CN219371189U

CN219371189U - Battery module

Info

Publication number: CN219371189U
Application number: CN202320075337.3U
Authority: CN
Inventors: 蒙宏潜; 彭云峰; 韦远雄; 韦文亮; 周明君
Original assignee: Guangxi Huaguixing Times New Energy Technology Co ltd
Current assignee: Guangxi Huaguixing Times New Energy Technology Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-07-18
Anticipated expiration: 2033-01-10

Abstract

The utility model provides a battery module, and belongs to the technical field of secondary batteries. The battery module comprises a plurality of electric cores, wherein the electric cores are stacked in the thickness direction to form an electric core group, insulating sheets are respectively attached to the upper surface and the lower surface of the electric core group, thermoplastic films are arranged outside the insulating sheets, the thermoplastic films at least wrap the upper surface, the lower surface, the left surface and the right surface of the electric core group, and handles are arranged at the top of the thermoplastic films.

Description

Battery module

Technical Field

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

Background

Along with the development of technology and the influence of energy crisis, the automobile driving technology has been developed from traditional gasoline driving to electric driving, and therefore, the automobile is limited by the volume of the automobile, and the cruising time of the automobile and the energy density of the battery pack have a dense and indistinct relationship. The higher the energy density of the battery pack, the smaller the gaps between the batteries and between the battery modules, and in this case, how to ensure the insulation between the batteries becomes a technical problem to be solved.

An insulating board and a battery module (application number 202011412464.5) in the prior art disclose an insulating board and a battery module, wherein the insulating board comprises a bottom board and a cover board, folds are formed on the cover board, the cover board and the bottom board can be buckled and wrapped with a battery through the arrangement of the folds, and insulation of the battery module is realized. However, for the stability of the packed battery module, the bottom plate and the cover plate have to be provided with supporting members such as bosses, supporting protrusions, etc., for fixing the battery module. The support piece is arranged, so that the volume of the whole battery module is increased, and the energy density requirement of the battery module cannot be met.

Disclosure of Invention

The utility model provides a battery module aiming at the technical problems.

The utility model provides a battery module which comprises a plurality of battery cells, wherein the battery cells are stacked in the thickness direction to form a battery cell group, insulating sheets are respectively attached to the upper surface and the lower surface of the battery cell group, thermoplastic films are arranged outside the insulating sheets, the thermoplastic films at least wrap the upper surface, the lower surface, the left surface and the right surface of the battery cell group, and handles are arranged at the tops of the thermoplastic films.

Further, insulating sheets are attached to the left and right surfaces of the battery cell group.

Further, the sides of the insulating sheets attached to the four sides of the battery cell group are contacted.

Further, the rigidity of the insulating sheets positioned on the left and right sides of the cell group is not greater than the rigidity of the insulating sheets positioned on the upper and lower sides of the cell group.

Further, the insulating sheet is an epoxy plate or a plastic insulating sheet.

Further, any one of the insulating sheets is attached to the electric core group in a form of double-sided adhesive tape or structural adhesive tape.

Further, a crease is formed in a corner of the handle, so that the handle can be folded.

Further, the thermoplastic film also wraps the surface of the battery cell group, which is not provided with the pole.

The utility model provides a battery module which comprises a battery cell group formed by a plurality of battery cells, an insulating sheet and a thermoplastic film, wherein a handle is arranged at the top of the thermoplastic film. After the battery cells are assembled, insulating sheets are arranged on the upper surface and the lower surface of the battery cells. The insulating sheets attached to the upper and lower surfaces of the battery cell group help to enhance the overall rigidity of the module, and simultaneously enhance the insulating performance between the upper and lower adjacent battery modules. The thermoplastic film is at least wrapped on the upper, lower, left and right sides of the battery cell group, so that the battery cell group can be tightly wrapped, the overall rigidity of the battery cell group is improved, and meanwhile, the overall insulating property of the battery cell group can be further enhanced, so that the space utilization rate and the overall energy density of the battery pack are improved. And the arrangement of the handle is convenient for the hoisting of the battery module, and improves the assembly efficiency of the battery module.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a battery module according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a thermoplastic film according to an embodiment of the present utility model.

