CN212517371U

CN212517371U - Soft-packaged electrical core module and heat radiation structure thereof

Info

Publication number: CN212517371U
Application number: CN202021054623.4U
Authority: CN
Inventors: 陈汉斌; 潘文武
Original assignee: Shenzhen Times Energy Technology Co ltd
Current assignee: Shenzhen Times Energy Technology Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-02-09
Anticipated expiration: 2030-06-10

Abstract

The application discloses soft-packaged battery cell module and heat radiation structure thereof, including two a kind of frames and at least one two kinds of frames. The first frame body comprises a first frame body and a first radiating fin, and a first bulge part is arranged on one side, facing the second frame body, of the first frame body. The middle part of the first frame body is provided with a first opening in an area which is used for being contacted with the battery cell, and one side of the first opening facing the second-class frame is covered with a first cooling fin. The second type of frame comprises a second frame body and second cooling fins, wherein second protruding portions are arranged on two sides of the second frame body, and the second protruding portions are enclosed by the first protruding portions of the adjacent first frame body and/or the second protruding portions of the second frame body to form accommodating cavities. The middle part of the second frame body is provided with a second opening in the area which is used for being in contact with the battery cell, the two sides of the second opening are covered with second cooling fins, and a cooling gap is formed between the two second cooling fins on the two sides of the second opening.

Description

Soft-packaged electrical core module and heat radiation structure thereof

Technical Field

The application relates to the technical field of lithium ion batteries, in particular to a soft-package battery cell module and a heat dissipation structure thereof.

Background

The technology of lithium ion batteries has become mature day by day, and soft package battery cores are widely used due to the advantages of lightness, thinness, good safety performance, high energy density and the like. Laminate polymer core can produce a large amount of heats in the use, will cause inside heat gathering if the heat can not in time be dispelled, influences the battery stability, shortens battery life greatly, and the battery can expand gradually because of life with being heated simultaneously, will cause the battery bulge spalling and can't continue to use if can not effective control. In the existing heat dissipation structure, some battery cores are wrapped in a metal square shell, so that the battery cores are tightly attached to metal sheets, and heat generated by the battery cores is transferred to the metal sheets.

However, when the battery core is used, the plurality of metal square shells are tightly attached layer by layer, an independent heat dissipation space is not provided, heat is conducted to the metal sheet only, the heat of the metal sheet cannot be taken away in time, and the heat dissipation effect is poor, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

The application provides a soft-packaged battery cell module and a heat radiation structure thereof for solve the poor problem of current heat radiation structure radiating effect.

The heat dissipation structure of the soft package battery cell module comprises two first-class frames and at least one second-class frame, wherein the two first-class frames are respectively positioned on the front side and the back side of the heat dissipation structure, and the second-class frame is positioned in the middle of the heat dissipation structure;

the first frame body comprises a first protruding portion on one side facing the second frame body, a first opening is formed in the middle of the first frame body and used for being in contact with the battery cell, a first radiating fin covers one side of the first opening facing the second frame body, and the first radiating fin is used for being in contact with the battery cell;

the second-class frame comprises a second frame body and second radiating fins, wherein second protruding portions are arranged on two sides of the second frame body, the second protruding portions and first protruding portions of adjacent first frame bodies and/or second protruding portions of the second frame bodies are enclosed to form a containing cavity, the containing cavity is used for containing the battery cell, a second opening is formed in the area, in contact with the battery cell, of the middle of the second frame body, the second radiating fins cover two sides of the second opening, a radiating gap is formed between the two second radiating fins on two sides of the second opening, the radiating gap is used for air circulation, and the second radiating fins are used for being in contact with the battery cell.

As a further improvement of the heat dissipation structure, two opposite sides of the second frame body are provided with through gas channels, and the gas channels are communicated with the heat dissipation gaps.

