CN216928776U

CN216928776U - Box body assembly and battery pack with same

Info

Publication number: CN216928776U
Application number: CN202123430177.XU
Authority: CN
Inventors: 张波; 花黄伟; 贺月辉
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-08
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a box assembly and a battery pack with the same. The box subassembly includes: the box body comprises a bottom wall and a circumferential side wall extending upwards from the bottom wall, and a liquid inlet and a liquid outlet are formed in the circumferential side wall; the liquid cooling pipeline is bent and formed on the bottom wall, two ends of the liquid cooling pipeline are connected between the liquid inlet and the liquid outlet, and the upper surface or the lower surface of the liquid cooling pipeline is provided with an open structure; and the sealing plate is connected with the bottom wall and is blocked at the open structure. By applying the technical scheme of the utility model, the problems of high height and heavy weight of the box body assembly in the prior art can be solved.

Description

Box body assembly and battery pack with same

Technical Field

The utility model relates to the technical field of power batteries, in particular to a box assembly and a battery pack with the same.

Background

The battery pack is a power source of the electric automobile, the lower box body is the largest and heaviest structural part in the battery pack, and along with the fact that the endurance mileage expected by people for the electric automobile is higher and higher, the lower box body of the battery pack also puts forward higher requirements. At present, most of the existing lower box bodies are made of metal materials and are welded to form a box body, and the water cooling system is fixed on the box body in a support mode.

The whole box body not only contains the weight of the water cooling system but also contains the weight of the bracket by the arrangement mode, so that the whole weight of the lower box body is greatly improved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a box body assembly and a battery pack with the same, so as to solve the problem that the weight of the box body assembly is large in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a tank assembly including: the box body comprises a bottom wall and a circumferential side wall extending upwards from the bottom wall, and a liquid inlet and a liquid outlet are formed in the circumferential side wall; the liquid cooling pipeline is bent and formed on the bottom wall, two ends of the liquid cooling pipeline are connected between the liquid inlet and the liquid outlet, and the upper surface or the lower surface of the liquid cooling pipeline is provided with an open structure; and the sealing plate is connected with the bottom wall and is blocked at the open structure.

Further, the bottom wall is the liquid containing groove arranged on the inner side of the circumferential side wall, the liquid cooling pipeline is formed on the inner wall surface of the liquid containing groove in a bending mode, and the sealing plate is connected with the outer surface of the liquid containing groove.

Further, open structure sets up upwards, and the top at the liquid cooling pipeline is established to the sealed plate lid.

Further, the box subassembly still includes the guard plate of being connected with the diapire of box body, and the guard plate setting is at the lower surface of diapire.

Further, the box subassembly still includes: the first pipe joint is connected with the liquid inlet; the second pipe joint is connected with the liquid outlet; wherein, threaded connection between first coupling and the inlet, threaded connection between second coupling and the outlet.

Further, the box body assembly further comprises a temperature sensor, and the temperature sensor is arranged on the bottom wall and at a position corresponding to the liquid inlet and/or the liquid outlet.

Further, the box body assembly further comprises a mounting support, the mounting support is connected with the bottom wall in a welding mode, a mounting hole is formed in the mounting support, and the temperature sensor is mounted in the mounting hole.

Furthermore, the box body assembly further comprises a cover body covering the box body, and the box body is connected with the cover body through a fastening piece.

Furthermore, the box body and the liquid cooling pipeline are of an integrally formed structure; the box body is made of aluminum alloy materials, and the sealing plate is made of aluminum magnesium alloy materials; the circumferential side wall is provided with a mounting plate, and the mounting plate is provided with a through hole; the sealing plate is welded with the box body.

According to another aspect of the utility model, a battery pack is provided, which comprises a case assembly and a module arranged in the case assembly, wherein the case assembly is the case assembly.

