CN216529210U

CN216529210U - Insulating cover plate of lithium battery

Info

Publication number: CN216529210U
Application number: CN202122593340.8U
Authority: CN
Inventors: 高翔; 杨林义
Original assignee: Suzhou Energy Si Electrical Material Co ltd
Current assignee: Suzhou Energy Si Electrical Material Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-05-13
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses an insulating cover plate of a lithium battery, and relates to the technical field of lithium batteries. The heat-conducting plate comprises a first insulating heat-conducting plate layer and a second insulating heat-conducting plate layer which are positioned on two sides and arranged in parallel, wherein an insulating plate is arranged between the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer; a heat pipe is arranged between the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer; filling materials are filled between the heat insulation plate and the first insulating heat conduction plate layer, between the heat insulation plate and the second insulating heat conduction plate layer which are positioned on the peripheral side of the heat pipe; the filling material is foam. According to the utility model, the second insulating heat-conducting plate layer, the first insulating heat-conducting plate layer, the heat insulation plate and the heat pipe are adopted, and the heat pipe is used for transferring and dissipating heat, so that the heat dissipation effect of the insulating cover plate of the lithium battery is improved on the premise of insulation.

Description

Insulating cover plate of lithium battery

Technical Field

The utility model belongs to the technical field of lithium batteries, and particularly relates to an insulating cover plate of a lithium battery.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution using lithium metal or a lithium alloy as a positive/negative electrode material, and can be roughly classified into two types: lithium metal batteries and lithium ion batteries, the lithium ion batteries do not contain metallic lithium and can be charged, the fifth generation products of rechargeable batteries, namely the lithium metal batteries, are produced in 1996, and the safety, the specific capacity, the self-discharge rate and the cost performance of the rechargeable batteries are all superior to those of the lithium ion batteries.

Chinese patent No. CN201810269968.2 provides a new forms of energy lithium cell apron, including the apron, the through-hole has all been seted up to the base face of apron, and the bottom of apron all is seted up flutedly, and the inside of recess is equipped with the spring, and the inner wall of through-hole is equipped with the buckle, buckle fixedly connected with baffle, and the buckle is connected with the lithium cell, and the apron is including first plywood. According to the utility model, the glass fiber penetrates through the first layer plate, the second layer plate and the bottom layer plate, the bottom of the fiber opening cloth A is connected with the second layer plate, and the fiber opening cloth B is covered at the bottom of the second layer plate, so that the strength and toughness of the cover plate are improved, the explosion-proof characteristic is realized, and the use is very safe; the lithium battery is positioned on the base surface of the cover plate, so that complex assembly is reduced, the structure is extremely simple, and the assembly time is saved.

But this apron design only simple fixed action and certain explosion-proof characteristic do not have other effects, and the battery has partly electric energy conversion to heat energy in constantly using process, need carry out timely processing, otherwise can influence the performance of battery, and this apron structure extremely and do not have the heat dissipation function.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an insulating cover plate of a lithium battery, which solves the problems of poor structure and poor heat dissipation effect of the existing lithium battery cover plate by adopting a second insulating heat-conducting plate layer, a first insulating heat-conducting plate layer, a heat-insulating plate and a heat pipe.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to an insulating cover plate of a lithium battery, which comprises a first insulating heat-conducting plate layer and a second insulating heat-conducting plate layer which are positioned on two sides and arranged in parallel, wherein an insulating plate is arranged between the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer; a heat pipe is arranged between the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer; filling materials are filled between the heat insulation plate and the first insulating heat-conducting plate layer, between the heat insulation plate and the second insulating heat-conducting plate layer which are positioned on the peripheral side of the heat pipe; the filling material is foam.

Furthermore, the heat pipes comprise a plurality of first heat pipes arranged in parallel and a plurality of second heat pipes arranged in parallel; the second heat pipes and the first heat pipes are parallel in length direction and are arranged alternately; the heat pipe comprises a penetrating section penetrating through the heat insulation plate, and the penetrating section is respectively communicated with a first heat dissipation section and a second heat dissipation section.

