CN216161840U

CN216161840U - Battery cell connecting structure, battery cell, battery module and battery

Info

Publication number: CN216161840U
Application number: CN202122093543.0U
Authority: CN
Inventors: 刘家男; 刘学峰
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-04-01
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to the field of batteries and discloses a battery cell connecting structure, a battery cell, a battery module and a battery. The battery cell connecting structure comprises a first frame body and a second frame body, wherein the first frame body and the second frame body are made of elastic materials, and a first bonding glue layer is arranged between the first frame body and the second frame body. At least one side of the battery cell is provided with the battery cell connecting structure. The battery module comprises the battery cells, and the two adjacent battery cells are connected through a battery cell connecting structure. The battery comprises the battery module. According to the utility model, the gluing amount and the gluing route can be effectively controlled through the first frame body and the second frame body, so that the cells can be firmly fixed, and adverse phenomena such as glue overflow and the like can not occur; first framework and second framework adopt the elastic material, can greatly reduce the requirement of the total dimensional tolerance of various kinds of parts that the control of module total size corresponds, very big improvement the yields of product, simultaneously, because effective electric core volume space is big, be favorable to the promotion of the total energy of module.

Description

Battery cell connecting structure, battery cell, battery module and battery

Technical Field

The utility model relates to the field of batteries, in particular to a battery cell connecting structure, a battery cell, a battery module and a battery.

Background

With the increasing environmental and energy problems in recent years, new energy electric vehicles gradually come into the field of view, and lithium ion power batteries have also received wide attention as the main power source of new energy vehicles. The power battery module is the most important component of the power battery pack, and the battery core is the important component of the power battery module. The traditional battery core is connected with the battery core in a foam bonding mode or in a bonding mode of bonding glue.

The bonding strength is small by adopting a foam bonding mode, the foam thickness is large, the compressibility is small, the dimensional tolerance of various pieces controlled by the total size of the battery module is high, and the size guarantee manufacturability is poor. Simultaneously, because effective electric core volume space is little, also do not benefit to the promotion of the total energy of module.

Although the bonding strength is high by adopting a bonding glue bonding mode, the distribution of the bonding glue amount and the glue is difficult to control, and if the bonding glue amount is too small, the bonding strength is not consistent with the design value, and the bonding force is seriously insufficient; if the glue coating amount is too much, the weight and the cost are increased, the glue overflows to pollute a module, the module is seriously inconsistent with the design state, and the economical efficiency is low; and the glue distribution is difficult to control, which causes the performance of the module structure to be reduced and the design requirement not to be satisfied.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems or at least partially solve the technical problems, the utility model provides a cell connecting structure, a cell, a battery module and a battery.

The utility model provides a battery cell connecting structure which comprises a first frame body and a second frame body, wherein the first frame body and the second frame body are arranged on the side surfaces of a battery cell, the first frame body and the second frame body are both made of elastic materials, and a first bonding glue layer is arranged between the first frame body and the second frame body.

Preferably, the first frame and the second frame are both rectangular structures, and the second frame is disposed inside the first frame.

Preferably, the central axis of the first frame body coincides with the central axis of the second frame body.

Preferably, the first frame and the second frame are made of foam.

Preferably, the two sides of the first frame body and the second frame body are both provided with a second adhesive layer.

The utility model also provides a battery cell, and at least one side surface of the battery cell is provided with the battery cell connecting structure.

The utility model also provides a battery module which comprises the battery cells, and two adjacent battery cells are connected through the battery cell connecting structure.

The utility model also provides a battery which comprises the battery module.

Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:

the side surfaces of the battery cells are provided with the first frame body and the second frame body, and the first adhesive layer is formed between the first frame body and the second frame body by gluing and is used for connecting two adjacent battery cells, so that the structure is simple, the cost is low, the occupied space is small, the gluing amount and the gluing route can be effectively controlled through the first frame body and the second frame body, the firm fixation among the battery cells can be realized, and the bad phenomena of glue overflow and the like can not occur; first framework and second framework adopt the elasticity material, can greatly reduce the requirement of the total size control of module corresponding various sample size tolerance, guarantee that manufacturability is excellent, very big improvement the yields of volume production product, simultaneously, because effective electric core volume space is big, be favorable to the promotion of the total energy of module.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

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

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a sectional view of an arrangement of the first housing and the second housing according to the embodiment of the present invention.

Description of the reference numerals

1. A first frame body; 2. a second frame body; 3. a first adhesive layer; 4. and (5) battery cores.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in the specification are only a part of the embodiments of the present invention, and not all of them.

Referring to fig. 1 to 3, a cell connection structure provided in an embodiment of the present invention includes a first frame 1 and a second frame 2, which are used to be mounted on side surfaces of a cell 4, where the first frame 1 and the second frame 2 are both made of elastic materials, a first adhesive layer 3 is disposed between the first frame 1 and the second frame 2, and the first adhesive layer 3 connects two adjacent cells 4. The first frame body 1 and the second frame body 2 both have a certain thickness, so that a gluing channel can be defined between the first frame body 1 and the second frame body 2.

