CN221080217U - Battery module - Google Patents

Abstract

The utility model relates to a battery module, which belongs to the technical field of new energy batteries and comprises a module shell, a battery core module and a bus bar, wherein the module shell comprises a box body and a box cover which are combined, a containing cavity for containing the battery core module and the bus bar is formed, the bus bar is positioned between the battery core module and the box cover, and a foaming structural adhesive layer is filled between the bus bar and the box cover. According to the battery module, the foaming structural adhesive layer is filled between the busbar and the case cover at the top of the battery module, so that the local stress received by the case cover at the top of the battery module can be dispersed and released by utilizing the characteristic that the foaming structural adhesive layer has compact pores, and the energy generated by collision between the battery module and the case cover can be absorbed by pore shrinkage, so that the problem that the battery module is damaged when the top of the battery module is excessively deformed due to stress is effectively solved.

Description

Battery module

Technical Field

The utility model relates to the technical field of new energy batteries, in particular to a battery module.

Background

The power battery system is used as a key component for energy storage of the electric automobile, and the safety performance of the power battery system directly influences the whole automobile safety of the electric automobile. In recent years, the development of the new energy industry drives the continuous innovation of battery pack grouping technology, and the requirements of the whole vehicle on mechanical protection and thermal protection of the top of the battery cell pack are also higher and higher. When the top of the battery pack is locally stressed, the upper cover of the battery pack can deform, and when serious, the battery pack can be in sealing failure, and even the battery core body and the high-low voltage loop are damaged, so that adverse effects are caused. Particularly, in recent years, CTP and CTC technologies rise rapidly, so that the distance between the upper cover of the battery pack and the battery cell is smaller and smaller, and the battery cell and the top of the battery pack are more likely to collide, so that the upper cover of the battery pack is damaged or deformed, and the safety protection of the top of the battery pack is urgent.

Disclosure of utility model

1. Problems to be solved

Aiming at the problem that a group of cells in a battery pack are easy to collide with an upper cover of the battery pack so as to damage or deform in the prior art, the utility model provides the battery module.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

A battery module comprises a module housing, a battery cell module, and a bus bar,

The module shell comprises a box body and a box cover which are combined, the box body is provided with an accommodating cavity for accommodating the battery cell module and the busbar, the busbar is positioned between the battery cell module and the box cover, and a foaming structural adhesive layer is filled between the busbar and the box cover.

Further, a framework is arranged between the busbar and the box cover, and the framework is provided with a limiting groove for limiting the busbar and the foaming structural adhesive layer.

Further, the framework comprises limiting rods positioned at the tops of the battery modules and positioned at the two sides of the busbar, and limiting grooves are formed between the limiting rods at the two sides.

Further, the cell module comprises a plurality of cell strings electrically connected with each other, through grooves formed by the frameworks are correspondingly formed at the tops of gaps between two adjacent cell strings, and the through grooves are filled with the foaming structural adhesive layers.

Further, a low-pressure acquisition system which is parallel to the busbar is further arranged in the limiting groove, and the top of the low-pressure acquisition system is also paved with the foaming structural adhesive layer.

Further, the bus bar is welded with the battery core pole in the battery core module, and the bus bar is connected with the low-voltage acquisition system.

Further, the outer side of the box cover is also covered with the foaming structural adhesive layer.

Further, a plurality of grooves are formed in the outer side of the box cover, and the foaming structural adhesive layer is filled in the grooves.

Further, the box body and the box cover are detachably connected.

3. Advantageous effects

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

(1) According to the battery module, the foaming structural adhesive layer is filled between the busbar and the case cover at the top of the battery module, so that the local stress received by the case cover at the top of the battery module can be dispersed and released by utilizing the characteristic that the foaming structural adhesive layer has compact pores, and the energy generated by collision between the battery module and the case cover can be absorbed by pore shrinkage, so that the problem that the battery module is damaged when the top of the battery module is excessively deformed due to stress is effectively solved.

(2) According to the battery module provided by the utility model, the battery core module, the busbar and the case cover can be better connected together through the arrangement of the foaming structural adhesive layer, and the foaming structural adhesive layer also carries out omnibearing protection on the busbar so as to prevent short-circuit accidents in a high-voltage area under extreme conditions.

(3) According to the battery module provided by the utility model, the foam structure adhesive layer is also arranged on the outer side of the case cover, so that the case cover can be further dispersed and released from local stress generated by collision, the case cover is better protected, and the foam structure adhesive layer covering the case cover can also have a good heat preservation effect on the battery cell module.

Drawings

Fig. 1 is a schematic view of a battery module according to an embodiment;

fig. 2 is a schematic structural diagram (a) of a battery cell module in the battery module according to the embodiment;

fig. 3 is a schematic structural diagram of a battery cell module in the battery module according to the embodiment (ii);

Fig. 4 is a schematic structural diagram of a battery cell module in the battery module according to the embodiment (iii);

fig. 5 is a schematic diagram showing the stress of the adhesive layer of the foaming structure in the embodiment.

In the figure:

1. A module housing; 101. a case; 102. a case cover; 103. a groove; 2. a battery cell module; 201. a battery string; 3. a busbar; 4. a foaming structural adhesive layer; 5. a skeleton; 501. a limit rod; 502. a limit groove; 503. a through groove; 6. a low pressure acquisition system.

Detailed Description

The utility model is further described with reference to the following examples in order to facilitate the understanding of the technical means, the creation characteristics, the achievement of the objects and the effects achieved by the utility model.

