CN212392333U

CN212392333U - Shell assembly and battery module

Info

Publication number: CN212392333U
Application number: CN202021274015.4U
Authority: CN
Inventors: 张永明; 李志鑫; 丁勋峰; 陆文浩; 谭晶
Original assignee: BYD Co Ltd
Current assignee: Chongqing Fudi Battery Research Institute Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-01-22
Anticipated expiration: 2030-07-02

Abstract

The application discloses casing subassembly reaches battery module including this casing subassembly. The shell assembly comprises a support and an apron detachably connected with the support, the support is provided with a plurality of spacing structures arranged at intervals, the apron covers the support, and the plurality of spacing structures are in one-to-one connection with the plurality of spacing structures. The utility model provides a shell assembly is favorable to shell assembly's maintenance and recycle through the mode assembly of limit structure on the support and the location structure lock on the apron.

Description

Shell assembly and battery module

Technical Field

The application relates to the technical field of power batteries, in particular to a shell assembly and a battery module.

Background

The casing of the battery module is one of the core components of the battery module, and the inner space of the casing is used for accommodating a plurality of battery cells. The housing assembly of the module generally includes a cell support and a cover plate mounted on the cell support. In the conventional technology, the cover plate and the cell support are assembled by fasteners, for example, staples are assembled, so that the staples are broken in the cell support and are difficult to remove when the shell assembly is disassembled, the reuse performance of the shell assembly is poor, and the waste of resources is caused.

SUMMERY OF THE UTILITY MODEL

Based on the relatively poor problem of reuse nature of above-mentioned housing assembly, the housing assembly that this application provided is favorable to housing assembly's maintenance and recycle through the mode assembly of limit structure on the support and the location structure lock on the apron.

In a first aspect, the present application provides a housing assembly. The shell assembly is applied to the battery module. The shell assembly comprises a support and an apron detachably connected with the support, the support is provided with a plurality of spacing structures, the apron is provided with a plurality of spacing positioning structures, and the positioning structures are in one-to-one correspondence with the spacing structures and are connected with the spacing structures in a buckling mode.

In one embodiment, a sliding rail is arranged on one side of the bracket facing the cover plate, a sliding groove is arranged on one side of the cover plate facing the bracket, and the sliding groove is connected in a sliding manner along the sliding rail; wherein, the slide rail includes a plurality of limit structure.

In one embodiment, the cover plate includes a cover plate body and a protruding strip, the protruding strip protrudes from the edge of the cover plate body toward one side close to the bracket, the protruding strip and the cover plate body form the sliding groove, the protruding strip is located on one side of the sliding rail away from the cover plate body, and the protruding strip includes a plurality of positioning structures.

In one embodiment, the limiting structure comprises a first limiting structure, the first limiting structure is located at an end of the slide rail, and the positioning structure comprises a first positioning structure buckled with the first limiting structure and protrudes towards one side close to the slide rail.

In an embodiment, the limit structure comprises a second limit structure, the second limit structure is protruded from one side, close to the cover plate body, of the slide rail toward one side, close to the raised line, of the slide rail, the raised line is provided with a second positioning structure toward one side of the slide rail, and the second positioning structure is connected with the second limit structure in a buckling mode.

In one embodiment, the slide rail includes a first slide rail and a second slide rail that are disposed at an interval, the first slide rail and the second slide rail are respectively located at the periphery of two opposite sides of the support, and the first slide rail and the second slide rail extend along the length direction of the support.

In an embodiment, a limiting rail is further arranged on one side, facing the cover plate, of the bracket, and the limiting rail is located between the first slide rail and the second slide rail and is connected with the cover plate in a sliding manner.

In an embodiment, the cover plate is provided with a positioning rail protruding towards the bracket, the extending direction of the positioning rail is the same as the extending direction of the slide rail, and the positioning rail is located between the first slide rail and the second slide rail and is connected with the limiting rail in a sliding manner.

In one embodiment, the limiting rail is provided with a plurality of protruding blocks arranged at intervals, and the plurality of protruding blocks are clamped with the cover plate.

In a second aspect, the present application further provides a battery module. The battery module comprises a battery core group and the shell assembly, the battery core group comprises a plurality of battery cells which are stacked, and the shell assembly is fixed on the periphery of the battery cells.

