battery assembly 100 according to the embodiment of the present application, a deformation buffer 11 capable of contracting and deforming is provided on the inner case 20, and an accommodation space 12 is provided within the inner case 20. After the battery module 30 is inserted into the accommodation space 12, applying a force to the inner case 20 causes the deformation buffer 11 of the inner case 20 to contract and deform, thereby shrinking the accommodation space 12. This ensures that the opposing sides of the inner case 20 can press against the battery module 30, providing a certain biasing force to the battery module 30 and effectively improving the cycle life of the battery.

[0042] According to one embodiment of the present application, a plurality of accommodating cavities 121 are defined within the inner case 20, each extending along a first direction of the inner case 20, and the plurality of accommodating cavities 121 are spaced apart in a second direction of the inner case 20 to form an accommodating space 12, one battery module 30 is installed within each accommodating cavity 121, and a deformation buffer portion 11 extending along the first direction is installed on at least one of the opposing sides of the inner case 20 in the third direction corresponding to each accommodating cavity 121.

[0043] 2 and 4, a plurality of accommodating cavities 121 may be formed in the inner case 20, and each accommodating cavity 121 may extend along a first direction of the inner case 20, and the plurality of accommodating cavities 121 may be spaced apart in a second direction of the inner case 20. In the present application, as shown in FIG. 1, the inner case 20 may be installed as a rectangular case, and the first direction of the inner case 20 may be understood as the length direction of the inner case 20 (see the arrow direction in FIG. 1), the second direction of the inner case 20 may be understood as the width direction of the inner case 20 (see the arrow direction in FIG. 1), and the third direction of the inner case 20 may be understood as the height direction of the inner case 20 (see the arrow direction in FIG. 1).

[0044] The multiple accommodating cavities 121 may collectively form the accommodating space 12, and providing multiple accommodating cavities 121 within the inner case 20 can also improve the structural strength of the inner case 20. One battery module 30 may be installed within each accommodating cavity 121. Each battery module 30 is formed by connecting multiple cell groups 310 in series, with each cell group 310 including at least one cell 311. When a cell group 310 includes two or more cells 311, the cells 311 may be connected in parallel. Each battery module 30 may be installed within the inner case 20 from one end of each accommodating cavity 121, with a certain installation gap remaining between each battery module 30 and the accommodating cavity 121 to ensure that the battery module 30 is smoothly inserted into the accommodating cavity 121. A deformation buffer 11 extending in the length direction of the inner case 20 is provided on at least one of the opposing sides in the third direction (height direction) of the inner case 20 corresponding to each receiving cavity 121. The deformation buffer 11 may be provided on one side in the height direction of the inner case 20, or on both sides in the height direction of the inner case 20. When a force is applied to the opposing sides in the width direction of the inner case 20, the deformation buffer 11 of the inner case 20 contracts in the width direction of the inner case 20, allowing the inner case 20 to press against each battery module 30 and ensuring the cycle life of the batteries.

[0045] According to one embodiment of the present application, a plurality of grooves are defined in the inner case 20, and the space defined in each groove forms one receiving cavity 121. The openings of each groove face the same side of the inner case 20, and a deformation buffer part 11 is installed on one side of the inner case 20 opposite each opening.

[0046] In other words, a plurality of grooves are formed in the inner case 20, and the space defined in each groove may be understood as one receiving cavity 121. The openings of each groove face the same side of the inner case 20, and a deformation buffer 11 is respectively provided on one side (the groove bottom) opposite each opening of the inner case 20. By providing a plurality of groove structures with the same opening direction in the inner case 20, the battery assembly 100 can be directly inserted into the inner case 20 through the opening of each groove, and by applying an acting force to both opposite sides in the width direction (second direction) of the inner case 20, the deformation buffer 11 is contracted and deformed, thereby providing a biasing force to the battery module 30.