By applying the technical scheme of the utility model, the liquid cooling pipeline is directly arranged on the bottom wall, and the open structure on the liquid cooling pipeline is sealed by the sealing plate, so that the liquid cooling pipeline does not need to be installed by an installation support, the installation height of the liquid cooling pipeline in the box body is reduced, the weight of the whole box body assembly is reduced, the assembly difficulty is reduced, the internal space of the box body is increased, and the cost is saved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows an exploded schematic view of an embodiment of a case assembly according to the present invention;

FIG. 2 shows a schematic structural view of the tank body and the liquid cooling lines of FIG. 1;

FIG. 3 shows a schematic bottom view of the structure of FIG. 2;

FIG. 4 shows a top view of the case assembly of FIG. 1; and

fig. 5 shows a schematic view of the mounting bracket of fig. 1.

Wherein the figures include the following reference numerals:

10. a box body; 11. a bottom wall; 12. a circumferential sidewall; 13. a liquid inlet; 14. a liquid outlet; 16. mounting a plate; 17. a through hole; 20. a liquid cooling pipeline; 30. a sealing plate; 40. a protection plate; 51. a first pipe joint; 52. a second pipe joint; 60. a temperature sensor; 70. mounting a bracket; 71. and (7) installing holes.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

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 only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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.

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 unless specifically stated otherwise. 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 merely illustrative, and not 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.

As shown in fig. 1 to 3, the present embodiment provides a tank assembly including a tank body 10, a liquid cooling pipe 20, and a sealing plate 30. The box body 10 comprises a bottom wall 11 and a circumferential side wall 12 extending upwards from the bottom wall 11, wherein a liquid inlet 13 and a liquid outlet 14 are arranged on the circumferential side wall 12; the liquid cooling pipeline 20 is bent and formed on the bottom wall 11, two ends of the liquid cooling pipeline 20 are connected between the liquid inlet 13 and the liquid outlet 14, and the upper surface or the lower surface of the liquid cooling pipeline 20 is provided with an open structure; the sealing plate 30 is connected to the bottom wall 11 and is closed off at the open structure.

In this embodiment, because directly form liquid cooling pipeline 20 on diapire 11, and seal up through the uncovered structure of closing plate 30 on to liquid cooling pipeline 20, thereby make liquid cooling pipeline 20 and box body 10 structure as an organic whole, need not through installing support installation liquid cooling pipeline 20, reduced the mounting height of liquid cooling pipeline 20 in box body 10, and then reduced the weight of whole box subassembly, reduced the assembly degree of difficulty, increased box body 10's inner space, practiced thrift the cost.

Preferably, the liquid cooling pipeline 20 and the box body 10 in this embodiment are integrally formed by a casting process, and an open structure is provided on the liquid cooling pipeline 20 for facilitating demolding in the process. The specific structures such as the bending form and the winding direction of the liquid cooling pipeline 20 can be designed according to the requirement of heat management, so that heat management in different areas is realized, and the distributed management and control precision of the heat management is improved.

The tank body 10 and the liquid cooling pipeline 20 are integrally cast and formed by using an aluminum alloy material, such as ADC12, and the sealing plate 30 is made of an aluminum-magnesium alloy material, such as AL 5052.

The sealing plate 30 is welded to the case body 10. In order to ensure a good sealing effect of the sealing plate 30 on the liquid cooling pipeline 20, the sealing plate 30 and the liquid cooling pipeline 20 are connected by friction stir welding to realize the sealing connection between the sealing plate 30 and the liquid cooling pipeline 20.

Preferably, the bottom wall 11 is a liquid containing tank disposed inside the circumferential side wall 12, the liquid cooling pipeline 20 is formed by bending on an inner wall surface of the liquid containing tank, and the sealing plate 30 is connected to an outer surface of the liquid containing tank.

Specifically, the bottom wall 11 is a three-dimensional structure formed on the circumferential side wall 12, the bottom wall 11 forms a U-shaped liquid containing tank connected with the lower portion of the circumferential side wall 12, an opening of the liquid containing tank is hermetically connected with the circumferential side wall 12, and the liquid inlet 13, the liquid outlet 14 and an internal flow passage of the liquid cooling pipeline 20 are communicated with the inside of the liquid containing tank, so that the circulating flow of the cooling liquid inside the tank assembly is realized. The sealing plate 30 is welded to the upper surface of the liquid receiving tank.

