CN218160635U

CN218160635U - Boundary beam, battery package lower casing and vehicle

Info

Publication number: CN218160635U
Application number: CN202122020128.2U
Authority: CN
Inventors: 周月; 黄文�; 薛文昊
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-12-27
Anticipated expiration: 2031-08-25

Abstract

The utility model provides a pair of casing and vehicle under boundary beam, battery package relates to power battery technical field to optimize the structure of boundary beam to a certain extent, promote welding strength, reduce welding process. The utility model provides a boundary beam for form the lower casing of battery package, including first installation component, second installation component and third installation component; the second mounting component extends along the first direction, the first mounting component and the third mounting component are respectively positioned at two sides of the second mounting component and are connected with the second mounting component, and the first mounting component and the third mounting component are respectively arranged at an angle with the second mounting component; an extension part is formed on one side of the first mounting component far away from the second mounting component, and a bottom plate of the lower shell is connected with the extension part.

Description

Boundary beam, battery package lower casing and vehicle

Technical Field

The utility model belongs to the technical field of the power battery technique and specifically relates to a casing and vehicle under boundary beam, battery package.

Background

The new energy automobile is an automobile which adopts unconventional automobile fuel as a power source, integrates advanced technologies in the aspects of power control and driving of the automobile, and is advanced in technical principle, new in technology and new in structure.

In the process of replacing the automobile power source from fuel oil to a battery, the strength of the lower shell is related to the safety and the service life of the whole vehicle. But the lower shell adopted at the present stage still needs to be welded in a partitioning mode, and the more welding positions, the greater the risk of fracture from the welding position in the using process.

Therefore, it is desirable to provide a side sill, a battery pack lower case and a vehicle, which solve the problems of the prior art to some extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a casing and vehicle under boundary beam, battery package to optimize the boundary beam structure to a certain extent, promote welding efficiency, realize the lightweight of boundary beam.

The utility model provides a boundary beam for forming a battery pack lower shell, which comprises a first mounting component, a second mounting component and a third mounting component; the second mounting component extends along a first direction, the first mounting component and the third mounting component are respectively positioned at two sides of the second mounting component and are connected with the second mounting component, and the first mounting component and the third mounting component are respectively arranged at an angle with the second mounting component; an extension part is formed on one side, away from the second mounting component, of the first mounting component, and a bottom plate of the lower shell is connected with the extension part.

The first mounting component comprises a substrate and a first mounting part, the first mounting part is arranged on the substrate, and one side of the substrate, which is far away from the second mounting component, protrudes out of the first mounting part and forms the extension part; one side that first installation department kept away from second installation component is formed with a plurality of locating holes, and is a plurality of first locating hole is followed first direction interval sets up.

Specifically, be formed with a plurality of location punch combination on the first installation department, it is a plurality of location punch combination follows the first direction interval sets up, and every location punch combination all includes a plurality of second locating holes, be equipped with the setting element in the second locating hole.

Furthermore, a first cavity is formed in the first mounting part, and the first cavity penetrates through the first mounting part along the first direction; a first reinforcing rib is formed in the first cavity along the first direction, and the first cavity can be separated by the first reinforcing rib.

The second mounting component is arranged along the vertical direction, a plurality of third fixing holes are formed in one end, far away from the first mounting component, of the second mounting component, the third fixing holes are arranged at intervals along the first direction, and positioning columns are arranged in the third fixing holes.

Specifically, a second cavity is formed in the second mounting member, and the second cavity penetrates through the second mounting member along the first direction.

Furthermore, a second reinforcing rib extending along the first direction and separating the second cavity along the horizontal direction and/or a third reinforcing rib extending along the first direction and separating the second cavity along the oblique direction are formed in the second cavity.

More specifically, a plurality of fourth fixing holes are formed in the third mounting member, and the plurality of fourth fixing holes are arranged at intervals along the first direction; a third cavity is formed in the third mounting component and penetrates through the third mounting component along the first direction; a fourth reinforcing rib is formed in the third cavity, the fourth reinforcing rib is of a double-cross structure, and the fourth reinforcing rib extends in the first direction.

