Battery pack shell and sheet metal battery pack

Abstract

The utility model discloses a battery pack shell, which relates to the technical field of batteries, and is characterized in that a pressing strip assembly comprises a metal plate pressing plate and a sealing strip, and the sealing strip is arranged on one side of the metal plate pressing plate and is in contact with the inner surface of the side wall of a lower box body; the sealing strip is provided with a plurality of via holes for the waterproof nuts to pass through; a plurality of first counter bores and connecting holes are formed in the side wall of the lower box body, countersunk screws penetrate through the first counter bores and are connected with waterproof nuts to fix the metal plate pressing plate, and the waterproof effect is achieved through the waterproof nuts; a plurality of second counter bores are formed in the side wall of the upper cover, and the connecting holes directly face the second counter bores and are connected with the waterproof nuts to fix the upper cover; the batten assembly is arranged independent of the lower box body, the appearance size of the cross section of the battery module is not limited by the batten assembly, the space utilization rate of the sheet metal battery pack is improved, the battery module is firstly put into the lower box body, then the batten assembly is fixed on the lower box body, and then the upper cover is fixedly arranged on the lower box body.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically to a battery pack shell and a sheet metal battery pack. Background Technology

[0002] The power battery market is pursuing miniaturization of battery pack size and high waterproof and dustproof performance. The battery pack shell in the market is generally made of sheet metal structure, and waterproofing is achieved after the upper and lower boxes are assembled by using waterproof nut structure or bending structure of lower box.

[0003] like Figure 1 As shown, this is the structure of an existing sheet metal battery pack. Waterproof nuts 02 are pre-set on the lower housing 01, and the upper cover is connected through the waterproof nuts 02. The width A of the battery module 03 needs to be smaller than the distance B between the two waterproof nuts 02 in order to put the battery module 03 into the lower housing 01. The space between the distance B between the two waterproof nuts 02 and the width C of the lower housing 01 is wasted.

[0004] Existing structures sacrifice internal width or length space in the lower housing, reducing the space used by the battery module. For those skilled in the art, how to further improve the space utilization rate of sheet metal battery packs is a technical problem that needs to be solved. Utility Model Content

[0005] The core of this utility model is to provide a battery pack shell in which the pressure strip assembly is set independently of the lower housing. Therefore, the cross-sectional dimensions of the battery module are not limited by the pressure strip assembly, which can further increase the size of the battery module and further improve the space utilization of the sheet metal battery pack. The specific solution is as follows:

[0006] A battery pack casing includes a lower housing, an upper cover, and a pressure strip assembly. The pressure strip assembly includes a sheet metal pressure plate and a sealing strip. The sheet metal pressure plate is provided with a plurality of waterproof nuts. The sealing strip is disposed on one side of the sheet metal pressure plate for contacting the inner surface of the side wall of the lower housing. The sealing strip is provided with a plurality of through holes corresponding to the waterproof nuts.

[0007] The side wall of the lower housing is provided with a number of first countersunk holes and connecting holes. The first countersunk holes are used for countersunk screws to pass through and connect with the waterproof nut to fix the sheet metal pressure plate. The side wall of the upper cover is provided with a number of second countersunk holes.

[0008] The connecting hole and the second countersunk hole are aligned and are used for the fixing screw to pass through and connect with the waterproof nut to fix the top cover.

[0009] Optionally, each of the through holes of the sealing strip is provided with a plurality of sealing rings concentrically, the sealing rings protruding from the surface of the sealing strip for contacting the inner surface of the side wall of the lower housing.

[0010] Optionally, a limiting buckle is arranged on the upper part of the edge of the sheet metal pressing plate, and a clamping groove is arranged on the side wall of the lower box body, and the limiting buckle is used for clamping into the clamping groove.

[0011] Optionally, the first counterbores and the connecting holes are alternately and spacedly arranged.

[0012] Optionally, the waterproof nut is a press-in nut.

[0013] Optionally, the connecting hole is a waist-shaped hole.

[0014] Optionally, the side wall of the upper cover shields the countersunk screw.

[0015] Optionally, the pressing strip assembly is arranged at two long edges of the lower box body or at four side edges of the lower box body.