In this application embodiment, the mode assembly that the equipment of apron and support is connected through a plurality of limit structure and a plurality of location structure buckle has avoided apron and support to pass through fasteners such as bail when assembling, leads to the damage of casing subassembly because of the damage of fastener dismantling apron and support in-process, is favorable to casing subassembly's maintenance and recycle to and make things convenient for casing subassembly's dismouting. Meanwhile, the detachable mode of the shell assembly also provides convenience for the after-sale of the battery module, so that the market competitiveness of the battery module is improved. And, the apron has reduced materials such as fastener through the mode of direct lock with the support to the cost of battery module has been reduced.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a partially exploded configuration of the housing assembly of FIG. 1;

FIG. 3 is a schematic partial cross-sectional view of the housing assembly shown in FIG. 1;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

FIG. 5 is a schematic illustration of the assembly of the partial housing assembly of FIG. 2;

FIG. 6 is a schematic view of a portion of the position-limiting structure shown in FIG. 2 being engaged with the positioning structure;

fig. 7 is an enlarged schematic view of a portion B shown in fig. 3.

Detailed Description

Technical solutions in embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. In the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery module 100 according to an embodiment of the present disclosure. The battery module 100 can provide a power source for the electric vehicle to drive the electric vehicle to run. The battery module 100 can also be other electronic devices, such as: power generation equipment, unmanned underwater vehicle or recreational vehicle power supply and the like. In the embodiment of the present application, the battery module 100 is described as an example of an electric vehicle.

The battery module 100 includes a battery cell pack 10 and a housing assembly 20. Illustratively, the battery cell pack 10 includes a plurality of battery cells arranged in a stacked manner. The housing assembly 20 is fixed to the periphery of the plurality of battery cells. The shell assembly 20 is located at the outer side of the electric core assembly 10 for protecting the electric core assembly 10.

With continued reference to fig. 1 and 2, fig. 2 is a schematic diagram of a partially exploded structure of housing assembly 20 shown in fig. 1. The housing assembly 20 includes a bracket 21 and a cover plate 22 detachably connected to the bracket 21. Illustratively, the bracket 21 is positioned at one side close to the pole of the electric core group 10. The bracket 21 is provided with a plurality of connecting pieces for connecting the battery cells. The cover plate 22 covers the support 21 to protect the connection pieces and the plurality of battery cells.

In some embodiments, the housing assembly 20 further includes an end plate 23 and a side plate 24 located on the peripheral side of the electric core pack 10. Illustratively, the number of the end plates 23 and the side plates 24 is two. The two end plates 23 are respectively located at two opposite sides of the electric core group 10, the two side plates 24 are respectively located at two opposite sides of the electric core group 10, and the two side plates 24 are connected between the two end plates 23 to surround the electric core group 10. The end plates 23 and the side plates 24 are arranged around the electric core groups 10, so that not only are the plurality of electric core groups 10 inside protected, but also the structural strength of the battery module 100 can be ensured.

Referring to fig. 2 to 4, fig. 3 is a partial cross-sectional view of the housing assembly 20 shown in fig. 1, and fig. 4 is an enlarged structural view of a portion a shown in fig. 3. The bracket 21 is provided with a plurality of spacing structures 210 arranged at intervals. The cover plate 22 is provided with a plurality of spaced apart locating structures 220. The positioning structures 220 are in one-to-one snap connection with the limiting structures 210. A plurality of limit structure 210 and the mutual block of a plurality of location structure 220 realize the diversified location of apron 22 with support 21, have not only guaranteed the accuracy of apron 22 assembly on support 21, have also avoided installing the relative support 21 of apron 22 on support 21 not hard up to the steadiness of the relative support 21 of apron 22 has been guaranteed.

In the embodiment of the present application, the cover plate 22 and the bracket 21 are assembled by the way of connecting the plurality of limiting structures 210 and the plurality of positioning structures 220 by means of fasteners, so that the damage cost of the housing assembly 20 caused by the damage of the fasteners in the process of detaching the cover plate 22 and the bracket 21 when the cover plate 22 and the bracket 21 are assembled by fasteners such as fasteners, which is beneficial to the maintenance and recycling of the housing assembly 20 and is convenient for the detachment and installation of the housing assembly 20. At the same time, the detachable manner of the housing assembly 20 also provides convenience for after-sale of the battery module 100, thereby improving market competitiveness of the battery module 100. In addition, the cover plate 22 and the bracket 21 are directly fastened, so that the number of materials such as fasteners is reduced, and the cost of the battery module 100 is reduced.

