CN216085134U

CN216085134U - Battery pack with double-layer module structure

Info

Publication number: CN216085134U
Application number: CN202121326074.6U
Authority: CN
Inventors: 钱昊; 刘洪权
Original assignee: Wuhan Dongbo Smart New Energy Technology Co ltd
Current assignee: Dongbo New Energy Technology Co.,Ltd.
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-03-18
Anticipated expiration: 2031-06-15

Abstract

The utility model provides a battery pack with a double-layer module structure, which comprises an upper box cover, a lower box body, an upper module and a lower module, wherein the lower box body is provided with a containing cavity with an opening at the top, a cross beam is fixedly welded at the bottom of the containing cavity, the lower module is detachably fixed on the cross beam, a supporting frame structure is vertically welded on the periphery of the containing cavity where the lower module is positioned, a combined frame structure is detachably arranged at the top end of the supporting frame structure, the upper module is detachably fixed on the combined frame structure, the upper box cover and the lower box body are fastened through screws, and the upper module is accommodated in the upper box cover. The utility model can realize the graded assembly of the double-layer module, the double-layer arrangement of the module can effectively reduce the whole weight and volume, improve the energy density, and improve the assembly efficiency of the battery module by graded assembly, and meanwhile, the combined frame structure is detachably connected with the supporting frame structure, thereby avoiding excessive welding process and reducing the welding deformation risk of the box body.

Description

Battery pack with double-layer module structure

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack with a double-layer module structure.

Background

The power battery system is used as an energy storage and power output device of the electric vehicle, is a power source of the electric vehicle, guarantees the cruising ability of the electric vehicle, and along with the vigorous development of the new energy industry, the state puts forward higher requirements on the energy density, the grouping efficiency and the like of the battery system in the face of increasing battery module requirements. At present, power battery systems on the market often adopt a scheme that battery packs of two single-layer modules are stacked for requirements of high energy density and high space utilization rate, so that the installation space of the upper-layer modules is inevitably increased, and the size of a box body is increased. The existing double-layer module structure has the following disadvantages: 1. the box body has more welding parts, so that the box body has deformation risk in the process; 2. the support beam on the box body is a welding part, so the box body has no detachability, and has poor universality and maintainability; 3. the assembly process is complex and does not have the function of grading assembly.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a battery pack with a double-layer module structure, which can solve the problems that the battery pack with the double-layer module structure in the prior art is convenient to assemble and disassemble, the space utilization rate of a box body is low, and the energy density of a power battery system is not high.

The technical scheme of the utility model is realized as follows: the utility model provides a battery pack with a double-layer module structure, which comprises an upper box cover, a lower box body, an upper module and a lower module, wherein the lower box body is provided with a containing cavity with an opening at the top, a cross beam is fixedly arranged at the bottom of the containing cavity, the lower module is detachably fixed on the cross beam, a supporting frame structure is vertically arranged around the containing cavity where the lower module is arranged, a combined frame structure is detachably arranged at the top end of the supporting frame structure, the upper module is detachably fixed on the combined frame structure, the upper box cover covers the lower box body, and the upper module is accommodated in the upper box cover.

On the basis of the above technical scheme, preferably, the support frame structure includes four first support beams, four the first support beams are respectively vertically arranged at four corners of the accommodating chamber.

Further, it is preferable that the combined frame structure includes two long structural beams and two short structural beams, wherein two ends of the two long structural beams are connected through one short structural beam respectively, and two ends of the long structural beam are connected with the tops of the two first support beams in the length direction of the accommodating chamber respectively.

The supporting frame structure further comprises two second supporting beams, the two second supporting beams are vertically arranged on the side wall where the accommodating chamber is located in the length direction respectively, the two second supporting beams are symmetrically arranged relative to the central longitudinal section of the lower box body, and the cross beam is fixedly arranged at the bottom of the accommodating chamber where the two adjacent first supporting beams and the two second supporting beams are located.

Further, preferably, the first supporting beam and the second supporting beam are both in a zigzag structure, and the first supporting beam and the second supporting beam are welded with the accommodating chamber into a whole.