[0016] Optionally, a sealing gasket is arranged on the upper surface of the inner cavity of the upper cover, and the sealing gasket is used for sealing and pressing the upper edge of the lower box body.

[0017] The utility model also provides a kind of sheet metal battery pack, including the battery pack shell of any one of the above, the inner cavity of lower box body is used to accommodate battery module, pressing strip assembly is used to install on the lower box body, upper cover is fixedly installed on the lower box body to form airtight space.

[0018] The utility model provides a kind of battery pack shell, pressing strip assembly includes sheet metal pressing plate and sealing strip, sealing strip is arranged on the side of sheet metal pressing plate and with the inner surface of the side wall of lower box body contact;Sealing strip is provided with a plurality of via holes for waterproof nut to pass through;The side wall of lower box body is provided with a plurality of first counterbores and connecting holes, countersunk screw passes through first counterbores and is connected with waterproof nut to fix sheet metal pressing plate, waterproof effect is realized by means of waterproof nut;The side wall of upper cover is provided with a plurality of second counterbores, connecting hole and second counterbores are opposite, and are connected with waterproof nut to fix upper cover;Since pressing strip assembly is independently arranged on lower box body, the cross-sectional appearance size of battery module is not limited by pressing strip assembly, improve the space utilization of sheet metal battery pack, when installing, first battery module is placed into lower box body, then pressing strip assembly is fixed on lower box body, and then upper cover is fixedly installed on lower box body. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating laboriously.

[0020] Figure 1It is a structural schematic diagram of an existing sheet metal battery pack;

[0021] Figure 2 It is an explosion map of the first embodiment of the sheet metal battery pack of the utility model;

[0022] Figure 3 It is Figure 2 It is a partial enlarged view of A1 region in the middle;

[0023] Figure 4 It is Figure 2 It is a partial enlarged view of B1 region in the middle;

[0024] Figure 5 It is Figure 2 It is a partial enlarged view of C1 region in the middle;

[0025] Figure 6 It is an explosion map of the first embodiment of the pressing strip assembly;

[0026] Figure 7 It is an explosion map of the second embodiment of the sheet metal battery pack of the utility model;

[0027] Figure 8 It is Figure 7 It is a partial enlarged view of A2 region in the middle;

[0028] Figure 9 It is Figure 7 It is a partial enlarged view of B2 region in the middle;

[0029] Figure 10 It is a first perspective explosion map of the second embodiment of the pressing strip assembly;

[0030] Figure 11 It is a second perspective explosion map of the second embodiment of the pressing strip assembly;

[0031] Figure 12 It is a front view of the sheet metal battery pack of the utility model;

[0032] Figure 13 It is Figure 12 It is a sectional view of I-I;

[0033] Figure 14 It is Figure 13 It is a partial enlarged view of D part first embodiment in the middle;

[0034] Figure 15 It is Figure 13 It is a partial enlarged view of D part second embodiment in the middle;

[0035] Figure 16 It is Figure 12 It is a sectional view of II-II;

[0036] Figure 17 It isFigure 16 Partial enlarged view of the middle E part.

[0037] The figure includes:

[0038] Lower box body 1, first counterbore 11, connecting hole 12, clamping groove 13, upper cover 2, second counterbore 21, sealing gasket 22, pressing strip assembly 3, sheet metal pressing plate 31, waterproof nut 311, limiting buckle 312, sealing strip 32, via hole 321, sealing ring 322, countersunk screw 4, fixing screw 5, battery module 6. DETAILED DESCRIPTION

[0039] In order for those skilled in the art to better understand the technical scheme of the utility model, the battery pack shell of the utility model will be described in detail below in combination with the drawings and specific embodiments.

[0040] The utility model provides a kind of battery pack shell, in combination with Figure 2 As shown in the figure, including lower box body 1, upper cover 2 and pressing strip assembly 3 etc., lower box body 1, upper cover 2 and pressing strip assembly 3 are mutually independent components, mutually fixed assembly, constitute entire battery pack shell.Upper cover 2 is fixed in lower box body 1, and lower box body 1 and upper cover 2 are as external component part of entire battery pack shell, and pressing strip assembly 3 is installed in the cavity formed by lower box body 1 and upper cover 2.Lower box body 1 and the cavity formed by upper cover 2 are used to install battery module 6.