As a further improvement of the heat dissipation structure, one surface of the first frame body facing the first heat sink is provided with a first raised bearing portion, one side of the first bearing portion facing the second frame body is connected with the first heat sink, one surface of the second frame body facing the second heat sink is provided with a second raised bearing portion, and two opposite sides of the second bearing portion are respectively connected with one second heat sink.

As a further improvement of the heat dissipation structure, an elastic member is arranged in the heat dissipation gap.

As a further improvement of the heat dissipation structure, the elastic piece comprises extrusion foam, and the extrusion foam is arranged along the direction of gas passing through the heat dissipation gap.

As a further improvement of the heat dissipation structure, the first frame body and the second frame body have a fastening structure, and the fastening structure includes a fastening protrusion and/or a fastening groove.

As a further improvement of the heat dissipation structure, the first frame body and the second frame body have hollow structures.

As a further improvement of the heat dissipation structure, a reinforcing plate is arranged in the hollow structure.

As a further improvement of the heat dissipation structure, the first and second heat dissipation fins include aluminum sheets.

The application provides a soft-packaged battery cell module, include as above-mentioned arbitrary item heat radiation structure and electric core, electric core sets up in heat radiation structure's the cavity that holds.

The beneficial effect of this application:

the application provides a soft-packaged battery cell module and heat radiation structure thereof, including two a kind of frames and at least one two kinds of frames, two a kind of frames are located heat radiation structure's tow sides respectively, and two kinds of frames are located heat radiation structure's centre. The first frame body comprises a first frame body and a first radiating fin, and a first bulge part is arranged on one side, facing the second frame body, of the first frame body. The middle part of the first frame body is provided with a first opening in an area which is used for being in contact with the battery cell, one side of the first opening facing the second frame body is covered with a first cooling fin, and the first cooling fin is used for being in contact with the battery cell. The second frame comprises a second frame body and second cooling fins, second protruding portions are arranged on two sides of the second frame body, the second protruding portions and the first protruding portions of the adjacent first frame body and/or the second protruding portions of the second frame body are enclosed to form an accommodating cavity, and the accommodating cavity is used for accommodating the battery cell. The middle part of the second frame body is used for being provided with a second opening in an area contacted with the battery cell, two sides of the second opening are covered with second radiating fins, a radiating gap is formed between the two second radiating fins on two sides of the second opening, the radiating gap is used for gas circulation, and the second radiating fins are used for being contacted with the battery cell. Because the heat dissipation gap is additionally arranged between the two second heat dissipation fins, the air flow circulating the heat dissipation gap can take away the heat of the second heat dissipation fins, and the heat dissipation effect of the heat dissipation structure is improved.

Drawings

Fig. 1 is a schematic structural diagram of a soft-package battery cell module in an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a soft-package cell module in an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a class II frame according to an embodiment of the present application;

FIG. 4 is a cross-sectional view of one type of frame in one embodiment of the present application.

Reference numerals:

100. a type of frame; 110. a first frame body; 111. a first boss portion; 112. a first bearing part; 120. a first heat sink; 200. a second type frame; 210. a second frame body; 211. a second boss portion; 212. a gas channel; 213. a reinforcing plate; 214. a second bearing part; 220. a second heat sink; 300. a heat dissipation gap; 400. a snap-fit structure; 500. an electric core; 600. and extruding the foam.

Detailed Description

The present application is described in further detail in the following detailed description of the preferred embodiments with reference to the figures, in which like elements in different embodiments are numbered with like associated element numbers. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The embodiment provides a soft-packaged electrical core module.

Referring to fig. 1 and 2, the flexible-package battery cell module includes a heat dissipation structure and a battery cell 500, and the battery cell 500 is disposed in a cavity of the heat dissipation structure.

On the other hand, this embodiment provides a heat radiation structure, and this heat radiation structure is applied to above-mentioned soft-packaged electrical core module.

Referring to fig. 1 and 2, the heat dissipation structure includes two first-type frames 100 and at least one second-type frame 200.

