CN216958349U - Box and battery package - Google Patents

Abstract

The utility model discloses a box body and a battery pack, and relates to the technical field of batteries; the box body is used for installing the battery module and comprises a plurality of edge beams which are annularly arranged at intervals in sequence, the end parts of any two adjacent edge beams are connected through at least one corner connecting piece, the two sides of each corner connecting piece are detachably matched with the two adjacent edge beams respectively, and the plurality of corner connecting pieces and the plurality of edge beams are enclosed into an annular structure for installing the battery module. The box body is convenient for assembling the edge beams to obtain the box body through the arrangement of the edge beams and the corner connectors, the assembly efficiency can be improved, the corner connectors and the edge beams can be detachably matched, the disassembly and the maintenance can also be convenient, and the disassembly and the maintenance efficiency can be improved; simultaneously, the box stability can be guaranteed to angle connector and boundary beam equipment are the loop configuration to guarantee the stability and the reliability of battery module, with the assembly efficiency and the quality that improve the battery package.

Description

Box and battery package

Technical Field

The utility model relates to the technical field of batteries, in particular to a box body and a battery pack.

Background

In the prior art, the problem of low assembly efficiency and poor stability of a battery pack box body exists, and the assembly efficiency and the quality of a battery pack are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a box body and a battery pack which are high in assembly efficiency and stability, and the assembly efficiency and quality of the battery pack can be guaranteed.

The embodiment of the utility model is realized by the following steps:

in a first aspect, the present invention provides a case for mounting a battery module, including:

be cyclic annular a plurality of boundary beams of interval arrangement in proper order, connect through at least one angle connecting piece between the tip of two arbitrary adjacent boundary beams, and the cooperation can be dismantled with two adjacent boundary beams respectively in the both sides of every angle connecting piece, and a plurality of angle connecting pieces and a plurality of boundary beams enclose into the loop configuration who is used for installing battery module.

In an optional embodiment, two sides of the corner connecting piece are respectively provided with a protrusion, each edge beam is correspondingly provided with a weight reducing groove, and the protrusions on the two sides of the corner connecting piece are respectively inserted into the weight reducing grooves of the two adjacent edge beams;

or,

the both sides of angle connecting piece have all been seted up and have been subtract heavy groove, and the both ends of every boundary beam all correspond and are provided with the arch, and the heavy groove of the both sides of angle connecting piece is pegged graft with the arch of two adjacent boundary beams respectively.

In an optional implementation mode, the end portions of any two adjacent boundary beams are connected through an angle connecting piece, a plurality of protrusions are respectively arranged on two sides of the angle connecting piece, a plurality of weight reducing grooves matched with the protrusions on each of the two sides of the angle connecting piece in number penetrate through the length direction of each boundary beam, and two ends of each weight reducing groove of each boundary beam are respectively inserted into the protrusions of the corresponding angle connecting piece.

In an alternative embodiment, at least one of the plurality of projections on each of the two sides of the corner connector is sized or shaped differently than the other projections.

In an optional embodiment, two sides of the corner connector are respectively provided with three protrusions, the three protrusions on each side are arranged at intervals along the height direction of the corner connector, and the size of the protrusion in the middle of the three protrusions on each side is smaller than or larger than the sizes of the two protrusions on the two sides;

or,

the two sides of the corner connecting piece are respectively provided with three bulges, the three bulges on one side of the two sides are arranged at intervals along the height direction of the corner connecting piece, and the size of the bulge positioned at the lowest part of the three bulges is smaller than or larger than the sizes of the other two bulges; the three bulges on the other side of the two sides are arranged at intervals along the height direction of the corner connecting piece, and the size of the bulge positioned in the middle of the three bulges is smaller than or larger than the sizes of the other two bulges.

In an optional embodiment, the box body comprises four boundary beams, two first beams and two second beams are respectively arranged, the two first beams are arranged in parallel and at intervals, the two second beams are arranged in parallel and at intervals, the two first beams and the two second beams are arranged in an annular interval, the box body comprises four corner connecting pieces, and two sides of each corner connecting piece are respectively connected with the first beams and the second beams.

In an optional embodiment, the first beam comprises a first connecting part and a second connecting part which are connected in an included angle, the first connecting part is used for being detachably matched with the corresponding corner connecting piece, and the second connecting part extends towards the direction close to the battery module; the second roof beam is including being third connecting portion and the fourth connecting portion that the contained angle is connected, and the third connecting portion are used for dismantling the cooperation with the corner connector that corresponds, and the fourth connecting portion are located one side that battery module was kept away from to the third connecting portion.

In an alternative embodiment, at least one of the four side beams is provided with a fixing hole, and the fixing hole is used for fastening the box body on the mounting surface through a fastener.

In an optional embodiment, the first beam is provided with at least one mounting lug, the mounting lug is provided with a fixing hole, the second beam is provided with a fixing hole, and each fixing hole is used for fastening the box body on the mounting surface through a fastener.

In an optional embodiment, a first step groove is formed in the lower portion of each edge beam, a second step groove is formed in the lower portion of each corner connecting piece, and an annular groove is defined by the plurality of first step grooves and the plurality of second step grooves;

the box body also comprises a bottom plate which is inserted into the annular groove.

In an optional embodiment, a water cooling plate is arranged in the box body, the water cooling plate is arranged on the bottom plate, and the annular structure is abutted to the circumferential direction of the water cooling plate.

In an alternative embodiment, at least one of the edge beams and the corner connectors is provided with a third step groove, and the water cooling plate is inserted into the third step groove.

In an optional embodiment, the upper part of each edge beam is provided with a first mounting groove, the upper part of each corner connecting piece is provided with a second mounting groove, and the plurality of first mounting grooves and the plurality of second mounting grooves are communicated to form mounting ring grooves;

the box body further comprises a top cover and a first sealing ring, the top cover is arranged at the end part of the annular structure, and the first sealing ring is accommodated in the mounting ring groove and located between the annular structure and the top cover.

In an alternative embodiment, the top cover is arranged in a ring shape at a position opposite to the ring structure, and a plurality of matching holes are arranged in the ring shape, and each matching hole is fixedly connected with the ring structure through a fastening piece.

