CN217426909U

CN217426909U - Battery pack

Info

Publication number: CN217426909U
Application number: CN202220720605.8U
Authority: CN
Inventors: 姜胜利; 王一宇
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-09-13
Anticipated expiration: 2032-03-29

Abstract

The utility model provides a battery pack relates to the battery field. The battery pack comprises a battery module, a cold plate, a first heat conduction structure adhesive layer and a heat insulation part, wherein the heat conductivity coefficient of the heat insulation part is smaller than that of the first heat conduction structure adhesive, the battery module and the cold plate are provided with the first heat conduction structure adhesive layer, and the battery module and the cold plate are provided with the heat insulation part. The battery package of this application is through setting up the portion of insulating heat between battery module and cold drawing, and the coefficient of heat conductivity of the portion of insulating heat is less than the coefficient of heat conductivity of first heat conduction structure glue film, can reduce the speed that the heat of battery module scatters and disappears, and then reduces scattering and disappearing of the heat of battery module, has solved the relatively poor problem of current battery package heat preservation effect, has promoted the heat preservation effect of battery package.

Description

Battery pack

Technical Field

The application relates to the field of batteries, in particular to a battery pack.

Background

With the development of new energy industry, electric vehicles are more and more widely applied. In electric automobile's battery package, bond on the surface of cold drawing after the bottom of battery module is generally scribbled heat conduction structure and is glued to realize the heat dissipation of battery module. However, when the bottom of the battery module is fully coated with the heat-conducting structural adhesive, the heat of the battery module can be rapidly dissipated to the cold plate, and the heat-preserving effect of the battery pack is poor.

SUMMERY OF THE UTILITY MODEL

In view of this, this application provides a battery package, through set up the heat insulating part between battery module and cold drawing, the coefficient of heat conductivity of heat insulating part is less than the coefficient of heat conductivity of first heat conduction structure glue film, can reduce the speed that the heat of battery module scatters and disappears, and then reduces scattering and disappearing of the heat of battery module, has solved the relatively poor problem of current battery package heat preservation effect, has promoted the heat preservation effect of battery package.

According to the application, a battery pack is provided, the battery pack includes battery module, cold drawing, first heat conduction structure glue film and thermal-insulated portion, the coefficient of heat conductivity of thermal-insulated portion is less than the coefficient of heat conductivity that first heat conduction structure glued, the battery module with be provided with between the cold drawing first heat conduction structure glue film, the battery module with be provided with between the cold drawing thermal-insulated portion.

Preferably, the heat insulation portion is disposed between one portion of the battery module and the cold plate, and the first heat conduction adhesive layer is disposed between the other portion of the battery module and the cold plate.

Preferably, the battery module includes a plurality of battery cells arranged along a first direction, two of the battery cells at ends of the first direction each include a mounting plane, and the heat insulation portion is disposed between the mounting plane and the cold plate. Preferably, the mounting plane is divided into a plurality of regions along a second direction, the second direction is perpendicular to the first direction, a plurality of mounting spaces corresponding to the plurality of regions one to one are defined between the plurality of regions and the cold plate, the heat insulation portion and the first heat conduction structure adhesive layer are alternately arranged in the plurality of mounting spaces, and the first heat conduction structure adhesive layer is attached to the mounting plane.

Preferably, the area of the mounting plane, which is attached to the first thermal conductive adhesive layer, occupies 50% of the area of the mounting plane.

Preferably, a thickness of the heat insulating portion in a third direction is smaller than a thickness of the first heat conductive structural adhesive layer in the third direction, and the third direction is perpendicular to both the first direction and the second direction.

Preferably, the battery pack further includes a second heat-conducting structural adhesive layer, and the second heat-conducting structural adhesive layer is disposed between the heat insulation portion and the battery module.

Preferably, the difference between the thickness of the first heat-conducting structural adhesive layer in the third direction and the thickness of the heat insulation part in the third direction is less than 0.3 mm.

Preferably, the thickness of the first heat conduction structural adhesive layer in the third direction is less than 1mm, and the thickness of the heat insulation part in the third direction is 0.7 mm.

Preferably, the thermal insulation is formed as an epoxy gasket.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 shows a schematic plan structure view of a battery pack according to an embodiment of the present invention;

fig. 2 shows a schematic view of a cross-sectional structure along a-a' of the battery pack according to fig. 1;

FIG. 3 shows an enlarged schematic view of section B of FIG. 2;

fig. 4 shows a state after the battery module is applied with glue.

Icon: 100-electric core; 200-a cold plate; 300-a thermal insulation; 400-a first thermally conductive structural adhesive layer; 500-a second layer of thermally conductive structural adhesive; l1-first direction; l2-second direction; l3-third direction.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent upon understanding the present disclosure.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of this application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

Before this application provided, the bottom of the battery module in the battery package bonds on the surface of cold drawing after generally scribbling heat conduction structure and gluing to realize the heat dissipation of battery module. However, the heat preservation effect of the battery pack is poor. Based on this, the technical scheme of this application is proposed.