[0047] According to one embodiment of the present application, a plurality of grooves are defined in the inner case 20, and the space defined in each groove is an accommodating cavity 121. The openings of two adjacent grooves are opposite in direction, and a deformation buffer part 11 is installed on one side of the inner case 20 facing each opening.

[0048] That is, as shown in FIGS. 4 to 6 , multiple grooves may be formed in the inner case 20, and the space defined within each groove may serve as a receiving cavity 121. The openings of two adjacent grooves are opposite to each other, so that the inner case 20 has a wall-like structure, and the battery assembly 100 forms a U-shaped series-connected structure. A deformation buffer 11 is provided on each side of the inner case 20 facing each opening. The battery module 30 consisting of upper-layer series-connected batteries can be installed through the upper opening of the inner case 20, and the battery module 30 consisting of lower-layer series-connected batteries can be installed through the lower opening of the inner case 20. After each battery module 30 is installed in each receiving cavity 121, applying force to opposite sides in the width direction (second direction) of the inner case 20 causes the deformation buffer 11 to contract and deform, providing a biasing force to the battery module 30 and effectively improving the cycle life of the battery assembly 100.

[0049] According to one embodiment of the present application, the deformation buffering portion 11 is a concave body recessed toward the accommodation space 12, and when the inner case 20 is pressed in the second direction, the concave body contracts in the second direction.

[0050] 5 and 6, each deformation buffer 11 may be disposed in a recessed portion recessed toward the corresponding receiving cavity 121. When the inner case 20 is pressed in the width direction, the recessed portion contracts and deforms in the width direction of the inner case 20, causing each receiving cavity 121 to contract. This ensures that the two side walls of each recess firmly hold the battery module 30, improving the cycle life of the battery. In this application, the inner case 20 and the deformation buffer 11 are integrally molded, reducing the difficulty and cost of molding the inner case 20.

[0051] In some specific embodiments of the present application, the inner case 20 further includes pressure plates 13 installed on opposite sides of the inner case 20 in the second direction.

[0052] That is, as shown in FIGS. 1, 2, 4 and 5, the inner case 20 may further include pressure plates 13 which may be installed on both opposing sides of the outermost layer of the inner case 20 in the width direction.

[0053] By installing the pressure plate 13, the structural strength of the inner case 20 can be improved, it is easier to apply force to the inner case 20, and it is possible to ensure that the accommodating cavity 121 in each inner case 20 can contract and deform.

[0054] The battery assembly 100 further includes an upper pull plate 31 and a lower pull plate 32, which are respectively installed on opposite sides of the inner case 20 in the third direction. The upper pull plate 31 is connected to the inner case 20 by adhesive bonding, welding or caulking, and the lower pull plate 32 is connected to the inner case 20 by adhesive bonding, welding or caulking.

[0055] 2 , the battery assembly 100 may further include an upper pull plate 31 and a lower pull plate 32. The upper pull plate 31 is disposed above the inner case 20 and constitutes the top plate of the inner case 20. The lower pull plate 32 is disposed below the inner case 20 and constitutes the bottom plate of the inner case 20. The upper pull plate 31 and the inner case 20 may be connected by adhesive, welding, crimping, or other methods, and the lower pull plate 32 and the inner case 20 may be connected by adhesive, welding, crimping, or other methods. Connection methods such as adhesive, welding, or crimping are easy to handle and fasten, and are advantageous in improving the assembly efficiency of the battery assembly 100.