In an optional embodiment, the corner connector comprises an arc-shaped section and two straight line sections positioned on two sides of the arc-shaped section, wherein the two straight line sections are respectively used for being detachably matched with two adjacent boundary beams;

or,

the corner connecting piece comprises an arc-shaped section and a straight section which are connected, and the straight section and the arc-shaped section are respectively used for being detachably matched with two adjacent boundary beams;

or,

the corner connecting piece comprises two straight line sections which are arranged at an included angle, and the two straight line sections are respectively used for being detachably matched with two adjacent boundary beams;

or,

the corner connector comprises two arc sections which are connected and arranged, and the two straight sections are respectively used for being detachably matched with the two adjacent boundary beams.

In an alternative embodiment, the box body further comprises at least one cross beam, the cross beam is arranged in the annular structure along the third direction, is matched with the inner peripheral side of the annular structure, and is used for being connected with the battery modules when the battery modules are arranged in the annular structure.

In an alternative embodiment, the box further comprises at least one longitudinal beam, which is arranged in the annular structure in a fourth direction in an extending manner and cooperates with an inner peripheral side of the annular structure.

In an optional implementation mode, the box body further comprises a cross beam and a longitudinal beam which are arranged in an intersecting mode, and the longitudinal beam is provided with an avoiding groove for the cross beam to penetrate through.

In an alternative embodiment, the case further includes a top cover covering the end of the ring structure, and the top cover has a concave groove recessed toward the battery module.

In an optional embodiment, the recessed grooves include a first recessed groove and a second recessed groove, the number of the first recessed grooves is multiple, the multiple first recessed grooves are arranged at intervals along a first direction, each first recessed groove extends along the first direction, the number of the second recessed grooves is multiple, the multiple second recessed grooves are arranged at intervals along the first direction, the multiple second recessed grooves and the multiple first recessed grooves are alternately arranged along the first direction, and each second recessed groove extends along a second direction which forms an included angle with the first direction.

In an alternative embodiment, the case further comprises a high-voltage box disposed outside the ring structure, the high-voltage box having a cavity for accommodating the BDU and/or the BMS.

In an optional embodiment, the high-pressure cartridge further includes a cover body, the cover body is covered outside the cavity, the top of the high-pressure cartridge is provided with an accommodating ring groove, and the box body further includes a second sealing ring, the second sealing ring is accommodated in the accommodating ring groove and located between the cover body and the high-pressure cartridge.

In an optional embodiment, the cover body is annularly provided with a plurality of openings at a position opposite to the end of the high-voltage box, and each opening is used for being connected with the high voltage box and the high voltage box in a fastening mode through one fastening piece.

In an alternative embodiment, the high-voltage box is provided with at least one mounting block in a connecting manner, the mounting block is provided with a fastening hole in a penetrating manner, and the fastening hole is used for fastening the high-voltage box to the mounting surface through a fastening piece.

In an optional embodiment, the mounting block is provided with a weight-reducing cavity.

In an optional embodiment, the bottom of the high-voltage box is provided with a thinning groove;

or,

the bottom of high-pressure box has seted up the attenuate recess, is provided with the strengthening rib in the attenuate recess.

In a second aspect, the present invention provides a battery pack, comprising:

the case of any of the preceding embodiments;

and the battery module is arranged in the annular structure of the box body.

Embodiments of the utility model have at least the following advantages or benefits:

the embodiment of the utility model provides a box body, which is used for installing a battery module, and comprises a plurality of edge beams which are sequentially arranged at intervals in an annular shape, the end parts of any two adjacent edge beams are connected through at least one corner connecting piece, the two sides of each corner connecting piece are respectively detachably matched with the two adjacent edge beams, and the plurality of corner connecting pieces and the plurality of edge beams form an annular structure for installing the battery module. The box body is convenient for assembling the boundary beams to obtain the box body through the arrangement of the boundary beams and the corner connecting pieces, the assembling efficiency can be improved, the corner connecting pieces are detachably matched with the boundary beams, the disassembly and the maintenance can also be convenient, and the disassembly and the maintenance efficiency can be improved; simultaneously, the box stability can be guaranteed to angle connector and boundary beam equipment are the loop configuration to guarantee the stability and the reliability of battery module, with the assembly efficiency and the quality that improve the battery package.

The embodiment of the utility model also provides a battery pack, which comprises the same. Therefore, the battery pack also has the advantages of high assembly efficiency and high quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

fig. 2 is an exploded view of a battery pack according to an embodiment of the present invention;

fig. 3 is a partial structural schematic view of a box body of a battery pack according to an embodiment of the present invention;

fig. 4 is a partial structural schematic diagram ii of a box body of a battery pack according to an embodiment of the present invention;

FIG. 5 is a first schematic structural diagram of a corner connector of a box according to an embodiment of the present invention;

FIG. 6 is a second schematic structural view of a corner connector of a box according to an embodiment of the present invention;

FIG. 7 is a first structural view of a first beam of the box according to the embodiment of the present invention;

FIG. 8 is a second structural view of a first beam of the box according to an embodiment of the present invention;

FIG. 9 is a first schematic structural view of a second beam of the enclosure provided in an embodiment of the present invention;

FIG. 10 is a second structural view of a second beam of the enclosure according to an embodiment of the present invention;

FIG. 11 is a first structural diagram of a high-voltage box of a box according to an embodiment of the present invention;

fig. 12 is a second schematic structural diagram of a high-voltage box of a box body according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a cover of a box according to an embodiment of the present invention.

100-battery pack; 101-a battery module; 103-a box body; 105-a first beam; 107-a second beam; 109-corner connectors; 111-straight line segment; 113-arc segment; 115-protrusions; 117-weight reduction slots; 118-a hollow-out slot; 119-a first connection; 121-a second connection; 123-a third connection; 125-a fourth connecting portion; 127-a fixation hole; 129-mounting lugs; 133-a first step groove; 137-a second step groove; 139-a base plate; 141-water-cooling plates; 143-a third step groove; 145-a first mounting groove; 149-a first seal ring; 151-second mounting groove; 153-a top cover; 154-a first skirt; 155-mating holes; 157-a cross beam; 159-longitudinal beams; 161-avoidance slots; 163-first concave trough; 165-a second recessed groove; 167-pore section; 169-high pressure box; 171-a cover; 173-cavity; 175-a housing ring groove; 177-a second skirt; 179-opening the hole; 181-mounting block; 183-fastening holes; 185-weight loss cavity; 187-thinning the groove; 189-reinforcing ribs; 191 — a first through hole; 193-a second via; 195-connecting plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the related art, the box body of the battery pack has the problems of low assembly efficiency and poor stability, and the assembly efficiency and the quality of the battery pack are seriously influenced. In view of this, this embodiment provides a box and battery package that convenient dismantlement, assembly efficiency is high, can improve the assembly efficiency and the quality of battery package. The structure of the battery pack will be described in detail below.