Referring to fig. 1-4, two first-type frames 100 are respectively disposed on the front and back sides of the heat dissipation structure, and a second-type frame 200 is disposed in the middle of the heat dissipation structure. The first frame 100 includes a first frame body 110 and a first heat sink 120, where a side of the first frame body 110 facing the second frame 200 has a first protrusion 111, a middle area of the first frame body 110 for contacting the battery cell 500 has a first opening, a side of the first opening facing the second frame 200 is covered with the first heat sink 120, and the first heat sink 120 is for contacting the battery cell 500. The second-class frame 200 includes a second frame body 210 and a second heat sink 220, the second frame body 210 has second protruding portions 211 on both sides, and the second protruding portions 211 surround the first protruding portions 111 of the adjacent first frame body 110 and/or the second protruding portions 211 of the second frame body 210 to form a receiving cavity, which is used for receiving the battery cell 500. A second opening is formed in an area in the middle of the second frame 210, where the area is used for contacting the battery cell 500, second heat dissipation fins 220 are covered on both sides of the second opening, a heat dissipation gap 300 is formed between the two second heat dissipation fins 220 on both sides of the second opening, the heat dissipation gap 300 is used for gas circulation, and the second heat dissipation fins 220 are used for contacting the battery cell 500.

Because the heat dissipation gap 300 is additionally arranged between the two second heat dissipation fins 220, when the battery cell 500 generates heat, the heat can be rapidly transmitted to the second heat dissipation fins 220 tightly attached to the battery cell through contact conduction, the second heat dissipation fins 220 can rapidly dissipate the heat to the through heat dissipation gap 300, the airflow can freely flow through the heat dissipation gap 300, the heat can be rapidly taken away, and the heat dissipation effect of the heat dissipation structure is improved. For the battery cell 500 contacting with the first heat sink 120, the heat at the side where the battery cell 500 contacts with the first heat sink 120 can be transferred to the first heat sink 120, and then dissipated to the outside through the first heat sink 120. The heat dissipation through the first heat dissipation fin 120 and the second heat dissipation fin 220 is also beneficial to ensure that the heat dissipation of the battery cell 500 is uniform. In this embodiment, the battery cell 500 can dissipate heat from both sides of the heat dissipation structure, which is also beneficial to improving the heat dissipation effect.

Specifically, a heat dissipation structure capable of accommodating N battery cells 500 includes two first-type frames 100 and N-1 second-type frames 200, where N is greater than or equal to 2, and N is a positive integer. The cell 500 may be a soft-packed cell 500, including but not limited to a co-lateral tab. The cells 500 may be connected in series or in parallel.

Referring to fig. 1 and 2, in an embodiment, two opposite sides of the second frame 210 are opened with a through gas channel 212, and the gas channel 212 is communicated with the heat dissipation gap 300.

During heat dissipation, the airflow can flow into the heat dissipation gap 300 through the air channel 212 on one side of the second frame 210, and then flow out of the heat dissipation gap 300 through the air channel 212 on the other side of the second frame 210, so as to take away heat of the second heat sink 220 on both sides of the heat dissipation gap 300, thereby improving the heat dissipation effect of the heat dissipation structure.

Referring to fig. 2-4, in an embodiment, a surface of the first frame 110 facing the first heat sink 120 is provided with a first bearing portion 112 protruding, a side of the first bearing portion 112 facing the second frame 210 is connected to the first heat sink 120, a surface of the second frame 210 facing the second heat sink 220 is provided with a second bearing portion 214 protruding, and two opposite sides of the second bearing portion 214 are respectively connected to one second heat sink 220. The first heat sink 120 is carried by the first carrying portion 112, and the second heat sink 220 is carried by the second carrying portion 214, and in particular, the first heat sink 120 and the second heat sink 220 can be connected to the first carrying portion 112 and the second carrying portion 214 by bonding, screwing, or other suitable connection methods.