Compared with the prior art, the utility model provides a boundary beam has following advantage:

the utility model provides a boundary beam for form battery package lower casing, including first installation component, second installation component and third installation component; the second mounting component extends along the first direction, the first mounting component and the third mounting component are respectively positioned at two sides of the second mounting component and are connected with the second mounting component, and the first mounting component and the third mounting component are respectively arranged at an angle with the second mounting component; an extension part is formed on one side of the first mounting component far away from the second mounting component, and a bottom plate of the lower shell is connected with the extension part.

From this analysis can know, can accept the bottom plate through the extension that forms on the first mounting means, because need two boundary beams when forming the lower casing, consequently, can more stably support the bottom plate through two boundary beams that are formed with the extension to make the bottom plate can adopt a monoblock single layer board, and then when the welding, only can realize being connected of bottom plate and boundary beam with the lateral part welding of extension and bottom plate, consequently, can reduce the welding point, promote overall structure's intensity.

The second mounting member of the side sill in the present application can connect the first mounting member and the third mounting member, and can provide a mounting platform for the upper housing. And the third installation component in this application is used for making lower casing and whole car be assembled and be connected.

In addition, the utility model also provides a battery pack lower shell, which comprises the boundary beam, the bottom plate and the surrounding plate; the number of the side beams is two, the two side beams are oppositely arranged on two sides of the bottom plate, and the bottom plate is erected on the extension part and is welded with the extension part; the number of the enclosing plates is two, the enclosing plates are oppositely arranged between the two edge beams and are positioned at the edge of the bottom plate.

Adopt the boundary beam that this application provided to make bottom plate and boundary beam combine together fast to, the extension of both sides boundary beam can also further extend like the direction that is close mutually in this application, thereby further stably bearing the bottom plate, the lower shell structure that makes the formation can be more firm.

The application also provides a vehicle, which comprises the battery pack lower shell, the upper shell, the battery module and the connecting mechanism; the upper shell is correspondingly connected with one end, far away from the first mounting component, of the second mounting component, the battery module is correspondingly connected with the first mounting component, and the connecting mechanism is correspondingly connected with the third mounting component.

Adopt the vehicle of boundary beam that this application provided, on the one hand can reduce welding processes to make the lower shell structure who forms more stable, on the other hand also can provide the mounted position to the connecting elements of last casing, battery module, cold-rolled sheet and vehicle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an edge beam provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first view angle of the boundary beam according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the lower housing according to an embodiment of the present invention.

In the figure: 1-a first mounting member; 101-a substrate; 1011-extension; 102-a first mounting portion; 1021-a first positioning hole; 1022 — a second positioning hole; 1023-a positioning element; 1024 — a first cavity; 1025-a first stiffener; 2-a second mounting member; 201-a third fixing hole; 2011-location posts; 202-a second cavity; 2021-a second reinforcing bead; 2022-third strengthening rib; 3-a third mounting member; 301-a fourth fixation hole; 302-a third cavity; 303-a fourth reinforcing rib; 304-a locating sleeve; 4-a bottom plate; 5-enclosing plates;

s1-first direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "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 are conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, 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 embodiments of the present application, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

For ease of description, spatial relationship terms such as "above … …", "upper", "below … …", and "lower" may be used herein to describe the relationship of one element to another element as shown in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Fig. 1 is a schematic structural view of an edge beam provided in an embodiment of the present invention; fig. 2 is a schematic structural diagram of a first view angle of the boundary beam provided by the embodiment of the present invention.