The reference numerals in the figures illustrate:

1-an electric core; 2-insulating sheets; 3-thermoplastic films; 4-handle; 5-pole; 6-thermoplastic film bottom surface.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "comprising" and "having" and any variations thereof, as used in the embodiments of the present utility model, are intended to cover non-exclusive inclusion.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a battery module, which includes a plurality of battery cells 1, wherein the plurality of battery cells 1 are stacked in a thickness direction to form a battery cell group, insulating sheets 2 are attached to upper and lower surfaces of the battery cell group, thermoplastic films 3 are disposed outside the insulating sheets 2, the thermoplastic films 3 at least wrap the upper, lower, left and right surfaces of the battery cell group, and handles 4 are disposed at the top of the thermoplastic films 3.

In the embodiment of the utility model, after the battery cell group is formed, a plurality of battery cells 1 are stacked along the thickness direction, the number is usually determined according to the electric quantity requirement of the system, and the number of the battery cells 1 is not limited. After the battery cells are assembled, insulating sheets 2 are arranged on the upper surface and the lower surface of the battery cells. The insulating sheets 2 attached to the upper and lower surfaces of the battery cell stack help to enhance the overall rigidity of the module while increasing the insulating properties between the upper and lower adjacent battery modules. The thermoplastic films 3 further wrap the upper, lower, left and right sides of the battery cell group, so that the battery cell group can be tightly wrapped, the overall rigidity of the battery cell group is improved, and meanwhile, the overall insulating property of the battery cell group can be further enhanced, so that the space utilization rate and the overall energy density of the battery pack are improved.

It should be noted that, as shown in fig. 2, the cells 1 in the cell group may be stacked longitudinally; as shown in fig. 3, the cells 1 in the cell group may be stacked laterally. Both stacking modes are common stacking modes and are also located in the protection scope provided by the embodiment of the utility model.

In addition to attaching insulating sheets on the upper and lower surfaces, it is also conceivable to attach insulating sheets on the left and right surfaces of the cell groups to enhance the insulating performance in the lateral direction between the cell groups. Unlike the insulating sheets 2 attached to the upper and lower surfaces of the cell stack, the insulating sheets 2 attached to the left and right surfaces of the cell stack may be made of a material having rigidity not greater than that of the insulating sheets 2 on the upper and lower surfaces according to practical requirements and cost considerations. However, in view of manufacturing, the four insulating sheets 2 on the upper, lower, left and right surfaces are generally made of the same material, so as to improve manufacturing efficiency.

The material of the insulating sheet 2 is preferably an epoxy plate, which is also called an epoxy glass fiber plate, and has high mechanical property, dielectric property, heat resistance, moisture resistance, and machinability, and the thickness of the insulating sheet can be as thin as 0.5 mm, so that the insulating sheet can provide good insulating property for the battery module, and the volume of the battery module is not increased. Next, for cost reasons, the material of the insulating sheet 2 may be selected from plastic insulating sheets.

In addition, as the battery module is often required to be hoisted by a tool when assembled into a battery Pack (Pack), the tool occupies the space of the battery Pack on one hand, and the space utilization rate is reduced; on the other hand, the use of the tool involves assembly and disassembly, which reduces the assembly efficiency; therefore, in order to facilitate the lifting and also to ensure that the efficiency of the equipment is not reduced, as shown in fig. 2 or 3, in the embodiment of the present utility model, the top surface of the thermoplastic film 3 is provided with a handle 4. Further, in order to save space of the battery pack and improve space utilization, the corners of the handle 4 may be provided with creases so that the handle 4 may be folded, thus not affecting the lifting assembly nor the space utilization of the battery pack.