[0041] In combination with Figure 4 、 Figure 6 As shown in the figure, pressing strip assembly 3 includes sheet metal pressing plate 31 and sealing strip 32, and sheet metal pressing plate 31 and sealing strip 32 are two independent components, and sheet metal pressing plate 31 and sealing strip 32 are relatively fixed to constitute entire pressing strip assembly 3.Sheet metal pressing plate 31 is made of rigid material, and provides structural support;Sealing strip 32 is made of elastic material, and can be elastically deformed under extrusion, for example, rubber, silicone etc., and forms sealing at contact position.

[0042] Sheet metal pressing plate 31 is provided with a plurality of waterproof nuts 311, and the waterproof nuts 311 are fixedly installed on the sheet metal pressing plate 31 and are fixed by riveting, welding or the like;The side of the waterproof nut 311 close to the outer side (close to the side wall of lower box body 1) is substantially flush with the sheet metal pressing plate 31 or slightly protrudes from the sheet metal pressing plate 31, and the side of the waterproof nut 311 close to the inner cavity protrudes from the sheet metal pressing plate 31.After installing battery module 6, the position of the waterproof nut 311 is higher than the battery module 6, and the waterproof nut 311 will not interfere with the battery module 6.

[0043] When the battery module 6 is installed in place, the lower edges of both the sheet metal pressure plate 31 and the sealing strip 32 are slightly higher than the upper edge of the battery module 6, or the lower edges of both the sheet metal pressure plate 31 and the sealing strip 32 are slightly lower than the upper edge of the battery module 6. However, it should be ensured that the waterproof nut 311 is higher than the battery module 6, because the length of the waterproof nut 311 is much greater than the combined thickness of the sheet metal pressure plate 31 and the sealing strip 32. Therefore, by setting the waterproof nut 311 at a higher position, the battery module 6 does not need to have any clearance.

[0044] The sheet metal pressure plate 31 is a vertically arranged elongated strip structure. A sealing strip 32 is disposed on one side of the sheet metal pressure plate 31, and the other side of the sheet metal pressure plate 31 contacts the inner surface of the side wall of the lower housing 1. The sealing strip 32 is an elongated strip structure, and its external dimensions are approximately equal to those of the sheet metal pressure plate 31. The sealing strip 32 is used to contact the inner surface of the side wall of the lower housing 1, thereby maintaining a relative seal between the pressure strip assembly 3 and the lower housing 1 during assembly and fixing.

[0045] The sealing strip 32 is provided with several through holes 321 corresponding to the waterproof nut 311. When installing the waterproof nut 311, each waterproof nut 311 can pass through one through hole 321, and the through hole 321 forms a clearance space for the waterproof nut 311.

[0046] Combination Figure 2 , Figure 3 As shown, several first countersunk holes 11 and connecting holes 12 are provided on the side wall of the lower housing 1. The first countersunk holes 11 have recessed portions, which are combined with... Figure 8 , Figure 9 As shown, the first countersunk hole 11 is used for the countersunk screw 4 to pass through and connect with the waterproof nut 311 to fix the sheet metal pressure plate 31; when the countersunk screw 4 is fixedly installed in the first countersunk hole 11, the countersunk screw 4 is flush with or slightly recessed with the side wall of the lower housing 1 to avoid interference with the upper cover 2.

[0047] Combination Figure 7 , Figure 17 As shown, the side wall of the upper cover 2 is provided with several second countersunk holes 21, each second countersunk hole 21 is opposite to a connecting hole 12, and the fixing screw 5 passes through the second countersunk hole 21 and the connecting hole 12 and is threaded to the waterproof nut 311, thereby realizing the fixed installation of the upper cover 2.

[0048] The number of waterproof nuts 311 is equal to the sum of the number of first countersunk holes 11 and the number of second countersunk holes 21. Countersunk screws 4 are connected to several waterproof nuts 311 to fix the pressure strip assembly 3. Fixing screws 5 are connected to several waterproof nuts 311 to fix the top cover 2.

