CN210723280U

CN210723280U - Heat conduction insulation board and battery module

Info

Publication number: CN210723280U
Application number: CN201921096175.1U
Authority: CN
Inventors: 顾江娜; 岳帅; 殷玉婷; 许玉林; 李相哲
Original assignee: Suzhou Ankao Energy Co Ltd
Current assignee: Suzhou Ankao Energy Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-06-09
Anticipated expiration: 2029-07-12

Abstract

The application discloses heat conduction insulation board and battery module, heat conduction insulation board includes: the supporting layer is made of insulating materials and is respectively attached to and covered on two layers of insulating heat-conducting films at two deviated sides of the supporting layer; the supporting layer is provided with a plurality of through holes distributed in a matrix shape, and each through hole is filled with heat-conducting silica gel clamped between the two layers of insulating heat-conducting films. This kind of insulating heat-conducting plate of this application has excellent heat conduction and insulating protection performance, can play effects such as wear-resisting, resistant tearing at battery package vibration process, eliminates battery package safety problems such as short circuit, thermal runaway that probably appear when the circumstances such as acceleration, deceleration, impact, collision in the operation process.

Description

Heat conduction insulation board and battery module

Technical Field

The application relates to a heat conduction insulation plate and a battery module.

Background

Under the dual pressure drive of emission regulations and energy consumption, "motorization" has become an undisputed inevitable trend in the global automobile industry. Meanwhile, the method also brings a brand new development opportunity under the background of energy revolution brought by the automobile industry in China. However, today, the domestic new energy automobile industry is still in a continuous optimization and exploration stage.

From the technical point of view, a lithium ion battery is the most suitable energy for replacing gasoline at the present stage, the biggest difference between a new energy automobile and a traditional automobile lies in the innovation of a power system, a power battery pack is the core component of the new energy automobile, and the battery pack mainly comprises a battery box and a battery module accommodated in the battery box, wherein the battery module is the core component of the battery pack.

Market launch and ease of rapid charging place ever higher demands on thermal management of batteries. Liquid cooling is currently the most widely used, developed to date. As is well known, the battery is a charged body, and the heat generated by the battery is taken away by using an aluminum liquid cooling plate. The insulating layer is mostly made of silicon sheets and other materials, and the materials have the defects of slightly low tensile strength and breaking strength, poor wear resistance and easy breakage. When the conditions such as acceleration, deceleration, impact and collision occur in the operation process of the battery pack, the silicon sheet is easy to damage, and the safety problems such as short circuit and thermal runaway caused by direct contact of the water cooling plate and the confluence sheet can be caused.

Disclosure of Invention

The purpose of the application is: the utility model provides a heat conduction insulation board of novel structure and the battery module of this kind of insulating heat-conducting plate of configuration, this insulating heat-conducting plate have excellent heat conduction and insulating protective property, can play effects such as wear-resisting, resistant tearing at battery package vibration process, eliminate the battery package and accelerate, slow down, strike, the safety problems such as short circuit, thermal runaway that probably appear when the condition such as collision in the operation.

The technical scheme of the application is as follows:

a thermally conductive insulating panel comprising:

a support layer of insulating material, and

two layers of insulating heat-conducting films respectively attached to and cover two sides, deviating from the supporting layer;

the supporting layer is provided with a plurality of through holes distributed in a matrix shape, and each through hole is filled with heat-conducting silica gel clamped between the two layers of insulating heat-conducting films.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

the supporting layer is a rubber sheet, a ceramic sheet, a PC film, a PVC film or a PET film.

The insulating heat conduction film is a PI film or a silicon adhesive tape.

And the heat-conducting silica gel is in extrusion fit with the hole wall of the hole.

The wall surface of the hole is integrally provided with a plurality of bulges which protrude inwards in the radial direction.

The protrusions are cambered protrusions.

The holes are hexagonal holes or round holes.