Furthermore, the bottom side surface of the first heat dissipation section is in contact with the upper surface of the second insulating heat-conducting plate layer, and the upper surface of the second heat dissipation section is in contact with the bottom side surface of the first insulating heat-conducting plate layer.

Further, the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer have the same structure; the heat pipe comprises a heat pipe body and a heat conducting layer, wherein the heat pipe body comprises a heat conducting layer and a heat conducting layer; the insulating heat conduction layer is composed of 30% of epoxy resin and 70% of heat conduction filler powder.

Further, the insulation board is formed by alternately stacking a plurality of aluminum film layers and a plurality of glass fiber felt layers.

The sealing frame comprises a rectangular frame body, a connecting part protruding inwards is arranged on the inner peripheral side wall of the rectangular frame body, the connecting part is located between the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer, and two sides of the connecting part are respectively abutted to the first insulating heat-conducting plate layer and the second insulating heat-conducting plate layer; and a cross-linking agent connecting layer is arranged between the connecting part and the first insulating heat-conducting plate layer and between the connecting part and the second insulating heat-conducting plate layer.

The utility model has the following beneficial effects:

according to the utility model, the second insulating heat-conducting plate layer, the first insulating heat-conducting plate layer, the heat insulation plate and the heat pipe are adopted, and the heat pipe is used for transferring and dissipating heat, so that the heat dissipation effect of the insulating cover plate of the lithium battery is improved on the premise of insulation.

Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an insulating cover plate structure of a lithium battery according to the present invention;

FIG. 2 is a schematic diagram of a partial structure of an insulating cover plate of a lithium battery according to the present invention;

FIG. 3 is a schematic view of a sealing frame structure according to the present invention;

FIG. 4 is a schematic structural view of a first insulating heat-conducting plate layer of the present invention;

FIG. 5 is a schematic structural view of the insulation sheeting of the present invention;

FIG. 6 is a schematic view of a heat pipe structure according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1 to 6, the present invention is an insulating cover plate for a lithium battery, including a sealing frame 5, and a first insulating heat conducting plate layer 1 and a second insulating heat conducting plate layer 3 disposed in parallel at two sides, wherein an insulating plate 2 is disposed between the first insulating heat conducting plate layer 1 and the second insulating heat conducting plate layer 3; a heat pipe 4 is arranged between the first insulating heat-conducting plate layer 1 and the second insulating heat-conducting plate layer 3; the sealing frame 5 comprises a rectangular frame body 51, the inner peripheral side wall of the rectangular frame body 51 is provided with a connecting part 52 protruding inwards, the connecting part 52 is positioned between the first insulating heat-conducting plate layer 1 and the second insulating heat-conducting plate layer 3, and two sides of the connecting part 52 are respectively abutted against the first insulating heat-conducting plate layer 1 and the second insulating heat-conducting plate layer 3; filling materials are filled among the heat insulation plate 2, the first insulating heat conduction plate layer 1, the heat insulation plate 2 and the second insulating heat conduction plate layer 3, wherein cross-linking agent connecting layers are arranged among the connecting part 52, the first insulating heat conduction plate layer 1 and the second insulating heat conduction plate layer 3 and are positioned on the peripheral side of the heat pipe 4; the filling material is foam. With the arrangement of the heat pipe 4, heat is transferred through the heat pipe 4 to improve the heat dissipation effect.

As shown in fig. 6, the heat pipe 4 includes a plurality of first heat pipes arranged in parallel and a plurality of second heat pipes arranged in parallel; the length directions of the second heat pipes and the first heat pipes are parallel and are arranged alternately; the heat pipe 4 comprises a penetrating section 41 penetrating through the heat insulation plate 2, and a first heat dissipation section 42 and a second heat dissipation section 43 are respectively communicated with the penetrating section 41; the bottom side surface of the first heat dissipation section 42 is in contact with the upper surface of the second insulating heat-conducting plate layer 3, and the upper surface of the second heat dissipation section 43 is in contact with the bottom side surface of the first insulating heat-conducting plate layer 1.

