CN218996842U

CN218996842U - Battery cell structure, battery pack and new energy electric automobile

Info

Publication number: CN218996842U
Application number: CN202222463941.1U
Authority: CN
Inventors: 王俊龙; 刘岩松; 范圣豪; 李晶; 傅吉瑶
Original assignee: Nantong Institute of Technology
Current assignee: Nantong Institute of Technology
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-05-09
Anticipated expiration: 2032-09-16

Abstract

The application discloses electric core structure, battery package and new forms of energy electric automobile, include a plurality of electric cores that arrange the setting along first direction, and be equipped with heat conduction structure between two adjacent electric cores, heat conduction structure includes two heat conduction layers and insulating layer, two heat conduction layers all have the contact terminal that is used for with the heat dissipation face contact of battery package, the insulating layer sets up between two heat conduction layers, at least one of two heat conduction layers is equipped with heat conduction connecting portion, and through heat conduction connecting portion heat conduction contact between two heat conduction layers. The battery cell structure, the battery pack and the new energy electric automobile provided by the application increase the heat transfer path of the thermal runaway battery cell, improve the heat transfer efficiency of the thermal runaway battery cell, and further improve the safety performance of the battery pack and the new energy electric automobile.

Description

Battery cell structure, battery pack and new energy electric automobile

Technical Field

The utility model relates to the technical field of automobiles, in particular to a battery cell structure, a battery pack and a new energy electric automobile.

Background

The power source of new forms of energy electric automobile is the battery package, and the battery package includes the electric core structure, and the electric core structure is equipped with the insulating layer with the heat transfer of the heat of restraining thermal runaway electric core to rather than adjacent electric core including a plurality of electric cores of arranging the setting between two adjacent electric cores. Wherein, the insulating layer completely cuts off between two adjacent electric cores.

However, the heat transfer effect of the thermal runaway battery cells in the conventional battery pack is not high, so that the safety performance of the battery pack is not good.

Disclosure of Invention

In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide a cell structure, a battery pack, and a new energy electric vehicle.

In a first aspect, the application provides a battery cell structure, including a plurality of battery cells that arrange the setting along first direction, and be equipped with heat conduction structure between two adjacent battery cells, heat conduction structure includes two heat conduction layers and insulating layer, two heat conduction layers all have the contact terminal that is used for with the heat dissipation face contact of battery package, the insulating layer sets up between two heat conduction layers, at least one of two heat conduction layers is equipped with heat conduction connecting portion, and through heat conduction connecting portion heat conduction contact between two heat conduction layers.

Further, the two heat conduction layers comprise a first heat conduction layer and a second heat conduction layer, the first heat conduction layer comprises a layer body part and a first extension part, the heat insulation layer is arranged between the layer body part and the second heat conduction layer, the first extension part is arranged on one side of the layer body part, which is close to the second heat conduction layer, and is positioned on the outer periphery side of the heat insulation layer, and the first extension part extends from the layer body part towards the direction of the second heat conduction layer and is in heat conduction contact with the second heat conduction layer, wherein the first extension part forms a heat conduction connection part.

Further, the first extension part is of an annular structure and is arranged on the outer periphery of the layer body, an installation cavity is formed between the first extension part and the layer body, and the heat insulation layer is installed in the installation cavity.

Further, the first heat conduction layer and the second heat conduction layer are of an integrated structure, the first extension part is provided with a separation opening, and the heat insulation layer is mounted to the mounting cavity through the separation opening.

Further, the partition opening is located at one side of the first extension portion along the second direction, and the first direction is perpendicular to the second direction.

Further, two heat conduction layers include first heat conduction layer and second heat conduction layer, first heat conduction layer includes layer body portion and second extension, the insulating layer sets up between layer body portion and second heat conduction layer, the second extension sets up in layer body portion be close to one side of second heat conduction layer and be located the periphery side of insulating layer, the insulating layer is equipped with the installation through-hole that runs through along first direction, the second extension extends from layer body portion towards second heat conduction layer direction and wears to locate the installation through-hole and heat conduction contact with second heat conduction layer, the second extension constitutes heat conduction connecting portion.