According to the application, a battery pack comprises a battery module, a cold plate, a first heat conduction structure adhesive layer and a heat insulation part, wherein the heat conduction coefficient of the heat insulation part is smaller than the thickness of the first heat conduction structure adhesive layer, the first heat conduction structure adhesive layer is arranged between the battery module and the cold plate, and the heat insulation part is arranged between the battery module and the cold plate. This battery package sets up thermal-insulated portion between battery module and cold drawing, and the coefficient of heat conductivity of thermal-insulated portion is less than the coefficient of heat conductivity of first heat conduction structure glue film, can reduce the speed that the heat of battery module scatters and disappears, and then reduces scattering and disappearing of the heat of battery module, has solved the relatively poor problem of current battery package heat preservation effect, has promoted the heat preservation effect of battery package.

Further, a heat insulation part is arranged between one part of the battery module and the cold plate, and a first heat conduction structural adhesive layer is arranged between the other part of the battery module and the cold plate. Compare in prior art, the bottom of battery module is whole to be scribbled when heat conduction structure glues the heat preservation effect of battery package relatively poor, and the heat of the battery module in this application can diffuse to the cold drawing, can reduce thermal diffusion velocity through setting up the heat-insulating part simultaneously, has promoted the heat preservation effect of battery package.

Preferably, the heat insulating part is formed as an epoxy gasket, so that the heat insulating performance of the battery pack can be further improved.

As shown in fig. 1, the battery module includes a plurality of battery cells 100 arranged along a first direction L1, the cold plate 200 protrudes outward relative to an edge of the battery module, and two of the battery cells 100 at two ends of the battery module in the first direction L1 include a mounting plane, and as shown in fig. 2 and 3, a thermal insulation part 300 is arranged between the mounting plane (an upper plane of the battery cell 100 shown in fig. 2 and 3) and the cold plate (not shown in fig. 2 and 3). The first thermal conductive structural adhesive layer 400 is disposed between the remaining battery cells 100 and the cold plate, except for two battery cells 100 located at both ends of the first direction L1. In the battery package, two electric cores 100 of the tip of battery module generally appear in microthermal position, set up heat-insulating part 300 between two electric cores 100 and the cold plate through both ends on first direction L1 in this application, can reduce the thermal speed of scattering and disappearing that is located two electric cores 100 of tip, promoted the heat preservation effect that is located two electric cores 100 of tip, and then promoted the heat preservation effect of battery package.

As shown in fig. 3, the installation plane is divided into a plurality of regions along the second direction L2, the second direction L2 is perpendicular to the first direction L1, a plurality of installation spaces corresponding to the plurality of regions one to one are enclosed between the plurality of regions of the installation plane and the cold plate, the first thermal conductive structural adhesive layers 400 and the thermal insulation portions 300 are alternately connected in the installation spaces, and the first thermal conductive structural adhesive layers 400 are attached to the installation plane. Particularly, the first installation space that lies in the tip among a plurality of installation spaces is provided with thermal-insulated portion 300, and the second installation space adjacent with first installation space is provided with first heat conduction structure glue film 400, and the third installation space adjacent with second installation space is provided with thermal-insulated portion 300, so, set gradually, can promote the heat preservation effect that lies in the electric core 100 of tip when guaranteeing the radiating effect that lies in the electric core 100 of tip, and then promoted the heat preservation effect of battery package.

Preferably, the area of the mounting plane and the first thermal conductive adhesive layer 400 occupies 50% of the area of the mounting plane, so that the heat preservation effect of the two battery cells located at the end of the first direction can be ensured.

As shown in fig. 3, the thickness of the first thermal conductive adhesive layer in the third direction L3 is greater than that of the thermal insulation part 300 in the third direction L3, and the first direction L1, the second direction L2 and the third direction L3 are perpendicular to each other two by two. Thus, a gap is formed between the heat insulating part 300 and the battery module, a second heat conductive adhesive layer is disposed in the gap, and both sides of the second heat conductive adhesive layer are respectively attached to the heat insulating part 300 and the battery module. Thus, the adhesion of the heat insulating part 300 to the battery module is realized, and the stability of the installation between the heat insulating part 300 and the battery module is ensured.

It should be noted that although the imaginary boundary lines C-C 'and D-D' of the first and second thermal conductive adhesive

structural layers

400 and 500 are illustrated in fig. 2 and 3, it should be understood that the first and second thermal conductive adhesive

structural layers

400 and 500 may be integrally formed in the entity of the battery pack, and there may not be any boundary line between the first and second thermal conductive adhesive

structural layers

400 and 500.

Further, the difference between the thickness of the first thermal structural adhesive layer 400 in the third direction L3 and the thickness of the heat insulation part 300 in the third direction L3 is less than 0.3 mm. In this way, the stability of the installation of the battery module and the heat insulating part 300 can be ensured.

Preferably, the thickness of the first thermal conductive adhesive layer 400 in the third direction L3 is less than 1mm, and the thickness of the thermal insulation part 300 in the third direction L3 is 0.7mm, so that the thermal insulation performance of the battery cell can be considered while the thermal insulation performance of the battery cell is ensured.