[0049] The utility model disculous battery pack shell is used for installing battery module 6, and the pressing strip subassembly 3 is independent of lower box body 1, when assembling, first, battery module 6 is put into lower box body 1, at this time, there is no blocking of pressing strip subassembly 3, and the length and width size of battery module 6 can be more close to the inner cavity size of lower box body 1, and the length and width size of battery module 6 are not limited by pressing strip subassembly 3, thus the gap size between battery module 6 and lower box body 1 is reduced, and under the premise of the same size of lower box body 1, the volume of battery module 6 can be improved, and the space utilization of lower box body 1 is improved.

[0050] On the basis of the above-mentioned scheme, the utility model discloses a plurality of sealing rings 322 are arranged concentrically in each through hole 321 of the sealing strip 32, and the sealing ring 322 is arranged on the surface of the sealing strip 32. Figure 9 As shown in the structure of the sealing ring 322, the sealing ring 322 protrudes from the surface of the sealing strip 32 in the form of a circular ring, and the sealing ring 322 is used to contact the inner surface of the side wall of the lower box body 1. In order to achieve better sealing capacity, a plurality of sealing strips 32 are concentrically arranged around the through hole 321. The sealing ring 322 protrudes and forms a more compact contact effect when it contacts the lower box body 1. The sealing ring 322 is compressed and deformed, improving the sealing capacity.

[0051] As shown in the structure of the sealing ring 322, the sealing ring 322 protrudes from the surface of the sealing strip 32 in the form of a circular ring, and the sealing ring 322 is used to contact the inner surface of the side wall of the lower box body 1. In order to achieve better sealing capacity, a plurality of sealing strips 32 are concentrically arranged around the through hole 321. The sealing ring 322 protrudes and forms a more compact contact effect when it contacts the lower box body 1. The sealing ring 322 is compressed and deformed, improving the sealing capacity. Figure 17 As shown in the structure of the sealing ring 322, the sealing ring 322 protrudes from the surface of the sealing strip 32 in the form of a circular ring, and the sealing ring 322 is used to contact the inner surface of the side wall of the lower box body 1. In order to achieve better sealing capacity, a plurality of sealing strips 32 are concentrically arranged around the through hole 321. The sealing ring 322 protrudes and forms a more compact contact effect when it contacts the lower box body 1. The sealing ring 322 is compressed and deformed, improving the sealing capacity.

[0052] As shown in the structure of the sealing ring 322, the sealing ring 322 protrudes from the surface of the sealing strip 32 in the form of a circular ring, and the sealing ring 322 is used to contact the inner surface of the side wall of the lower box body 1. In order to achieve better sealing capacity, a plurality of sealing strips 32 are concentrically arranged around the through hole 321. The sealing ring 322 protrudes and forms a more compact contact effect when it contacts the lower box body 1. The sealing ring 322 is compressed and deformed, improving the sealing capacity. Figure 9 As shown in the structure of the sealing ring 322, the sealing ring 322 protrudes from the surface of the sealing strip 32 in the form of a circular ring, and the sealing ring 322 is used to contact the inner surface of the side wall of the lower box body 1. In order to achieve better sealing capacity, a plurality of sealing strips 32 are concentrically arranged around the through hole 321. The sealing ring 322 protrudes and forms a more compact contact effect when it contacts the lower box body 1. The sealing ring 322 is compressed and deformed, improving the sealing capacity.

[0053] As shown in the structure of the sealing ring 322, the sealing ring 322 protrudes from the surface of the sealing strip 32 in the form of a circular ring, and the sealing ring 322 is used to contact the inner surface of the side wall of the lower box body 1. In order to achieve better sealing capacity, a plurality of sealing strips 32 are concentrically arranged around the through hole 321. The sealing ring 322 protrudes and forms a more compact contact effect when it contacts the lower box body 1. The sealing ring 322 is compressed and deformed, improving the sealing capacity. Figure 8As shown, the side wall of the lower box body 1 is provided with a clamping groove 13, which is a recessed notch structure provided on the upper edge of the side wall of the lower box body 1, and has a U-shaped structure. The clamping groove 13 is provided on the side wall opposite to the two ends of the sheet metal pressing plate 31 respectively. The width of the clamping groove 13 should be slightly larger than the thickness of the limiting buckle 312, so that the limiting buckle 312 is clamped into the clamping groove 13, and the clamping groove 13 provides vertical upward supporting force to the limiting buckle 312, and the two side walls of the clamping groove 13 limit the position of the limiting buckle 312, which can limit the position of the sheet metal pressing plate 31 in the direction perpendicular to the surface of the sheet metal pressing plate 31. The depth of the clamping groove 13 should be slightly larger than the size of the limiting buckle 312, so that when the limiting buckle 312 enters the clamping groove 13, the upper edge of the entire pressing strip assembly 3 is substantially flush with the upper edge of the side wall of the lower box body 1, or slightly lower than the upper edge of the side wall of the lower box body 1.

