CN205376610U - Battery module - Google Patents

Abstract

The present application relates to the field of energy storage devices, in particular to a battery module, including a casing, an energy absorbing layer and an insulating layer, the insulating layer is laid inside the casing, and the energy absorbing layer is arranged between the casing and the between the insulating layers. The battery module provided by the present application can effectively absorb the deformation stress caused by the expansion of the cell by providing an energy-absorbing layer between the insulating layer and the casing, thereby avoiding damage to the cell or the casing caused by the direct interaction between the cell and the casing.

Description

battery module

technical field

The present application relates to the field of energy storage devices, in particular to a battery module.

Background technique

At present, due to the advantages of high energy density, high power density, many cycle times, and long storage time, power batteries are widely used in portable electronic devices such as mobile phones, digital cameras, and laptops. Electric vehicles such as bicycles and large and medium-sized electric equipment such as energy storage facilities have broad application prospects, and become the key to solving global problems such as energy crisis and environmental pollution.

In the related technology, during the use of the power battery, with the prolongation of the use time, the expansion of the battery cell continues to increase, so that the expansion force inside the battery module continues to increase, eventually causing the shell to crack due to excessive expansion force, or the battery cell Destroyed by excessive extrusion force.

Utility model content

The present application provides a battery module, which can prevent damage to the battery core and the casing due to expansion force.

The battery module provided by this application includes a casing, an energy-absorbing layer and an insulating layer,

The insulating layer is laid inside the shell, and the energy absorbing layer is arranged between the shell and the insulating layer.

Preferably, the energy-absorbing layer is symmetrically arranged on opposite side walls of the housing.

Preferably, the energy absorbing layer is disposed around the insulating layer.

Preferably, the thickness of the energy-absorbing layer is ≤20mm.

Preferably, the energy-absorbing layer is one or more of rigid foam, honeycomb interlayer, and corrugated interlayer.

Preferably, the thickness of the insulating layer is ≤5mm.

Preferably, the insulating layer is one or more of a resin plate, a film, a rubber pad, and a ceramic plate.

Preferably, the thickness of the shell is ≤20mm.

Preferably, the shell is made of one or more of metal, plastic and composite materials.

Preferably, the shell, the energy-absorbing layer and the insulating layer are connected by one or more of gluing, inlaying, buckling, bolting and welding.

The technical solution provided by the application can achieve the following beneficial effects:

The battery module provided by the present application can effectively absorb the deformation stress caused by the expansion of the cell by providing an energy-absorbing layer between the insulating layer and the casing, thereby avoiding damage to the cell or the casing caused by the direct interaction between the cell and the casing.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the application.

Description of drawings

FIG. 1 is a schematic cross-sectional structure diagram of a battery module provided by an embodiment of the present application.

Reference signs:

10 - shell;

20 - energy absorbing layer;

30 - insulating layer;

40-battery core.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

detailed description

The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings. The terms "front", "rear", "left", "right", "upper" and "lower" mentioned in the text refer to the placement state of the battery module in the drawings.

As shown in FIG. 1 , the embodiment of the present application provides a battery module, including a casing 10 , an energy absorbing layer 20 and an insulating layer 30 . Wherein, the casing 10 is the main structure for containing the electric core 40 , generally in the shape of a box, and a space for accommodating the electric core 40 is formed inside. The battery cells 40 are neatly arranged inside the housing 10 . The insulating layer 30 can ensure that the battery core 40 will not be short-circuited with the outer structure during assembly and use. The energy-absorbing layer 20 is located between the casing 10 and the insulating layer 30, which can meet the requirement that there is basically no deformation under the assembly preload of the battery module, and can absorb the expansion from the battery cell 40 through its own deformation during the use of the battery module. Therefore, the damage to the casing 10 or the battery core 40 caused by expansion can be effectively avoided.

In addition, the energy-absorbing layer 20 can also be used to absorb the extrusion force from the outside of the casing 10 , so it can also well prevent the battery core 40 from being damaged due to external collisions.