[0056] In the present application, as shown in Figures 1 and 2, taking the inner case 20 having a great wall structure (the opening directions of two adjacent grooves are opposite), as an example, the battery assembly 100 may be composed of an upper pull plate 31, the inner case 20 (great wall-shaped), a lower pull plate 32, upper-layer series-connected batteries (upper-layer battery modules 30), and lower-layer series-connected batteries (lower-layer battery modules 30). The inner case 20 is composed of pressure plates 13 on both sides and a wall-shaped structure in the middle (the opening directions of two adjacent grooves are opposite). A deformation buffer 11 is installed in the inner case 20. The upper series-connected batteries are inserted into the wall-shaped inner case 20 from the top, and the lower series-connected batteries are inserted into the wall-shaped inner case 20 from the bottom. An adhesive layer may be installed between the wall-shaped inner case 20 and the upper series-connected batteries and between the wall-shaped inner case 20 and the lower series-connected batteries. An adhesive may also be installed between the upper pull-out plate 31 and the upper series-connected batteries and between the lower pull-out plate 32 and the lower series-connected batteries. In assembling the battery assembly 100, the series-connected battery modules 30 are first inserted into the wall-shaped inner case 20. Next, the inner case 20 is pressed on both sides in the width direction to contract the deformation buffer 11 and compress the battery modules 30. Finally, the upper and lower pull plates 31 and 32 are attached, and the upper and lower pull plates 31 and 32 are respectively connected to the wall-shaped inner case 20 by adhesive, welding, caulking or other methods, thereby effectively improving the cycle life of the battery.

[0057] In summary, in the battery assembly 100 according to the embodiment of the present application, the inner case 20 is provided with a deformation buffer 11 that can contract and deform, and an accommodation space 12 is provided within the inner case 20. After the battery module 30 is inserted into the accommodation space 12, applying a force to the inner case 20 causes the deformation buffer 11 of the inner case 20 to contract and deform, thereby shrinking the accommodation space 12. This ensures that the opposing sides of the inner case 20 can press against the battery module 30, providing a certain biasing force to the battery module 30 and effectively improving the cycle life of the battery.

[0058] The battery pack according to the second aspect of the present application includes the battery assembly 100 of the above embodiment. Because the battery assembly 100 according to the embodiment of the present application has the above technical effects, the battery pack according to the embodiment of the present application should also have the corresponding technical effects, that is, by using the battery assembly 100, the battery pack according to the present application can provide a biasing force to the batteries in the battery pack, thereby effectively improving the cycle life of the batteries.

[0059] According to a third aspect of the present application, there is provided a battery pack.

[0060] 7 to 15, a battery pack 1 according to an embodiment of the present invention will be described below. The battery pack 1 includes an outer tray 10, an inner case 20, and a plurality of battery modules 30.

[0061] Specifically, the inner case 20 is installed in the outer tray 10, and is bent and has a plurality of first grooves 210 and second grooves 220 arranged alternately, the first grooves 210 and the second grooves 220 having openings facing in opposite directions, an inner case positioning portion 230 is further installed in the inner case 20, a battery module 30 is installed in the first groove 210 and the second groove 220, the battery module 30 includes an end spacer 330 installed at its end, the end spacer 330 is installed at the end of the battery module 30, and the end spacer 330 has a battery positioning portion 350 that is positioned and fitted with the inner case positioning portion 230.

[0062] In addition, the battery module 30 further includes a plurality of cell groups 310 connected in series, an intermediate spacer 320, and a protective film 340. The intermediate spacer 320 is disposed between adjacent cell groups 310 and is disposed together with the plurality of cell groups 310 within the protective film 340. The cell group 310 includes a plurality of cells 311, which may be connected in parallel.

[0063] As can be understood, in the process of assembling the battery pack 1, the outer tray 10 is adapted to place the inner case 20 and the battery modules 30 thereon, and not only provides a position for assembling the battery modules 30 and the inner case 20 to facilitate the assembly of the battery pack 1, but also provides a protective function for the inner case 20 and the battery modules 30 mounted in the outer tray 10.

[0064] During the construction of the inner case 20, the inner case 20 is bent and installed to form a plurality of first grooves 210 and second grooves 220 arranged alternately. The first grooves 210 and the second grooves 220 are installed adjacent to each other, so that adjacent battery modules 30 are separated by the inner case 20, which prevents a battery module 30 from affecting its adjacent battery module 30 after thermal runaway, and is suitable for improving the safety of the battery pack 1 during use.