[0054] By setting the clamping groove 13 and the limiting buckle 312, when installing the pressing strip assembly 3, the limiting buckle 312 can be clamped into the clamping groove 13 first, at this time the waterproof nut 311 can be opposite to the first counterbore 11 and the connecting hole 12 respectively, and then fastened and connected through the screw, realizing positioning first and then assembling, and improving the convenience of assembly.

[0055] The first counterbore 11 and the connecting hole 12 provided on the lower box body 1 are alternately and spacedly distributed, in combination with Figure 2 、 Figure 7 As shown, it shows that five holes are provided on one side wall of the lower box body 1, the first, third and fifth holes are connecting holes 12, and the second and fourth holes are first counterbores 11, that is, the types of the two adjacent holes are different. The positions of the first counterbores 11 and the connecting holes 12 are located on the same straight line, and are both provided near the upper edge of the side wall of the lower box body 1.

[0056] The first counterbores 11 are used to fix the pressing strip assembly 3 to the lower box body 1, and the connecting holes 12 are used to fix the upper cover 2 to the lower box body 1. The first counterbores 11 and the connecting holes 12 are alternately and spacedly distributed, which can make the stress more evenly distributed on the basis of ensuring the connection strength, and ensure the sealing performance of each position. Generally, the number of connecting holes 12 should be more than the number of first counterbores 11, and the positions at both ends should be connecting holes 12.

[0057] In combination with Figure 2 、 Figure 7 As shown, the connecting hole 12 is a waist-shaped hole, and the vertical height of the connecting hole 12 is greater than the width in the transverse direction. Since the connecting hole 12 needs to be opposite to the second counterbore 21 on the upper cover 2 and install a screw, the layout of the waist-shaped hole can reduce the machining and assembly error, so that the connecting hole 12 and the second counterbore 21 are more easily opposite.

[0058] Specifically, the waterproof nut 311 used in this utility model is a press-fit nut, also called a rivet nut or self-locking nut. It is a type of nut used on thin plates or sheet metal. It is circular in shape, with embossed teeth and a guide groove at one end. The embossed teeth are pressed into pre-drilled holes in the sheet metal. Generally, the diameter of the pre-drilled hole is slightly smaller than the embossed teeth of the press-fit nut. Pressure forces the embossed teeth into the plate, causing plastic deformation around the pre-drilled hole. The deformed material is squeezed into the guide groove, thus creating a locking effect. The waterproof nut 311 is fixed to the sheet metal pressure plate 31 by riveting, allowing for quick and convenient relative fixation. The end of the waterproof nut 311 remains sealed, preventing external moisture from entering the lower housing 1.

[0059] The sidewalls of the top cover 2 conceal countersunk screws 4. The top cover 2 includes a top surface and four sidewalls, which are combined... Figure 12 , Figure 13 , Figure 14 , Figure 15 As shown, when the upper cover 2 is installed and fixed to the lower housing 1, the side walls around it cover the side walls of the lower housing 1 and the side walls cover the countersunk screws 4, which can prevent the countersunk screws 4 from moving outward and play a role in preventing the countersunk screws 4 from loosening.

[0060] Based on any of the above technical solutions and their combinations, the pressure strip assembly 3 of this utility model can be positioned in different ways. At least two pressure strip assemblies 3 are provided, combined... Figure 2 , Figure 7 As shown, the two pressure strip components 3 in this utility model are set on the two long sides of the lower housing 1. The two pressure strip components 3 are parallel to each other and face each other. The long strips have a larger length for screw installation and fixation.

