CN217239614U

CN217239614U - Lower box and battery pack with same

Info

Publication number: CN217239614U
Application number: CN202220351539.1U
Authority: CN
Inventors: 宋亮亮; 闵忠国; 孙永刚; 吴清平; 陈洪亮
Original assignee: Neusoft Reach Automotive Technology Shanghai Co Ltd
Current assignee: Neusoft Reach Automotive Technology Shanghai Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-08-19
Anticipated expiration: 2032-02-21

Abstract

The utility model provides a lower box and have its battery package, this lower box includes frame and bottom plate, and the border department at the bottom plate is enclosed to the frame, and frame and bottom plate all adopt foamed aluminum battenboard to make, and foamed aluminum battenboard includes first layer, intermediate level and the second floor that sets gradually along its thickness direction, and first layer and second floor all adopt aluminum plate to make, and the intermediate level adopts foamed aluminum to make, frame and bottom plate welded connection. Through the technical scheme that this application provided, can solve the problem that lower box among the correlation technique can't satisfy the user demand in the aspect of lightweight.

Description

Lower box body and battery pack with same

Technical Field

The utility model relates to a battery package technical field particularly, relates to a lower box and have its battery package.

Background

The lower box of battery package mainly plays the effect of protection battery safe operation, and the lower box of battery package can provide sealed safe, mechanical safety's guarantee for the battery.

In the related art, the lower box body is formed by welding aluminum alloy or sheet metal parts, and mechanical performance reinforcement is performed by adding reinforcing ribs in the aluminum alloy or adding reinforcing structures in the sheet metal.

However, the lower case in the related art cannot satisfy the use requirement in terms of light weight.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lower box and have its battery package to the lower box of solving among the correlation technique can't satisfy the problem of user demand in the aspect of lightweight.

According to the utility model discloses an aspect provides a lower box, and lower box includes frame and bottom plate, and the border department at the bottom plate is enclosed to the frame, and frame and bottom plate all adopt foamed aluminum battenboard to make, and foamed aluminum battenboard includes first layer, intermediate level and the second floor that sets gradually along its thickness direction, and first layer and second floor all adopt aluminum plate to make, and the intermediate level adopts foamed aluminum to make, frame and bottom plate welded connection.

Further, the lower box body further comprises an embedded connecting piece, and the embedded connecting piece is embedded in the outer frame and/or the bottom plate.

Further, the embedded connecting piece comprises an embedded nut.

Furtherly, the first floor sets up towards the chamber that holds that frame and bottom plate enclose jointly, and the first floor has the through-hole that runs through the setting, and pre-buried connecting piece wears to locate the through-hole and stretches into in the intermediate layer.

Further, pre-buried connecting piece includes interconnect's insertion section and spacing section, and the cross sectional dimension of spacing section is greater than the cross sectional dimension of insertion section, and the insertion section is worn to locate the through-hole and is stretched into the intermediate level, and spacing section is located the outside of foamed aluminum battenboard and sets up on the first layer.

Further, the lower box body comprises a plurality of pre-buried connecting pieces, and the plurality of pre-buried connecting pieces are arranged on the bottom plate and are arranged along the circumferential interval of the bottom plate.

Furthermore, the lower box body also comprises a middle beam, and the middle beam is positioned in an accommodating cavity enclosed by the outer frame and the bottom plate.

Furthermore, both ends of the middle beam are welded with the outer frame, and the lower surface of the middle beam is welded with the upper surface of the bottom plate.

Furthermore, the outer frame comprises a plurality of frames, the frames are arranged in one-to-one correspondence with the sides of the bottom plate, and the frames are welded and connected in sequence; and/or the porosity of the intermediate layer is between 63% and 93%.

According to the utility model discloses an on the other hand provides a battery package, and the battery package includes the lower box that the aforesaid provided.