Further, the number of the installation through holes and the number of the second extending parts are all a plurality of, and the plurality of the second extending parts penetrate through the plurality of the installation through holes in a one-to-one correspondence manner.

Further, the shape of the mounting through hole and the second extension portion is adapted.

In a second aspect, the present application also provides a battery pack including a cell structure.

In a third aspect, the application further provides a new energy electric automobile, which comprises a battery pack.

The utility model provides a battery cell structure, battery package and new energy electric automobile through being equipped with heat-conducting structure between two adjacent battery cells, heat-conducting structure includes two heat conduction layers and sets up the insulating layer between two heat conduction layers, at least one of two heat conduction layers is equipped with heat conduction connecting portion, and through heat conduction connecting portion heat conduction contact between two heat conduction layers, make heat-conducting structure can be with the heat transfer of the partial heat of thermal runaway battery cell to the radiating surface of battery package and with the adjacent battery cell of thermal runaway battery cell respectively, the heat transfer route of thermal runaway battery cell has been increased, the heat transfer efficiency of thermal runaway battery cell has been improved, and then the security performance of battery package and new energy electric automobile has been improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:

fig. 1 is a schematic structural diagram of a battery cell structure provided in an embodiment of the present application;

FIG. 2 is an exploded view of the structure shown in FIG. 1;

fig. 3 is an exploded view of a cell structure according to another embodiment of the present application.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.

Referring to fig. 1-2, the present application provides a battery cell structure 100 configured in a battery pack of a new energy electric vehicle. The cell structure 100 includes a plurality of cells 110 arranged along a first direction, and a heat conducting structure 120 is disposed between two adjacent cells 110, and heat is transferred between two adjacent cells 110 through the heat conducting structure 120. The heat conducting structure 120 comprises two heat conducting layers and a heat insulating layer 123, the heat insulating layer 123 is arranged between the two heat conducting layers, and the two heat conducting layers are provided with contact ends 126 for contacting with the heat radiating surfaces of the battery pack. The two heat conducting layers may be a first heat conducting layer 121 and a second heat conducting layer 122, where the first heat conducting layer 121 is attached to the adjacent cell 110, the second heat conducting layer 122 is attached to the adjacent cell 110, and two side surfaces of the heat insulating layer 123 are attached to the first heat conducting layer 121 and the second heat conducting layer 122 respectively. At least one of the first and second heat

conductive layers

121 and 122 is provided with a heat conductive connection portion, and the first and second heat

conductive layers

121 and 122 are in heat conductive contact through the heat conductive connection portion.

When a thermal runaway condition occurs in a certain cell 110, the heat conducting structure 120 can transfer part of the heat of the thermal runaway cell 110, so as to improve the heat transfer efficiency of the thermal runaway cell 110. Specifically: a portion of the heat of the thermal runaway battery is thermally transferred to the thermally conductive layer adjacent thereto, which on the one hand transfers a majority of the heat of the portion to the cooling surface in the battery pack, and on the other hand transfers the remaining heat of the portion to the other thermally conductive layer and the cells 110 adjacent thereto via the thermally conductive connection. Through setting up foretell heat conduction connecting portion, increased the heat transfer route of thermal runaway electric core 110, improved thermal runaway electric core 110's heat transfer efficiency for thermal runaway electric core 110's heat dissipation, and then improved the security performance of battery package and new forms of energy electric automobile.

It can be appreciated that when part of the heat of the thermal runaway cell 110 is transferred to the adjacent cell 110 by the heat conducting structure 120, the heat transferred to the two heat conducting layers is absorbed by the heat dissipation surface of the battery pack, so that the heat transferred to the adjacent cell 110 by the heat conducting structure 120 is only a small part of the heat received from the thermal runaway cell 110, and the heat transferred to the adjacent cell 110 by the heat conducting structure 120 is quickly dissipated on the adjacent cell 110, so that the safety of the adjacent cell 110 is not affected.

The heat conducting layer and the battery cells 110 and the heat conducting layer and the heat insulating layer 123 may be adhered together by heat conducting glue, or the heat conducting structure 120 may be clamped between two adjacent battery cells 110.