[0065] The battery module 30 is preferably configured with a plurality of cell groups 310, each of which is preferably configured with a plurality of cells 311. Intermediate spacers 320 are installed between the plurality of cell groups 310, and the intermediate spacers 320 are connected to the cells 311, allowing the plurality of cell groups 310 to be spaced apart. By installing the intermediate spacers 320 between the plurality of cell groups 310, the intermediate spacers 320 support and protect the tabs of adjacent cells 311, thereby protecting the tabs of the adjacent cells 311. The intermediate spacers 320 are connected to and assembled with the plurality of cells 311, facilitating the connection and assembly of the plurality of cell groups 310 and improving assembly efficiency. End spacers 330 are further installed at the ends of the cells 311, and the end spacers 330 are limited to both ends of the battery module 30, improving the structural stability of the battery module 30. The protective film 340 is disposed on the outside of the battery module 30 to protect the battery module 30 and improve the service life of the battery pack 1 .

[0066] In addition, a battery positioning portion 350 is further provided on the end spacer 330, and the battery positioning portion 350 is positioned and fitted to the inner case positioning portion 230 of the inner case 20. After the assembly of the battery module 30 is completed, the battery positioning portion 350 is fitted to the inner case positioning portion 230, simplifying the process of assembling the battery module 30 to the inner case 20 and suitable for improving the assembly efficiency of the battery pack 1. Furthermore, after the battery module 30 is assembled to the inner case 20, the battery positioning portion 350 is fitted to the inner case positioning portion 230, which more reliably assembles the battery module 30 to the inner case 20, thereby making the structure of the battery pack 1 more stable and improving the usability of the battery pack 1.

[0067] In the battery pack 1 according to the embodiment of the present application, the battery positioning portion 350 and the inner case positioning portion 230 are installed and positioned and fitted together, which not only simplifies the assembly process of the battery pack 1 and improves the assembly efficiency, but also makes the connection and assembly between the battery module 30 and the inner case 20 more stable, thereby improving the usability of the battery pack 1.

[0068] In some embodiments, as shown in FIG. 13 , the end spacer 330 includes a first end spacer 331 and a second end spacer 332 installed at both ends of the battery module 30, a first battery positioning portion 351 installed in the first end spacer 331, and a second battery positioning portion 352 installed in the second end spacer 332, the inner case positioning portion 230 includes a first inner case positioning portion 240 and a second inner case positioning portion 250, the first inner case positioning portion 240 and the second inner case positioning portion 250 installed at both ends of the first groove 210, respectively, the first inner case positioning portion 240 and the second inner case positioning portion 250 installed at both ends of the second groove 220, respectively, the first inner case positioning portion 240 positioned and engaged with the first battery positioning portion 351, and the second inner case positioning portion 250 positioned and engaged with the second battery positioning portion 352.

[0069] In this way, by installing the first end spacer 331 and the second end spacer 332 at both ends of the battery module 30, respectively, the first battery positioning portion 351 installed on the first end spacer 331 is suitable for positioning and engaging with the first inner case positioning portion 240 installed on the inner case 20, and the second battery positioning portion 352 installed on the second end spacer 332 is suitable for positioning and engaging with the second inner case positioning portion 250 installed on the inner case 20, thereby making the connection and assembly of the battery module 30 in the inner case 20 more reliable.

[0070] In some specific embodiments, the first battery positioning portion 351 is installed on at least one side of the first end spacer 331 and is configured as a position limiting protrusion, and the first inner case positioning portion 240 is configured as a position limiting hole, and the position limiting protrusion is fitted into the position limiting hole.

[0071] Some of the position limiting holes are provided on the side plates of the inner case 20, and other parts of the position limiting holes are provided on the bottom plate of the inner case 20. By providing the position limiting holes in this manner, it becomes easier to provide the position limiting holes on the inner case 20 when constructing the position limiting holes on the inner case, which makes it easier and more reliable to die-cut the inner case 20 and improves production efficiency.