The embodiment proposes a battery module, as shown in fig. 1, comprising a module housing 1, a battery cell module 2, and a bus bar 3, wherein the module housing 1 comprises a box body 101 and a box cover 102 which are combined, the two are detachably connected, a containing cavity for containing the battery cell module 2 and the bus bar 3 is provided, the bus bar 3 is located between the battery cell module 2 and the box cover 102, and a foaming structural adhesive layer 4 is filled between the bus bar 3 and the box cover 102.

The foaming structural adhesive layer 4 material has the characteristics of insulation and flame retardance; after foaming, the adhesive has adhesive property, and the adhesive body has compact pores, the hardness is more than or equal to Shore A40, and the thermal conductivity is less than or equal to 0.3W/mK. As shown in fig. 5, the foam structural adhesive has the characteristic of compact pores, so that the local stress received by the top case cover 102 of the battery module can be dispersed and released, and the energy generated by collision between the battery module 2 and the case cover 102 can be absorbed through pore shrinkage, thereby effectively solving the problem that the top of the battery module is damaged due to excessive deformation caused by stress. In addition, through the setting of foaming structural adhesive layer 4, can link together electric core module 2, busbar 3 and case lid 102 better to foaming structural adhesive layer 4 has still carried out the omnidirectional protection to busbar 3, prevents the emergence of high-voltage area short circuit accident under extreme case.

In order to better fix the foaming structural adhesive layer 4, as shown in fig. 2-4, a framework 5 is provided between the busbar 3 and the box cover 102 in this embodiment, the framework 5 is provided with a limiting groove 502 for limiting the busbar 3 and the foaming structural adhesive layer 4, so that the busbar 3 can be limited, the busbar 3 and the electric core pole in the electric core module 2 are welded, the foaming structural adhesive layer 4 can help to better connect and fix the busbar 3 and the electric core module 2, in addition, a low-voltage acquisition system 6 parallel to the busbar 3 can be further arranged in the limiting groove 502, the foaming structural adhesive layer 4 is also paved at the top of the low-voltage acquisition system 6, and the busbar 3 is connected with the low-voltage acquisition system 6, so that the low-voltage acquisition system 6 can be fixed. Specifically, as shown in fig. 3, the skeleton 5 may be an integrally formed structural member, and is provided with a limiting groove 502, as shown in fig. 2, the skeleton 5 may also include limiting rods 501 located at the top of the battery module at two sides of the busbar 3, and the limiting grooves 502 are formed between the limiting rods 501 at two sides, so that the assembly and the replacement are convenient.

In one possible embodiment, as shown in fig. 5, the battery module 2 includes a plurality of battery strings 201 electrically connected to each other, the top of the gap between two adjacent battery strings 201 is correspondingly provided with a through groove 503 formed by the frameworks 5, and the through groove 503 is filled with a foam structural adhesive layer 4, specifically, the through groove 503 may be a groove formed by a gap left between two frameworks 5, which may further help to release the local stress suffered by the case cover 102.

In another possible embodiment, the outer side of the cover 102 is also covered with the foamed structural adhesive layer 4. The local stress generated by collision of the box cover 102 can be further dispersed and released, the box cover 102 is better protected, and the foam structure adhesive layer 4 covering the box cover 102 can also generate good heat preservation effect on the cell module 2.

In order to just fix the foaming structural adhesive layer 4 outside the case cover 102, a plurality of grooves 103 can be formed in the outer side of the case cover 102, and the foaming structural adhesive layer 4 is filled in the grooves 103, so that the foaming structural adhesive layer 4 is better attached to the case cover 102, and the effect of releasing the stress of the case cover 102 is fully achieved.

In the description of this patent, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "front," "rear," "clockwise," "counterclockwise," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the patent.

In this patent, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is to be limited to the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (9)

1. A battery module comprises a module shell (1), an electric core module (2) and a bus bar (3), and is characterized in that,

The module housing (1) comprises a housing (101) and a housing cover (102) which are combined, the housing is provided with a housing cavity for housing the battery cell module (2) and the busbar (3), the busbar (3) is positioned between the battery cell module (2) and the housing cover (102), and a foaming structural adhesive layer (4) is filled between the busbar (3) and the housing cover (102).

2. The battery module according to claim 1, wherein a skeleton (5) is provided between the busbar (3) and the case cover (102), and the skeleton (5) has a limit groove (502) that limits the busbar (3) and the foamed structural adhesive layer (4).

3. The battery module according to claim 2, wherein the skeleton (5) comprises limit rods (501) on both sides of the busbar (3) at the top of the cell module (2), and the limit grooves (502) are formed between the limit rods (501) on both sides.

4. The battery module according to claim 2, wherein the battery module (2) comprises a plurality of battery strings (201) electrically connected with each other, through grooves (503) formed by the frameworks (5) are correspondingly formed at the tops of gaps between two adjacent battery strings (201), and the through grooves (503) are filled with the foaming structural adhesive layers (4).

5. The battery module according to claim 2, wherein the limiting groove (502) is further provided with a low-pressure collecting system (6) which is parallel to the busbar (3), and the top of the low-pressure collecting system (6) is also paved with the foaming structural adhesive layer (4).

6. The battery module according to claim 5, characterized in that the busbar (3) is welded to a cell post in the cell module (2), the busbar (3) being connected to the low voltage acquisition system (6).

7. The battery module according to claim 1, wherein the outer side of the case cover (102) is also covered with the foamed structural adhesive layer (4).

8. The battery module according to claim 7, wherein a plurality of grooves (103) are formed in the outer side of the case cover (102), and the grooves (103) are filled with the foaming structural adhesive layer (4).

9. The battery module according to any one of claims 1 to 8, wherein the case body (101) and the case cover (102) are detachably connected.