Fig. 1 is a schematic structural diagram of a battery pack 100 according to the present embodiment; fig. 2 is an exploded view of the battery pack 100 according to the present embodiment; fig. 3 is a schematic partial structural diagram i of a box 103 of the battery pack 100 according to the present embodiment; fig. 4 is a schematic diagram of a partial structure of the box 103 of the battery pack 100 according to the second embodiment. Referring to fig. 1 to 4, the present embodiment provides a battery pack 100, which includes a case 103 and a battery module 101. The case 103 is used to mount the battery module 101 to ensure safety and reliability of the battery module 101, so that the battery pack 100 can stably and reliably perform charging and discharging operations to ensure work efficiency and quality.

In detail, the box 103 is substantially rectangular, and the box 103 includes a plurality of annular boundary beams arranged at intervals in sequence, each boundary beam is substantially rectangular, the ends of any two adjacent boundary beams are connected through at least one corner connector 109, the two sides of each corner connector 109 are detachably matched with the two adjacent boundary beams, and the plurality of corner connectors 109 and the plurality of boundary beams enclose an annular structure for mounting the battery module 101.

The box body 103 is convenient for assembling the boundary beams to obtain the box body 103 through the arrangement of the boundary beams and the corner connecting pieces 109, the assembling efficiency can be improved, the corner connecting pieces 109 can be detachably matched with the boundary beams, the disassembly and the maintenance can also be convenient, and the disassembly and the maintenance efficiency can be improved; in addition, because the boundary beams and the corner connectors 109 are detachably matched, when a larger or larger number of battery modules 101 need to be accommodated, the number of the boundary beams and the corner connectors 109 only needs to be increased according to the requirement, and the advantages of convenience and stability in expansion are achieved; meanwhile, the stability of the box body 103 can be ensured by assembling the corner connectors 109 and the edge beams into an annular structure, so that the stability and reliability of the battery module 101 are ensured, and the assembly efficiency and quality of the battery pack 100 are improved.

It should be noted that, in this embodiment, the edge beams are all of a profile structure, so that the strength is high, the weight is low, and the energy density of the battery pack 100 can be ensured. Meanwhile, the number of the edge beams is four, the two first beams 105 and the two second beams 107 are provided, the two first beams 105 are identical in structure and are arranged in parallel at intervals, the two second beams 107 are also identical in structure and are arranged in parallel at intervals, and the two first beams 105 and the two second beams 107 are arranged in a ring shape. Correspondingly, the number of the corner connectors 109 is four, two adjacent edge beams are connected through one corner connector 109, and two sides of each corner connector 109 are respectively connected with the first beam 105 and the second beam 107. Through the setting of four corner connection pieces 109, two first roof beams 105 and two second roof beams 107, can enclose into ring structure to fully guarantee stability and reliability after battery module 101 installs. Of course, in other embodiments, the number of the edge beams may be adjusted according to requirements, and the number of the corner connectors 109 between any two adjacent edge beams may also be adjusted according to requirements, for example, two corner connectors 109 arranged side by side in the vertical direction may be disposed between any two adjacent edge beams, and the like, which is not limited in this embodiment.

It should be further noted that, in order to further ensure the stability and reliability of the battery module 101 after installation, in this embodiment, the box 103 further includes a top cover 153 and a bottom plate 139, where the top cover 153 and the bottom plate 139 are respectively located at two sides of the annular structure and are used for closing openings at two sides of the annular structure, so that the battery module 101 can be located in a closed space surrounded by the top cover 153, the bottom plate 139 and the annular structure, and thus, the safety and reliability of the battery module 101 can be sufficiently improved. Meanwhile, a water cooling plate 141 can be arranged between the bottom plate 139 and the battery module 101 according to requirements, so that the battery module 101 is at a safe temperature in the charging and discharging operation process, and the safety and reliability of the charging and discharging operation are ensured.

Fig. 5 is a first schematic structural diagram of the corner connector 109 of the box 103 according to this embodiment; fig. 6 is a second schematic structural diagram of the corner connector 109 of the box 103 according to this embodiment; fig. 7 is a first schematic structural diagram of the first beam 105 of the box 103 according to this embodiment; fig. 8 is a second structural schematic diagram of the first beam 105 of the box 103 provided in this embodiment; fig. 9 is a first structural schematic diagram of the second beam 107 of the box 103 provided in this embodiment; fig. 10 is a second structural schematic diagram of the second beam 107 of the box 103 according to this embodiment. Referring to fig. 4 to 10, in the present embodiment, the corner connecting member 109 is detachably connected to the first beam 105 or the second beam 107 at a corresponding position by plugging. The insertion matching can facilitate the user to carry out the installation, the disassembly and the maintenance operation, and can improve the efficiency of the installation, the disassembly and the maintenance operation. Certainly, in other embodiments, the connection mode between the corner connectors 109 and the edge beam may also be fastening connection through screws or bolts, bonding through glue, magnetic attraction, fastening, etc., so as to ensure the stability and reliability of the box 103, which is not limited in this embodiment.

In detail, referring to fig. 5 and fig. 6 again, in order to realize the insertion fit between the corner connecting member 109 and the first beam 105 or the second beam 107, in the present embodiment, two sides of the corner connecting member 109 are respectively provided with a protrusion 115, and the protrusion 115 may be in a strip square structure, a triangular column structure, or even a cylindrical structure, and is disposed to protrude from the surface of the corner connecting member 109. Correspondingly, the positions of the two first beams 105 and the two second beams 107, which are matched with the corner connecting pieces 109, are correspondingly provided with lightening grooves 117, so that the bulges 115 on two sides of each corner connecting piece 109 are respectively inserted into the lightening grooves 117 of the two adjacent edge beams. On one hand, through the arrangement of the weight reducing grooves 117, the weight of the edge beams can be reduced to improve the energy density of the battery pack 100, and on the other hand, through the cooperation of the weight reducing grooves 117 and the protrusions 115, the weight reducing grooves 117 can be fully utilized to realize the stable cooperation of the corner connecting pieces 109 and the first beams 105 and the second beams 107, so that the stability and the reliability of the box body 103 can be improved, and further the working efficiency and the quality of the battery pack 100 can be fully ensured.