In the embodiment of the utility model, since the insulating sheets 2 on the upper and lower surfaces are required to strengthen the overall rigidity of the battery module in addition to the insulating performance, the larger the size of the insulating sheets 2 on the upper and lower surfaces is, the better, i.e. the size of the insulating sheets 2 on the optimal upper and lower surfaces is as large as the contact surface of the battery cell group; similarly, the insulating sheets 2 on the left and right surfaces provide insulating properties, so that the larger the area is, the better, and optimally as large as the contact surface of the cell group, depending on the number of stacks of the cells. Finally, as shown in fig. 1, the sides of the insulating sheets 2 attached on four sides of the cell group are in contact with each other.

Because the insulating sheet 2 is an epoxy plate or a plastic insulating sheet, the optimal setting mode is to attach the insulating sheet 2 and the battery cells into a relatively firm whole by a double-sided adhesive tape or a structural adhesive, and the subsequent processing steps are convenient. Finally, a layer of thermoplastic film 3 is wrapped outside the cell assembly attached with the insulating sheet 2, and the thermoplastic film 3 is shrunk and molded in a thermoplastic mode. As shown in fig. 2 or 3, the molded thermoplastic film 3 tightly wraps the battery module, and the thermoplastic film 3 molds and reinforces the whole of the battery module, which can help to improve the overall rigidity and insulation performance of the battery module.

In the embodiment of the utility model, generally, the thermoplastic film 3 may only wrap the four sides of the battery cell group where the insulating sheet 2 is disposed, that is, as shown in fig. 4, the thermoplastic film bottom surface 6 may not exist, or the thermoplastic film bottom surface 6 may be disposed, that is, the thermoplastic film 3 may wrap the side of the battery cell group where the electrode post 5 is not disposed, so that the packaging effect is more stable, the whole battery module can have better rigidity and insulating performance, and the conductivity of the battery module is not affected.

The beneficial effects of the utility model are as follows: the battery module provided by the embodiment of the utility model comprises a battery cell group formed by a plurality of battery cells, an insulating sheet and a thermoplastic film, wherein a handle is arranged at the top of the thermoplastic film. After the battery cells are assembled, insulating sheets are arranged on the upper surface and the lower surface of the battery cells. The insulating sheets attached to the upper and lower surfaces of the battery cell group help to enhance the overall rigidity of the module, and simultaneously enhance the insulating performance between the upper and lower adjacent battery modules. The thermoplastic film is at least wrapped on the upper, lower, left and right sides of the battery cell group, so that the battery cell group can be tightly wrapped, the overall rigidity of the battery cell group is improved, and meanwhile, the overall insulating property of the battery cell group can be further enhanced, so that the space utilization rate and the overall energy density of the battery pack are improved. And the arrangement of the handle is convenient for the hoisting of the battery module, and improves the assembly efficiency of the battery module.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model, but it should be understood by those skilled in the art that the present utility model is not limited thereto, and that the present utility model is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit of the corresponding technical solutions. Are intended to be encompassed within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. The battery module comprises a plurality of battery cells, and is characterized in that the battery cells are stacked in the thickness direction to form a battery cell group, insulating sheets are attached to the upper surface and the lower surface of the battery cell group, thermoplastic films are arranged outside the insulating sheets, the thermoplastic films at least wrap the upper surface, the lower surface, the left surface and the right surface of the battery cell group, and handles are arranged at the top of the thermoplastic films.

2. The battery module according to claim 1, wherein insulating sheets are attached to both left and right sides of the battery cell group.

3. The battery module according to claim 2, wherein the sides of the insulating sheets attached to the four sides of the battery cell group are in contact.

4. The battery module according to claim 2, wherein the rigidity of the insulating sheets located at the left and right sides of the battery cell group is not greater than the rigidity of the insulating sheets located at the upper and lower sides of the battery cell group.

5. The battery module according to claim 2, wherein the insulating sheet is an epoxy plate or a plastic insulating sheet.

6. The battery module according to claim 2, wherein any one of the insulating sheets is attached to the battery cell group by means of double-sided adhesive tape or structural adhesive.

7. The battery module according to claim 1, wherein corners of the handle are provided with creases so that the handle is foldable.

8. The battery module according to claim 1, wherein the thermoplastic film further wraps a face of the cell group on which the electrode posts are not provided.