CN211265554U

CN211265554U - Shell structure of battery module

Info

Publication number: CN211265554U
Application number: CN201922098368.7U
Authority: CN
Inventors: 鲁恒飞; 刘浩; 许邦南; 林志宏
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-14
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a shell structure of battery module, include: the shell comprises an upper wall, a bottom wall and two opposite side walls, and the side walls are respectively connected with the upper wall and the bottom wall to enclose the upper wall and the bottom wall; the liquid cooling mechanism is arranged in the shell and is parallel to the side wall, and the shell is divided into two containing cavities; the shell and the liquid cooling mechanism are of an integrally formed structure. The utility model provides a casing and liquid cooling mechanism extrusion structure as an organic whole have avoided the appearance of welding seam, and the casing has saved battery system rearrangement liquid cooling device from taking liquid cooling mechanism, and thermal management efficiency is high, has saved space utilization.

Description

Shell structure of battery module

Technical Field

The utility model belongs to the technical field of the battery, concretely relates to shell structure of battery module.

Background

The production process and manufacture of the battery module, which is the smallest unit in the battery system of the electric vehicle, are increasingly moving toward standardization and integration. At present, both host computer factories and battery factories have developed standard 355, 390 and 590 length-size standard battery modules, wherein 590 standard battery modules are a standard battery module form of a passenger car which is very well seen by the host computer factories, especially by foreign vehicle enterprises.

Generally, the larger the battery module is designed, the more cells are integrated, and the less the cost per watt-hour is distributed. 590 battery modules can integrate 24 laminate polymer cells, and 355 and 390 battery modules that only integrate 12 cells have a cost advantage compared.

However, the strength requirement of the 590 soft package battery module on the shell is very high due to the large size and weight. Fig. 1 shows a schematic structural diagram of a conventional 590 soft-package battery module, which is formed by welding an upper casing 101 and a lower casing 102, and on one hand, the structure cannot be arranged inside the battery module, so that the interface size is too large and the battery module cannot be sequentially formed by extrusion; on the other hand, because the two sides of the upper shell 101 and the lower shell 102 are welded to generate the intermittent weld seam 103, when the structure receives the action of about expansion of the internal battery core or external extrusion, the weld seam 103 is directly stressed, the risk of connection failure of the weld seam 103 exists, the structural strength and the expansion resistance are poor, and in addition, the number of the weld seams 103 is large, and the manufacturing cost is increased. More importantly, as shown in fig. 2 and 3, the inside electric core of this kind of traditional 590 battery module is vertical piles up (laminate polymer core 100 is perpendicular with lower casing 102), and the bottom of battery module casing is the cooling surface, and the inside liquid cooling device that does not contain of casing, and the liquid cooling of whole car need arrange the liquid cooling board alone and arrange the battery below in and carry out the thermal management, and inefficiency and effect are not good.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses it is necessary to provide a shell structure of battery module, the inside liquid cooling mechanism that is equipped with of casing, casing and liquid cooling mechanism extrusion structure as an organic whole have avoided the appearance of welding seam, and the casing has liquid cooling mechanism certainly, has saved battery system and has rearranged the liquid cooling device, has solved current shell structure and has had the welding seam many, need arrange the technical problem of liquid cooling device alone.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a housing structure of a battery module, comprising:

the shell comprises an upper wall, a bottom wall and two opposite side walls, and the side walls are respectively connected with the upper wall and the bottom wall to enclose the upper wall and the bottom wall;

the liquid cooling mechanism is arranged in the shell and is parallel to the side wall, and the shell is divided into two containing cavities;

the shell and the liquid cooling mechanism are of an integrally formed structure.

Further, the liquid cooling mechanism is a liquid cooling plate.

Furthermore, a plurality of liquid flow channels are arranged in the liquid cooling plate, the liquid cooling plate further comprises a liquid inlet connector and a liquid outlet connector, and the liquid inlet connector and the liquid outlet connector are respectively communicated with the liquid flow channels.

Furthermore, the liquid flow channel is of a multiple-zigzag structure.

Further, the shell and the liquid cooling mechanism are made of aluminum alloy materials.

Compare with current battery module casing, the utility model provides an among the shell structure, casing and liquid cooling mechanism integrated into one piece have avoided the appearance of welding seam, have guaranteed the structural strength and the anti expansibility of casing. The shell structure is provided with the liquid cooling mechanism, heat management can be simultaneously carried out on 24 soft package battery cores, the heat management mode efficiency is higher, the cost is lower, the space utilization rate is better, and the space of a battery pack of a battery system can be saved.