Of course, in other embodiments, the weight-reducing grooves 117 may be formed on both sides of the corner connection, and the protrusions 115 may be disposed on the corresponding positions of the first beam 105 and the second beam 107, so that the protrusions 115 may be matched with the weight-reducing grooves 117, which is not limited in this embodiment.

Meanwhile, it should be noted that, in this embodiment, since both ends of each of the first beam 105 and the second beam 107 are to be matched with one corner connector 109, for convenience of manufacturing and processing, the weight reduction grooves 117 formed on the first beam 105 and the second beam 107 may be through grooves extending along the length direction thereof, so that both ends of the through grooves can be respectively inserted into the protrusions 115 of the two corner connectors 109, so as to ensure stability and reliability of the entire box 103.

In more detail, referring to fig. 4 to 10 again, in the present embodiment, a plurality of protrusions 115 are respectively disposed on two sides of the corner connector 109, for example, three protrusions 115 are respectively disposed on two sides of the corner connector 109 shown in fig. 5 and 6, and the three protrusions 115 have the same shape and are in a rectangular shape. Correspondingly, the first beam 105 and the second beam 107 are respectively provided with three weight-reducing grooves 117, so that the three weight-reducing grooves 117 of the first beam 105 can be inserted into the three protrusions 115 of the corresponding corner connecting piece 109, and the three weight-reducing grooves 117 of the second beam 107 can also be inserted into the three protrusions 115 of the corresponding corner connecting piece 109. Through the arrangement of the plurality of protrusions 115 and the plurality of corner connectors 109, the stability and reliability of the assembled case 103 can be further improved to ensure the working efficiency and quality of the battery pack 100. Of course, in other embodiments, the number of the protrusions 115 and the weight-reducing grooves 117 may be increased or decreased according to requirements, and the shapes of the protrusions 115 and the weight-reducing grooves 117 may also be adjusted according to requirements, so as to ensure the stability and reliability after the two are matched, which is not limited in this embodiment.

Alternatively, in the present embodiment, at least one of the plurality of protrusions 115 on each of both sides of the corner connector 109 is different from the other protrusions 115 in size or shape. By setting the shape or size of one projection 115 to be different from the other projections 115, it is possible to play a role of mistake proofing, and it is possible to ensure that the corner connector 109 and the first and second beams 105 and 107 are all in the correct positions at the time of the mounting work, thereby ensuring the mounting efficiency. For example, in the present embodiment, the three protrusions 115 on both sides of the corner connector 109 are vertically spaced, and of the three protrusions 115 on one side, the size of the protrusion 115 in the middle is smaller than the size of the protrusions 115 on both sides, and of the three protrusions 115 on the other side, the size of the protrusion 115 on the lowest side is smaller than the size of the two protrusions 115 on the upper side, so as to fully provide the error-proofing function and ensure the installation efficiency and quality. Of course, in other embodiments, any one of the three protrusions 115 may be set to be larger than the other two protrusions 115, even the three protrusions 115 may be set to have different sizes, or the three protrusions 115 may be set to have different shapes, so as to provide error prevention and indication functions, which is not limited in this embodiment.

Further preferably, referring to fig. 5 and fig. 6 again, in the present embodiment, the corner connectors 109 are disposed in an arc-shaped structure. And, angle connector 109 specifically includes segmental arc 113 and straightway 111 of connecting the setting, and straightway 111 and segmental arc 113 are used for dismantling the cooperation with two adjacent boundary beams respectively. The end surface of the arc-shaped section 113 far away from the straight-line section 111 is provided with three protrusions 115, and the end surface of the straight-line section 111 far away from the arc-shaped section 113 is also provided with three protrusions 115 to be respectively inserted into the weight-reducing grooves 117 at corresponding positions. The angle connecting piece 109 is arranged to be of an arc-shaped structure, so that the assembled box body 103 can be arranged in an annular structure, the assembling difficulty is reduced, and the assembling effect and quality are guaranteed. Of course, in other embodiments, the corner connecting member 109 may also be configured to include an arc-shaped section 113 and two straight sections 111 located at two sides of the arc-shaped section 113, where the two straight sections 111 are respectively used for detachably engaging with two adjacent edge beams; or, the corner connector 109 may also be configured to include two straight line segments 111 arranged at an included angle, and the two straight line segments 111 are respectively used for being detachably matched with two adjacent edge beams; or, can also set up angle connector 109 to two segmental arcs 113 including connecting the setting, two straightways 111 are used for respectively can dismantle the cooperation with two adjacent boundary beams, can guarantee assembly efficiency and quality can, this embodiment all does not do the restriction.

Referring to fig. 7 and 8 again, in the present embodiment, the first beam 105 includes a first connection portion 119 and a second connection portion 121 connected at an included angle, the first connection portion 119 and the second connection portion 121 are both in a long strip shape, and three weight-reducing slots 117 are opened in the first connection portion 119 to be inserted into the three protrusions 115 of the corresponding corner connection member 109. One end of the second connection portion 121 is connected to the first connection portion 119, and the other end extends toward the direction close to the battery module 101, and the second connection portion 121 is formed with one or more hollow-out grooves 118 for reducing weight, for example, two hollow-out grooves 118 are formed, and the shape of the hollow-out groove 118 may be selected to be square, circular arc or other shapes, so as to reduce the weight of the side sill.

Referring to fig. 9 and 10 again, the second beam 107 includes a third connecting portion 123 and a fourth connecting portion 125 connected at an included angle, and the third connecting portion 123 and the fourth connecting portion 125 are both in a long strip structure. The height and thickness of the third connecting portion 123 are matched with those of the first connecting portion 119, the three weight reduction grooves 117 are formed in the third connecting portion 123 and are inserted into the three protrusions 115 of the corresponding corner connecting piece 109, the fourth connecting portion 125 is located on one side, away from the battery module 101, of the third connecting portion 123 and is used for being fixed with a mounting surface, and one or more hollow grooves 118 are formed in the fourth connecting portion 125 so that the weight of the boundary beam is fully reduced and the weight of the whole box body 103 is reduced.