As shown in fig. 1 and 4, in the present embodiment, the open structure is disposed upward, and the sealing plate 30 is covered above the liquid cooling pipes 20.

The sealing plate 30 isolates the liquid cooling pipeline 20 from the inner space of the box body 10 while realizing the sealing of the liquid cooling pipeline 20, and when liquid leakage occurs in the liquid cooling pipeline 20, the battery module in the box body 10 is not affected, so that safety accidents are avoided.

As shown in fig. 1, in the present embodiment, the tank assembly further includes a shielding plate 40 connected to the bottom wall 11 of the tank body 10, the shielding plate 40 being disposed on a lower surface of the bottom wall 11.

Through the above arrangement, the protection plate 40 plays a role in protecting the liquid cooling pipeline 20, so that the liquid cooling pipeline 20 is prevented from being impacted externally, and the normal use of the battery pack is ensured.

As shown in fig. 1 and 2, in the present embodiment, the tank assembly further includes a first pipe joint 51 and a second pipe joint 52, the first pipe joint 51 being connected to the liquid inlet 13; second pipe joint 52 is connected with liquid outlet 14; the first pipe joint 51 is in threaded connection with the liquid inlet 13, and the second pipe joint 52 is in threaded connection with the liquid outlet 14.

Through the arrangement, the first pipe joint 51 and the second pipe joint 52 are arranged at the lower part of the box body 10 and positioned at the outer side, so that even if liquid leakage occurs at the first pipe joint or the second pipe joint in the using process, the structure in the box assembly cannot be influenced, and the normal work of the box assembly is further ensured.

As shown in fig. 1 and 4, in the present embodiment, the box assembly further includes a temperature sensor 60, and the temperature sensor 60 is disposed on the bottom wall 11 at a position corresponding to the liquid inlet 13 and the liquid outlet 14.

Specifically, the temperature sensor 60 is disposed corresponding to the liquid inlet 13 and the liquid outlet 14, so as to monitor the temperature of the liquid in the liquid cooling pipeline 20 and ensure a good heat management effect of the liquid cooling pipeline 20.

As shown in fig. 1 and fig. 5, in the present embodiment, the box assembly further includes a mounting bracket 70, the mounting bracket 70 is welded to the bottom wall 11, a mounting hole 71 is formed on the mounting bracket 70, and the temperature sensor 60 is mounted in the mounting hole 71.

The above arrangement ensures the stability of the installation of the temperature sensor 60 on the case body 10.

Further, the box assembly further comprises a cover body covering the box body 10, and the box body 10 is connected with the cover body through a fastener.

Specifically, be equipped with a plurality of erection column on the assembly surface of box body 10 and lid in this embodiment for the wearing to establish of fastener is connected, in order to strengthen the intensity between box body 10 and the erection column and the bulk strength of box body 10, sets up the strengthening rib in the corresponding position of erection column, and whole structure is integrative casting shaping, and the processing of being convenient for, structural strength is good.

As shown in fig. 2 to 4, in the present embodiment, the circumferential side wall 12 is provided with a mounting plate 16, and the mounting plate 16 is provided with a through hole 17.

In this embodiment, there are a plurality of mounting plates 16, the mounting plates 16 are spaced apart in the circumferential direction of the circumferential side wall 12, and the through holes 17 on the mounting plates 16 are used for passing bolts to be fixedly connected with the frame. The mounting plate 16 is integrally cast with the box body 10, so that the structural strength is ensured and the welding cost is reduced.

The embodiment also provides a battery pack, which comprises a box body assembly and a module arranged in the box body assembly, wherein the box body assembly is the box body assembly.