Further, preferably, the combined frame structure further comprises a reinforcing beam, the reinforcing beam is connected between the two long cross beams, and the distance between the reinforcing beam and the short structural beam is equal to the distance between the two adjacent first supporting beams and the second supporting beam.

Further, preferably, the long structural beam is of a zigzag structure, the short structural beam and the reinforcing beam are of a door-shaped structure, notches matched with the long structural beam are respectively arranged at two ends of the short structural beam and the reinforcing beam, the end portions of the short structural beam and the reinforcing beam are respectively connected with the top portion of the long structural beam through bolts, two ends of the long structural beam are respectively located at the top portions of the first supporting beam and the second supporting beam, the end portion of the short structural beam is inserted into the first supporting beam, the end portion of the reinforcing beam is inserted into the second supporting beam, and the short structural beam and the first supporting beam, the reinforcing beam and the second supporting beam are respectively connected through bolts.

Preferably, the upper layer module and the lower layer module are formed by linearly arranging a plurality of battery pack modules with the same number.

Preferably, the bottom of battery package module is provided with the installation department with crossbeam and long structural beam looks adaptation, and all sets up the bolt hole that corresponds with the installation department position on crossbeam and the long structural beam.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model discloses a battery pack with a double-layer module structure, which is characterized in that a beam is arranged at the bottom of an accommodating chamber where a lower box body is arranged, the lower layer module can be conveniently and detachably arranged in the lower box body, and the supporting frame structure is vertically arranged in the containing cavity in which the periphery of the lower layer module is positioned, after the lower module is installed in the lower box body, the assembled combined frame structure is installed at the top of the supporting frame structure, then the upper layer module is arranged on the top of the combined frame structure, and finally the upper box cover is connected with the lower box body, thereby realizing the graded assembly of the double-layer module, the double-layer arrangement of the module, effectively reducing the whole weight and volume, improving the energy density, improving the assembly efficiency of the battery module by the graded assembly, meanwhile, the combined frame structure is detachably connected with the supporting frame structure, so that excessive welding processes are avoided, and the welding deformation risk of the box body is reduced.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of a battery pack having a double-layered module structure according to the present disclosure;

FIG. 2 is a schematic view of the assembly structure of the lower case and the combined frame structure disclosed by the present invention;

FIG. 3 is an exploded view of the lower box and the assembled frame structure of the present invention;

fig. 4 is a partially enlarged view of a portion a in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 and shown in fig. 2, an embodiment of the present invention discloses a battery pack with a dual-layer module structure, which includes an upper case cover 1, a lower case 2, an upper module 3 and a lower module 4, wherein the lower case 2 has a containing chamber 21 with an open top, a cross beam 22 is fixedly disposed at the bottom of the containing chamber 21, the lower module 4 is detachably fixed on the cross beam 22, a supporting frame structure 5 is vertically disposed in the periphery of the containing chamber 21 where the lower module 4 is disposed, a combined frame structure 6 is detachably disposed at the top end of the supporting frame structure 5, the upper module 3 is detachably fixed on the combined frame structure 6, the upper case cover 1 covers the lower case 2 and is locked by bolts, and the upper module 3 is accommodated in the upper case cover 1.

Adopt above-mentioned technical scheme, set up crossbeam 22 through the chamber 21 bottom that holds at box 2 place down, can make things convenient for lower floor's module 4 demountable installation in box 2 down, through the vertical braced frame structure 5 that sets up in the chamber 21 that holds at 4 outer circumferences of lower floor's module place, can install lower floor's module 4 back in box 2 down, install the combination frame structure 6 that the equipment was accomplished at braced frame structure 5 top, then install upper module 3 at combination frame structure 6 top, at last will go up case lid 1 and be connected with lower box 2, thereby realize the hierarchical assembly of double-deck module. The module is arranged in a double-layer manner, so that the overall weight and volume are effectively reduced, and the energy density is improved; hierarchical assembly has improved battery module's assembly efficiency, and combination frame structure 6 can be dismantled with braced frame structure 5 and be connected simultaneously, avoids too much welding process for box welding deformation risk reduces.