[0072] As can be seen, by configuring the first battery positioning portion 351 as a position limiting protrusion, the position limiting protrusion has a more stable structure, so that after the position limiting protrusion is installed in the position limiting hole, there is a stronger position limiting effect between the battery module 30 and the inner case 20, making the assembly of the battery module 30 to the inner case 20 more reliable.

[0073] In some specific embodiments, the position limiting protrusion is disposed on one side of the first end spacer 331, and two corresponding position limiting holes are disposed on the groove wall of the first groove 210 and the groove wall of the second groove 220, respectively, and the position limiting protrusion is positioned and fitted into the position limiting holes. The position limiting protrusion is preferably formed on one side of the first end spacer 331, and when the battery module 30 is assembled to the groove walls of the first groove 210 and the second groove 220, the position limiting protrusion is positioned and fitted into the position limiting holes. As shown in FIG. 10 , the position limiting holes of the first groove 210 and the second groove 220 are disposed adjacent to each other. The position limiting holes of the first groove 210 and the second groove 220 may also be disposed on a common groove wall of the first groove 210 and the second groove 220. The first groove 210 and the second groove 220 are adjacent to each other and therefore share a common groove wall, i.e., one groove wall of the first groove 210 is also a groove wall of the second groove 220. A portion of the position limiting hole is disposed on the common groove wall of the first groove 210 and the second groove 220.

[0074] In this way, by installing the position limiting protrusion on one side of the first end spacer 331, when assembling the battery module 30 with the first groove 210 or the second groove 220, the position limiting protrusion is suitable for fitting into the position limiting hole, thereby serving as a foolproof function in the assembling process of the battery module 30, facilitating the connection and assembly between the battery module 30 and the inner case 20, and improving the assembly efficiency of the battery module 30 and the inner case 20.

[0075] 14 , the first end spacer 331 includes a plurality of first inner connecting members 3311 and an outer partition frame 3312, where the plurality of first inner connecting members 3311 are installed in the outer partition frame 3312 and position limiting protrusions are installed on the outer partition frame 3312. As can be understood, the first inner connecting members 3311 are suitable for being connected to the outer partition frame 3312 in a detachable manner, and connecting and assembling the first end spacer 331 can be facilitated by connecting the first inner connecting members 3311 to the outer partition frame 3312 in a detachable manner. Furthermore, the outer partition frame 3312 provides a position for connecting the first inner connecting member 3311, facilitating connection and assembly of the first inner connecting member 3311 and improving assembly efficiency, and not only does it ensure the structure of the first end spacer 331, but it also protects the first inner connecting member 3311, thereby improving the usability of the first end spacer 331. Furthermore, by providing the position limiting protrusions on the outer partition frame 3312, the positioning and fitting between the position limiting protrusions and the position limiting holes is more reliable, making the assembly of the battery pack 1 more stable.

[0076] In some specific embodiments, the second battery positioning portion 352 is installed on at least one side of the second end spacer 332 and configured as an elastic fastener, and the second inner case positioning portion 250 is configured as a locking hole, and the elastic fastener is locked into the locking hole. When the elastic fastener is used in this manner, the elastic fastener elastically deforms during the installation process, facilitating the connection and assembly of the second battery positioning portion 352 and the second inner case positioning portion 250 and improving assembly efficiency.

[0077] In some embodiments, as shown in FIG. 15, elastic fasteners are installed on both sides of the second end spacer 332, and there are at least two elastic fasteners installed at intervals on each side of the second end spacer 332, and the groove walls of the first groove 210 and the second groove 220 are both provided with locking holes, and the elastic fasteners engage with and connect to the locking holes.

[0078] In addition, elastic fasteners are installed on the second end spacers 332, and when adjacent battery modules 30 are assembled to the inner case 20, the second end spacers 332 of adjacent battery modules 30 are installed alternately and the elastic fasteners of adjacent battery modules 30 are alternately connected to the locking holes of the inner case 20, thereby stably and reliably connecting the adjacent battery modules 30 to the inner case 20 and making the connection between the battery modules 30 and the inner case 20 more reliable.