Since the electric core 40 generally deforms greatly in the direction perpendicular to the main plane during expansion, while the deformation in other directions is small, so in this embodiment, the energy-absorbing layer 20 is at least symmetrically arranged on the opposite side of the casing 10. Sidewalls on both sides. In this way, when arranging the battery cells 40 , the main planes of the battery cells can be directed toward the side walls on both sides, which can play a better anti-expansion effect. But considering the situation of resisting the external impact of the shell 10, it is better to arrange the energy-absorbing layer 20 around the insulating layer 30 so as to fill the area between the insulating layer 30 and the shell 10, so as to be able to resist external impact in all directions.

In this embodiment, the energy-absorbing layer 20 can be made of rigid foam, honeycomb interlayer or corrugated interlayer board, and only one of them can be used, or several kinds can be used at the same time. The thickness of the energy-absorbing layer 20 can be determined according to the selected material and the working conditions of the battery module. Generally, the thickness of the energy-absorbing layer 20 is preferably not more than 20 mm, so as not to occupy too much space. The preferred thickness range is 5 mm. ~10mm. At the same time, the deformation limit thickness of the energy-absorbing layer 20 should not be too large, generally kept within 4mm, otherwise it may not be able to absorb enough stress. The preferable deformation limit thickness range is 0.1-2 mm.

The insulating layer 30 can be a resin plate, a film, a rubber pad or a ceramic plate, and only one of them can be used, or several of them can be used at the same time. The thickness of the insulating layer 30 can also be determined according to the selected material and the working conditions of the battery module. Generally, the thickness of the insulating layer 30 does not need to be too large, preferably not more than 5mm, and the preferred thickness range is 0.1-1mm.

The shell 10 generally adopts materials with certain strength and rigidity, such as metal, plastic or composite materials, or selects multiple different materials to form together. The thickness of the casing 10 can also be comprehensively considered according to the material used, the number of battery cells to be accommodated, the thickness of the energy-absorbing layer 20 and the insulating layer 30 , and the working conditions. The thickness of the casing 10 should also generally be kept within 20mm, with a preferred range of 1-10mm.

In this embodiment, the housing 10, the energy-absorbing layer 20, and the insulating layer 30 can be fixed in a variety of ways, such as gluing, inlaying, buckling, bolt welding, etc., and these fixing ways can be used alone or Can be mixed. These fixing methods are all mature techniques, so they will not be repeated here.

The battery module provided by the present application can avoid damage caused by direct contact between the battery cell 40 and the casing 10 . In addition, this embodiment can also prevent the battery cell 40 from being damaged due to external impact on the battery module.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. a battery modules, it is characterised in that include shell, absorbing energy layer and insulating barrier,

Described insulating barrier is laid on the inside of described shell, and described absorbing energy layer is arranged between described shell and described insulating barrier.

2. battery modules according to claim 1, it is characterised in that described absorbing energy layer is symmetricly set on the both sides sidewall that described shell is relative.

3. battery modules according to claim 1, it is characterised in that described absorbing energy layer is arranged around described insulating barrier.

4. battery modules according to any one of claim 1 to 3, it is characterised in that the thickness≤20mm of described absorbing energy layer.

5. battery modules according to claim 4, it is characterised in that described absorbing energy layer is one or more in rigid foam, honeycomb interlayer, corrugated sandwich.

6. battery modules according to any one of claim 1 to 3, it is characterised in that the thickness≤5mm of described insulating barrier.

7. battery modules according to claim 6, it is characterised in that described insulating barrier is one or more in resin plate, thin film, rubber blanket, ceramic wafer.

8. battery modules according to any one of claim 1 to 3, it is characterised in that the thickness≤20mm of described shell.

9. battery modules according to claim 8, it is characterised in that described shell is one or more in metal, plastics, composite.

10. battery modules according to any one of claim 1 to 3, it is characterised in that described shell, described absorbing energy layer and described insulating barrier by gluing, inlay, buckle, bolt, one or more in welding are connected.