A battery module, comprising:

two battery supports which are arranged at intervals from left to right,

a plurality of battery monomers which are arranged between the two battery brackets and are arranged in a matrix shape,

two bus bars respectively arranged on the outer side surfaces of the two battery supports which are deviated from each other, and

the two water cooling plates are respectively arranged on the outer side surfaces of the two bus bars, which are deviated from each other;

the battery support is provided with a plurality of battery jacks distributed in a matrix shape in a run-through manner, the left end and the right end of each battery monomer are respectively inserted into the battery jacks of the two battery supports, and the two confluence pieces are respectively welded and fixed with the left end and the right end of each battery monomer;

the heat conduction insulating plate with the structure is arranged between the water cooling plate and the confluence sheet in a clamping mode, and the holes and the battery jacks are arranged coaxially.

The application has the advantages that:

1. the heat-conducting silica gel in each hole of the heat-conducting insulating plate is just opposite to each battery monomer in the module, so that the heat of the battery monomers can be rapidly transmitted to the water-cooling plate on the outer side.

2. The supporting layer of the heat-conducting insulating plate has certain hardness, is wear-resistant and has a supporting effect. Even if the insulating heat-conducting film on the surface is completely worn and damaged in the vibration, impact and acceleration and deceleration processes, the existence of the supporting layer can well protect the silica gel in the holes from being damaged. Like this, still have the existence of insulating substrate and heat conduction silica gel between water-cooling board and the battery, when guaranteeing safety, can guarantee good contact again, continuously lead away the heat.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, 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 side view of a battery module in an embodiment of the present application;

fig. 2 is an exploded view of a battery module according to an embodiment of the present application;

FIG. 3 is an exploded view of a thermally conductive insulating plate according to an embodiment of the present application;

FIG. 4 is a diagram illustrating the hole pattern of the holes on the support layer according to an embodiment of the present invention;

wherein: the battery comprises a support layer 1, holes 101, protrusions 101a, heat-conducting silica gel 2, a heat-conducting insulating film 3, a battery support 4, a battery jack 401, a battery monomer 5, a current collecting sheet 6 and a water cooling plate 7.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

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).

Fig. 1 to 4 show a preferred embodiment of such a battery module of the present application, which also includes, as in some conventional battery modules: two battery supports 4, numerous cylindrical battery monomer 5, two conflux pieces 6 and two water-cooling boards 7, wherein:

the two battery supports 4 are arranged at intervals from left to right, the battery supports 4 are of an integral injection molding structure, the outer contours of the battery supports are rectangular plate shapes, and a plurality of battery jacks 401 distributed in a matrix shape are arranged on the battery supports 4 in a penetrating mode.

Each battery cell 5 is disposed between the two battery supports 4, and the battery cells 5 are distributed in a matrix shape, the left and right ends of each battery cell 5 are respectively inserted into the battery insertion holes 401 of the two battery supports 4, and each battery cell 5 is supported and fixed by the battery insertion holes 401 of the battery supports 4.

The two confluence pieces 6 are respectively attached to the outer side surfaces of the two battery supports 4 which are deviated from each other, the left confluence piece 6 is welded and fixed with the left end of each battery monomer 5, and the right confluence piece 6 is welded and fixed with the right end of each battery monomer 5. In this embodiment, the left end of each battery cell 5 is a positive terminal, and the right end is a negative terminal, so the bus bars 6 on the left and right sides are respectively a positive bus bar and a negative bus bar.

The two water cooling plates 7 are respectively arranged on the outer side surfaces of the two bus plates, which are deviated from each other, and are used for absorbing heat and reducing temperature of the battery module.

The key improvement of the embodiment is as follows: in order to reduce the possibility of short-circuit accidents and ensure the heat absorption rate of the water cooling plate 7 to the battery module, particularly to each battery cell, a heat conduction insulating plate with a special structure is clamped between the water cooling plate 7 and the bus bar 6. The heat-conducting insulating plate comprises an insulating supporting layer 1 and two layers of insulating heat-conducting films 3 attached to and covering two sides of the supporting layer, wherein the supporting layer 1 is provided with a plurality of holes 101 distributed in a matrix shape in a penetrating mode, the holes 101 of the supporting layer 1 are coaxially arranged with battery jacks 401 of a battery support 4 in a one-to-one correspondence mode, and heat-conducting silica gel 2 clamped between the two layers of insulating heat-conducting films 3 is filled in each hole 101, so that the heat-conducting silica gel 2 in each hole is just opposite to the corresponding battery monomer 5, and heat of the battery monomer 5 is rapidly transmitted to the water-cooling plate 7 on the outer side.