Use the technical scheme of the utility model, this lower box body includes frame and bottom plate, and the border department at the bottom plate is established in the frame enclosure, and frame and bottom plate all adopt foamed aluminum battenboard to make. Because the first layer and the second layer of foamed aluminum battenboard all adopt aluminum plate to make, and the intermediate level adopts foamed aluminum to make for foamed aluminum battenboard's weight is lighter, thereby can alleviate the weight of box down, and then the box can satisfy the user demand in the aspect of lightweight down. And, because frame and bottom plate welded connection, the lower box has good structural strength.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a lower box provided by an embodiment of the present invention;

fig. 2 shows a partial cross-sectional view of the lower box provided by the embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. an outer frame; 11. a frame;

20. a base plate; 21. an accommodating chamber;

30. a foamed aluminum sandwich panel; 31. a first layer; 32. an intermediate layer; 33. second layer

40. Pre-burying a connecting piece; 41. an insertion section; 42. a limiting section;

50. a center sill.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the embodiment of the utility model provides a lower box body, lower box body include frame 10 and bottom plate 20, and frame 10 encloses the border department of establishing at bottom plate 20, and frame 10 and bottom plate 20 enclose jointly into the chamber that holds that is used for holding electric core module. The outer frame 10 and the bottom plate 20 are both made of foamed aluminum sandwich plates 30, each foamed aluminum sandwich plate 30 comprises a first layer 31, a middle layer 32 and a second layer 33 which are sequentially arranged in the thickness direction of the foamed aluminum sandwich plate, each first layer 31 and each second layer 33 are made of aluminum plates (6061-T6), each middle layer 32 is made of foamed aluminum, and the outer frame 10 is connected with the bottom plate 20 in a welding mode.

With the lower box body provided by this embodiment, the outer frame 10 and the bottom plate 20 are both made of foamed aluminum sandwich plates 30. Specifically, the first layer 31 and the second layer 33 of the foamed aluminum sandwich panel 30 are both made of aluminum plates, and the middle layer 32 is made of foamed aluminum, so that the foamed aluminum sandwich panel 30 is lighter in weight, the weight of the lower box body can be reduced, and the lower box body can meet the use requirement in the aspect of light weight. And, because the outer frame 10 is welded with the bottom plate 20, the lower case has good structural strength.

As shown in fig. 1 and 2, the lower box further includes a pre-buried connector 40, and the pre-buried connector 40 is embedded in the outer frame 10 and/or the bottom plate 20. Through set up pre-buried connecting piece 40 in the nowel, after in assembling parts such as electric core module to the nowel, be connected parts such as electric core module with pre-buried connecting piece 40, can realize the fixed of parts such as electric core module, be convenient for assemble parts such as electric core module.

The embedded connector 40 may be disposed only on the outer frame 10, or the embedded connector 40 may be disposed only on the bottom plate 20, or the embedded connectors 40 may be disposed on both the outer frame 10 and the bottom plate 20.

In this embodiment, the embedded connector 40 comprises an embedded nut. The components such as the battery cell module are connected with the embedded nuts of the lower box body through the screw rods, so that the components can be assembled, and the battery cell module has the advantages of simple structure and convenience in assembly.

In this embodiment, the first layer 31 is disposed towards the accommodating cavity 21 defined by the outer frame 10 and the bottom plate 20, the first layer 31 has a through hole penetrating the accommodating cavity, and the pre-embedded connection member 40 penetrates the through hole and extends into the middle layer 32. By adopting the structure, when the foamed aluminum sandwich board 30 is foamed and molded, the embedded connecting piece 40 can be synchronously fixed, the firmness of the embedded connecting piece 40 can be realized, and the connection sealing performance of the embedded connecting piece 40 and the foamed aluminum sandwich board 30 can be ensured.

It should be noted that, the first layer 31 is disposed toward the accommodating cavity 21 defined by the outer frame 10 and the bottom plate 20, which means that the side wall of the first layer 31 and the upper surface of the bottom plate 20 together form the cavity wall of the accommodating cavity 21, and the side wall of the second layer 33 and the lower surface of the bottom plate 20 together form the outer wall of the lower box.