In some embodiments of the present application, the two heat conducting layers include a first heat conducting layer 121 and a second heat conducting layer 122, the first heat conducting layer 121 includes a layer body 127 and a first extension portion 124, the heat insulating layer 123 is disposed between the layer body 127 and the second heat conducting layer 122, and the first extension portion 124 is disposed on one side of the layer body 127 close to the second heat conducting layer 122 and is located on an outer peripheral side of the heat insulating layer 123, that is, the first extension portion 124 is located between the layer body 127 and the second heat conducting layer 122. The first extension portion 124 extends from the layer body 127 toward the second heat conductive layer 122 and is in heat conductive contact with the second heat conductive layer 122, wherein the first extension portion 124 forms a heat conductive connection portion. By providing the first extension portion 124 on the first heat conductive layer 121 to form the heat conductive connection portion, the heat conductive structure 120 can be simplified, and the assembly efficiency of the cell structure 100 can be improved.

Wherein the first extension 124 may be disposed at one side of the layer body 127; or the first extension 124 may be provided on several sides of the layer body 127.

The cross-sectional area of the first extension portion 124 along the first direction gradually increases, which helps to improve the heat dissipation efficiency of the heat conduction layer away from the thermal runaway cell 110. Preferably, the side surface of the first extension portion 124 adjacent to the insulating layer 123 is disposed in an inclined plane, and is disposed in an inclined direction toward the insulating layer 123 along the first direction.

With continued reference to fig. 1-2, in some embodiments of the present application, the first extension portion 124 is an annular structure and is disposed on an outer periphery of the layer body 127, a mounting cavity is formed between the first extension portion 124 and the layer body 127, and the heat insulation layer 123 is mounted in the mounting cavity. So set up, can improve the assembly efficiency and the assembly precision of heat conduction structure 120 through the position of installation cavity location insulating layer 123.

The first heat conductive layer 121 and the second heat conductive layer 122 may be, but not limited to, an integral structure therebetween to further simplify the heat conductive structure 120. The first extension 124 has a break 128, and the insulating layer 123 is mounted to the mounting cavity through the break 128. The partition 128 may be, but is not limited to, located at one side of the first extension 124 in the second direction, and the first direction is perpendicular to the second direction, so that the insulation layer 123 is assembled to the installation cavity. The second direction may be, but is not limited to being, parallel to the height direction of the battery cell 110, and the first direction may be, but is not limited to being, parallel to the thickness direction of the battery cell 110.

The first extension 124 also has a contact end 126 to contact the heat dissipation surface of the battery pack through the contact end 126.

Referring to fig. 3, in some embodiments of the present application, a parallel implementation of the heat conducting structure 120 in the above embodiments is given, specifically: the two heat conduction layers comprise a first heat conduction layer 121 and a second heat conduction layer 122, the first heat conduction layer 121 comprises a layer body 127 and a second extension portion 125, the heat insulation layer 123 is arranged between the layer body 127 and the second heat conduction layer 122, the second extension portion 125 is arranged on one side of the layer body 127, which is close to the second heat conduction layer 122, and is located on the outer periphery side of the heat insulation layer 123, the heat insulation layer 123 is provided with a mounting through hole 129 penetrating along the first direction, the second extension portion 125 extends from the layer body 127 towards the second heat conduction layer 122, penetrates through the mounting through hole 129 and is in heat conduction contact with the second heat conduction layer 122, and the second extension portion 125 forms a heat conduction connecting portion.

It will be appreciated that most of the heat transferred to the heat conducting layer through the second extension 125 is absorbed by the heat dissipation surface, the rest of the heat is transferred to the cell 110 adjacent to the thermal runaway cell 110, and the heat transferred to the adjacent cell 110 by the heat conducting structure 120 is quickly dissipated on the adjacent cell 110, so that the safety of the adjacent cell 110 is not affected.

Among them, the mounting through hole 129 is preferably in a straight circular hole shape.

The number of the mounting through holes 129 and the number of the second extending portions 125 are all a plurality, and the plurality of the second extending portions 125 are correspondingly arranged on the plurality of mounting through holes 129 in a penetrating manner.