[0079] 13 , the second end spacer 332 includes a plurality of second inner connecting members 3321 and an outer protective cover 3322, and the plurality of second inner connecting members 3321 are installed in the outer protective cover 3322 and connected to the ends of the plurality of cell groups 310, respectively, and elastic fasteners are installed on the outer protective cover 3322. Note that the second inner connecting members 3321 are connected to the sampling nickel sheet and the cells 311.

[0080] As can be seen, the second inner connecting member 3321 is installed on one side of the outer protective cover 3322 facing the cells 311, thereby protecting the second inner connecting member 3321 and the cells 311 from the side of the outer protective cover 3322 away from the cells 311, which is suitable for improving the safety of use of the battery module 30. In addition, the elastic fasteners installed on the outer protective cover 3322 are connected to the locking holes of the inner case 20 to fix the connection between the battery module 30 and the inner case 20, thereby making the assembly and connection between the battery module 30 and the inner case 20 more reliable.

[0081] In some embodiments, as shown in FIG. 8 , the opening of the first groove 210 faces upward, a first adhesive layer 410 is disposed between the bottom plate of the first groove 210 and the bottom of the outer tray 10, a first buffer pad 360 is disposed on the bottom of the battery module 30 in the first groove 210, and a second adhesive layer 420 is disposed on the top of the battery module 30 in the first groove 210; and / or the opening of the second groove 220 faces downward, a third adhesive layer 430 is disposed on the outer side of the top plate of the second groove 220, a second buffer pad 370 is disposed between the top of the battery module 30 in the second groove 220 and the top plate of the second groove 220, and a fourth adhesive layer 440 is disposed on the bottom of the battery module 30 in the second groove 220.

[0082] The first adhesive layer 410 and the third adhesive layer 430 are structural adhesives, and the second adhesive layer 420 and the fourth adhesive layer 440 are thermally conductive adhesives or a mixture of thermally conductive adhesives and some structural adhesives.

[0083] As can be seen, the first adhesive layer 410 is disposed between the bottom plate of the first groove 210 and the outer tray 10, and when the inner case 20 is connected to the outer tray 10, the inner case 20 is adhesively fixed to the outer tray 10 by the first adhesive layer 410. This not only simplifies the assembly process of the battery pack 1 and improves assembly efficiency, but also stabilizes the connection between the inner case 20 and the outer tray 10, improving the structural stability of the battery pack 1 and making the use of the battery pack 1 safer and more reliable. Similarly, the third adhesive layer 430 disposed on the top plate of the second groove 220 has the same structure as the first adhesive layer 410. Those skilled in the art will be able to derive the function and effect of the third adhesive layer 430 from the first adhesive layer 410, and therefore a description thereof will be omitted here.

[0084] Furthermore, when the battery module 30 is assembled in the first groove 210, the first buffer pad 360 is disposed between the battery module 30 and the bottom of the first groove 210, thereby providing excellent buffering and vibration-proofing when the battery module 30 is assembled into the inner case 20, making the use of the battery pack 1 safer and more reliable. The second buffer pad 370 has the same structure as the first buffer pad 360, and those skilled in the art can derive the performance of the second buffer pad 370 from the performance of the first buffer pad 360, so a description thereof will be omitted here. Furthermore, the second adhesive layer 420 and the fourth adhesive layer 440 disposed on the battery module 30 are suitable for fixing the battery module 30 after assembly of the battery module 30, thereby making the structure of the battery pack 1 more stable and reliable.

[0085] A vehicle according to a fourth aspect of the present application includes the battery assembly 100 according to the above embodiment. Because the battery assembly 100 according to the embodiment of the present application has the above technical effects, the vehicle according to the embodiment of the present application should also have the corresponding technical effects, that is, by using the battery assembly 100, the vehicle according to the present application can provide a biasing force to the battery in the battery assembly 100, thereby effectively improving the cycle life of the battery.