As shown in fig. 1 and fig. 2, an edge beam provided in an embodiment of the present invention for forming a battery pack lower case includes a first mounting member 1, a second mounting member 2, and a third mounting member 3; the second installation component 2 extends along the first direction S1, the first installation component 1 and the third installation component 3 are respectively located on two sides of the second installation component 2 and are connected with the second installation component 2, and the first installation component 1 and the third installation component 3 are respectively arranged at an angle with the second installation component 2; an extension 1011 is formed on the side of the first mounting member 1 away from the second mounting member 2, and the bottom plate 4 of the lower housing is connected to the extension 1011.

In this embodiment, the bottom plate 4 can be received by the extending portion 1011 formed on the first mounting member 1, and two edge beams are required when the lower housing is formed, so that the bottom plate 4 can be more stably supported by the two edge beams formed with the extending portion 1011, and the bottom plate 4 can be a single-piece single-layer plate, and further, when welding is performed, the connection between the bottom plate 4 and the edge beams can be realized only by welding the extending portion 1011 and the side portions of the bottom plate 4, so that the welding points can be reduced, and the strength of the whole structure can be improved.

And through the second mounting component 2 of the boundary beam in this application, on one hand, can connect first mounting component 1 and third mounting component 3, on the other hand, also can provide the mounting platform to the upper casing, and third mounting component 3 in this application is used for making lower casing and whole car carry out the erection joint.

It should be added here that, preferably, in the present application, the first mounting member 1 and the third mounting member 3 are both disposed along the horizontal direction and are located on the same horizontal plane, and the second mounting member 2 is disposed along the vertical direction, so that the cross section of the formed edge beam can be T-shaped, the supporting effect of the formed edge beam can be improved, and the mounting of the battery module and the cold-rolled sheet can be more stable.

As shown in fig. 1 and fig. 2, the first mounting member 1 includes a substrate 101 and a first mounting portion 102, the first mounting portion 102 is disposed on the substrate 101, and a side of the substrate 101 away from the second mounting member 2 protrudes from the first mounting portion 102 and forms an extending portion 1011; a plurality of first positioning holes 1021 are formed on one side of the first mounting portion 102 away from the second mounting member 2, and the first positioning holes 1021 are arranged at intervals along the first direction S1.

Preferably, the substrate 101 and the first mounting portion 102 are integrally formed, and in fact, the first mounting portion 102 is formed on the substrate 101, so that one side of the substrate 101 can form an extension 1011 for soldering the base plate 4, and as shown in fig. 1 and fig. 2, the first mounting portion 102 is disposed to protrude from the substrate 101.

First locating hole 1021 can be the screw in this application, and the position that first installation department 102 corresponds first locating hole 1021 is first block, and first block extends along first direction S1, when the bolt was beaten into the screw, because first block is solid construction, consequently, can make the bolt be connected with first block steadily to can make the battery module of installing on first installation component 1 through the bolt more stable.

Specifically, as shown in fig. 1 and fig. 2, in some embodiments, a plurality of positioning hole sets are formed on the first mounting portion 102, the positioning hole sets are arranged at intervals along the first direction S1, each positioning hole set includes a plurality of second positioning holes 1022, and the positioning members 1023 are disposed in the second positioning holes 1022.

As shown in fig. 1 and fig. 2, in the present application, a plurality of second positioning holes 1022 are further formed in the first installation portion 102, and positioning members 1023 are disposed in the second positioning holes 1022, preferably, the positioning members 1023 are rivet bolts, so that a cold-rolled sheet (not shown in the figure) can be quickly installed on the first installation portion 102. During actual installation, the cold-rolled sheet is installed on the first installation portion 102, the battery module is installed on the cold-rolled sheet, and finally the upper shell is installed to form the whole battery pack.

Further preferably, as shown in fig. 1 and fig. 2, in the present application, a plurality of positioning hole sets composed of second positioning holes 1022 are formed on the first mounting portion 102, and preferably, each positioning hole set includes at least two second positioning holes 1022, and at least one second positioning hole 1022 in each positioning hole set is provided with a positioning element 1023, so that on one hand, the mounting of the cold-rolled sheet can be more stable, and on the other hand, the cold-rolled sheet can also be positioned according to different requirements.