[0061] In addition, the pressure strip assembly 3 can be set to four, respectively set on the four sides of the lower housing 1, that is, pressure strip assembly 3 is set on the two short sides and the two long sides, thereby further improving the firmness of the connection.

[0062] Combination Figure 15 As shown, to improve the sealing between the upper cover 2 and the lower housing 1, a sealing gasket 22 is provided on the upper surface of the inner cavity of the upper cover 2. The sealing gasket 22 can be provided on the entire top surface of the lower housing 1, or it can be provided only in a ring at the position corresponding to the side wall of the lower housing 1. The sealing gasket 22 is used to seal and press the upper edge of the lower housing 1, thereby improving the airtightness between the upper cover 2 and the lower housing 1.

[0063] The utility model also provides a sheet metal battery pack, including above battery pack shell, still include battery module 6, the inner chamber of lower box body 1 is used for accommodating battery module 6, and the batten subassembly 3 is installed in the side wall inner surface of lower box body 1, and the upper cover 2 fixed cover is arranged in the upper of lower box body 1 and forms the closed space. Can be in upper cover 2 install explosion -proof pressure -relief valve and so on balanced pressure. The sheet metal battery pack can realize the technical effect introduced above.

[0064] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the utility model. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the utility model. Accordingly, the utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack housing, characterized by, The application relates to a battery pack shell, which comprises a lower box body (1), an upper cover (2) and a pressing strip assembly (3), the pressing strip assembly (3) comprises a sheet metal pressing plate (31) and a sealing strip (32), a plurality of waterproof nuts (311) are arranged on the sheet metal pressing plate (31), the sealing strip (32) is arranged on one side of the sheet metal pressing plate (31) and is used for being in contact with the inner surface of the side wall of the lower box body (1); a plurality of through holes (321) are arranged on the sealing strip (32) in correspondence with the waterproof nuts (311). A plurality of first counterbores (11) and connecting holes (12) are arranged on the side wall of the lower box body (1), the first counterbores (11) are used for allowing the sink head screws (4) to pass through and are connected with the waterproof nuts (311) to fix the sheet metal pressing plate (31); a plurality of second counterbores (21) are arranged on the side wall of the upper cover (2). The connecting holes (12) and the second counterbores (21) are opposite to each other and are used for allowing the fixing screws (5) to pass through and be connected with the waterproof nuts (311) to fix the upper cover (2).

2. The battery pack enclosure of claim 1, wherein, A plurality of sealing rings (322) are concentrically arranged in each through hole (321) of the sealing strip (32), the sealing rings (322) protrude from the surface of the sealing strip (32) and are used for being in contact with the inner surface of the side wall of the lower box body (1).

3. The battery pack enclosure of claim 1, wherein, Limiting buckles (312) are arranged on the upper portions of the edges of the two ends of the sheet metal pressing plate (31), and clamping grooves (13) are arranged on the side wall of the lower box body (1), the limiting buckles (312) are used for being clamped into the clamping grooves (13).

4. The battery pack enclosure of claim 1, wherein, The first counterbores (11) and the connecting holes (12) are alternately and spacedly arranged.

5. The battery pack enclosure of claim 1, wherein, The waterproof nuts (311) are press rivet nuts.

6. The battery pack enclosure of claim 1, wherein, The connecting holes (12) are waist-shaped holes.

7. The battery pack enclosure of claim 1, wherein, The side wall of the upper cover (2) blocks the sink head screws (4).

8. The battery pack enclosure of any one of claims 1 to 7, wherein, The pressing strip assembly (3) is arranged at the two long edges of the lower box body (1) or at the four side edges of the lower box body (1).

9. The battery pack enclosure of any one of claims 1 to 7, wherein, A sealing gasket (22) is arranged on the upper surface of the inner cavity of the upper cover (2), and the sealing gasket (22) is used for sealing and pressing the upper edge of the lower box body (1).

10. A sheet metal battery pack characterized by, The application further relates to a battery pack shell, which comprises the battery pack shell according to any one of claims 1 to 9, the inner cavity of the lower box body (1) is used for accommodating a battery module (6), the pressing strip assembly (3) is used for being mounted on the lower box body (1), and the upper cover (2) is fixedly mounted on the lower box body (1) to form a sealed space.

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