Drawings

Fig. 1 is a schematic structural diagram of a conventional casing of a 590 battery module;

fig. 2 is a schematic structural diagram of the case in fig. 1 after the case is loaded with a soft-package battery cell;

fig. 3 is a schematic side end structure view of the soft-package battery cell in fig. 2;

fig. 4 is a schematic view of a housing structure of a battery module according to a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram of the internal structure of the liquid cooling mechanism of FIG. 4;

fig. 6 is a schematic structural diagram of the case structure in fig. 4 after the soft-package battery cell 100 is loaded;

fig. 7 is a schematic side end view of fig. 6.

In the figure: 100-soft package battery core, 101-upper shell, 102-lower shell, 103-welding line;

201-upper wall, 202-bottom wall, 203-side wall, 204-liquid cooling plate, 205-liquid flow channel, 206-liquid inlet connection, 207-liquid outlet connection.

Detailed Description

To facilitate an understanding of the present invention, the present invention will be described more fully hereinafter with reference to specific embodiments. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 4, a housing structure of a battery module includes a housing and a liquid cooling mechanism.

Specifically, the housing includes an upper wall 201, a bottom wall 202 and two opposite side walls 203, the side walls 203 are respectively connected with the upper wall 201 and the bottom wall 202, and they jointly enclose to form the housing, and as shown in fig. 4, the whole housing structure is a rectangular parallelepiped structure.

Referring to fig. 4, in the present embodiment, the liquid cooling mechanism is a liquid cooling plate 204, which is disposed inside the housing, the liquid cooling plate 204 is connected to the upper wall 201 and the bottom wall 202, and is parallel to the side wall 203, and the liquid cooling plate 204 divides the housing into two accommodating cavities, where the accommodating cavities are used for loading the flexible package battery cells 100.

More specifically, as shown in fig. 5, a liquid flow passage 205 is provided inside the liquid cooling plate 204, and the liquid flow passage 205 is used for circulating a cooling liquid, so as to perform thermal management on the flexible package battery core 100. In the present embodiment, the liquid channel 205 is a multi-zigzag channel, which can significantly improve the cooling or heating efficiency. Referring to fig. 6, the liquid cooling plate 204 further includes a liquid inlet connector 206 and a liquid outlet connector 207, the liquid inlet connector 206 and the liquid outlet connector 207 are respectively communicated with the liquid flow channel 205, and the liquid inlet connector 206 and the liquid outlet connector 207 are respectively connected to a cooling liquid inlet pipe and a cooling liquid outlet pipe, so as to implement thermal management of the liquid cooling plate 204 on the soft package battery core 100. It is understood that the positions of the liquid inlet connector 206 and the liquid outlet connector 207 are not limited to specific positions, and may be disposed at the same end of the liquid cooling plate 204 or at different ends of the liquid cooling plate 204, respectively, and the circuit design of the liquid flow channel 205 may be adjusted according to the liquid inlet connector 206 and the liquid outlet connector 207, which are conventional operations known to those skilled in the art, and therefore, will not be described in detail herein.

More specifically, in the present embodiment, as shown in fig. 4, the housing and the liquid cooling mechanism are integrally formed of an aluminum alloy, and the aluminum bar is extruded by an extrusion device in one step.

During specific use, as shown in fig. 6 and fig. 7, 24 soft-packaged electrical core 100 all divide in two and hold the intracavity, every holds intracavity and loads 12 soft-packaged electrical core 100, and soft-packaged electrical core 100 is transverse arrangement (with diapire 202 parallel arrangement), set up heat conduction structure glue and the reliable contact of liquid cooling board 204 at the side of soft-packaged electrical core 100, in other words, the side of relieving at soft-packaged electrical core 100 and liquid cooling board 204 is equipped with heat conduction structure glue, make liquid cooling board 204 carry out the thermal management to 24 soft-packaged electrical core 100 simultaneously, efficient and owing to need not additionally set up liquid cooling mechanism, the space of battery system has been practiced thrift, space utilization is good, and the cost is lower.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A housing structure of a battery module, comprising:

the shell comprises an upper wall, a bottom wall and two opposite side walls, wherein the side walls are respectively connected with the upper wall and the bottom wall to enclose the upper wall and the bottom wall;

2. The housing structure of battery modules according to claim 1, wherein the liquid cooling mechanism is a liquid cooling plate.

3. The battery module casing structure of claim 2, wherein the liquid cooling plate has a plurality of liquid flow channels therein, and further comprises a liquid inlet connector and a liquid outlet connector, and the liquid inlet connector and the liquid outlet connector are respectively communicated with the liquid flow channels.

4. The battery module casing structure of claim 3, wherein the liquid flow channel has a multiple zigzag structure.

5. The housing structure of a battery module according to claim 1, wherein the housing and the liquid cooling mechanism are made of an aluminum alloy.