When the battery pack is assembled, the other areas of the bottom of the battery module except the area of the mounting plane corresponding to the heat insulation part 300 are coated with the heat-conducting structural adhesive, the thickness of the coated adhesive is 1mm, the coated state is as shown in fig. 4, wherein the position of the small block is the area corresponding to the heat insulation part, i.e., the area coated with the heat-conducting structural adhesive. The thickness of thermal-insulated portion 300 is less than the thickness of first heat conduction glue film, make be formed with the gap between thermal-insulated portion 300 and the battery module, after the installation is accomplished, the heat conduction structure of first heat conduction structure glue film 400 can spill over to the gap between thermal-insulated portion 300 and the battery module, thus, heat conduction structure between other regions of the bottom of battery module and the cold drawing after the installation is accomplished glues and is formed into first heat conduction structure glue film 400, the thickness of first heat conduction structure glue film 400 is less than 1mm, heat conduction structure between thermal-insulated portion 300 and the battery module glues and forms into second heat conduction structure glue film 500, thus, when can guarantee the radiating of battery module of battery package, the heat preservation effect of battery package has been promoted.

According to the battery package that this application provided, through set up the portion of insulating heat between battery module and cold drawing, the coefficient of heat conductivity of the portion of insulating heat is less than the coefficient of heat conductivity of first heat conduction structure glue film, can reduce the speed that the heat of battery module scatters and disappears, and then reduces scattering and disappearing of the heat of battery module, has solved the relatively poor problem of current battery package heat preservation effect, has promoted the heat preservation effect of battery package.

In addition, according to the battery package of this application, through setting up thermal-insulated portion with the battery module between the mounting plane of the electric core of two tip on the first direction and the cold plate, can slow down the thermal speed of scattering and disappearing of two electric cores of tip on the first direction, promoted the heat preservation effect of two electric cores that are located the tip, and then promoted the heat preservation effect of battery package.

In addition, according to the battery pack of this application, through setting up first heat conduction glue film and thermal-insulated portion in turn for can compromise heat dissipation and thermal insulation performance simultaneously of two electric cores of tip on the first direction.

In addition, according to the battery pack of this application, set up to 50% of mounting plane's area through the area with mounting plane and the laminating of heat conduction structure, guaranteed the heat preservation effect that is located two electric cores of first direction tip.

In addition, according to the battery package of this application, through setting up second heat conduction structure glue film between thermal-insulated portion and battery module for thermal-insulated portion bonds on battery module, can guarantee the stability of thermal-insulated portion and battery module installation.

In addition, according to the battery package of this application, the difference of the thickness of first heat conduction structure glue film on the third direction and the thickness of heat insulating part on the third direction is less than 0.3mm, so, has further guaranteed the stability of being connected between battery module and the heat insulating part.

In addition, according to the battery package of this application, through setting up thermal-insulated portion to the epoxy gasket, can promote the heat preservation effect of battery package through one step.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a battery pack, its characterized in that, battery pack includes battery module, cold drawing, first heat conduction structure glue film and heat insulating part, the coefficient of heat conductivity of heat insulating part is less than the coefficient of heat conductivity that first heat conduction structure glued, battery module with be provided with between the cold drawing first heat conduction structure glue film, battery module with be provided with between the cold drawing heat insulating part.

2. The battery pack according to claim 1, wherein the thermal insulation portion is disposed between one portion of the battery module and the cold plate, and the first thermal conductive structural adhesive layer is disposed between the other portion of the battery module and the cold plate.

3. The battery pack of claim 2, wherein the battery module comprises a plurality of cells arranged along a first direction, wherein two of the cells at ends of the plurality of cells in the first direction each comprise a mounting plane, and the thermal insulation portion is arranged between the mounting plane and the cold plate.

4. The battery pack according to claim 3, wherein the mounting plane is divided into a plurality of regions along a second direction, the second direction is perpendicular to the first direction, a plurality of mounting spaces corresponding to the plurality of regions one to one are defined between the plurality of regions and the cold plate, the thermal insulation portions and the first thermal conductive adhesive layers are alternately disposed in the plurality of mounting spaces, and the first thermal conductive adhesive layers are attached to the mounting plane.

5. The battery pack of claim 4, wherein the mounting plane has an area that conforms to the first thermal conductive structural adhesive layer that is 50% of the area of the mounting plane.

6. The battery pack according to claim 4, wherein a thickness of the heat insulating portion in a third direction, which is perpendicular to both the first direction and the second direction, is smaller than a thickness of the first heat conductive structural adhesive layer in the third direction.

7. The battery pack according to claim 6, further comprising a second heat conductive structural adhesive layer disposed between the heat insulating part and the battery module.

8. The battery pack according to claim 6, wherein a difference between a thickness of the first thermal structural adhesive layer in the third direction and a thickness of the thermal insulation portion in the third direction is less than 0.3 mm.

9. The battery pack according to claim 6, wherein the first thermal conductive adhesive layer has a thickness of less than 1mm in the third direction, and the thermal insulating portion has a thickness of 0.7mm in the third direction.

10. The battery pack according to any one of claims 1 to 9, wherein the heat insulating portion is formed as an epoxy gasket.