During assembly, the assembled battery cell 4 is placed in an assembly area, the surface of each battery cell 4 is cleaned, and the first frame body 1 and the second frame body 2 are installed on the side face of the battery cell 4 according to the design position. Then glue is coated between the first frame body 1 and the second frame body 2 according to the design, so that a first bonding glue layer 3 is formed at the position corresponding to the battery cell 4, and the thickness of the first bonding glue layer 3 is smaller than that of the first frame body 1 and the second frame body 2, so that the battery cell 4 is prevented from being polluted by glue flowing out. And finally, the battery cell 4 coated with the glue is connected with the battery cell 4 adjacent to the battery cell 4, and in the connection process, the battery cell 4 is pushed to compress the first frame body 1 and the second frame body 2 until the battery cell 4 is connected with the battery cell 4 through the first bonding glue layer 3. By analogy, the battery cell 4 and the battery cell 4 are sequentially stacked, and the battery cell is pressurized and pre-tightened in place according to the preset total length of the module.

In some embodiments, as shown in fig. 1 to fig. 3, the first frame body 1 and the second frame body 2 are both rectangular structures, and the second frame body 2 is disposed inside the first frame body 1, and this design manner is adapted to the side shape of the battery cell 4, so that the shape enclosed by the first frame body 1 and the second frame body 2 can be adapted to the shape of the battery cell 4, thereby ensuring that the area of the first adhesive layer 3 meets the design requirement, and ensuring the connection strength between the battery cell 4 and the battery cell 4. Further optimally, the axis of the first frame body 1 coincides with the axis of the second frame body 2, and the first adhesive layers 3 are uniformly distributed on the side surface of the battery cell 4 in the design mode, so that the connection strength of each position between the battery cell 4 and the battery cell 4 is uniform.

In other embodiments, the first frame 1 and the second frame 2 may also be oval, circular, and other irregular shapes, and the shapes of the first frame 1 and the second frame 2 may also be different, but it is necessary to ensure that the shape enclosed by the first frame 1 and the second frame 2 can meet the requirement of gluing, and the formed first adhesive layer 3 can meet the requirement of connection strength.

The first frame body 1 and the second frame body 2 are made of foam materials, the requirement on deformation can be met, second adhesive layers are arranged on two sides of the first frame body 1 and the second frame body 2, the first frame body 1 and the second frame body 2 can be connected with two adjacent battery cores 4 through the second adhesive layers and further matched with the first adhesive layers 3, the two adjacent battery cores 4 are firmly fixed, and the requirement on installation strength of a battery module is met. In addition, under unusual operating mode (broken fast battery module), rationally fix battery module, electric core 4 through this kind of design's first framework 1 and second framework 2 can be fine, and bad phenomena such as excessive glue can not appear.

The side surface of the battery cell 4 is provided with the first frame body 1 and the second frame body 2, and the first adhesive layer 3 is formed between the first frame body 1 and the second frame body 2 by gluing and is used for connecting two adjacent battery cells 4, so that the structure is simple, the cost is low, the occupied space is small, the gluing amount and the gluing route can be effectively controlled through the first frame body 1 and the second frame body 2, the battery cells 4 can be firmly fixed, and adverse phenomena such as glue overflow and the like can not occur; first framework 1 and second framework 2 adopt the elastic material, can greatly reduce the requirement of the total size control of module corresponding various sample size tolerance, guarantee that manufacturability is excellent, very big improvement the yields of volume production product, simultaneously, because effective 4 volumetric spaces of electric core are big, be favorable to the promotion of the total energy of module.

The utility model also provides a battery cell 4, at least one side surface of the battery cell 4 is provided with the battery cell connecting structure, and the battery cell connecting structure comprises all the technical characteristics of the battery cell connecting structure, so that the description is not excessive.

The utility model also provides a battery module which comprises the battery cores 4, wherein two adjacent battery cores 4 are connected through the battery core connecting structure, and in addition, the battery core connecting structure is also arranged between the battery cores 4 and the shell of the battery module, so that the connection firmness is ensured. The cell connection structure includes all technical features of the cell connection structure, and therefore, not described herein.

The utility model also provides a battery, which comprises the battery module, wherein the battery module comprises all the technical characteristics of the battery module and further comprises all the technical characteristics of the battery core connecting structure, so that the battery is not described in more detail.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a battery cell connection structure, its characterized in that, battery cell connection structure is including being used for installing first framework (1) and second framework (2) in electric core (4) side, first framework (1) with second framework (2) all adopt the elasticity material, first framework (1) with be equipped with first bonding glue film (3) between second framework (2).

2. The cell connecting structure according to claim 1, wherein the first frame body (1) and the second frame body (2) are both rectangular structures, and the second frame body (2) is disposed inside the first frame body (1).

3. The cell connection structure according to claim 2, wherein the central axis of the first frame body (1) coincides with the central axis of the second frame body (2).

4. The cell connecting structure according to claim 1, wherein the first frame body (1) and the second frame body (2) are made of foam.

5. The battery cell connecting structure according to claim 1, wherein second adhesive layers are disposed on two sides of the first frame body (1) and the second frame body (2).

6. A battery cell (4), characterized in that at least one side of the battery cell (4) is provided with a cell connection structure according to any of claims 1 to 5.

7. A battery module, characterized by comprising the battery cells (4) as set forth in claim 6, wherein two adjacent battery cells (4) are connected through the cell connecting structure.

8. A battery comprising the battery module according to claim 7.