Specifically, the manufacturing of the foamed aluminum sandwich panel 30 mainly comprises three steps of material presetting, sintering in a sintering furnace and foaming. Firstly, the foaming agent and the aluminum powder are placed between the two layers of the aluminum plates of the first layer 31 and the second layer 33, the through holes are formed in the first layer 31, the embedded connecting pieces 40 penetrate into the through holes, then the workpiece is placed into a high-temperature furnace for sintering, foaming and forming, and after foaming is completed, the limiting tool is moved out, so that the foamed aluminum sandwich plate 30 can be manufactured.

As shown in fig. 2, the embedded connector 40 includes an insertion section 41 and a limiting section 42 connected to each other, the cross-sectional dimension of the limiting section 42 is larger than that of the insertion section 41, the insertion section 41 penetrates through the through hole and extends into the middle layer 32, and the limiting section 42 is located outside the foamed aluminum sandwich panel 30 and is erected on the first layer 31. The length of the embedded connector 40 extending into the middle layer 32 can be limited by the limiting section 42.

In this embodiment, the insertion section 41 is a straight rod section of the nut block, and the limiting section 42 is a nut block of the nut block, and the nut block has a threaded hole penetrating through the straight rod section and the nut block.

As shown in fig. 1, the lower box body includes a plurality of pre-buried connectors 40, and the plurality of pre-buried connectors 40 are disposed on the bottom plate 20 and spaced apart from each other in the circumferential direction of the bottom plate 20. Through setting up a plurality of pre-buried connecting pieces 40, be convenient for with parts such as electric core module and lower box body coupling, the assembly flexibility is higher, and the assembly fastness is higher.

As shown in fig. 1, the lower box further includes a middle beam 50, and the middle beam 50 is located in the accommodating cavity 21 defined by the outer frame 10 and the bottom plate 20. Utilize centre sill 50 can be separated holding chamber 21 for a plurality of sub-cavitys, can assemble parts such as electric core module to the sub-cavity in.

The intermediate beam 50 includes a cross beam and a longitudinal beam. In the present embodiment, the intermediate beam 50 is a cross beam that extends in the width direction of the lower box body.

Specifically, both ends of the middle beam 50 are welded to the outer frame 10, and the lower surface of the middle beam 50 is welded to the upper surface of the bottom plate 20, which has the advantage of high connection strength.

As shown in fig. 1, the outer frame 10 includes a plurality of frames 11, the plurality of frames 11 are disposed in one-to-one correspondence with a plurality of sides of the bottom plate 20, and the plurality of frames 11 are welded and connected in sequence to form a sealed cavity. That is, each side of the bottom plate 20 is disposed corresponding to one of the frames 11. The plurality of frames 11 are made of foamed aluminum sandwich panels 30.

In the present embodiment, the porosity of the intermediate layer 32 is between 63% and 93%. The higher controllable porosity of the foamed aluminum is between 63% and 93%, and the difference is thatThe porosity has different functions on heat preservation, mechanical property and light weight, and the optimization space of the design property is huge. When the foamed aluminum with the porosity of 84% is deformed by 50%, 2.5MJ/m can be absorbed ³ The above energy.

In the present embodiment, the plurality of frames 11 are welded by arc welding, the outer frame 10 and the bottom plate 20 are welded by arc welding, the intermediate beam 50 and the outer frame 10 are welded by arc welding, and the intermediate beam 50 and the bottom plate 20 are welded by arc welding.

The utility model discloses another embodiment provides a battery package, and this battery package includes the lower box that the aforesaid provided. Therefore, the battery pack can also reduce the weight of the lower box body, and the lower box body can meet the use requirement in the aspect of light weight. And, because the outer frame 10 is welded with the bottom plate 20, the lower case has good structural strength.