In this embodiment, because directly set up liquid cooling pipeline 20 on diapire 11 to seal up through the uncovered structure of closing plate 30 on to liquid cooling pipeline 20, thereby need not through installing support installation liquid cooling pipeline 20, reduced the mounting height of liquid cooling pipeline 20 in box body 10, and then reduced the weight of whole box subassembly, reduced the assembly degree of difficulty, increased box body 10's inner space, practiced thrift the cost.

Therefore, the battery pack with the box body assembly also has the advantages.

The box body 10 is made of metal, specifically ADC12, and is formed by a die-casting process. The liquid cooling pipeline 20 is arranged at the bottom of the box body 10, the liquid cooling pipeline 20 can realize very complex pipeline design according to heat management requirements on the premise of not increasing cost, different requirements of different regional battery cores on heat management can be realized, and the distributed management and control precision of heat management is improved. Liquid inlet and liquid outlet of business turn over liquid cooling are reserved to side in box body 10 bottom to first coupling 51 of installation and second coupling 52 can realize that the liquid cooling connects and arranges in the bottom half outside, even connect the weeping, liquid can not get into battery package inside yet, thereby has avoided the weeping to the production of battery package to fire the incident of explosion from the source.

Be provided with mounting panel 16 on box body 10, this mounting panel 16 be used for with whole car frame fixed mounting, adopt integrative casting shaping, when guaranteeing structural strength, reduced welded cost. The assembling surface of the box body 10 and the upper cover is provided with a plurality of mounting columns for bolt fixation, and reinforcing ribs are arranged between the mounting columns and the box body for enhancing the strength of the mounting columns of the box body and the overall strength of the box body.

The sealing plate 30 and the protection plate 40 are made of metal materials, and specifically can be Al5052, the sealing plate 30 and the protection plate 40 are simple in structural form, easy to cut and form, the sealing plate 30 is arranged inside the box body 10, the protection plate 40 is arranged outside the box body 10, the sealing plate 30 and the protection plate can be connected in a welding mode, and specifically friction stir welding is adopted, and the main function of the sealing plate is as follows: the sealing plate 30 seals the liquid cooling pipeline 20 to ensure that the liquid cooling pipeline is a sealed space and circularly flows according to a designed flow channel; the protection plate 40 protects the liquid cooling pipe 20 from being damaged by collision, and protects the liquid cooling pipe 20 from being damaged.

The first pipe joint 51 and the second pipe joint 52 are respectively installed on the reserved ports of the lower portion of the case body 10. The main functions are as follows: one joint for realizing the inlet and the outlet of the cooling liquid seals the liquid inlet and the liquid outlet, so that the liquid cooling pipeline 20 is an integrally sealed flow channel, and the circulating flow is carried out according to the designed flow channel.

The temperature sensors 60 are respectively arranged at the liquid inlet and the liquid outlet, so that the temperature of the liquid can be monitored. The temperature sensor 60 is fixed inside the battery pack by a mounting bracket 70, and the mounting bracket 70 and the case are fixed on the case body by welding.

The box body assembly of the embodiment has the following characteristics:

1. the box body and the liquid cooling pipeline are integrated and integrally cast and molded;

2. a sealing plate and a protection plate are welded with the lower box body to form a sealed liquid cooling pipeline;

3. the lower box body and the mounting feet are integrally cast and molded;

4. the corresponding positions of the mounting columns are integrally formed outside the box body in a reinforcing rib mode;

5. the liquid inlet and the liquid outlet are distributed at the lower part of the outer side of the box body;

6. temperature sensors are arranged at the liquid inlet and the liquid outlet.