Specifically, the first frame body 110 and the second frame body 210 may be made of a plastic material, the plastic material has the advantages of light weight and insulation, the first frame body 110 and the second frame body 210 can block connection of two heat dissipation aluminum sheets (including the first heat dissipation fins 120 and the second heat dissipation fins 220), so as to achieve a good insulation protection effect, and the cross sections of the first frame body 110 and the second frame body 210 may be "T" shaped.

Referring to fig. 2 and 3, in an embodiment, the heat dissipation gap 300 is provided with an elastic member therein. Electric core 500 may expand in the use process, and the elastic component can effectively absorb the expansion of electric core 500, and the elastic force of elastic component can keep fin and electric core 500 closely to laminate, can not only effectively dispel the heat but also prevent electric core 500 from breaking because of the internal pressure is too high, has promoted the security of battery use

Referring to fig. 2 and 3, in one embodiment, the elastic member includes a pressing foam 600, and the pressing foam 600 is disposed along a direction in which the gas passes through the heat dissipation gap 300. The extruded foam 600 has the advantages of good heat resistance and good resilience, and is suitable for being used as an elastic element placed in the heat dissipation gap 300. In other embodiments, other elastic members with good heat resistance and elasticity can be used as the elastic member.

Referring to fig. 4, in an embodiment, the first frame body 110 and the second frame body 210 have a fastening structure 400, and the fastening structure 400 includes a fastening protrusion and/or a fastening groove. The snap structure 400 can be used to quickly position and detachably connect the first frame 110 and the second frame 210.

Referring to fig. 3 and 4, in an embodiment, the first frame body 110 and the second frame body 210 have a hollow structure. The hollow structure can reduce the material used by the first frame body 110 and the second frame body 210, save the material and reduce the material cost.

Referring to fig. 3 and 4, in one embodiment, a reinforcing plate 213 is disposed inside the hollow structure. The reinforcing plate 213 enhances the structural strength of the hollow structure.

Referring to fig. 3 and 4, in one embodiment, the first heat sink 120 and the second heat sink 220 comprise aluminum sheets. Aluminum has good thermal conductivity and is suitable as a material for the first fin 120 and the second fin 220, and specifically, an aluminum plate material of about 1.0 can be used. The first heat sink 120 and the second heat sink 220 may be heat sinks having the same material and structure.

The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the inventive concepts herein.

Claims

1. The heat dissipation structure of the soft package battery cell module is characterized by comprising two first-class frames and at least one second-class frame, wherein the two first-class frames are respectively positioned on the front side and the back side of the heat dissipation structure, and the second-class frames are positioned in the middle of the heat dissipation structure;

2. The heat dissipation structure of claim 1, wherein the second frame body has two opposite sides provided with a through gas channel, and the gas channel is communicated with the heat dissipation gap.

3. The heat dissipating structure of claim 1, wherein a first bearing portion is provided on a surface of the first frame facing the first heat sink, one side of the first bearing portion facing the second frame is connected to the first heat sink, a second bearing portion is provided on a surface of the second frame facing the second heat sink, and two opposite sides of the second bearing portion are connected to one second heat sink.

4. The heat dissipating structure of claim 1, wherein an elastic member is disposed in the heat dissipating gap.

5. The heat dissipating structure of claim 4, wherein said resilient member comprises extruded foam disposed in a direction of gas passage through the heat dissipating gap.

6. The heat dissipation structure of any one of claims 1 to 5, wherein the first frame body and the second frame body have a snap-fit structure, and the snap-fit structure includes a snap-fit protrusion and/or a snap-fit groove.

7. The heat dissipation structure of any one of claims 1 to 5, wherein the first frame body and the second frame body have a hollow structure.

8. The heat dissipating structure of claim 7, wherein a reinforcing plate is disposed inside the hollowed-out structure.

9. The heat dissipation structure of any one of claims 1-5, wherein the first and second fins comprise aluminum sheets.

10. A soft-package battery cell module with a heat dissipation structure, which is characterized by comprising the heat dissipation structure and the battery cell as claimed in any one of claims 1 to 9, wherein the battery cell is arranged in a containing cavity of the heat dissipation structure.