Wherein the shape of the mounting through hole 129 and the second extension 125 are adapted to achieve positioning of the insulation layer 123.

The second extension portion 125 and the second heat conductive layer 122 may be bonded by a heat conductive adhesive.

In some embodiments of the present application, the material of the heat conducting layer may be, but not limited to, a heat conducting ceramic sheet, a graphite sheet, a heat conducting silicon sheet, etc., and the material of the heat insulating layer 123 may be, but not limited to.

The embodiment of the present application further provides a battery pack, including the heat dissipation surface and the battery cell structure 100 of the foregoing embodiment, where the contact end 126 of the heat conducting layer contacts the heat dissipation surface.

The battery pack comprises a tray, a heat radiating device is arranged at the bottom of the tray, the heat radiating device can be but not limited to a liquid cooling device, a bearing surface is arranged in an installation cavity of the tray, and the liquid cooling device can exchange heat to the bearing surface so that the bearing surface forms a heat radiating surface. The cell structure 100 is mounted above the carrying surface of the tray and the contact ends 126 of the first thermally conductive layer 121 and the second thermally conductive layer 122 are both in contact with the cooling surface.

The embodiment of the application also provides a new energy electric automobile, which comprises the battery pack of the embodiment.

It is to be understood that the above references to the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are for convenience in describing the present utility model and simplifying the description only, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is three or more.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. The utility model provides a battery cell structure, its characterized in that, includes a plurality of battery cells of arranging the setting along first direction, and adjacent two be equipped with heat conduction structure between the battery cell, heat conduction structure includes two heat conduction layers and insulating layer, two heat conduction layers all have the contact end that is used for with the heat dissipation face contact of battery package, the insulating layer set up in between two heat conduction layers, at least one of two heat conduction layers is equipped with heat conduction connecting portion, just pass through between two heat conduction layers heat conduction connecting portion heat conduction contact.

2. The electrical core structure according to claim 1, wherein the two heat conductive layers comprise a first heat conductive layer and a second heat conductive layer, the first heat conductive layer comprises a layer body and a first extension portion, the heat insulating layer is disposed between the layer body and the second heat conductive layer, the first extension portion is disposed on a side of the layer body close to the second heat conductive layer and on an outer peripheral side of the heat insulating layer, and the first extension portion extends from the layer body toward the second heat conductive layer and is in heat conductive contact with the second heat conductive layer, wherein the first extension portion forms the heat conductive connection portion.

3. The cell structure of claim 2, wherein the first extension portion is an annular structure and is disposed at an outer periphery of the layer body, a mounting cavity is formed between the first extension portion and the layer body, and the heat insulating layer is mounted in the mounting cavity.

4. The cell structure of claim 3, wherein the first and second thermally conductive layers are integrally formed, the first extension has a partition, and the thermal insulating layer is mounted to the mounting cavity through the partition.

5. The cell structure of claim 4, wherein the partition is located on a side of the first extension in a second direction, the first direction being perpendicular to the second direction.

6. The electrical core structure according to claim 1, wherein the two heat conducting layers comprise a first heat conducting layer and a second heat conducting layer, the first heat conducting layer comprises a layer body and a second extending portion, the heat insulating layer is arranged between the layer body and the second heat conducting layer, the second extending portion is arranged on one side of the layer body close to the second heat conducting layer and is located on the outer peripheral side of the heat insulating layer, the heat insulating layer is provided with a mounting through hole penetrating along the first direction, the second extending portion extends from the layer body towards the second heat conducting layer, penetrates through the mounting through hole and is in heat conducting contact with the second heat conducting layer, and the second extending portion forms the heat conducting connecting portion.

7. The electrical core structure according to claim 6, wherein the number of the mounting through holes and the number of the second extending portions are all a plurality, and the plurality of the second extending portions are correspondingly arranged through the plurality of the mounting through holes.

8. The cell structure of claim 6, wherein the mounting through-hole and the second extension are shaped to fit.

9. A battery pack comprising the cell structure of any one of claims 1-8.

10. A new energy electric vehicle, characterized by comprising the battery pack according to claim 9.