With continued reference to fig. 2, 3 and 5, fig. 5 is a schematic structural view of a portion of the housing assembly 20 shown in fig. 2 during an assembly process. In one embodiment, the side of the bracket 21 facing the cover plate 22 is provided with a sliding rail 201, the side of the cover plate 22 facing the bracket 21 is provided with a sliding groove 202, and the sliding groove 202 is slidably connected along the sliding rail 201. Illustratively, the sliding rail 201 extends along the length of the bracket 21. The sliding rail 201 includes a plurality of position limiting structures 210. In the process of assembling the cover 22 to the bracket 21, the positioning structure 220 slides along the slide rail 201 to be fastened with the limiting structure 210, thereby completing the process of assembling the cover 22 to the bracket 21.

In the embodiment of the present application, in the process of assembling the cover plate 22 on the bracket 21, the cover plate 22 is attached to the bracket 21 so that the sliding groove 202 faces the sliding rail 201, the positioning structure 220 on the sliding groove 202 is staggered from the position-limiting structure 210 on the sliding rail 201, and the cover plate 22 is slid along the length direction of the cover plate 22 until the positioning structure 220 abuts against the position-limiting structure 210. When the cover 22 is detached from the bracket 21, the cover 22 can be detached only by sliding out along the length direction of the cover 22 to make the position-limiting structures 210 and the positioning structures 220 staggered. It can be understood that, the sliding fit between the sliding rail 201 on the bracket 21 and the sliding groove 202 on the cover plate 22 is used to assemble the cover plate 22 on the bracket 21, so as to achieve simple and convenient assembly.

In the embodiment of the present application, the cover 22 and the bracket 21 are assembled or disassembled in a sliding manner, the sliding groove 202 of the cover 22 slides along the sliding rail 201 of the bracket 21, so as to ensure the flatness of the cover 22 relative to the mounting surface of the bracket 21, and the sliding groove 202 of the bracket 21 along the length direction of the bracket 21 further ensures the flatness of the cover 22 relative to the mounting surface of the bracket 21 when the cover 22 is mounted on the bracket 21.

Referring to fig. 2 and 3, in one embodiment, the cover 22 includes a cover body 221 and a rib 222. The protruding strip 222 protrudes from the edge of the cover body 221 toward the side close to the bracket 21. The protrusion 222 and the cover body 221 form the sliding slot 202. The protruding strip 222 is located on one side of the slide rail 201 away from the cover body 221, and the protruding strip 222 includes a plurality of positioning structures 220. It can be understood that the protruding bar 222 on the cover 22 is slidably connected to the sliding rail 201 on the bracket 21, and the positioning structure 220 on the protruding bar 222 is snap-connected to the limiting structure 210 on the sliding rail 201 to position the cover 22 relative to the bracket 21.

As shown in fig. 3, the protruding strip 222 is located on a side of the sliding rail 201 away from the cover body 221, that is, the protruding strip 222 is located on an outer side of the sliding rail 201, and the protruding strip 222 contacts the outer side of the sliding rail 201 in the sliding installation process of the cover 22 relative to the bracket 21, so as to prevent the protruding strip 222 from contacting a structure inside the sliding rail 201, such as a connecting piece, which affects an internal structure of the bracket 21. The positioning structure 220 is located on one side of the protruding strip 222 facing the sliding rail 201, so as to be effectively engaged with the limiting structure 210.

In one embodiment, the slide rail 201 includes a first slide rail 2011 and a second slide rail 2012 arranged at intervals. The first slide rail 2011 and the second slide rail 2012 are respectively located at the periphery of the opposite sides of the bracket 21, and the first slide rail 2011 and the second slide rail 2012 extend along the length direction of the bracket 21. The protruding strip 222 is also provided with a first protruding strip and a second protruding strip adapted to the first slide rail 2011 and the second slide rail 2012.