The technical scheme of the embodiment has the following advantages:

distributed management and control of thermal management is achieved. The liquid cooling pipeline and the box body are integrally cast and formed, so that the realization of the liquid cooling pipeline with a complex shape can be met, different requirements of the battery cores in different areas on heat management can be realized, and the distributed management and control precision of the heat management is improved;

saving cost and reducing weight. The liquid cooling pipeline is integrated on the box body, so that the space in the battery pack is greatly saved, and the cost is greatly saved. A liquid cooling pipeline does not need to be installed in the bag, a mounting frame is omitted, and the weight of the whole bag is obviously improved and reduced;

the energy density is improved. The liquid cooling system is integrated on the lower box body, so that the space in the battery pack is increased, more battery cores can be placed in the battery pack, meanwhile, the weight of the battery pack is reduced, and the energy density of the whole pack is obviously improved;

the safety is improved. Put in the battery package to the joint of current liquid cold tube, in case the problem of weeping appears in joint department, probably because of the short circuit causes the condition of incident such as fire explosion, in order to solve this problem from the root cause, place first coupling and second coupling in the outside of box body lower part to keep apart with battery package inside, even the weeping condition appears, liquid can not get into battery package inside yet.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

because directly set up the liquid cooling pipeline on the diapire to open structure on to the liquid cooling pipeline through the closing plate seals, thereby need not through installing support installation liquid cooling pipeline, reduced the mounting height of liquid cooling pipeline in the box body, and then reduced the weight of whole box subassembly, reduced the assembly degree of difficulty, increased the inner space of box body, practiced thrift the cost.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "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 the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

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

1. A case assembly, comprising:

the box body (10) comprises a bottom wall (11) and a circumferential side wall (12) extending upwards from the bottom wall (11), wherein a liquid inlet (13) and a liquid outlet (14) are formed in the circumferential side wall (12);

the liquid cooling pipeline (20) is bent and formed on the bottom wall (11), two ends of the liquid cooling pipeline (20) are connected between the liquid inlet (13) and the liquid outlet (14), and the upper surface or the lower surface of the liquid cooling pipeline (20) is provided with an opening structure;

and the sealing plate (30) is connected with the bottom wall (11) and is blocked at the open structure.

2. The box body assembly according to claim 1, wherein the bottom wall (11) is a liquid containing tank arranged on the inner side of the circumferential side wall (12), the liquid cooling pipeline (20) is formed on the inner wall surface of the liquid containing tank in a bending mode, and the sealing plate (30) is connected with the outer surface of the liquid containing tank.

3. The cabinet assembly as claimed in claim 1, wherein the open structure is upwardly disposed, and the sealing plate (30) is disposed over the liquid cooling pipes (20).

4. A tank assembly as claimed in claim 1, characterised in that it further comprises a protection plate (40) connected to the bottom wall (11) of the tank body (10), said protection plate (40) being arranged on the lower surface of the bottom wall (11).

5. The cabinet assembly as claimed in claim 1, further comprising:

a first pipe joint (51) connected with the liquid inlet (13);

a second pipe connector (52) connected with the liquid outlet (14);

the first pipe joint (51) is in threaded connection with the liquid inlet (13), and the second pipe joint (52) is in threaded connection with the liquid outlet (14).

6. Tank assembly according to claim 2, characterized in that it further comprises a temperature sensor (60), said temperature sensor (60) being arranged on said bottom wall (11) in correspondence of said inlet port (13) and/or said outlet port (14).

7. The box assembly according to claim 6, further comprising a mounting bracket (70), wherein the mounting bracket (70) is welded to the bottom wall (11), a mounting hole (71) is formed in the mounting bracket (70), and the temperature sensor (60) is mounted in the mounting hole (71).

8. The box assembly according to any one of claims 1 to 7, further comprising a cover covering the box body (10), wherein the box body (10) and the cover are connected by a fastener.

9. The tank assembly according to any one of claims 1 to 7, characterized in that said tank body (10) is of integral structure with said liquid cooling lines (20); the box body (10) is made of an aluminum alloy material, and the sealing plate (30) is made of an aluminum magnesium alloy material; the circumferential side wall (12) is provided with a mounting plate (16), and the mounting plate (16) is provided with a through hole (17); the sealing plate (30) is connected with the box body (10) in a welding mode.

10. A battery pack comprising a case assembly and a module disposed within the case assembly, wherein the case assembly is the case assembly of any one of claims 1 to 9.