It should be noted that, in this embodiment, the second connection portion 121 is vertically connected to the first connection portion 119, and the third connection portion 123 is also vertically connected to the fourth connection portion 125, in other embodiments, the second connection portion 121 and the first connection portion 119 may also be arranged at other included angles, and the third connection portion 123 may also be arranged at other included angles with the fourth connection portion 125, which is not limited in this embodiment.

It should be noted that, in order to improve the stability of the entire box 103, in this embodiment, one or more fixing holes 127 are formed in at least one of the two first beams 105 and the two second beams 107, and the fixing holes 127 are used for fastening the box 103 to the mounting surface by fasteners such as screws or bolts. For example, in the present embodiment, at least one mounting ear 129 (e.g., two in fig. 8) is disposed on a side of the first connecting portion 119 away from the second connecting portion 121, each mounting ear 129 has a fixing hole 127, and the fourth connecting portion 125 has a plurality of fixing holes 127, each fixing hole 127 is used for fastening the box 103 to the mounting surface by a fastening member, and a bottom wall of the fourth connecting portion 125 has a thickness greater than a top thickness, so as to meet a strength requirement when the box 103 is mounted to the mounting surface by the fastening member. Through the setting of a plurality of fixed orificess 127 and a plurality of fastener, can fully improve the stability and the reliability after the installation of box 103 to guarantee the stability and the reliability of whole battery package 100. Of course, in other embodiments, the position and the number of the fixing holes 127 may also be adjusted according to requirements, and the embodiment is not limited.

In addition, it should be noted that, since the fourth connecting portion 125 is used for being matched with the mounting surface, a reinforcing structure may be further disposed in the hollow-out groove 118 of the fourth connecting portion 125 according to requirements, for example, a bushing may be welded in the hollow-out groove 118 to reinforce the strength of the whole fourth connecting portion 125, so as to ensure the strength and quality of the whole box 103 and ensure the efficiency and quality of the battery charging and discharging operations.

Referring to fig. 4 to 10 again, in the present embodiment, the lower end of the first connection portion 119 of the first beam 105 protrudes outward relative to the second connection portion 121, so that a first step groove 133 can be formed between the end of the first connection portion 119 and the second connection portion 121. Meanwhile, the lower end of the third connecting portion 123 of the second beam 107 is also correspondingly provided with a first step groove 133, a connecting plate 195 is arranged between the arc-shaped section 113 and the straight section 111 of the corner connecting member 109, a second step groove 137 is formed in the lower portion of the connecting plate 195, the plurality of first step grooves 133 and the plurality of second step grooves 137 enclose an annular groove, and the bottom plate 139 is inserted into the annular groove. Through setting up like this for bottom plate 139 obtains improving with annular structure complex stability, can fully guarantee the stability and the reliability of box 103, also can reduce the use of fasteners such as screw or bolt, alleviates box 103 weight, improves assembly efficiency and quality, guarantees battery package 100's energy density. Of course, in other embodiments, the first stepped groove 133 of the first beam 105 may be opened in the second connection portion 121, and the first stepped groove 133 of the second beam 107 may be opened in the fourth connection portion 125, etc., so as to ensure stability and reliability after the bottom plate 139 is engaged with the annular groove, which is not limited in this embodiment.

Alternatively, in the embodiment, when the bottom plate 139 is inserted into the annular groove, the water-cooling plate 141 is just abutted by the annular structure surrounded by the first beam 105, the corner connector 109 and the second beam 107, and specifically, the end of the second connecting portion 121 of the first beam 105, the end of the connecting plate 195 of the corner connector 109 and the end of the third connecting plate 195 of the second beam 107 are abutted with the water-cooling plate 141 in the circumferential direction, so as to sufficiently improve the stability of the water-cooling plate 141.

Further optionally, in this embodiment, at least one of the end of the second connection portion 121 of the first beam 105, the end of the connection plate 195 of the corner connector 109, and the end of the third connection plate 195 of the second beam 107 may also be provided with a third step groove 143 according to requirements, for example, in this embodiment, the end of the third connection plate 195 far from the fourth connection plate 195 is provided with a plurality of third step grooves 143, so that the water cooling plate 141 can be inserted into any one of the plurality of third step grooves 143, and the end of the second connection portion 121 of the first beam 105 and the end of the connection plate 195 of the corner connector 109 at other positions of the water cooling plate 141 are abutted, so as to sufficiently ensure the stability and reliability of the water cooling plate 141.

Referring to fig. 4 to 10 again, in the present embodiment, the thickness of the end of the first connecting portion 119 of the first beam 105 far away from the second connecting portion 121 is thicker than the thickness of the position where the weight-reducing groove 117 is formed, and the upper portion of the position is formed with the first mounting groove 145. The thickness of the end of the third connecting portion 123 of the second beam 107, which is far from the fourth connecting portion 125, is also relatively thicker than the thickness of the position where the lightening groove 117 is formed, and the first mounting groove 145 is also formed at this position. Meanwhile, a second mounting groove 151 has been provided on the upper portions of the arc segment 113 and the straight line segment 111 of each corner connector 109, and a plurality of first mounting grooves 145 and a plurality of second mounting grooves 151 are communicated to form a mounting ring groove. The box body 103 further comprises a first sealing ring 149, the first sealing ring 149 is accommodated in the mounting ring groove and is located between the annular structure and the top cover 153, so that a sealing effect is provided for the whole box body 103, and the safety and the reliability of the battery module 101 are ensured.

As an optional scheme, in this embodiment, the top cover 153 has a first skirt 154 with a reduced thickness in the circumferential direction, the first skirt 154 is provided with a plurality of matching holes 155 at intervals, the top of the first connecting portion 119 of the first beam 105 and the top of the third connecting portion 123 of the second beam 107 are also provided with a matching hole 155 correspondingly, and the two matching holes 155 at corresponding positions are fastened and connected by a fastener, so as to sufficiently ensure the stability and reliability of the top cover 153 after installation, and also ensure the sealing effect and quality of the first sealing ring 149 correspondingly, thereby ensuring the safety and reliability of the battery module 101.

Further alternatively, the top cover 153 has a recess groove recessed in a direction close to the battery module 101. The depressed slot has open-ended semi-closed groove for the top, and for the plate body of top cap 153 to the direct sunken formation of the direction that is close to battery module 101, it sets up through buckling, can increase whole top cap 153's intensity to guarantee battery module 101's security and reliability.