In this embodiment, the first slide rail 2011 and the second slide rail 2012 are respectively located at two sides of the bracket 21, and the slide rails 201 and the protruding strips 222 at two sides slide relatively, so that on one hand, the position of the cover plate 22 relative to the bracket 21 along the Y direction is limited, and on the other hand, the stability of the cover plate 22 sliding relative to the bracket 21 is ensured, thereby being beneficial to improving the flatness of the cover plate 22 relative to the mounting surface of the bracket 21.

Referring to fig. 2 and fig. 6, fig. 6 is a schematic structural view illustrating a portion of the position-limiting structure 210 and the positioning structure 220 shown in fig. 2 being buckled together. In one embodiment, the limiting structure 210 comprises a first limiting structure 2101. The first limiting structure 2101 is located at the end of the sliding rail 201. Exemplarily, both ends that slide rail 201 set up back to back all are equipped with first limit structure 2101. That is, the number of the first limiting structures 2101 is not limited in the present application.

The positioning structure 220 includes a first positioning structure 2201 fastened to the first limiting structure 2101, and is protruded toward one side close to the sliding rail 201. For example, as shown in fig. 6, the first limiting structure 2101 is a slot formed by the sliding rail 201, and the second positioning structure 220 is a protrusion of the protruding strip 222 facing the sliding rail 201.

As shown in fig. 2, the longitudinal direction of the cover 22 or the holder 21 is defined as the X direction, the width direction of the cover 22 or the holder 21 is defined as the Y direction, and the thickness direction of the cover 22 or the holder 21 is defined as the Z direction. The snap connection of the first limiting structure 2101 and the first positioning structure 2201 not only defines the position of the cover 22 relative to the bracket 21 along the X direction, but also ensures the structural stability of the cover 22 and the bracket 21 along the X direction.

With continued reference to fig. 2 and 4, in one embodiment, the restraining structure 210 includes a second restraining structure 2102. The second limiting structure 2102 protrudes from the sliding rail 201 toward a side close to the protruding strip 222. Illustratively, the second stop feature 2102 is located on a side of the first stop feature 2101 distal to the end of the bracket 21. A second positioning structure 2202 is disposed on one side of the protruding bar 222 facing the sliding rail 201. The second positioning structure 2202 is snap-fit to the second retaining structure 2102. With reference to fig. 2 and 4, the protruding strips 222 and the second positioning structures 2202 form a fastening space in the Z direction, the second limiting structures 2102 protrude toward one side of the cover plate body 221, and the second limiting structures 2102 are fastened to the second positioning structures 2202.

In the embodiment of the present application, the second limiting structure 2102 is connected with the second positioning structure 2202 in a snap-fit manner, so that not only the position of the cover 22 relative to the bracket 21 along the Z direction is defined, but also the structural stability of the cover 22 and the bracket 21 along the Z direction is ensured. The number of the second limit structures 2102 may be multiple. The second retaining structures 2102 are spaced apart to further improve the stability of the engagement of the cover 22 with respect to the frame 21. In other embodiments, the number of the second limiting structures 2102 may be one, and the application does not limit the number of the second limiting structures 2102.

With continued reference to fig. 2, 3 and 7, fig. 7 is an enlarged schematic view of a portion B shown in fig. 3. In one embodiment, the side of the bracket 21 facing the cover plate 22 is further provided with a stop rail 31. The position limiting rail 31 is used for limiting the position of the cover plate 22 relative to the bracket 21 along the Y direction. The limiting rail 31 is located between the first slide rail 2011 and the second slide rail 2012, and the limiting rail 31 is slidably connected to the cover plate 22. Illustratively, the cover 22 is provided with a positioning track 32 projecting towards the bracket 21. The extending direction of the positioning rail 32 is the same as the extending direction of the slide rail 201. The positioning rail 32 is located between the first slide rail 2011 and the second slide rail 2012, and is slidably connected to the limiting rail 31.