[0086] It is understood that other structures and operating principles of the battery assembly 100, the battery pack and the vehicle can be understood and implemented by those skilled in the art, and detailed description thereof will be omitted herein.

[0087] A vehicle according to a fifth aspect of the present application includes the battery pack 1 described above.

[0088] By installing the above-mentioned battery pack 1 in a vehicle, and installing the battery positioning portion 350 and the inner case positioning portion 230 on the battery module 30 and the inner case 20 in the battery pack 1, respectively, and positioning and fitting them together, not only can the assembly process of the battery pack 1 be simplified and the assembly efficiency improved, but also the connection and assembly between the battery module 30 and the inner case 20 can be made more stable, making the use of the battery pack 1 safer and more reliable, thereby improving the safety of the vehicle in use.

[0089] The remaining configuration and operation of vehicles according to embodiments of the present application are known to those skilled in the art and will not be described in detail herein.

[0090] In the description herein, reference to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" means that the specific feature, structure, material, or characteristic described with reference to the embodiment or example is included in at least one embodiment or example of the present application. In the description herein, the exemplary reference to the term is not necessarily limited to the same embodiment or example.

[0091] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is limited by the claims and their equivalents.

[0092] Although certain specific embodiments of the present application have been described in detail using examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. Those skilled in the art will understand that modifications to the above examples can be made without departing from the scope and spirit of the present application. The scope of the present application is limited by the appended claims. [Explanation of symbols]

[0093] 100 Battery Assembly 20 Inner case 11 Deformation buffer section 12 Containment Space 121 Storage Cavity 13 Pressure plate 30 Battery Module 31 Upper drawer 32 Lower drawer 1 battery pack 10 Outer Tray 210 1st groove 220 2nd groove 230 Inner case positioning part 240 First inner case positioning part 250 Second inner case positioning part 310 Cell Group 311 Cell 320 Intermediate spacer 330 End spacer 331 First end spacer 3311 First inner connecting member 3312 Outer partition frame 332 Second end spacer 3321 Second inner connecting member 3322 Outer protective cover 340 Protective Film 350 Battery positioning part 351 First battery positioning part 352 Second battery positioning part 360 1st buffer pad 370 Second buffer pad 410 First adhesive layer 420 Second adhesive layer 430 Third adhesive layer 440 4th adhesive layer

Claims

1. A battery assembly including an inner case and a battery module, A plurality of grooves are defined in the inner case, and a space defined in each groove forms one accommodating cavity. Thus, a plurality of accommodating cavities are defined in the inner case, and the plurality of accommodating cavities constitute an accommodating space; The battery modules are installed in the respective accommodating cavities, so that the battery modules are installed in the accommodating spaces; the plurality of grooves include first grooves and second grooves, the inner case is bent to form the plurality of first grooves and the plurality of second grooves that are alternately arranged, and the first grooves and the second grooves have openings facing in opposite directions; the battery module includes a first end spacer and a second end spacer installed at both ends thereof, a first battery positioning portion installed on the first end spacer, and a second battery positioning portion installed on the second end spacer; a first inner case positioning portion and a second inner case positioning portion are further provided on the inner case, the first inner case positioning portion and the second inner case positioning portion are respectively provided on both ends of the first groove, and the first inner case positioning portion and the second inner case positioning portion are respectively provided on both ends of the second groove; The battery assembly, wherein the first inner case positioning portion is aligned and mated with the first battery positioning portion, and the second inner case positioning portion is aligned and mated with the second battery positioning portion.

2. The inner case is provided with a deformation buffer portion that contracts and deforms to contract the accommodation space, The battery assembly according to claim 1 , wherein when the deformation buffering portion is contracted and deformed, the accommodation space is contracted and the inner case abuts against the battery module.

3. 3. The battery assembly of claim 2, wherein each of the accommodating cavities extends along a first direction of the inner case, the plurality of accommodating cavities are spaced apart in a second direction of the inner case, and the deformation buffer portion extending along the first direction is installed on at least one of opposing sides of the inner case in a third direction corresponding to each of the accommodating cavities.