The device provided by the embodiment has the following beneficial effects:

(1) the foamed aluminum sandwich plate 30 is used as the main material of the lower box body, so that the lower box body is light, and the density of the foamed aluminum is 0.1-0.4 times of that of metal aluminum and is lighter than that of the existing aluminum profile box body;

(2) the foamed aluminum sandwich plate 30 is used as a main material of the lower box body and is connected with foamed aluminum parts in a welding mode, and the mechanical property of the foamed aluminum sandwich plate is stronger than that of an aluminum profile box body;

(3) the foamed aluminum sandwich plate 30 is used as a main material of the lower box body, and is connected with foamed aluminum parts in a welding mode, the lower box body has excellent specific rigidity, the bending specific rigidity of the lower box body is 1.5 times that of steel, and the damping performance of the lower box body is 5 to 10 times that of metal aluminum in the aspects of high damping and shock absorption performance and impact energy absorption rate;

(4) the foamed aluminum sandwich board 30 is used as a main material of the lower box body, so that the foamed aluminum sandwich board has excellent thermal performance, the heat insulation is outstanding when the foamed aluminum sandwich board is in a closed-cell foam structure, and the foamed aluminum with through holes has good heat dissipation performance under the convection condition;

(5) the foamed aluminum sandwich board 30 is used as a main material of the lower box body, the fireproof grade of the foamed aluminum box body is A1 grade, the foamed aluminum box body is 100 percent flame retardant, the foamed aluminum box body is not deformed at 780 ℃, and the foamed aluminum box body is baked for 1 hour at 1000 ℃ to keep the structure complete; the time for passengers to escape can be effectively prolonged when the battery pack system is out of control due to heat.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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

1. The utility model provides a lower box, its characterized in that, lower box includes frame (10) and bottom plate (20), frame (10) enclose to be established the border department of bottom plate (20), frame (10) with bottom plate (20) all adopt foamed aluminum battenboard (30) to make, foamed aluminum battenboard (30) include first layer (31), intermediate level (32) and second layer (33) that set gradually along its thickness direction, first layer (31) with second layer (33) all adopt aluminum plate to make, intermediate level (32) adopt foamed aluminum to make, frame (10) with bottom plate (20) welded connection.

2. The lower box body according to claim 1, further comprising a pre-buried connecting member (40), wherein the pre-buried connecting member (40) is embedded in the outer frame (10) and/or the bottom plate (20).

3. The lower box according to claim 2, characterized in that said pre-buried connection (40) comprises a pre-buried nut.

4. The lower box body according to claim 2, wherein the first layer (31) is arranged towards an accommodating cavity (21) which is defined by the outer frame (10) and the bottom plate (20) together, the first layer (31) is provided with a through hole which penetrates through the first layer, and the embedded connecting piece (40) penetrates through the through hole and extends into the middle layer (32).

5. The lower box body according to claim 4, wherein the embedded connecting piece (40) comprises an inserting section (41) and a limiting section (42) which are connected with each other, the cross section size of the limiting section (42) is larger than that of the inserting section (41), the inserting section (41) penetrates through the through hole and extends into the middle layer (32), and the limiting section (42) is located on the outer side of the foamed aluminum sandwich plate (30) and is erected on the first layer (31).

6. The lower box body according to claim 2, characterized in that the lower box body comprises a plurality of the pre-buried connecting pieces (40), and the plurality of the pre-buried connecting pieces (40) are arranged on the bottom plate (20) and are arranged at intervals along the circumferential direction of the bottom plate (20).

7. The lower box according to any one of claims 1 to 6, characterized in that it further comprises a middle beam (50), said middle beam (50) being located in a receiving cavity (21) enclosed by said outer frame (10) and said bottom plate (20) together.

8. The lower box body as claimed in claim 7, wherein both ends of the middle beam (50) are welded to the outer frame (10), and the lower surface of the middle beam (50) is welded to the upper surface of the bottom plate (20).

9. The lower case according to any one of claims 1 to 6,

the outer frame (10) comprises a plurality of frames (11), the frames (11) are arranged in one-to-one correspondence with the sides of the bottom plate (20), and the frames (11) are sequentially welded and connected; and/or the presence of a gas in the atmosphere,

the porosity of the intermediate layer (32) is between 63% and 93%.

10. A battery pack characterized by comprising the lower case of any one of claims 1 to 9.