Specifically, the concave groove includes a first concave groove 163 and a second concave groove 165. The number of the first concave grooves 163 is plural, the plural first concave grooves 163 are arranged at intervals along a first direction (that is, ab direction in fig. 1), each first concave groove 163 extends and is formed along the first direction, the number of the second concave grooves 165 is plural, the plural second concave grooves 165 are arranged at intervals along the first direction, the plural second concave grooves 165 and the plural first concave grooves 163 are alternately formed along the first direction, and each second concave groove 165 extends and is formed along a second direction (that is, cd direction in fig. 1) perpendicular to the first direction. Through the arrangement of the plurality of first recess grooves 163 and the plurality of second recess grooves 165, the strength of the top cover 153 can be sufficiently ensured to improve the safety and reliability of the battery module 101. Of course, in other embodiments, the extending direction and the number of the first concave groove 163 and the second concave groove 165 may be adjusted according to the requirement, and the embodiment is not limited.

Further alternatively, referring to fig. 3 again, in the present embodiment, the box body 103 further includes at least one cross beam 157, the cross beam 157 is also selected as a profile structure, the cross beam 157 is disposed in the ring structure along a third direction (also the first direction, i.e., ab direction in fig. 1), the cross beam 157 is configured to cooperate with an inner peripheral side of the ring structure, and when the battery module 101 is disposed in the ring structure, the cross beam 157 is configured to be connected with the battery module 101. On one hand, the strength of the annular structure of the box body 103 can be enhanced through the arrangement of the cross beam 157, and the influence of vibration impact on the battery module 101 is reduced; on the other hand, the stability and reliability of the battery module 101 can be enhanced through the arrangement of the cross beam 157, so that the stability and reliability of charging and discharging operation are fully ensured, and the operation efficiency and quality are ensured. Of course, in other embodiments, the extending direction of the cross beam 157 may also be other directions forming an included angle with the first direction, which can enhance the strength of the box 103 and ensure the stability of the battery module 101, and this embodiment is not limited.

Furthermore, the box 103 comprises at least one longitudinal beam 159, the longitudinal beam 159 also being selected as a profile structure, the longitudinal beam 159 extending in a fourth direction (also the second direction, i.e. the cd-direction in fig. 1) being arranged within the ring and engaging the inner circumference of the ring. Meanwhile, since the longitudinal beam 159 extends in the same direction as the first concave groove 163, one or more holes 167 may be formed in the bottom of the first concave groove 163, so that the top cover 153 may be fastened to the longitudinal beam 159 by a fastener, thereby further improving the stability and reliability of the top cover 153 and ensuring the safety and stability of the battery module 101. That is, by the arrangement of the longitudinal beams 159, not only the strength of the box body 103 can be enhanced, but also the stability of the top cover 153 can be ensured, so that the stability and reliability of the charging and discharging operation of the battery pack 100 can be fully ensured.

In the present embodiment, the number of the cross beam 157 and the longitudinal beam 159 is one, and the cross beam 157 and the longitudinal beam 159 intersect to divide the whole annular structure into four annular regions, and at least one battery module 101 can be disposed in each annular region. Meanwhile, the longitudinal beam 159 is provided with an avoiding groove 161 for the cross beam 157 to pass through, so that the box body 103 is convenient to mount, dismount and assemble, and the working efficiency and quality are ensured. Of course, in other embodiments, the number of the cross beams 157 and the longitudinal beams 159 may be increased or decreased according to requirements, and the embodiment is not limited.

Fig. 11 is a first schematic structural diagram of the high-voltage box 169 of the box 103 according to this embodiment; fig. 12 is a second schematic structural diagram of the high-voltage box 169 of the box 103 according to this embodiment. Referring to fig. 11 and 12, in the present embodiment, the box 103 further includes a high voltage box 169 disposed outside the ring structure, the high voltage box 169 has a cavity 173, and the cavity 173 is used for accommodating the BDU and/or the BMS. On the one hand, with external the reducing box 103's of high-pressure box 169 volume, be convenient for realize the design of battery package 100 lightness and handiness, on the one hand, high-pressure box 169 is external can guarantee the stability and the reliability of BDU and/or BMS installation to guarantee the stability and the reliability of battery package 100 charge-discharge operation.

In the present embodiment, the high voltage box 169 has a substantially rectangular parallelepiped structure with an opening, the height of the high voltage box 169 is equal to the height of the case 103, and a plurality of first through holes 191 are formed at a side close to the case 103, the first through holes 191 may be circular holes or square holes or through holes with other shapes, and the first through holes 191 are convenient for the high voltage copper plate, the low voltage wire harness and the cooling water pipe of the battery pack 100 to pass through, thereby ensuring the usability of the battery pack 100.

Fig. 13 is a schematic structural diagram of a cover 171 of the box 103 according to this embodiment. Referring to fig. 13, in the present embodiment, the high-voltage box 169 further includes a cover 171, the cover 171 is of a plate-shaped structure and covers the cavity 173, the peripheral edge of the cover 171 has a second skirt 177, a plurality of openings 179 are formed in corresponding positions of the top of the high-voltage box 169 and the second skirt 177, and the openings 179 can be fastened and connected to the cover 171 and the high-voltage box 169 by fasteners, so as to ensure stability and reliability of the cover 171. Meanwhile, the top of the high pressure box 169 is provided with an accommodating ring groove 175, and the box body 103 further comprises a second sealing ring, which is accommodated in the accommodating ring groove 175 and located between the cover body 171 and the high pressure box 169 to ensure sealing performance and safety and reliability of the BDU and/or the BMS located in the cavity 173. In addition, one or more second through holes 193 are formed in the cover 171, and the second through holes 193 are used for facilitating the connection of the BDU and/or the BMS to external connectors, so as to ensure the efficiency and quality of the operation of the battery pack 100.

Referring to fig. 11 and 12 again, in the present embodiment, at least one mounting block 181 is connected to the high voltage box 169, for example, two sides of the high voltage box 169 are respectively provided with one mounting block 181, the bottom of the mounting block 181 is flush with the bottom of the high voltage box 169, the height of the mounting block 181 is smaller than the height of the high voltage box 169, and the mounting block 181 is provided with a fastening hole 183 through which a fastening member is inserted, the fastening hole 183 is used for fastening the high voltage box 169 to the mounting surface. Stability and reliability after the box body 103 is installed can be further improved through the arrangement of the installation block 181, and the operation quality and efficiency are ensured. Of course, in other embodiments, the number of the mounting blocks 181 and the number of the fastening holes 183 on each mounting block 181 may be adjusted according to requirements, and the embodiment is not limited thereto.