Further, as shown in fig. 1 in combination with fig. 2, the present application further optimizes the first mounting portion 102, such that a first cavity 1024 is formed in the first mounting portion 102, and the first cavity 1024 penetrates through the first mounting portion 102 along the first direction S1; a first reinforcing bar 1025 is formed in the first cavity 1024 along the first direction S1, and the first reinforcing bar 1025 can partition the first cavity 1024.

The first direction S1 in the present application is a longitudinal direction, and the first cavity 1024 formed in the first mounting portion 102 can reduce the weight of the first mounting member 1 to some extent, thereby achieving a light weight requirement of the structure.

Preferably, the first rib 1025 in the first cavity 1024 partitions the first cavity 1024 in a vertical direction in this application, so that the supporting capability of the first mounting portion 102 can be improved to some extent. The first rib 1025 dividing the first cavity 1024 in the vertical direction is only one embodiment, and may be disposed in the horizontal direction or inclined at an angle.

It should be added that, as shown in fig. 1 and fig. 2, since the purpose of forming the first cavity 1024 is to reduce the overall weight of the first mounting member 1 to some extent, only one first rib 1025 is provided in the first cavity 1024 in this application, but a plurality of first ribs 1025 can be provided in parallel or perpendicular or crossing manner.

As shown in fig. 1 and fig. 2, in some embodiments, the second mounting member 2 is disposed along a vertical direction, a plurality of third fixing holes 201 are formed at an end of the second mounting member 2 away from the first mounting member 1, the plurality of third fixing holes 201 are disposed at intervals along the first direction S1, and positioning posts 2011 are disposed in the third fixing holes 201.

Because second installation component 2 needs to be connected with last casing in this application, and need the interval setting between last casing and the lower casing, consequently, through setting up second installation component 2 along vertical direction, and first installation component 1 and third installation component 3 connect in the one end of second installation component 2, go up the casing and install in the other end of second installation component 2 to interval setting between casing and the lower casing can be realized.

Preferably, in this application, a plurality of third fixing holes 201 are formed in the first mounting member 1, and positioning posts 2011 are disposed in the third fixing holes 201, so that the upper housing can be quickly positioned through the positioning posts 2011.

It should be added that in the present application, the number of the third fixing holes 201 is plural, and the third fixing holes 201 are arranged at intervals along the first direction S1, wherein a positioning column 2011 is arranged in a part of the third fixing holes 201, and another part of the third fixing holes 201 are screw holes, and after the upper housing is abutted to the second mounting member 2 through the positioning column 2011, the upper housing is connected to the second mounting member 2 by screwing a bolt into the screw holes.

Specifically, as shown in fig. 1 in conjunction with fig. 2, in some embodiments, a second cavity 202 is formed in the second mounting member 2, and the second cavity 202 penetrates the second mounting member 2 along the first direction S1.

Preferably, the second cavity 202 is formed in the second mounting member 2 in the present application, so that the weight of the second mounting member 2 can be reduced to some extent, and the weight of the side frame can be further reduced in cooperation with the first mounting member 1, thereby further achieving the requirement of light weight of the lower shell.

It should be noted that, in the present application, the second cavity 202 formed in the second mounting member 2 may not have the second rib 2021 and/or the third rib 2022 described below, but when the second rib 2021 and/or the third rib 2022 are not formed in the second cavity 202, the second cavity 202 formed is small to ensure the supporting force of the whole structure, so that the side wall of the second mounting member 2 is thick, and the stability of the support may also be ensured to some extent.

Further, as shown in fig. 1 in conjunction with fig. 2, in some embodiments, a second reinforcement rib 2021 and/or a third reinforcement rib 2022 are formed in the second cavity 202, the second reinforcement rib 2021 extends along the first direction S1 and divides the second cavity 202 along the horizontal direction, and the third reinforcement rib 2022 extends along the first direction S1 and divides the second cavity 202 along the oblique direction.