As some embodiments, referring to fig. 3 and 4, the support frame structure 5 includes four first support beams 51, and the four first support beams 51 are respectively vertically disposed at four corners of the receiving chamber 21. Specifically, the first support beam 51 is located at the end of the cross beam 22, so that the lower module 4 is placed in the accommodating chamber 21 and fixed by the cross beam 22, and the support frame is located outside the lower module 4, in this embodiment, the height of the first support beam 51 is greater than the thickness of the lower module 4.

In this embodiment, the combined frame structure 6 is used to be installed on top of the supporting frame structure 5, specifically, the combined frame structure 6 includes two long structural beams 61 and two short structural beams 62, wherein two ends of the two long structural beams 61 are respectively connected by one short structural beam 62, and two ends of the long structural beam 61 are respectively connected with two tops of the first supporting beams 51 in the length direction of the accommodating chamber 21. With such a structural arrangement, two long structural beams 61 and two short structural beams 62 are interconnected to form a combined frame structure 6, which is thereby placed on top of the support frame structure 5 and detachably connected to the support frame structure 5.

Because the upper module 3 is fixedly connected with the combined frame structure 6, in order to enable the combined frame structure 6 to bear the load of the upper module 3, the utility model is further improved as follows, specifically, the supporting frame structure 5 further comprises two second supporting beams 52, the two second supporting beams 52 are respectively vertically arranged on the side wall of the containing chamber 21 in the length direction, the two second supporting beams 52 are symmetrically arranged relative to the central longitudinal section of the lower box body 2, and the cross beam 22 is fixedly arranged at the bottom of the containing chamber 21 between the two adjacent first supporting beams 51 and the second supporting beams 52. Therefore, the two ends of the two long structural beams 61 are respectively placed on the first supporting beams 51, and the middle parts of the long structural beams 61 can be supported by the second supporting beams 52, so that the long structural beams 61 are not pressed and deformed after the lower module 4 is placed on the combined frame structure 6.

In the above embodiment, the first support beam 51 and the second support beam 52 are each in a zigzag configuration, and the first support beam 51 and the second support beam 52 are each welded to the inner wall of the accommodating chamber 21. Therefore, by adopting the structure, the first support beam 51 and the second support beam 52 have light structures, and the first support beam 51 and the second support beam 52 are convenient to detach and connect with the lower box body 2.

In order to improve the stability of the combined frame structure 6, the combined frame structure 6 of the present invention further comprises a reinforcing beam 63, wherein the reinforcing beam 63 is connected between the two long cross beams 22, and the distance between the reinforcing beam 63 and the short structural beam 62 is equal to the distance between the two adjacent first supporting beams 51 and the second supporting beam 52. Thus, after the reinforcing beam 63 is connected to the long structural beam 61, the reinforcing beam 63 is just aligned with the second support beam 52, which facilitates the connection of the reinforcing beam 63 to the second support beam 52.

In order to realize the assembly of the combined frame structure 6 and the supporting frame structure, the scheme adopted by the implementation is as follows: the long structural beam 61 is of a structure shaped like a Chinese character 'ji', the short structural beam 62 and the reinforcing beam 63 are of a door-shaped structure, notches matched with the long structural beam 61 are respectively arranged at two ends of the short structural beam 62 and the reinforcing beam 63, and the end parts of the short structural beam 62 and the reinforcing beam 63 are respectively connected with the top part of the long structural beam 61 through bolts. Thereby, the assembly of the composite frame structure 6 can be achieved. The both ends of long structure roof beam 61 are located first supporting beam 51, second supporting beam 52 top respectively, from this, after the equipment of composite frame structure 6 is accomplished, place composite frame structure 6 at the supporting frame structure top, the tip of short structure roof beam 62 is pegged graft in first supporting beam 51, the tip of stiffening beam 63 is pegged graft in second supporting beam 52, be connected through the bolt between short structure roof beam 62 and first supporting beam 51, stiffening beam 63 and the second supporting beam 52 respectively, and then realize that composite frame structure 6 is connected with the supporting frame structure.