As shown in fig. 4, the first insulating heat conducting plate layer 1 and the second insulating heat conducting plate layer 3 have the same structure; the heat pipe comprises a copper plate layer 101 positioned in the middle, an insulating heat conduction layer 102 is arranged on one side of the copper plate layer 101 close to the heat pipe 4, and an aluminum substrate layer 103 is arranged on the other side of the copper plate layer 101; the insulating heat conduction layer 102 is composed of 30% of epoxy resin and 70% of heat conduction filler powder; through the setting of insulating heat conduction sheet layer one 1 and insulating heat conduction sheet layer two 3, make things convenient for in heat transfer to heat pipe 4 in the battery, be convenient for simultaneously in heat pipe 4 heat transfer to insulating heat conduction sheet layer two 3.

As shown in fig. 5, the insulation panel 2 is formed by alternately stacking a plurality of aluminum film layers 21 and a plurality of glass fiber mat layers 22. Improve insulating effect simultaneously, improve structural strength.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides an insulating apron of lithium cell which characterized in that: the heat insulation plate comprises a first insulation heat conduction plate layer (1) and a second insulation heat conduction plate layer (3) which are arranged on two sides in parallel, and a heat insulation plate (2) is arranged between the first insulation heat conduction plate layer (1) and the second insulation heat conduction plate layer (3);

a heat pipe (4) is arranged between the first insulating heat-conducting plate layer (1) and the second insulating heat-conducting plate layer (3);

and filling materials are filled between the heat insulation plate (2) and the first insulating heat-conducting plate layer (1) which are positioned on the peripheral side of the heat pipe (4), and between the heat insulation plate (2) and the second insulating heat-conducting plate layer (3).

2. The lithium battery insulating cover plate according to claim 1, characterized in that the heat pipes (4) comprise a plurality of first heat pipes arranged in parallel and a plurality of second heat pipes arranged in parallel; the second heat pipes and the first heat pipes are parallel in length direction and are arranged alternately.

3. The lithium battery insulating cover plate according to claim 1, wherein the heat pipe (4) comprises a penetrating section (41) penetrating through the insulating plate (2), and the penetrating section (41) is respectively communicated with the first heat dissipation section (42) and the second heat dissipation section (43).

4. The insulating cover plate for the lithium battery as claimed in claim 3, wherein the bottom side of the first heat dissipation section (42) is in contact with the upper surface of the second insulating and heat conducting plate layer (3), and the upper surface of the second heat dissipation section (43) is in contact with the bottom side of the first insulating and heat conducting plate layer (1).

5. The insulating cover plate for the lithium battery as claimed in claim 1, wherein the first insulating heat-conducting plate layer (1) and the second insulating heat-conducting plate layer (3) are identical in structure; all including being located copper plate layer (101) in the middle of being located, copper plate layer (101) be close to one side of heat pipe (4) is provided with insulating heat-conducting layer (102), the opposite side of copper plate layer (101) is provided with aluminium base plate layer (103).

6. The insulation cover plate for lithium batteries according to claim 1, wherein the insulation plate (2) is formed by alternately stacking a plurality of aluminum film layers (21) and a plurality of glass fiber felt layers (22).

7. The insulating cover sheet for lithium batteries according to claim 1, wherein said filling material is foam.

8. The insulating cover plate for the lithium battery according to claim 1, further comprising a sealing frame (5), wherein the sealing frame (5) comprises a rectangular frame body (51), the inner peripheral wall of the rectangular frame body (51) is provided with a connecting portion (52) protruding towards the inner side, the connecting portion (52) is located between the first insulating and heat-conducting plate layer (1) and the second insulating and heat-conducting plate layer (3), and two sides of the connecting portion (52) abut against the first insulating and heat-conducting plate layer (1) and the second insulating and heat-conducting plate layer (3), respectively.

9. The insulating cover plate for the lithium battery as claimed in claim 8, wherein a cross-linking agent connecting layer is arranged between the connecting portion (52) and the first insulating heat-conducting plate layer (1) and the second insulating heat-conducting plate layer (3).