The supporting layer 1 in this embodiment is a rubber sheet with good thermal conductivity and a certain hardness, and certainly, a ceramic sheet may be used, or a PC film, a PVC film, and a PET film with a certain thickness may be used. The supporting layer 1 has certain hardness, is wear-resistant and has a supporting function. Even if the insulating heat-conducting film 3 on the surface is completely worn and damaged in the vibration, impact, acceleration and deceleration processes, the existence of the supporting layer can well protect the silica gel in the holes from being damaged. Like this, still have the existence of insulating substrate and heat conduction silica gel between water-cooling board and the battery, when guaranteeing safety, can guarantee good contact again, continuously lead away the heat.

The insulating heat-conducting film 3 can be PI film or silica gel cloth, and has protection effect on the inner supporting layer 1 and the heat-conducting silica gel 2.

In order to make the connection between the heat conductive silica gel 2 and the support layer 1 more compact, in this embodiment, the heat conductive silica gel 2 is press-fitted with the hole wall of the hole 101 on the support layer 1, and a plurality of protrusions 101a protruding radially inward are integrally formed on the hole wall of the hole 101.

The protrusion 101a is an arc-shaped protrusion.

The holes 101 are hexagonal holes, but it is also possible to use other holes of various shapes such as round holes.

The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims

1. A thermally conductive insulating panel, comprising:

a support layer (1) of insulating material, and

two layers of insulating heat-conducting films (3) which respectively cover two sides of the supporting layer in a clinging manner;

the supporting layer (1) is provided with a plurality of through holes (101) distributed in a matrix shape, and each hole (101) is filled with heat-conducting silica gel (2) clamped between the two layers of insulating heat-conducting films (3).

2. A heat conducting and insulating plate according to claim 1, characterized in that the supporting layer (1) is a rubber sheet, a ceramic sheet, a PC film, a PVC film or a PET film.

3. The heat-conducting and insulating plate according to claim 1, wherein the insulating and heat-conducting film (3) is a PI film or a silicon tape.

4. A heat-conducting insulating plate according to claim 1, wherein the heat-conducting silicone rubber (2) is press-fitted to the wall of the hole (101).

5. The heat-conducting insulating plate according to claim 4, wherein the hole wall surface of the hole (101) is integrally provided with a plurality of protrusions (101a) protruding radially inward.

6. A heat-conducting and insulating plate according to claim 5, characterized in that said protrusions (101a) are cambered protrusions.

7. A heat conducting and insulating plate according to claim 1, wherein the holes (101) are hexagonal holes or circular holes.

8. A battery module, comprising:

two battery supports (4) which are arranged at intervals from left to right,

a plurality of battery monomers (5) which are arranged between the two battery brackets and are arranged in a matrix shape,

two bus bars (6) respectively arranged on the outer sides of the two battery supports facing away from each other, and

two water cooling plates (7) respectively arranged on the outer side surfaces of the two bus bars, which are deviated from each other;

a plurality of battery jacks (401) distributed in a matrix shape are arranged on the battery support (4) in a penetrating manner, the left end and the right end of each battery monomer (5) are respectively inserted into the battery jacks (401) of the two battery supports (4), and the two confluence pieces (6) are respectively welded and fixed with the left end and the right end of each battery monomer (5);

characterized in that the heat-conducting and insulating plate as claimed in any one of claims 1 to 7 is sandwiched between the water-cooling plate (7) and the bus bar (6), and the holes (101) are arranged coaxially with the battery receptacles (401).