In this embodiment, the upper module 3 and the lower module 4 are formed by linearly arranging a plurality of battery pack modules equal in number. The bottom of battery package module is provided with the installation department (not shown in the figure) with crossbeam 22 and long structural beam 61 looks adaptation, and is specific, this installation department be the boss, can carry out the adaptation with crossbeam and long structural beam, and all set up the bolt hole that corresponds with the installation department position on crossbeam 22 and the long structural beam 61. Therefore, the upper module 3 and the lower module 4 can be assembled in a grading way conveniently.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a battery package with double-deck module structure, includes case lid (1), lower box (2), upper module (3) and lower floor's module (4), its characterized in that: box (2) has open-top's chamber (21) that holds down, hold fixed crossbeam (22) that is provided with in chamber (21) bottom, lower floor's module (4) can be dismantled and fix on crossbeam (22), the chamber (21) that holds at lower floor's module (4) place is vertical all around and is provided with braced frame structure (5), braced frame structure's (5) top can be dismantled and is provided with built-up frame structure (6), upper module (3) can be dismantled and fix on built-up frame structure (6), goes up case lid (1) lid and closes and fix on box (2) down, and upper module (3) hold in go up in case lid (1).

2. The battery pack having a double-layered module structure as set forth in claim 1, wherein: the supporting frame structure (5) comprises four first supporting beams (51), and the four first supporting beams (51) are respectively vertically arranged at four corners of the accommodating chamber (21).

3. The battery pack having a double-layered module structure as set forth in claim 2, wherein: the combined frame structure (6) comprises two long structural beams (61) and two short structural beams (62), wherein two ends of the two long structural beams (61) are connected through one short structural beam (62), and two ends of the long structural beam (61) are connected with the tops of two first supporting beams (51) in the length direction of the accommodating chamber (21) respectively.

4. The battery pack having a double-layered module structure according to claim 3, wherein: the supporting frame structure (5) further comprises two second supporting beams (52), the two second supporting beams (52) are respectively vertically arranged on the side wall where the accommodating chamber (21) is located in the length direction, the two second supporting beams (52) are symmetrically arranged relative to the central longitudinal section of the lower box body (2), and the cross beam (22) is fixedly arranged at the bottom of the accommodating chamber (21) where the two adjacent first supporting beams (51) and the second supporting beams (52) are located.

5. The battery pack having a double-layered module structure according to claim 4, wherein: the first supporting beam (51) and the second supporting beam (52) are both in a structure like a Chinese character 'ji', and the first supporting beam (51) and the second supporting beam (52) are welded with the accommodating chamber (21) into a whole.

6. The battery pack having a double-layered module structure according to claim 5, wherein: the combined frame structure (6) further comprises a reinforcing beam (63), the reinforcing beam (63) is connected between the two long structural beams (61), and the distance between the reinforcing beam (63) and the short structural beam (62) is equal to the distance between the two adjacent first supporting beams (51) and the second supporting beam (52).

7. The battery pack having a double-layered module structure according to claim 4, wherein: the long structural beam (61) is of a structure in a shape like a Chinese character 'ji', the short structural beam (62) and the reinforcing beam (63) are of a door-shaped structure, notches matched with the long structural beam (61) are formed in the two ends of the short structural beam (62) and the reinforcing beam (63), the end portions of the short structural beam (62) and the reinforcing beam (63) are connected with the top portion of the long structural beam (61) through bolts respectively, the two ends of the long structural beam (61) are located at the top portions of the first supporting beam (51) and the second supporting beam (52) respectively, the end portion of the short structural beam (62) is inserted into the first supporting beam (51), the end portion of the reinforcing beam (63) is inserted into the second supporting beam (52), and the short structural beam (62) is connected with the first supporting beam (51), the reinforcing beam (63) and the second supporting beam (52) through bolts respectively.

8. The battery pack having a double-layered module structure according to claim 3, wherein: the upper-layer module (3) and the lower-layer module (4) are formed by linearly arranging a plurality of battery pack modules with equal number.

9. The battery pack having a double-layered module structure according to claim 8, wherein: the bottom of battery package module is provided with the installation department with crossbeam (22) and long structural beam (61) looks adaptation, and all sets up the bolt hole that corresponds with the installation department position on crossbeam (22) and long structural beam (61).