4. The battery assembly according to claim 3 , wherein the openings of the grooves face the same side of the inner case, and the deformation buffers are respectively installed on one side of the inner case opposite to the openings.

5. The battery assembly according to claim 3 , wherein the openings of two adjacent grooves are opposite to each other, and the deformation buffers are respectively provided on one side of the inner case facing the openings.

6. 3. The battery assembly according to claim 2, wherein the deformation buffering portion is a concave body recessed toward the accommodating space, and when the inner case is pressed in the second direction, the concave body contracts in the second direction.

7. The battery assembly according to claim 1 , wherein the inner case further includes a pressure plate, and the pressure plate is installed on both opposite sides of the inner case in the second direction.

8. The battery assembly according to claim 1 , further comprising an upper pull plate and a lower pull plate, the upper pull plate and the lower pull plate being respectively disposed on opposite sides of the inner case in the third direction.

9. 9. The battery assembly according to claim 8, wherein the upper pull plate is connected to the inner case by adhesive, welding or caulking, and the lower pull plate is connected to the inner case by adhesive, welding or caulking.

10. 2. The battery assembly according to claim 1, wherein the first battery positioning portion is installed on at least one side of the first end spacer and configured as a position limiting protrusion, and the first inner case positioning portion is configured as a position limiting hole, and the position limiting protrusion is fitted into the position limiting hole.

11. 11. The battery assembly of claim 10, wherein the position limiting protrusion is disposed on one side of the first end spacer, and two position limiting holes are disposed on a groove wall of the first groove and a groove wall of the second groove, and the position limiting protrusion is positioned and fitted into the position limiting holes.

12. 11. The battery assembly according to claim 10, wherein the first end spacer includes a plurality of first inner connection members and an outer partition frame, the plurality of first inner connection members being installed in the outer partition frame, and the position limiting protrusion being installed on the outer partition frame.

13. 2. The battery assembly according to claim 1, wherein the second battery positioning portion is installed on at least one side of the second end spacer, the second battery positioning portion is configured as an elastic fastener, the second inner case positioning portion is configured as a locking hole, and the elastic fastener is locked into the locking hole.

14. 14. The battery assembly of claim 13, wherein the elastic fasteners are installed on both sides of the second end spacer, and there are at least two of the elastic fasteners installed at intervals on each side of the second end spacer, and the groove walls on both sides of the first groove and the second groove are both provided with locking holes, and the elastic fasteners are engaged with and connected to the locking holes.

15. 14. The battery assembly of claim 13, wherein the second end spacer includes a plurality of second inner connection members and an outer protective cover, the plurality of second inner connection members being installed within the outer protective cover, and the elastic fastener being installed on the outer protective cover.

16. 2. The battery assembly of claim 1, further comprising a plurality of series-connected cell groups, an intermediate spacer, and a protective film, wherein the intermediate spacer is disposed between adjacent cell groups, and the plurality of series-connected cell groups are disposed within the protective film.

17. A battery pack comprising the battery assembly according to any one of claims 1 to 16.

18. 18. The battery pack of claim 17, further comprising an outer tray, wherein the inner case is disposed within the outer tray.

19. The opening of the first groove faces upward, a first adhesive layer is installed between the bottom plate of the first groove and the bottom of the outer tray, a first buffer pad is installed on the bottom of the battery module in the first groove, and a second adhesive layer is installed on the top of the battery module in the first groove; and / or 19. The battery pack of claim 18, wherein an opening of the second groove faces downward, a third adhesive layer is installed on an outer side of a top plate of the second groove, a second buffer pad is installed between a top of the battery module in the second groove and the top plate of the second groove, and a fourth adhesive layer is installed on a bottom of the battery module in the second groove.

20. A vehicle comprising a battery assembly according to any one of claims 1 to 16.

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