Optionally, in this embodiment, the mounting block 181 is provided with a weight reduction cavity 185 in the height direction (i.e., the ef direction in fig. 1), and the weight reduction cavity 185 can reduce the weight of the mounting block 181, so as to reduce the weight of the entire case 103, ensure the requirement of light weight, and ensure the energy density of the battery pack 100. The number of the weight reducing cavities 185 may be multiple, and the shape of the weight reducing cavities 185 may be a triangle, a square, etc., which are not limited in this embodiment.

Further optionally, in this embodiment, a thinning groove 187 is formed in the bottom of the high voltage box 169, and after the thinning groove 187 is thinned, the thickness of the bottom of the high voltage box 169 is thinner than the thickness of the periphery of the high voltage box 169, so that the mass of the whole high voltage box 169 can be reduced, the mass of the whole battery pack 100 can be reduced, and the energy density of the battery pack 100 can be improved. Meanwhile, reinforcing ribs 189 can be arranged in the thinning groove 187 as required to reinforce the strength of the high-voltage box 169 and ensure the reliability and stability of the whole battery pack 100.

It should be noted that, in this embodiment, the thinning groove 187 is rectangular, the reinforcing ribs 189 are long, the number of the reinforcing ribs 189 is multiple, and the plurality of reinforcing ribs 189 are arranged in a staggered manner to divide the rectangular thinning groove 187 into a plurality of small rectangular grooves, so that the mass of the box body 103 is sufficiently reduced, and meanwhile, the strength of the box body 103 is ensured, so as to ensure the stability and reliability of the charging and discharging operations of the battery pack 100.

The following describes the installation process, operation principle and beneficial effects of the battery pack 100 according to the embodiment of the present invention in detail:

when the battery pack 100 is mounted, the two first beams 105, the two second beams 107 and the four corner connectors 109 may be assembled to form an annular structure, the bottom plate 139 may be inserted into the annular groove, and the circumferential direction of the water cooling plate 141 may be abutted against the annular structure; then, the cross member 157 and the longitudinal member 159 are disposed in the annular structure, the battery module 101 is disposed in the annular structure, and the BDU and the BMS are disposed in the high voltage box 169; finally, the first sealing ring 149 is accommodated in the mounting ring groove, the second sealing ring is accommodated in the accommodating ring groove 175, the top cover 153 is covered outside the annular structure and is tightly connected with the annular structure, and the cover plate is covered outside the high-pressure box 169 and is tightly connected with the high-pressure box 169. After the mounting is completed, the battery pack 100 is charged and discharged.

In the process, the box body 103 is convenient to assemble quickly to obtain the box body 103 through the arrangement of the edge beams, the corner connectors 109, the top cover 153, the bottom plate 139 and the high-pressure box 169, the assembly efficiency can be improved, the corner connectors 109 and the edge beams can be matched in a detachable mode, the bottom plate 139 and the annular structure can be matched in a detachable mode, disassembly and maintenance can be facilitated, and the disassembly and maintenance efficiency can be improved; meanwhile, the corner connectors 109 and the edge beams are assembled to form an annular structure, the top cover 153 is tightly connected with the annular structure, and the bottom plate 139 is plugged into the annular structure to guarantee the stability of the assembled box body 103, so that the stability and reliability of the battery module 101 can be guaranteed, and the assembly efficiency and quality of the battery pack 100 can be effectively improved.

In summary, the embodiments of the present invention provide the case 103 and the battery pack 100 with high assembly efficiency and stability, which can ensure the assembly efficiency and quality of the battery pack 100.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (27)

1. The utility model provides a box for install battery module, its characterized in that includes:

be cyclic annular a plurality of boundary beams of interval arrangement in proper order, arbitrary adjacent two connect through at least one corner connecting piece between the tip of boundary beam, and every the both sides of corner connecting piece respectively with adjacent two the cooperation can be dismantled to the boundary beam, it is a plurality of corner connecting piece and a plurality of the boundary beam encloses into and is used for the installation the loop configuration of battery module.

2. The cabinet as claimed in claim 1, wherein:

the two sides of the corner connecting piece are respectively provided with a bulge, each edge beam is correspondingly provided with a weight reduction groove, and the bulges on the two sides of the corner connecting piece are respectively inserted into the weight reduction grooves of the two adjacent edge beams;

or,

and weight reduction grooves are formed in two sides of the corner connecting piece, two ends of each edge beam are correspondingly provided with protrusions, and the weight reduction grooves in the two sides of the corner connecting piece are respectively spliced with the protrusions of the two adjacent edge beams.

3. The cabinet as claimed in claim 2, wherein:

the end parts of any two adjacent boundary beams are connected through one corner connecting piece, a plurality of bulges are respectively arranged on two sides of the corner connecting piece, a plurality of weight reducing grooves matched with the bulges on each side of two sides of the corner connecting piece are formed in the length direction of each boundary beam in a penetrating mode, and two ends of each weight reducing groove of each boundary beam are respectively connected with the bulges of the corresponding corner connecting piece in an inserting mode.

4. A cabinet as claimed in claim 3, wherein:

at least one of the projections on each of the two sides of the corner connector is sized or shaped differently than the other projections.

5. The cabinet as claimed in claim 4, wherein:

the two sides of the corner connecting piece are respectively provided with three bulges, the three bulges on each side are arranged at intervals along the height direction of the corner connecting piece, and the size of the bulge positioned in the middle of the three bulges on each side is smaller than or larger than the sizes of the two bulges positioned on the two sides;

or,

the two sides of the corner connecting piece are respectively provided with three bulges, the three bulges on one side of the two sides are arranged at intervals along the height direction of the corner connecting piece, and the size of the bulge positioned at the lowest part in the three bulges is smaller than or larger than the sizes of the other two bulges; the three bulges on the other side of the two sides are arranged at intervals along the height direction of the corner connecting piece, and the size of the bulge positioned in the middle of the three bulges is smaller than or larger than the sizes of the other two bulges.