In some embodiments, only the second rib 2021 or only the third rib 2022 may be disposed in the second cavity 202, or both the second rib 2021 and the third rib 2022 may be disposed.

Preferably, the second reinforcing rib 2021 in the present application partitions the second cavity 202 in the horizontal direction, and the second reinforcing rib 2021 in the present application is provided in a plurality, so that the second mounting member 2 can be partitioned into a plurality of rectangular second cavities 202, thereby improving the supporting force of the second mounting member 2 to a certain extent.

Further preferably, as shown in fig. 1 and fig. 2, the third rib 2022 provided obliquely in the present application is matched with the second rib 2021 to divide the second mounting member 2 into two rectangular second cavities 202 and two triangular second cavities 202, and the third rib 2022 provided obliquely can further enhance the supporting strength of the second mounting member 2.

It should be added that, as shown in fig. 2, since in the present application, a plurality of third fixing holes 201 are formed at one end of the second mounting member 2 away from the first mounting member 1, and positioning columns 2011 and bolts need to be disposed in the third fixing holes 201, preferably, the second mounting member 2 has a second block body, and the second block body extends along the first direction S1 and is formed at one side in the second cavity 202 at the uppermost end of the second mounting member 2, so that the cross section of the second cavity 202 at the uppermost end is in an L-shaped structure.

Further, as shown in fig. 1 in combination with fig. 2, in some embodiments, a plurality of fourth fixing holes 301 are formed on the third mounting member 3, and the plurality of fourth fixing holes 301 are arranged at intervals along the first direction S1; a third cavity 302 is formed in the third mounting member 3, and the third cavity 302 penetrates through the third mounting member 3 along the first direction S1; a fourth reinforcing rib 303 is formed in the third cavity 302, the fourth reinforcing rib 303 is in a double cross shape, and the fourth reinforcing rib 303 extends along the first direction S1.

Third installation component 3 in this application is used for making the lower casing that forms can be connected with whole car fast, consequently, through the fourth fixed orifices 301 that forms on the third installation component 3 in this application, and preferably, be equipped with position sleeve 304 in the fourth fixed orifices 301, can be connected lower casing with whole car fast, realizes the quick installation of lower casing.

Further, in the third mounting member 3 of the present invention, it is preferable that the third cavity 302 is formed in the same manner, so that the weight of the third mounting member 3 can be reduced to some extent, and further, the weight of the side frame can be reduced, and the need for weight reduction of the lower case can be satisfied.

It should be added here that a preferred embodiment is provided in the present application for ensuring the supporting force of the third mounting member 3, that is, a fourth rib 303 is formed in the third cavity 302 and has a double-cross structure and extends along the first direction S1, so that the second cavity 202 can be supported to a certain extent.

In addition, the utility model also provides a battery pack lower shell, which comprises the boundary beam, a bottom plate 4 and a coaming 5; the number of the edge beams is two, the two edge beams are oppositely arranged on two sides of the base plate 4, and the base plate 4 is erected on the extension part 1011 and welded with the extension part 1011; the coamings 5 are two in number, are oppositely arranged between the two edge beams and are positioned at the edge of the bottom plate 4.

Adopt the boundary beam that this application provided to make bottom plate 4 and boundary beam combine together fast to, the extension 1011 of both sides boundary beam can also further extend like the direction that is close to each other in this application, thereby can further stably bearing bottom plate 4, make the lower shell structure who forms can be more firm.

The application also provides a vehicle, which comprises the battery pack lower shell, the upper shell, the battery module and the connecting mechanism; the upper shell is correspondingly connected with one end, far away from the first mounting component 1, of the second mounting component 2, the battery module is correspondingly connected with the first mounting component 1, and the connecting mechanism is correspondingly connected with the third mounting component 3.