As shown in fig. 7, the positioning rail 32 protrudes from the cover body 221 toward one side of the bracket 21. Illustratively, the structure of the positioning track 32 is the same as that of the convex strip 222, and is located inside the convex strip 222. The stopper rail 31 includes a plurality of stopper sub-rails arranged at intervals. The positioning rail 32 slides along the inner side of the stopper rail 31. In the embodiment of the present application, the limiting rail 31 is slidably connected to the positioning rail 32, so that not only the position of the cover plate 22 relative to the bracket 21 along the Y direction is defined, but also the flatness between the middle area of the cover plate 22 and the mounting surface of the bracket 21 is ensured, which is beneficial to improving the flatness of the surface of the housing assembly 20.

In one embodiment, as shown in FIG. 2, the curb rails 31 are provided with a plurality of spaced apart projections 310. The plurality of bumps 310 are engaged with the cover plate 22. Illustratively, the positioning rail 32 is provided with a slot adapted to the protrusion 310, so that the protrusion 310 is engaged with the cover 22. The type of the bumps 310 can refer to the first limiting structure 2101 and the second limiting structure 2102, and the shape and number of the bumps 310 are not limited in the present application.

In the embodiment of the present application, the plurality of protrusions 310 on the limiting rail 31 are engaged with the cover plate 22, so that the cover plate 22 is more firmly fixed to the bracket 21, and the stability of the housing assembly 20 is further improved.

In this application embodiment, the cover plate 22 is provided with a plurality of limiting structures 210, the support 21 is provided with a plurality of positioning structures 220 matched with the limiting structures 210, and the plurality of positioning structures 220 are connected with the limiting structures 210 in a buckling manner, so that the cover plate 22 is limited in a plurality of different directions, for example, in three directions, relative to the support 21, so that the cover plate 22 and the support 21 can be detachably connected, and the maintenance and recycling of the battery module 100 are facilitated.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the methods and their core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a shell subassembly, be applied to battery module, its characterized in that, including the support and with the apron of connection can be dismantled to the support, the support is equipped with the limit structure that a plurality of intervals set up, the apron is equipped with the location structure that a plurality of intervals set up, the apron covers the support, and it is a plurality of location structure one-to-one ground and a plurality of limit structure buckle is connected.

2. The housing assembly of claim 1, wherein the side of the bracket facing the cover plate is provided with a slide rail, and the side of the cover plate facing the bracket is provided with a slide groove, and the slide groove is slidably connected along the slide rail; wherein, the slide rail includes a plurality of limit structure.

3. The housing assembly of claim 2, wherein the cover includes a cover body and a rib protruding from an edge of the cover body toward a side near the bracket, the rib and the cover body form the sliding slot, the rib is located on a side of the sliding rail away from the cover body, and the rib includes a plurality of the positioning structures.

4. The housing assembly of claim 3, wherein the limiting structure comprises a first limiting structure, the first limiting structure is located at an end of the slide rail, and the positioning structure comprises a first positioning structure buckled with the first limiting structure and protrudes towards the side close to the slide rail.

5. The housing assembly of claim 3, wherein the limiting structure comprises a second limiting structure protruding from a side of the slide rail close to the cover body toward a side close to the protruding strip, a second positioning structure is provided on a side of the protruding strip toward the slide rail, and the second positioning structure is connected to the second limiting structure in a snap-fit manner.

6. The housing assembly according to any one of claims 2 to 5, wherein the slide rails include a first slide rail and a second slide rail that are spaced apart from each other, the first slide rail and the second slide rail are respectively located on the peripheries of two opposite sides of the bracket, and the first slide rail and the second slide rail extend along the length direction of the bracket.

7. The housing assembly of claim 6, wherein a side of the bracket facing the cover plate is further provided with a limiting rail, the limiting rail is located between the first sliding rail and the second sliding rail, and the limiting rail is slidably connected with respect to the cover plate.

8. The housing assembly of claim 7, wherein the cover plate is provided with a positioning rail protruding toward the bracket, the positioning rail extends in the same direction as the sliding rails, and the positioning rail is located between the first sliding rail and the second sliding rail and is slidably connected to the limiting rail.

9. The housing assembly of claim 7 wherein said retainer rail is provided with a plurality of spaced projections, said plurality of projections engaging said cover plate.

10. A battery module, comprising a core pack and the casing assembly of any one of claims 1 to 9, wherein the core pack comprises a plurality of battery cells arranged in a stack, and the casing assembly is fixed to the periphery of the plurality of battery cells.