6. The cabinet according to any one of claims 1 to 5, wherein:

the box includes four boundary beams, and is two first roof beams and two second roof beams respectively, two first roof beam parallel and interval set up, two the second roof beam parallel and interval set up, two first roof beam and two the second roof beam is cyclic annular interval arrangement, the box includes four the corner connector, every the both sides of corner connector respectively with first roof beam with the second roof beam is connected.

7. The cabinet as claimed in claim 6, wherein:

the first beam comprises a first connecting part and a second connecting part which are connected in an included angle, the first connecting part is used for being detachably matched with the corresponding corner connecting piece, and the second connecting part extends towards the direction close to the battery module; the second roof beam is including being third connecting portion and the fourth connecting portion that the contained angle is connected, the third connecting portion be used for with correspond the cooperation can be dismantled to the corner joint spare, the fourth connecting portion are located the third connecting portion are kept away from one side of battery module.

8. The cabinet as claimed in claim 6, wherein:

at least one of the four boundary beams is provided with a fixing hole, and the fixing hole is used for fastening the box body on a mounting surface through a fastener.

9. The cabinet as claimed in claim 8, wherein:

the first beam is provided with at least one mounting lug, the mounting lug is provided with the fixing hole, the second beam is provided with the fixing hole, and each fixing hole is used for fastening the box body on the mounting surface through one fastener.

10. The cabinet according to any one of claims 1 to 5, wherein:

the lower part of each edge beam is provided with a first step groove, the lower part of each corner connecting piece is provided with a second step groove, and the plurality of first step grooves and the plurality of second step grooves form an annular groove in a surrounding manner;

the box body further comprises a bottom plate, and the bottom plate is connected with the annular groove in an inserting mode.

11. The cabinet as claimed in claim 10, wherein:

the water cooling plate is arranged in the box body and arranged on the bottom plate, and the annular structure is abutted to the water cooling plate in the circumferential direction.

12. The cabinet as claimed in claim 11, wherein:

a plurality of third step grooves are formed in at least one of the edge beams and the corner connectors, and the water cooling plate is connected with the third step grooves in an inserted mode.

13. The cabinet according to any one of claims 1 to 5, wherein:

the upper part of each edge beam is provided with a first mounting groove, the upper part of each corner connecting piece is provided with a second mounting groove, and the first mounting grooves and the second mounting grooves are communicated to form mounting ring grooves;

the box body further comprises a top cover and a first sealing ring, the top cover is arranged at the end part of the annular structure in a covering mode, and the first sealing ring is contained in the mounting ring groove and located between the annular structure and the top cover.

14. The cabinet as claimed in claim 13, wherein:

the top cover and the position opposite to the annular structure are annularly provided with a plurality of matching holes, and each matching hole is fixedly connected with the annular structure through a fastener.

15. The cabinet according to any one of claims 1 to 5, wherein:

the corner connecting piece comprises an arc-shaped section and two straight line sections positioned on two sides of the arc-shaped section, and the two straight line sections are respectively used for being detachably matched with two adjacent boundary beams;

or,

the corner connecting piece comprises an arc-shaped section and a straight section which are connected, and the straight section and the arc-shaped section are respectively used for being detachably matched with two adjacent boundary beams;

or,

the angle connecting piece comprises two straight line sections which are arranged at an included angle, and the two straight line sections are respectively used for being detachably matched with two adjacent boundary beams;

or,

the corner connector comprises two arc sections which are connected and arranged, and the two straight sections are respectively used for being detachably matched with two adjacent boundary beams.

16. The cabinet according to any one of claims 1 to 5, wherein:

the box body further comprises at least one cross beam, the cross beam is arranged in the annular structure along the third direction and matched with the inner peripheral side of the annular structure, and when the battery module is arranged in the annular structure, the cross beam is used for being connected with the battery module.

17. The cabinet according to any one of claims 1 to 5, wherein:

the box body further comprises at least one longitudinal beam, and the longitudinal beam extends in the annular structure along a fourth direction and is matched with the inner peripheral side of the annular structure.

18. The cabinet according to any one of claims 1 to 5, wherein:

the box body further comprises a cross beam and a longitudinal beam which are arranged in an intersecting mode, and an avoidance groove for the cross beam to penetrate is formed in the longitudinal beam.

19. The cabinet according to any one of claims 1 to 5, wherein:

the box body further comprises a top cover which covers the end part of the annular structure, and the top cover is provided with a concave groove which is concave towards the direction close to the battery module.

20. The cabinet as claimed in claim 19, wherein:

the depressed trench includes first depressed trench and second depressed trench, just the quantity of first depressed trench is a plurality of, and is a plurality of first depressed trench sets up along first direction interval, and every first depressed trench all follows the first direction is extended and is seted up, the quantity of second depressed trench is a plurality of, and is a plurality of the second depressed trench is followed first direction interval sets up, and is a plurality of the second depressed trench is with a plurality of first depressed trench is followed the first direction is seted up in turn, every the second depressed trench all along with the second direction that the first direction is the contained angle extends the setting.

21. The cabinet according to any one of claims 1 to 5, wherein:

the box body further comprises a high-voltage box arranged outside the annular structure, the high-voltage box is provided with a cavity, and the cavity is used for accommodating the BDU and/or the BMS.

22. The cabinet as claimed in claim 21, wherein:

the high-pressure box further comprises a cover body, the cover body is arranged outside the cavity in a covering mode, an accommodating ring groove is formed in the top of the high-pressure box, the box body further comprises a second sealing ring, and the second sealing ring is accommodated in the accommodating ring groove and located between the cover body and the high-pressure box.

23. The cabinet as claimed in claim 22, wherein:

the lid with the relative position of high-pressure box tip is cyclic annular and has seted up a plurality of trompils, every trompil all be used for through a fastener with high pressure and fastening connection.

24. The cabinet as claimed in claim 21, wherein:

the high-voltage box is connected with at least one mounting block, the mounting block is provided with a fastening hole in a penetrating mode, and the fastening hole is used for fastening the high-voltage box to a mounting surface through a fastening piece.

25. The cabinet as claimed in claim 24, wherein:

and the mounting block is provided with a weight reduction cavity.

26. The cabinet as claimed in claim 21, wherein:

the bottom of the high-voltage box is provided with a thinning groove;

or,

the bottom of high pressure box has seted up the attenuate recess, be provided with the strengthening rib in the attenuate recess.

27. A battery pack, comprising:

the case of any one of claims 1 to 26;

and the battery module is arranged in the annular structure of the box body.

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