It should be added here that the connection mechanism in the present application is a structure for mounting the vehicle and the lower housing, and when mounting, the cold-rolled sheet is mounted on the first mounting member 1, then the battery module is mounted on the cold-rolled sheet and connected with the first mounting member 1, then the upper housing is connected with the second mounting member 2, and finally the whole structure is mounted with the whole vehicle.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A side sill for forming a lower case of a battery pack, characterized by comprising a first mounting member (1), a second mounting member (2), and a third mounting member (3);

the second mounting component (2) extends along a first direction, the first mounting component (1) and the third mounting component (3) are respectively positioned at two sides of the second mounting component (2) and are connected with the second mounting component (2), and the first mounting component (1) and the third mounting component (3) are respectively arranged at an angle with the second mounting component (2);

an extension part (1011) is formed on one side, away from the second mounting component (2), of the first mounting component (1), and a bottom plate (4) of the lower shell is connected with the extension part (1011).

2. The edge beam according to claim 1, characterized in that the first mounting member (1) comprises a base plate (101) and a first mounting portion (102), the first mounting portion (102) being arranged on the base plate (101), and the side of the base plate (101) facing away from the second mounting member (2) protruding over the first mounting portion (102) and forming the extension (1011);

a plurality of first positioning holes (1021) are formed in one side, away from the second mounting component (2), of the first mounting portion (102), and the first positioning holes (1021) are arranged at intervals along the first direction.

3. The edge beam of claim 2, wherein the first mounting portion (102) has a plurality of positioning hole sets formed thereon, the positioning hole sets are spaced apart along the first direction, each positioning hole set includes a plurality of second positioning holes (1022), and a positioning member (1023) is disposed in each second positioning hole.

4. The sill of claim 2, wherein a first cavity (1024) is formed in the first mounting portion (102), the first cavity (1024) extending through the first mounting portion (102) in the first direction;

a first stiffener (1025) is formed within the first cavity (1024) along the first direction, and the first stiffener (1025) is capable of dividing the first cavity (1024).

5. The edge beam as claimed in claim 1, wherein the second mounting member (2) is disposed along a vertical direction, and one end of the second mounting member (2) away from the first mounting member (1) is formed with a plurality of third fixing holes (201), the plurality of third fixing holes (201) are disposed at intervals along the first direction, and positioning columns (2011) are disposed in the third fixing holes (201).

6. The edge beam according to claim 1, characterized in that a second cavity (202) is formed in the second mounting member (2), and that the second cavity (202) extends through the second mounting member (2) in the first direction.

7. The sill of claim 6, wherein a second rib (2021) extending in the first direction and dividing the second cavity (202) in a horizontal direction and/or a third rib (2022) extending in the first direction and dividing the second cavity (202) in an oblique direction are formed in the second cavity (202).

8. The edge beam according to claim 1, characterized in that a plurality of fourth fixing holes (301) are formed on the third mounting member (3), and the plurality of fourth fixing holes (301) are arranged at intervals along the first direction;

a third cavity (302) is formed in the third mounting member (3), and the third cavity (302) penetrates through the third mounting member (3) along the first direction;

a fourth reinforcing rib (303) is formed in the third cavity (302), the fourth reinforcing rib (303) is of a double-cross structure, and the fourth reinforcing rib (303) extends in the first direction.

9. A battery pack lower case, characterized by comprising the edge beam of any one of claims 1 to 8 and the bottom plate (4) and the shroud plate (5);

the number of the side beams is two, the two side beams are oppositely arranged on two sides of the base plate (4), and the base plate (4) is erected on the extension part (1011) and welded with the extension part (1011);

the number of the coamings (5) is two, the coamings are oppositely arranged between the two edge beams and are positioned at the edge of the bottom plate (4).

10. A vehicle characterized by comprising the battery pack lower case according to claim 9 above, and an upper case, a battery module, and a connecting mechanism;

the upper shell is correspondingly connected with one end, far away from the first mounting component (1), of the second mounting component (2), the battery module is correspondingly connected with the first mounting component (1), and the connecting mechanism is correspondingly connected with the third mounting component (3).